scholarly journals Effects of Intravitreal Dexamethasone Implants on Retinal Oxygen Saturation, Vessel Diameter, and Retrobulbar Blood Flow Velocity in ME Secondary to RVO

2017 ◽  
Vol 58 (12) ◽  
pp. 5022 ◽  
Author(s):  
Katharina Eibenberger ◽  
Leopold Schmetterer ◽  
Sandra Rezar-Dreindl ◽  
Piotr Wozniak ◽  
Reinhard Told ◽  
...  
Keyword(s):  
Blood Flow ◽  
Oxygen Saturation ◽  
Flow Velocity ◽  
Blood Flow Velocity ◽  
Vessel Diameter ◽  
Retrobulbar Blood Flow ◽  
Intravitreal Dexamethasone

Hemodynamics, cerebral circulation, and oxygen saturation in Cheyne-Stokes respiration

1997 ◽  
Vol 83 (4) ◽  
pp. 1184-1191 ◽  
Author(s):  
Karl A. Franklin ◽  
Erik Sandström ◽  
Göran Johansson ◽  
Eva M. Bålfors
Keyword(s):  
Blood Pressure ◽  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Oxygen Saturation ◽  
Flow Velocity ◽  
Blood Flow Velocity ◽  
Cerebral Circulation ◽  
Cerebral Blood Flow Velocity ◽  
Blood Gases ◽  
Oxygen Administration

Franklin, Karl A., Erik Sandström, Göran Johansson, and Eva M. Bålfors. Hemodynamics, cerebral circulation, and oxygen saturation in Cheyne-Stokes respiration. J. Appl. Physiol. 83(4): 1184–1191, 1997.—Because cardiovascular disorders and stroke may induce Cheyne-Stokes respiration, our purpose was to study the interaction among cerebral activity, cerebral circulation, blood pressure, and blood gases during Cheyne-Stokes respiration. Ten patients with heart failure or a previous stroke were investigated during Cheyne-Stokes respiration with recordings of daytime polysomnography, cerebral blood flow velocity, intra-arterial blood pressure, and intra-arterial oxygen saturation with and without oxygen administration. There were simultaneous changes in wakefulness, cerebral blood flow velocity, and respiration with accompanying changes in blood pressure and heart rate ∼10 s later. Cerebral blood flow velocity, blood pressure, and heart rate had a minimum occurrence in apnea and a maximum occurrence during hyperpnea. The apnea-induced oxygen desaturations were diminished during oxygen administration, but the hemodynamic alterations persisted. Oxygen desaturations were more severe and occurred earlier according to intra-arterial measurements than with finger oximetry. It is not possible to explain Cheyne-Stokes respiration by alterations in blood gases and circulatory time alone. Cheyne-Stokes respiration may be characterized as a state of phase-linked cyclic changes in cerebral, respiratory, and cardiovascular functions probably generated by variations in central nervous activity.

Reproducibility of retrobulbar blood flow velocity measurements in normal subjects using two different CDI devices

2015 ◽  
Vol 120 (8) ◽  
pp. 737-744 ◽  
Author(s):  
Carolina Dellafiore ◽  
Massimiliano Lava ◽  
Alice Chandra Verticchio Vercellin ◽  
Carlo Alberto Cutolo ◽  
Carmine Tinelli ◽  
...  
Keyword(s):  
Blood Flow ◽  
Flow Velocity ◽  
Blood Flow Velocity ◽  
Normal Subjects ◽  
Velocity Measurements ◽  
Retrobulbar Blood Flow

Effect of body position and graduated compression stocking length on femoral venous blood flow velocity

2003 ◽  
Vol 18 (4) ◽  
pp. 198-202
Author(s):  
A Limpus ◽  
W P Chaboyer ◽  
C Purcell ◽  
P J Schluter ◽  
H Gibbs ◽  
...  
Keyword(s):  
Blood Flow ◽  
Flow Velocity ◽  
Blood Flow Velocity ◽  
Body Position ◽  
Venous Blood ◽  
Vessel Diameter ◽  
Compression Stocking ◽  
Venous Blood Flow ◽  
Significant Difference ◽  
Three Body

Objectives: To measure the effect of graduated compression stocking (GCS) length and body position on peak femoral venous blood flow velocity (PVV) and vessel diameter (VD). Methods: Twenty healthy adult volunteers had PVV and VD measured, using colour Doppler ultrasound, at baseline in three body positions. Knee- or thigh-length GCS were assigned randomly.Arandom sequence of the three positions was used to measure PVV and VD. The procedure was repeated, after a two-hour washout period, using the other length GCS. Results: There was no significant difference in the mean change of PVV ( P =0.74) or VD ( P =0.54) measurements from the baseline between thigh- and knee-length GCS. However, significant mean changes in PVV ( P =0.02) and VD ( P <0.001) measurements were observed for the three body positions, after adjusting for baseline values. Conclusions: In healthy volunteers, thigh- and knee-length GCS do not have an effect on PVV or VD, and body position affects PVV significantly, with or without GCS.

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