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Results for “BLOOD VESSEL PROSTHESIS”

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PubMed1997

[In vitro evaluation of blood vessel prosthesis dilatation--Dacron and PTFE--a new measuring technique].

Dilatation is the most significant complication of prosthetic vascular grafts. It is suspected to be a nidus of other graft complications. There have been a few studies on in-vitro-dilatation of the prosthetic vascular grafts. This is due to the lack of an effective and simple method to measure the transverse dilatation of the graft. We developed a new simple, reliable and cost-effective technique to evaluate the in-vitro-dilatation of prosthetic vascular grafts. The dilatation behavior of two different types of grafts (dacron and PTFE) was observed and compared under static pressure between 0 and 300 mmHg. The in-vitro- dilatations of dacron and PTFE grafts were 6.9% and 8.4% respectively. Interestingly, the dilatation rate for PTFE vascular grafts is higher than the indicated rate in the literature.

Blood Vessel Prosthesis↗

PubMed1996

[Morphology of abdominal aortic aneurysms with reference to endovascular blood vessel prosthesis].

The purpose of this report was to describe the frequency and morphology of infrarenal aortic aneurysms suitable for endovascular tube graft repair. Preoperative abdominal CT scans of 89 patients undergoing open tube graft repair were analyzed retrospectively by measurements of lengths and diameters of the aneurysms. The cases were divided into 3 separate groups: most suitable aneurysms with neck and cuff in 10% (9/89), aneurysms (59%, 52/89) with either a neck (92%) or a cuff (8%), and finally aneurysms without a neck or a cuff (31%, 28/89). The anatomically suitable aneurysms have a neck of 31 +/- 19 mm in length and 23 +/- 4 mm in diameter, a cuff of 17 +/- 6 mm in length and 25 +/- 6 mm in diameter. The aneurysms have a nearly saccular nature with a "saccular index" of 0.81 +/- 0.17, p = 0.009. It appears that 10% of aneurysms restricted to the infrarenal aortic segment fulfill all criterias for endovascular straight tube graft repair.

Aged↗

PubMed1996

[Urologic complications after implantation of aortofemoral blood vessel prosthesis].

After implantation of aorto-femoral grafts, primary ureteral lesions and secondary ureteral obstructions are the most important urological complications. Surgical repair carried out as quickly as possible, including reanastomosis without tension and covering with a peritoneal patch or omentum interposition, seems the best means of preventing secondary complications. In the case of secondary obstructions, the interval between implantation of the graft and the diagnosis of obstruction has to be considered. A wait-and-see strategy is justified in the case of early obstruction without symptoms during the 1st year because of the high rate of spontaneous remission. Obstructions that appear more than 1 year after operation or symptomatic obstructions have to be treated immediately (i.e. duodenojejunal stent, percutaneous nephrostomy). If repeated obstructions after removal of stents or nephrostomies are noted, surgical repair seems to be indicated. Stents or nephrostomies as definitive procedures are appropriate only in patients in whom surgical revision is not possible or desirable.

Aged↗

PubMed1962