CN211740740U

CN211740740U - Extraction device for cerebrospinal fluid for forensic medicine

Info

Publication number: CN211740740U
Application number: CN202020367782.3U
Authority: CN
Inventors: 刘长海; 张曙光; 阿民勿日他; 贾富全; 霍志鑫
Original assignee: Inner Mongolia Medical University
Current assignee: Inner Mongolia Medical University
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2020-10-23
Anticipated expiration: 2030-03-20

Abstract

The utility model discloses a forensic cerebrospinal fluid extraction element, including drawing a section of thick bamboo, it has the piston to draw an interior sliding connection, the side fixedly connected with piston rod of piston, draw an one end fixedly connected with connecting pipe that a section of thick bamboo is close to the piston, the connecting pipe link up each other with drawing a section of thick bamboo, the inner wall fixedly connected with feed liquor check valve that is close to piston one end on the connecting pipe, the one end joint that the piston was kept away from to the connecting pipe has the trocar of usefulness of puncture, draw the side fixedly connected with connecting cylinder that is close to its left end on the section of thick bamboo, the liquid mouth has been seted up at the top of connecting cylinder, the bottom fixedly connected with of connecting cylinder inner wall is used for the sealed seal. The utility model discloses an above-mentioned isotructure's cooperation has realized that the cerebrospinal fluid is in the extraction completion back, and in the cerebrospinal fluid of extraction put into the stock solution bottle that can be timely, and easy operation is convenient, provides convenience for the extraction and place.

Description

Extraction device for cerebrospinal fluid for forensic medicine

Technical Field

The utility model relates to a cerebrospinal fluid extraction technical field specifically is cerebrospinal fluid extraction element for the forensic medicine.

Background

The brain and cerebrospinal fluid are coated by dura mater, arachnoid membrane and pia mater, and a cavity is arranged between arachnoid membrane and pia mater to connect brain and cerebrospinal fluid, called subarachnoid cavity, which contains cerebrospinal fluid, and the cerebrospinal fluid can be successfully extracted by the puncture needle when puncturing. The purpose mainly used that the forensic medicine draws cerebrospinal fluid draws extraction, save and detect of cerebrospinal fluid, owing to draw the back save time longer and draw the back and have certain distance to detecting the laboratory, require to draw behind the cerebrospinal fluid that draws to examine before detecting the material must be in the enclosed state, the utility model relates to a forensic medicine uses cerebrospinal fluid extraction element, not only can draw operation process and make the cerebrospinal fluid be in the enclosed state, draws the back stock solution bottle that finishes moreover and can take off alone and airtight save and transport, can not cause the loss of giving off of volatile poison.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a forensic doctor is with cerebrospinal fluid extraction element, possess the extraction of accomplishing the cerebrospinal fluid under totally enclosed state, can be airtight in the stock solution bottle to the cerebrospinal fluid, avoided the cerebrospinal fluid to reach long-time long-distance transport and store and cause the noxious material to volatilize, conveniently carry simultaneously for the extraction and the storage of cerebrospinal fluid are comparatively simple and convenient, have guaranteed the accuracy of testing result, have improved work efficiency's advantage, have solved the problem of proposing among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: forensic medicine is with cerebrospinal fluid extraction element, including drawing a section of thick bamboo, it has the piston to draw an internal sliding connection, the side fixedly connected with piston rod of piston, draw an one end fixedly connected with connecting pipe that a section of thick bamboo is close to the piston, the connecting pipe link up each other with drawing a section of thick bamboo, the inner wall fixedly connected with feed liquor check valve that is close to piston one end on the connecting pipe, the one end joint that the piston was kept away from to the connecting pipe has the trocar of usefulness of puncture.

Draw the side fixedly connected with connecting cylinder that is close to its left end on the section of thick bamboo, the liquid mouth has been seted up at the top of connecting cylinder, the bottom fixedly connected with of connecting cylinder inner wall is used for the sealed seal assembly who crosses the liquid mouth, the liquid outlet has been seted up to the side that is close to its bottom on the connecting cylinder, the inner wall fixedly connected with of liquid outlet falls L type liquid needle tubing, the lower surface of drawing the section of thick bamboo rotates through the bearing and is connected with the screw rod, the surperficial threaded connection of screw rod has the removal cover, draw a lower fixed surface of section of thick bamboo and be used for restricting the spacing subassembly that removes the cover pivoted, the side fixedly connected with of removal cover places the board, the liquid bottle has been placed to the upper surface of placing the board, the open-top of liquid bottle is equipped with the sealing member, the.

Preferably, the sealing assembly comprises a spring, the spring is fixedly connected to the bottom of the inner wall of the connecting cylinder, and the top end of the spring is fixedly connected with a plugging plug used for sealing the liquid passing port.

Preferably, the surface of the sealing plug is fixedly connected with a sealing layer, and the surface of the sealing layer is abutted against the inner wall of the liquid passing port.

Preferably, the limiting assembly comprises a limiting rod, the limiting rod is fixedly connected to the lower surface of the extraction barrel, and the bottom end of the limiting rod penetrates through the movable sleeve and is fixedly connected with the limiting plate.

Preferably, the sealing member is a rubber sealing plug, the rubber sealing plug is clamped at the opening of the liquid storage bottle, and the bottom end of the inverted L-shaped liquid outlet needle tube penetrates through the rubber sealing plug and extends into the liquid storage bottle.

Preferably, the movable sleeve and the placing plate are of an integrally formed structure, and the upper surface of the placing plate is provided with a placing groove for placing the liquid storage bottle.

Compared with the prior art, the beneficial effects of the utility model are that: through the matching of the piston, the piston rod, the connecting pipe and the trocar, the cerebrospinal fluid is convenient to extract, and through the matching of the one-way valve, the connecting cylinder, the sealing component, the liquid storage bottle, the rubber sealing plug, the screw rod, the moving sleeve, the limiting rod and the placing plate, the cerebrospinal fluid can be always in a closed state, and after sampling is finished, the cerebrospinal fluid in the extracting cylinder can be timely placed into the liquid storage bottle to be closed, so that the safety of the cerebrospinal fluid in the processes of extraction, transportation and storage is ensured, and the working efficiency is improved; need when taking off the stock solution bottle, rotate the screw rod for the movable plate can the downstream, thereby drive the stock solution bottle downstream, take off the stock solution bottle afterwards can, rubber seals stopper itself and has elasticity, makes when falling L type play liquid needle tubing and breaking away from rubber and seal the stopper, and the rubber tuyere stopper can seal the stock solution bottle all the time, to sum up, use through the cooperation of above-mentioned relevant structure for cerebrospinal fluid is after the extraction is accomplished, can put into the stock solution bottle safely to cerebrospinal fluid, and easy operation is convenient, provides convenience for the extraction and places.

Drawings

Fig. 1 is a front view of the present invention;

fig. 2 is a front cross-sectional view of the present invention;

fig. 3 is an enlarged view of the structure of the present invention at a.

In the figure: 1-extraction cylinder, 2-piston, 3-piston rod, 4-connecting pipe, 5-liquid inlet one-way valve, 6-trocar, 7-connecting cylinder, 8-inverted L-shaped liquid outlet needle tube, 9-screw, 10-moving sleeve, 11-placing plate, 12-liquid storage bottle, 13-spring, 14-sealing plug, 15-sealing layer, 16-limiting rod and 17-rubber sealing plug.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 3, the present invention provides a technical solution: a cerebrospinal fluid extraction device for forensic medicine comprises an extraction barrel 1, a piston 2 is slidably connected in the extraction barrel 1, a piston rod 3 is fixedly connected to the side surface of the piston 2, a connecting pipe 4 is fixedly connected to one end, close to the piston 2, of the extraction barrel 1, the connecting pipe 4 is communicated with the extraction barrel 1, a liquid inlet one-way valve 5 is fixedly connected to the inner wall, close to one end of the piston 2, of the connecting pipe 4, a trocar 6 for puncture is clamped at one end, far away from the piston 2, of the connecting pipe 4, a trocar 6 is inserted into the subarachnoid space, then the piston rod 3 is pulled to drive the piston 2 to move, so that the pressure intensity in, under the effect of external atmospheric pressure, can make the cerebrospinal fluid enter into extraction section of thick bamboo 1, and can know by the characteristic of feed liquor check valve 5 itself, feed liquor check valve 5 makes the cerebrospinal fluid can enter into extraction section of thick bamboo 1 from connecting pipe 4 in, and can not flow out from connecting pipe 4.

Draw and be close to the side fixedly connected with connecting cylinder 7 of its left end on the section of thick bamboo 1, the liquid mouth has been seted up at the top of connecting cylinder 7, and the bottom fixedly connected with of the inner wall of connecting cylinder 7 is used for the sealed seal assembly who crosses the liquid mouth.

Further, seal assembly includes spring 13, spring 13 fixed connection is on the bottom of connecting cylinder 7 inner wall, spring 13's top fixedly connected with is used for the shutoff stopper 14 of sealed liquid mouth, press down piston rod 3 and promote piston 2 and move left, can overcome spring 13's elasticity under the effect of cerebrospinal fluid pressure and promote shutoff stopper 14 downstream, make shutoff stopper 14 break away from liquid mouth, make liquid mouth open, draw the cerebrospinal fluid in the section of thick bamboo 1 and flow into stock solution bottle 12 through falling L type play liquid needle tubing 8, thereby can carry out temporary storage to the cerebrospinal fluid.

Further, a sealing layer 15 is fixedly connected to the surface of the plug 14, the surface of the sealing layer 15 abuts against the inner wall of the liquid passing port, and the sealing performance of the plug 14 and the liquid passing port is improved by the sealing layer 15.

The side that is close to its bottom on the connecting cylinder 7 has seted up the liquid outlet, and the inner wall fixedly connected with of liquid outlet falls L type liquid needle tubing 8, and the lower surface of drawing a section of thick bamboo 1 rotates through the bearing and is connected with screw rod 9, and the surperficial threaded connection of screw rod 9 has removal cover 10, draws a section of thick bamboo 1 lower surface fixedly connected with to be used for restricting to remove the spacing subassembly of cover 10 pivoted.

Further, spacing subassembly includes gag lever post 16, and gag lever post 16 fixed connection is on extracting a 1's lower surface, and the bottom of gag lever post 16 runs through and removes cover 10 to fixedly connected with limiting plate, gag lever post 16 have restricted the rotation that removes cover 10, make and remove cover 10 and can remove on the surface of screw rod 9.

A placing plate 11 is fixedly connected to the side of the moving sleeve 10.

Further, the movable sleeve 10 and the placing plate 11 are of an integrally formed structure, a placing groove for placing the liquid storage bottle 12 is formed in the upper surface of the placing plate 11, and the structural strength of the movable sleeve 10 and the placing plate 11 is enhanced through the integrally formed structure.

A liquid storage bottle 12 is arranged on the upper surface of the placing plate 11, a sealing element is arranged at the opening of the top of the liquid storage bottle 12, and the bottom end of the inverted L-shaped liquid outlet needle tube 8 penetrates through the sealing element and extends into the liquid storage bottle 12.

Furthermore, the sealing element is a rubber sealing plug 17, the rubber sealing plug 17 is clamped at the opening of the liquid storage bottle 12, the bottom end of the inverted-L-shaped liquid outlet needle tube 8 penetrates through the rubber sealing plug 17 and extends into the liquid storage bottle 12, when the liquid storage bottle 12 needs to be taken down, the screw rod 9 is rotated, the placing plate 11 can move downwards, the liquid storage bottle 12 is driven to move downwards, and then the liquid storage bottle 12 is taken down, the rubber sealing plug 17 has elasticity, so that when the inverted-L-shaped liquid outlet needle tube 8 is separated from the rubber sealing plug 17, the rubber sealing plug 17 can always seal the liquid storage bottle 12, in sum, through the matching of the related structures, cerebrospinal fluid can be safely placed into the liquid storage bottle 12 after extraction is completed, the operation is simple and convenient, convenience is provided for extraction and placement, in sum, through the matching of the related structures, after extraction is completed, the cerebrospinal fluid that can be timely put into stock solution bottle 12 to the extraction in, and draw the operation process and make the cerebrospinal fluid be in the encapsulated situation, draw back stock solution bottle 12 after finishing moreover and can take off alone and airtight save and transport, can not cause the loss of volatile poison emission.

The working principle is as follows: when the cerebrospinal fluid extraction device for forensic medicine is used and cerebrospinal fluid needs to be extracted, the trocar 6 is inserted into the subarachnoid space, then the piston rod 3 is pulled to drive the piston 2 to move, so that the pressure in the extraction barrel 1 is reduced, under the action of external atmospheric pressure, cerebrospinal fluid can enter the extraction barrel 1, and the characteristics of the liquid inlet one-way valve 5 can know, the liquid inlet one-way valve 5 enables cerebrospinal fluid to enter the extraction barrel 1 from the connecting pipe 4 and not flow out from the connecting pipe 4, after extraction is finished, a proper liquid storage bottle 12 is selected to be placed on the placing plate 11, the screw 9 is rotated, as the screw 9 is in threaded connection with the moving sleeve 10, and the limiting rod 16 limits the rotation of the moving sleeve 10, so that the moving sleeve 10 can move on the surface of the screw 9, thereby driving the placing plate 11 to move upwards, and enabling the inverted-L-shaped liquid outlet needle tube 8 to be inserted into the liquid storage bottle 12, then, the piston rod 3 is pressed downwards to push the piston 2 to move leftwards, the sealing plug 14 is pushed to move downwards under the action of cerebrospinal fluid pressure to overcome the elastic force of the spring 13, so that the sealing plug 14 is separated from the fluid passing port, the fluid passing port is opened, cerebrospinal fluid in the extraction cylinder 1 flows into the fluid storage bottle 12 through the inverted-L-shaped fluid outlet needle tube 8, so that the cerebrospinal fluid can be temporarily stored, when the fluid storage bottle 12 needs to be taken down, the screw rod 9 is rotated, the placing plate 11 can move downwards to drive the fluid storage bottle 12 to move downwards, then the fluid storage bottle 12 can be taken down, the rubber sealing plug 17 has elasticity, so that when the inverted-L-shaped fluid outlet needle tube 8 is separated from the rubber sealing plug 17, the rubber sealing plug 17 can always seal the fluid storage bottle 12, and in conclusion, through the matching use of the related structures, the cerebrospinal fluid can be safely placed into the fluid storage bottle 12 after being extracted, and easy operation is convenient, provides convenience for extraction and placement, to sum up, use through the cooperation of above-mentioned relevant structure for cerebrospinal fluid is in the stock solution bottle 12 is put into to the cerebrospinal fluid of extraction that can be timely after the extraction is accomplished, and draws operation process and make the cerebrospinal fluid be in the encapsulated situation, draws back stock solution bottle 12 that finishes moreover and can take off alone and airtight save and transport, can not cause the loss of volatile poison emission.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Forensic medical cerebrospinal fluid extraction element, including drawing a section of thick bamboo (1), the inner wall sliding connection who draws a section of thick bamboo (1) has piston (2), the side fixedly connected with piston rod (3) of piston (2), its characterized in that: a connecting pipe (4) is fixedly connected to one end, close to the piston (2), of the extraction cylinder (1), the connecting pipe (4) is communicated with the extraction cylinder (1), a liquid inlet one-way valve (5) is fixedly connected to the inner wall, close to one end of the piston (2), of the connecting pipe (4), and a trocar (6) for puncture is clamped to one end, far away from the piston (2), of the connecting pipe (4);

the lower surface of the extracting cylinder (1) close to the left end of the extracting cylinder is fixedly connected with a connecting cylinder (7), the top of the connecting cylinder (7) is provided with a liquid passing port, the bottom of the inner wall of the connecting cylinder (7) is fixedly connected with a sealing assembly used for sealing the liquid passing port, the side surface of the connecting cylinder (7) close to the bottom of the connecting cylinder is provided with a liquid outlet, the inner wall of the liquid outlet is fixedly connected with an inverted L-shaped liquid outlet needle tube (8), the lower surface of the extracting cylinder (1) is rotatably connected with a screw rod (9) through a bearing, the surface of the screw rod (9) is in threaded connection with a movable sleeve (10), the lower surface of the extracting cylinder (1) is fixedly connected with a limiting assembly used for limiting the rotation of the movable sleeve (10), the side surface of the movable sleeve (10) is fixedly connected with a placing plate (11), a liquid storage bottle (12) is placed on the upper surface, the bottom end of the inverted L-shaped liquid outlet needle tube (8) penetrates through the sealing piece and extends into the liquid storage bottle (12).

2. The forensic cerebrospinal fluid extraction device as claimed in claim 1, wherein: the sealing assembly comprises a spring (13), the spring (13) is fixedly connected to the bottom of the inner wall of the connecting cylinder (7), and the top end of the spring (13) is fixedly connected with a plugging plug (14) used for sealing the liquid passing port.

3. The forensic cerebrospinal fluid extraction device as claimed in claim 2, wherein: and a sealing layer (15) is fixedly connected to the surface of the sealing plug (14), and the surface of the sealing layer (15) is abutted against the inner wall of the liquid passing port.

4. The forensic cerebrospinal fluid extraction device as claimed in claim 1, wherein: the limiting assembly comprises a limiting rod (16), the limiting rod (16) is fixedly connected to the lower surface of the extraction barrel (1), and the bottom end of the limiting rod (16) penetrates through the movable sleeve (10) and is fixedly connected with a limiting plate.

5. The forensic cerebrospinal fluid extraction device as claimed in claim 1, wherein: the sealing member is rubber sealing plug (17), rubber sealing plug (17) joint is at the opening part of stock solution bottle (12), the bottom of falling L type play liquid needle tubing (8) runs through rubber sealing plug (17) and stretches into in stock solution bottle (12).

6. The forensic cerebrospinal fluid extraction device as claimed in claim 1, wherein: the movable sleeve (10) and the placing plate (11) are of an integrated structure, and a placing groove for placing the liquid storage bottle (12) is formed in the upper surface of the placing plate (11).