Patent Description:
As the optical technology is developed and various laparoscopic devices are rapidly developed, many operations depending on laparotomy in the past have been replaced with laparoscopic surgery. Laparoscopic surgery, which is an operation of minimally opening the stomach of a patient, inserting various surgical instruments including a surgical camera, and performing an operation while observing the inside the abdominal cavity, has an advantage that it causes less complications such as bleeding, infection, adhesion, etc. after an operation, has an effect in terms of beauty because it cuts a small part, and reduces the hospitalization because of less pain and quick recovery after an operation.

According to the procedure of laparoscopic surgery, an operator inserts a needle into a portion around the navel of a patient after the patient is anesthetized, and then injects carbon dioxide into the abdominal cavity to inflate the abdominal cavity. Thereafter, the operator bores a necessary number of port sites at appropriate positions. The operator inserts a camera through a laparoscopic trocar, whereby the image of the inside of the abdominal cavity is shown through a monitor provided in front of the operator and the operator performs a desired operation using appropriately surgical instruments while looking at the monitor.

Meanwhile, when operating devices such as a laser, an electrosurgical unit, an ultrasonic cutting machine in laparoscopic surgery, a lot of noxious gas is produced during the operation. Such gas obstructs the view of an operator and is malodorous, and may contain chemical and pathological noxious particles such as carbon oxide, carbon dioxide, bacteria, and virus. Accordingly, a gas filter apparatus for removing such gas is disposed in the exhaust tube of laparoscopic trocars to secure safety of an operator against such gas. However, since moisture is contained in the gas that is discharged to the gas filter apparatus, the moisture condenses due to the temperature difference between the inside and the outside of the body when the gas is discharged out of the body. When the water permeates into the gas filter apparatus, the performance of the filter is deteriorated.

From CA <NUM><NUM><NUM> C a medical fluid filter system is known comprising a housing having: a liquid trap chamber having a volume; a filter media chamber; a filter media arranged within the filter media chamber; the liquid trap chamber having a liquid trap outlet port in fluid communication with the filter media chamber; the liquid trap outlet port configured and arranged within the liquid trap chamber to inhibit flow of liquid from the liquid trap chamber to the filter media chamber and configured and arranged to allow gas to flow from the liquid trap chamber to the filter media chamber; a filter system inlet passing through the housing for intake of fluid originating from a surgical site; and a filter system outlet passing through the housing for fluid exhaust.

From <CIT> a surgical gas delivery system is known that includes a device housing supporting a control unit and a filter interface having a seat for receiving a filter cartridge, the filter cartridge having a filter housing defining an interior reservoir, wherein sensors are coupled to the control unit for sensing a level of liquid within the reservoir of the filter cartridge to prevent contamination of the device.

From <CIT> a filter is known including (i) a filter body, (ii) a front cap associated with a first end of the filter body and coupled to and receiving smoke from a vacuum hose, (iii) a back cap associated with a second end of the filter body and having a filter exhaust sized and shaped to associate with and communicate suction from a smoke evacuation system, (iv) a compressed carbon reservoir disposed within the filter body between the front cap and the back cap, and (v) a flexible porous barrier disposed on at least a first side of the compressed carbon reservoir.

In order to solve the problems in the related art, an objective of the present invention is to provide a smoke evacuation device with fluid storage for laparoscopic surgery, the smoke evacuation device with fluid storage being able to keep moisture so that gas produced in the process of laparoscopic surgery can be filtered out, as defined in independent claim <NUM>.

In order to achieve the objectives of the present invention, a smoke evacuation device with fluid storage for laparoscopic surgery, which is coupled to an exhaust part of a laparoscopic trocar that is inserted into a human body in laparoscopic surgery, includes: a main body having an empty space and having an intake port formed through a first side thereof to be connected with the exhaust part and a discharge port formed through a second side; and a filter disposed at a first side in the main body, in which a first guide pipe through which fluid flowing into the intake port flows to a second side in the main body and a second guide pipe formed along an outer surface of the first guide pipe are disposed in the main body, and when fluid is guided into the main body by the first guide pipe, moisture in the fluid is kept in the main body and gas in the fluid moves toward the filter through a space between the first guide pipe and the second guide pipe, is filtered out, and is then discharged through the discharge port.

The space in the main body may include a first space that communicates with the intake port, a second space that is disposed at a first side of the first space to communicate with the discharge port and in which the filter is disposed, a third space that is positioned between a second side of the first space and the second space, a second guide hole may be formed at the first side of the first space toward the second space, and a first guide hole may be formed at the second side of the first space toward the third space; the first guide pipe may have a first side connected to the intake port and a second side extending through the first guide hole to be positioned in the third space and has a diameter smaller than the first guide hole; and the second guide pipe may have a first side connected to an inner edge of the first guide hole and a second side extending along the outer surface of the first guide pipe to be positioned in the third space.

A first partition may be formed between the first side of the first space and the second space, a second partition may be formed between the second space and the third space, and a third partition may be formed between the third space and the first space; the second guide hole may be formed through the first partition wall and the first guide hole is formed through the third partition; and fluid guided into the third space through the intake port and the first guide pipe from the exhaust part of the laparoscopic trocar may move through a space between the first guide pipe and the second guide pipe and then may be guided into the first space through the first guide pipe, the fluid guided into the first space may move into the second space through the second guide hole, and gas of the fluid guided into the second space may be filtered out by the filter disposed in the second space and then discharged through the discharge port.

The second guide pipe may have: a funnel portion has: a funnel portion connected to the inner edge of the first guide hole and protruding from the first guide hole such that a width thereof decreases as it goes away from the first guide hole; and an outer extension extending from an end of the funnel portion toward an end of the second guide pipe.

An end of the first guide pipe may protrude further than an end of the second guide pipe.

An end of the first guide pipe and an end of the second guide pipe may not be in contact with an inner side of the third space.

The first guide pipe and the second guide pipe may be spaced apart from a bottom side, which faces the ground, of the inner side of the third space.

The first guide pipe and the second guide pipe may be in parallel with the bottom side.

The intake port may be disposed higher than the first guide hole, and the first guide pipe may have an inclined portion having a first side connected to the intake port and a second side inclined downward toward the first guide hole, and an inner extension extending from the second side of the inclined portion and spaced apart from the bottom side.

A diameter of the inclined portion may increase from the first side thereof positioned at the intake port to the second side thereof positioned at the first guide hole.

The smoke evacuation device with fluid storage may further include a door member adjusting an opening area of the discharge port.

An edge part may protrude outward from the main body along an inner edge of the discharge part; an inner edge of the edge part may have a first inner edge, a second inner edge, and a third inner edge sequentially positioned away from the second space; a blocking portion may be formed to close a first side of the first inner edge and an opening portion may be formed to open a second side of the first edge; a pair of guide rails may be formed at both sides in a longitudinal direction of the second inner edge, the blocking portion may be positioned between first sides of the pair of guide rails, and the opening portion may be positioned between second sides of the pair or guide rails; a cover portion may be formed to cover the third inner edge, a slit may be formed in a longitudinal direction of the cover portion, a first side of the slit may be positioned to face the blocking portion, and a second side of the slit may be positioned to face the opening portion; a first side of the door member may have an area being able to close the opening portion and may slide along the guide rails, and a second side of the door member may protrude out of the edge part through the slit; and when the second side of the door member slides along the slit, the first side of the door member may adjust an opening area of the opening portion while moving along the guide rail.

A cover plate may be formed to cover an inner edge of the discharge port; a through-hole may be formed through a first side, which faces the blocking portion, of the cover plate; the first side of the cover plate which faces the blocking portion may be positioned away from the second guide hole further than a second side of the cover plate; and a first side of the filter may be positioned to cover the second guide hole and a second side of the filter may be positioned to face the through-hole.

The intake port and the first guide hole may be positioned to face each other and the first guide hole may have a larger diameter than the intake port.

The second space may include a first internal space that communicates with the second guide hole, a second internal space that communicates with the discharge port, and a third internal space that is positioned between the first internal space and the second internal space, in which a first internal partition may be formed between the first internal space and the second internal space, a second internal partition may be formed between the second internal space and the third internal space, and a third internal partition may be formed between the second internal space and the first internal space; a first internal hole may be formed through the third internal partition and a second internal hole may be formed through the second internal partition; the filter may be disposed in the first internal space; the smoke evacuation device with fluid storage may further include a door member adjusting an opening area of the first internal hole; and gas of fluid moving into the first internal space through the second guide hole may be filtered out by the filter and then may move into the third internal space through the first internal hole, the gas moving into the third internal space may move into the second internal space through the second internal hole, and the gas moving into the second internal space may be discharged to the discharge port.

The door member may have: a rotary shaft mounted on a first side of the third internal partition, a rotary plate formed in a plate shape to cover the first internal hole, having the rotary shaft inserted in a center thereof, and having an opening hole at a first side, and a knob having a first side connected to the rotary shaft and a second side disposed outside the main body through the main body; and the opening hole may be moved to face or not to face the first internal hole by rotation of the knob, whereby the first internal hole may be opened or closed.

The opening hole may be formed in an arch shape along a rotational circumference of the rotary plate such that a width increases from a first side to a second side; and a size opened to the outside of the first internal hole when the first side of the opening hole is positioned to face the first internal hole may be larger than a size opened to the outside of the first internal hole when the second side of the opening hole is positioned to face the first internal hole.

The discharge port may be positioned at an upper portion of the main body and the intake port may be positioned lower than the discharge port, so gas guided into the main body through the intake port may be manually discharged to the discharge port.

Gas discharged to the discharge portion from the inside of the main body may be automatically discharged by a suction device disposed at the discharge port and suctioning fluid.

According to the present invention, water produced in the third space cannot flow back into the second guide plate due to condensation of fluid flowing into the third space, so the performance of the filter is not deteriorated and the filter can easily filter gas flowing into the main body.

Further, since the end of the inner extension protrudes further than the end of the outer extension, water of fluid dropping into the third space from the inner extension does not flow back into the outer extension.

Further, since the funnel portion increases in diameter as it goes away from the outer extension, gas guided into the funnel portion through the outer extension is guided into the first space without a bottleneck.

Further, since the cover plate supports a side of the filter, the filter can be formed large regardless of the size of the discharge port.

Further, since the first guide pipe is inclined downward, moisture contained in fluid flowing inside through the intake port easily flows down to the inner extension along the inclined portion.

The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description when taken in conjunction with the accompanying drawings, in which:.

Hereafter, the smoke evacuation device with fluid storage for laparoscopic surgery according to exemplary embodiments of the present invention are described in detail with reference to the accompanying drawings.

<FIG> is a view schematically showing the front of a smoke evacuation device with fluid storage for laparoscopic surgery according to a first embodiment of the present invention and <FIG> is a view schematically showing the rear of the smoke evacuation device with fluid storage for laparoscopic surgery according to the first embodiment of the present invention.

Referring to <FIG> and <FIG>, a smoke evacuation device with fluid storage <NUM> for laparoscopic surgery according to a first embodiment of the present invention is, for example, coupled to an exhaust part (not shown) of a laparoscopic trocar that is inserted into a human body to filter various gases receiving from the exhaust part of the laparoscopic trocar, and includes a main body <NUM>, a filter <NUM> (shown in <FIG>), and a door member <NUM>.

The main body <NUM> has an empty space therein and is formed in a substantially hexahedral shape. The main body <NUM> has a top <NUM>, a bottom <NUM> spaced down apart from the top <NUM>, and a side wall <NUM> integrally connecting the top <NUM> and the bottom <NUM>. An intake port <NUM> that is connected to an exhaust part is formed though a first side of the side wall <NUM> and a connecting protrusion 121a is formed at the intake port <NUM> for easy connection to the exhaust part. A coupling portion <NUM> for fastening the main body <NUM> at a specific position in an operating room, etc. is disposed on a second side of the side wall <NUM>. A discharge port <NUM> (shown in <FIG>) for discharging gas flowing in the main body <NUM> from the exhaust part of a laparoscopic trocar is formed through the top <NUM>. An edge part <NUM> is formed along the inner edge of the discharge port <NUM> and protrudes outward from the main body <NUM>. A cover portion <NUM> is formed to cover the edge part <NUM> and a slit 169a is formed in the longitudinal direction of the cover portion <NUM>. The door member <NUM> adjusts the opening area of the discharge port <NUM> by sliding in the slit 169a.

<FIG> is a view schematically showing the inside of the main body of the smoke evacuation device with fluid storage for laparoscopic surgery according to the first embodiment of the present invention and <FIG> is a view showing an A-A' cross-section of <FIG>.

Referring to <FIG>, the internal space of the main body <NUM> includes a first space <NUM> that communicates with the intake port <NUM>, a second space <NUM> that communicates with the discharge port <NUM> and in which a filter <NUM> is disposed, and a third space <NUM> that is positioned between the first space <NUM> and the second space <NUM>. The first, second, and third spaces <NUM>, <NUM>, and <NUM> are independently separated, and to this end, a first partition <NUM> is formed between the first space <NUM> and the second space <NUM>, a second partition <NUM> is formed between the second space <NUM> and the third space <NUM>, and a third partition <NUM> is formed between the third space <NUM> and the first space <NUM>. A second guide hole 130a is formed through the first partition <NUM> and a first guide hole 134a is formed through the third partition <NUM>. The intake port <NUM> has a first guide pipe <NUM> and a second guide pipe <NUM> is formed at the first guide hole 134a.

A first side of the first guide pipe <NUM> is connected to the inner edge of the intake port <NUM> and a second side thereof is extended and positioned in the third space <NUM> through the first guide hole 134a. The first guide pipe <NUM> is smaller in diameter than the first guide hole 134a. The intake portion1 <NUM> is positioned higher than the first guide hole 134a, so the first guide pipe <NUM> has an inclined portion <NUM> having a first side connected to the intake port <NUM> and a second side inclined downward to the first guide hole 134a, and an inner extension <NUM> extending from the second side of the inclined portion <NUM> and spaced apart from the bottom <NUM>. Since the first guide pipe <NUM> is inclined downward, moisture contained in the fluid flowing inside through the intake port easily flows into the inner extension <NUM> through the inclined portion <NUM>. The diameter of the inclined portion <NUM> increases toward the second side thereof disposed in the first guide hole 134a from the first side thereof positioned in the intake port <NUM>. Since the inclined portion <NUM> gradually increases in diameter, gas and moisture easily flow from the inclined portion <NUM> to the inner extension <NUM> without a bottleneck.

The second guide pipe <NUM> has a first side connected to the inner edge of the first guide hole 134a and a second side extended along the outer surface of the first guide pipe <NUM> and positioned in the third space <NUM>. The second guide pipe <NUM> is larger in diameter than the first guide pipe <NUM> such that the first guide pipe <NUM> is positioned inside the second guide pipe <NUM>. The second guide pipe <NUM> has a funnel portion <NUM> connected to the inner edge of the first guide hole 134a and protruding from the first guide hole 134a in a cone shape of which the width decreases as it goes away from the first guide hole 134a, and an outer extension <NUM> extending from the end of the funnel portion <NUM> to the end of the second guide pipe <NUM>.

Gas guided from the exhaust part of a laparoscopic trocar into the third space <NUM> through the intake port <NUM> and the first guide pipe <NUM> moves through the space between the first guide pipe <NUM> and the second guide pipe <NUM> and is then guided into the first space <NUM> through the first guide hole 134a. The end of the inner extension <NUM> protrudes further than the end of the outer extension <NUM>, so there is an effect that moisture dropping into the third space <NUM> through the inner extension <NUM> does not flow back into the outer extension <NUM>. Since the water produced in the third space <NUM> cannot flow back into the second guide pipe <NUM>, the performance of the filter <NUM> is not influenced by the water in the third space <NUM>, so there is an effect that the filter <NUM> can easily filter the gas flowing in the main body <NUM>. Since the funnel portion <NUM> increases in diameter as it goes away from the outer extension <NUM>, there is an effect that gas that is guided to the funnel portion <NUM> through the outer extension <NUM> is easily guided into the first space <NUM> without a bottleneck.

The end of the first guide pipe <NUM> and the end of the second guide pipe <NUM> are not in contact with the inner side of the third space <NUM>. Accordingly, there is an effect in terms of structure that the moisture dropping into the third space <NUM> cannot flow back into the end of the first guide pipe <NUM> or the end of the second guide pipe <NUM>. Further, according to the present invention, the first guide pipe <NUM> and the second guide pipe <NUM> may be spaced apart from the bottom side 124a, which faces the ground, of the inner side of the third space <NUM>. The first guide pipe <NUM> and the second guide pipe <NUM> may be in parallel with the bottom side 124a. Accordingly, there is an effect foreign substances such as water dropping down to the bottom side 124a through the first guide pipe <NUM> and accumulated in the third space <NUM> cannot flow back into the second guide pipe <NUM>.

The third space <NUM> has a large volume to be able to keep a sufficient amount of water. However, since the first space <NUM> connects the third space <NUM> and the second space <NUM>, the first space <NUM> may be smaller than the second space <NUM> and the third space <NUM>.

<FIG> is a view schematically showing the state in which a door member is coupled to an edge part in the smoke evacuation device with fluid storage for laparoscopic surgery according to the first embodiment of the present invention.

Referring to <FIG>, the filter <NUM> is disposed in the second space <NUM>. Gas guided into the first space <NUM> moves into the second space <NUM> through the second guide hole 130a. The gas guided into the second space <NUM> is filtered out by the filter <NUM> disposed in the second space <NUM> and then discharged through the discharge port <NUM>. The door member <NUM> is coupled to the edge part <NUM> to adjust the opening area of the discharge port <NUM>.

The inner edge of the edge part <NUM> has a first inner edge 160a, a second inner edge 160b, and a third inner edge 160c that are positioned sequentially away from the second space <NUM>. A blocking portion <NUM> is formed to close a first side of the first inner edge 160a and an opening portion <NUM> is formed to open a second side of the first inner edge 160a. A pair of recessed guide rails <NUM> is formed at both sides in the longitudinal direction of the second inner edge 160b, the blocking portion <NUM> is positioned between first sides of the pair of guide rails <NUM>, and the opening portion <NUM> is positioned between second sides of the pair or guide rails <NUM>. A cover portion <NUM> is formed to close the third inner edge 160c, a slit 169a is formed in the longitudinal direction of the cover portion <NUM> and has a first side facing the blocking portion <NUM> and a second side facing the opening portion <NUM>.

A first side of the door member <NUM> has an area being able to close the opening portion <NUM> and can slide in the guide rails <NUM> and a second side of the door member <NUM> protrudes out of the edge part <NUM> through the slit 169a. When a user holds and slides the second side of the door member <NUM> along the slit 169a, the first side of the door member <NUM> moves along the guide rails <NUM>, whereby the opening area of the opening portion <NUM> is adjusted. That is, when the first side of the door member <NUM> is positioned to face the opening portion <NUM>, the opening portion <NUM> is closed, so gas discharged through the discharge port <NUM> cannot be discharged out of the second space <NUM>. On the contrary, when the first side of the door member <NUM> is moved to the blocking portion <NUM> and the opening portion <NUM> is opened to the slit 169a, the gas discharged through the discharge port <NUM> is discharged out of the second space <NUM>.

The size of the filter <NUM> disposed in the second space <NUM> may be limited, depending on the size of the discharge port <NUM>. That is, gas flows into the filter <NUM> through a longitudinal first end of the filter <NUM> and the gas flowing in the filter <NUM> is filtered out while moving through the filter <NUM> and is then discharged through a second end of the filter <NUM>. Accordingly, the discharge port <NUM> should be positioned close to the second end of the filter <NUM>. However, according to the present invention, the door member <NUM> can move over the discharge port <NUM>, the size of the discharge port <NUM> should be as large as the movable displacement of the door member <NUM>. This acts as a reason that limits the size of the filter <NUM>.

In order to solve the problem in the present invention, a cover plate <NUM> is formed to cover the inner edge of the discharge port <NUM>, a through-hole 162a is formed through a first side, which faces the blocking portion <NUM>, of the cover plate <NUM>. Further, the first side of the cover plate <NUM> which faces the through-hole 162a is positioned away from the second guide hole 130a further than a second side of the cover plate <NUM>. A first end of the filter <NUM> is positioned to cover the second guide hole 130a and a second end of the filter <NUM> is positioned to face the through-hole 162a. Since a side of the filter <NUM> is supported by the cover plate <NUM>, there is an effect that the filter <NUM> can be formed large regardless of the size of the discharge port <NUM>.

Hereafter, the operation of the smoke evacuation device with fluid storage for laparoscopic surgery according to the first embodiment of the present invention is described.

<FIG> is a view schematically showing the flowing path of fluid that flows into the smoke evacuation device with fluid storage for laparoscopic surgery according to the first embodiment of the present invention.

Referring to <FIG>, the exhaust part (not shown) of a laparoscopic trocar and the connecting protrusion 121a are connected to each other by a connecting tube (not shown). In this state, a user slides the door member <NUM> to the blocking portion <NUM> to open the opening portion <NUM>. Accordingly, fluid flowing into the intake port <NUM> through the connecting protrusion 121a is guided into the third space <NUM> through the first guide pipe <NUM>. Moisture contained in the fluid and water produced by condensation due to a temperature difference are kept in the third space <NUM>. Gas moving into the third space <NUM> moves through the space between the first guide pipe <NUM> and the second guide pipe <NUM> and is then guided into the first space <NUM> through the first guide hole 134a. The gas guided into the first space <NUM> moves into the second space <NUM> through the second guide hole 130a. The gas guided into the second space <NUM> is filtered out by the filter <NUM> disposed in the second space <NUM> and then discharged outside sequentially through the through-hole 162a and the opening portion <NUM>.

As described above, since the water produced in the third space <NUM> due to condensation of the fluid flowing in the third space <NUM> cannot flow back into the second guide pipe <NUM>, the performance of the filter <NUM> is not deteriorated, so the filter <NUM> can easily filter the gas flowing in the main body <NUM>.

<FIG> is a view schematically showing a smoke evacuation device with fluid storage for laparoscopic surgery according to a second embodiment of the present invention.

Referring to <FIG>, a smoke evacuation device with fluid storage <NUM> for laparoscopic surgery according to a second embodiment of the present invention includes a main body <NUM>, a filter <NUM> (shown in <FIG>), and a door member <NUM>.

The main body <NUM> has an empty space therein and has a top <NUM>, a bottom <NUM> spaced down apart from the top <NUM>, and a side wall <NUM> integrally connecting the top <NUM> and the bottom <NUM>. An intake port <NUM> for connection with an exhaust part (not shown) of a laparoscopic trocar is formed through a first side of the side wall <NUM> and a connecting protrusion 221a is formed at the intake port <NUM>. A discharge port <NUM> for discharging gas flowing in the main body <NUM> to the outside is formed through a second side of the side wall <NUM>. The door member <NUM> is rotatably disposed on the top <NUM> and the amount of gas that is discharged out of the main body <NUM> depends on the rotation angle of the door member <NUM>.

<FIG> is a view schematically showing a cross-section of the smoke evacuation device with fluid storage for laparoscopic surgery according to the second embodiment of the present invention.

Referring to <FIG>, the internal space of the main body <NUM> includes a first space <NUM> that communicates with the intake port <NUM>, a second space that communicates with the discharge port <NUM> and in which the filter <NUM> is disposed, and a third space <NUM> that is positioned between the first space <NUM> and the second space <NUM>. The first, second, and third spaces <NUM>, <NUM>, and <NUM> are independently separated, and to this end, a first partition <NUM> is formed between the first space <NUM> and the second space <NUM>, a second partition <NUM> is formed between the second space <NUM> and the third space <NUM>, and a third partition <NUM> is formed between the third space <NUM> and the first space <NUM>. A second guide hole 230a is formed through the first partition <NUM> and a first guide hole 234a is formed through the third partition <NUM>. The first guide hole 232a and the intake port <NUM> face each other. The first guide hole 234a has a diameter larger than the intake port <NUM>. The intake port <NUM> has a first guide pipe <NUM> and a second guide pipe <NUM> is formed at the first guide hole 234a.

A first side of the first guide pipe <NUM> is connected to the inner edge of the intake port <NUM> and a second side thereof is extended and positioned in the third space <NUM> through the first guide hole 234a. The first guide pipe <NUM> is smaller in diameter than the first guide hole 234a.

The second guide pipe <NUM> has a first side connected to the inner edge of the first guide hole 234a and a second side extended along the outer surface of the first guide pipe <NUM> and positioned in the third space <NUM>. The second guide pipe <NUM> is larger in diameter than the first guide pipe <NUM> such that the first guide pipe <NUM> is positioned inside the second guide pipe <NUM>.

Gas guided from the exhaust part of a laparoscopic trocar into the third space <NUM> through the intake port <NUM> and the first guide pipe <NUM> moves through the space between the first guide pipe <NUM> and the second guide pipe <NUM> and is then guided into the first space <NUM> through the first guide hole 234a.

The end of the first guide pipe <NUM> and the end of the second guide pipe <NUM> are not in contact with the inner side of the third space <NUM>. The longitudinal sides of the first guide pipe <NUM> and the second guide pipe <NUM> are spaced apart from a bottom side 224a of the third space <NUM> in parallel with the bottom side 224a, so there is an effect that foreign substances such as water dropping to the bottom side 224a from the first guide pipe <NUM> and kept in the third space <NUM> cannot flow back into the second guide pipe <NUM>.

<FIG> is a cross-sectional view schematically showing a B-B' cross-section of <FIG>.

Referring to <FIG>, the second space <NUM> includes a first internal space <NUM> that communicates with the second guide hole 230a, a second internal space <NUM> that communicates with the discharge port <NUM>, and a third internal space <NUM> that is positioned between the first internal space <NUM> and the second internal space <NUM>. A first internal partition <NUM> is formed between the first internal space <NUM> and the second internal space <NUM>, a second internal partition <NUM> is formed between the second internal space <NUM> and the third internal space <NUM>, and a third internal partition <NUM> is formed between the second internal space <NUM> and the first internal space <NUM>. A first internal hole <NUM> is formed through the third internal partition <NUM> and a second internal hole <NUM> is formed through the second internal partition <NUM>.

The filter <NUM> is disposed in the first internal space <NUM> and filters out gas flowing into the first internal space <NUM> through the second guide hole 230a. The gas filtered out by the filter <NUM> moves into the third space <NUM> through the first internal hole <NUM>. The door member <NUM> is provided to adjust the opening area of the first internal hole <NUM>.

The door member <NUM> has a rotary shaft <NUM> mounted on a first side of the third internal partition <NUM>, a rotary plate <NUM> formed in a plate shape to cover the first internal hole <NUM>, having the rotary shaft <NUM> inserted in the center thereof, and having an opening hole <NUM> at a first side, and a knob <NUM> having a first side connected to the rotary shaft <NUM> and a second side disposed outside the main body <NUM> through the main body <NUM>. The knob <NUM> is formed to be easily held and rotated by a user. The opening hole 284a is moved to face or not to face the first internal hole <NUM> by rotation of the knob <NUM>, whereby the first internal hole <NUM> is opened or closed. That is, when the rotary plate <NUM> is rotated by rotation of the knob <NUM> and a first side of the rotary plate <NUM> where the opening hole 284a is formed is positioned to face the first internal hole <NUM>, the first internal hole <NUM> is opened by the opening hole 284a. On the contrary, when a second side of the rotary plate <NUM> where the opening hole 284a is not formed is positioned to face the first internal hole <NUM>, the first internal hole <NUM> is closed by the second side of the rotary plate <NUM>.

The opening hole 284a is formed in an arch shape along the rotational circumference of the rotary plate <NUM>. The opening hole 284a increases in width from a first side to a second side. The first side of the opening hole 284a is smaller than the first internal hole <NUM> and the second side of the opening hole 284a is the same in size as the first internal hole <NUM>. Accordingly, when the first side of the opening hole 284a is positioned to face the first internal hole <NUM>, the size opened to the outside of the first internal hole <NUM> is smaller than the size of the entire first internal hole <NUM>. However, when the second side of the opening hole 284a is positioned to face the first internal hole <NUM>, the size opened to the outside of the first internal hole <NUM> is relatively large to corresponding to the size of the entire first internal hole <NUM>. Accordingly, the opening area of the first internal hole <NUM> is adjusted in accordance with the position of the opening hole 284a facing the first internal hole <NUM>.

Hereafter, the operation of the smoke evacuation device with fluid storage for laparoscopic surgery according to the second embodiment of the present invention is described.

<FIG> is a view schematically showing the flowing path of fluid that flows into the smoke evacuation device with fluid storage for laparoscopic surgery according to the second embodiment of the present invention and <FIG> is a cross-sectional view taken along line C-C' of <FIG>.

Referring to <FIG>, the exhaust part (not shown) of a laparoscopic trocar and the connecting protrusion 221a are connected to each other by a connecting tube (not shown). In this state, a user rotates the door member <NUM> to open the first internal hole <NUM> to the third internal space <NUM>.

Then, fluid flowing into the intake port <NUM> through the connecting protrusion 221a is guided into the third space <NUM> through the first guide pipe <NUM>. Moisture contained in the fluid and water produced by condensation due to a temperature difference are kept in the third space <NUM>. Gas moving into the third space <NUM> moves through the space between the first guide pipe <NUM> and the second guide pipe <NUM> and is then guided into the first space <NUM> through the first guide hole 234a. The gas of the fluid guided into the first space <NUM> moves to the first internal space <NUM> through the second guide hole 230a. The gas moving into the first internal space <NUM> through the second guide hole 230a is filtered out by the filter <NUM> and then moves to the third internal space <NUM> through the first internal hole <NUM>. The gas moving into the third space <NUM> moves to the second internal space <NUM> through the second internal hole <NUM>. The gas moving into the second internal space <NUM> is finally discharged to the discharge port <NUM>. The discharge port <NUM> has a discharge protrusion 223a and a suction device S that suctions gas is disposed at the discharge protrusion 223a, so the gas discharged to the discharge port <NUM> from the second internal space <NUM> is automatically discharged by the suction device S.

The invention may be summarized as follows:.

Claim 1:
A smoke evacuation device with fluid storage (<NUM>, <NUM>) for laparoscopic surgery that coupled to an exhaust part of a laparoscopic trocar that is inserted into a human body in laparoscopic surgery, the smoke evacuation device (<NUM>, <NUM>) comprising:
a main body (<NUM>, <NUM>) having an empty space and having an intake port (<NUM>, <NUM>) formed through a first side thereof to be connected with the exhaust part and a discharge port (<NUM>, <NUM>) formed through a second side; and
a filter (<NUM>, <NUM>) disposed at a first side in the main body (<NUM>, <NUM>),
wherein a first guide pipe (<NUM>, <NUM>) through which fluid flowing into the intake port (<NUM>, <NUM>) flows to a second side in the main body (<NUM>, <NUM>) and a second guide pipe (<NUM>, <NUM>) formed along an outer surface of the first guide pipe (<NUM>, <NUM>) are disposed in the main body (<NUM>, <NUM>), and when fluid is guided into the main body (<NUM>, <NUM>) by the first guide pipe (<NUM>, <NUM>), moisture in the fluid is kept in the main body (<NUM>, <NUM>) and gas in the fluid moves toward the filter (<NUM>, <NUM>) through a space between the first guide pipe (<NUM>, <NUM>) and the second guide pipe (<NUM>, <NUM>), is filtered out, and is then discharged through the discharge port (<NUM>, <NUM>).