Device for visible puncture

A device for visible puncture includes a balloon, a canula, a needle tube, an image acquisition device, and a fluid injection tube. The balloon includes a first end including a first hole, and a second end including a second hole. The canula includes a first axial through hole. The needle tube includes a second axial through hole and is disposed in the first axial through hole. The image acquisition device is disposed in the second axial through hole. The balloon is axially disposed on the canula. The first end of the balloon is disposed on the outer wall of the front end of the needle tube, and the second end of the balloon is disposed on the outer wall of the front end of the canula. The second axial through hole includes a fluid channel disposed between the outer wall of the needle tube and the canula.

BACKGROUND

The disclosure relates to a device for visible puncture.

A conventional device for puncture comprises a puncture needle, a guide wire, and a sheath. When in use, the puncture needle is first guided to, for example, renal pelvis or calyces of a patient, and then the needle core of the puncture needle is withdrawn. Observe whether there is a urine on the needle core to judge the success or failure of the puncture operation. If not, the puncture operation is repeated. If so, the needle core is removed and the sheath is inserted to produce a channel, and the guide wire is introduced to the operation site through the channel. Thereafter, the guide wire is stabilized, the sheath is withdrawn, and a balloon is introduced to the renal pelvis or calyces of the patient along the guide wire. The balloon is filled with normal saline via an external water injection tube and an external syringe. The use of the device is time-consuming, inefficient, and costly.

SUMMARY

The disclosure provides a device for visible puncture, the device comprising a balloon, a canula, a needle tube, an image acquisition device, and a fluid injection tube. The balloon comprises a first end comprising a first hole, and a second end comprising a second hole. The canula comprises a first axial through hole. The needle tube comprises a second axial through hole and is disposed in the first axial through hole. The image acquisition device is disposed in the second axial through hole. The balloon is axially disposed on the canula; the first end of the balloon is disposed on an outer wall of a front end of the needle tube, and the second end of the balloon is disposed on an outer wall of a front end of the canula; a rear end of the canula is in conjunction with the outer wall of the needle tube; the second axial through hole comprises a fluid channel disposed between the outer wall of the needle tube and an inner wall of the balloon, and between the outer wall of the needle tube and an inner wall of the canula. The fluid injection tube is connected to the fluid channel.

In a class of this embodiment, the device further comprises a water injection tube communicating with the second axial through hole; the image acquisition device comprises a first outer wall facing the water injection tube and a second outer wall back to back with the first outer wall; a first channel is disposed between an inner wall of the needle tube and the first outer wall of the image acquisition device; and the first channel communicates with the water injection tube.

In a class of this embodiment, the device further comprises an instrument delivery pipe communicating with the second axial through hole and facing the second outer wall; the water injection tube and the instrument delivery pipe are disconnected in the second axial through hole; a second channel is disposed between the inner wall of the needle tube and the second outer wall of the image acquisition device; and the second channel communicates with the instrument delivery pipe.

In a class of this embodiment, the device further comprises a handle; the rear end of the canula and a rear end of the needle tube are fixed in the handle; the handle comprises a first cylindrical holder, a second cylindrical holder coaxially fixed on the first cylindrical holder, and a tapered holder coaxially fixed on the second cylindrical holder; a diameter of the second cylindrical holder is larger than a diameter of the first cylindrical holder; a transition section of the second cylindrical holder and the tapered holder comprises a clamping part shaped like a finger; and the tapered holder comprises a rear end having an annular circumferential surface.

In a class of this embodiment, the fluid injection tube comprises a first front end fixed in the handle, and a first rear end comprising a first joint for fluid injection; the water injection tube comprises a second front end fixed in the handle, and a second rear end comprising a second joint for water injection; the instrument delivery pipe comprises a third front end fixed in the handle, and a third rear end comprising a third joint for instrument introduction; and the rear end of the needle tube is connected to a fourth joint communicating with the image acquisition device.

In a class of this embodiment, the image acquisition device comprises a first end fixed on the inner wall of the needle tube, and a second end passing through the fourth joint.

In a class of this embodiment, the balloon comprises a first welding part and a second welding part fixed on the outer wall of the front end of the needle tube and the outer wall of the front end of the canula, respectively.

In a class of this embodiment, the device further comprises a sheath disposed on the balloon; the sheath comprises a third axial through hole; when the balloon is filled with a fluid and expanded to show a maximum section width, and the maximum section width is smaller than an inner diameter of the sheath.

In a class of this embodiment, a radial section of the balloon is circular, and an axial section of the balloon comprises a rectangular center and two circular ends.

In a class of this embodiment, the front end of the needle tube comprises a tapered head; the tapered head comprises a tapered front end and a flat rear end; the tapered head further comprises a central hole communicating with the second axial through hole and the central hole has the same diameter as the second axial through hole; the first end of the balloon is fixed on the flat rear end of the tapered head, and an outer diameter of the flat rear end of the tapered head is the same as an outer diameter of the first end of the balloon.

DETAILED DESCRIPTION

To further illustrate the disclosure, embodiments detailing a device for visible puncture are described below. It should be noted that the following embodiments are intended to describe and not to limit the disclosure.

As shown inFIGS.1-6, the disclosure provides a device for visible puncture comprising a balloon1, a canula2, and a water inlet tube (a fluid injection tube11). A needle tube4is disposed in the needle tube4. The balloon comprises a first end comprising a first hole and a second end comprising a second hole.

The balloon1comprises a first welding part16and a second welding part17fixed on the outer wall of the front end of the needle tube4and the outer wall of the front end of the canula2, respectively. The rear end of the needle tube4passes through the canula2. The rear end of the canula2is in conjunction with the outer wall of the needle tube4. A fluid channel is disposed between the outer wall of the needle tube4and the inner wall of the balloon1, and between the outer wall of the needle tube4and the inner wall of the canula2. A fluid injection tube11is connected to the fluid channel. The fluid injection tube11comprises a first joint3for fluid injection. The canula2comprises a first axial through hole. The needle tube4comprises a second axial through hole6. The needle tube4is disposed in the first axial through hole. An image acquisition device5(fiber scope, for example) is disposed in the second axial through hole6. The second axial through hole6is connected to a water injection tube7. The water injection tube7is connected to a second joint8for water injection. An instrument delivery pipe19(a guide wire pipe, for example) is connected to the second axial through hole6. The water injection tube7and the instrument delivery pipe19are disconnected in the second axial through hole. The image acquisition device5comprises a first outer wall facing the water injection tube and a second outer wall back to back with the first outer wall; a first channel13is disposed between an inner wall of the needle tube and the first outer wall of the image acquisition device5; and the first channel13communicates with the water injection tube7. A second channel21is disposed between the inner wall of the needle tube and the second outer wall of the image acquisition device5; and the second channel21communicates with the instrument delivery pipe19. The device for visible puncture further comprises a handle10. The instrument delivery pipe19comprises a third front end fixed in the handle10, and a third rear end comprising a third joint20for instrument introduction. The rear end of the needle tube4is connected to a fourth joint9communicating with the image acquisition device5. As shown inFIG.6, the front end of the needle tube4comprises a tapered head4.1; the tapered head4.1comprises a tapered front end and a flat rear end; the tapered head4.1further comprises a central hole communicating with the second axial through hole6and the central hole has the same diameter as the second axial through hole6; the first end of the balloon is fixed on the flat rear end of the tapered head4.1, and an outer diameter of the flat rear end of the tapered head4.1is the same as an outer diameter of the first end of the balloon1. The tapered head4.1is a part of the needle tube4or is soldered on the needle tube4.

In certain embodiments, the fiber scope (the image acquisition device) is integrated with or independent from the needle tube4. When the fiber scope is integrated with the needle tube4, the front end of the image acquisition device5is fixed on the inner wall of the needle tube, and the rear end passes through the second axial through hole6and the fourth joint9. There is a gap between the fiber scope and the water outlet of the water injection tube7. When the fiber scope is independent from the needle tube, when in use, the fiber scope is inserted into the needle tube4via the fourth joint9to observe the puncture position, and pull out after the operation.

As shown inFIGS.2-6, the rear end of the canula2and the rear end of the needle tube4are fixed in the handle10. The rear end of the needle tube4passes through the handle10and is connected to the fourth joint9. One end of the fluid injection tube11is connected to the canula2, and the other end passes through the handle and is connected to the first joint. One end of the water injection tube7is connected to the needle tube4, and the other end passes through the handle and is connected to the second joint8.

In certain embodiments, the handle comprises a first cylindrical holder10.1, a second cylindrical holder10.2coaxially fixed on the first cylindrical holder, and a tapered holder10.3coaxially fixed on the second cylindrical holder; a diameter of the second cylindrical holder is larger than a diameter of the first cylindrical holder; a transition section of the second cylindrical holder and the tapered holder10.3comprises a clamping part14shaped like a finger (this is convenient for a user to hold the device); and the tapered holder10.3comprises a rear end having an annular circumferential surface15(this is convenient for the operator to hold, increasing the friction force of hands, thus ensuring the stable operation of the medical staff).

The usage method of the device for visible puncture is described as follows:1) The fiber scope is inserted into the second axial through hole6and locked in a target location. The sheath18is disposed on the needle tube4(if the fiber scope is integrated with the needle tube4, only need to dispose the sheath on the needle tube4). The sheath18is a hollow pipe; when the balloon1is filled with a fluid and expanded to show a maximum section width, and the maximum section width of the balloon1is smaller than the inner diameter of the sheath18.2) The optical fiber of the fiber scope is connected to a camera system until a normal image can be seen on the display.3) The device for visible puncture is held by hand. Under B-ultrasound equipment, the needle tube4, the balloon1, and canula2cooperate with each other for puncture. The needle tube4reaches the renal pelvis and renal calices through the epidermis. The renal collection system can be seen on the optical fiber mirror. If the imaging is not clear, a small amount of physiological saline can be injected into the needle tube4through the second joint8to clear the vision so as to determine the puncture position of the renal collection system.4) When the needle tube4reaches the target position, normal saline is injected into the balloon1through a water filling connector to expand the balloon1using a syringe. When the pressure on the syringe reaches the set pressure (25 atmospheres), stop filling water and hold for 30 seconds. The sheath18is pushed forward along the needle tube4and sheathed on the balloon1. Thereafter, the water in the balloon1is drained and the balloon is taken out. Thus, the sheath18stays in an expanded channel completed by the balloon1, so that the expanded state is remained, that is to say, the working channel of percutaneous renal surgery is established.

In 3), when the needle tube4reaches the target position, the guide wire is introduced into the second axial through hole6via the third joint20and the instrument delivery pipe19. After 4) is completed, only the sheath18and the guide wire are remained, and other parts are pulled out. The guide wire is used for introduction of subsequent surgical instruments.

The device for visible puncture incorporates the needle tube4and the balloon1, and the fiber scope is built-in in the device or introduced temporarily as needed. Using the device, the puncture position can be clearly observed thus improving the operation accuracy. Compared with a convention puncture device which involves the withdrawal of the puncture needle, the placement and stabilization of the guide wire, the withdrawal of the sheath of the puncture needle, the expansion of the sheath core along the guide wire, and the withdrawal of the sheath core, the operation of the device of the disclosure is simple. The operations of the puncture and the expansion are fulfilled in the same device, without the operations of withdrawal or replacement of the guide wire, thus saving the usage of consumable items, reducing the operation time, reducing the risk of surgery, reducing the cost of surgery, and reducing the pain of patients. During the expansion process, the state of the renal collection system can be monitored through the fiber optic mirror to reduce the risk of bleeding. The device of the disclosure can be applied in general surgery, neurosurgery, urology, hepatobiliary surgery, gynecology and so on.