A high-precision venous drainage device

Abstract

The invention discloses a high-precision venous drainage device, which comprises an external panel, a negative pressure source inlet, a pressure regulating airway, a negative pressure output port, an airway control switch and a visual pressure display device; the pressure regulating airway can be highly Accurately control the magnitude of negative pressure; the pressure-adjusting airway forms a unique vortex to adjust the control pressure; the positive and negative pressure protection function provides positive pressure protection and high negative pressure protection to prevent danger during use. Utilizing the invention, it is only necessary to load a stable negative pressure source into the airtight blood storage container to increase the drainage of venous blood, and the method is simple and convenient. In addition to using a small venous cannula to reduce tissue trauma, it can also miniaturize the circuit of the extracorporeal circulation device (CPB), thereby reducing the amount of CPB priming, significantly reducing blood dilution, and reducing platelet consumption.

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] In the process of cardiopulmonary bypass (CPB) cardiac repair, the blood of the heart is sucked from the superior vena cava (VS), inferior vena cava (VCI) or atrium due to negative pressure through one or more venous catheters into the oxygenator and blood pump back to itself artery. In practice, because of different arterial blood flow and reflux, 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 regulator for venous drainage. [0003] Patent CN202143745U is an arterialized venous flap transparent negative pressure drainage device, which uses medical self-adhesive and medical sponge to form a negative pressure drainage area. After the negative pressure so...

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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