Electric impedance cuff for the indirect measurement of blood pressure and volume elastic modulus in human limb and finger arteries

1989 ◽  
Vol 27 (5) ◽  
pp. 477-483 ◽  
Author(s):  
H. Shimazu ◽  
A. Kawarada ◽  
H. Ito ◽  
K. Yamakoshi
Keyword(s):  
Blood Pressure ◽  
Elastic Modulus ◽  
Indirect Measurement ◽  
Electric Impedance ◽  
Volume Elastic Modulus ◽  
Human Limb

Indirect Measurement of Arterial Pressure, Blood Flow and Volume Elastic Modulus in Human Fingers Using Electric Impedance-Cuff

1991 ◽  
pp. 483-493
Author(s):  
Hiroshi Ito ◽  
Hideaki Shimazu ◽  
Atsushi Kawarada ◽  
Hiroko Kobayashi ◽  
Jun Masuda ◽  
...  
Keyword(s):  
Blood Flow ◽  
Elastic Modulus ◽  
Arterial Pressure ◽  
Indirect Measurement ◽  
Electric Impedance ◽  
Volume Elastic Modulus

Normal Range of Volume Elastic Modulus in Finger Arteries Determined Indirectly by Electric Impedance-Cuff

1990 ◽  
pp. 433-441
Author(s):  
Jun Masuda ◽  
Hiroshi Ito ◽  
Hideaki Shimazu ◽  
Atsushi Kawarada ◽  
Hiroko Kobayashi ◽  
...  
Keyword(s):  
Elastic Modulus ◽  
Electric Impedance ◽  
Normal Range ◽  
Volume Elastic Modulus

Criteria in the choice of an occluding cuff for the indirect measurement of blood pressure

1977 ◽  
Vol 15 (1) ◽  
pp. 2-10 ◽  
Author(s):  
Harold Alexander ◽  
Myron L. Cohen ◽  
Leonard Steinfeld
Keyword(s):  
Blood Pressure ◽  
Indirect Measurement

Mechanical and Dimensional Adaptation of Rat Aorta to Hypertension

1994 ◽  
Vol 116 (3) ◽  
pp. 278-283 ◽  
Author(s):  
T. Matsumoto ◽  
K. Hayashi
Keyword(s):  
Blood Pressure ◽  
Elastic Modulus ◽  
Wall Stress ◽  
Dimensional Change ◽  
Biological Tissues ◽  
Rat Aorta ◽  
Mechanical Adaptation ◽  
Male Wistar Rats ◽  
Load Effects

To investigate mechanisms of the mechanical adaptation of soft biological tissues to load, effects of hypertension on the mechanical properties and wall dimensions of thoracic aortas were studied in rats. Goldblatt hypertension was induced in male Wistar rats aged 8 to 9 weeks by constricting their left renal arteries. Two, 4, 8, or 16 weeks after the operation, thoracic aortas were excised and used to determine static pressure-diameter relations and wall dimensions. Wall thickness correlated significantly with the systolic blood pressure before sacrifice, Psys, at each period. The aortic hoop stress became almost constant at all Psys 2 weeks after the operation. On the other hand, the stress calculated for 100 and 200 mmHg correlated negatively with Psys. The incremental elastic modulus of the wall at Psys had a significant correlation with Psys having a positive slope at each period, although the correlation disappeared at 16 weeks after the operation. These results imply that: 1) thickness of the aortic wall increases very rapidly in response to hypertension; 2) wall stress developed by the in-situ blood pressure is kept constant at a normal level irrespective of hypertension; 3) elastic modulus of the wall of the hypertensive rats at the in-situ blood pressure becomes equal to the normal value after relatively long period of time; 4) in response to the alteration of the applied force, dimensional change appears much earlier than the change in the elastic properties.

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