Negative pressure sealing drainage device of surface wound tissue

Abstract

A negative pressure sealing drainage device of a surface wound tissue comprises a porous foam cushion (1) which contacts with the surface wound, a drainage tube (2) with a side port, a sealing film (3), a connector (4), a catheter (17), a drainage container (5), a negative pressure source (6), an adhesive film (7) and an eduction tube (8), The adhesive film (7) is located above the porous foam cushion (1); the opening direction of the side port on the drainage tube (2) contacts with the porous foam cushion (1); the eduction tube (8) is communicated with the drainage tube (2) and located abovethe adhesive film (7); the sealing film (3) is sealed on the adhesive film (7); the eduction tube (8) is pumped into the drainage container (5) through the catheter (17); and the drainage container (5) is connected with the negative pressure source (6) through the catheter (17). The device leads the porous foam cushion to be capable of prolonging the time of maintaining flexibility and moist environment, is beneficial to wound healing, and has the advantages of convenient and reliable sealing and drainage.

Description

technical field [0001] The invention relates to a negative pressure sealing and drainage device for body surface wound tissue. It is specially designed for the treatment of various surface tissue rupture areas, and is used for the treatment of trauma, burns, infection, compression, endocrine disorders, vascular occlusion, radiation exposure, surgery, surgical complications, insect bites, etc. It is a device for negative pressure sealing and drainage treatment of wounds caused by low temperature, freezing injury and other reasons. Background technique [0002] Vacuum sealing drainage (VSD, referred to as VSD technology) was first created by Dr. Wim Fleischman of ULM University in Germany in 1992, and formed a theoretical prototype for the drainage of extremity wounds; in 1994, Professor Qiu Huade of China applied VSD technology for the first time In general surgery, he pioneered the application of VSD technology in general surgery. The patent CN 2276350 authorized by Profess...

AI Technical Summary

Problems solved by technology

[0007] However, the existing VSD technology still has the following problems in the use of body surface wound drainage: ①, inconvenient sealing

But above-mentioned sealing method is all very loaded down with trivial details in actual operation, and surgeon all needs to carry out repeated operation and practice just can master.

Inadequate sealing is often the main cause of air leakage, which will weaken or even fail the therapeutic effect of the VSD system due to air leakage

②. The outlet end of the drainage tube is used as the outlet for negative pressure conduction and drainage. There are few outlet directions for negative pressure conduction and drainage, and there are often only vertical or horizontal negative pressure conduction and drainage in a single direction, which is prone to uneven negative pressure conduction and blockage. Pipe phenomenon, and when the pipe is blocked, it is not convenient to flush

The commonly used flushing methods are: 1. Put another rubber tube on the wound surface, but it is also necessary to use the "mesangial method" to seal the leading position of the rubber tube, which increases the possibility of "air leakage" and the difficulty of sealing; 2. 1. Retrograde injection of irrigating fluid from the original drainage tube may reinject the drained exudate into the wound surface, causing "retrograde infection"; Re-paste the sealing film at the hole, which increases the difficulty of operation

③. For large irregular wounds, drainage is inconvenient

It may also lead to moisture impregnation between the skin and the sealing film, the adhesiveness of the sealing film disappears, and it is detached from the skin surface, and then air enters the sealing area, which eventually leads to a decrease in the drainage effect of the negative pressure seal, or even complete failure

The porous foam cushion needs to be completely sealed, and it is required that the permeability of the sealing film should be as small as possible, otherwise the porous foam cushion will lose moisture due to long-term tiny air circulation, making the porous foam cushion dry, and eventually Causes the porous foam cushion to lose its elasticity and moist environment, delaying the wound healing time; thus this forms a contradiction in the existence of two counteracting demand principles in a whole

However, the existing sealing films cannot simultaneously meet the requirements of healthy skin for normal water permeability, ventilation, metabolism and porous foam cushions that need to be tightly sealed.

⑤For larger wounds, when more than two porous foam cushions are needed, the drainage tube with side holes in the cushion is often pulled out, and the surgeon cuts out more side holes on the drainage tube, and extends the drainage tube with side holes. The length of the drainage tube, and then splicing, series or parallel connection of porous foam cushions, the operation is extremely cumbersome

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