A neostomy apparatus, including a grasping device, a cutting device and a control handle. The control handle includes a housing and a manipulation portion disposed in the housing, the manipulation portion can move axially relative to the housing; the grasping device or the cutting device includes an elongated member, and the manipulation portion drives the elongated member to move axially; the elongated member is partially located in the housing, and a first limiting structure is further disposed in the housing, the first limiting structure has a groove or a through hole, and a portion of the elongated member located in the housing is at least partially disposed in the groove or the through hole of the first limiting structure.

TECHNICAL FIELD

The embodiments relate to the field of medical apparatuses, in particular to a neostomy apparatus.

BACKGROUND

Heart failure (referred to as “cardiac failure”) is a group of complex clinical syndromes caused by ventricular filling or impaired ejection function due to any heart structural or functional abnormality, which is mainly manifested as dyspnea and asthenia (limited exercise tolerance), and fluid retention (pulmonary congestion and peripheral edema) clinically. Heart failure, as a severe stage developed from various heart diseases, is becoming the most important cardiovascular disease throughout the world.

Heart failure can be divided into diastolic heart failure and systolic heart failure. Diastolic heart failure refers to a congestion syndrome of pulmonary circulation and systemic circulation caused by the decrease of ventricular filling volume and the increase of filling pressure due to the decrease of ventricular relaxation and compliance in case of normal ventricular contraction functions. Diastolic heart failure will result in increased pressure in the left atrium and pulmonary veins, hindering the normal flow of oxygen bearing blood.

Currently, there are a few of methods for treating diastolic heart failure patients. Clinical data show that a small hole is opened on the interatrial septum of a diastolic heart failure patient to form a left-to-right shunt, which is beneficial to reducing the pressure of the heart failure patient in the left atrium. To open a small hole on interatrial septum requires a simple operation of the neostomy apparatus; especially the handle accords with the ergonomics and the control mechanism on the handle is simple.

SUMMARY

The embodiments provide a neostomy apparatus which is simple in construction and manipulation.

The embodiments provide a neostomy apparatus, including a grasping device, a cutting device and a control handle; where, the control handle includes a housing and a manipulation portion disposed in the housing, the manipulation portion may axially move relative to the housing; the grasping device or the cutting device includes an elongated member, and the manipulation portion drives the elongated member to move axially; the elongated member is partially located in the housing, and a first limiting structure is further disposed in the housing, the first limiting structure has a groove or a through hole, and a portion of the elongated member located in the housing is at least partially disposed in the groove or the through hole of the first limiting structure.

In an embodiment, a proximal end of the first limiting structure is close to a distal end of the manipulation portion.

In an embodiment, the grasping device further includes a catheter body, where the elongated member is disposed to pass through the catheter body, and a proximal end of the catheter body is connected to the housing; and the housing is provided with a sealing assembly; the sealing assembly is located at the distal end of the housing and is sealingly connected to the proximal end of the catheter body, and the catheter body may be communicated with a negative pressure source through the sealing assembly, such that a negative pressure is formed in the catheter body under the action of the negative pressure source.

In an embodiment, the sealing assembly includes a hollow pipe body and a sealing member connected at both ends of the hollow pipe body; a vent hole is opened on a sidewall of the hollow pipe body, and the negative pressure source is communicated with the vent hole via a hose.

In an embodiment, the manipulation portion is connected with a second limiting structure; the second limiting structure may house the elongated member and is coaxial with the first limiting structure; a proximal end of the second limiting structure and a proximal end of the elongated member are fixed on the manipulation portion; a distal end of the second limiting structure is inserted into the groove or the through hole of the first limiting structure and may move axially relative to the first limiting structure under the action of the manipulation portion.

In an embodiment, a linear guide rail is fixedly disposed in the housing; the manipulation portion is slidably disposed on the linear guide rail; one or more arc-shaped grooves are disposed on a side of the linear guide rail; an elastic member and a ball are disposed in the manipulation portion; the ball is elastically abutted against one side of the linear guide rail opened with the arc-shaped groove under the action of the elastic member; and when the manipulation portion moves until the ball is opposite to the arc-shaped groove along the linear guide rail, partial structures of the ball are abutted into the arc-shaped groove.

In an embodiment, the neostomy apparatus further includes a conductive structure and a conductive interface disposed at a proximal end portion of the housing; the conductive structure always keeps electric connection with the manipulation portion and the conductive interface when the manipulation portion moves axially.

In an embodiment, the housing is provided with a conductive sliding rail, and a proximal end of the conductive sliding rail is connected to the conductive structure; and the manipulation portion is slidably connected to the conductive sliding rail, and the manipulation portion may move axially relative to the conductive sliding rail.

In an embodiment, the conductive structure includes a conductive elastic piece, and the conductive elastic piece is disposed at a sliding connection portion between the manipulation portion and the conductive sliding rail; when the manipulation portion moves axially along the conductive sliding rail, the conductive elastic piece is always abutted against the conductive sliding rail.

In an embodiment, the manipulation portion includes a sliding block and a pushing member; the sliding block is slidably disposed in the housing and is connected to the proximal end of the elongated member; the pushing member is connected to the sliding block, and partial structures of the pushing member are exposed to the housing, and the pushing member may move axially relative to the housing, such that the sliding block drives the elongated member to move axially.

The embodiments provide a neostomy apparatus, including a control handle; the control handle adsorbs a tissue at a position which requires neostomy by negative pressure generated by the catheter body in communication with a negative pressure source. Moreover, a first manipulation portion is utilized to drive a push rod to move axially in the catheter body such that a grasping portion connected to a distal end of the push rod is manipulated to grasp the tissue sucked into the catheter body, thereby facilitating the subsequent cutting and neostomy conducted on the tissue sucked into the catheter body by a second manipulation portion and a third manipulation portion. Moreover, buckle-proof or anti-buckling cannulas are sleeved on a push rod, a traction fiber and a control fiber of the cutting device.

DETAILED DESCRIPTION OF THE EMBODIMENTS

For the convenience of understanding the embodiments, the embodiments will be described more comprehensively below with reference to relevant drawings.

Implementations of the embodiments are set forth in the drawings. However, the embodiments may be implemented in many different forms, but are not limited to the embodiments described herein. On the contrary, these embodiments are provided such that the embodiments are understood more thoroughly and comprehensively.

It can be understood that the terms “distal end” and “proximal end” are used as nouns of locality which are customary terms in the field of medical apparatus. The “distal end” denotes an end away from the operator during operation, and “proximal end” denotes an end close to the operator during operation. The axial direction refers to a direction parallel to the line of centers between the distal center and the proximal center of the medical apparatus; the radial direction refers to a direction perpendicular to the above axial direction.

Referring toFIGS.1and2, the neostomy apparatus100provided by the embodiments includes a grasping device, a cutting device20and a control handle30. Both the grasping device and the cutting device include an elongated member partially located within the control handle. The elongated member may include a push rod, a traction firer, and a control firer.

The grasping device includes a catheter body11, a grasping portion12and a push rod13. A proximal end of the catheter body11is connected to the control handle30; the grasping portion12is disposed in the catheter body11and located at the distal end of the catheter body11; a distal end portion of the push rod13is sleeved on the grasping portion12, and the push rod13may move axially in the catheter body11, so as to control the grasping portion12to perform a grasping operation.

The catheter body11has a hollow tubular structure which may be communicated with a negative pressure source to form negative pressure in the catheter body11under the action of the negative pressure source. Thus, a tissue of interatrial septum is absorbed by the negative pressure formed in the catheter body11. The grasping portion12at the distal end of the catheter body11may grasp the tissue of human interatrial septum sucked into the lumen of the catheter body11by the neostomy apparatus100when it moves axially on the push rod13.

The grasping portion12includes at least two oppositely disposed clamping jaws121and122which are fixed inside the distal end of the catheter body11. A distal end portion of the push rod13is sleeved on the grasping portion12, and thus, the push rod13may manipulate the opening or closure of the clamping jaws121and122in the grasping portion12when the push rod13moves axially relative to the catheter body11, thus achieving a clamping action.

The cutting device20includes a cutting portion21, a traction fiber22and a control fiber23. The cutting portion21is disposed at the distal end of the catheter body11and partially surrounds the outer wall at an opening portion of the distal end of the catheter body11. The cutting portion21is configured for cutting the tissue of human interatrial septum sucked into the lumen of the catheter body11by the neostomy apparatus100. Both the distal ends of the traction fiber22and the control fiber23are connected to the cutting portion21.

A first limiting structure, a push rod, a traction fiber and a control fiber are all partially located in the housing of the handle, and the portions located in the housing are all at least partially disposed in the groove or through hole of the first limiting structure. The structure is described in detail below.

A control handle30is used for manipulating the grasping device10of the neostomy apparatus100for gripping and is further used for the cutting device20of the neostomy apparatus100for cutting.

In combination withFIGS.1and3, the control handle30includes a housing31and a manipulation portion disposed within the housing31, and the manipulation portion manipulates the elongated member to move axially. The manipulation portion may particularly include a first manipulation portion32, a second manipulation portion33and a third manipulation portion34. The manipulation portion includes a sliding block and a pushing member; the sliding block is slidably disposed in the housing and connected to the proximal end of the elongated member; the pushing member is connected to the sliding block, and partial structures of the pushing member are exposed to the housing, and the pushing member may move axially relative to the housing, such that the sliding block drives the elongated member to move axially. In addition, an opening is opened on a sidewall of the housing, and a portion of the pushing member is exposed to the housing through the opening, and the opening has a certain length along the axial direction of the housing, and the axial length of the opening limits the axial moving range of the pushing member.

The proximal end of the catheter body11is connected to the housing31, and a sealing assembly350is disposed in the housing31; the sealing assembly350is located at the distal end of the housing31and is sealingly connected to the proximal end of the catheter body11, such that after the catheter body11is in communication with the negative pressure source, the catheter body11may generate a negative pressure better under the action of the negative pressure source, so as to effectively suck the tissue of human interatrial septum into the lumen of the catheter body11for the subsequent grasping operation of the grasping device and the cutting operation of the cutting device20.

As shown inFIG.5, the sealing assembly350includes a hollow pipe body351and a sealing member352connected at two ends of the hollow pipe body351; a vent hole351ais opened on a sidewall of the hollow pipe body351; and the negative pressure source is communicated with the vent hole351avia a hose306. Partial sections of the hose306may be disposed in the housing31and may be connected to an external negative pressure source via a three-way valve307after being led out from the housing31, such that the three-way valve307may regulate the negative pressure source to act on the catheter body11, and accordingly, the catheter body11may adsorb the tissue of human interatrial septum with a suitable negative pressure.

With continuing reference toFIG.5, the housing31includes a first housing311and a second housing312which may be fastened together by a buckle, a screw or a glue bonding way. The distal end of the housing31may be tightly locked by a head cover304. For example, when the first housing311and the second housing312are buckled together, the distal end thereof forms an external thread, and the head cover304is in threaded fit connection to the distal end of the housing31, thereby locking the first housing311and the second housing312together and preventing the first housing311and the second housing312from loosening.

In some embodiments, the proximal end of the housing31may enclose a connection port of a radio frequency probe in the form of a trailing housing305, such that the neostomy apparatus100is connected to an external high frequency equipment through the port. The neostomy apparatus100and a negative plate on the body surface form a current loop in operation, thereby satisfying the power-on needs of the cutting device20for operation.

It may be understood that the proximal end of the housing31refers to the end where the housing31faces the operator during handling and using, after being assembled to the neostomy apparatus.

With continuing reference toFIGS.1and3, the housing31may be divided into a distal end section301, a proximal end section302, and a body section303connected between the distal end section301and the proximal end section302when the control handle30is manipulated. The distal section301may serve as a holding area for stabilizing the neostomy apparatus100during operation. An arc-shaped convex structure may be formed on an upper surface of the proximal section302to press against the palm to manipulate the control handle30. For example, a first manipulation portion32, a second manipulation portion33and a third manipulation portion34are distributed on the body section303, used for manipulating the grasping device10and the cutting device20, respectively. In other embodiments, the distribution position, i. e., the order, of the first manipulation portion32, the second manipulation portion33, and the third manipulation portion34is not limited in the housing31as long as these portions are adapted to the corresponding manipulation requirements only.

The first manipulation portion32, the second manipulation portion33and the third manipulation portion34are respectively used for manipulating the axial movement of the push rod13, the traction fiber22and the control fiber23in the catheter body11, respectively, as an example, to further describe the structure of the manipulation handle.

For example, in combination withFIGS.3to5, the first manipulation portion32is connected to the proximal end13aof the push rod13and is configured for driving the push rod13to move axially relative to the catheter body11, such that the grasping portion12opens or closes under the axial movement of the push rod13, thereby achieving the grasping manipulation of the grasping portion12via the first manipulation portion32.

The second manipulation portion33is connected to the proximal end22aof the traction fiber22and is configured for driving the traction fiber22to move axially in the catheter body11. Since the traction fiber22is connected to the cutting portion21of the cutting device20, the second manipulation portion33drives the traction fiber22to move axially in the catheter body11, such that the cutting portion21may be suspended at the distal end of the catheter body11transformed from a tight state bound to the catheter body11. Accordingly, the third manipulation portion34is connected with the proximal end23aof the control fiber23and is configured for driving the control fiber23to move axially in the catheter body11, thus holding the control fiber23into the catheter body11.

In some embodiments, the traction fiber22and the control fiber23are symmetrically disposed on the wall of the catheter body11to exert an axial push-pull force on the opposite sides of the cutting portion21connected on the distal ends of the traction fiber22and the control fiber23. In other embodiments, the traction fiber22and the control fiber23may also be disposed asymmetrically as long as it is ensured that the cutting portion21may be manipulated by the axial movement of the traction fiber22and the control fiber23in the catheter body11. Therefore, the cutting portion21cuts the tissue of human interatrial septum sucked into the catheter body11.

In some embodiments, the first limiting structure includes a cannula. For example, a first sleeve pipe361is fixedly disposed between the sealing assembly350and the first manipulation portion32in the housing31; and the push rod13may be movably disposed to pass through the first sleeve pipe361axially, such that when the first manipulation portion32drives the push rod13to move towards the distal end due to the guiding effect of the first sleeve pipe361on the push rod13, the push rod13is not easily bent due to the radial constraint of the first sleeve pipe361, thereby improving the manipulation reliability.

It may be understood that the first sleeve pipe361serves as a limiting structure to produce a restraining effect in the radial direction when the push rod13moves in the axial direction, and the structure is configured to adapt to the first manipulation portion32such that the push rod13is driven to move axially, thereby manipulating the grasping portion12for grasping operation. Further, the configuration of the first sleeve pipe361does not interfere with the first manipulation portion32to manipulate the push rod13to move axially. For example, in some embodiments, the proximal end surface of the first sleeve pipe361just contacts the side on which the distal end of the first manipulating portion32is located when the push rod13is manipulated by the first manipulation portion32to move axially toward the distal end to a limiting position. In another example, in other embodiments, there is an interval or gap between the proximal end surface of the first sleeve pipe361and the side on which the distal end of the first manipulation portion32is located when the push rod13is manipulated by the first manipulation portion32to move axially toward the distal end to a limiting position. Whether the proximal end surface of the first sleeve pipe361is just in contact with or has a gap with the side on which the distal end of the first manipulation portion32is located, it is ensured that the first sleeve pipe361will not interfere with the movement of the first manipulation portion32towards the distal end when the push rod13is driven by the first manipulation portion32to manipulate the grasping portion12for operation.

With continuing reference toFIGS.3and5, in some embodiments, a second sleeve pipe362and a third sleeve pipe363are fixedly disposed in the housing31; distal ends of the second sleeve pipe362and the third sleeve pipe363are respectively fixed to the proximal end of the sealing assembly350. The traction fiber22may be axially disposed to pass through the second sleeve pipe362movably, and the control fiber23may be axially disposed to pass through the third sleeve pipe363movably, such that the second sleeve pipe362and the third sleeve pipe363may have a better radial restraining effect on the traction fiber22and the control fiber23, respectively. Thereby, the above configuration prevents the traction fiber22and the control fiber23from being easily bent under the pushing force of the second manipulation portion33and the third manipulation portion34.

Two or more spaced supporting sheets308are disposed in the housing31at a position near the distal end; the supporting sheets308are fixed on the inner surface of the housing31. Ports308aare opened on the setting paths of the first sleeve pipe361, the second sleeve pipe362and the third sleeve pipe363, such that the first sleeve pipe361, the second sleeve pipe362and the third sleeve pipe363are located in the corresponding ports308a, thus stably fixing the first sleeve pipe361, the second sleeve pipe362and the third sleeve pipe363in the housing31by the ports308a.

The ports308amay be a circular arc groove having a diameter comparable to or slightly smaller than that of the first sleeve pipe361, the second sleeve pipe362and the third sleeve pipe363.

A gland309may be disposed between the supporting sheets308to further fasten the first sleeve pipe361, the second sleeve pipe362, and third sleeve pipe363.

For example, both ends of the gland309are respectively fixed to the housing31by buckling, welding, glue bonding or screws, or the like. The gland309is pressed on the first sleeve pipe361, the second sleeve pipe362and the third sleeve pipe363, so as to achieve a better stabilizing effect and prevent the first sleeve pipe361, the second sleeve pipe362and the third sleeve pipe363from loosening in the housing31, thus affecting the guiding effect.

The diameters of the first sleeve pipe361, the second sleeve pipe362and the third sleeve pipe363may or may not be the same so long as they are adapted to produce a radial restraining effect on the inner members thereof, thus achieving the purpose of preventing buckling. Taking the first sleeve pipe361as an example, the bore diameter of the first sleeve pipe361may be slightly greater than the outer diameter of the push rod13, such that when the push rod13is subjected to an axial pressing force and thus has a tendency of radial deflection, the first sleeve pipe361with a slightly bore diameter may prevent the radial deflection of the push rod13, thereby achieving a better anti-buckling effect. It can be appreciated that, in other embodiments, the cannula may be disposed alternatively; for example, a cannula may be disposed only outside the control fiber and the traction fiber, but not disposed outside the push rod.

In some embodiments, the manipulation portion is further provided with a second limiting structure, the second limiting structure includes a telescopic sleeve. For example, a first telescopic sleeve pipe371is connected on the second manipulation portion33; the first telescopic sleeve pipe371is coaxially sleeved between the traction fiber22and the second sleeve pipe; the proximal end of the first telescopic sleeve pipe371and the proximal end22aof the traction fiber22are fixed to the second manipulation portion33; the distal end of the first telescopic sleeve pipe371is inserted into the second sleeve pipe362and may move axially relative to the second sleeve pipe362under the action of the second manipulation portion33. And during the movement of the second manipulation portion33, the distal end of the first telescopic sleeve pipe371may not be exposed from the proximal end of the second sleeve pipe362. In this embodiment, the first telescopic sleeve pipe371may be telescopically positioned between the traction fiber22and the second sleeve pipe362to further enhance the radial constraint on the traction fiber22, thus effectively resisting buckling and maintaining the ability of the traction fiber22to move axially relative to the second sleeve pipe362. In this configuration, the proximal end of the first telescopic sleeve pipe371and the proximal end of the traction fiber22are fixed on the second manipulation portion33; and the distal end of the first telescopic sleeve pipe371is inserted into the second sleeve pipe362. Thereby, when the second manipulation portion33drives the traction fiber22to move axially, the traction fiber22always gains the restraining effect of the first telescopic tube371in the radial direction. Therefore, even when the proximal end22aof the traction fiber22stretches out a relatively long distance from the proximal end362aof the second sleeve pipe362, the traction fiber22is not easily radially deflected due to the radial constraint of the first telescopic sleeve pipe371. Thereby, the traction fiber22may maintain a better axial movement performance under the axial telescopic movement between the first telescopic sleeve pipe371and the second sleeve pipe362, thus enhancing the manipulation effect of the second manipulation portion33on the traction fiber22.

In some embodiments, a second telescopic sleeve pipe372is connected on the third manipulation portion34; the second telescopic sleeve pipe372is coaxially sleeved between the control fiber23and the third sleeve pipe. The proximal end of the second telescopic sleeve pipe372and the proximal end23aof the control fiber23are fixed to the third manipulation portion34, and the distal end of the second telescopic sleeve pipe372is inserted into the third sleeve pipe363and may move axially relative to the third sleeve pipe363under the action of the third manipulation portion34. During the movement of the third manipulation portion34, the distal end of the second telescopic sleeve pipe372is not exposed from the proximal end of the third sleeve pipe363. The second telescopic sleeve pipe372is axially and telescopically inserted into the third sleeve pipe363, thus being meeting the anti-buckling requirement when the control fiber23is pushed and pulled with a large stroke in an axial direction. In particular, the proximal end of the second telescopic sleeve pipe372is fixed to the third manipulation portion34together with the proximal end23aof the control fiber23, such that when the second manipulation portion33drives the control fiber23to move axially, the second telescopic sleeve pipe372always exerts a better radial restraining effect on the control fiber23to prevent the control fiber23from buckling.

It can be further understood that the diameter and length of the first and second telescopic sleeves371and372are adapted to the radial constraint requirements of the internal components thereof only. Taking the second telescopic sleeve pipe372as an example, the second telescopic sleeve pipe372is sleeved between the control fiber23and the third sleeve pipe363, and the inner wall of the second telescopic sleeve pipe372may be closely coated on the control fiber23, and may also form a certain gap with the outer wall of the control fiber23. Accordingly, the inner wall of the third sleeve pipe363may be closely coated on the second telescopic sleeve pipe372, and may also form a certain gap with the outer wall of the second telescopic sleeve pipe372. The above configuration may not only maintain the smooth movement of the control fiber23and the second telescopic sleeve pipe372relative to the third sleeve pipe363in the axial direction, but also may limit the radial deflection of the control fiber23by the axial telescopic movement of the second telescopic tube372in the third sleeve pipe363, thereby effectively ensuring that the control fiber23is free of buckling, and improving the manipulation reliability.

It can be appreciated that in this embodiment, the axial displacement distance of the first manipulation portion is smaller than that of the second manipulation portion and the third manipulation portion. Moreover, the outer diameter of the push rod is larger than that of the control fiber and the traction fiber. Therefore, other telescopic sleeves may be not disposed between the first sleeve pipe and the control fiber. That is to say, whether a sleeve pipe or a telescopic sleeve pipe is disposed according to the displacement distance and the outer diameter of the corresponding fiber or rod. A person skilled in the art may make corresponding changes, substitutions or choices according to actual situations.

It can be understood that in other embodiments, the limiting structure may also be a guide rail fixed on the inner wall of the housing, and the guide rail is provided with a groove or a through hole; and the elongated member is disposed in the groove or the through hole; alternatively, the limiting structure may be a part of the pipe body; the limiting structure forms a groove. That is, the cross section of the limiting structure is a section of arc, such that the elongated member is received within the groove.

In some embodiments, in combination withFIGS.4and5, the first manipulation portion32includes a first sliding block321and a first pushing member322. The first sliding block321is slidably disposed in the housing31and is connected to the proximal end13aof the push rod13; the first pushing member322is connected to the first sliding block321, and partial structures of the first pushing member322are exposed to the housing31; and the first pushing member322may move axially relative to the housing31, such that the first sliding block321drives the push rod13to move axially.

In combination withFIG.6, in some embodiments, the first sliding block321may be rectangular. In other embodiments, the first sliding block321may also be in other shapes, for example, the first sliding block321may be in a triangular or elliptical shape on a cross section perpendicular to the axial direction; the shape of the first sliding block321is not defined herein as long as the first sliding block321moves along the linear guide rail380, thus driving the push rod13to move axially in the catheter body11.

The first sliding block321is provided with one or more first connecting holes3211such that the first connecting hole3211is matched with connecting members, such as, a screw or a bolt, thus fixedly connecting the first pushing member322with the first sliding block321.

The first sliding block321is provided with a first insertion hole3212extending in an axial direction, and a positioning hole3213communicating through the first insertion hole3212from a radial direction; the proximal end13aof the push rod13is inserted into the first insertion hole3212; and locking members, such as, a screw or a top thread, are fastened to the positioning hole3213and abutted against the proximal end13aof the push rod13in the first insertion hole3212, such that the proximal end13aof the push rod13is fixedly connected on the first sliding block321.

The second manipulation portion33and the third manipulation portion34are both located on one side where the proximal end of the first manipulation portion32is located; the first sliding block321is provided with a first through hole3213and a second through hole3214which extend in an axial direction. The second sleeve pipe362and the third sleeve pipe363are axially and movably disposed to pass through the first through hole3213and the second through hole3214, respectively. Such a configuration mode achieves that the second sleeve pipe362is utilized to exert an anti-buckling effect on the traction fiber22and the third sleeve pipe363is utilized to exert an anti-buckling effect on the control fiber23; and the second sleeve pipe362and the third sleeve pipe363may be axially and movably disposed to pass through the first sliding block321of the first manipulation portion32, not interfering with the axial movement of the first sliding block321.

It can be appreciated that the second sleeve pipe362and the third sleeve pipe363may be disposed axially and movably to pass through the first sliding block321of the first manipulating portion32, such that when the push rod13is driven by the first sliding block321to move axially in the catheter body11, the second sleeve pipe362and the third sleeve pipe363may always be supported by the first sliding block321, thus obtaining axial stability. Accordingly, the second sleeve pipe362may have a better guiding effect on the traction fiber22in the axial direction so as to prevent the traction fiber22from deviating radially. Correspondingly, the third sleeve pipe363may have a better guiding effect on the control fiber23in the axial direction so as to prevent the control fiber23from deviating radially.

The second manipulating portion33and the third manipulating portion34are sequentially disposed in the axial direction on the side where the proximal end of the first manipulating portion32is located.

In this embodiment, the second manipulation portion33includes a second sliding block331and a second pushing member332; the second sliding block331is slidably disposed in the housing31and is connected to the proximal end22aof the traction fiber22; the second pushing member332is connected to the second sliding block331, and partial structures of the second pushing member332are exposed to the housing31, and the second pushing member332may move axially relative to the housing31, such that the traction fiber22is driven by the second sliding block331to move axially.

In combination withFIGS.4and5, a linear guide rail380is fixedly disposed in the housing31, and the first sliding block321and the second sliding block331are slidably disposed on the linear guide rail380. For example, the first sliding block321and the second sliding block331are both provided with a sliding groove or a sliding hole30ain sliding fit with the linear guide rail380, such that the linear guide rail380is slidably disposed to pass through the sliding groove or the sliding hole30a. The above configuration may achieve the sliding fit of the first sliding block321and the second sliding block331with the linear guide rail380. Understandably, since the first sliding block321is required to drive the push rod13to move axially and the second sliding block331is required to drive the traction fiber22to move axially, the linear guide rail380is substantially axially disposed in the housing31.

The sliding groove or sliding hole30amay be rectangular or triangular in the cross section perpendicular to an axial direction, or “I”-shaped. Accordingly, the linear guide rail380has a structural form adapted to the sliding groove or sliding hole30a, which will not be described in detail herein.

The second sliding block331has a structure similar to that of the first sliding block321. For example, in combination withFIG.7, in some embodiments, the second sliding block331may be rectangular. In other embodiments, the second sliding block331may also be in other shapes. For example, the second sliding block331may be in a triangular or elliptical shape on the cross section perpendicular to an axial direction. The shape of the second sliding block331is not defined here provided that the second sliding block331may move along the linear guide rail380to drive the traction fiber22to move axially in the catheter body11.

The second sliding block331is provided with one or more second connecting holes3311, such that the second connecting hole3311is matched with connecting members, such as, a screw or a bolt, thus fixedly connecting the second pushing member332with the second sliding block331. Accordingly, the second sliding block331is provided with a second insertion hole3312extending in an axial direction, and a locking hole3313penetrating and communicating with the second insertion hole3312in a radial direction. The proximal end22aof the traction fiber22and the proximal end of the first telescopic sleeve pipe371are inserted into the second insertion hole3312; locking members, such as, a screw or a top thread, are fastened to the locking hole3313and abutted against the traction fiber22and the first telescopic sleeve pipe371in the second insertion hole3312, such that the proximal end22aof the traction fiber22and the proximal end of the first telescopic sleeve pipe371are fixedly connected on the second sliding block331.

It can be understood that in some embodiments, the first telescopic sleeve pipe371outside the traction fiber22may be omitted, i. e., the first telescopic sleeve pipe371need not be connected on the second sliding block331, such that the traction fiber22may be disposed directly to pass through the second sleeve pipe362. And in this case, the locking member may be engaged with the locking hole3313in threaded fit and abutted against the proximal end22aof the traction fiber22, such that the second sliding block331manipulates the traction fiber22to move axially in the catheter body11under the action of the second pushing member332.

The second sliding block331is provided with a third through hole3314, and the third sleeve pipe363may be axially disposed to pass through the third through hole3314movably, such that the control fiber23disposed to pass through the third sleeve pipe363may pass through the second sliding block331, and the proximal end23aof the control fiber23is connected to the third manipulation portion34. Further, the second sliding block331may move axially relative to the third sleeve pipe363, such that the second sliding block331is not interfered by the third sleeve pipe363when driving the traction fiber22to move axially.

It may be understood that the third sleeve pipe363is always disposed to pass through the third through hole3314during the movement of the second sliding block331, such that the third sleeve pipe363is utilized to exert a better axial guiding effect on the control fiber23, thus preventing the control fiber23from being pressed and bent.

In some embodiments, a clamping structure is disposed at the sliding fit portion between the first sliding block321and the linear guide rail380, and/or, the sliding fit portion between the second sliding block331and the linear guide rail380, such that the clamping structure may exert a better effect of prompting being in place, thereby making the manipulation simpler when the first sliding block321or the second sliding block331slides to the corresponding position.

A clamping structure between the first sliding block321and the linear guide rail380is merely set as an example for description.

In combination withFIG.8, one or more arc-shaped grooves381are disposed on the side of the linear guide rail380; an elastic member323and a ball324are disposed in the first sliding block321; the ball324is elastically abutted on one side of the linear guide rail380provided with the arc-shaped groove381under the action of the elastic member323. When the first sliding block321moves along the linear guide rail380until the ball324is opposite to the arc-shaped groove381, partial structures of the ball324are abutted into the arc-shaped groove381. Therefore, a sound is generated due to the impact between the ball324and the linear guide rail380at the arc-shaped groove381once the ball324is abutted into the arc-shaped groove381, thus exerting a better effect of prompting being in place, achieving simple operation and avoiding poor effect caused by insufficient manipulation or over-manipulation. In addition, the opening on the housing may exert the limiting effect in axial length, and may prompt the maximum movement limit for the operator better in coordination with the sound feedback effect of the elastic member and the ball.

Accordingly, the above clamping structure may be configured by the second sliding block331and the linear guide rail380directly, so as to prompt the second sliding block331being positioned in place, which will not be described in detail herein.

It may be understood that the number and position of the arc-shaped grooves381on the linear guide rail380may be configured according to the positioning requirements of the first sliding block321and/or the second sliding block331. For example, in some embodiments, as shown inFIG.8, two arc-shaped grooves381are respectively disposed at the proximal end380aand the distal end380bof the linear guide rail380in the extension direction thereof; and an arc-shaped groove381is disposed in the middle, such that when the first sliding block321moves towards the distal end380aalong the linear guide rail380to be opposite to the arc-shaped groove381at the distal end380a. Since the ball324disposed in the first sliding block321will make an impact sound when the ball324is clamped into the arc-shaped groove381under the elastic force of the elastic member323, which may exert a prompt effect when the first sliding block321slides to the distal end380aof the linear guide rail380. Accordingly, when the second sliding block331moves toward the proximal end380balong the linear guide rail380to be opposite to the arc-shaped groove381at the proximal end, the ball324disposed in the second sliding block331is clamped into the arc-shaped groove381located at the proximal end380b. The above configuration also may exert a prompt effect when the second sliding block331slides relative to the linear guide rail380.

The elastic member323may be a spring, or may be an elastic bar or rod made of an elastic material.

The prompt of being in place may be achieved between the first sliding block321/the second sliding block331and the linear guide rail380by a same structural form.

An assembly structure between the first sliding block321and the linear guide rail380is merely set as an example to further describe the mounting forms of the elastic member323and the ball324.

With continuing reference toFIG.8, a through hole321ais disposed on the side wall of the first sliding block321; the through hole321apenetrates to the side wall of a sliding hole30aof the first sliding block321; and the elastic member323is abutted against and communicated with the ball324to be mounted into the through hole321atogether, such that the ball324is abutted to the linear guide rail380in sliding fit with the sliding hole30a. A stopping member, such as, a spacer325or a baffle, is disposed on a side wall of the first sliding block321opened with the through hole321a, thus positioning the elastic member323, thereby preventing the elastic member323from being withdrawn from the through hole321a.

A spacer325is taken as a stopping member as an example, and the spacer325is locked to a mounting hole location321bon the first sliding block321via connecting members326, such as a screw or a bolt. The spacer325covers the through hole321aand is abutted against the elastic member323. Then, the elastic member323is in a compressed state and the ball324is elastically abutted against the linear guide rail380. Further, when the first sliding block321moves relative to the linear guide rail380such that the ball324is opposite to the arc-shaped groove381, the ball324is abutted into the arc-shaped groove381under the elastic force of the elastic member323to make a sound, thus prompting that the first sliding block321slides in position along the linear guide rail380. That is, the push rod13is driven by the first sliding block321to manipulate the opening or closure of the grasping portion12.

In other embodiments, the stopping member may be also fixed on the side wall of the first sliding block321which is opened with the through hole321aby welding or gluing, and abutted against an end portion of the elastic member323close to the outside of the through hole321a, thus limiting the elastic member323to be popped out from the through hole321a.

In combination withFIGS.3to5, a conductive sliding rail390is fixedly disposed in the housing31, and the proximal end of the conductive sliding rail390is connected to a conductive interface (not shown) at a proximal end portion of the housing. The third manipulation portion34is slidably connected to the conductive sliding rail390, i. e., the third manipulation portion34may move axially relative to the conductive sliding rail390. A conductive elastic piece343is disposed at a sliding connection portion between the third operation manipulation portion34and the conductive sliding rail390; the conductive elastic piece343is fixedly connected to the third manipulation portion34; and when the third manipulation portion34slides along the conductive sliding rail390, the conductive elastic piece343keeps elastically abutted against the conductive sliding rail390. For example, the third manipulation portion34includes a third sliding block341and a third pushing member342. The third sliding block341is slidably disposed on the conductive sliding rail390and connected to the proximal end23aof the control fiber23, and a third pushing member342is connected to the third sliding block341. Partial structures of the third pushing member342are exposed to the housing31so as to manipulate the third pushing member342; the third pushing member342may move axially relative to the housing31, such that the third sliding block341drives the control fiber23to move axially; a conductive elastic piece343is disposed at the sliding connection portion of the third sliding block341and the conductive sliding rail390, and the conductive elastic piece is fixedly connected to the third sliding block. When the third manipulation portion34slides along the conductive sliding rail390, the conductive elastic piece343keeps abutted against the conductive sliding rail390, such that the conductive elastic piece343always maintains electric contact with the conductive sliding rail390, thus meeting the power supply requirements of the cutting device20.

In combination withFIG.9, the third sliding block341has a cuboid structure. In other embodiments, the third sliding block341may be in other shapes, for example, the third sliding block341is in a triangular or elliptical shape in the cross section perpendicular to an axial direction. The shape of the third sliding block341is not defined here as long as the third sliding block341may move along the conductive sliding rail390, thus driving the control fiber23to move axially in the catheter body11.

The third sliding block341has an axially extending through hole341ahaving an inner diameter slightly larger than an outer diameter of the second telescopic sleeve pipe372, such that the second telescopic sleeve pipe372is inserted into the through hole341a. The third sliding block341further has a first threaded hole341band a second threaded hole341c.

The first threaded hole341bis configured for cooperating with connecting members, such as, a screw or a bolt, such that the third sliding block341is fixedly connected with the third pushing member342. The number and the position of the first threaded holes341bon the third sliding block341may be reasonably configured according to the connection requirements of the third sliding block341and the third pushing member342, which is not defined here.

The second threaded hole341cis orthogonal to the position of the through hole341a. After the proximal end of the second telescopic sleeve pipe372and the proximal end of the control fiber23located therein are inserted into the through hole341a, fasteners, such as, a screw or a top thread are threadedly engaged at the second threaded hole and abutted against the proximal end of the second telescopic sleeve pipe372and the proximal end23aof the control fiber23, such that the proximal end of the second telescopic sleeve pipe372and the proximal end of the control fiber23are fixed connected with the third sliding block341.

It may be understood that, in some embodiments, the second telescopic sleeve pipe372may be omitted, namely, the control fiber23is directly disposed to pass through the third sleeve pipe363. At this time, the fastener is threadedly engaged at the second threaded hole341c, abutted against the proximal end23aof the control fiber23inserted into the through hole341a, such that the control fiber23is connected with the third sliding block341. Furthermore, the third sliding block341may manipulate the control fiber23to move axially in the catheter body11under the action of the third pushing member342.

With continuing reference toFIG.9, the third sliding block341further has a square through hole341dhaving a size much greater than the size of the cross section of the conductive sliding rail390, such that the third sliding block341has sufficient mounting space to arrange the conductive elastic piece343when the third sliding block341is slidingly engaged with the conductive sliding rail390through the square through hole341d.

For example, a mounting hole341eis opened on a side wall of the square through hole341don the third sliding block341; the conductive elastic piece343has a connecting portion3431provided with a through hole343a, and the conductive elastic piece343is mounted into the square through hole341d. Connecting members, such as a screw or bolt, pass through the through hole343aof the conductive elastic piece343and are fixed on the mounting hole341e, such that the conductive elastic piece343is fixedly connected with the third sliding block341. It may also be understood that in this embodiment, since the control fiber23is not in direct contact with the conductive elastic piece343or the conductive sliding rail390, the third sliding block341should be made of a conductive material. It can be appreciated that in other embodiments, when the control fiber is directly connected to a conductive elastic piece or a conductive sliding rail, or indirectly connected via other electric conductors, the third sliding block is no longer limited to being made of a conductive material.

In other embodiments, the conductive elastic piece343may also be fixed at the square through hole341dof the third sliding block341by welding, glue bonding or buckle connection, or the like only when the conductive sliding rail390is in sliding fit with the third sliding block341, the conductive elastic piece343is in elastic contact with the conductive sliding rail390, thus achieving an electric connection therebetween.

The conductive elastic piece343has one or two elastic abutting portions3432bent and projected by the connecting portion3431, such that when the conductive sliding rail390is assembled into the square through hole341dof the third sliding block341, the elastic abutting portions3432are elastically abutted against and keep an electric contact with the conductive sliding rail390. Therefore, when the third sliding block341moves along the conductive sliding rail390, the conductive elastic piece343still keeps a good electric contact with the conductive sliding rail390, so as to meet the power supply requirements of the cutting device20.

The elastic abutting portion3432is “V”-shaped or “U”-shaped so as to maintain a line contact or a surface contact with the conductive sliding rail390, thus obtaining a better electric contact effect. Meanwhile, the above configuration reduces the sliding friction of the conductive elastic piece343during the movement of the third sliding block341relative to the conductive sliding rail390so as to avoid abrasion, thereby ensuring stable electric contact between the conductive elastic piece343and the conductive sliding rail390.

In other embodiments, the structure where the third sliding block341is in sliding fit with the conductive sliding rail390may not be a square through hole341. For example, if the conductive sliding rail390is an I-shaped guide rail, the structure where the third sliding block341is in fit connection with the conductive sliding rail390may be a sliding groove with an I-shaped cross section. For another example, if the conductive sliding rail390has a triangular cross section, the sliding groove where the third sliding block341is in fit connection with the conductive sliding rail390has a triangular cross section.

It may be understood that the conductive elastic piece343and the conductive sliding rail390may be made of easily conductive metal materials such as, iron, aluminum, copper. But the material of the conductive elastic piece343is not limited herein as long as the conductive elastic piece343may be in electric contact with the conductive sliding rail390so as to meet the power supply requirements of the cutting device20.

A conductive structure is disposed in the housing, and when the conductive interface at the proximal end of the housing is powered on, it may be ensured that the third sliding block is also always in a powered state, thus avoiding the failure of cutting caused by the invalid electric connection when cutting tissues.

It can be appreciated that in other embodiments, the electric connection between the conductive sliding rail and the third sliding block may also be implemented by other conductive structures as long as it is ensured that the third sliding block is always electrically connected to the conductive structure during sliding process. For example, an electric brush may be disposed on the third sliding block, and the electric brush is always in contact with the surface of the conductive sliding rail; alternatively, the conductive structure may include a spring; the spring may be disposed at a position where the third sliding block is electrically connected to the conductive sliding rail; one end of the spring is fixedly connected to the third sliding block and always in a compressed state.

It can also be appreciated that in other embodiments, the conductive sliding rail may not be provided, i. e., the third sliding block is directly connected to the conductive interface at the proximal end of the housing via the conductive structure.

In the embodiments, the configuration of a limiting structure for limiting the elongated member to prevent the elongated member from buckling, an opening on the housing for limiting the axial movement range of the manipulation portion, and an elastic member and a ball for prompting the movement in place, a conductive structure for ensuring that the third manipulation portion is always powered on during the movement is to ensure that the neostomy apparatus is valid in each operation process of the neostomy apparatus in use, such that the grasping device may successfully grasp the tissue, and the cutting device may also successfully cut the tissue.

Each feature of the above embodiments may be in any combination. To make the description concise, all the possible combinations of each feature in the above embodiments are not described one by one. However, any combination of these features shall fall within the scope of the embodiments as long as there is no contradiction therebetween.

The above examples are merely illustrative of several embodiments of the embodiments, and are described in greater detail, but are not construed as limiting the embodiments. It is understood that any person skilled in the art may further make several variations and modifications within the concept of the embodiments, and these variations and modifications fall within the scope of the embodiments.