Absorption dressing special for laparoscopic surgery

By designing a layered composite dressing, including a hydrophilic guiding layer, an absorbent foam layer, and a hydrophobic protective layer, combined with functional components, the problem of exudate management and inflammation control in laparoscopic wounds has been solved, achieving efficient wound healing and clinical adaptability.

CN121647901APending Publication Date: 2026-03-13NANJING PUKOU HOSPITAL
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Patent Information

Application Number
CN202610092052.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-23
Publication Date
2026-03-13

AI Technical Summary

Technical Problem

Existing dressings are ineffective in managing wound exudate after laparoscopic surgery, leading to the risk of retained infection. Mismatched shapes affect drainage and may cause side leakage. They also lack the function of inhibiting excessive inflammation and controlling microorganisms.

Method used

A layered composite dressing is designed, comprising a hydrophilic guiding layer, an absorbent foam layer, and a hydrophobic protective layer. An oriented fiber membrane is formed through a dynamic collection process, and functional components such as silver ions, chitosan, and ZnO nanoparticles are combined to achieve exudate management, wound protection, and microenvironment regulation.

Benefits of technology

This dressing optimizes the wound's mechanical directionality, inflammatory intensity, and exudate load through a triple coupling control of physical, chemical, and fluid dynamics, reducing postoperative local induration and exudation complications, and improving clinical fit and efficacy.

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Abstract

The invention discloses a special adsorption dressing used after a laparoscopic surgery, and belongs to the technical field of medical dressings. The dressing is of a layered composite structure and sequentially comprises a hydrophilic guide layer, an absorption foam layer and a hydrophobic protective layer from inside to outside, the hydrophilic guide layer is an electrospun fibrous membrane formed by micro / nano fibers oriented along a specific direction; the absorption foam layer is made of a foam material with high aperture ratio; the hydrophobic protective layer is a breathable hydrophobic film; the preparation method mainly comprises the steps of preparation of each functional layer and composite molding through a low-temperature hot pressing process. According to the dressing, through the synergistic effect of the three layers of materials, directional and rapid absorption and storage of percolation of a postoperative puncture hole are achieved, tissue regeneration guidance is provided, the skin around a wound is effectively prevented from being hardened, and the dressing is antibacterial, anti-inflammatory, good in fitting performance and beneficial to wound healing.
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