title: [Changes with age in the valvular apparatus of the superficial and deep veins of the leg].
abstract: The morphological validity of valves in the superficial and deep veins of the leg is investigated in 100 lower limbs, belonging to 50 individuals, distributed into three groups according to age: 0-25, 25-60 and above 60 years. It is established that parallel to aging, the number of fully developed valves is reduced whilst that of the partial valves is increased, with highest intensity of the process being recorded during the period 25-60 years. In subjects older than 60 years, the number of partial valves represents from 1/5-1/10 of their total quantity, whereas in the superficial veins their number is from 1.5 to 2 times higher than in the deep ones. The data obtained show that mainly valves disappear which have undergone variation from the bicuspid valvular form and those with lesser functional loading as well.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007866:Leg / Q000098:blood supply*; D008875:Middle Aged; D014680:Veins / Q000033:anatomy & histology*
vernacular_title: Vuzrastovi izmeneniia na klapniia aparat v povurkhnostnite i dulbokite veni na podbedritsata