CN212699220U - Safety ascites continuous collecting needle - Google Patents

Abstract

The utility model discloses a safe ascites continuous collecting needle, which comprises a needle head and a drainage hose communicated with the needle head; the tail end of the needle head is hermetically communicated with a holding pipe, the front end of the outer wall of the holding pipe is provided with a bowl-shaped intercepting groove with an opening facing to the front end of the needle head, the bottom of the bowl-shaped intercepting groove is provided with a liquid return port communicated with the inner cavity of the holding pipe, and the liquid return port is provided with a one-way liquid inlet valve; the rear end of the holding tube is hermetically communicated with a U-shaped extension tube, and the rear end of the U-shaped extension tube is communicated with a drainage hose. The utility model discloses the advantage is in simple structure, and is easy and simple to handle, and security and collection efficiency improve greatly, can effectual collection along the ascites that the syringe needle outer wall flows, avoid polluting laboratory bench and experimenter, can also effectual restriction injection length simultaneously, avoid the injection too dark, accord with animal welfare, do benefit to the smooth progress of ascites collection experiment, guarantee the whole pollution-free collection of ascites, effectively avoid the waste of ascites resource, realize the continuous collection of ascites.

Description

Safety ascites continuous collecting needle

Technical Field

The utility model relates to a biological experiment equipment especially relates to a safe type ascites continuous acquisition needle.

Background

In the biomedical industry, animal immunity experiments are indispensable, and particularly, in the process of preparing monoclonal antibodies by an in vivo method, ascites continuous collection experiment operation needs to be carried out on a plurality of living animal models (such as a Babl/c mouse).

In order to keep the yield of the collected ascites at a higher level, the needle needs to be inserted shallowly as much as possible in the collection process, so that the wound is prevented from being too deep, better healing and recovery of the wound are ensured, and more ascites can be continuously generated, thereby supplying collection; in addition, the ascites of the living animal in the experimental process needs to be prevented from flowing out along the outer side wall of the needle stalk to contaminate the fingers or other parts of the skin of the experimenter, and the ascites splashing phenomenon caused by overlarge abdominal pressure needs to be avoided.

At present, the safety of the common disposable collecting needle on the market is poor due to the overlong needle head, the phenomenon of too deep needle insertion often occurs, the welfare of animals is not met, and the smooth progress of ascites collecting experiments is not facilitated. In addition, in the ascites collecting process, the ascites is often splashed and scattered at the moment of needle insertion due to large difference between internal pressure and external pressure, so that the ascites cannot be completely collected in the container, resources are wasted, the ascites is easily splashed to the body of an experimenter, and higher pollution risk is brought to the experimenter; simultaneously, because current disposable collection needle is long and thin syringe needle, leads to gathering the in-process, ascites can flow along the syringe needle outer wall, can lead to ascites wasting of resources and the risk of polluting the experimenter equally.

Disclosure of Invention

The utility model aims to provide a safe ascites continuous collection needle with simple structure and simple operation.

In order to achieve the above purpose, the utility model can adopt the following technical proposal:

the safe ascites continuous collecting needle of the utility model comprises a needle head and a drainage hose communicated with the needle head; the tail end of the needle head is hermetically communicated with a holding pipe, the front end of the outer wall of the holding pipe is provided with a bowl-shaped intercepting groove with an opening facing to the front end of the needle head, the bottom of the bowl-shaped intercepting groove is provided with a liquid return port communicated with the inner cavity of the holding pipe, and the liquid return port is provided with a one-way liquid inlet valve; the rear end of the holding tube is hermetically communicated with a U-shaped extension tube, and the rear end of the U-shaped extension tube is communicated with the drainage hose.

The liquid return ports are uniformly arranged along the circumferential direction of the holding pipe at intervals.

The length of the holding pipe is 3-8 cm; the outer wall of the holding pipe is sleeved with an anti-slip rubber sleeve.

The opening edge of the bowl-shaped intercepting groove is a smooth arc surface, and the length of the needle head extending out of the opening of the bowl-shaped intercepting groove is 0.5-3 cm.

An anti-blocking through hole is arranged on the spine part at the front end of the needle head.

The utility model discloses the advantage is in simple structure, and is easy and simple to handle, and security and collection efficiency improve greatly. The holding tube arranged at the rear end of the needle head is convenient for handheld operation, and the U-shaped extension tube hermetically communicated with the rear end of the holding tube can effectively prevent ascites from splashing at the moment of needle insertion; the bowl-shaped intercepting groove arranged at the front end of the outer wall of the holding pipe can effectively collect ascites flowing out along the outer wall of the needle head, so that a laboratory bench and laboratory personnel are prevented from being polluted; meanwhile, the bowl-shaped intercepting groove can effectively limit the length of the inserted needle, avoid the too deep insertion, accord with the welfare of animals and facilitate the smooth progress of ascites collection experiments; the liquid return port arranged on the side wall of the needle head can enable ascites to flow back to the connecting hose again to be collected, so that the ascites can be collected in a pollution-free manner, the waste of ascites resources is effectively avoided, and the ascites can be collected continuously.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

As shown in figure 1, the safe ascites continuous collecting needle of the utility model comprises a needle head 1 and a drainage hose 2 communicated with the needle head 1; the sealed intercommunication in the end of syringe needle 1 has the pipe 3 of gripping, for further making things convenient for operating personnel to hold, the length of gripping pipe 3 keeps being 3~8cm as far as possible to still can be in the suit antiskid rubber sleeve 7 on the outer wall of the pipe 3 of gripping, antiskid rubber sleeve 7 can increase the diameter at this position, can increase the frictional force with the hand simultaneously again, and the reinforcing is grabbed and is held power.

In order to effectively collect ascites flowing out of the outer wall of the needle head 1, the front end of the outer wall of the holding tube 3 is provided with a bowl-shaped intercepting groove 4 with an opening facing to the front end of the needle head 1, and the bottom of the bowl-shaped intercepting groove 4 is provided with a liquid return port 5 communicated with the inner cavity of the holding tube 3, so that the ascites collected by the bowl-shaped intercepting groove 4 flows back into the holding tube 3 again, the ascites can be collected completely without pollution, and the waste of ascites resources is effectively avoided; the liquid return port 5 is provided with a one-way liquid inlet valve, ascites in the holding pipe 3 is prevented from flowing out of the liquid return port 5, and in addition, the liquid return port 5 is uniformly arranged along the circumferential direction of the holding pipe 3 at intervals, so that the backflow of the ascites is accelerated.

In order to effectively avoid splashing of ascites in the moment of needle insertion, the rear end of the holding tube 3 is hermetically communicated with a U-shaped extension tube 6, the U-shaped extension tube 6 is made of transparent materials such as PE and PVC and has certain flexibility, and the rear end of the U-shaped extension tube 6 is communicated with the drainage hose 2.

In addition, in order to avoid scratching animals and experimenters, the opening edge of the bowl-shaped intercepting groove 4 needs to be polished so as to form a smooth arc surface, and meanwhile, the length of the needle head 1 extending out of the opening of the bowl-shaped intercepting groove 4 is kept to be 0.5-3 cm, so that the needle insertion depth of the needle head 1 is restrained, and the needle is prevented from puncturing other organs such as internal organs of the animals too deeply; and because the needle head 1 is of a single-channel type, in order to prevent the internal channel of the needle head 1 from being blocked and ensure that the liquid in the abdominal cavity flows out completely, the spine part at the front end of the needle head 1 is provided with an anti-blocking through hole 8.

When the collecting device is used, the collecting needle with the proper extending length of the needle head 1 is selected according to the body size of a living animal, then the thumb and the forefinger (or both the middle finger and the multiple fingers) are used for holding the antiskid rubber sleeve 7 on the outer side of the holding tube 3, then the collection is carried out according to the method for collecting the ascites of the living animal (the ascites mainly flows out of the abdominal cavity naturally according to the abdominal cavity pressure principle), the other end of the drainage hose 2 is connected with a collecting container (generally a 15 or 50ml centrifugal tube), and the ascites is stored in the collecting container, so that the collection of the ascites is completed; after the ascites is collected, the collecting needle can be soaked and disinfected by using 75% alcohol, and then cleaned by using purified water and dried, so that the needle is convenient to use next time.

Claims (6)

1. A safe ascites continuous collecting needle comprises a needle head (1) and a drainage hose (2) communicated with the needle head (1); the method is characterized in that: the tail end of the needle head (1) is hermetically communicated with a holding tube (3), the front end of the outer wall of the holding tube (3) is provided with a bowl-shaped intercepting groove (4) with an opening facing the front end of the needle head (1), the bottom of the bowl-shaped intercepting groove (4) is provided with a liquid return port (5) communicated with the inner cavity of the holding tube (3), and the liquid return port (5) is provided with a one-way liquid inlet valve; the rear end of the holding tube (3) is hermetically communicated with a U-shaped extension tube (6), and the rear end of the U-shaped extension tube (6) is communicated with the drainage hose (2).

2. The safety ascites continuous collection needle according to claim 1, characterized in that: the liquid return ports (5) are uniformly arranged along the circumferential direction of the holding pipe (3) at intervals.

3. The safety ascites continuous collection needle according to claim 1, characterized in that: the length of the holding pipe (3) is 3-8 cm.

4. The safety ascites continuous collection needle according to claim 1 or 3, characterized in that: the outer wall of the holding pipe (3) is sleeved with an anti-skid rubber sleeve (7).

5. The safety ascites continuous collection needle according to claim 1, characterized in that: the opening edge of the bowl-shaped intercepting groove (4) is a smooth arc surface, and the length of the needle head (1) extending out of the opening of the bowl-shaped intercepting groove (4) is 0.5-3 cm.

6. The safety ascites continuous collection needle according to claim 1, characterized in that: an anti-blocking through hole (8) is arranged on the front end spike part of the needle head (1).

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