Environment-friendly multifunctional composite negative-pressure drain wound-protection sponge and preparation method thereof

Abstract

The invention discloses an environment-friendly multifunctional composite negative-pressure drain wound-protection sponge and a preparation method thereof. The sponge comprises the following components by mass percentage: 5-30% of polyvinyl alcohol, 10-30% of an aqueous polyurethane performed polymer, 0.1-1% of a catalyst, 0.02-0.5% of a surfactant, 5-10% of medical Vaseline, 5-10% of medical lightweight paraffin oil, 5-10% of sodium hyaluronate, and the balance of purifying water. The wound-protection sponge combines foaming technology general characteristics of PVA and PU, which organically combines the excellent performances of PVA and PU, by adding the sodium hyaluronate, sponge water absorption, water retention performance, water absorption rate of the sponge are increased, a supercritical CO2 foaming mode is used, and the chemical residue of the sponge is reduced, the sponge water absorption is increased by 22 times and more, the water retention performance is increased by 7-10 days, the water absorption rate of the sponge is increased by at least one time, which can reach 10-12 g / min.g, and the sponge has good antistick effect.

Description

technical field [0001] The invention relates to a medical negative pressure sponge, in particular to an environment-friendly multifunctional composite negative pressure drainage and wound protection sponge and a preparation method thereof. Background technique [0002] Negative pressure drainage therapy (NPWT, negative pressure wound therapy), also known as closed negative pressure drainage technology (VAC, vacuum-assisted closure), is to use a negative pressure suction device connected to a special wound dressing, intermittently or continuously on the wound surface A wound treatment method that generates subatmospheric pressure to promote wound healing. Negative pressure sealing drainage technology is currently widely used in the fields of burns, wound repair, and plastic surgery. It stimulates granulation growth and promotes wound healing through negative pressure. The curative effect is worthy of recognition. [0003] But at present, PVA sponge or PU sponge cannot meet t...

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Problems solved by technology

[0003] However, at present, PVA sponge or PU sponge cannot meet the clinical needs alone.

PVA sponge tends to become dry and hard during negative pressure drainage treatment. If the water is not replenished in time, it will cause discomfort to the patient and cause secondary damage to the wound due to the friction between the dry hard sponge and the wound during the patient's exercise; Hydrophobic characteristics, the water retention rate is not strong, can only rely on negative pressure to continuously attract seepage

And PVA sponge or PU sponge is used alone, because of its large porosity and intercommunication between the cavities, it will cause the wound granulation tissue to grow into the cavities. When the negative pressure is released, it will also cause secondary damage to the wound, resulting in bleeding

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