CN212213845U

CN212213845U - Ommaya bag drainage puncture needle fixing device

Info

Publication number: CN212213845U
Application number: CN202020311826.0U
Authority: CN
Inventors: 徐航哲; 孙竞; 俞晓波; 吴清华; 李建儒; 陈高
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2020-12-25
Anticipated expiration: 2030-03-13

Abstract

The utility model discloses an Ommaya bag drainage pjncture needle fixing device belongs to medical instrument technical field. The device consists of a base, a fixed cover, a fixer and a hinge; the fixer sets up in the top of base, and fixed lid passes through hinged joint with the fixer. The utility model discloses a device has under the condition that does not bring extra damage to the patient, fixes Ommaya bag pjncture needle better, the characteristics of adjustable pjncture needle depth simultaneously.

Description

Ommaya bag drainage puncture needle fixing device

Technical Field

The utility model relates to the technical field of medical equipment, specifically relate to an Ommaya bag drainage pjncture needle fixing device.

Background

Ommaya's capsule is a common intracranial implant for neurosurgery, and is composed of a silica gel liquid storage bag which is embedded under the scalp and has a flat bottom end, and a silica gel tube, wherein one end of the silica gel liquid storage bag is connected with the liquid storage bag, and the other end of the silica gel tube is arranged in a ventricle or a focus. When in use, the needle head or the intravenous infusion needle can be connected with an injector, and the scalp is punctured into the liquid storage bag to extract cerebrospinal fluid or conduct continuous drainage, and the medicine can also be injected into the cranium through the liquid storage bag. Because of the special material of the liquid storage bag, the liquid storage bag can bear the needle head to puncture for many times without leakage. Clinically, the intravenous infusion needle is usually bent into an angle of 90-120 degrees manually, is punctured into the liquid storage bag and is connected with a drainage bag to continuously drain cerebrospinal fluid. When the needle is fixed, a sterile absorbent cotton ball is usually padded under the needle and fixed by using a medical adhesive tape, a transparent film patch or a medical application patch. Some units are fixed by sewing.

The fixing methods all have the problem of unstable fixation, and the needle head is easy to separate from the cyst cavity and even from the scalp due to the change of the head position of a patient and the traction caused by operations of extracting cerebrospinal fluid by a doctor and the like, so that the angle adjustment or repeated puncture is required, the tissue injury and infection risks are increased, and the service life of the Ommaya sac is shortened. Suture fixation causes additional trauma to the patient and may also damage the Ommaya sac and silicone tubing.

In addition, because patients have individual difference, the thicknesses of scalps at different parts are different, and the bending part of the puncture needle is also mainly judged by an operator, the distance between the bending part of the puncture needle and the scalps is different after the puncture needle is successfully punctured into the liquid storage bag, and the fixing of the puncture needle is difficult. In addition, it is sometimes clinically possible to have too deep or too shallow a puncture, resulting in an obstructed drainage and requiring adjustment of the depth of the puncture needle.

Disclosure of Invention

To the problem that prior art exists, the utility model provides an Ommaya bag drainage pjncture needle fixing device can be under the condition that does not bring extra wound for the patient, effectively fixes the pjncture needle of the different degree of depth, can adjust the degree of depth of pjncture needle simultaneously at any time.

The utility model aims at realizing through the following technical scheme: an Ommaya sac drainage puncture needle fixing device comprises a base, a fixing cover, a fixer and a hinge; the fixer is arranged above the base, and the fixing cover is connected with the fixer through a hinge; the base is formed by sequentially connecting a soft annular dressing, a hard flat ring structure and a hard annular structure from outside to inside, and a layer of dustproof film is bonded below the soft dressing; the fixer is hollow and cylindrical and is connected with the hard flat ring structure through the hard annular structure, a groove which is parallel to the axial direction of the fixer is arranged on the side of the fixer, one side of the groove is a smooth wall surface, and the other side of the groove is a sawtooth wall surface; the fixed cover comprises a circular hard cover body, a cuboid fixed column and a small bulge, the circular hard cover body is hinged to the fixing device, the hinge is arranged on the opposite side of the groove, the cuboid fixed column is arranged below the circular hard cover body and is in riveted connection with the groove, and the small bulge is arranged on the side face of the circular hard cover body.

Further, the wall thickness of the fixator is 2-3 mm.

Furthermore, the size of the sawteeth on the sawtooth-shaped wall surface is equal to the thickness of the puncture needle head.

Further, the width of cuboid fixed column equals with the width of recess, cuboid fixed column thickness equals with the wall thickness of fixer, the length of cuboid fixed column equals with the height of recess. Compared with the prior art, the utility model discloses following beneficial effect has:

1. the shape of the lower part of the base of the device is matched with the radian of the head of a human body, so that the whole device can be better fixed on the scalp;

2. the sawtooth structure adopted by the device can well fix the puncture needle and adjust the puncture depth;

3. the design of the fixed cover of the device can provide a relatively closed sterile environment at the puncture part, and reduces the risk of intracranial infection of a patient.

Drawings

Fig. 1 is a schematic structural view of the Ommaya sac drainage puncture needle fixing device of the utility model;

fig. 2 is a top view of the Ommaya sac drainage puncture needle fixing device of the utility model.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings, so that the objects and technical effects of the present invention will be more apparent.

Referring to fig. 1 and 2, the Ommaya sac drainage puncture needle fixing device of the utility model consists of a base 1, a fixing cover 2, a fixer 3 and a hinge 4; the fixer 2 is arranged above the base 1, and the fixing cover 3 is connected with the fixer 2 through a hinge 4; the base 1 comprises a plurality of ring structures, and is formed by connecting soft annular dressing 13, hard flat ring structure 12 and hard ring structure 11 from outside to inside in proper order, a layer of dust-proof membrane is bonded below the soft dressing 13, and the soft dressing 13 makes the shape of the lower part of the base 1 fit with the radian of the head of a human body. The fixer 3 is hollow cylindrical, has a wall thickness of 2-3mm, and is connected with the hard flat ring structure 12 through the hard annular structure 11, so that the fixer 3 is supported, and the fixer 3 is prevented from being separated from the scalp due to factors such as head rotation friction. The side of the fixer 3 is provided with a groove 32 which is parallel to the axial direction of the fixer 3, one side of the groove is a smooth wall surface 33, and the other side of the groove is a sawtooth-shaped wall surface 34 for placing the puncture needle head 51 and the cuboid fixed column 21. The groove 32 can be used for placing the bent puncture needle head 51, the size of the sawteeth wall surface 34 is equal to the thickness of the puncture needle head 51, and the puncture needle head 51 can be embedded into the sawteeth when being placed, so that the fixing purpose is achieved. Fixed lid 2 includes circular stereoplasm lid 22, cuboid fixed column 21 and little arch 23, circular stereoplasm lid 22 is articulated with fixer 3, and hinge 4 sets up in recess 32's offside, cuboid fixed column 21 sets up in circular stereoplasm lid 22's below, the width of cuboid fixed column 21 equals with recess 32's width, cuboid fixed column 21 thickness equals with fixer 3's wall thickness, cuboid fixed column 21's length equals with recess 32's height, when can making cuboid fixed column 21 put into recess 32, whole device forms a relatively confined environment. The cuboid fixing column 21 can be riveted with the groove 32, and the small bulge 23 is arranged on the side face of the circular hard cover body 22. The male head of the hinge 4 is positioned at one side below the fixed cover 2 and consists of a semi-cylinder 41 and rod-shaped bulges 42 at two side surfaces of the semi-cylinder 41; the female end of the hinge 4 is located on the upper side of the fixer 3 and is composed of a gap 43 matched with the shape of the male semi-cylinder 41 and two round holes 44 slightly larger than the male rod-shaped bulge 42. The width of the male half cylinder 41 plus the length of the protrusion 42 on one side should be slightly smaller than the width of the female notch 43.

The puncture needle adopted in the utility model is an intravenous infusion needle 5, which comprises a puncture needle head 51, a handle 52 and a hollow plastic hose 53.

The utility model discloses an Ommaya bag drainage pjncture needle fixing device's use does: the puncture needle is fixed by the fixing post 21 and the saw teeth 34 at one side of the side groove 32 of the fixer 3. In use, the patient is assured that the scalp hair above and around the Ommaya sac has been shaved and sufficiently disinfected. The rod-shaped protrusion 42 at one side of the male end of the hinge 4 is inserted into the round hole 44 at the female end at the same side, and the rod-shaped protrusion 42 at the other side is inserted into the round hole 44 at the other side of the female end. The movement of the fixing cap 2 above the holder 3 and whether the width of the gap between the rectangular parallelepiped fixing post 21 and the saw tooth 34 can securely fix the puncture needle are checked. The fixing cover 2 is opened by the small bulge 23 at the side of the fixing cover, the base 1 and the fixer 3 are covered on the scalp above the Ommaya sac, the body surface projection of the Ommaya sac is positioned below the fixer 3, and the body surface projection of the Ommaya sac and the scalp puncture point are not required to be kept in the middle of the central opening of the base 1. The holder 3 is axially rotated so that the serrations 34 in the side grooves 32 are in the direction in which the needle is to be extended, and the entire device is fixed. And (3) bending the puncture needle head to form an angle, then taking down the protective sleeve of the needle head, and checking the smoothness of the bent puncture needle head by using an injector. The puncture needle head is placed from the lateral groove 32 of the fixator, and the needle tip is inserted into the scalp until reaching the Ommaya sac. After syringe aspiration confirms that the needle is properly inserted, the orientation of the needle 51 and the position of the entire fixture are adjusted slightly so that the needle tip can be inserted parallel to one of the serrations 34. The dust-proof film of the base is carefully removed and the holder 3 is stuck to the scalp. The fixing cover 2 is turned over so that the fixing posts 22 enter the grooves 32 and fix the tail of the puncture needle with the saw teeth 34 at the side of the grooves. The patency of the puncture needle was confirmed again using the syringe.

When in use, a sterile cotton ball or sterile gauze with proper size can be taken and placed above the puncture needle in the fixer 3, and then the fixing cover 2 is covered, so that the function of keeping the sterile environment around the puncture point is achieved.

The entire fixation device may be further secured after the above steps are completed using medical tape, medical dressing, or elastic bandage.

Claims

1. The Ommaya sac drainage puncture needle fixing device is characterized by comprising a base (1), a fixing cover (2), a fixer (3) and a hinge (4); the fixer (3) is arranged above the base (1), and the fixing cover (2) is connected with the fixer (3) through a hinge (4); the base (1) is formed by sequentially connecting a soft annular dressing (13), a hard flat ring structure (12) and a hard annular structure (11) from outside to inside, and a layer of dustproof film is bonded below the soft annular dressing (13); the fixer (3) is hollow and cylindrical and is connected with the hard flat ring structure (12) through the hard annular structure (11), a groove (32) which is parallel to the fixer (3) in the axial direction is arranged on the side of the fixer (3), one side of the groove is a smooth wall surface (33), and the other side of the groove is a sawtooth wall surface (34); fixed lid (2) include circular stereoplasm lid (22), cuboid fixed column (21) and little arch (23), circular stereoplasm lid (22) are articulated with fixer (3), and hinge (4) set up in the offside of recess (32), cuboid fixed column (21) set up in the below of circular stereoplasm lid (22), are connected with recess (32) riveting, little arch (23) set up in the side of circular stereoplasm lid (22).

2. Ommaya balloon drainage needle fixture according to claim 1, wherein the wall thickness of the holder (3) is 2-3 mm.

3. The Ommaya pouch drainage puncture needle fixture according to claim 1, wherein the size of the serrations of the serrated wall surface (34) is equal to the thickness of the puncture needle tip.

4. The Ommaya balloon drainage puncture needle fixing device according to claim 1, wherein the width of the rectangular parallelepiped fixing post (21) is equal to the width of the groove (32), the thickness of the rectangular parallelepiped fixing post (21) is equal to the wall thickness of the holder (3), and the length of the rectangular parallelepiped fixing post (21) is equal to the height of the groove (32).