Improved balloon puncture device and use method thereof

Abstract

The invention relates to an improved balloon puncture device and a use method thereof. The improved balloon puncture device comprises a puncture part and a sheath tube part which are matched with each other, the sheath tube part comprises a sealing seat and a guide sleeve which is hermetically inserted into the bottom of the sealing seat; the puncture part comprises a puncture rod which is movably inserted into the guide sleeve and a sealing mechanism which is fixed at the upper end of the puncture rod and is matched with the sealing seat; the sheath tube part further comprises a positioning sleeve fixedly arranged outside the guide sleeve in a sleeving manner; the sheathing canal part further comprises a sleeve which is inserted into one side of the upper end of the positioning sleeve in a sealed mode and communicated with the annular air inlet cavity, a one-way valve arranged in the sleeve, and a connector which is inserted into an opening in the end of the sleeve in a sealed mode and communicated with an air inlet of the one-way valve. According to the invention, the incision is effectively prevented from being expanded, so that secondary injury to a patient is avoided, and accurate operation is ensured; in addition, the state of the annular balloon can be directly observed in real time so as to ensure normal operation, and therefore use is greatly facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of abdominal surgery instruments, and in particular to an improved balloon puncture device and a use method thereof. Background Art

[0002] A balloon puncture device is a commonly used tool in clinical laparoscopic surgery, which is used to establish a channel for surgical instruments to enter the human body and maintain the operating space required for the operation. The sleeve on the current balloon puncture device is provided with a pressure ring and an annular balloon that cooperate with each other to limit the position. The position of the pressure ring can be moved along the axial direction of the sleeve, and the position of the annular balloon remains fixed. When the puncture rod of the balloon puncture device is in place, air can be injected into the annular balloon with the help of a syringe and the airway provided in the balloon puncture device to gradually expand the annular balloon, and then the position of the pressure ring can be moved to be close to the annular balloon until the inner and outer sides of the abdominal cavity are clamped to achieve the purpose of fixing the balloon puncture device.

[0003] However, the outer contours of the pressure ring in the existing balloon puncture device and the side of the annular balloon close to the abdominal cavity are mostly arc-shaped, so only a small part of the area is in contact with the inner or outer side of the abdominal cavity, so the contact area between the pressure ring and the annular balloon and the corresponding side of the abdominal cavity is small; at the same time, the arc-shaped structure does not limit the abdominal cavity, resulting in the pressure ring and the annular balloon being very easy to move; therefore, after the puncture channel is established, the patient or medical staff slightly touches the sleeve, which will cause the balloon puncture device to shake greatly, and at the same time, it will cause the incision to expand and cause secondary damage to the patient, and the puncture position will also change, thereby affecting the accurate performance of the operation; in addition, since the annular balloon is located inside the patient's abdominal cavity, the medical staff cannot directly and real-time observe the state of the annular balloon. If the annular balloon is not fully filled, the fixation of the balloon puncture device will be more unstable. If the annular balloon is overfilled, it will rupture, resulting in interruption of the operation. The ruptured fragments may remain in the patient's body and cause damage, and it is also difficult to remove them, so it is extremely inconvenient to use and urgently needs to be solved. Summary of the invention

[0004] In view of the current status of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a device that greatly increases the contact area between the pressure ring and the external skin of the abdominal cavity and the annular balloon and the internal mucosa of the abdominal cavity to limit the abdominal cavity. Even if the puncture channel is accidentally touched by the patient or medical staff after the establishment of the puncture channel, only a slight shake will occur, thereby effectively preventing the incision from expanding to avoid secondary injury to the patient, and the puncture position will not change, thereby ensuring the accurate performance of the operation. The state of the annular balloon can also be directly and real-time observed with the help of a camera or a pressure sensor, thereby quickly fixing the balloon puncture device and avoiding the rupture of the annular balloon due to overfilling to ensure the normal performance of the operation, thereby greatly facilitating the use of the improved balloon puncture device and its use method.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: an improved balloon puncture device, comprising a puncture part and a sheath part that cooperate with each other; the sheath part comprises a sealing seat and a guide sleeve that is sealed and plugged at the bottom of the sealing seat; the puncture part comprises a puncture rod that is movably inserted in the guide sleeve and a sealing mechanism that is fixed at the upper end of the puncture rod and cooperates with the sealing seat, characterized in that:

[0006] The sheath tube portion also includes a positioning sleeve fixedly mounted outside the guide sleeve, and the outer peripheral surface of the guide sleeve is provided with an annularly distributed air inlet groove, and the air inlet groove and the inner wall of the positioning sleeve form an annular air inlet cavity;

[0007] The sheath tube portion also includes a sleeve that is sealed and plugged at one side of the upper end of the positioning sleeve and communicates with the annular air inlet cavity, a one-way valve arranged in the sleeve, and an interface that is sealed and plugged at the opening of the end of the sleeve and communicates with the air inlet of the one-way valve;

[0008] The sheath tube portion also includes a positioning mechanism arranged outside the positioning sleeve;

[0009] The positioning mechanism comprises a pressing ring which is sleeved on the outside of the positioning sleeve and can slide along the axial direction of the positioning sleeve with damping, and an annular balloon which is sleeved on the outside of the positioning sleeve and located between the pressing ring and the opening of the end of the positioning sleeve, and a plane is formed on the pressing ring on one side facing the annular balloon;

[0010] The outer contour of the annular balloon after inflation is an inverted frustum, and the conical outer wall of the annular balloon is arranged in the direction of the opening of the end of the positioning sleeve so that the top outer wall is in a horizontal position after inflation and is arranged in the direction of the pressing ring;

[0011] The upper and lower edges of the inner peripheral surface opening of the annular balloon are both sealed and fixed on the outer peripheral surface of the positioning sleeve;

[0012] The positioning mechanism also includes a plurality of support rods fixed on the top outer wall of the annular balloon and uniformly arranged at equal angles along the circumferential direction, and one end of each support rod close to the positioning sleeve can be rotatably connected to the outer peripheral surface of the positioning sleeve;

[0013] A plurality of inflation holes are evenly distributed at equal angles along the circumferential direction and are interconnected with the annular air inlet cavity and are located inside the inner circumferential opening of the annular balloon.

[0014] Preferably, a conical convex ring is formed on the outer peripheral surface of the positioning sleeve and is invertedly distributed and located between the annular balloon and the opening of the end of the positioning sleeve. The top outer diameter of the conical convex ring matches the length of the support rod.

[0015] Preferably, the positioning mechanism further comprises a camera and / or a pressure sensor disposed on the positioning sleeve for monitoring the inflation state of the annular balloon.

[0016] Preferably, an annular cavity extending to the interior of the conical convex ring is opened on the inner circumferential surface of the positioning sleeve, and the camera includes at least one, each of which is sealed and embedded between the top outer wall of the conical convex ring and the top inner wall of the annular cavity and distributed in sequence along the circumferential direction, and the shooting end of each camera is set in the direction of the annular balloon.

[0017] Preferably, a first threading hole extending to the inner side of the annular cavity is formed at the upper end of the positioning sleeve, and at least one branching hole communicating with the annular cavity is formed between the inner wall of the first threading hole and the outer peripheral surface of the positioning sleeve.

[0018] Preferably, a second threading hole is provided between the upper end of the positioning sleeve and the upper inner wall of the air inlet groove, the pressure sensor is sealably embedded in the second threading hole at an opening at one end of the air inlet groove, and the detection end of the pressure sensor extends into the interior of the annular air inlet cavity.

[0019] Preferably, the outer peripheral surface of the positioning sleeve is also formed with a plurality of annular ribs which are arranged in sequence and at equal intervals along the axial direction of the positioning sleeve and are all located between the annular balloon and the sleeve. The pressure ring is interference-fitted outside the plurality of annular ribs to increase the friction resistance between it and the positioning sleeve.

[0020] Preferably, before the annular balloon is inflated, the distance between the end of each support rod away from the positioning sleeve and the outer peripheral surface of the positioning sleeve is the shortest and is not greater than the distance between the top edge of the conical convex ring and the outer peripheral surface of the positioning sleeve.

[0021] A method for using an improved balloon puncture device, characterized in that it comprises the following steps:

[0022] S1: First, insert the puncture rod into the guide sleeve and make the bottom of the sealing mechanism detachably fixed on the top of the sealing seat, then hold the sealing seat and align the end of the puncture rod with the abdominal mark and puncture to complete the puncture of the abdominal wall;

[0023] S2: When the puncture rod reaches the predetermined position in the abdominal cavity, the annular balloon is located inside the abdominal cavity, and the setting of the conical convex ring allows the uninflated annular balloon to smoothly extend into the abdominal cavity; with the help of an inflation tool such as a syringe, air is injected into the annular air inlet cavity through the interface and the air inlet of the one-way valve, and then the air is injected into the annular balloon through each inflation hole;

[0024] S3: As the air pressure in the annular balloon increases, the annular balloon is gradually expanded, and each support rod gradually swings toward the direction of the pressure ring as the annular balloon expands. When the annular balloon is fully expanded, the top of the annular balloon reaches a horizontal state, thereby making each support rod also in a horizontal state;

[0025] S4: Establish power and signal connections between each camera and an external display device through corresponding wires. The first wire threading hole and at least one branching hole are used for threading the corresponding wires. Since the shooting end of each camera is arranged in the direction of the annular balloon, when the medical staff inflates the annular balloon, each camera can display the expansion state of the annular balloon in real time in the form of dynamic images through the external display device. When the annular balloon is fully expanded, the medical staff will stop introducing air, thereby preventing the annular balloon from rupturing due to overfilling. In this way, the degree of inflation can be judged according to the deformation amplitude of the annular balloon;

[0026] S5: Establish power and signal connection between the pressure sensor and the external pressure measuring equipment through the corresponding wires. The second threading hole is used for threading the corresponding wires. Since the pressure in the annular air inlet cavity is equal to the pressure in the annular balloon, when the pressure sensor detects that the pressure value in the annular air inlet cavity reaches the specified value, the medical staff will stop introducing air, thereby preventing the annular balloon from rupturing due to overfilling. In this way, the degree of inflation can be judged according to the pressure value of the annular balloon.

[0027] S6: Push the pressure ring toward the annular balloon, and gradually reduce the distance between the pressure ring and the annular balloon, until each support rod and the bottom of the pressure ring are pressed tightly against the inner mucosa and the outer skin of the abdominal cavity respectively. Since the bottom of the pressure ring is provided with a flat surface, the contact area between the bottom of the pressure ring and the outer skin of the abdominal cavity is increased. Since each support rod is in a horizontal state after the annular balloon is fully expanded, the contact area between the top of the annular balloon and the inner mucosa of the abdominal cavity is increased, thereby increasing the stability and firm fixation of the sheath tube.

[0028] Compared with the prior art, the advantages of the present invention are: the present invention sets the bottom of the pressure ring into a plane, and makes the top of the annular balloon in a horizontal state with the help of multiple support rods after it is fully expanded, so that it can cooperate with the plane to clamp the outer and inner sides of the abdominal cavity respectively, thereby greatly increasing the contact area between the pressure ring and the skin outside the abdominal cavity and the annular balloon and the mucosa inside the abdominal cavity; at the same time, the pressure ring and the annular balloon can also restrain each other to avoid movement, thereby limiting the abdominal cavity; when the puncture channel is established, even if the patient or medical staff touches the positioning sleeve, the balloon puncture device will only shake slightly, which effectively prevents the incision from expanding to avoid secondary injury to the patient, and the position of the balloon puncture device will not change, thereby ensuring the accurate performance of the operation; in addition, the state of the annular balloon can be directly and real-time observed with the help of a camera or a pressure sensor, and the inflation can be stopped immediately when the annular balloon is fully filled, so that the balloon puncture device can be quickly fixed and the annular balloon can be prevented from rupturing due to overfilling, thereby ensuring the normal performance of the operation, which greatly facilitates use. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the exploded structure of the present invention from the upper side;

[0030] Figure 2 It is a structural diagram of the annular balloon of the present invention when it is not inflated;

[0031] Figure 3 It is a front cross-sectional structural diagram of the sheath tube portion of the present invention;

[0032] Figure 4 It is a cross-sectional structural diagram of the present invention viewed from the top in the direction of A;

[0033] Figure 5 It is a partial enlarged structural diagram of the present invention at position B. DETAILED DESCRIPTION

[0034] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. The term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships, such as A and / or B, which can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0035] In order to keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and well-known components are omitted.

[0036] like Figures 1 to 4 As shown, an improved balloon puncture device comprises a puncture part 1 and a sheath part 2 which cooperate with each other;

[0037] The sheath tube portion 2 includes a sealing seat 21 and a guide sleeve 22 sealingly inserted at the bottom of the sealing seat 21;

[0038] The puncture part 1 includes a puncture rod 12 movably inserted in the guide sleeve 22 and a sealing mechanism 11 fixed to the upper end of the puncture rod 12 and cooperating with the sealing seat 21;

[0039] The sheath tube part 2 also includes a positioning sleeve 23 which is sleeved and fixed outside the guide sleeve 22. The outer peripheral surface of the guide sleeve 22 is provided with an annularly distributed air inlet groove 221. The air inlet groove 221 and the inner wall of the positioning sleeve 23 form an annular air inlet cavity 27.

[0040] The sheath tube portion 2 further includes a sleeve 24 which is sealed and plugged at one side of the upper end of the positioning sleeve 23 and communicates with the annular air inlet cavity 27, a one-way valve 26 arranged in the sleeve 24, and an interface 25 which is sealed and plugged at the end opening of the sleeve 24 and communicates with the air inlet of the one-way valve 26;

[0041] The sheath tube portion 2 further includes a positioning mechanism 28 disposed outside the positioning sleeve 23;

[0042] The positioning mechanism 28 includes a pressing ring 283 which is sleeved on the outside of the positioning sleeve 23 with interference fit and can slide along the axial direction of the positioning sleeve 23 with damping, and an annular balloon 282 which is sleeved on the outside of the positioning sleeve 23 and located between the pressing ring 283 and the opening at the end of the positioning sleeve 23. The pressing ring 283 is made of a medical elastic material, and a flat surface 2831 is formed on the side of the pressing ring 283 facing the annular balloon 282.

[0043] The outer contour of the annular balloon 282 after inflation is an inverted frustum, and the conical outer wall of the annular balloon 282 is arranged toward the opening of the end of the positioning sleeve 23 so that the top outer wall is in a horizontal position after inflation and is arranged toward the pressing ring 283;

[0044] The upper and lower edges of the inner peripheral opening of the annular balloon 282 are sealed and fixed to the outer peripheral surface of the positioning sleeve 23;

[0045] The positioning mechanism 28 also includes a plurality of support rods 281 fixed on the top outer wall of the annular balloon 282 and evenly arranged at equal angles along the circumferential direction, and one end of each support rod 281 close to the positioning sleeve 23 can be rotatably connected to the outer circumferential surface of the positioning sleeve 23;

[0046] A plurality of inflation holes 231 are evenly distributed at equal angles along the circumferential direction and are interconnected with the annular air inlet cavity 27 and are located inside the inner circumferential opening of the annular balloon 282 .

[0047] The outer peripheral surface of the positioning sleeve 23 is also formed with an inverted conical convex ring 232 located between the annular balloon 282 and the end opening of the positioning sleeve 23 . The top outer diameter of the conical convex ring 232 matches the length of the support rod 281 .

[0048] The positioning mechanism 28 further includes a camera 29 and / or a pressure sensor 210 disposed on the positioning sleeve 23 for monitoring the inflation state of the annular balloon 282 .

[0049] An annular cavity 235 extending to the interior of the conical convex ring 232 is provided on the inner circumferential surface of the positioning sleeve 23, and the camera 29 includes at least one. Each camera 29 is sealed and embedded between the top outer wall of the conical convex ring 232 and the top inner wall of the annular cavity 235 and is distributed in sequence along the circumferential direction. The shooting end of each camera 29 is set in the direction of the annular balloon 282.

[0050] A first threading hole 233 extending to the inner side of the annular cavity 235 is formed at the upper end of the positioning sleeve 23 , and at least one branching hole 234 communicating with the annular cavity 235 is formed between the inner wall of the first threading hole 233 and the outer peripheral surface of the positioning sleeve 23 .

[0051] A second threading hole 236 is also provided between the upper end of the positioning sleeve 23 and the upper inner wall of the air inlet groove 221 . The pressure sensor 210 is sealed and embedded in the second threading hole 236 at an opening at one end of the air inlet groove 221 . The detection end of the pressure sensor 210 extends into the interior of the annular air inlet cavity 27 .

[0052] The outer circumferential surface of the positioning sleeve 23 is also formed with multiple annular ribs 237 that are arranged in sequence and at equal intervals along the axial direction of the positioning sleeve 23 and are all located between the annular balloon 282 and the sleeve 24. The pressure ring 283 is interference-fitted outside the multiple annular ribs 237 to increase the friction resistance between it and the positioning sleeve 23.

[0053] A plurality of concentrically arranged annular folds 2821 are formed on the conical outer wall of the annular balloon 282 to allow the annular balloon 282 to be folded in an orderly manner before being inflated.

[0054] Before the annular balloon 282 is inflated, the distance between the end of each support rod 281 away from the positioning sleeve 23 and the outer peripheral surface of the positioning sleeve 23 is the shortest and is not greater than the distance between the top edge of the conical convex ring 232 and the outer peripheral surface of the positioning sleeve 23.

[0055] A method for using an improved balloon puncture device comprises the following steps:

[0056] S1: First, insert the puncture rod 12 into the guide sleeve 22 and make the bottom of the sealing mechanism 11 detachably fixed to the top of the sealing seat 21, then hold the sealing seat 21 and align the end of the puncture rod 12 with the abdominal mark and pierce to complete the puncture of the abdominal wall;

[0057] S2: When the puncture rod 12 reaches the predetermined position in the abdominal cavity, the annular balloon 282 is located inside the abdominal cavity, and the setting of the conical convex ring 232 allows the uninflated annular balloon 282 to smoothly extend into the abdominal cavity; by means of an inflation tool such as a syringe, air is injected into the annular air inlet cavity 27 through the interface 25 and the air inlet of the one-way valve 26, and then the air is injected into the annular balloon 282 through each inflation hole 231;

[0058] S3: As the air pressure in the annular balloon 282 increases, the annular balloon 282 is gradually expanded, and each support rod 281 gradually swings toward the pressure ring 283 following the expansion of the annular balloon 282. When the annular balloon 282 is fully expanded, the top of the annular balloon 282 reaches a horizontal state, thereby making each support rod 281 also in a horizontal state;

[0059] S4: Establish power and signal connection between each camera 29 and an external display device through corresponding wires. The first threading hole 233 and at least one branching hole 234 are used for threading corresponding wires. Since the shooting end of each camera 29 is set in the direction of the annular balloon 282, when the medical staff inflates the annular balloon 282, each camera 29 can display the expansion state of the annular balloon 282 in real time in the form of dynamic images through the external display device. When the annular balloon 282 is fully expanded, the medical staff will stop introducing air to avoid the annular balloon 282 from rupturing due to overfilling. In this way, the degree of inflation can be judged according to the deformation amplitude of the annular balloon 282;

[0060] S5: Establish power and signal connection between the pressure sensor 210 and the external pressure measuring equipment through the corresponding wires. The second threading hole 236 is used for the threading of the corresponding wires. Since the pressure in the annular air inlet chamber 27 is equal to the pressure in the annular balloon 282, when the pressure sensor 210 detects that the pressure value in the annular air inlet chamber 27 reaches the specified value, the medical staff will stop introducing air, thereby preventing the annular balloon 282 from rupturing due to overfilling. In this way, the degree of inflation can be judged according to the pressure value of the annular balloon 282.

[0061] S6: Push the pressing ring 283 toward the annular balloon 282, and gradually reduce the distance between the pressing ring 283 and the annular balloon 282, until each support rod 281 and the bottom of the pressing ring 283 are respectively pressed against the inner mucosa and the outer skin of the abdominal cavity. Since the bottom of the pressing ring 283 is provided with a flat surface 2831, the contact area between the bottom of the pressing ring 283 and the outer skin of the abdominal cavity is increased. Since each support rod 281 is in a horizontal state after the annular balloon 282 is fully expanded, the contact area between the top of the annular balloon 282 and the inner mucosa of the abdominal cavity is increased, thereby increasing the stability and firm fixation of the sheath tube 2.

[0062] The present invention provides a flat surface 2831 at the bottom of the pressing ring 283, and makes the top of the annular balloon 282 in a horizontal state with the help of multiple support rods 281 after it is fully expanded, so that it can cooperate with the flat surface 2831 to clamp the outer side and inner side of the abdominal cavity respectively, thereby greatly increasing the contact area between the pressing ring 283 and the external skin of the abdominal cavity and the annular balloon 282 and the internal mucosa of the abdominal cavity; at the same time, the pressing ring 283 and the annular balloon 282 can also restrain each other to avoid movement, thereby limiting the abdominal cavity; when the puncture channel is established, the patient or medical staff can immediately When the balloon puncture device touches the positioning sleeve 23, it will only shake slightly, which effectively prevents the incision from expanding to avoid secondary injury to the patient, and the puncture position will not change, thereby ensuring the accurate performance of the operation; in addition, the state of the annular balloon 282 can be directly and real-time observed with the help of the camera 29 or the pressure sensor 210, and the inflation can be stopped immediately when the annular balloon 282 is fully filled, so that the balloon puncture device can be quickly fixed, and the annular balloon 282 can be prevented from rupturing due to overfilling, thereby ensuring the normal performance of the operation, which greatly facilitates use.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An improved balloon puncture device, comprising a puncture part and a sheath part that cooperate with each other; the sheath part comprises a sealing seat and a guide sleeve that is sealed and plugged into the bottom of the sealing seat; the puncture part comprises a puncture rod that is movably inserted in the guide sleeve and a sealing mechanism that is fixed to the upper end of the puncture rod and cooperates with the sealing seat, characterized in that: The sheath tube portion also includes a positioning sleeve fixedly mounted outside the guide sleeve, and the outer peripheral surface of the guide sleeve is provided with an annularly distributed air inlet groove, and the air inlet groove and the inner wall of the positioning sleeve form an annular air inlet cavity; The sheath tube portion also includes a sleeve that is sealed and plugged at one side of the upper end of the positioning sleeve and communicates with the annular air inlet cavity, a one-way valve arranged in the sleeve, and an interface that is sealed and plugged at the opening of the end of the sleeve and communicates with the air inlet of the one-way valve; The sheath tube portion also includes a positioning mechanism arranged outside the positioning sleeve; The positioning mechanism comprises a pressing ring which is sleeved on the outside of the positioning sleeve and can slide along the axial direction of the positioning sleeve with damping, and an annular balloon which is sleeved on the outside of the positioning sleeve and located between the pressing ring and the opening of the end of the positioning sleeve, and a plane is formed on the pressing ring on one side facing the annular balloon; The outer contour of the annular balloon after inflation is an inverted frustum, and the conical outer wall of the annular balloon is arranged in the direction of the opening of the end of the positioning sleeve so that the top outer wall is in a horizontal position after inflation and is arranged in the direction of the pressing ring; The upper and lower edges of the inner peripheral surface opening of the annular balloon are both sealed and fixed on the outer peripheral surface of the positioning sleeve; The positioning mechanism also includes a plurality of support rods fixed on the top outer wall of the annular balloon and uniformly arranged at equal angles along the circumferential direction, and one end of each support rod close to the positioning sleeve can be rotatably connected to the outer peripheral surface of the positioning sleeve; A plurality of inflation holes are evenly distributed at equal angles along the circumferential direction and are interconnected with the annular air inlet cavity and are located inside the inner circumferential opening of the annular balloon.

2. An improved balloon puncture device according to claim 1, characterized in that: The outer peripheral surface of the positioning sleeve is also formed with an inverted conical convex ring located between the annular balloon and the opening of the end of the positioning sleeve. The top outer diameter of the conical convex ring matches the length of the support rod.

3. An improved balloon puncture device according to claim 2, characterized in that: The positioning mechanism also includes a camera and / or a pressure sensor arranged on the positioning sleeve for monitoring the inflation state of the annular balloon.

4. The improved balloon puncture device according to claim 3, characterized in that: An annular cavity extending to the inside of the conical convex ring is provided on the inner circumferential surface of the positioning sleeve, and the camera includes at least one. Each of the cameras is sealed and embedded between the top outer wall of the conical convex ring and the top inner wall of the annular cavity and is distributed in sequence along the circumferential direction. The shooting end of each camera is set in the direction of the annular balloon.

5. An improved balloon puncture device according to claim 4, characterized in that: The upper end of the positioning sleeve is provided with a first threading hole extending to the inner side of the annular cavity, and at least one wire dividing hole communicating with the annular cavity is provided between the inner wall of the first threading hole and the outer peripheral surface of the positioning sleeve.

6. The improved balloon puncture device according to claim 3, characterized in that: A second threading hole is also provided between the upper end of the positioning sleeve and the upper inner wall of the air inlet groove. The pressure sensor is sealed and embedded in the second threading hole at an opening at one end of the air inlet groove. The detection end of the pressure sensor extends into the interior of the annular air inlet cavity.

7. The improved balloon puncture device according to claim 1, characterized in that: The outer circumferential surface of the positioning sleeve is also formed with multiple annular ribs that are arranged in sequence and at equal intervals along the axial direction of the positioning sleeve and are all located between the annular balloon and the sleeve. The pressure ring is interference-fitted outside the multiple annular ribs to increase the friction resistance between it and the positioning sleeve.

8. The improved balloon puncture device according to claim 4, characterized in that: Before the annular balloon is inflated, the distance between the end of each support rod away from the positioning sleeve and the outer peripheral surface of the positioning sleeve is the shortest and is not greater than the distance between the top edge of the conical convex ring and the outer peripheral surface of the positioning sleeve.

9. A method for using an improved balloon puncture device, characterized in that: The following steps are involved: S1: First, insert the puncture rod into the guide sleeve and make the bottom of the sealing mechanism detachably fixed on the top of the sealing seat, then hold the sealing seat and align the end of the puncture rod with the abdominal mark and puncture to complete the puncture of the abdominal wall; S2: When the puncture rod reaches the predetermined position in the abdominal cavity, the annular balloon is located inside the abdominal cavity, and the setting of the conical convex ring allows the uninflated annular balloon to smoothly extend into the abdominal cavity; with the help of an inflation tool such as a syringe, air is injected into the annular air inlet cavity through the interface and the air inlet of the one-way valve, and then the air is injected into the annular balloon through each inflation hole; S3: As the air pressure in the annular balloon increases, the annular balloon is gradually expanded, and each support rod gradually swings toward the direction of the pressure ring as the annular balloon expands. When the annular balloon is fully expanded, the top of the annular balloon reaches a horizontal state, thereby making each support rod also in a horizontal state; S4: Establish power and signal connections between each camera and an external display device through corresponding wires. The first wire threading hole and at least one branching hole are used for threading the corresponding wires. Since the shooting end of each camera is arranged in the direction of the annular balloon, when the medical staff inflates the annular balloon, each camera can display the expansion state of the annular balloon in real time in the form of dynamic images through the external display device. When the annular balloon is fully expanded, the medical staff will stop introducing air, thereby preventing the annular balloon from rupturing due to overfilling. In this way, the degree of inflation can be judged according to the deformation amplitude of the annular balloon; S5: Establish power and signal connection between the pressure sensor and the external pressure measuring equipment through the corresponding wires. The second threading hole is used for threading the corresponding wires. Since the pressure in the annular air inlet cavity is equal to the pressure in the annular balloon, when the pressure sensor detects that the pressure value in the annular air inlet cavity reaches the specified value, the medical staff will stop introducing air, thereby preventing the annular balloon from rupturing due to overfilling. In this way, the degree of inflation can be judged according to the pressure value of the annular balloon. S6: Push the pressure ring toward the annular balloon, and gradually reduce the distance between the pressure ring and the annular balloon, until each support rod and the bottom of the pressure ring are pressed tightly against the inner mucosa and the outer skin of the abdominal cavity respectively. Since the bottom of the pressure ring is provided with a flat surface, the contact area between the bottom of the pressure ring and the outer skin of the abdominal cavity is increased. Since each support rod is in a horizontal state after the annular balloon is fully expanded, the contact area between the top of the annular balloon and the inner mucosa of the abdominal cavity is increased, thereby increasing the stability and firm fixation of the sheath tube.

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