Shikani A H
Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA.
Ear Nose Throat J. 1996 Aug;75(8):518-20, 522.
Hydroxylated polyvinyl acetal (PVAc) sponges are routinely used for control of bleeding following endoscopic sinus surgery. The physical characteristics of the Meroce sponges and the new Expandacell sponges were evaluated, including pore diameter, sponge size and rate of expansion. The Expandacell sponges were found to have a smaller pore diameter and to expand more slowly, giving the surgeon a bit more time for placement of the pack in the middle meatal cavity. Changing the physical characteristics of the PVAc sponges, such as making the pore size smaller, decreasing the thickness, coating with a laminated polyethylene surface or placing a fenestration in the center of the sponge, resulted in a significant decrease in the degree of pain associated with removal of the sponge.
羟基化聚乙烯醇缩醛（PVAc）海绵通常用于内窥镜鼻窦手术后的止血。对Meroce海绵和新型Expandacell海绵的物理特性进行了评估，包括孔径、海绵尺寸和膨胀率。发现Expandacell海绵的孔径较小且膨胀较慢，这给外科医生在中鼻道腔放置填塞物多留出了一点时间。改变PVAc海绵的物理特性，如减小孔径、减小厚度、用层压聚乙烯表面涂层或在海绵中心开孔，会显著降低与取出海绵相关的疼痛程度。
