Blood cannula assembly for sheep

Abstract

The invention discloses a sheep blood cannula assembly which comprises a guide-in cylinder capable of puncturing a blood vessel wall, and the guide-in cylinder is provided with a cylinder body capable of allowing a catheter to penetrate through; the tail end of the catheter is connected with a connector, and a needle head communicated with the catheter is embedded in the connector; the other end of the connector is communicated with the three-way joint, and external substances are introduced into the catheter through the needle head by virtue of the three-way joint; a spring supporting guide wire is arranged in the catheter in the length direction in a penetrating mode and used for supporting the catheter. And an in-vivo fixer for fixing the catheter on tissues near a blood vessel is arranged outside the catheter. According to the invention, a series of matched components such as the leading-in cylinder, the catheter, the in-vivo fixator, the connector and the three-way joint are arranged, so that the problem that a proper connecting device and a proper fixing device are difficult to find due to the replacement of medical materials for people in an existing test is solved, and the components are matched and matched, so that the experiment difficulty and cost are reduced.

Description

technical field [0001] The invention relates to the technical field of livestock medical treatment, in particular to a blood cannula assembly for sheep, which is suitable for blood vessel perfusion test of sheep. Background technique [0002] The nutrient metabolism of the animal body is a dynamic process that is constantly changing, and the vascular cannulation technology has unique advantages in the study of the dynamic process of nutrient metabolism. By placing a permanent vascular cannula in a certain part of the animal body, the continuous blood collection of the animal body or the input of metabolic intervention substances can be realized, and the metabolic dynamics of the animal body can be effectively monitored. The external pudendal arteries on both sides of the animal mammary glands are the main arteries supplying the mammary blood flow of lactating animals such as sheep, goats, and dairy sheep, and the external pudendal arteries on both sides provide blood to the ...

AI Technical Summary

Problems solved by technology

[0003] In the previous vascular perfusion test of sheep, there was no vascular cannulation material suitable for sheep on the market, so in previous experiments, human central venous catheter or human epidural anesthesia catheter was used to replace the blood cannulation material. The two kinds of medical materials for humans are expensive and difficult to purchase, and the size of the medical materials for humans is not completely suitable for sheep. There are also differences in the distribution of blood vessels between humans and sheep. There are many problems in the test of human medical materials

For example, the external pudendal artery of a sheep is located at the junction of the inner side of the hind leg and the abdominal breast and is covered by muscle. The operation needs to peel off the muscle to expose the blood vessel. The materials of the two kinds of catheters are too soft to be inserted quickly and successfully. produce blockage

Since part of the catheter in the body needs to be effectively fixed after the muscle is stripped, otherwise it is easy to slide in the body and make the follow-up surgical care more difficult. However, the two types of catheters for human use do not need to consider the problem of catheter fixation in the body. There is currently no effective fixation material in the body. Instead of materials, sutures are used to suture the catheter in the body to the nearby tissue, but this method cannot completely fix the catheter, and the catheter is easy to slip and cause the test to fail

After the catheter is inserted, a constant flow pump is required to perfuse the blood vessel with nutrients or drugs. Currently, the connecting device of the catheter outside the body is replaced by a needle, and the size of the human central venous PICC catheter and the human epidural anesthesia catheter will be different when connected to the needle. Insufficient sealing of the interface leads to leakage of perfusate, resulting in test failure

[0004] In summary, the two traditional blood cannula materials have problems such as high technical requirements, high cost, unsuitable size, and insufficient fixation of the catheter in the body. Therefore, a blood cannula assembly suitable for sheep is needed to facilitate catheter insertion , Internal and external fixation of the catheter

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