High-absorptivity wound dressing

Abstract

The invention provides a high-absorptivity wound dressing which comprises a backing layer, a reinforcing layer, an absorbing layer and a super absorbing layer, and the absorbing layer can be a melt-blown non-woven fabric pad, a three-dimensional casting made of composite fibers, polyurethane foam or a combination of two or more of the melt-blown non-woven fabric pad, the three-dimensional casting made of the composite fibers and the polyurethane foam; the absorbing layer at least contains one or more of composite gel fibers, non-gel fibers, biodegradable components and at least one or more of antibacterial components; and the super absorbing layer at least contains one kind of high-absorptivity polymer particles which are wrapped in a double-layer non-woven fiber net or foam. The high-absorptivity wound dressing not only can vertically wick and store a large amount of seepage, but also is high in softness and good in fitting degree, and leakage and pain of a patient are reduced to the maximum extent.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and relates to a wound dressing, which specifically includes a high-absorption material that can vertically wick and store a large amount of exudate, has high flexibility, good fit, and minimizes leakage and patient pain. Sexual wound dressing and method for its preparation. Background technique [0002] Wound exudate management is a big problem and a huge challenge because exudate can be quite volumetric and very variable. Possible causes of hyperexudate include the following: [0003] 1. Chronic inflammatory responses can lead to highly exudative wounds (Hart, 2002). Inflammatory ulcers such as those associated with rheumatoid arthritis or vasculitis, large wounds naturally produce more exudate, and burns produce more exudate (UK Wounds, 2013). [0004] 2. Lymphatic obstruction or failure secondary to other pathophysiological causes, such as venous hypertension that prevents reabsorp...

AI Technical Summary

Problems solved by technology

[0004] 2. Lymphatic obstruction or failure secondary to other pathophysiological causes, such as venous hypertension that prevents fluid reabsorption from tissues back into lymphatic vessels

[0006] 4. Patients who sleep in a chair at night or do not elevate their legs effectively will experience heavier exudates from their feet and calves due to gravity and often manifest as skin changes such as macerated toes or heels The tissue around the wound becomes "wet," more fragile and more easily damaged

[0009] 7. Certain wound treatments may increase (or significantly increase) fluid loss from the wound

[0011] 1. Excess wound fluid and excessive levels of proteases have been shown to interfere with wound healing, and these proteases (matrix metalloproteinases MMP in chronic wound exudate) damage healthy tissue, thereby complicating the healing process and causing environmental macerated skin, broken and peeled skin, enlarged wound, increased discharge, and increased pain

[0012] 2. When the dressing is saturated and moisture penetration occurs, there is a risk of infection

[0013] 4. Large amounts of exudate not contained in the dressing can leak and stain the patient's clothing, footwear, or bedding

[0018] Described in CN101721733B is a kind of chitosan fiber spinning, be cut into short fiber, on the chitosan short fiber spray-coated silver-loaded nano-titanium dioxide particle, the medical chitosan antiseptic dressing that makes, this dressing is owing to only using shell Polysaccharide fiber, the fiber strength is not enough, it is easy to break during use, resulting in fragments

[0021] 1. There is a type of foam exudate dressing on the market. The dressing itself is not designed to store a large amount of exudate, but absorbs a large amount of exudate from one side of the dressing, and then evaporates a large amount of water in the exudate through the other side. A large amount of evaporation leads to The wound dries out and sticks to the foam, causing wound damage and great pain to the patient when the dressing is removed;

[0022] 2. In addition, this type of dressing has no ability to retain exudate, and cannot retain exudate against gravity. In addition, when subjected to external pressure (such as a patient with a large amount of venous venous ulcer exudation in the lower extremity, accompanied by edema of the lower extremity with a pressure bandage), the dressing's The absorption capacity will be reduced. When the external pressure reaches a certain level, such as the dressing on the bedsore of an obese patient, the exudate under pressure will be squeezed out of the dressing;

[0023] 3. Due to the open structure of the foam, it does not prevent the lateral expansion of seepage;

[0024] 4. When a large amount of exudation occurs, the ability to absorb liquid is limited, resulting in maceration of the surrounding skin;

[0025] 5. It is easy to be infected for a long time, and there are reports of foul-smelling discharge

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