A micro-dynamic negative pressure liquid-absorbing wound-protecting material and its preparation method

Abstract

The invention relates to the technical field of medical auxiliary articles and discloses a novel micro-power negative pressure liquid-absorbing nursing wound material which comprises a sponge layer and a dense layer; the dense layer is arranged on one surface of the sponge layer. The invention also discloses a preparation method of the novel micro-power negative pressure liquid-absorbing nursing wound material. The preparation method comprises the following steps: 1, dissolving polyvinyl alcohol, carboxymethyl chitosan, purified water, sulfuric acid and formaldehyde according to a specific ratio, a specific program and conditions for synthesis, and preparing to obtain a PVA reaction system solution, 2, preparing the PVA reaction system solution into medical sponge with the dense layer on one surface with a precipitation method or a coating method according to a specific condition; 3, cleaning and centrifugally dewatering the medical sponge, and then carrying out drying treatment or vacuum freezing treatment for drying; and 4, fixing and compressing the medical sponge, and finally cutting the medical sponge into slices for formation. By adopting the novel micro-power negative pressure liquid-absorbing nursing record material provided by the invention, by adding the dense layer as a barrier layer, liquid leakage and wound pollution are effectively prevented; and dry-state soft sponge enables the liquid-absorbing degree and speed to be more increased to form micro-power negative pressure. The preparation method provided by the invention is simple to operate and strong in product applicability and is suitable for application and development of clinical medicines.

Description

technical field [0001] This patent relates to the technical field of medical aids, in particular to a novel microdynamic negative pressure liquid-absorbing wound-protecting material and a preparation method thereof. Background technique [0002] In the current surgical treatment, traditional dressings such as medical gauze and cotton pads are often used to cover the wound surface. Due to the slow absorption rate and limited amount of liquid absorption of such dressings, they are easy to be infiltrated by exudate and cause infection; traditional dressings are easy to stick during treatment. Wounds, patients often need to bear great pain when changing dressings. In recent years, vacuum sealing drainage technology (Vacuum Sealing Drainage, VSD) has gradually been used clinically instead of traditional dressing change therapy. This technology uses special materials to cover and seal the wound, and drains the wound surface under appropriate negative pressure conditions. To promo...

AI Technical Summary

Problems solved by technology

In clinical use, because the corners of the sponge harden first, the PVA sponge will compress the wound under negative pressure, which greatly affects the blood oxygen supply of the wound, and then causes iatrogenic damage to the wound, which is not conducive to the treatment and rehabilitation of the wound.

[0005] 2) Cannot be used alone

However, the use of medical film to seal the wound is a cumbersome operation with a high failure rate, resulting in the failure to form a closed system and making VSD technology unable to work normally.

In addition, the matching medical film also increases the medical burden of patients

[0006] 3) There is no specific compression process in the existing preparation methods, so that the current PVA sponge absorbs water slowly and has a low degree of water absorption

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