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Agreement between direct and indirect blood pressure measurements obtained from anesthetized Hispaniolan Amazon parrots

Mark J. Acierno MBA, DVM, DACVIM1, Anderson da Cunha DVM2, Julie Smith DVM, DACVA3, Thomas N. Tully Jr DVM, MS, DABVP4, David Sanchez-Migallon Guzman Lic en Vet5, Verna Serra BS6, and Mark A. Mitchell DVM, MS, PhD7
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  • 1 Department of Veterinary Clinical Science, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803
  • | 2 Department of Veterinary Clinical Science, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803
  • | 3 IAMS Pet Imaging Center, 328 Maple Ave E, Vienna, VA 22180
  • | 4 Department of Veterinary Clinical Science, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803
  • | 5 Department of Veterinary Clinical Science, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803
  • | 6 Department of Veterinary Clinical Science, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803
  • | 7 Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois, Urbana, IL 61802

Abstract

Objective—To determine the level of agreement between direct and indirect blood pressure measurements obtained from healthy Hispaniolan Amazon parrots (Amazona ventralis) anesthetized with isoflurane.

Design—Validation study.

Animals—16 healthy adult Hispaniolan Amazon parrots.

Procedures—Parrots were anesthetized, and a 26-gauge, 19-mm catheter was placed percutaneously in the superficial ulnar artery for direct measurement of systolic, mean, and diastolic arterial pressures. Indirect blood pressure measurements were obtained with a Doppler ultrasonic flow detector and an oscillometric unit. The Bland-Altman method was used to compare direct and indirect blood pressure values.

Results—There was substantial disagreement between direct systolic arterial blood pressure and indirect blood pressure measurements obtained with the Doppler detector from the wing (bias, 24 mm Hg; limits of agreement, −37 to 85 mm Hg) and from the leg (bias, 14 mm Hg; limits of agreement, −14 to 42 mm Hg). Attempts to obtain indirect blood pressure measurements with the oscillometric unit were unsuccessful.

Conclusions and Clinical Relevance—Results suggested that there was substantial disagreement between indirect blood pressure measurements obtained with a Doppler ultrasonic flow detector in anesthetized Hispaniolan Amazon parrots and directly measured systolic arterial blood pressure.

Abstract

Objective—To determine the level of agreement between direct and indirect blood pressure measurements obtained from healthy Hispaniolan Amazon parrots (Amazona ventralis) anesthetized with isoflurane.

Design—Validation study.

Animals—16 healthy adult Hispaniolan Amazon parrots.

Procedures—Parrots were anesthetized, and a 26-gauge, 19-mm catheter was placed percutaneously in the superficial ulnar artery for direct measurement of systolic, mean, and diastolic arterial pressures. Indirect blood pressure measurements were obtained with a Doppler ultrasonic flow detector and an oscillometric unit. The Bland-Altman method was used to compare direct and indirect blood pressure values.

Results—There was substantial disagreement between direct systolic arterial blood pressure and indirect blood pressure measurements obtained with the Doppler detector from the wing (bias, 24 mm Hg; limits of agreement, −37 to 85 mm Hg) and from the leg (bias, 14 mm Hg; limits of agreement, −14 to 42 mm Hg). Attempts to obtain indirect blood pressure measurements with the oscillometric unit were unsuccessful.

Conclusions and Clinical Relevance—Results suggested that there was substantial disagreement between indirect blood pressure measurements obtained with a Doppler ultrasonic flow detector in anesthetized Hispaniolan Amazon parrots and directly measured systolic arterial blood pressure.

Contributor Notes

Ms. Serra was a third-year veterinary student at the time of the study.

Address correspondence to Dr. Acierno.