Validation of a new transit time ultrasound flowmeter for measuring blood flow in colonic mesenteric arteries.
OBJECTIVE
To validate a transit time ultrasound flowmeter (CardioMed CM 4000) for measuring blood flow in isolated colonic mesenteric arteries.


METHODS
Experimental and clinical study.


METHODS
Teaching hospital, Denmark. ANIMALS AND SUBJECTS: One female pig, and 6 patients being operated on for carcinoma of the sigmoid colon and rectum.


METHODS
Volume blood flow measured by Cardiomed CM 4000 and pump withdrawal flow recordings.


METHODS
Correlation between the two methods.


RESULTS
There was good agreement between transit time flow recordings and pump withdrawal flow recordings (correlation coefficient of 1.0). Of the differences between the two methods, 95% were between -0.16 ml min(-1) and 1.29 ml min(-1), mean 0.57 ml min(-1), or (in percentages) 105, 95% lying between 97-115. There was also good reproducibility in transit time flow recordings, the mean difference between repeated measurements being 0.06 ml min(-1), 95% lying between -0.66 ml min(-1) and 0.78 ml min(-1).


CONCLUSIONS
Ultrasound transit time flow recordings gave precise measurements of blood flow in isolated colonic mesenteric arteries.
Department of Gastrointestinal Surgery, Aarhus University Hospital, Denmark.
F V
FV
Mortensen
J S
JS
Rasmussen
O
O
Viborg
S
S
Laurberg
E M
EM
Pedersen
D000368:Aged; D000818:Animals; D002277:Carcinoma / Q000503:physiopathology; D003106:Colon / Q000098:blood supply*; D004867:Equipment Design; D005260:Female; D006801:Humans; D008297:Male; D008638:Mesenteric Arteries / Q000000981:diagnostic imaging* / Q000502:physiology; D008875:Middle Aged; D012004:Rectal Neoplasms / Q000503:physiopathology; D012212:Rheology / Q000295:instrumentation* / Q000379:methods / Q000706:statistics & numerical data; D012811:Sigmoid Neoplasms / Q000503:physiopathology; D013152:Splanchnic Circulation; D013552:Swine; D013997:Time Factors; D014463:Ultrasonography