Fig. 1.

Assessment of structural and mechanical properties of the arterioles. A: with the use of a PS-20 pressure servo controller with a peristaltic pump, intraluminal pressure was increased from 3 to 180 mmHg in 20-mmHg increments to assess passive structure (representative images are presented at an intraluminal pressure of 80 mmHg). B: premeasurement settings of the scan lines on the video dimension analyzer were set to identify the lumen and outer edge of the wall. All parameters measured zero while scan lines were open. C: scan lines were closed to provide the lumen diameter and left and right wall thickness. Scan lines were edited to appear darker for visual clarity.