Developing a surgical plane between the temporalis muscle and the dura is the most technically challenging step when performing cranioplasty for post-decompressive craniectomy defects. The authors report a simple technique to demarcate this surgical plane by laying a multi-slitted, microporous polyesterurethane (MPU) patch during decompressive craniectomy. Specifically, they tried to avoid creating potential spaces around the patch, which is the inherent drawback of published anti-adhesive techniques. In 21 patients undergoing decompressive craniectomy, and in 11 of them subsequently undergoing cranioplasty, there was no wound related complications. During cranioplasty, no epidural fluid collection was found; the patch could be separated from the temporalis muscle and the dura with blunt dissection leaving the muscle intact. They conclude that their epidural MPU patch technique is a safe technique, and appears useful to facilitate cranioplasty by helping the surgeon in developing the surgical plane between the temporalis muscle and the dura during cranioplasty.
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