Carotid wall as an isotropic mechanical system

Donor/Recipient Delta Age: A Possible Risk for Arterial Stenosis in Renal Transplantation

Different arterial wall properties can significantly increase the risk of blood turbulent fluxes leading to complications such as atherosclerosis. Since the mechanical properties of arterial vessels are influenced by age, we investigated, in a retrospective study, the effects on renal artery stenosis of an age difference >15 years between donor and recipient in a cohort of 164 patients undergoing renal transplantation between 1981 and 1991. The age difference between donor and recipient was ≤15 years in 87 patients (53.0%) (Group A) and >15 years in 77 patients (47.0%) (Group B, p = ns). None of the Group A patients developed an anastomotic arterial stenosis, whereas 8/77 Group B patients (10.4%) had an anastomotic arterial stenosis (p < 0.001). This study shows that an age difference >15 years is significantly linked to the risk of developing arterial stenosis after renal transplantation. Indeed, different wall properties can significantly increase the risk of generation of blood turbulent fluxes and involve, in the arterial vessels, the development of complications such as atherosclerosis.

ARTERIAL WALL MECHANICAL PROPERTIES AND KIDNEY GRAFT ARTERIAL STENOSIS

The connection of vascular segments with different mechanical properties increases the risk of generating blood turbulent fluxes, and involves the development of complications such as atherosclerosis in the arterial vessels. The mechanical properties of arterial vessel of two different subjects, the donor and the recipient, were analyzed. To experimentally validate the effects of the arterial wall mechanical properties on blood fluxes, 352 patients who received kidney transplantation were studied, concerning the development of renal artery atherosclerotic stenosis. An anastomothic arterial stenosis was observed in 92% of transplanted patients with donor/recipient age difference > 15 years, and in 5.7% of transplanted patients with donor/recipient age difference ≤ 15 years. In conclusion, it is useful to give more consideration to the patient's age difference in organ and vessel transplantations.