Schematic diagram of two NPWT sponge placement methods.

Abstract

(A-C) Centripetal reduction method. Take the whole sponge and place it at the incision. After the wound surface is gradually reduced, replace it with a smaller sponge. (D) Subsection reduction method. Trim the sponge into several pieces, each with a width of 1cm and a thickness of 1cm. They were placed at intervals to the incisions, sutured at 2 cm intervals, and the separated sponges were connected to the main sponge.</p

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