Comparison of invasive and oscillometric blood pressure measurement techniques in anesthetized sheep, goats, and cattle.
OBJECTIVE
To determine the level of agreement between an oscillometric (O-NIBP) and an invasive method (IBP) of monitoring arterial blood pressure (ABP) in anesthetized sheep, goats, and cattle.


METHODS
Prospective clinical study.


METHODS
Twenty sheep and goats, 20 cattle weighing < 150 kg body weight, and 20 cattle weighing 150 kg body weight.


METHODS
Animals were anesthetized and systolic ABP (SABP), mean ABP (MABP), and diastolic ABP (DABP) were measured using IBP and O-NIBP. Differences between IBP and O-NIBP, and 95% limits of agreement (LOA) between SABP, MABP, and DABP values were assessed by the Bland-Altman method.


RESULTS
Mean difference ± standard deviation (range) between SABP, DABP, and MABP measurements in sheep and goats was 0 ± 16 (-57 to 38) mmHg, 13 ± 16 (-37 to 70) mmHg, and 8 ± 13 (-34 to 54) mmHg, respectively. Mean difference between SABP, DABP, and MABP measurements in small cattle was 0 ± 19 (-37 to 37) mmHg, 6 ± 18 (-77 to 48) mmHg, and 4 ± 16 (-73 to 48) mmHg, respectively. Mean difference between SABP, DABP, and MABP measurements in large cattle was -18 ± 32 (-107 to 71) mmHg, 7 ± 29 (-112 to 63) mmHg, and -5 ± 28 (-110 to 60) mmHg, respectively. The 95% LOAs for SABP, DABP, and MABP were -31 to +31, -19 to +44, and -19 to +34 mmHg, respectively in sheep and goats; were -37 to +37, -19 to +44, and -19 to +34 mmHg, respectively in small cattle; and were -81 to +45, -50 to +63, and -59 to +50 mmHg, respectively in large cattle.


CONCLUSIONS
Agreement was poor between O-NIBP and IBP monitoring techniques.


CONCLUSIONS
Arterial BP should be monitored in anesthetized sheep, goats, and cattle using IBP.
Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA.
Turi K
TK
Aarnes
John Ae
JA
Hubbell
Phillip
P
Lerche
Richard M
RM
Bednarski
D000758:Anesthesia / Q000662:veterinary*; D000818:Animals; D015924:Blood Pressure Monitors / Q000662:veterinary*; D002417:Cattle / Q000502:physiology*; D006041:Goats / Q000502:physiology*; D012756:Sheep / Q000502:physiology*
anesthesia; arterial blood pressure; cattle; goat; non-invasive blood pressure; sheep