Large animal percutaneous puncture femoral artery catheterization blood sampling device

Abstract

The invention belongs to the technical field of blood sampling devices, and particularly relates to a large animal percutaneous puncture femoral artery catheterization blood sampling device. The device comprises a puncture needle, an indwelling needle, a blood sampling needle and a hollow shell, wherein a piston is slidably connected in the hollow shell, and the piston is connected with a handle; a gap is formed between the piston and the interior of the upper end of the hollow shell and forms a blood storage pool; the remaining needle is fixed to the upper end of the hollow shell and communicated with the blood storage pool, a liquid bag is arranged in the blood storage pool, and the remaining needle and the blood storage pool can be blocked by squeezing the liquid bag through the piston. The blood taking needle is located in the hollow shell and is in sliding connection with the piston, and a corresponding through hole is formed in the piston; the blood taking needle is of a hollow structure, openings are formed in the two ends of the blood taking needle, the upper end of the blood taking needle is close to the liquid bag, an anti-overflow plug is arranged at the opening of the upper end, and a blood taking hole is formed in the upper end of the blood taking needle. The puncture needle sequentially penetrates through the blood taking needle, the anti-overflow plug and the liquid bag through the opening and extends out of the indwelling needle; through the structural arrangement, single-person puncture, tube sealing and blood sampling can be conveniently achieved.

Description

technical field [0001] The invention belongs to the technical field of blood collection devices, and in particular relates to a large animal percutaneous femoral artery catheterization blood collection device. Background technique [0002] Large animals (monkeys, pigs, dogs, sheep, etc.) are widely used in experiments in related fields of medicine. In the study of pharmacokinetics of new radioactive drugs, continuous arterial blood collection is required, and the interval between blood collections is short (about 5.0s). At present, femoral artery puncture sheath is commonly used for arterial blood collection in large animals. After the puncture needle punctures the femoral artery, the guide wire is inserted, the arterial sheath is inserted under the guidance of the guide wire, and blood is collected after the guide wire is withdrawn to fix the sheath. Workbench contamination. Furthermore, the femoral artery of a large animal is thinner than the radial artery of a human, an...

AI Technical Summary

Problems solved by technology

The interval between blood collection is short, so that the conventional heparin tube sealing and the withdrawal of diluted blood cannot be completed; the amount of blood collection is small, and it must be ensured that no blood can be retained in the indwelling needle and the blood collection device, otherwise the blood collected twice before and after will be mixed, resulting in low blood collection accuracy

[0005] At present, the Baoding method is mostly used for large animals, but the animal’s limbs can still be moved and needs to be fixed artificially. When the conventional venous indwelling needle is indwelling for blood collection, three people are required to cooperate. Manage and complete the operation of withdrawing and discarding diluted blood, and a third person collects blood, which not only has high labor costs for blood collection, but also troublesome operation

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