An exhaust device for cardiac surgery

Abstract

The invention discloses an air exhausting device used for cardiac surgery, and relates to the field of medical apparatus and instruments. The device comprises an air exhausting needle, the air exhausting needle comprises a needle tube and a needle point connected with the tail of the needle tube. The device further comprises a protection belt, a limiting part is mounted at the position, 3-5 mm away from the needle point, of the needle tube, one end of the protection belt is fixed to the limiting part, the other end of the protection belt is movably connected with the limiting part, the tail ofthe needle tube communicates with a blood buffer device, a liquid outlet is formed in the upper part of the blood buffer device, a liquid outlet pipe communicates with the liquid outlet, a pipe clipis further arranged on the liquid outlet pipe, a blood mixer communicates with the end of the liquid outlet pipe, and a liquid inlet pipe and a guide pipe further communicate with the blood mixer. Compared with the prior art, the air exhausting device provided by the invention has the advantage the air exhausting effect is increased, and meanwhile, the operation of medical workers is facilitated.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to an exhaust device for heart surgery. Background technique [0002] The exhaust needle mainly plays the role of exhausting the gas in the blood vessel during cardiac surgery. After the left heart operation is completed in conventional cardiac surgery, the exhaust needle should be inserted into the blood vessel wall, and the needle tip of the exhaust needle should be all in the blood vessel. Internally, the high pressure in the blood vessel is used to make the blood in the blood vessel enter the needle tube through the needle tip, and then when the blood is discharged from the body through the needle tube, the gas in the blood vessel is also discharged outside the blood vessel to prevent gas embolism during and after the operation. [0003] However, there are following defects in the exhaust needle routinely used clinically at present: [0004] After the degassing needle is inse...

AI Technical Summary

Problems solved by technology

[0004] After the degassing needle is inserted into the blood vessel, the effect of degassing is also affected due to the different depths of insertion into the blood vessel. If the depth of insertion into the blood vessel is too shallow, part of the needle tip will still be in the tube wall, and the other part of the needle tip will be in the blood vessel, which will cause The mouth of the blood entering the needle tube becomes smaller, and it is completely in the blood vessel relative to the needle tip. If it is too little, the rate of blood and gas entering the needle tube will be affected in the same time, which will affect the exhaust effect; when the needle tip is inserted too deep into the blood vessel, Because the inserted exhaust needle is not fixed, the sharp needle tip will move inside the blood vessel under the influence of the flowing blood, and the range of motion becomes larger because the inserted needle tip is too long, which not only affects the exhaust effect, but also damages the blood vessel Intima

[0005] The exhaust needle only uses the pressure difference between the inside of the blood vessel and the gas to discharge the blood and discharge the gas at the same time. This method of exhausting, the exhaust pressure is small, resulting in poor exhaust effect

At the same time, the exhaust needle gathers the discharged blood in the thoracic cavity and pericardial cavity, requiring medical staff to use an intracardiac suction device to continuously suck the blood out of the thoracic cavity and pericardial cavity, which increases the difficulty of operation for medical staff

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