scholarly journals OC22.06: Quantitative carotid volume blood flow measurements using PW-Doppler vs. transit-time perivascular flowmetry in ovine twin fetuses

2011 ◽  
Vol 38 (S1) ◽  
pp. 42-42
Author(s):  
S. Gruessner ◽  
H. Hertel ◽  
P. Hillemanns ◽  
C. Peter
Keyword(s):  
Blood Flow ◽  
Transit Time ◽  
Flow Measurements ◽  
Volume Blood ◽  
Volume Blood Flow ◽  
Blood Flow Measurements

Reproducibility of ultrasonic fetal volume blood flow measurements

1998 ◽  
Vol 18 (5) ◽  
pp. 479-485 ◽  
Author(s):  
J. Brodszki ◽  
H. M. Gardiner ◽  
A. Eriksson ◽  
H. Stale ◽  
K. Maršál
Keyword(s):  
Blood Flow ◽  
Flow Measurements ◽  
Volume Blood ◽  
Volume Blood Flow ◽  
Blood Flow Measurements

Validation of Volume Blood Flow Measurements Using Three-Dimensional Distance-Concentration Functions Derived from Digital X-Ray Angiograms

1994 ◽  
Vol 29 (4) ◽  
pp. 434-442 ◽  
Author(s):  
DAVID J. HAWKES ◽  
ALEXANDER M. SEIFALIAN ◽  
ALAN C.F. COLCHESTER ◽  
NAJMA IQBAL ◽  
CHARLES R. HARDINGHAM ◽  
...  
Keyword(s):  
Blood Flow ◽  
Three Dimensional ◽  
Flow Measurements ◽  
X Ray ◽  
Concentration Functions ◽  
Volume Blood ◽  
Volume Blood Flow ◽  
Blood Flow Measurements

scholarly journals The Effects of Changes in PaCO2Cerebral Blood Volume, Blood Flow, and Vascular Mean Transit Time

Stroke ◽  
1974 ◽  
Vol 5 (5) ◽  
pp. 630-639 ◽  
Author(s):  
ROBERT L. GRUBB ◽  
MARCUS E. RAICHLE ◽  
JOHN O. EICHLING ◽  
MICHEL M. TER-POGOSSIAN
Keyword(s):  
Blood Flow ◽  
Blood Volume ◽  
Transit Time ◽  
Mean Transit Time ◽  
Volume Blood ◽  
Volume Blood Flow

scholarly journals SP584USEFULNESS OF DIRECT BLOOD FLOW MEASUREMENTS USING TRANSIT-TIME FLOWMETRY DURING THE AVF OPERATION FOR EARLY AVF FAILURE

2019 ◽  
Vol 34 (Supplement_1) ◽  
Author(s):  
Masato Ohsawa ◽  
Tetsu Ohnuma ◽  
Ryu Kobayashi ◽  
Kazushi Uneda ◽  
Tomohiko Kanaoka ◽  
...  
Keyword(s):  
Blood Flow ◽  
Transit Time ◽  
Flow Measurements ◽  
Transit Time Flowmetry ◽  
Blood Flow Measurements

Torsion is Tolerated in Arterial End to Venous Side Anastomoses in the Rat Model

2020 ◽  
Vol 36 (07) ◽  
pp. 501-506 ◽  
Author(s):  
Maxwell A. Levi ◽  
Amro A. Harb ◽  
Celine F. Nicolas ◽  
John J. Corvi ◽  
Aki Kozato ◽  
...  
Keyword(s):  
Blood Flow ◽  
Transit Time ◽  
Femoral Artery ◽  
Rat Model ◽  
Clinical Setting ◽  
Microvascular Surgery ◽  
Sprague Dawley ◽  
Flow Measurements ◽  
Negative Effect ◽  
Blood Flow Measurements

Abstract Background End-to-side (ETS) anastomoses are necessary for many procedures in microvascular surgery, such as free flap transfers. In training courses that use the rat model, the arterial end to venous side (AEVS) anastomosis is a common training exercise for ETS anastomoses. Surgeons-in-training often inadvertently twist the artery when completing the AEVS anastomosis; however, in the clinical setting, torsion is a reported risk factor for ETS anastomosis failure. The purpose of this study was to determine if torsion in an AEVS anastomosis would have a negative effect on patency in the rat model, accurately simulating the clinical scenario. Methods All AEVS anastomoses were completed in 15 Sprague–Dawley rats divided into three torsion cohorts: 0, 90, and 180 degrees. Torsion was created in the AEVS anastomosis by mismatching the first two sutures placed between the free femoral artery end and the venotomy. Patency was verified at 0, 2, and 4 hours postoperation via the oxygenated–deoxygenated test and transit-time ultrasound blood flow measurements. Results All AEVS anastomoses were patent 0, 2, and 4 hours postoperation according to both the oxygenated–deoxygenated test and transit-time ultrasound blood flow measurements. For the average blood flow measurements at 4 hours postoperation, the proximal measurements for 0, 90, and 180 degrees were −34.3, −18.7, and −13.8 mL/min respectively, and the distal measurements were 4.48, 3.46, and 2.90 mL/min, respectively. Conclusion Torsion of 180 degrees does not affect early AEVS anastomosis patency in the rat model. This contrasts with the clinical setting, where torsion is reported to cause ETS anastomosis failure. Since AEVS anastomosis torsion is often difficult to appreciate visually, we suggested that microvascular surgery training instructors include a method to both detect and prevent AEVS anastomosis torsion, such as by marking the free femoral artery end with a marking pen or suture before beginning the anastomosis.

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