Knowledge

Advantages and disadvantages of various medical dressings



Medical dressings are medical dressings used to cover wounds, wounds or other injuries.

With the in-depth study of the pathophysiology of the wound healing process, people's understanding of the wound healing process has become more and more profound, which has promoted the continuous improvement and development of wound dressings.


First, passive dressing

Passively cover the wound and absorb exudate, such as natural gauze, cotton pad, etc.


Natural gauze

This is the earliest and most widely used type of dressing. Its main advantages are:

1, strong and fast absorption of wound exudate

2. Material economy

3, the production process is simple


The main disadvantages are:

1, permeability is too high, easy to dehydrate the wound

2, sticking the wound, causing re-mechanical damage when replacing

3, the external environment microorganisms are easy to pass, the chance of cross infection is high

4, the amount of use, frequent replacement, time-consuming and patient suffering


Second, the interactive dressing

There are many forms of interaction between the dressing and the wound, such as absorbing exudate, maintaining gas exchange, thereby creating an ideal environment for healing, a barrier outer structure, preventing microbial invasion in the environment, and preventing cross-infection of wounds. Wait. Such as poly film type dressing, foaming polymer type dressing, hydrocolloid dressing, alginate dressing.


Polymembrane dressing

This is a kind of relatively advanced dressing, which has the characteristics that oxygen, water vapor and other gases can be freely permeable, and particulate foreign matter such as dust and microorganisms cannot pass through in the environment.


Therefore, such dressings have the following advantages:

1. Block environmental microbes from invading wounds and prevent cross-infection.

2, has moisturizing properties, so that the wound surface is moist, will not stick to the wound surface and will not cause re-mechanical damage when replacing.

3, self-adhesive, easy to use, and transparent, easy to observe the wound situation.


The main disadvantages are:

1. Poor absorption of liquid permeability.

2. The cost is relatively high.

3, the skin around the wound is a great opportunity for impregnation.

Therefore, such dressings are mainly used for wounds that are postoperatively and have little exudation, or as an auxiliary dressing for other dressings.


Foamed polymer dressing

This is a type of dressing that is foamed by a polymer material (PU). The surface is often covered with a layer of polypermeable semipermeable membrane, and some are also self-adhesive.


The main advantages are:

1. Fast and powerful exudate absorption capacity.

2, low permeability, so that the wound surface is kept moist, avoiding re-mechanical damage when changing dressings.

3, the surface semi-permeable membrane barrier properties, can prevent the intrusion of environmental particulate foreign matter such as dust and microorganisms, to prevent cross-infection.

4, easy to use, good compliance, can be suitable for all parts of the body.

5, heat insulation, buffering external impulses.


The disadvantages are:

1, due to too strong absorption performance, for low-bleeding wounds may affect its own debridement process.

2. The cost is relatively high.

3, due to opacity, it is not convenient to observe the wound.


These dressings have a wide range of adaptations, including a variety of medium to high exudation wounds, such as acne, lower extremity ulcers, and the like.