Related Experiment Video
Updated: Jan 13, 2026
Continuous Venous-Arterial Doppler Ultrasound During a Preload Challenge
Published on: January 20, 2023
Concordance between linear deflection oscillometry and Doppler decreases as systolic arterial pressure increases in
Matheus M Mantovani1, Juliana A Favato2, Any C A Costa1
1Faculty of Veterinary Medicine and Animal Science, Federal University of Uberlândia, Uberlândia, Brazil.
Objective:
To evaluate the agreement between linear deflection oscillometry (LDO) and Doppler ultrasonography (DU) for measuring systolic arterial pressure (SAP) in nonsedated dogs.
Methods:
Prospective, cross-sectional study, conducted at 2 veterinary teaching hospitals. The study included nonsedated, hospitalized dogs classified by DU SAP as normotensive (90 to 160 mm Hg), hypotensive (< 90 mm Hg), or hypertensive (> 160 mm Hg). The SAP was measured using both DU and LDO.
Results:
60 dogs were included (29 normotensive, 17 hypotensive, 14 hypertensive). Passing-Bablok regression demonstrated a significant systematic (intercept, 17.6; 95% CI, 7.4 to 29.7; P < .01) and proportional bias (slope, 0.81; 95% CI, 0.71 to 0.92; P < .01), indicating progressively larger differences between DU and LDO at higher SAP values. Bland-Altman analysis showed a bias of -3.0 ± 8.49 mm Hg (limits of agreement [LoA], -19.66 to 13.64) in hypotensive dogs, 1.66 ± 11.96 mm Hg (LoA, -21.8 to 25.1) in normotensive dogs, and 26.7 ± 26.17 mm Hg (LoA, -24.77 to 78.2) in hypertensive. Receiver operating characteristic analysis suggested LDO thresholds of 93 mm Hg for DU SAP < 90 mm Hg (AUC, 0.994; P < .0001) and 143 mm Hg for DU SAP > 160 mm Hg (AUC, 0.891; P < .0001).
Conclusions:
LDO and DU demonstrated acceptable agreement in normotensive and hypotensive dogs but weak concordance in hypertensive.
Clinical Relevance:
LDO may be a practical alternative to DU in normotensive and hypotensive states, but caution is warranted in hypertensive patients.
More Related Videos
06:39Ultrasound Based Assessment of Coronary Artery Flow and Coronary Flow Reserve Using the Pressure Overload Model in Mice
Published on: April 13, 2015
09:24O-Ring Aortic Banding Versus Traditional Transverse Aortic Constriction for Modeling Pressure Overload-Induced Cardiac Hypertrophy
Published on: October 6, 2022
Related Concept Videos
01:19Assessing Blood pressure using a doppler ultrasound
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:
01:30Equipments Used To Measure Blood Pressure
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
01:17Measurement of Blood Pressure
01:28Special considerations while measuring blood pressure
Monitoring Both Arms:
Monitoring BP in both arms during the initial assessment is advisable, as the systolic value may differ by five to ten mm Hg between arms. For subsequent BP assessments, use the arm with the higher reading.
01:21Sites for measruring blood pressure
The Brachial Artery: Primary Site for Blood Pressure Measurement
01:23Assessment of blood pressure in brachial artery(two-step method)