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<br>Objective: The purpose of this research was to assess the pelvic circulation throughout endovascular abdominal aortic aneurysm repair (EVAR) with a brand new monitoring system measuring penile and buttock blood stream. Methods: We measured penile brachial pressure index (PBI) during EVAR by pulse-volume-plethysmography (type PWV/ABItrade mark). We also measured bilateral gluteal tissue oxygen metabolism with close to-infrared spectroscopy to provide a gluteal tissue oxygenation index (TOI). Twenty-two males who underwent aortouni-iliac stentgraft with crossover bypass for exclusion of abdominal aortic aneurysm have been studied. Twelve patients underwent aorto-uni-widespread iliac artery stentgraft (CIA) and ten underwent aorto-uni-exterior iliac artery stentgraft (EIA). Results: In all patients, there was an instantaneous discount in PBI in the course of the EVAR procedure. After revascularization of the ipsilateral limb of the stent graft, the recovery of PBI was considerably less in EIA group. After the completion of crossover bypass, PBI in both teams recovered to the baseline values. In both teams there was a bilateral discount in gluteal TOI during malperfusion of the internal iliac artery. After revascularization of ipsilateral limb of the stent graft, the ipsilateral TOI recovered to the baseline level in CIA patients, but restoration was incomplete in EIA patients. In distinction, contra-lateral TOI remained low in each groups after revascularization of ipsilateral limb of the stent graft. Only after completion of crossover bypass did the contra-lateral TOI recover to baseline stage in each teams. Conclusions: Both TOI at the buttocks and PBI are a delicate reflection of pelvic haemodynamics. Penile blood stream and bilateral gluteal blood circulation are supplied via different circulations and each needs to be monitored for full evaluation of the pelvic circulation.<br>
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