High-precision venous drainage device

Abstract

The invention discloses a high-precision venous drainage device. The device comprises an external panel, a negative pressure source access port, a pressure regulating airway, a negative pressure outlet, an airway control switch and a visible pressure display device; the pressure regulating airway can control the negative pressure in a high-precision mode; the pressure regulating airway then adjusts and controls the pressure through formed specific vortexes; the device has the positive and negative pressure protection function, that is, positive pressure protection and high negative pressure protection are provided, and risks in the use process are prevented. By means of the device, the venous blood drainage amount can be increased only by loading a stable negative pressure source to a closed blood storage device, and the method is simple and convenient to use. Except that small venous cannulas can be used and tissue injury is reduced, the pipeline of a cardiopulmonary bypass device (CPB) can be miniaturized, the priming volume of the CPB is thus reduced, the blood dilution degree is significantly reduced, and the platelet consumption is reduced.

Description

technical field [0001] The invention relates to a venous drainage device, in particular to a venous drainage device with adjustable negative pressure. Background technique [0002] During cardiopulmonary bypass (CPB) cardiac repair, the heart draws blood from the superior vena cava (VS), inferior vena cava (VCI) or atrium through one or more venous catheters into the oxygenator and the blood pump back to itself due to negative pressure artery. In practice, due to different arterial blood flow and return flow, the fixed negative pressure provided by the negative pressure source is not enough to meet the individual needs of the current operation. It is necessary to design and manufacture a negative pressure adjustment device for venous drainage. [0003] Patent CN202143745U is a transparent negative pressure drainage device for arterialized venous flaps. It uses medical self-adhesive and medical sponge to form a negative pressure drainage area. After connecting to a negative ...

AI Technical Summary

Problems solved by technology

[0004] Patent CN202376607U provides a low negative pressure continuous flushing device, which is designed to be close to the clinic, relying on multi-pipe pressure partial pressure and connecting to the atmosphere to achieve negative pressure pressure control, to a certain extent avoiding damage caused by improper human operation, negative pressure It is difficult to adjust the pressure, the pressure control is not accurate enough, and the scope of application is limited to the aspects of effusion, wound surface attraction, etc.

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