Anti-backflow and blockage-proof negative pressure drainage device

Abstract

The invention relates to an anti-backflow and blockage-proof negative pressure drainage device, which comprises a liquid inlet valve spool (2), a liquid drainage valve spool (7), left and right valve bushes (1 and 5), left and right valve bonnets (4 and 9), a needle barrel connecting tube (6), a liquid outlet connecting tube (12), a left spring (3) and a right spring (8). The liquid inlet valve spool (2) which only allows body liquid to flow rightwards is disposed in the left valve bush (1), the liquid drainage valve spool (7) which only allows the body liquid to flow to a right lower direction is arranged in the right valve bush (5), and the needle barrel connecting tube (6) and the liquid outlet connecting tube (12) are respectively connected with the right valve bush (5) via glue; and the body liquid can be led out via vertical movement of a piston (11) in a needle barrel (10) and then is drained to a container. The anti-backflow and blockage-proof negative pressure drainage device has the advantages that the device is smooth in drainage, not easy to cause blockage and high in drainage efficiency, can prevent backflow of the body liquid under the condition that negative pressure is instable or is removed suddenly, avoids possibility of infection caused by backflow of the body liquid, and is convenient in use and easy to be controlled by medical staffs and family members of patients.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to an anti-backflow and anti-blocking negative pressure drainage device. Background technique [0002] Negative pressure drainage is a treatment measure after surgery on oral and maxillofacial surgery, breast cancer, esophagus, cardia, and gastrointestinal tract. Adequate drainage can suck out exudate and secretions on the wound surface in time to reduce edema and inhibit bacterial growth; Healing of anastomotic stoma and skin wound, prevention of postoperative complications. Skin expander implantation and breast augmentation in plastic surgery all have prostheses, and a cavity will be formed under the skin of the wound, which requires effective drainage to reduce effusion, skin flap necrosis, infection, etc. For patients with empyema, drainage of pneumatosis and effusion in the pleural cavity as soon as possible can remove pus, eliminate abscess cavity, make lung re-expand early, an...

AI Technical Summary

Problems solved by technology

But in use, it is found that if the drainage fluid is viscous (such as gastric juice, bile, pancreatic juice secretion, blood clot, etc.), the negative pressure suction of this spring-type negative pressure drainage device is not strong enough, and the phenomenon of poor drainage is common, resulting in Pus accumulates in the body, aggravating infections such as the abdominal cavity

The other is negative pressure drainage with a syringe, which uses the syringe barrel to connect the end of the drainage tube for suction. Use the syringe to draw and extrude a tube. The operation is very troublesome, and the amount of extraction each time is not much; The diameter of the nipple hole is very small, and it is often blocked by food residues or other condensates in the stomach. It is necessary to use a syringe to repeatedly flush the blockage with saline, which is laborious and time-consuming; if you do not pay attention, it will cause backflow of body fluids, causing retrograde Infect

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