Type A is composed of medical polyurethane sponge, medical film, suction - cup - type connector, suction tube, external drainage tube, straight - through connector, three - way connector, and Robert clamp. 

Type B is composed of medical polyurethane sponge, medical film, suction tube, straight - through connector, three - way connector, and Robert clamp. 

Scope of application: Used for drainage of non-chronic wounds (such as postoperative suture wounds, mechanical trauma, cut wounds, and superficial second-degree burn wounds).

Advantages of Negative Pressure Wound Therapy 

Negative pressure sealing can continuously drain exudate, necrotic tissue and bacteria from the wound surface, achieving "zero accumulation" in the covered area;

Increase blood supply to wound surface, improve wound microcirculation, and promote the growth of granulation tissue;
The closure isolates the drainage area from the outside world, effectively preventing contamination and cross infection;

It can promote the healing of chronic wounds, quickly start the healing process of skin wounds, reduce the apoptosis period of repair cells, and accelerate wound healing.

Medical polyurethane sponge
※ It has loose pores, is soft and elastic, which can make the negative pressure evenly distributed at the wound site.
※ It is a hydrophobic material, which is not conducive to the adhesion of hydrophilic bacteria and proteins.
※ It can be cut at will and is suitable for wounds in different parts and of different shapes.
※ Under the action of negative pressure, it can be compressed to less than half of its original volume. The drainage tube is not easy to be blocked and does not harden easily, ensuring unobstructed drainage.
※ It has stable chemical properties, is not easy to deform after long - term use, and has excellent biocompatibility. 

Drainage suction cup
※Unique structural design, with dual functions of drainage and flushing, flushing the dosing hole separately, more convenient operation;
※Large diameter drainage catheter, reducing the chance of blockage;