Disposable puncture outfit for laparoscope

Abstract

The utility model belongs to the field of medical instruments, and relates to a disposable puncture outfit for a laparoscope, which comprises a tubular puncture cannula, a puncture core, a sheath cap component and an airtight maintaining system. The puncture core is detachably inserted into an inner cavity of the puncture cannula, the head conical structure is matched with the far-end slope of the cannula, and a limiting clamping groove is formed in the tail end of the puncture core. The sheath cap assembly comprises an integrated rotary locking and fixing cover and a layered positioning and guiding cover, the locking and fixing cover and the near end of the puncture cannula are circumferentially locked through bidirectional threads, and a guiding sliding rail is arranged on the inner wall of the positioning and guiding cover; the air tightness maintaining system comprises a linkage structure of a choke valve and an air injection switch, and a choke valve spring seat is fixed to an air injection valve cavity in an interference fit mode to form dynamic sealing connection; the far-end port of the tubular puncture cannula forms an acute-angle guide inclined plane, and the other end of the tubular puncture cannula is provided with an anti-backflow device in an inner cavity; by means of the anti-backflow design, the acute angle guide inclined plane and the sterile disposable use characteristic, the operation safety is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of medical apparatus and instruments, and relates to a disposable puncture outfit for laparoscopes. BACKGROUND

[0002] The disposable puncture outfit for laparoscopes, as the core instrument in laparoscopic surgery, its design and function are self-evident. In the fine operation process of laparoscopic surgery, this instrument plays a key role in opening a safe and stable surgical channel on the abdominal wall, enabling laparoscopes and other fine surgical instruments to smoothly enter the abdominal cavity and complete a series of complex medical operations. As a major pillar of minimally invasive surgery technology, laparoscopic surgery has gradually become the preferred method for treating various abdominal diseases due to its small trauma, fast recovery, and fewer postoperative complications, and has shown its irreplaceable value in diagnosis and treatment.

[0003] The disposable puncture outfit for laparoscopes is designed ingeniously and has comprehensive functions, and its performance is directly related to the overall safety and success rate of surgery. In the initial stage of surgery, the puncture sleeve is precisely inserted into the predetermined position of the abdominal wall with the assistance of the puncture core. Subsequently, the puncture core is carefully removed, leaving the puncture sleeve as a channel for surgical instruments to enter and exit the abdominal cavity. In order to maintain a clear surgical field and sufficient operating space, a stable pneumoperitoneum environment needs to be maintained during surgery, which is usually achieved by injecting CO2 gas into the abdominal cavity. The establishment of pneumoperitoneum not only provides a good operating space for surgery, but also reduces damage to surrounding tissues during surgery.

[0004] However, the traditional design of the disposable puncture outfit for laparoscopes faces a technical problem that needs to be solved urgently after the puncture core is pulled out - blood backflow. This phenomenon is particularly prominent in laparoscopic surgery, as the pressure inside the abdominal cavity is naturally higher than that outside the body, and blood and body fluids may flow back to the outside through the inner cavity of the puncture sleeve under the action of the pressure difference. This problem not only affects the smooth progress of surgery, but also may have a series of serious consequences.

[0005] Firstly, the backflow of blood may contaminate the outside of the puncture sleeve, surgical instruments, and the entire surgical area. Bacteria and other microorganisms carried in the blood may spread to the surgical incision and the abdominal cavity, greatly increasing the risk of intraoperative infection. Infection is one of the common complications after surgery, and may cause delayed wound healing, sepsis and other serious consequences when severe.

[0006] Secondly, blood reflux can also directly affect the clarity of the surgical field. Once blood enters the laparoscope lens or the surgical field, it will obscure the surgeon's vision, reducing the precision and accuracy of surgical operations. In minimally invasive surgery, a clear field of vision is crucial to the success of the operation, and any obscuring of the field of vision can increase the risk and difficulty of the operation.

[0007] In addition, in order to remove the refluxing blood, medical personnel may need to perform additional operations such as flushing or wiping the surgical instruments and surgical area. These additional operations not only prolong the operation time, but also increase the complexity and uncertainty of the operation. In a tense surgical environment, every second counts, and additional operating time can mean more risk and challenge.

[0008] Most importantly, blood reflux can also pose a threat to patient safety. If the blood reflux phenomenon is severe, the patient may lose more blood, leading to decreased blood volume and even life-threatening conditions such as hypotension and shock. In extreme cases, blood reflux can endanger the patient's life and safety, which is a risk that must be strictly avoided during surgery.

[0009] The airtight maintenance system of the traditional puncture device mainly focuses on preventing gas leakage to ensure the stability of the pneumoperitoneum. Usually, structures such as air blocking valves and sealing caps are used to achieve this goal, which can maintain good air blocking and sealing properties at a specific air pressure (such as 4kPa). However, these structures do not fully consider the special case of blood reflux after the puncture core is removed. Therefore, after the puncture core is removed, the inner cavity of the puncture sleeve can become a potential blood reflux channel, especially under conditions of high intra-abdominal pressure, the risk of blood reflux is more significant. Practical new type content

[0010] Therefore, the purpose of the present application is to provide a disposable puncture device for laparoscopy that can effectively prevent blood reflux after the puncture core is removed while maintaining the stability of the pneumoperitoneum.

[0011] In order to achieve the above object, the utility model provides the following technical scheme: disposable laparoscope puncture outfit, including tubular puncture sleeve, puncture core, sheath cap subassembly and airtight maintenance system, the puncture core is detachable and is inserted into the puncture sleeve inner chamber, the head portion conical structure is matched with the sleeve far end bevel, and the puncture core tail end is equipped with limiting slot; the sheath cap subassembly includes integrated rotary locking fixed cover and layered positioning guide cover, the locking fixed cover realizes the circumferential locking through the two -way thread and the puncture sleeve proximal end, and the positioning guide cover inner wall is equipped with guide slide rail; the airtight maintenance system contains the linkage structure of air resistance valve and gas injection switch, and the air resistance valve spring seat is fixed in the gas injection valve door cavity through interference fit, and forms dynamic sealing connection; the inner diameter specification of tubular puncture sleeve is 5mm, 10mm or 12mm, and the far end port forms sharp angle guide bevel, and the other end port and in the sleeve are provided with multiple anti -backflow devices.

[0012] Optionally, the anti-backflow device is a valve structure, which includes a circular ring structure installed in the puncture sleeve and a plurality of valves installed on the circular ring structure.

[0013] Optionally, the connection structure of the puncture sleeve and the puncture core specifically includes: two groups of axial buckle grooves are symmetrically distributed on the inner side of the sleeve proximal end, and an elastic buckle flange is correspondingly arranged at the tail end of the puncture core; an annular positioning step is arranged in the middle of the core body, and gap cooperation is formed with the inner diameter of the sleeve; in the puncture state, the head end taper of the puncture core exceeds the sleeve far end bevel by 5-8mm.

[0014] Optionally, the connection structure of the sheath cap subassembly includes: the inner wall of the rotary locking fixed cover is double-headed rectangular thread, the pitch is 2.5mm, and the thread engagement length of the outer wall of the puncture sleeve is greater than or equal to 1.5 turns; the slide rail groove of the positioning guide cover is a spiral continuous guide structure, the guide angle is 15±2°, and the groove depth is 0.8-1.0mm; the bottom of the sealing cap is provided with an annular recessed groove, and interference sealing connection is formed with the top flange of the sleeve seat.

[0015] Optionally, the dynamic sealing connection of the airtight maintenance system includes: the valve core rod of the air resistance valve and the push rod of the gas injection switch are connected through a universal hinge, and the hinge swing angle is less than or equal to 8°; a luer lock connector is arranged at the outlet end of the gas injection valve door, and three-prism-shaped anti-skid teeth are distributed on the inner wall of the connector.

[0016] Optionally, a pressure sensing spring is arranged at the bottom of the gas injection switch, and the spring compression stroke and the gas injection valve opening degree have a linear relationship of 1:1.2.

[0017] Optionally, it further includes the connection structure of the gas laparoscope needle assembly: the front end of the inflation tube is connected with the two-way valve through a clamping sleeve type quick connector, and an O-shaped sealing ring is arranged in the connector; the puncture tube and the handle are fixed by hot riveting, and the riveting points are uniformly distributed at an interval of 120°.

[0018] The utility model discloses a puncture device for laparoscope, which has the advantages of high safety, convenient operation, stable pneumoperitoneum, and the like. The innovative anti-backflow design automatically closes after the puncture core is pulled out, effectively prevents the backflow of blood and body fluid in the abdominal cavity, greatly reduces the risk of intraoperative infection, and ensures the safety of the operation process. The design of the acute angle guide inclined surface makes the puncture process smoother, reduces the damage to the abdominal wall tissue, and further improves the safety of the operation.

[0019] In addition, the precise fit of the puncture core and the sleeve ensures the close connection of the two during the operation process, prevents accidental falling; the rotation locking and positioning guide design of the sheath cap not only makes the installation and disassembly of the puncture device extremely simple, but also provides accurate guidance for the entry and exit of surgical instruments, enhancing the convenience of operation. The ingenious combination of the air blocking valve, the air injection switch and the luer lock joint forms a stable airtight maintenance system, ensuring the stability of the pneumoperitoneum during the operation process, and creating good conditions for the operation.

[0020] The design of multiple specifications and the application of quick connectors make the puncture device adapt to different sizes of surgical instruments and various surgical needs, improving the adaptability and universality of the instrument. The minimally invasive channel design reduces the trauma of the operation on the patient, speeds up the postoperative recovery, and also reduces the incidence of surgical complications. Disposable use and standardized production ensure the sterility and reliability of the product, reduce the operation and production cost of the hospital, and fully demonstrate the important value and economic benefit of the utility model in modern minimally invasive surgery.

[0021] The other advantages, objects and features of the utility model will be described in the subsequent specification to some extent, and to some extent, it will be obvious to those skilled in the art based on the study of the following text or can be taught from the practice of the utility model. The objects and other advantages of the utility model can be realized and obtained by the following specification. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to make the purpose, technical scheme and advantages of the utility model more clear, the preferred detailed description of the utility model will be combined with the drawings as follows, in which:

[0023] Figure 1 It is the overall structure schematic diagram of the utility model;

[0024] Figure 2 It is the internal schematic diagram of the puncture sleeve of the utility model;

[0025] Figure 3 It is Figure 2 The middle valve structure opening schematic diagram;

[0026] Figure 4 This is a schematic diagram of the valve structure;

[0027] Figure 5 for Figure 1 Top view;

[0028] Figure 6 for Figure 2 Top view.

[0029] Attached reference numerals: 1. Puncture core; 2. Puncture cannula; 3. Inflation switch; 4. Locking cap; 5. Positioning guide cap; 6. Inflation valve; 7. Air choke valve; 8. Sealing cap; 9. Valve structure. Detailed Implementation

[0030] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0031] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0032] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0033] Specific Implementation Example 1,

[0034] Please see Figures 1-6A disposable laparoscopic puncture device is a medical device designed for laparoscopic surgery, which establishes a safe and stable minimally invasive channel through the abdominal wall, allowing laparoscopes and other surgical instruments to enter the abdominal cavity for operation. The puncture device adopts a sterile disposable design, has a delicate structure and comprehensive functions, aims to improve surgical safety, operation convenience and patient comfort, and solves the problem of blood backflow after the traditional puncture core 1 is pulled out. Specifically, it comprises:

[0035] 1. Puncture cannula 2

[0036] The puncture cannula 2 is the core component of the puncture device, which is a hollow tubular structure with an inner diameter of 5mm, 10mm or 12mm to adapt to different sizes of surgical instruments. The distal port is designed as an acute angle guide slope, which can effectively reduce the resistance to abdominal wall tissue during puncture, thereby reducing the trauma during puncture. The other end (proximal end) of the puncture cannula 2 is connected to the sheath cap assembly through threads, and the port and the cannula are provided with multiple anti-backflow devices.

[0037] In this embodiment, the anti-backflow device adopts a valve structure 9, which is composed of a circular ring structure installed on the inner wall of the puncture cannula 2 and a plurality of valves attached to the circular ring. The valve is usually made of flexible material (such as silicone or rubber) and has a one-way opening function. When the puncture core 1 or surgical instrument passes through, the valve is pushed open, allowing the instrument to pass smoothly; after the puncture core 1 is pulled out, the valve is automatically closed under the action of the pressure in the abdominal cavity, forming a seal and effectively preventing blood and body fluids from flowing back to the body. This design solves the problem of blood backflow caused by pressure difference after the traditional puncture core 1 is removed, avoiding the risk of infection, blurred vision and additional operation during surgery.

[0038] 2. Puncture core 1

[0039] The puncture core 1 is an auxiliary component during puncture, which can be detachably inserted into the inner cavity of the puncture cannula 2. Its head is conical in structure, perfectly matching the acute angle guide slope at the distal end of the puncture cannula 2, ensuring smooth guidance of the cannula into the abdominal wall during puncture. In the puncture state, the conical surface of the puncture core 1 head end protrudes 5-8mm beyond the distal end slope of the cannula, which helps to better penetrate the abdominal wall tissue during puncture.

[0040] The puncture core 1 has a limiting clamping groove at the end, which cooperates with the two groups of axial clamping groove distributed symmetrically on the inner side of the proximal end of the puncture cannula 2. The puncture core 1 has a elastic clamping flange at the end, which is firmly connected with the cannula through the clamping structure to prevent accidental falling of the puncture core 1 during puncture. In addition, the puncture core 1 has a ring-shaped positioning step in the middle, which cooperates with the inner diameter of the cannula to ensure stability and concentricity during insertion.

[0041] 3. Sheath cap assembly

[0042] The sheath cap assembly is composed of a one-piece rotating locking fixed cover 4 and a layered positioning guide cover 5, responsible for connecting the puncture cannula 2 and providing guidance for surgical instruments.

[0043] Rotating locking fixed cover 4: Its inner wall adopts double-head rectangular thread design, with a pitch of 2.5mm, and the thread engagement length with the outer wall of the puncture cannula 2 is not less than 1.5 turns. Through the bidirectional thread, the proximal end of the puncture cannula 2 is circumferentially locked, ensuring the firm connection of the sheath cap and the cannula, preventing loosening during the operation.

[0044] Positioning guide cover 5: The inner wall is provided with a spiral continuous guide rail, with a guide angle of 15±2° and a groove depth of 0.8-1.0mm. This slide rail structure provides precise guidance for the insertion and removal of surgical instruments, reduces the possibility of misoperation, and improves the convenience of operation.

[0045] Sealing design: The bottom of the sealing cap 8 is provided with an annular recessed groove, which forms an interference sealing connection with the flange at the top of the puncture cannula 2 seat, ensuring the air tightness of the whole puncture device.

[0046] 4. Air-tightness maintenance system

[0047] The air-tightness maintenance system is used to maintain a stable pneumoperitoneum environment during the operation, including the linkage structure of the air-blocking valve 7 and the gas injection switch 3.

[0048] Air-blocking valve 7: Its spring seat is fixed in the cavity of the gas injection valve 6 through interference fit, forming a dynamic sealing connection. The valve core rod of the air-blocking valve 7 is connected with the push rod of the gas injection switch 3 through a universal hinge, with a hinge swing angle not exceeding 8°, realizing flexible dynamic adjustment.

[0049] Gas injection switch 3: The bottom is provided with a pressure-sensitive spring, and the spring compression stroke has a linear relationship of 1:1.2 with the opening degree of the gas injection valve 6, which can accurately control the injection amount of CO2 gas and ensure the stability of the pneumoperitoneum pressure. The outlet end of the gas injection valve 6 is provided with a Luer lock connector, and the inner wall of the connector is distributed with three-prism-shaped anti-slip teeth, which is more firm and reliable when connected with the gas source.

[0050] 5. Pneumoperitoneum needle assembly (optional)

[0051] The puncture device can be equipped with a pneumoperitoneum needle assembly for establishing pneumoperitoneum before puncture. Its structure includes:

[0052] Inflation tube: The front end is connected with the two-way valve through a snap-on quick connector, and an O-ring is arranged in the connector to ensure air tightness.

[0053] Puncture tube and handle: Hot riveting is adopted, and the riveting points are evenly distributed in a 120° circle to ensure the connection strength.

[0054] Two-way valve: The outer edge of the knob is provided with anti-slip knurling, which is convenient for medical staff to operate.

[0055] Specific embodiment 2,

[0056] In this embodiment, the valve structure 9 adopts a transparent structure, and the figure only shows that the valve structure is arranged at the port, but according to requirements, at least one or more valve structures are arranged in the sleeve, and blood flow is prevented.

[0057] The use method comprises the following steps:

[0058] 1. Puncture preparation: insert the puncture core 1 into the puncture sleeve 2, ensure that the tapered head of the puncture core 1 is matched with the bevel of the distal end of the sleeve, and is locked with the buckle groove on the inner side of the sleeve through the limiting clamping groove.

[0059] 2. Puncture operation: insert the puncture device into the abdominal wall at a proper angle through the acute angle guide bevel at the distal end of the puncture sleeve 2, and the tapered head of the puncture core 1 guides the puncture process.

[0060] 3. Pull out the puncture core 1: after the puncture is completed, carefully pull out the puncture core 1, and the valve structure 9 in the puncture sleeve 2 is automatically closed to prevent blood backflow.

[0061] 4. Establish pneumoperitoneum: inject CO2 gas through the gas injection switch 3, and maintain a stable pneumoperitoneum environment by using the airtight maintenance system.

[0062] 5. Operation operation: the surgical instrument enters the abdominal cavity through the puncture sleeve 2, and the slide rail of the positioning guide cover 5 provides accurate guidance.

[0063] 6. End of operation: after the operation is completed, pull out the puncture sleeve 2, and the operation area is treated regularly.

[0064] The anti-backflow valve structure 9 of the utility model effectively prevents blood backflow after the puncture core 1 is pulled out, the acute angle guide bevel reduces the puncture wound, and the sterile one-time use reduces the risk of infection. The buckle matching of the puncture core 1 and the sleeve, the rotary locking of the sheath cap and the positioning guide design simplify the operation process. The dynamic sealing connection of the air resistance valve 7, the gas injection switch 3 and the luer lock connector ensures that the pneumoperitoneum pressure is constant.

[0065] Finally, it should be explained that the above embodiments are only used to illustrate the technical solutions of the utility model and are not limited. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions, and all should be covered in the claim range of the utility model.

Claims

1. A disposable laparoscopic trocar, characterized by, The application relates to a tubular puncture sleeve, a puncture core, a sheath cap assembly and an air-tight maintenance system; the puncture core is detachably inserted into the inner cavity of the puncture sleeve, the head part of the puncture core is adapted to the inclined surface at the distal end of the sleeve through a conical structure, and a limiting slot is arranged at the tail end of the puncture core; the sheath cap assembly comprises an integrated rotary locking fixed cover and a layered positioning guide cover, the locking fixed cover is locked in the circumferential direction through a bidirectional thread and the proximal end of the puncture sleeve, and a guide slide rail is arranged on the inner wall of the positioning guide cover; the air-tight maintenance system comprises a linkage structure of a gas blocking valve and a gas injection switch, and a spring seat of the gas blocking valve is fixed in the cavity of the gas injection valve through interference fit, so as to form a dynamic sealing connection. The inner diameter of the tubular puncture sleeve is 5mm, 10mm or 12mm, the distal end port forms an acute angle guide inclined surface, the other end port and a plurality of anti-backflow devices are arranged in the sleeve.

2. The single-use laparoscopic trocar according to claim 1, wherein The anti-backflow device is a valve structure, which comprises a circular ring structure arranged in the puncture sleeve and a plurality of valves arranged on the circular ring structure.

3. The single-use laparoscopic trocar according to claim 1, wherein The connection structure of the puncture sleeve and the puncture core comprises: two groups of axial buckle grooves are symmetrically distributed on the inner side of the proximal end of the sleeve, and an elastic buckle flange is arranged at the tail end of the puncture core; an annular positioning step is arranged in the middle of the core body, and a gap fit is formed with the inner diameter of the sleeve; in the puncture state, the conical surface of the head end of the puncture core exceeds the distal end inclined surface of the sleeve by 5-8mm.

4. The single-use laparoscopic trocar of claim 1, wherein, The connection structure of the sheath cap assembly comprises: the inner wall of the rotary locking fixed cover is a double-headed rectangular thread with a pitch of 2.5mm, and the thread length of the outer wall of the puncture sleeve is engaged with the sleeve by 1.5 turns or more; the slide rail groove of the positioning guide cover is a spiral continuous guide structure, the guide angle is 15+ / -2 degrees, and the groove depth is 0.8-1.0mm; an annular recessed groove is arranged at the bottom of the sealing cap, and an interference sealing connection is formed between the annular recessed groove and the flange at the top of the sleeve seat.

5. The single-use laparoscopic trocar according to claim 1, wherein The dynamic sealing connection of the air-tight maintenance system comprises: the valve core rod of the gas blocking valve and the push rod of the gas injection switch are connected through a universal hinge, and the swing angle of the hinge is less than or equal to 8 degrees; a luer lock connector is arranged at the outlet end of the gas injection valve, and three-prism anti-skid teeth are arranged on the inner wall of the connector.

6. The single-use laparoscopic trocar according to claim 5, wherein A pressure sensing spring is arranged at the bottom of the gas injection switch, and the linear relationship between the compression stroke of the spring and the opening degree of the gas injection valve is 1:1.

2.

7. The single-use laparoscopic trocar according to claim 1, wherein The connection structure of the gas insufflation needle assembly comprises: the front end of the inflation tube is connected with the two-way valve through a clamping sleeve type quick connector, an O-shaped sealing ring is arranged in the connector, the puncture tube and the handle are fixed through hot riveting, the riveting points are uniformly distributed at an interval of 120 degrees, and anti-skid knurling is arranged on the outer edge of the knob of the two-way valve.

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