CN221242994U - Puncture sleeve with controllable puncture depth - Google Patents

Abstract

The utility model discloses a puncture cannula with controllable puncture depth, which comprises: the sleeve main body comprises a puncture rod, a handle and a puncture conical head, and the handle and the puncture conical head are respectively positioned at two ends of the puncture rod along the axial direction of the puncture rod; the limiting piece is sleeved outside the puncture rod and fixedly connected with the puncture rod; the limiting piece comprises a first air bag and a second air bag which are connected, the first air bag is positioned between the second air bag and the handle along the axial direction, and the second air bag is positioned between the first air bag and the puncture cone head; the first air bag comprises a first air chamber, the second air bag comprises a second air chamber, and the first air chamber and the second air chamber are mutually sealed and isolated and can be respectively inflated and/or deflated; the first air bag is used for abutting against the outer wall of the target object so as to limit the sleeve main body to move downwards along the axial direction; the second air bag is used for abutting against the inner wall of the target object so as to limit the sleeve body to move upwards along the axial direction. The utility model can control the puncture depth of the puncture cannula and the position of the puncture cannula in the use process after puncture.

Description

Puncture sleeve with controllable puncture depth

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a puncture cannula with controllable puncture depth.

Background

In laparoscopic surgery, a passageway is created for introducing laparoscopic instruments into the abdominal cavity for endoscopy and manipulation. The process of establishing a channel generally comprises the steps of: the choice of puncture site, incision and puncture, introduction instrument and endoscope. In terms of the puncturing process, the existing puncture cannula completely depends on the user to master the force to control the puncturing depth. In the actual puncturing process, the multi-layer fascia needs to be broken through, and the fascia cannot be punctured when the puncturing force is too small; when the puncture cannula is forced to puncture, the puncture cannula has obvious falling feel once breaking through fascia of the abdominal cavity, and the force is easy to control at the moment, so that the puncture is too deep to damage blood vessel viscera in the abdominal cavity.

In addition, in the operation process, as the angle of the vertical abdominal wall is not provided with a fixing device, the sleeve is easy to move up and down along the vertical abdominal wall in the actual operation process, and the sleeve is penetrated too deeply or causes the laparoscopic operation lever fulcrum to move downwards, so that the movement range of the instrument is too small; too shallow a penetration can result in the cannula coming out, making it difficult to restore the original position and even requiring re-penetration, increasing the risk of surgery, especially if the cannula slips out once it is in a highly difficult or emergency operation, with serious consequences.

Disclosure of utility model

The utility model aims to solve the problems that the puncture depth of a puncture cannula is difficult to control in the process of puncture and the puncture cannula is easy to shift in the process of use after puncture. The utility model provides a puncture cannula with controllable puncture depth, which can control the puncture depth and the position of the puncture cannula in the use process after puncture.

In order to solve the technical problems, an embodiment of the utility model discloses a puncture cannula with controllable puncture depth, comprising: the sleeve body comprises a puncture rod, a handle and a puncture cone head, and the handle and the puncture cone head are respectively positioned at two ends of the puncture rod along the axial direction of the puncture rod; the limiting piece is sleeved outside the puncture rod and fixedly connected with the puncture rod; the limiting piece comprises a first air bag and a second air bag which are connected, the first air bag is positioned between the second air bag and the handle along the axial direction, and the second air bag is positioned between the first air bag and the puncture cone head; the first air bag comprises a first air chamber, the second air bag comprises a second air chamber, and the first air chamber and the second air chamber are mutually sealed and isolated and can be respectively inflated and/or deflated; the first air bag is used for abutting against the outer wall of the target object so as to limit the sleeve main body to move downwards along the axial direction; the second air bag is used for abutting against the inner wall of the target object so as to limit the sleeve main body to move upwards along the axial direction.

By adopting the technical scheme, firstly, the first air chamber is inflated, the second air chamber is not inflated, then a user holds the handle, the puncture conical head is moved to puncture at a preselected proper position on a target object (such as an abdominal wall), and along with the gradual penetration of the puncture conical head into the target object (such as an abdominal cavity), the second air chamber also enters the target object until the lower end face of the first air chamber is abutted against the outer wall of the target object, the puncture conical head cannot continue to move downwards, and the puncture depth is the proper depth. Then the second air chamber is inflated, the upper end face of the gradually-bulged second air chamber is abutted against the inner wall (such as the inner wall of the abdomen) of the target object, the sleeve main body cannot move upwards due to the limitation of the second air chamber and the inner wall of the target object, and the sleeve main body cannot move upwards and downwards along the axial direction due to the fact that the first air chamber and the second air chamber are fixed relative to the target object (such as the inner wall of the abdomen), so that a user can conveniently introduce instruments and/or an endoscope, and the inside of the target object can be observed and operated.

In sum, the first air sac is used for limiting the sleeve main body to move down to be too deep along the axial direction, namely, the puncture cone head is prevented from puncturing too deep, and vascular viscera in the abdominal cavity are damaged; the second balloon serves to limit the axial upward movement of the cannula body, thereby disengaging the target, resulting in the need for re-penetration or other serious consequences. Namely, the first air bag and the second air bag are matched to fix the sleeve body relative to the target object, so that the puncture depth is controllable and the position of the sleeve body is controllable in the use process after puncture.

According to another embodiment of the present utility model, the limiting member further includes a connection portion fixedly connected to the puncture rod of the cannula body; along the axial direction, the first air bag and the second air bag are respectively positioned at the upper end and the lower end of the connecting part.

By adopting the technical scheme, the connecting part is connected with the first air bag and the second air bag on one hand, and the limiting part is integrally connected with the sleeve main body on the other hand, so that the first air bag and the second air bag are respectively connected with the puncture rod, the first air bag and/or the second air bag are prevented from moving relative to the puncture rod in the puncture process, and the limiting function of the puncture rod is not conveniently realized.

According to another specific embodiment of the present utility model, the inner circumference of the connecting portion is provided with an internal thread, the outer circumference of the puncture rod is provided with an external thread, and the internal thread and the external thread are connected.

According to another embodiment of the utility model, the sleeve body and the stop are of unitary construction.

By adopting the technical scheme, the connecting part and the puncture rod can realize the relative fixation of the sleeve main body and the limiting part in a threaded connection mode, and can also be designed into an integrated structure so as to ensure that the first air bag and the second air bag are fixed relative to the puncture rod.

According to another embodiment of the utility model, the first air bag is provided with a first air hole, and the first air hole is communicated with the first air chamber so as to enable the first air chamber to be inflated and/or deflated.

By adopting the technical scheme, the first air hole is connected with external equipment so as to inflate and/or deflate the first air chamber, so that the first air chamber bulges to realize the limit function of the first air chamber on the puncture rod.

According to another specific embodiment of the utility model, the first air bag is provided with a second air hole, the second air bag is provided with a third air hole, the connecting part is provided with an air flow pipeline, the air flow pipeline is sealed and isolated from the first air chamber, one end of the air flow pipeline along the axial direction passes through the first air chamber and is connected with the second air hole, and the other end of the air flow pipeline along the axial direction is communicated with the third air hole so as to allow the second air chamber to be inflated and/or deflated.

By adopting the technical scheme, the second air hole is connected with external equipment, so that external air can enter the air flow pipeline through the second air hole and then enter the second air chamber through the third air hole, and the purpose of inflating the second air chamber is achieved. Likewise, after the operation is completed, the gas in the second air chamber can flow reversely from the path to the outside, so as to retract the puncture cannula outside the abdominal cavity.

According to another embodiment of the utility model, the radial dimension of the first balloon and the second balloon is greater than the radial dimension of the connecting portion.

According to another embodiment of the utility model, the connecting portion is hollow cylindrical.

According to another embodiment of the utility model, the limiting member is i-shaped.

Drawings

FIG. 1 illustrates a perspective view of a penetration cannula according to an embodiment of the present utility model;

FIG. 2 shows a cross-sectional view of a penetration cannula according to an embodiment of the present utility model;

FIG. 3 shows a cross-sectional view of a stop member according to an embodiment of the utility model;

FIG. 4 shows a perspective view of a sleeve body according to an embodiment of the present utility model;

FIG. 5 shows a schematic structural view of a puncture cannula according to an embodiment of the present utility model, wherein the first gas chamber and the second gas chamber are filled with more gas;

FIG. 6 shows a second schematic structural view of a puncture cannula according to an embodiment of the present utility model, wherein the first air chamber and the second air chamber are in an inflated state;

FIG. 7 shows a third schematic view of the structure of a puncture cannula according to an embodiment of the present utility model, wherein both the first air chamber and the second air chamber are filled with a small amount of gas;

Fig. 8 shows a schematic structural view of a puncture cannula according to an embodiment of the present utility model, wherein the first air chamber is filled with more air and the second air chamber is not filled with air.

Reference numerals: 1. a puncture cannula; 2. a sleeve body; 20. a puncture rod; 200. an external thread; 21. a handle; 22. puncturing cone head; 3. a limiting piece; 30. a first air bag; 300. a first air chamber; 301. a first air hole; 302. a second air hole; 31. a second air bag; 310. a second air chamber; 311. a third air hole; 32. a connection part; 320. an air flow duct; 321. an internal thread; 331. a limit space; 4. an outer abdominal wall; 5. an inner abdominal wall; 6. an abdominal wall.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present utility model with specific examples. While the description of the utility model will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the utility model described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the utility model. The following description contains many specific details for the purpose of providing a thorough understanding of the present utility model. The utility model may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model.

The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1 to 4, the present application provides a penetration cannula 1 of controllable penetration depth, comprising a cannula body 2 and a limiter 3; the cannula body 2 includes a puncture rod 20, a handle 21, and a puncture tip 22, and the handle 21 and the puncture tip 22 are located at both ends of the puncture rod 20 along an axial direction (Z direction in fig. 1) of the puncture rod 20. Illustratively, the piercing tip 22 is pointed to facilitate piercing.

The limiting piece 3 is sleeved outside the puncture rod 20 and is fixedly connected with the puncture rod 20; the limiting member 3 includes a first balloon 30 and a second balloon 31 connected to each other, the first balloon 30 being located between the second balloon 31 and the handle 21 in the axial direction (shown in the Z direction in fig. 1), the second balloon 31 being located between the first balloon 30 and the puncture tip 22. That is, the handle 21, the first balloon 30, the second balloon 31 and the puncture tip 22 are disposed at intervals in this order in the axial direction downward (shown in the direction M in fig. 1).

The first air bag 30 includes a first air chamber 300, and the second air bag 31 includes a second air chamber 310, where the first air chamber 300 and the second air chamber 310 are sealed from each other and are capable of being inflated and/or deflated, respectively. That is, the first air chamber 300 and the second air chamber 310 are respectively inflated and/or deflated, and no gas interaction flow occurs between the two air chambers, so that the inflation degree of the inflation of the first air chamber 300 and the inflation degree of the inflation of the second air chamber 310 are respectively controlled, and further, the distance between the first air bag 30 and the second air bag 31 in the axial direction (shown in the Z direction in fig. 2) is controlled.

Referring to fig. 2 and 5, the first balloon 30 is configured to abut against an outer wall of a subject (e.g., the abdominal outer wall 4) to limit the movement of the cannula body 2 in an axially downward direction (indicated by the direction M in fig. 5); the second balloon 31 is adapted to abut against an inner wall of the object (e.g., the abdominal wall 5) to limit the axial upward movement (shown in the N-direction in fig. 5) of the cannula body 2. Illustratively, the first balloon 30 and the second balloon 31 axially form a limiting space 331, and the limiting space 331 accommodates a target (e.g., the abdominal wall 6), wherein an axially upward surface of the target is an outer wall of the target, and an axially downward surface of the target is an inner wall of the target, and a view direction of fig. 5 is taken as an example, and a portion below the inner wall of the target is an inner portion (e.g., an abdominal cavity) of the target.

For convenience of explanation and understanding, the following will be described with the object as an abdominal wall as an example.

Illustratively, because the first and second air chambers 300, 310 are inflated to different extents, the axial spacing between the first and second air chambers 30, 31 is different, thereby enabling adaptation to patients of different abdominal wall thicknesses. Specifically, referring to fig. 2 and 6, when the first air cell 300 and the second air cell 310 are inflated to the most filled state, the distance H1 between the first air cell 30 and the second air cell 31 in the axial direction (shown in the Z direction in fig. 6) is at a minimum; referring to fig. 2 and 7, when neither the first air cell 300 nor the second air cell 310 is inflated or only a small amount of air is inflated, the interval H2 between the first air cell 30 and the second air cell 31 in the axial direction is at a maximum; referring to fig. 2 and 5, when the first and second air cells 300 and 310 are filled with a part of air but do not reach the most filled state, the interval H3 between the first and second air cells 30 and 31 in the axial direction is greater than the minimum interval H1 and less than the maximum interval H2.

Illustratively, referring to fig. 2 and 6, the first balloon 30 and the second balloon 31 are spaced apart by 10mm to 40mm in the axial direction (shown in the Z-direction in fig. 6), that is, the spacing space may be adapted to a patient having an abdominal wall thickness of 10mm to 40 mm.

On the other hand, referring to fig. 2 and 8, when the second air chamber 310 is not inflated, the outer edge of the second air bag 31 is substantially flush with the outer periphery of a connecting portion 32 described later in the radial direction (shown in the X direction in fig. 8).

It is easy to understand that the first balloon 30 and the second balloon 31 of this embodiment are cylindrical, but during the inflation process, different positions of the first balloon 30 and the second balloon 31 have different degrees of bulge, so that bulge as shown in fig. 5 to 8 can be generated, but the limiting effect of the first balloon 30 and the second balloon 31 on the sleeve body 2 is not affected. That is, the present application is not limited to the shape of the first balloon 30 and the second balloon 31, as long as the sleeve body 2 can be restrained.

With the above technical solution, referring to fig. 2, 5 and 8, first air chamber 300 is inflated, second air chamber 310 is not inflated (as shown in fig. 8), then a user holds handle 21, moves puncture cone 22 to puncture at a preselected appropriate position on abdominal wall 6, and as puncture cone 22 gradually goes deep into the abdominal cavity, second air bag 31 also enters the abdominal cavity until the lower end surface of first air bag 30 abuts against abdominal outer wall 4, puncture cone 22 cannot continue moving downwards, and the puncture depth is the required appropriate depth (e.g. 8cm to 15 cm). Then, the second air chamber 310 is inflated, and the upper end surface of the gradually bulged second air chamber 31 abuts against the abdominal inner wall 5, so that the sleeve body 2 cannot move upwards due to the limitation of the second air chamber 31 and the abdominal inner wall 5, and the sleeve body 2 cannot move up and down along the axial direction (shown in the Z direction in fig. 5) because the first air chamber 30 and the second air chamber 31 are fixed on the abdominal wall 6, thereby facilitating the introduction of instruments and/or an endoscope by a user for observation and operation in the abdominal cavity.

In summary, the first balloon 30 is used to limit the sleeve body 2 from moving too far downwards (in the direction of M in fig. 5) in the axial direction, i.e. to avoid the puncture cone 22 from puncturing too far and damaging the blood vessel viscera in the abdominal cavity; the second balloon 31 serves to limit the axial upward movement of the cannula body 2 (shown in the N-direction in fig. 5) and thus the detachment of the abdominal wall 6, resulting in the need for re-puncturing or other serious consequences. That is, the first balloon 30 and the second balloon 31 cooperate to fix the cannula body 2 relative to the abdominal wall 6, thereby ensuring a controllable penetration depth and a controllable position of the cannula body 2 during use after penetration.

Referring to fig. 1 to 3, in some possible embodiments, the stop 3 further comprises a connecting portion 32, the connecting portion 32 being fixedly connected to the piercing rod 20 of the cannula body 2; in the axial direction (shown in the Z direction in fig. 1), the first airbag 30 and the second airbag 31 are respectively located at the upper and lower ends of the connecting portion 32. Illustratively, the connecting portion 32 connects the first air bag 30 and the second air bag 31 on one hand, and integrally connects the limiting member 3 to the sleeve body 2 on the other hand, so as to realize the connection between the first air bag 30 and the second air bag 31 and the puncture rod 20, and avoid the movement of the first air bag 30 and/or the second air bag 31 relative to the puncture rod 20 during the puncture process, thereby being inconvenient to realize the limiting function. Illustratively, the connecting portion 32 is hollow and cylindrical and is sleeved on the puncture rod 20.

Referring to fig. 1 and 5, in some possible embodiments, the radial dimensions of the first balloon 30 and the second balloon 31 are greater than the radial dimensions of the connection 32. Illustratively, the first balloon 30, the second balloon 31, and the connecting portion 32 are all cylindrical and coaxial. The portions of the first balloon 30 and the second balloon 31 protruding from the connecting portion 32 in the radial direction (shown in the X direction in fig. 1) form a limiting space 331 in the axial direction (shown in the Z direction in fig. 5) to accommodate the abdominal wall 6 in this limiting space 331, thereby achieving the relative fixation of the puncture cannula 1 and the abdominal wall 6.

Illustratively, the spacing member 3 is i-shaped in a state in which both the first air chamber and the second air chamber are inflated.

Referring to fig. 1, 3 and 4, in one embodiment, an inner circumference of the connection portion 32 is provided with an internal thread 321, and an outer circumference of the penetration rod 20 is provided with an external thread 200, and the internal thread 321 is connected with the external thread 200. In yet another embodiment, the cannula body 2 and the limiter 3 are of unitary construction. That is, the connection portion 32 and the puncture rod 20 may be fixed to each other by screwing the sleeve body 2 and the stopper 3, or may be designed as an integrated structure to secure the first balloon 30 and the second balloon 31 to each other with respect to the puncture rod 20.

However, the connection mode of the sleeve body 2 and the limiting piece 3 is not limited in the application, so long as the relative fixation of the sleeve body 2 and the limiting piece 3 is ensured.

Referring to fig. 1 and 2, in some possible embodiments, the first air bladder 30 is provided with a first air hole 301, and the first air hole 301 and the first air chamber 300 are in communication for inflating and/or deflating the first air chamber 300. Illustratively, the first air port 301 is coupled to an external device (e.g., an inflator) to inflate and/or deflate the first air chamber 300, causing the first air bladder 30 to bulge to perform its restraining function on the piercing rod 20.

Referring to fig. 1 and 2, in some possible embodiments, the first air bag 30 is provided with a second air hole 302, the second air bag 31 is provided with a third air hole 311, the connecting portion 32 is provided with an air flow pipe 320, the air flow pipe 320 is sealed from the first air chamber 300, one end of the air flow pipe 320 in the axial direction (shown in the Z direction in fig. 2) passes through the first air chamber 300 and is connected with the second air hole 302, and the other end of the air flow pipe 320 in the axial direction is communicated with the third air hole 311 for inflating and/or deflating the second air chamber 310. Illustratively, the second air holes 302 are coupled to an external device (e.g., an inflator) to enable external air to enter the air flow conduit 320 from the second air holes 302 and then to the second air chamber 310 from the third air holes 311 for the purpose of inflating the second air chamber 310. Likewise, after the operation is completed, the gas in the second air chamber 310 may flow reversely from the above path to the outside, so as to retract the puncture cannula 1 outside the abdominal cavity.

While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the utility model with reference to specific embodiments, and it is not intended to limit the practice of the utility model to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present utility model.

Claims (9)

1. A penetration cannula of controllable penetration depth, comprising:

The sleeve body comprises a puncture rod, a handle and a puncture cone head, and the handle and the puncture cone head are respectively positioned at two ends of the puncture rod along the axial direction of the puncture rod;

The limiting piece is sleeved outside the puncture rod and fixedly connected with the puncture rod; the limiting piece comprises a first air bag and a second air bag which are connected, the first air bag is positioned between the second air bag and the handle along the axial direction, and the second air bag is positioned between the first air bag and the puncture cone head; the first air bag comprises a first air chamber, the second air bag comprises a second air chamber, and the first air chamber and the second air chamber are mutually sealed and isolated and can be respectively inflated and/or deflated;

The first air bag is used for abutting against the outer wall of the target object so as to limit the sleeve main body to move downwards along the axial direction; the second air bag is used for abutting against the inner wall of the target object so as to limit the sleeve main body to move upwards along the axial direction.

2. The penetration cannula of controllable penetration depth of claim 1, wherein the limiter further comprises a connection portion fixedly connected to the penetration rod of the cannula body; along the axial direction, the first air bag and the second air bag are respectively positioned at the upper end and the lower end of the connecting part.

3. The penetration cannula of controllable penetration depth of claim 2, wherein the inner circumference of the connecting portion is provided with internal threads and the outer circumference of the penetration rod is provided with external threads, the internal threads being coupled to the external threads.

4. The penetration cannula of controllable penetration depth of claim 1, wherein the cannula body and the limiter are of unitary construction.

5. The penetration cannula of claim 1, wherein the first balloon is provided with a first air hole, the first air hole being in communication with the first air chamber for inflation and/or deflation of the first air chamber.

6. The penetration cannula of claim 2, wherein the first balloon is provided with a second air hole, the second balloon is provided with a third air hole, the connecting portion is provided with an air flow pipeline, the air flow pipeline is sealed and isolated from the first air chamber, one end of the air flow pipeline along the axial direction passes through the first air chamber and is connected with the second air hole, and the other end of the air flow pipeline along the axial direction is communicated with the third air hole so as to allow the second air chamber to be inflated and/or deflated.

7. The penetration cannula of controllable penetration depth of claim 2, wherein a radial dimension of the first balloon and the second balloon is greater than a radial dimension of the connecting portion.

8. The penetration cannula of controllable penetration depth of claim 7, wherein the connecting portion is hollow cylindrical.

9. The penetration cannula of controllable penetration depth of claim 1, wherein the limiter is i-shaped.