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Goncin U, Liu KK, Rawlyk B, Dalkilic S, Walker MEJ, Norton J, Hedlin P. Comparison of the ClearSight™ finger cuff monitor versus invasive arterial blood pressure measurement in elective cardiac surgery patients: a prospective observational study. Can J Anaesth 2024:10.1007/s12630-024-02834-x. [PMID: 39317830 DOI: 10.1007/s12630-024-02834-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 03/04/2024] [Accepted: 04/30/2024] [Indexed: 09/26/2024] Open
Abstract
PURPOSE To determine the acceptability of the ClearSight™ system (Edwards Lifesciences Corp., Irvine, CA, USA) for continuous blood pressure monitoring during elective cardiac surgery compared with arterial catheterization. METHODS We enrolled 30 patients undergoing elective cardiac surgery in a prospective observational study. Blood pressure measurements were recorded every 10 sec intraoperatively. We determined agreement based on the Association for the Advancement of Medical Instrumentation (AAMI) recommendations. Statistical analysis included fixed bias (difference of measurements between methods), percentage error (accuracy between ClearSight measurement and expected measurement from arterial line), and interchangeability (ability to substitute ClearSight monitor without effecting overall outcome of analysis). We used a paired samples t test to compare the time required for placing each monitor. RESULTS We found fixed bias in the differences between the ClearSight monitor and invasive arterial blood pressure measurement in systolic blood pressure (SBP; mean difference, 8.7; P < 0.001) and diastolic blood pressure (DBP; mean difference, -2.2; P < 0.001), but not in mean arterial pressure (MAP; mean difference, -0.5; P < 0.001). Bland-Altman plots showed that the means of the limits of agreement were greater than 5 mm Hg for SBP, DBP, and MAP. The percentage errors for SBP, DBP, and MAP were lower than the cutoff we calculated from the invasive arterial blood pressure measurements. Average interchangeability rates were 38% for SBP, 50% for DBP, and 50% for MAP. Placement of the ClearSight finger cuff was significantly faster compared with arterial catheterization (mean [standard deviation], 1.7 [0.6] min vs 5.6 [4.1] min; P < 0.001). CONCLUSIONS In this prospective observational study, we did not find the ClearSight system to be an acceptable substitute for invasive arterial blood pressure measurement in elective cardiac surgery patients according to AAMI guidelines. Nevertheless, based on statistical standards, there is evidence to suggest otherwise. STUDY REGISTRATION ClinicalTrials.gov ( NCT05825937 ); first submitted 11 April 2023.
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Affiliation(s)
- Una Goncin
- Provincial Department of Anesthesiology, College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada
| | - Kaixuan K Liu
- Provincial Department of Anesthesiology, College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada
| | - Brooklyn Rawlyk
- Provincial Department of Anesthesiology, College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada
| | - Sara Dalkilic
- Department of Surgery, College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada
| | - Mary Ellen J Walker
- Provincial Department of Anesthesiology, College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada
| | - Jonathan Norton
- Department of Surgery, College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada
| | - Peter Hedlin
- Provincial Department of Anesthesiology, College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada.
- Provincial Department of Anesthesiology, University of Saskatchewan, Royal University Hospital, G525-103 Hospital Dr., Saskatoon, SK, S7N 0W8, Canada.
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Lakhal K, Dauvergne JE, Messet-Charriere H, Nay MA, Kamel T, Muller G, Robert-Edan V, Rozec B, Ehrmann S, Jacquier S, Boulain T. Risk factors for poor performance in finger cuff non-invasive monitoring of arterial pressure: A prospective multicenter study. Anaesth Crit Care Pain Med 2024; 43:101333. [PMID: 38048986 DOI: 10.1016/j.accpm.2023.101333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Revised: 11/20/2023] [Accepted: 11/21/2023] [Indexed: 12/06/2023]
Abstract
BACKGROUND Compared to the invasive technique, non-invasive monitoring of arterial pressure favors easier and faster implementation while potentially sacrificing some reliability. This may be particularly true for the Clearsight™ system (Edwards Lifesciences), which enables continuous monitoring. We evaluated the risk factors for its poor performance. METHODS Patients with an arterial catheter and stable mean arterial pressure (MAP) over a 5-min period were included. Six pairs of invasive and Clearsight measurements of MAP were collected and the bias between the two techniques was calculated. Poor performance of the Clearsight™ system was defined as either a failure to measure and display MAP or displaying an erroneous MAP (individual bias > 5 mmHg). Fingertip perfusion was assessed using the plethysmographic perfusion index (PI) and the capillary refill time (CRT). RESULTS Among 152 ICU patients (MAP of 81 ± 14 mmHg, norepinephrine in 78 [51%]), 78 (51%) experienced a poor performance of the Clearsight™ system: failure to display MAP in 19 (13%) patients, and erroneous value displayed in 59 (44%). In multivariate analysis, PI ≤ 0.85% (adjusted odds ratio [aOR] = 2.94 [95% confidence interval (95%CI):1.34;6.45]), CRT > 4 s (aOR = 5.28 [95%CI 1.39;20.05]), and the presence of hand edema (aOR = 2.06 [95%CI 1.01;4.21]) were associated with a higher likelihood of poor performance. Cardiac arrhythmia (aOR = 1.39 [95%CI 0.64;3.02]) and other tested variables were not associated with poor performance. CONCLUSIONS Half of the included patients exhibited poor Clearsight™ system performance. Our results caution against using finger cuff arterial pressure monitoring in patients with low PI (≤0.85%), protracted CRT (>4 s), or hand edema. REGISTRATION ClinicalTrials.gov, NCT04269382, Dr. G. Muller, February 13, 2020. https://classic. CLINICALTRIALS gov/ct2/show/NCT04269382.
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Affiliation(s)
- Karim Lakhal
- Nantes Université, CHU Nantes, Department of Anesthesiology and Critical Care at Laënnec Hospital, University Hospital of Nantes, F-44000 Nantes, France.
| | - Jérôme E Dauvergne
- Nantes Université, CHU Nantes, Department of Anesthesiology and Critical Care at Laënnec Hospital, University Hospital of Nantes, F-44000 Nantes, France
| | | | - Mai-Anh Nay
- Service de médecine intensive-réanimation, Centre Hospitalier Universitaire d'Orléans, 14 avenue de l'hôpital, 45100 Orléans, France
| | - Toufik Kamel
- Service de médecine intensive-réanimation, Centre Hospitalier Universitaire d'Orléans, 14 avenue de l'hôpital, 45100 Orléans, France
| | - Grégoire Muller
- Service de médecine intensive-réanimation, Centre Hospitalier Universitaire d'Orléans, 14 avenue de l'hôpital, 45100 Orléans, France; CRICS-TriggerSep F-CRIN research network, Tours, France; Université de Tours, EA4245, Transplantation, Immunologie, Inflammation, Tours, France
| | - Vincent Robert-Edan
- Nantes Université, CHU Nantes, Department of Anesthesiology and Critical Care at Laënnec Hospital, University Hospital of Nantes, F-44000 Nantes, France
| | - Bertrand Rozec
- Nantes Université, CHU Nantes, Department of Anesthesiology and Critical Care at Laënnec Hospital, University Hospital of Nantes, F-44000 Nantes, France; Institut du Thorax, Institut National de la Santé et de la Recherche Médicale (INSERM), Centre National de la Recherche Scientifique (CNRS), Université de Nantes, Nantes F-44093, France
| | - Stephan Ehrmann
- CHRU Tours, Médecine Intensive Réanimation, CIC INSERM 1415, Tours, France; CRICS-TriggerSep F-CRIN research network, Tours, France; INSERM, Centre d'étude des pathologies respiratoires, U1100 Tours, France; Université de Tours, Tours, France
| | - Sophie Jacquier
- CHRU Tours, Médecine Intensive Réanimation, CIC INSERM 1415, Tours, France
| | - Thierry Boulain
- Service de médecine intensive-réanimation, Centre Hospitalier Universitaire d'Orléans, 14 avenue de l'hôpital, 45100 Orléans, France
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Conter P, Briegel J, Baehner T, Kreitmeier A, Meidert AS, Tholl M, Schwimmbeck F, Bauer A, Pfeiffer UJ. Noninvasive Assessment of Arterial Pulse-Pressure Variation During General Anesthesia: Clinical Evaluation of a New High-Fidelity Upper Arm Cuff. J Cardiothorac Vasc Anesth 2023:S1053-0770(23)00230-6. [PMID: 37100636 DOI: 10.1053/j.jvca.2023.03.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 03/15/2023] [Accepted: 03/29/2023] [Indexed: 04/28/2023]
Abstract
OBJECTIVES To compare noninvasive pulse-pressure variation (PPV) measurements obtained from a new high-fidelity upper arm cuff using a hydraulic coupling technique to corresponding intraarterial PPV measurements. DESIGN The authors used prospective multicenter comparison and development studies for the new high-fidelity upper arm cuff. SETTING The study was performed in the departments of Anesthesiology at the Ludwig-Maximilians-Universität München Hospital, the University Hospital of Bonn, and the RoMed Hospital in Rosenheim (all Germany). PARTICIPANTS A total of 153 patients were enrolled, undergoing major abdominal surgery or neurosurgery with mechanical ventilation. For the evaluation of PPV, 1,467 paired measurements in 107 patients were available after exclusion due to predefined quality criteria. INTERVENTIONS Simultaneous measurements of PPV were performed from a reference femoral arterial catheter (PPVref) and the high-fidelity upper arm cuff (PPVcuff). The new device uses a semirigid conical shell. It incorporates a hydraulic sensor pad with a pressure transducer, leading to a tissue pressure-pulse contour with all characteristics of an arterial- pulse contour. MEASUREMENTS AND MAIN RESULTS The comparative analysis of the included measurements showed that PPVref and PPVcuff were closely correlated (r = 0.92). The mean of the differences between PPVref and PPVcuff was 0.1 ± 2.0%, with 95% limits of agreement between -4.1% and 3.9%. To track absolute changes in PPV >2%, the concordance rate between the 2 methods was 93%. CONCLUSIONS The new high-fidelity upper arm cuff method provided a clinically reliable estimate of PPV.
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Affiliation(s)
- Philippe Conter
- Department of Anesthesiology, University Hospital, LMU Munich, Munich, Germany.
| | - Josef Briegel
- Department of Anesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - Torsten Baehner
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
| | - Alois Kreitmeier
- Department of Anesthesiology, RoMed Klinikum, Rosenheim, Germany
| | - Agnes S Meidert
- Department of Anesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - Martin Tholl
- Department of Anesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - Franz Schwimmbeck
- Department of Anesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - Andreas Bauer
- Department of Anesthesiology, RoMed Klinikum, Rosenheim, Germany
| | - Ulrich J Pfeiffer
- Philips Medizin Systeme Boeblingen, Germany, Philips Business Unit Hospital Patient Monitoring, Boeblingen, Germany
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Menon A, R. D. Use of peripheral perfusion index (PI) as a predictor of cardiovascular complications in hospitalised Covid 19 patients - A pilot study. Biomedicine (Taipei) 2022. [DOI: 10.51248/.v42i5.1846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Introduction and Aim: Cardiovascular complications have been associated with fatality in Covid-19 patients. Reduced peripheral perfusion is a marker for cardiovascular dysfunction. Peripheral Perfusion Index (PI) is a non-invasive measure of microvascular perfusion with regards to pulsatile arterial blood flow. The study was aimed at finding the utility of PI as a hemodynamic marker in Covid-19.
Materials and Methods: Observational study done on 58 hospitalised adult Covid-19 patients over a span of 6 days. Each day the hemodynamic parameters such as pulse rate, SpO2 and Peripheral Perfusion Index (PI) were measured using a finger pulse oximeter. Peripheral Blood pressure was measured using automated BP apparatus. Mean Arterial Pressure (MAP) and pulse pressure (PP) was calculated.
Results: Correlation between PI and other parameters checked using Pearson’s test. There was significant positive correlation between PI and PP in day wise analysis during first 2 days with linear regression showing PP can be predicted as a dependant function from PI. This shows the association between PI and systemic cardiovascular function.
Conclusion: PI is a useful measure of peripheral microvascular perfusion and relates to systemic PP. It can be predicted from the results that PI can act as a reliable guide to predict the cardiovascular condition of the patient. As PI is measured from finger pulse oximeter, it is a non-invasive and easy-to-record method, which can be used by untrained personnel in Covid-19 patients.
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Helmer P, Helf D, Sammeth M, Winkler B, Hottenrott S, Meybohm P, Kranke P. The Use of Non-Invasive Continuous Blood Pressure Measuring (ClearSight®) during Central Neuraxial Anaesthesia for Caesarean Section—A Retrospective Validation Study. J Clin Med 2022; 11:jcm11154498. [PMID: 35956113 PMCID: PMC9369920 DOI: 10.3390/jcm11154498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 07/25/2022] [Accepted: 07/28/2022] [Indexed: 11/23/2022] Open
Abstract
The close monitoring of blood pressure during a caesarean section performed under central neuraxial anaesthesia should be the standard of safe anaesthesia. As classical oscillometric and invasive blood pressure measuring have intrinsic disadvantages, we investigated a novel, non-invasive technique for continuous blood pressure measuring. Methods: In this monocentric, retrospective data analysis, the reliability of continuous non-invasive blood pressure measuring using ClearSight® (Edwards Lifesciences Corporation) is validated in 31 women undergoing central neuraxial anaesthesia for caesarean section. In addition, patients and professionals evaluated ClearSight® through questioning. Results: 139 measurements from 11 patients were included in the final analysis. Employing Bland–Altman analyses, we identified a bias of −10.8 mmHg for systolic, of −0.45 mmHg for diastolic and of +0.68 mmHg for mean arterial blood pressure measurements. Pooling all paired measurements resulted in a Pearson correlation coefficient of 0.7 for systolic, of 0.67 for diastolic and of 0.75 for mean arterial blood pressure. Compensating the interindividual differences in linear regressions of the paired measurements provided improved correlation coefficients of 0.73 for systolic, of 0.9 for diastolic and of 0.89 for mean arterial blood pressure measurements. Discussion: Diastolic and mean arterial blood pressure are within an acceptable range of deviation from the reference method, according to the Association for the Advancement of Medical Instrumentation (AAMI) in the patient collective under study. Both patients and professionals prefer ClearSight® to oscillometric blood pressure measurement in regard of comfort and handling.
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Affiliation(s)
- Philipp Helmer
- Department of Anaesthesiology, Intensive Care, Emergency and Pain Medicine, University Hospital Würzburg, Oberdürrbacher Str. 6, 97080 Würzburg, Germany; (P.H.); (D.H.); (M.S.); (B.W.); (S.H.); (P.M.)
| | - Daniel Helf
- Department of Anaesthesiology, Intensive Care, Emergency and Pain Medicine, University Hospital Würzburg, Oberdürrbacher Str. 6, 97080 Würzburg, Germany; (P.H.); (D.H.); (M.S.); (B.W.); (S.H.); (P.M.)
| | - Michael Sammeth
- Department of Anaesthesiology, Intensive Care, Emergency and Pain Medicine, University Hospital Würzburg, Oberdürrbacher Str. 6, 97080 Würzburg, Germany; (P.H.); (D.H.); (M.S.); (B.W.); (S.H.); (P.M.)
- Department of Applied Sciences, Coburg University, Friedrich-Streib-Str. 2, 96450 Coburg, Germany
| | - Bernd Winkler
- Department of Anaesthesiology, Intensive Care, Emergency and Pain Medicine, University Hospital Würzburg, Oberdürrbacher Str. 6, 97080 Würzburg, Germany; (P.H.); (D.H.); (M.S.); (B.W.); (S.H.); (P.M.)
| | - Sebastian Hottenrott
- Department of Anaesthesiology, Intensive Care, Emergency and Pain Medicine, University Hospital Würzburg, Oberdürrbacher Str. 6, 97080 Würzburg, Germany; (P.H.); (D.H.); (M.S.); (B.W.); (S.H.); (P.M.)
| | - Patrick Meybohm
- Department of Anaesthesiology, Intensive Care, Emergency and Pain Medicine, University Hospital Würzburg, Oberdürrbacher Str. 6, 97080 Würzburg, Germany; (P.H.); (D.H.); (M.S.); (B.W.); (S.H.); (P.M.)
| | - Peter Kranke
- Department of Anaesthesiology, Intensive Care, Emergency and Pain Medicine, University Hospital Würzburg, Oberdürrbacher Str. 6, 97080 Würzburg, Germany; (P.H.); (D.H.); (M.S.); (B.W.); (S.H.); (P.M.)
- Correspondence:
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Juri T, Suehiro K, Kanematsu R, Takahashi K, Fujimoto Y, Tanaka K, Mori T. Validation of Continuous Noninvasive Blood Pressure Monitoring Using Error Grid Analysis. Anesth Analg 2022; 134:773-780. [PMID: 35051952 DOI: 10.1213/ane.0000000000005882] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Error grid analysis was recently proposed to compare blood pressure obtained by 2 measurement methods. This study aimed to compare continuous noninvasive blood pressure (CNBP) with invasive blood pressure (IBP) using the error grid analysis and investigate the confounding risk factors attributable to the differences between CNBP and IBP. METHODS Sixty adult patients undergoing general anesthesia were prospectively enrolled. Simultaneous comparative data regarding CNBP and IBP were collected. The Bland-Altman analysis was conducted to compare CNBP and IBP for systolic blood pressure (SBP) and mean blood pressure (MBP; acceptable accuracy: mean bias <5 mm Hg; standard deviation <8 mm Hg). The clinical relevance of the discrepancies between CNBP and IBP was evaluated by the error grid analysis, which classifies the differences into 5 zones from "no risk" (A) to "dangerous risk" (E). Additionally, an ordinal logistic regression analysis was performed to evaluate the relationship between the risk zones for MBP, classified by the error grid analysis and covariates of interest. RESULTS A total of 10,663 pairs of CNBP/IBP were finally analyzed. The Bland-Altman analysis showed an acceptable accuracy with a bias of -3.3 ± 5.6 mm Hg for MBP but a poor accuracy with a bias of 5.4 ± 10.5 mm Hg for SBP. The error grid analysis showed the proportions of zones A to E as 96.7%, 3.2%, 0.1%, 0%, and 0% for SBP, respectively, and 72.0%, 27.9%, 0.1%, 0%, and 0% for MBP, respectively. The finger cuff missed 23.9% of epochs when SBP <90 mm Hg and 55.3% of epochs when MBP <65 mm Hg. The ordinal logistic regression analysis revealed that older age (adjusted odds ratio for decade: 1.54, 95% confidence interval [CI], 1.15-2.08; P = .004) and length of time from the initiation of finger cuff inflation (adjusted odds ratio for 60 minutes: 1.40, 95% CI, 1.13-1.73; P = .002) were significant factors of being in a more dangerous zone of the error grid. CONCLUSIONS The error grid analysis revealed the larger clinical discrepancy between CNBP and IBP in MBP compared with that in SBP. Old age and longer finger cuff inflation time were significant factors of being in a more dangerous zone of the error grid, which could affect the hemodynamic management during surgery.
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Affiliation(s)
- Takashi Juri
- From the Department of Anesthesiology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Koichi Suehiro
- From the Department of Anesthesiology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Rieko Kanematsu
- From the Department of Anesthesiology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Kanae Takahashi
- Department of Biostatistics, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Yohei Fujimoto
- From the Department of Anesthesiology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Katsuaki Tanaka
- From the Department of Anesthesiology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Takashi Mori
- From the Department of Anesthesiology, Osaka City University Graduate School of Medicine, Osaka, Japan
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Nakasuji M, Nakasuji K. Causes of arterial hypotension during anesthetic induction with propofol investigated with perfusion index and ClearSightTM in young and elderly patients. Minerva Anestesiol 2021; 87:640-647. [PMID: 33688696 DOI: 10.23736/s0375-9393.21.15226-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Mechanism underlying the hypotension during anesthetic induction in elderly patients is inferred to differ from that in younger patients due to structural changes in arteries. The aim of the study was to determine if a decrease in cardiac output (CO) or systemic vascular resistance (SVR) is the main mechanism of the hypotension. METHODS Fifty-six patients comprising 28 healthy elderly patients aged 75-90 years (group E) and 28 healthy younger patients aged 20-40 years (group Y) were enrolled. General anesthesia was induced with propofol (1.2 mg/kg, group E; 2 mg/kg, group Y), remifentanil (0.15 µg/kg/min, group E; 0.3 µg/kg/min, group Y) and rocuronium. Primary outcome was to compare serial changes in PI of Radical-7TM, SVR, CO and stroke volume variations (SVV) of ClearSightTM (Edwards Lifesciences Corp., Irvine, CA, USA) during the five-minute period from propofol administration until intubation. RESULTS The degree of increase in PI and reduction in SVR in group Y were significantly greater than those in group E (P<0.01 with repeated measure ANOVA). The degree of reduction in CO and increase in SVV were significantly larger in group E (P<0.01). All values of mean arterial blood pressure measured during the five-minute correlated negatively with PI in group Y (r=0.44, P<0.01) and positively with CO in group E (r=0.4, P<0.01). CONCLUSIONS The main mechanisms of hypotension during anesthetic induction contribute to the decrease in CO in elderly and reduction of SVR in younger. PI only shows the vascular tone of a finger but can be a surrogate for SVR.
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Affiliation(s)
- Masato Nakasuji
- Department of Anesthesiology, Kansai Electric Power Hospital, Osaka, Japan - .,Division of Anesthesiology and Critical Care Medicine, Kansai Electric Power Medical Research Institute, Osaka, Japan -
| | - Kae Nakasuji
- Department of Anesthesiology, Kansai Electric Power Hospital, Osaka, Japan
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Clinical Evaluation of a High-fidelity Upper Arm Cuff to Measure Arterial Blood Pressure during Noncardiac Surgery. Anesthesiology 2020; 133:997-1006. [PMID: 33048167 DOI: 10.1097/aln.0000000000003472] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND In most patients having noncardiac surgery, blood pressure is measured with the oscillometric upper arm cuff method. Although the method is noninvasive and practical, it is known to overestimate intraarterial pressure in hypotension and to underestimate it in hypertension. A high-fidelity upper arm cuff incorporating a hydraulic sensor pad was recently developed. The aim of the present study was to investigate whether noninvasive blood pressure measurements with the new high-fidelity cuff correspond to invasive measurements with a femoral artery catheter, especially at low blood pressure. METHODS Simultaneous measurements of blood pressure recorded from a femoral arterial catheter and from the high-fidelity upper arm cuff were compared in 110 patients having major abdominal surgery or neurosurgery. RESULTS 550 pairs of blood pressure measurements (5 pairs per patient) were considered for analysis. For mean arterial pressure measurements, the average bias was 0 mmHg, and the precision was 3 mmHg. The Pearson correlation coefficient was 0.96 (P < 0.0001; 95% CI, 0.96 to 0.97), and the percentage error was 9%. Error grid analysis showed that the proportions of mean arterial pressure measurements done with the high-fidelity cuff method were 98.4% in zone A (no risk), 1.6% in zone B (low risk) and 0% in zones C, D, and E (moderate, significant, and dangerous risk, respectively). The high-fidelity cuff method detected mean arterial pressure values less than 65 mmHg with a sensitivity of 84% (95% CI, 74 to 92%) and a specificity of 97% (95% CI, 95% to 98%). To detect changes in mean arterial pressure of more than 5 mmHg, the concordance rate between the two methods was 99.7%. Comparable accuracy and precision were observed for systolic and diastolic blood pressure measurements. CONCLUSIONS The new high-fidelity upper arm cuff method met the current international standards in terms of accuracy and precision. It was also very accurate to track changes in blood pressure and reliably detect severe hypotension during noncardiac surgery. EDITOR’S PERSPECTIVE
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