Cannula puncture outfit

Abstract

The utility model belongs to the field of medical instruments, and provides a cannula puncture outfit which comprises a handle and a platy outfit body fixedly connected with the handle, the tail end of the outfit body is an arc-shaped head, a cannula hole is formed in the tail end of the outfit body, a cannula is detachably fixed in the cannula hole, and the cannula is connected with the handle. The length of the long axis of the sleeve hole in the extending direction of the transformer body is larger than the diameter of a sleeve body of the sleeve but smaller than the diameter of an inner flange plate of the sleeve in an undeformed state, and the length of the short axis of the sleeve hole is slightly smaller than the diameter of the sleeve body of the sleeve. According to the cannula puncture outfit with the structure, the cannula can be conveniently placed in a surgical site, after the cannula is placed in the surgical site, the cannula and the puncture outfit can be separated through simple rotation, and surgical operation is greatly simplified.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of medical apparatus and instruments, and particularly relates to a cannula puncture device. BACKGROUND

[0002] In the diagnosis, treatment and operation process of joint diseases, an arthroscope is a commonly used medical instrument. In the use process of the arthroscope, the edge part of the joint in the operation can be damaged, so the arthroscope is usually used in combination with a protective device. At present, a cannula is usually used to assist the arthroscope to enter the operation site from the established soft tissue passage in arthroscopic surgery.

[0003] However, the cannula is difficult to place in actual use due to the lack of a puncture device that can be used in combination. In addition, the existing cannula also has the problems of liquid overflow from the external thread of the tube body and difficulty in discharging the liquid, which affects the operation. SUMMARY

[0004] To solve the problems of difficult cannula placement operation, overflow and difficulty in discharging the liquid in the prior art, the utility model provides a cannula puncture device. When the cannula is placed by using the cannula puncture device, the cannula fixed on the puncture device can be separated by simple rotation, thereby simplifying the operation of placing the cannula.

[0005] The utility model discloses a kind of cannula puncture devices, the cannula puncture device includes handle, and the plate-shaped body of fixed connection with handle, the cannula to be aimed at includes the tube body with inside being equipped with through channel, the both ends of tube body are along tube body radial outer side, and inside flange plate and outside flange plate are formed at both ends respectively, the end of body is arc head, cannula hole is set in the end of body, cannula is detachably fixed in the cannula hole, the long axis length of cannula hole along the extension direction of body is greater than the diameter of the tube body of cannula, but less than the diameter of inside flange plate of cannula in undeformed state, the short axis length of cannula hole is slightly less than the diameter of the tube body of cannula.

[0006] When cannula is placed into cannula hole, because the short axis length of cannula hole is slightly less than the diameter of the tube body of cannula, so the body of puncture device generates clamping action to cannula;Because the long axis length of cannula hole is greater than the diameter of the tube body of cannula and less than the diameter of inside flange plate of cannula in undeformed state, cannula does not slip when being placed into cannula hole, and after completing the placement of cannula, rotate puncture device to slide out and separate cannula and cannula puncture device.

[0007] Preferably, the cannula hole includes a circular area on one side of the handle, an arc-shaped area on one side of the arc-shaped head, and a square area between the arc-shaped area and the circular area. The intersection of the circular area and the square area and the intersection of the arc-shaped area and the square area have equal short axis lengths and are tangent to the upper and lower edges of the square area. The cannula hole with the above shape facilitates the clamping and removal of the cannula and reduces the damage to the human body caused by the cannula puncture device.

[0008] Preferably, the body is provided with scale lines at a fixed interval from the end of the arc-shaped head.

[0009] Before the cannula is inserted, the cannula puncture device can be independently inserted into the surgical site, and the scale lines on the body are read to use the reading as a reference for selecting the length of the cannula. As a preferred embodiment, the fixed interval of the scale lines is 10 mm.

[0010] Preferably, the outer flange plate is provided with a clamping groove, and the cover is provided with a clamping protrusion corresponding to the clamping groove. The cover is elastic, and a through hole is provided in the center for inserting surgical instruments such as arthroscopes. The cover is detachably connected to the outer flange plate through the cooperation of the clamping groove and the clamping protrusion. The diameter of the through hole in the undeformed state is smaller than the diameter of the internal passage of the pipe body.

[0011] Preferably, a sealing sheet is fixedly arranged in the through passage inside the pipe body, and a cutout is provided in the center of the sealing sheet to ensure the entry and exit of the instrument and effectively prevent the overflow of the irrigation fluid.

[0012] Preferably, the pipe body is provided with external threads, and a silica gel nut is arranged on the pipe body through corresponding internal threads.

[0013] After the cannula is inserted into the surgical site, the silica gel nut is rotated to tightly adhere to the outer layer of the incision, which can improve the fixation effect between the joint soft tissue and the cannula and provide a more stable protection channel.

[0014] Preferably, a drainage cavity is arranged inside the pipe body in the direction of the pipe body extension, and the drainage cavity penetrates out of the internal flange plate. The drainage cavity is turned at the external flange plate and penetrates out of the side of the external flange plate to form a liquid outlet end.

[0015] Preferably, a plug is arranged on the liquid outlet end of the drainage cavity at the external flange plate to cooperate with the liquid outlet end. The plug can be inserted into the drainage cavity from the liquid outlet end when drainage is not needed, and the plug can be removed when drainage is needed. This does not affect the sealing between the cannula and the incision, and does not affect the existing overflow function of the cannula.

[0016] The cannula is made of an elastic material, and specifically can be made of silicone rubber or TPU.

[0017] The cannula puncture device provided by the utility model has the following beneficial effects:

[0018] 1) By arranging a cannula hole with a diameter smaller than the diameter of the cannula pipe body at the end of the body and detachably fixing and installing a cannula in the cannula hole, the cannula can be conveniently inserted into the surgical site. After the cannula is inserted into the surgical site, the cannula and the puncture device can be separated by simple rotation, greatly simplifying the surgical operation.

[0019] 2) The scale is set on the body of the trocar at fixed intervals. Before the cannula is placed, the trocar can be inserted into the surgical site alone to determine and select the appropriate cannula;

[0020] 3) The drainage cavity and plug are set on the cannula. Without affecting the sealing of the cannula, the liquid at the surgical site can be drained to reduce its impact on the surgical operation. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the trocar;

[0022] Figure 2 It is a schematic diagram of the trocar; Figure 1 It is an enlarged view of part A;

[0023] Figure 3 It is a front view of the cannula;

[0024] Figure 4 It is a front view of the cannula; Figure 4 It is a front view of the cannula;

[0025] Figure 5 It is a schematic diagram of the cannula being squeezed and loaded into the trocar;

[0026] Figure 6 It is a schematic diagram of the cannula being squeezed and loaded into the trocar;

[0027] Figure 7 It is a schematic diagram of the cannula being squeezed and loaded into the trocar;

[0028] Figure 8 It is a schematic diagram of the trocar being inserted into the surgical site;

[0029] Figure 9 It is a schematic diagram of the trocar being inserted into the surgical site;

[0030] Figure 10 It is a schematic diagram of the trocar being inserted into the surgical site;

[0031] Figure 11 It is a schematic diagram of the trocar being inserted into the surgical site;

[0032] Wherein: 1 is the tube body; 1-1 is the drainage cavity; 2 is the internal flange plate; 3-1 is the external flange plate; 3-2 is the cover; 4 is the silica gel nut; 5 is the sealing piece; 6 is the cutout; 7 is the plug; 8 is the handle; 9 is the body; 9-1 is the arc head; 10 is the cannula hole; 10-1 is the circular area; 10-2 is the square area; 10-3 is the arc area. DETAILED DESCRIPTION

[0033] The technical solution of this utility model will be further described below with reference to specific embodiments. These embodiments are only used to illustrate the technical solution of this utility model in more detail and should not be construed as limiting the scope of protection of this utility model.

[0034] The cannula used in the following embodiments can be any type of surgical cannula, and for details, please refer to the cannula provided in CN211093985U.

[0035] like Figure 3 and Figure 4 As shown ( Figure 4 (The cover 3-2 is in the disassembled state). The sleeve includes a tube 1 with an internal through channel. Both ends of the tube 1 have an inner flange 2 and an outer flange 3-1 formed along the radial outer edge of the tube 1, respectively. One end of the inner flange 2 is called the tail end, and one end of the outer flange 3-1 is called the head end.

[0036] like Figure 1 As shown, this utility model first provides a cannula puncture device, which includes a handle 8 and a plate-shaped body 9 fixedly connected to the handle 8. The end of the body 9 is an arc-shaped head 9-1, and a cannula hole 10 is opened at the end of the body 9. The cannula is detachably fixed in the cannula hole 10, as shown. Figure 2 As shown, the length of the major axis of the sleeve hole 10 along the extension direction of the body 9 is greater than the diameter of the sleeve body 1, but smaller than the diameter of the inner flange plate 2 of the sleeve in the undeformed state. The length of the minor axis of the sleeve hole 10 is slightly smaller than the diameter of the sleeve body 1.

[0037] When the cannula is inserted into the cannula hole 10, the body 9 of the trocar clamps the cannula because the short axis of the cannula hole 10 is slightly smaller than the diameter of the cannula body 1. Since the long axis of the cannula hole is greater than the diameter of the cannula body 1 and smaller than the diameter of the inner flange plate 2 at the end of the cannula in its undeformed state, the cannula will not slip out when inserted into the cannula hole 10. After the cannula is placed, the trocar can slide out and separate the cannula from the trocar.

[0038] Preferably, the cannula hole 10 includes a circular area 10-1 on one side of the handle 8, an arc-shaped area 10-3 on one side of the arc-shaped head 9-1, and a square area 10-2 between the arc-shaped area 10-3 and the circular area 10-1. The minor axis lengths of the junctions of the circular area 10-1 and the square area 10-2, as well as the junctions of the arc-shaped area 10-3 and the square area 10-2, are equal and tangent to the upper and lower sides of the square area 10-2. The cannula hole 10 with the above-mentioned shape facilitates the clamping and removal of the cannula and reduces the damage to the human body caused by the cannula puncture device.

[0039] The body 9 is provided with scale lines at a fixed interval from the end of the arc head 9-1. Before being inserted into the cannula, the cannula puncture device can be independently inserted into the surgical site. According to the reading of the scale lines on the body 9, the reading is used as a reference for selecting the length of the cannula. The suitable type of cannula can be selected. As a preferred embodiment, the fixed interval of the scale lines is 10 mm.

[0040] The external flange plate 3-1 is provided with a clamping groove, and the cover 3-2 is provided with a clamping convex corresponding to the clamping groove. The cover 3-2 is detachably fixedly connected with the external flange plate 3-1 through the cooperation of the clamping groove and the clamping convex. The cover 3-2 has elasticity and a through hole is formed in the center for the insertion of surgical instruments such as arthroscopy. The diameter of the through hole in the cover 3-2 in the undeformed state is smaller than the diameter of the internal passage of the tube body 1. After the medical instrument is inserted, the cover 3-2 can seal the sleeve at the top of the sleeve.

[0041] A sealing sheet 5 is fixedly arranged in the through passage in the tube body 1, and a cutout 6 is arranged in the center of the sealing sheet 5.

[0042] The tube body 1 is provided with external threads, and the silica gel nut 4 is arranged on the tube body 1 through corresponding internal threads.

[0043] A drainage channel 1-1 is arranged in the tube body 1 in the direction of the extension of the tube body 1, and the drainage channel 1-1 penetrates out of the internal flange plate 2. The drainage channel 1-1 is turned at the external flange plate 3-1 and penetrates out of the side of the external flange plate 3-1 to form a liquid outlet end. Through the drainage channel 1-1, the liquid such as irrigation fluid at the surgical site can be drained during the operation.

[0044] A plug 7 is arranged at the liquid outlet end of the drainage channel 1-1 at the external flange plate 3-1 and cooperates with the liquid outlet end. When drainage is not needed, the plug 7 can be inserted into the drainage channel 1-1 from the liquid outlet end. When drainage is needed, the plug 7 is removed. The sealing between the cannula and the cutout 6 is not affected, and the existing anti-overflow function of the cannula is not affected.

[0045] The way of loading the cannula into the cannula puncture device is shown in Figures 5 to 7 After the cannula puncture device is independently inserted into the surgical site and the appropriate cannula is selected, the internal flange plate 2 of the cannula is pinched and inserted into the cannula hole 10 from the cannula hole 10, and is fixed to the body 9. After the hand is released, the internal flange plate 2 at the tail end of the cannula gradually returns to its original state. Since the minor axis length of the cannula hole 10 is slightly smaller than the diameter of the tube body 1 of the cannula, the cannula is clamped by the cannula hole 10, so that the cannula is fixed to the cannula puncture device through the cannula hole 10.

[0046] The operation mode of placing the cannula at the surgical site by using the cannula puncture device is shown in Figures 8 to 11As shown, the handle 8 of the handheld cannula puncture device is used to insert the end of the cannula puncture device body 9 together with the cannula tail end into the surgical site to be placed, the depth of insertion is observed and adjusted to be appropriate through the scale on the device body 9, so that the inner flange plate 2 is tightly attached to the inner layer of the incision of the surgical site, at this time, the handle 8 is rotated and slightly forced downward, the cannula and the cannula puncture device can be separated, then the cannula puncture device is pulled out, the silicone nut 4 is rotated to slightly adjust the tightness of the cannula, and subsequent surgical operation can be performed.

[0047] The cannula is made of an elastic material, and specifically, silicon rubber or TPU can be selected.

[0048] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any equivalent replacement, modification, etc. made by those skilled in the art within the spirit and principle of the present application without any creative labor should be included in the protection scope of the present application.

Claims

1. A cannula puncture device, comprising a handle (8) and a plate-shaped body (9) fixedly connected to the handle, wherein the cannula being punctured comprises a tube (1) having an internal through-channel, and an inner flange plate (2) and an outer flange plate (3-1) are respectively formed at both ends of the tube (1) along the radial outer edge of the tube, characterized in that, The end of the body (9) is an arc-shaped head (9-1). A sleeve hole (10) is opened at the end of the body (9). The sleeve is detachably fixed in the sleeve hole (10). The length of the major axis of the sleeve hole (10) along the extension direction of the body (9) is greater than the diameter of the sleeve body (1), but smaller than the diameter of the inner flange plate (2) of the sleeve in the undeformed state. The length of the minor axis of the sleeve hole (10) is slightly smaller than the diameter of the sleeve body (1).

2. The cannula puncture device according to claim 1, characterized in that, The sleeve hole (10) includes a circular area (10-1) on the side of the handle (8), an arc-shaped area (10-3) on the side of the arc-shaped head (9-1), and a square area (10-2) between the arc-shaped area (10-3) and the circular area (10-1). The minor axis lengths of the junctions of the circular area (10-1) and the square area (10-2) and the junctions of the arc-shaped area (10-3) and the square area (10-2) are all equal.

3. The cannula puncture device according to claim 2, characterized in that, The body (9) has scale lines set at fixed intervals from the end of the arc-shaped head (9-1).

4. The cannula puncture device according to any one of claims 1-3, characterized in that, The outer flange plate (3-1) of the sleeve is provided with a slot, and the cover (3-2) is provided with a corresponding protrusion that cooperates with the slot. The center of the cover (3-2) is provided with a through hole for instruments to pass through. The cover (3-2) is detachably fixedly connected to the outer flange plate (3-1) through the cooperation of the slot and the protrusion.

5. The cannula puncture device according to claim 1, characterized in that, A sealing sheet (5) is fixedly installed in the through channel inside the tube (1), and a cut (6) is provided in the center of the sealing sheet.

6. The cannula puncture device according to claim 1, characterized in that, The tube body (1) is provided with external threads, and the silicone nut (4) is set on the tube body (1) through the corresponding mating internal threads.

7. The cannula puncture device according to claim 1, characterized in that, A drain channel (1-1) is provided inside the pipe body (1) along the direction of extension of the pipe body (1), and the drain channel (1-1) extends through the inner flange plate (2); the drain channel (1-1) turns at the outer flange plate (3-1) and extends out from the side of the outer flange plate (3-1) to form a liquid outlet end.

8. The cannula puncture device according to claim 7, characterized in that, A plug (7) that mates with the outlet end is provided on the outlet end of the external flange plate (3-1) of the drain channel (1-1).

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