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.

scholarly journals Sex differences in blood pressure responsiveness to spontaneous K-complexes during stage II sleep

2020 ◽  
Author(s):  
Ian Mark Greenlund ◽  
Carl A. Smoot ◽  
Jason R. Carter
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Arterial Pressure ◽  
Cardiac Cycle ◽  
Pressor Response ◽  
Systolic Arterial Pressure ◽  
Stage Ii ◽  
Men And Women ◽  
Blood Pressures ◽  
Blood Pressure Responses

K-complexes are a key marker of non-rapid eye movement sleep (NREM), specifically during stages II sleep. Recent evidence suggests the heart rate responses to a K-complexes may differ between men and women. The purpose of this study was to compare beat-to-beat blood pressure responses to K-complexes in men and women. We hypothesized that the pressor response following a spontaneous K-complex would be augmented in men compared to women. Ten men (Age: 23 ± 2 years, BMI: 28 ± 4 kg/m2) and ten women (Age: 23 ± 5 years, BMI: 25 ± 4 kg/m2) were equipped with overnight finger plethysmography and standard 10-lead polysomnography. Hemodynamic responses to a spontaneous K-complex during stable stage II sleep were quantified for 10 consecutive cardiac cycles, and measurements included systolic arterial pressure (SAP), diastolic arterial pressure (DAP), and heart rate. K-complex elicited greater pressor responses in men when blood pressures were expressed as SAP (cardiac cycle × sex: p = 0.007) and DAP (cardiac cycle × sex: p = 0.004). Heart rate trended to be different between men and women (cardiac cycle × sex: p = 0.078). These findings suggest a divergent pressor response between men and women following a spontaneous K-complex during normal stage II sleep. These findings could contribute to sex-specific differences in cardiovascular risk that exist between men and women.

scholarly journals A Comparison of Three Fluid-Vasopressor Regimens Used to Prevent Hypotension during Subarachnoid Anaesthesia in the Elderly

1998 ◽  
Vol 26 (5) ◽  
pp. 497-502 ◽  
Author(s):  
J. C. M. Yap ◽  
L. A. H. Critchley ◽  
S. C. Yu ◽  
R. M. Calcroft ◽  
J. L. Derrick
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Arterial Pressure ◽  
Elderly Patients ◽  
Hip Fractures ◽  
Normal Saline ◽  
Computer Software ◽  
Systolic Arterial Pressure ◽  
The Elderly ◽  
Group A

We aimed to compare the efficacy of fluid preloading with two recently recommended fluid-vasopressor regimens for maintaining blood pressure during subarachnoid anaesthesia in the elderly. Sixty elderly patients requiring surgery for traumatic hip fractures received subarachnoid anaesthesia using 0.05 ml/kg of 0.5% heavy bupivacaine. Hypotension, i.e. systolic arterial pressure <75% of baseline, was prevented or treated by: A—normal saline 16 ml/kg plus intravenous ephedrine boluses (0.1 mg/kg); B—normal saline 8 ml/kg plus intramuscular depot ephedrine (0.5 mg/kg); or C—Haemaccel 8 ml/kg plus metaraminol infusion. Systolic arterial pressure and heart rate were recorded using custom-written computer software (Monitor, version 1.0). Systolic arterial pressure decreased in all groups after five minutes (P<0.001). Decreases were greatest in group A (P<0.05). Heart rate increased by 7% group A and decreased by 9% in group C (P<0.05). During the first hour, hypotension was present for 47%, 25% and 20% of the time in groups A, B and C respectively and overcorrection of systolic arterial pressure occurred in 19% of the time in group C. We conclude that treatment A was inadequate in preventing hypotension. Treatments B and C were more effective but were associated with an increased heart rate and overcorrection of systolic arterial pressure respectively.

Association between decreased blood pressure and azotaemia in canine babesiosis

2014 ◽  
Vol 17 (1) ◽  
pp. 173-175 ◽  
Author(s):  
W. Zygner ◽  
O. Gójska-Zygner
Keyword(s):  
Blood Pressure ◽  
Mean Arterial Pressure ◽  
Arterial Pressure ◽  
Serum Creatinine ◽  
Renal Damage ◽  
Systolic Arterial Pressure ◽  
Babesia Canis ◽  
Canine Babesiosis ◽  
Tubular Necrosis ◽  
Blood Pressures

Abstract Acute tubular necrosis (ATN) was described in canine babesiosis. Hypotension is considered as one of the factors which influence the development of hypoxic renal damage. In this study hypotension defined as mean arterial pressure (MAP) < 80 mmHg was detected in 7 out of 48 dogs (14.6%) infected with Babesia canis. Lower systolic arterial pressure (SAP), diastolic arterial pressure (DAP) and MAP were detected in azotaemic dogs infected with B. canis. Statistically significant negative correlations between blood pressures (SAP, DAP and MAP) and serum creatinine and urea concentrations showed the influence of decreased blood pressure on the development of azotaemia and is probably also associated with ATN in canine babesiosis.

Comparison of the indirect oscillometric and direct arterial methods for blood pressure measurements in anesthetized dogs

1996 ◽  
Vol 32 (6) ◽  
pp. 471-475 ◽  
Author(s):  
KM Meurs ◽  
MW Miller ◽  
MR Slater
Keyword(s):  
Blood Pressure ◽  
Arterial Pressure ◽  
Surgical Procedures ◽  
Blood Pressure Measurement ◽  
Single Point ◽  
Systemic Arterial Pressure ◽  
Pressure Measurements ◽  
Oscillometric Method ◽  
Anesthetized Dogs ◽  
Weight Groups

The indirect oscillometric method of blood pressure measurement was compared to the direct arterial puncture method in 15 anesthetized dogs, divided into three weight groups, undergoing a variety of surgical procedures. The objectives of this study were to determine the accuracy of the indirect oscillometric method at a single point in time and when sequential values were averaged. Additionally, the ability to detect systemic hypotension (i.e., mean systemic arterial pressure less than 60 mmHg) was evaluated. The method had the highest correlation coefficient (r of 0.8) when five sequential values were averaged and compared, and it appeared to be sensitive (100%) and specific (91%) for detecting hypotension.

scholarly journals Level of agreement between Nexfin non-invasive arterial pressure with invasive arterial pressure measurements in children

2012 ◽  
Vol 109 (4) ◽  
pp. 609-615 ◽  
Author(s):  
R.P. Garnier ◽  
A.G.E. van der Spoel ◽  
R. Sibarani-Ponsen ◽  
D.G. Markhorst ◽  
C. Boer
Keyword(s):  
Arterial Pressure ◽  
Pressure Measurements ◽  
Non Invasive ◽  
Invasive Arterial Pressure ◽  
Level Of Agreement
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