A fully functional penetrator, medical device and method of use

Abstract

The application discloses a full-function puncture device, medical equipment and a use method thereof, and provides the full-function puncture device, the medical equipment and the use method. The puncture device is improved in the structure of the internal sealing film, so that the sealing film is thinner and the sealing effect is better. The medical equipment comprises the puncture device, a laparoscope, a balloon dilator and a guide rod used in cooperation with the balloon dilator. The use method of the medical equipment comprises the following steps: inserting the puncture device into the abdominal cavity; replacing the puncture knife of the puncture device with the balloon dilator; replacing the balloon dilator in the puncture device with the laparoscope; connecting the puncture device with an external pneumoperitoneum machine; taking out the laparoscope and the balloon dilator; and inserting a surgical instrument along a catheter channel to perform surgery. The use method of the medical equipment only needs to perform an action of inserting into the abdominal cavity once, so that the damage to the human body is reduced and the operation of the medical staff is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to a full-function puncture device, a medical device and a use method. BACKGROUND

[0002] The puncture device is a commonly used tool in laparoscopic surgery, which can provide multiple specimen removal methods and is suitable for most surgical occasions. The existing puncture device has multiple sealing structures inside, which can effectively prevent gas leakage. However, the sealing sheet used when no instrument is used in the existing sealing structure is made of thick soft rubber material to achieve good airtightness. However, it requires a lot of effort to insert or pull out the instrument, and the existing sealing sheet usually relies on its own elastic force to achieve recovery sealing after the instrument is pulled out. After multiple uses, the opening of the sealing sheet is prone to become loose, causing the sealing effect to decrease. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, the present application provides a full-function puncture device, a medical device and a use method. The structure of the sealing membrane inside the puncture device is improved, making the sealing membrane thinner while having better sealing effect. It can be reused without affecting the sealing effect, and is convenient for medical personnel to operate.

[0004] The technical scheme adopted by the present application to solve its technical problems is:

[0005] A full-function puncture device, comprising a catheter, a support connected to one end of the catheter, the catheter and the support having a channel passing through in the axial direction, the support being provided with a gas filling structure communicating with the channel, and a gas valve controlling the opening end of the gas filling structure, further comprising a first sealing assembly and a second sealing assembly, the first sealing assembly, the second sealing assembly and the support being sequentially sealed and connected from top to bottom, the first sealing assembly being provided with an axial through hole, the second sealing assembly comprising a second sealing seat, a second sealing membrane and a connecting piece, the connecting piece connecting the second sealing membrane to the second sealing seat,

[0006] The second sealing membrane has a top opening and a first slit in the axial direction of the second sealing assembly, the first slit has a closed state and an open state, the lower part of the second sealing membrane is divided into two first sealing sheets by the first slit, the part near the first slit of the two first sealing sheets is provided as a flat surface, and the first sealing sheet is provided with a first reinforcing rib perpendicular to the first slit, when the second sealing assembly is connected to the support at the top of the catheter, the first reinforcing rib abuts against the inner wall of the catheter, generating a force pressing the first sealing sheet towards the first slit, thereby strengthening the sealing effect,

[0007] The vertical height of the two ends of the first slit is greater than the vertical height of the middle part of the first slit, so that the first slit has a V-shaped structure.

[0008] Further, the connecting piece is in a ring structure, and the outer periphery of the ring structure is provided with a plurality of second connecting buckles, the second sealing seat is provided with second connecting buckle mounting holes, the top of the second sealing film is provided with third connecting buckle mounting holes, and the second connecting buckles of the connecting piece are sequentially connected with the second connecting buckle mounting holes and the third connecting buckle mounting holes, so that the connection between the second sealing film and the second sealing seat is realized.

[0009] Further, the first sealing assembly comprises a first sealing upper seat, a first sealing lower seat and a first sealing film, the first sealing film is arranged between the first sealing upper seat and the first sealing lower seat, the first sealing lower seat is provided with a plurality of limiting holes and a limiting step, the first sealing upper seat is provided with limiting columns and limiting blocks matched with the number of the limiting holes, the first sealing upper seat is provided with limiting block movable cavities, the limiting blocks can float left and right in the limiting block movable cavities, and the connection between the first sealing upper seat and the first sealing lower seat is realized through the cooperation between the limiting holes and the limiting columns and the cooperation between the limiting blocks and the limiting step.

[0010] Further, the first sealing film is in a funnel structure with a circular hole in the middle part, and protrudes towards the direction of the catheter, the inner side of the funnel structure is provided with a plurality of groove structures, a gap is reserved between every two adjacent groove structures, and the gap is provided with an inclined surface at one end extending to the circular hole in the middle part of the first sealing film.

[0011] Further, a plurality of first sealing film protection pieces are arranged above the first sealing film, the first sealing film is provided with first mounting holes, the first sealing assembly further comprises an adapter piece assembly, the adapter piece assembly comprises an adapter piece base, an adapter piece middle seat and an adapter piece cover plate, the adapter piece base is arranged below the first sealing film, the adapter piece middle seat and the adapter piece cover plate are arranged above the first sealing film, the first sealing film protection pieces are provided with second mounting holes, the adapter piece middle seat is provided with third mounting holes, the adapter piece base is provided with fourth mounting grooves, the adapter piece cover plate is provided with adapter piece mounting columns, and the adapter piece mounting columns are sequentially connected with the second mounting holes, the third mounting holes, the first mounting holes and finally limited in the fourth mounting grooves.

[0012] Further, the support is provided with a first guide inclined surface, the second sealing seat is provided with a first guide step at the bottom, the first guide step is clamped on the support along the first guide inclined surface, the connection between the catheter support and the second sealing assembly is realized, the second sealing seat is provided with a first connecting buckle along the outer edge, the first sealing lower seat is provided with a first buckle connecting hole at the bottom, and the first connecting buckle and the first buckle connecting hole are matched to realize the connection between the first sealing assembly and the second sealing assembly.

[0013] Further, the puncture knife further comprises a knife body and a handle connected to the knife body, and the handle is provided with a connecting assembly for connecting the support.

[0014] The medical instrument further comprises an endoscope, a balloon dilator, and a guide rod for the balloon dilator, wherein the balloon dilator comprises a handle, an inflation pipe, and a balloon, one end of the inflation pipe is connected to the handle, the other end of the inflation pipe is sleeved with the balloon, the handle is provided with an inflation hole on the side surface, and the inflation hole is connected with an air injection structure.

[0015] Further, the handle is internally provided with a third sealing film and an annular sealing element, the bottom of the third sealing film is provided with a second cutting seam, the second cutting seam cuts the third sealing film into two second sealing pieces, and the second sealing pieces are provided with second reinforcing ribs on the vertical sides of the second cutting seam.

[0016] The use method of the medical instrument comprises the following steps:

[0017] Step one, insert the puncture knife into the puncture device catheter, and then insert the puncture device into the extraperitoneal cavity along the micro-invasive incision of the patient;

[0018] Step two, remove the puncture knife in the puncture device, insert the guide rod into the inflation pipe of the balloon dilator until the top of the balloon, and then slowly push the guide rod along the catheter of the puncture device to make the balloon reach the position to be dilated;

[0019] Step three, remove the guide rod, insert the endoscope into the abdominal cavity through the round hole at the top end of the handle of the balloon dilator, and observe the environment in the abdominal cavity;

[0020] Step four, inject external air into the balloon through the air injection structure of the balloon dilator to make the balloon expand to the required gas volume for the operation, and after the balloon is filled for tens of minutes, an artificial operation cavity can be formed in the abdominal cavity;

[0021] Step five, connect the inflation structure on the puncture device to an external pneumoperitoneum machine, open the air valve of the inflation structure to form an air inlet channel from the pneumoperitoneum machine to the abdominal cavity, and through air injection into the abdominal cavity, the artificial operation cavity can be maintained, and the subsequent operation can be carried out without affecting;

[0022] Step six, remove the endoscope, close the air injection check valve of the balloon dilator, release the gas in the balloon to the outside, remove the balloon dilator, and keep the catheter in the extraperitoneal cavity at the required position for the operation;

[0023] Step seven, use the catheter channel of the puncture device as an inlet of a surgical instrument, and insert the surgical instrument to perform the operation.

[0024] The beneficial effects of the present application are:

[0025] The present application provides a full-function puncture device, a medical device and a use method, the puncture device is improved by improving the structure of the internal sealing film, the sealing film becomes thinner while the sealing effect is better, it can be reused and does not affect the sealing effect, it is convenient for the operation of medical staff, the medical device facilitates the operation of medical staff, the puncture device can maintain a good sealing environment when no instrument is inserted, the puncture device can also maintain a good sealing environment when used with other components of the medical device, the present application also provides a use method of a medical device, by using the method, only one action of inserting into the abdominal cavity of the human body is needed to form an artificial operation cavity in the abdominal cavity, which can reduce the damage to the human body and facilitate the operation of medical staff. BRIEF DESCRIPTION OF DRAWINGS

[0026] The present application is further illustrated below in conjunction with the drawings and examples.

[0027] Figure 1 is a whole schematic diagram of a full-function puncture device in the present application;

[0028] Figure 2 is a structure exploded view of a full-function puncture device in the present application;

[0029] Figure 3 is a structure exploded view of a first sealing assembly of a full-function puncture device in the present application;

[0030] Figure 4 is a further structure exploded view of a first sealing assembly of a full-function puncture device in the present application;

[0031] Figure 5 is a structure exploded view of a second sealing assembly of a full-function puncture device in the present application;

[0032] Figure 6 is a schematic diagram of a second sealing film of a full-function puncture device in the present application;

[0033] Figure 7 is a schematic diagram of a second sealing film of a full-function puncture device in the present application from another angle;

[0034] Figure 8 is a cross-sectional view of a full-function puncture device in the present application;

[0035] Figure 9 is a schematic diagram of a medical device in the present application;

[0036] Figure 10 is a schematic diagram of a balloon dilator of a medical device in the present application;

[0037] Figure 11 is a structural exploded view of the balloon dilator in the present application;

[0038] Figure 12 is a schematic view of the third sealing membrane of the balloon dilator in the present application;

[0039] Figure 13 is a flow chart of the method for using the medical instrument in the present application. DETAILED DESCRIPTION

[0040] The concept, specific structure and resulting technical effects of the present application will be described clearly and completely in combination with the embodiments and the accompanying drawings, so as to fully understand the purpose, features and effects of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. In addition, all the coupling / connection relationships involved in the patent do not mean that the components are directly connected, but that a better coupling structure can be composed by adding or reducing coupling accessories according to the specific implementation situation. The technical features in the present application can be combined interactively without mutual contradiction and conflict.

[0041] Referring to Figures 1 to 8 , a full-function puncture device 1 comprises a catheter 11, a support 15 connected to one end of the catheter 11, the catheter 11 and the support 15 having an axial through channel, the support 15 being provided with an inflation structure 111 communicating with the channel, a gas valve 112 controlling the opening of the inflation structure 111, a first sealing assembly 13 and a second sealing assembly 12, the first sealing assembly 13, the second sealing assembly 12 and the support 15 being sequentially sealed and connected from top to bottom, a puncture cutter 2 used in conjunction with the puncture device, the puncture cutter 2 comprising a cutter body and a cutter handle connected to the cutter body, the cutter handle being provided with a connecting assembly for connecting the support of the puncture device.

[0042] The first sealing assembly 13 comprises a first sealing upper seat 133, a first sealing lower seat 131 and a first sealing membrane 132, the first sealing upper seat 133 and the first sealing lower seat 131 being coverably connected to form a first sealing membrane accommodating cavity, and the first sealing membrane 132 being arranged in the first sealing membrane accommodating cavity between the first sealing upper seat 133 and the first sealing lower seat 131.

[0043] The first sealing lower seat 131 is provided with a plurality of limiting holes 1312 and a limiting step 1311, the first sealing upper seat 133 is provided with a limiting column 1333 and a limiting block 1332 which are matched with the number of the limiting holes 1312, the first sealing upper seat 133 is provided with a limiting block movable cavity 1331, the limiting block 1332 can float left and right in the limiting block movable cavity 1331, when the first sealing upper seat 133 is connected with the first sealing lower seat 131, the limiting holes 1312 and the limiting column 1333 are connected with each other, the limiting block 1332 is limited outside the limiting step 1311, through the double limiting structure, the first sealing upper seat 133 and the first sealing lower seat 131 are tightly connected to realize sealing.

[0044] The first sealing film 132 is made of soft glue material, the first sealing film 132 is provided with a funnel-shaped structure with a circular hole in the middle, protruding towards the direction of the catheter, the inner side of the funnel-shaped structure is provided with a plurality of groove structures 1328, a gap is reserved between every two adjacent groove structures 1328, the gap extends to one end of the middle circular hole and is provided with an inclined surface 1329, the setting of the inclined surface 1329 can more conveniently insert the instrument.

[0045] The upper side of the first sealing film 132 is provided with a plurality of first sealing film protection sheets 1325, the first sealing film protection sheet 1325 is made of thermoplastic polyurethane elastomer material and is a fan-shaped structure, a circular hole which is matched with the size of the middle circular hole of the first sealing film 132 can be formed in the middle of the first sealing film protection sheet 1325 after being enclosed, when the instrument is inserted, the first sealing film protection sheet 1325 can guide the instrument to be inserted along the circular hole to prevent deviation and pierce the first sealing film 132.

[0046] The first sealing film 132 is provided with a first mounting hole 1321, the first sealing assembly further comprises an adapter sheet assembly, the adapter sheet assembly comprises an adapter sheet base 1322, an adapter sheet middle seat 1323 and an adapter sheet cover plate 1324, the adapter sheet base 1322 is arranged below the first sealing film 132, the adapter sheet middle seat 1323 and the adapter sheet cover plate 1324 are arranged above the first sealing film 132. The first sealing film protection sheet 1325 is provided with a second mounting hole 13251, the adapter sheet middle seat 1323 is provided with a third mounting hole 13231, the adapter sheet base 1322 is provided with a fourth mounting groove 13221, and the adapter sheet cover plate 1324 is provided with an adapter sheet mounting column 13241. The adapter sheet mounting column 13241 is sequentially connected through the second mounting hole 13251, the third mounting hole 13231, the first mounting hole 1321 and finally limited in the fourth mounting groove 13221.

[0047] Through the setting of the adapter sheet assembly, the first sealing film protection sheet 1325 and the first sealing film 132 can be tightly connected.

[0048] The second sealing assembly 12 comprises a second sealing seat 121, a second sealing film 122 and a connecting piece 123, the outer edge of the second sealing seat 121 is provided with a first connecting buckle 1211, the bottom of the first sealing lower seat 131 is provided with a first buckle connecting hole 1313, the first connecting buckle 1211 is matched with the first buckle connecting hole 1313 to realize the connection of the first sealing assembly 13 and the second sealing assembly 12.

[0049] The connecting piece 123 is in a ring structure, the outer periphery of the ring structure is provided with a plurality of second connecting buckles 1231, the second sealing seat 121 is provided with a second connecting buckle mounting hole 1212, the top of the second sealing film 122 is provided with a third connecting buckle mounting hole 1221, the second connecting buckle 1231 of the connecting piece 123 is sequentially connected with the second connecting buckle mounting hole 1212 and the third connecting buckle mounting hole 1221 to realize the fixation of the second sealing film 122 on the second sealing seat 121.

[0050] The connecting piece 123 is in a ring structure, the outer periphery of the ring structure is provided with a plurality of second connecting buckles 1231, the second sealing seat 121 is provided with a second connecting buckle mounting hole 1212, the top of the second sealing film 122 is provided with a third connecting buckle mounting hole 1221, the second connecting buckle 1231 of the connecting piece 123 is sequentially connected with the second connecting buckle mounting hole 1212 and the third connecting buckle mounting hole 1221 to realize the fixation of the second sealing film 122 on the second sealing seat 121.

[0051] The second sealing film 122 has a top opening 1222 and a bottom first cut 1223 along the axial direction of the second sealing assembly, the second sealing film 122 is made of soft rubber, the first cut 1223 has a closed state and an open state, when the surgical instrument passes through the second sealing film 122, the first cut 1223 is opened by the surgical instrument from the closed state to the open state, and is sealed and attached to the outer periphery of the surgical instrument.

[0052] The lower part of the second sealing film 122 is divided into two first sealing pieces 1225 by the first cut 1223, the part close to the first cut 1223 of the two first sealing pieces 1225 is provided as a plane, which can make the first cut 1223 more attached in the closed state, the first sealing piece 1225 is provided with a first reinforcing rib 1224 in the vertical direction of the first cut 1223, when the second sealing film 122 is connected with the support 15 on the top of the catheter 11, the first reinforcing rib 1224 will abut against the inner wall of the catheter 11, and an extrusion force to the first cut 1223 is generated on the first sealing piece 1225, so as to strengthen the sealing effect, due to the existence of the abutting force, the first sealing piece 1225 of the second sealing film 122 can be provided as a relatively thin structure.

[0053] The vertical height of the two ends of the first cut 1223 is greater than the vertical height of the middle part of the first cut 1223, so that the first cut 1223 is in a V-shaped structure.

[0054] By setting such a V-shaped structure, the first cut 1223 can be made larger when it is stretched, which is more convenient for the passage of surgical instruments. In addition, the first reinforcing rib 1224 is provided, and after the instrument passes, the first sealing sheet 1225 can tightly adhere to the outer periphery of the surgical instrument, without affecting the sealing effect.

[0055] The support 15 of the catheter 11 is provided with a first guide slope 151, and the bottom of the second sealing seat 121 is provided with a first guide step (not shown in the figure). The first guide step can be clamped on the support 15 along the first guide slope 151, so as to realize the connection of the support 15 and the second sealing assembly 12. The clamped connection structure is convenient for connection and disconnection.

[0056] The outer surface of the catheter 11 is provided with a plurality of barbs, which can increase the friction force of the catheter pulling out, and also can make the tissue of the abdominal cavity surface clamped between the two, so as to strengthen the stability of the catheter.

[0057] The support 15 is provided with an annular winding structure 113. During the operation, the suture can pass through the winding structure 113 and be fixed on the skin, so that the surgical instrument will not affect the catheter when it is pulled out.

[0058] The inflation structure 111 on the support can be connected to the external gas source to inject gas into the abdominal cavity, or can discharge gas to the outside through the inflation structure 111. The gas valve 112 is used to control the connection and disconnection of the inflation structure 111. The side surface of the support is provided with an inflation structure mounting position 1111. The inflation structure 111 is connected in the inflation structure mounting position 1111 and is communicated with the channel in the catheter 11.

[0059] Referring to Figure 9 , a medical instrument, comprising the puncture device 1 described above, further comprising an endoscope 3, a balloon dilator 5, and a lead-in rod 4 used in cooperation with the balloon dilator 5. The endoscope 3 and the lead-in rod 4 belong to common structures in the industry, and will not be described in detail here.

[0060] Referring to Figures 10 to 12 , the balloon dilator 5 comprises a handle, an inflation pipeline 23, and a gas bag 24 sleeved on one end of the inflation pipeline 23.

[0061] The handle comprises a handle upper cover 21 and a handle lower cover 28. The bottom of the handle lower cover 28 is provided with an inflation pipeline mounting position 283. The other end of the inflation sleeve 23 is sleeved in the inflation pipeline mounting position 283.

[0062] The side surface of the handle lower cover 28 is provided with an inflation port 282. The inflation port 282 is connected with a gas injection structure 22 and a gas injection one-way valve 221. The gas injection structure 22 is used to connect the external gas source, so as to realize the inflation of the gas bag 24, and also can release the gas in the gas bag 24 to the outside through the structure.

[0063] After the upper cover 21 and the lower cover 28 of the grip are closed, they form the inner cavity of the grip. A fixing member 26 is provided in the inner cavity of the grip. An annular sealing member 29 is provided below the fixing member 26. A third sealing membrane 27 is provided below the annular sealing member 29. A plane 272 is provided at the bottom of the third sealing membrane 27. A second slit is provided in the plane 272. The second slit cuts the third sealing membrane 27 into two second sealing pieces 273. A second reinforcing rib 274 is provided in the vertical direction of the second slit.

[0064] The upper cover 21 of the grip has an upper cover mounting position 212, the lower cover 28 of the grip has a lower cover mounting position 281, the inner cavity of the grip has a grip connector 25, the grip connector 25 is an integrally formed elastic connector, the top of the grip connector 25 is an annular structure 251, the top of the upper cover 21 of the grip has a round hole, the grip connector 25 has grip steps 252 and grip buckles 253 extending downward on both sides, the grip steps 252 are limited to the upper cover mounting position 212, the grip buckles 252 pass through the lower cover mounting position 281, the first sealing upper seat 133 of the puncture device 1 has a grip buckle connecting position 1312, the grip buckles 253 cooperate with the grip buckle connecting position 1312 to realize the connection between the puncture device 1 and the balloon dilator 5.

[0065] A method of using a medical device includes the following steps:

[0066] Step 1: Insert the puncture tool into the puncture catheter, ensure that the connecting component of the puncture tool is fixedly connected to the support of the puncture device, and then gently rotate the puncture device left and right along the patient's minimally invasive incision into the extraperitoneal cavity.

[0067] Step 2: Remove the puncture knife from the puncture device, insert the guide rod into the inflation tube of the balloon dilator until the top of the balloon, and then slowly push the guide rod along the inflation tube of the balloon dilator to bring the balloon to the position to be inflated.

[0068] Step 3: Remove the guide rod and insert the endoscope into the abdominal cavity through the round hole at the top of the balloon dilator handle to observe the abdominal cavity environment;

[0069] Step 4: Inject external air into the balloon through the balloon dilator's inflation structure to inflate the balloon to the gas volume required for the surgical procedure. After keeping the balloon inflated for several tens of minutes, an artificial operating cavity can be formed in the abdominal cavity.

[0070] Step 5: Connect the inflator on the trocar to the external pneumoperitoneum machine, open the air valve of the inflator to form an air intake channel from the pneumoperitoneum machine to the abdominal cavity. By injecting air into the abdominal cavity, the artificial operating space can be maintained without affecting the subsequent surgery.

[0071] Step six, take out the endoscope, close the inflation one-way valve of the balloon dilator, release the gas in the balloon to the outside, take out the balloon dilator, and the catheter remains in the required position of the extraperitoneal cavity operation;

[0072] Step seven, use the catheter channel of the puncture device as the entrance of the surgical instrument, and insert the surgical instrument to perform the operation.

[0073] The above is a specific description of the preferred embodiment of the application, but the application is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the application. These equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A full-function puncture device, comprising a catheter, a support connected to one end of the catheter, the catheter and the support having a channel passing through in the axial direction, the support being provided with an inflation structure communicating with the channel, and a gas valve controlling the opening of the inflation structure, and further comprising a first sealing assembly and a second sealing assembly, the first sealing assembly, the second sealing assembly and the support being sequentially connected in the order from top to bottom, the first sealing assembly being provided with an axial through hole, characterized in that the second sealing assembly comprises a second sealing seat, a second sealing membrane and a connecting piece, the connecting piece connecting the second sealing membrane to the second sealing seat, the second sealing membrane having a top opening and a first slit in the axial direction of the second sealing assembly, the first slit having a closed state and an open state, the lower part of the second sealing membrane being divided into two first sealing pieces by the first slit, the parts of the two first sealing pieces close to the first slit being flat, the first sealing pieces being provided with a first reinforcing rib in the vertical direction of the first slit, the first reinforcing rib abutting against the inner wall of the catheter when the second sealing assembly is connected to the support at the top of the catheter, so as to generate a force pressing the first sealing pieces towards the first slit and strengthening the sealing effect, the vertical height of the two ends of the first slit being greater than the vertical height of the middle part of the first slit, so that the first slit has a V-shaped structure, the first sealing assembly comprises a first sealing upper seat, a first sealing lower seat and a first sealing membrane, the first sealing membrane being arranged between the first sealing upper seat and the first sealing lower seat, the first sealing lower seat being provided with a plurality of limiting holes and a limiting step, the first sealing upper seat being provided with a limiting column and a limiting block matched with the number of limiting holes, the first sealing upper seat being provided with a limiting block movable cavity, the limiting block being able to float left and right in the limiting block movable cavity, the limiting holes and the limiting column being connected to each other, and the limiting block and the limiting step being matched with each other to realize the connection of the first sealing upper seat and the first sealing lower seat, the connecting piece being in the form of a ring structure, the outer periphery of the ring structure being provided with a plurality of second connecting buckles, the second sealing seat being provided with second connecting buckle mounting holes, the top of the second sealing membrane being provided with third connecting buckle mounting holes, the second connecting buckles of the connecting piece being connected to the second connecting buckle mounting holes and the third connecting buckle mounting holes in sequence to realize the connection of the second sealing membrane and the second sealing seat, the first sealing membrane being in the form of a funnel structure having a circular hole in the middle part, the funnel structure protruding towards the catheter, the inner side of the funnel structure being provided with a plurality of groove structures, a gap being reserved between every two adjacent groove structures, the gap extending to one end of the circular hole in the middle part of the first sealing membrane being provided with an inclined surface. ​ ​ ​ ​ 2. A fully functional lancet according to claim 1, wherein, ​ 3. A fully functional puncture device according to claim 1, wherein, ​ 4. A fully functional lancet according to claim 3, wherein, The first sealing film is provided with a plurality of first sealing film protection pieces, the first sealing film is provided with a first mounting hole, the first sealing assembly further comprises an adapter piece assembly, the adapter piece assembly comprises an adapter piece base, an adapter piece middle seat and an adapter piece cover plate, the adapter piece base is arranged below the first sealing film, the adapter piece middle seat and the adapter piece cover plate are arranged above the first sealing film, the first sealing film protection piece is provided with a second mounting hole, the adapter piece middle seat is provided with a third mounting hole, the adapter piece base is provided with a fourth mounting slot, the adapter piece cover plate is provided with an adapter piece mounting column, the adapter piece mounting column is sequentially connected through the second mounting hole, the third mounting hole, the first mounting hole and finally limited in the fourth mounting slot.

5. A fully functional lancet according to claim 4, wherein, The support is provided with a first guide slope, the second sealing seat bottom is provided with a first guide step, the first guide step is clamped on the support along the first guide slope, realizing the connection of the catheter support and the second sealing assembly, the outer edge of the second sealing seat is provided with a first connection buckle, the bottom of the first sealing lower seat is provided with a first buckle connection hole, the first connection buckle and the first buckle connection hole are matched to realize the connection of the first sealing assembly and the second sealing assembly.

6. A fully functional puncture device according to claim 1, wherein, The puncture tool further comprises a puncture knife, the puncture knife comprises a knife body part and a knife handle connected to the knife body part, the knife handle is provided with a connection assembly for connecting the support.

7. A medical device, comprising: The puncture tool comprises the puncture tool according to any one of claims 1-6, further comprising a puncture tool, an endoscope, a balloon dilator and a guide rod for use with the balloon dilator, the balloon dilator comprises a handle, an inflation pipe and a balloon, one end of the inflation pipe is connected to the handle, the other end of the inflation pipe is sleeved with the balloon, the handle side is provided with an inflation hole, the inflation hole is connected with a gas injection structure, the gas injection structure can be connected with an external gas source.

8. The medical device of claim 7, wherein, The handle is internally provided with a third sealing film and an annular sealing element, the bottom of the third sealing film is provided with a second cutting seam, the second cutting seam cuts the third sealing film into two second sealing pieces, the second sealing pieces are provided with second reinforcing ribs in the vertical direction of the second cutting seam.

Images