Measuring level of agreement between values obtained by directly measured blood pressure and ultrasonic Doppler flow detector in cats

2014 ◽  
Vol 24 (3) ◽  
pp. 272-278 ◽  
Author(s):  
Anderson F. da Cunha ◽  
Katrin Saile ◽  
Hugues Beaufrère ◽  
Wendy Wolfson ◽  
Diana Seaton ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Doppler Flow ◽  
Level Of Agreement ◽  
Flow Detector

Absence of efficacy of ultrasonic two-way Doppler flow detector in routine percutaneous arterial cannulation

2003 ◽  
Vol 17 (3) ◽  
pp. 206-207 ◽  
Author(s):  
Hideo Horikawa ◽  
Toshihiko Tada ◽  
Sumio Amagasa
Keyword(s):  
Arterial Cannulation ◽  
Doppler Flow ◽  
Flow Detector

Agreement between oscillometric and direct blood pressure measurements in anesthetized captive chimpanzees (Pan troglodytes)

2021 ◽  
pp. 1-7
Author(s):  
Christopher K. Smith ◽  
Anthony L. Ashley ◽  
Xiaojuan Zhu ◽  
Andrew C. Cushing
Keyword(s):  
Blood Pressure ◽  
Arterial Pressure ◽  
Pan Troglodytes ◽  
Reasonable Agreement ◽  
Patient Monitoring ◽  
Systolic Arterial Pressure ◽  
Pressure Measurements ◽  
Concurrent Study ◽  
Direct Blood Pressure ◽  
Level Of Agreement

Abstract OBJECTIVE To evaluate the level of agreement (LOA) between direct and oscillometric blood pressure (BP) measurements and the ability of oscillometric measurements to accurately detect hypotension in anesthetized chimpanzees (Pan troglodytes). ANIMALS 8 captive, adult chimpanzees. PROCEDURES During prescheduled annual examinations, each chimpanzee underwent general anesthesia and patient monitoring for their examination, echocardiography for a concurrent study, and measurement of direct BP with the use of tibial artery catheterization and oscillometry with the use of a cuff placed around a brachium and a cuff placed around the second digit of the contralateral forelimb for the present study. Bland-Altman plots were generated to compare results for direct and oscillometric BP measurements. Mean bias and 95% LOAs were calculated for oscillometric measurements of systolic arterial pressure (SAP), diastolic arterial pressure (DAP), and mean arterial pressure (MAP) for each cuff site. Sensitivity and specificity in detecting hypotension were also determined for each cuff site. RESULTS There were 74 paired direct and brachial oscillometric measurements of each, SAP, MAP, and DAP and 66 paired direct and digit oscillometric measurements of each, SAP, MAP, and DAP. Only brachial oscillometric measurements of MAP had adequate sensitivity (78%) and specificity (95%) to accurately detect hypotension, and this technique also had the least mean bias (0.8 mm Hg; 95% LOA, –29 to 31 mm Hg). CONCLUSIONS AND CLINICAL RELEVANCE Results indicated that brachial oscillometric measurement of MAP provided reasonable agreement with tibial arterial direct MAP measurement and performed well in diagnosing hypotension in anesthetized chimpanzees.

Abstract P200: Oscillometric Ambulatory Blood Pressure Monitors Are Prone To Clinically & Statistically Significant Errors When Tested In A Controlled Laboratory Setting

Hypertension ◽  
2020 ◽  
Vol 76 (Suppl_1) ◽  
Author(s):  
V. P Lombardi ◽  
Patrick C Reichhold ◽  
Jennifer L Cramer ◽  
Hannah P Harkness ◽  
Natalie J DeBell ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Ambulatory Blood Pressure ◽  
Cuff Pressure ◽  
Field Testing ◽  
Laboratory Setting ◽  
Essential Component ◽  
Blood Pressure Monitors ◽  
Extreme Variability ◽  
Testing Protocols ◽  
Level Of Agreement

Purpose: To compare the accuracy & level of agreement of Oscar 2 & Spacelabs 90207 ABPMs with 2 observers (O1O2) using an Hg column & ThinkLabs digital stethoscope. Methods: O1O2 measured simultaneous same arm Hg column BPs & ABPMs assessed simultaneous opposite arm BPs in triplicate in 17 seated subjects (7 ♀, 10 ♂). Supine, seated & standing BPs were measured using non-dominant relaxed arms in 12 subjects. Hypotheses: ABPM & O1O2 BPs would differ clinically & statistically with accuracy based on posture because ABPM proprietary equations are derived from seated BPs & use peak cuff pressure to estimate systolic (SBP) & diastolic (DBP) pressures. Results: For seated subjects, the Oscar overestimated O1O2 SBP by ~ 10 mm Hg (Δ = -9.8 ± 9.4 mm Hg, P < 0.001), but with extreme variability as 95% of Oscar SBPs were 9.0 mm Hg below to 28.7 mm Hg above O1O2. The Spacelabs overestimated O1O2 SBP by ~ 5 mm Hg (Δ = -5.2 ± 7.8 mm Hg, P < 0.001) with 95% of Spacelabs SBPs 10.5 mm Hg below to 20.9 mm Hg above O1O2. There was a stepwise increase in the Oscars’ SBP overestimation of Hg column BPs from supine (-3.1 mm Hg, P < 0.01), to seated (-5.3 mm Hg, P < 0.001) to standing (-6.6 mm Hg, P < 0.01). The Oscar overestimated supine (-7.0 mm Hg, P < 0.001), but underestimated standing (3.9 mm Hg, P < 0.05) DBPs. The Spacelabs also overestimated supine (-6.5 mm Hg, P < 0.001), but underestimated standing (4.8 mm Hg, P < 0.01) DBPs. Conclusions: Our results confirm that leading oscillometric ABPMs are prone to clinically & statistically significant errors even in a controlled lab setting. Given that ABPMs are motion intolerant & unable to assess & adjust for a patient’s posture, errors will be compounded during 24-hr field testing. Results will vary based on the ABPM & postural %s assumed by each patient. International & national ABPM testing protocols must be strengthened & require postural testing as an essential component of validation.

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