Utoh J, Goto H, Obayashi H, Hirata T, Miyauchi Y
First Department of Surgery, Kumamoto University School of Medicine, Japan.
J Cardiovasc Surg (Torino). 1996 Aug;37(4):343-4.
Postoperative dilation of gelatin-sealed knitted dacron prostheses (Gelseal, Vascutek, Scotland UK) was studied.
Prospective study.
Institutional clinical research.
Ten patients who underwent aortic repair for abdominal aortic aneurysm (AAA) with the Gelseal graft were studied (Group A). Prior to and immediately following the implantation, the diameter of Gelseal was measured with slide calipers. The external diameter was examined by CT scan 4 weeks following the surgery. Another 10 patients, who had undergone AAA repair with the Gelseal graft more than 2 years earlier (Group B), also were examined by CT scan. Early and late dilation of Gelseal was estimated and the data from the two groups were compared.
In Group A, the preimplantation external diameter was 22.6 +/- 2.3 mm while the mean package size (PS) used was 18.7 +/- 2.1 mm prior to implantation. Just after the implantation, the external diameter changed to 22.7 +/- 2.4 mm. Four weeks later, it averaged 24.0 +/- 2.2 mm. In Group B, the PS averaged 19.2 +/- 2.0 mm, while the external diameter measured by CT scan averaged 27.8 +/- 3.4 mm at a mean of 31.3 months following the surgery.
Prior to implantation, the external diameter was 1.21 times that of the PS. Following implantation, it was 1.21 times (immediately after), 1.28 times (4 weeks later), and 1.45 times (31.3 months later) of the PS.
At an average of 31.3 months following implantation, the external diameter was 45% larger than the PS. Considering that the external diameter was 21% larger than the PS even prior to implantation, the actual dilation rate is estimated as 24% of the PS in the late postoperative period.
研究明胶密封针织涤纶人工血管（Gelseal，Vascutek，英国苏格兰）术后的扩张情况。
前瞻性研究。
机构临床研究。
对10例使用Gelseal移植物进行腹主动脉瘤（AAA）主动脉修复的患者进行研究（A组）。在植入前及植入后立即用游标卡尺测量Gelseal的直径。术后4周通过CT扫描检查外径。另外10例在2年多以前使用Gelseal移植物进行AAA修复的患者（B组）也接受了CT扫描检查。评估Gelseal的早期和晚期扩张情况，并比较两组的数据。
A组中，植入前外径为22.6±2.3mm，植入前使用的平均包装尺寸（PS）为18.7±2.1mm。植入后立即，外径变为22.7±2.4mm。4周后，平均为24.0±2.2mm。B组中，PS平均为19.2±2.0mm，术后平均31.3个月时CT扫描测量的外径平均为27.8±3.4mm。
植入前，外径是PS的1.21倍。植入后，分别为PS的1.21倍（植入后立即）、1.28倍（4周后）和1.45倍（31.3个月后）。
植入后平均31.3个月时，外径比PS大45%。考虑到植入前外径就比PS大21%，估计术后晚期实际扩张率为PS的24%。
