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. 2012 Jun 4;10(4):383–388. doi: 10.1111/j.1742-481X.2012.00994.x

Figure 6.

Figure 6

Tissue deformation monitored with high frequency diagnostic ultrasound (HFDU) scans through gauze and film dressing as−80 mmHg negative pressure wound therapy (NPWT) is applied. (A) Surface deformation effect on film; note linear effects and concentric distortions. (We subsequently found that wrapping gauze around the end of the silicone drain improves the reliability of the NPWT technique when using drains.) Tissue deformation monitored within (B) periwound skin and (C) wound bed granulation tissue. The plane of the ultrasound is perpendicular to the surface striations on the film.