Blood flow and venous distensibility in the upper and lower extremities of newborn infants.
The electrocapacitance plethysmograph was utilized to measure peripheral blood flow and venous distensibility in 17 newborn infants and 20 adults. Measurements were made in the upper and lower extremities in each subject under identical environmental conditions. Blood flow in the forearm and calf were found to be significantly higher in infants than adults. In infants there were no significant differences in the blood flow between the upper and lower extremities. In contrast, in the adults, the blood flow was significantly higher in the upper than in the lower extremities. Similarly, venous distensibility was observed to be higher in infants than in adults. While no significant differences were observed in the venous distensibility between the upper and lower extremities in infants, the venous distensibility was found to be higher in the forearm than in the leg in adults.
D000328:Adult; D000367:Age Factors; D000368:Aged; D001132:Arm / Q000098:blood supply*; D001775:Blood Circulation; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007866:Leg / Q000098:blood supply*; D008297:Male; D008875:Middle Aged; D010991:Plethysmography; D012039:Regional Blood Flow; D014680:Veins / Q000502:physiology*; D014690:Venous Pressure