Characterization of relationship between optical microangiography OMAG signal and blood flow (Conference Presentation)

2017 ◽  
Author(s):  
Woo June Choi ◽  
Wan Qin ◽  
Chieh-Li Chen ◽  
Jingang Wang ◽  
Qinqin Zhang ◽  
...  
Keyword(s):  
Blood Flow ◽  
Optical Microangiography

Characterization of the postocclusive response of renal blood flow in the cat

1978 ◽  
Vol 235 (4) ◽  
pp. F286-F290 ◽  
Author(s):  
W. S. Spielman ◽  
H. Osswald
Keyword(s):  
Blood Flow ◽  
Angiotensin Ii ◽  
Renal Artery ◽  
Renal Blood Flow ◽  
Artery Occlusion ◽  
Renal Nerves ◽  
Vasoconstrictor Response ◽  
Renal Artery Occlusion ◽  
Chronic Denervation

In contrast to the postocclusive hyperemia of brain, heart, and skeletal muscle, the hemodynamic response of the kidney following renal artery occlusion is highly variable in that both hyperemia and ischemia have been reported. The present study evaluates the factors influencing the renal response to complete renal artery occlusion (5-60 s) in the anesthetized cat. Marked postocclusive vasoconstriction could only be domonstrated in meclofenamate-treated (10 mg/kg) cats. The delta% renal blood flow (RBF) (30-s occlusion) was 16 +/- 4 in controls and 54 +/- 4 after meclofenamate (n= 10; P less than 0.001). Chronic denervation of the kidney, alpha-adrenergic receptor blockade, or infusion of [Sar1, Ile8]angiotensin II(2 microgram/min per kg) did not affect the postocclusive reduction of RBF, indicating that the vasoconstriction was independent of renal nerves, catecholamines, and circulating angiotesin II. Adenosine injected into the renal artery of five cats caused a dose-dependent transient fall of RBF. A dose of 100 nmol adenosine reduced RBF by 44 +/- 6% whereas after meclofenamate only 1 nmol produced the same degree of vasoconstriction. In summary, this study demonstrates a marked potentiation of the postocclusive vasoconstrictor response and the vasoconstrictive action of adenosine by meclofenamate in the anesthetized animal. No evidence was obtained to support a role for the sympathetic nervous system or circulating angiotensin II in mediating the postocclusive vasoconstriction.

scholarly journals Characterization of the Skeletal Muscle Microvascular Blood Flow Response to Tissue CO 2 Perturbations using a Gas Exchange Chamber

2021 ◽  
Vol 35 (S1) ◽  
Author(s):  
Meaghan McCarthy ◽  
Meghan Kiley ◽  
Gaylene Russell McEvoy ◽  
Brenda Wells ◽  
Graham Fraser
Keyword(s):  
Skeletal Muscle ◽  
Blood Flow ◽  
Gas Exchange ◽  
Microvascular Blood Flow ◽  
Blood Flow Response ◽  
Flow Response

Characterization of neuronal damage by iomazenil binding and cerebral blood flow in an ischemic rat model

1998 ◽  
Vol 12 (5) ◽  
pp. 267-273 ◽  
Author(s):  
Hiroshi Toyama ◽  
Kaname Matsumura ◽  
Hiromichi Nakashima ◽  
Kan Takeda ◽  
Akira Takeuchi ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Rat Model ◽  
Neuronal Damage

Characterization of retinal blood flow in healthy subjects

2011 ◽  
Vol 89 (s248) ◽  
pp. 0-0 ◽  
Author(s):  
G FUCHSJAGER‐MAYRL ◽  
L SCHMETTERER
Keyword(s):  
Blood Flow ◽  
Healthy Subjects ◽  
Retinal Blood Flow

Structural Characterization of Glaucoma Patients with Low Ocular Blood Flow

2020 ◽  
Vol 45 (10) ◽  
pp. 1302-1308
Author(s):  
Kazuko Omodaka ◽  
Shunsuke Fujioka ◽  
Guangzhou An ◽  
Takuma Udagawa ◽  
Satoru Tsuda ◽  
...  
Keyword(s):  
Blood Flow ◽  
Structural Characterization ◽  
Ocular Blood Flow

scholarly journals Optical microangiography of retina and choroid and measurement of total retinal blood flow in mice

2012 ◽  
Vol 3 (11) ◽  
pp. 2976 ◽  
Author(s):  
Zhongwei Zhi ◽  
Xin Yin ◽  
Suzan Dziennis ◽  
Tomasz Wietecha ◽  
Kelly L. Hudkins ◽  
...  
Keyword(s):  
Blood Flow ◽  
Retinal Blood Flow ◽  
Optical Microangiography
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