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Accuracy of a Species and Cuff Site Optimized
Oscillometric BP Monitor in Cats
William Muir DVM, PhD, ACVA, ACVECC
The Ohio State University, Columbus, Ohio 43210
petMAP is a new device for the indirect measurement of BP in dogs
and cats using the oscillometric technique. The petMAP’s small size
makes it uniquely versatile providing data that has been
individually optimized for both dogs and cats, and cuff site
(forelimb, tail, and hind limb). petMAP was tested in lightly
anesthetized cats (N=10) by comparing cuff readings at all three
locations to simultaneously recorded intra-arterial pressure
measurements. The mean and standard deviations of the differences
between the two methods for systolic (SAP), mean (MAP), and
diastolic (DAP)
arterial pressure were analyzed and displayed as Bland-Altman and
correlation plots. The best agreement was achieved on the forelimb.
The mean and standard deviations in mmHg for the differences in SAP,
MAP, and DAP were, respectively,
-0.4 +/-11.2, -1.5 +/-5.2, -2.1 +/-6.6 (a negative mean value is
underestimation of arterial pressure by the petMAP compared to
intra-arterial readings). petMAP results compared favorably with: 1)
the results reported for the Cardell oscillometric blood pressure
monitor in anesthetized cats (N=6) on the clipped forelimb (BP
ranges combined):
-11.6+/-7.5, -0.9 +/-6.2 , -0.1 +/-4.1 [Ref 1], 2) with the Dinamap
oscillometric blood pressure monitor on awake cats (N=11) tail (best
site, sign of mean reversed for consistency): -9.5 +/-17.8, -21.1
+/-13.1, -17.3 +/-10.8 [Ref 2], and
3) the Doppler (N=11) ultrasonic blood pressure monitor on the
metatarsus (best site, sign of mean reversed for consistency,
systolic only): - 9.4 +/-14.9 [Ref 2]. Our data suggests that the
petMAP offers improved
accuracy of systolic BP measurement in cats and provides comparable
or better accuracy for MAP and diastolic pressures as compared to
other popular oscillometric and Doppler devices.
1. Pederson, et al, J Am Vet Med Assoc 2002; 221:646-650
2. Bins, et al, J Vet Int Med 1995; 9:405-414
Accuracy of a Species and Cuff Site Optimized
Oscillometric BP Monitor in Dogs
William Muir DVM, PhD, ACVA,
ACVECC
The Ohio State University, Columbus, Ohio 43210
petMAP is a new device for the indirect measurement of BP in dogs
and cats using the oscillometric technique. The petMAP’s small size
makes it uniquely versatile providing data that has been individually
optimized for both dogs and cats, and cuff site (forelimb, tail, and
hind limb). petMAP was tested in lightly anesthetized dogs (N=10) by
comparing cuff readings at all three locations to simultaneously
recorded intra-arterial pressure measurements. The mean and standard
deviations of the differences between the two methods for systolic
(SAP), mean (MAP), and diastolic (DAP) arterial pressure were analyzed
and displayed as Bland-Altman and correlation plots. The best agreement
was achieved on the tail. The mean and standard deviations in mmHg for
the differences in SAP, MAP, and DAP were, respectively,
-1.64 +/-11.9, -6.16 +/-8.2, -6.1 +/-7.7 (a negative mean value is
underestimation of arterial pressure by the petMAP
compared to intra-arterial readings). petMAP results compared
favorably with: 1) the results reported for the Cardell oscillometric
blood pressure monitor in anesthetized dogs (N=6) metatarsus (best site,
sign of mean reversed for consistency): -7 +/-11, -11 +/-6, -13 +/-6
[Ref 1], 2) with the Dinamap oscillometric blood pressure monitor on
awake dogs (N=12) tail (best site, sign of mean reversed for
consistency): -20.0 +/-18.2, -10.80 +/- 5.6, -5.3
+/-15.3 [Ref 2], and 3) the Doppler (N=12) ultrasonic blood pressure
monitor on the metatarsus (best site, sign of mean reversed for
consistency, systolic only): -11.6 +/-19.7 [Ref 2]. Our data
suggests that the petMAP offers improved accuracy of BP measurement
in dogs compared to other popular oscillometric and Doppler devices.
1. Sawyer, et al, Veterinary Anesthesia and Analgesia, 2004;
31:27-39.
2. Haberman, et al, Can J Vet Res , 2006; 70:211-217.
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