Medical dressing:

Medical dressings are wound dressing supplies, medical materials used to cover sores, wounds or other damage. With the in-depth study of the pathophysiology of wound healing process, people have a more and more profound understanding of the process of wound healing, which leads to the continuous improvement and development of medical wound dressing. Today, compared with the early stage, the new dressing for wound care has undergone revolutionary changes, and a variety of different performance of medical dressing for clinical nursing staff to choose. At present, alginate dressing is the most advanced medical dressing in the world.

Various medical dressing characteristics:

1, natural gauze: (cotton pad) This is the earliest and most widely used dressing.

Advantages:

(1) Strong and rapid absorption of wound exudate

(2) The production and processing process is relatively simple

Disadvantages:

(1), the permeability is too high, easy to make the wound dehydration

(2) Stick to the wound surface, replacement will cause re-mechanical damage

(3) External environmental microorganisms are easy to pass through, and the chance of cross infection is high

(4), the amount of much, frequent replacement, time-consuming, and patients suffering, due to the reduction of natural resources, the cost of gauze is also gradually increasing, therefore, in order to avoid excessive use of natural resources, the application of polymer materials (synthetic fibers) processing into medical dressing, this is synthetic fiber dressing.

2. Synthetic fiber dressing:

This kind of dressing has the same advantages as gauze, such as economy, and has good absorption properties, and some products are also self-adhesive, making it very convenient to use. However, this kind of product also has the same shortcomings as gauze, such as high permeability, no barrier to particulate pollutants in the external environment.

3. Polymer film dressing:

This is a kind of relatively advanced dressing, with oxygen, water vapor and other gases can be freely permeable, and granular foreign bodies such as dust and microorganisms in the environment can not pass through the characteristics.

Advantages:

(1) Prevent environmental microorganisms from invading the wound and prevent cross infection

(2), moisturizing, so that the wound is moist, will not stick to the wound, so as not to produce the replacement of mechanical damage again

(3) Self-adhesive, easy to use, and transparent, easy to observe the wound condition

Disadvantages:

(1) Poor absorption and seepage capacity

(2) The cost is relatively high

(3) The skin around the wound has a large chance of dipping, so this kind of dressing is mainly applied to the wound after surgery and does not exude much, or as an auxiliary dressing of other dressings.

4. Foaming polymer dressing

This is a kind of dressing made by foaming polymer material (PU), the surface is often covered with a layer of poly semi-permeable film, some also have self-adhesive.

Advantages:

(1) Rapid and powerful absorption capacity of exudate

(2) Low permeability, so that the wound surface is kept moist, to avoid the recurrence of mechanical damage when changing the dressing

(3) The barrier performance of the surface semi-permeable film can prevent the invasion of environmental granular foreign bodies such as dust and microorganisms and prevent cross infection

(4) Easy to use, good compliance, can be suitable for all parts of the body

(5) Heat insulation, heat preservation, buffer external impulse

Disadvantages:

(1) Due to the strong absorption performance, the self-debridement process may be affected for the low-degree exudation wound

(2) The cost is relatively high

(3) Because of opacity, it is not convenient to observe the wound surface

5, hydrocolloid dressing:

Its main component is a very strong hydrophilic ability of the hydrocolloid -------- sodium carboxymethyl cellulose particles (CMC), and hypoallergenic medical viscose, plus elastomer, plasticizer together to form the main body of the dressing, the surface is a layer of semi-permeable polymer film structure. After contact with the wound exudate, the dressing can absorb the exudate and form a gel to avoid the dressing sticking to the wound; At the same time, the surface of the semi-permeable membrane structure can allow the exchange of oxygen and water vapor, but also has the barrier to the outside particles of foreign bodies such as dust and bacteria.

Advantages:

(1), can absorb wound exudate and some toxic substances

(2) Keeping the wound moist and retaining the bioactive substances released by the wound itself can not only provide an optimal micro-environment for wound healing, but also accelerate the process of wound healing

(3) It has debridement effect

(4) Gel is formed to protect exposed nerve endings and reduce pain. At the same time, no mechanical damage will be caused again when changing the dressing

(5) Self-adhesive, easy to use

(6) Good compliance, users feel comfortable, and the appearance is hidden

(7) Block the invasion of external granular foreign bodies such as dust and bacteria, replace dressing less, so as to reduce the labor intensity of nursing staff, because of speeding up wound healing, can save costs

Disadvantages:

(1) The absorption capacity is not very strong, so for highly exudative wounds, other auxiliary dressings are often needed to enhance the absorption performance

(2) High product cost

(3) Individual patients may be allergic to the ingredients, so it can be said that this is a kind of ideal dressing. Decades of clinical application experience in foreign countries shows that hydrocolloid dressing has a particularly prominent effect on chronic wounds.

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