Skin blood flow during acute stress in elderly essential hypertensive patients -A laser doppler flowmetry study-

1998 ◽  
Vol 5 ◽  
pp. 224
Author(s):  
H. Mitsubayashi ◽  
M. Watanabe ◽  
H. Kawamura ◽  
T. Inoue ◽  
T. Suzuki ◽  
...  
Keyword(s):  
Blood Flow ◽  
Laser Doppler Flowmetry ◽  
Skin Blood Flow ◽  
Acute Stress ◽  
Laser Doppler ◽  
Doppler Flowmetry ◽  
Hypertensive Patients

Skin blood flow responses during sleep by laser Doppler flowmetry

1999 ◽  
Vol 53 (2) ◽  
pp. 117-119 ◽  
Author(s):  
Yasufumi Shiihara ◽  
Akihisa Hirota ◽  
Yosinari Kobayashi ◽  
Toshiyuki Nakamiya ◽  
Masahisa Kodama
Keyword(s):  
Blood Flow ◽  
Laser Doppler Flowmetry ◽  
Skin Blood Flow ◽  
Laser Doppler ◽  
Doppler Flowmetry

Evaluation of stellate ganglion block on auricular skin blood flow by laser-doppler flowmetry

1995 ◽  
Vol 56 (1-2) ◽  
pp. 135-136
Author(s):  
Kenji Imai ◽  
Keisou Ishimaru ◽  
Masahiro Iwa ◽  
Toshikatsu Kitade ◽  
Sadayuki Sasaki ◽  
...  
Keyword(s):  
Blood Flow ◽  
Laser Doppler Flowmetry ◽  
Skin Blood Flow ◽  
Stellate Ganglion ◽  
Stellate Ganglion Block ◽  
Laser Doppler ◽  
Ganglion Block ◽  
Doppler Flowmetry

Cutaneous blood flow in the pigeon Columba livia: its possible relevance to cutaneous water evaporation

2002 ◽  
Vol 205 (17) ◽  
pp. 2627-2636 ◽  
Author(s):  
E. Ophir ◽  
Y. Arieli ◽  
J. Marder ◽  
M. Horowitz
Keyword(s):  
Blood Flow ◽  
Laser Doppler Flowmetry ◽  
Skin Blood Flow ◽  
Heat Exposure ◽  
Columba Livia ◽  
Laser Doppler ◽  
Arterial Blood Flow ◽  
Water Evaporation ◽  
Venous Blood Flow ◽  
Doppler Flowmetry

SUMMARY The heat-acclimated rock pigeon is thought to use cutaneous water evaporation (CWE) as the `preferred' route for heat dissipation, and this mechanism is controlled by adrenergic signaling. In the present study, we tested the hypothesis that adjustments in skin blood flow are a crucial component of this adaptation. Skin blood flow was measured by laser Doppler flowmetry and by ultrasonic flowmetry in heat-acclimated (HAc) and non-acclimated (NAc) pigeons. Skin blood flow, CWE and rectal and skin temperatures were measured under heat exposure(Ta=50°C) or following propranolol (1.3 mg kg-1) or clonidine (80 μg kg-1) administration. Using laser Doppler flowmetry, we found a significant increase (1.3-fold) in skin blood flow in the dorsal skin of HAc pigeons following propanolol administration. In contrast, a significant decrease (0.7-fold) was observed in NAc birds. Injection of clonidine resulted in a significant decrease in skin blood flow in both HAc and NAc pigeons (0.4- and 0.5-fold, respectively). Heat exposure increased blood perfusion in both groups (2.5- and 1.8-fold,respectively). Using ultrasonic flowmetry, we showed that both propanolol and clonidine increase the arterial blood flow (Qa) in HAc pigeons, while venous blood flow (Qv) decreases. In contrast, no significant changes were found in NAc pigeons. As shown by the effect of clonidine, augmentation of skin blood flow is not a prerequisite for CWE, but normally coincides with a greater difference in arterial—venous pressure. Possible regulatory mechanisms are discussed.

Sign in / Sign up

Export Citation Format

Share Document