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Bress AP, Anderson TS, Flack JM, Ghazi L, Hall ME, Laffer CL, Still CH, Taler SJ, Zachrison KS, Chang TI. The Management of Elevated Blood Pressure in the Acute Care Setting: A Scientific Statement From the American Heart Association. Hypertension 2024; 81:e94-e106. [PMID: 38804130 DOI: 10.1161/hyp.0000000000000238] [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] [Indexed: 05/29/2024]
Abstract
Over the past 3 decades, a substantial body of high-quality evidence has guided the diagnosis and management of elevated blood pressure (BP) in the outpatient setting. In contrast, there is a lack of comparable evidence for guiding the management of elevated BP in the acute care setting, resulting in significant practice variation. Throughout this scientific statement, we use the terms acute care and inpatient to refer to care received in the emergency department and after admission to the hospital. Elevated inpatient BP is common and can manifest either as asymptomatic or with signs of new or worsening target-organ damage, a condition referred to as hypertensive emergency. Hypertensive emergency involves acute target-organ damage and should be treated swiftly, usually with intravenous antihypertensive medications, in a closely monitored setting. However, the risk-benefit ratio of initiating or intensifying antihypertensive medications for asymptomatic elevated inpatient BP is less clear. Despite this ambiguity, clinicians prescribe oral or intravenous antihypertensive medications in approximately one-third of cases of asymptomatic elevated inpatient BP. Recent observational studies have suggested potential harms associated with treating asymptomatic elevated inpatient BP, which brings current practice into question. Despite the ubiquity of elevated inpatient BPs, few position papers, guidelines, or consensus statements have focused on improving BP management in the acute care setting. Therefore, this scientific statement aims to synthesize the available evidence, provide suggestions for best practice based on the available evidence, identify evidence-based gaps in managing elevated inpatient BP (asymptomatic and hypertensive emergency), and highlight areas requiring further research.
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Haber EN, Sonti R, Simkovich SM, Pike CW, Boxley CL, Fong A, Weintraub WS, Cobb NK. Accuracy of Noninvasive Blood Pressure Monitoring in Critically Ill Adults. J Intensive Care Med 2024; 39:665-671. [PMID: 38215002 DOI: 10.1177/08850666231225173] [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] [Indexed: 01/14/2024]
Abstract
Background: Blood pressure (BP) is routinely invasively monitored by an arterial catheter in the intensive care unit (ICU). However, the available data comparing the accuracy of noninvasive methods to arterial catheters for measuring BP in the ICU are limited by small numbers and diverse methodologies. Purpose: To determine agreement between invasive arterial blood pressure monitoring (IABP) and noninvasive blood pressure (NIBP) in critically ill patients. Methods: This was a single center, observational study of critical ill adults in a tertiary care facility evaluating agreement (≤10% difference) between simultaneously measured IABP and NIBP. We measured clinical features at time of BP measurement inclusive of patient demographics, laboratory data, severity of illness, specific interventions (mechanical ventilation and dialysis), and vasopressor dose to identify particular clinical scenarios in which measurement agreement is more or less likely. Results: Of the 1852 critically ill adults with simultaneous IABP and NIBP readings, there was a median difference of 6 mm Hg in mean arterial pressure (MAP), interquartile range (1-12), P < .01. A logistic regression analysis identified 5 independent predictors of measurement discrepancy: increasing doses of norepinephrine (adjusted odds ratio [aOR] 1.10 [95% confidence interval, CI 1.08-1.12] P = .03 for every change in 5 µg/min), lower MAP value (aOR 0.98 [0.98-0.99] P < .01 for every change in 1 mm Hg), higher body mass index (aOR 1.04 [1.01-1.09] P = .01 for an increase in 1), increased patient age (aOR 1.31 [1.30-1.37] P < .01 for every 10 years), and radial arterial line location (aOR 1.74 [1.16-2.47] P = .04). Conclusions: There was broad agreement between IABP and NIBP in critically ill patients over a range of BPs and severity of illness. Several variables are associated with measurement discrepancy; however, their predictive capacity is modest. This may guide future study into which patients may specifically benefit from an arterial catheter.
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Affiliation(s)
- Erin N Haber
- Division of Pulmonary, Critical Care and Sleep Medicine, MedStar Georgetown University Hospital, Washington DC, USA
| | - Rajiv Sonti
- Division of Pulmonary, Critical Care and Sleep Medicine, MedStar Georgetown University Hospital, Washington DC, USA
| | - Suzanne M Simkovich
- Division of Pulmonary, Critical Care and Sleep Medicine, MedStar Georgetown University Hospital, Washington DC, USA
| | - C William Pike
- Georgetown University School of Medicine, Washington DC, USA
| | - Christian L Boxley
- Division of Healthcare Delivery Research, MedStar Health Research Institute, Washington DC, USA
| | - Allan Fong
- Division of Healthcare Delivery Research, MedStar Health Research Institute, Washington DC, USA
| | - William S Weintraub
- Division of Healthcare Delivery Research, MedStar Health Research Institute, Washington DC, USA
| | - Nathan K Cobb
- Division of Pulmonary, Critical Care and Sleep Medicine, MedStar Georgetown University Hospital, Washington DC, USA
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Benson B, Belle A, Lee S, Bassin BS, Medlin RP, Sjoding MW, Ward KR. Prediction of episode of hemodynamic instability using an electrocardiogram based analytic: a retrospective cohort study. BMC Anesthesiol 2023; 23:324. [PMID: 37737164 PMCID: PMC10515416 DOI: 10.1186/s12871-023-02283-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 09/14/2023] [Indexed: 09/23/2023] Open
Abstract
BACKGROUND Predicting the onset of hemodynamic instability before it occurs remains a sought-after goal in acute and critical care medicine. Technologies that allow for this may assist clinicians in preventing episodes of hemodynamic instability (EHI). We tested a novel noninvasive technology, the Analytic for Hemodynamic Instability-Predictive Indicator (AHI-PI), which analyzes a single lead of electrocardiogram (ECG) and extracts heart rate variability and morphologic waveform features to predict an EHI prior to its occurrence. METHODS Retrospective cohort study at a quaternary care academic health system using data from hospitalized adult patients between August 2019 and April 2020 undergoing continuous ECG monitoring with intermittent noninvasive blood pressure (NIBP) or with continuous intraarterial pressure (IAP) monitoring. RESULTS AHI-PI's low and high-risk indications were compared with the presence of EHI in the future as indicated by vital signs (heart rate > 100 beats/min with a systolic blood pressure < 90 mmHg or a mean arterial blood pressure of < 70 mmHg). 4,633 patients were analyzed (3,961 undergoing NIBP monitoring, 672 with continuous IAP monitoring). 692 patients had an EHI (380 undergoing NIBP, 312 undergoing IAP). For IAP patients, the sensitivity and specificity of AHI-PI to predict EHI was 89.7% and 78.3% with a positive and negative predictive value of 33.7% and 98.4% respectively. For NIBP patients, AHI-PI had a sensitivity and specificity of 86.3% and 80.5% with a positive and negative predictive value of 11.7% and 99.5% respectively. Both groups performed with an AUC of 0.87. AHI-PI predicted EHI in both groups with a median lead time of 1.1 h (average lead time of 3.7 h for IAP group, 2.9 h for NIBP group). CONCLUSIONS AHI-PI predicted EHIs with high sensitivity and specificity and within clinically significant time windows that may allow for intervention. Performance was similar in patients undergoing NIBP and IAP monitoring.
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Affiliation(s)
- Bryce Benson
- Fifth Eye Inc, 110 Miller Avenue, Suite 300, Ann Arbor, MI, 48104, USA
| | - Ashwin Belle
- Fifth Eye Inc, 110 Miller Avenue, Suite 300, Ann Arbor, MI, 48104, USA
| | - Sooin Lee
- Fifth Eye Inc, 110 Miller Avenue, Suite 300, Ann Arbor, MI, 48104, USA
| | - Benjamin S Bassin
- Department of Emergency Medicine, University of Michigan, 1500 East Medical Center Drive, Ann Arbor, MI, 48109-5301, USA
- Max Harry Weil Institute for Critical Care Research and Innovation, University of Michigan, NCRC 10-A103 2800 Plymouth Road, Ann Arbor, MI, 48109, USA
| | - Richard P Medlin
- Department of Emergency Medicine, University of Michigan, 1500 East Medical Center Drive, Ann Arbor, MI, 48109-5301, USA
- Max Harry Weil Institute for Critical Care Research and Innovation, University of Michigan, NCRC 10-A103 2800 Plymouth Road, Ann Arbor, MI, 48109, USA
| | - Michael W Sjoding
- Max Harry Weil Institute for Critical Care Research and Innovation, University of Michigan, NCRC 10-A103 2800 Plymouth Road, Ann Arbor, MI, 48109, USA
- Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, University of Michigan, 1500 East Medical Center Drive, Ann Arbor, MI, 48109-5642, USA
| | - Kevin R Ward
- Department of Emergency Medicine, University of Michigan, 1500 East Medical Center Drive, Ann Arbor, MI, 48109-5301, USA.
- Max Harry Weil Institute for Critical Care Research and Innovation, University of Michigan, NCRC 10-A103 2800 Plymouth Road, Ann Arbor, MI, 48109, USA.
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Tran QK, Gelmann D, Zahid M, Palmer J, Hollis G, Engelbrecht-Wiggans E, Alam Z, Matta AE, Hart E, Haase DJ. Arterial Monitoring in Hypertensive Emergencies: Significance for the Critical Care Resuscitation Unit. West J Emerg Med 2023; 24:763-773. [PMID: 37527376 PMCID: PMC10393462 DOI: 10.5811/westjem.59373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 04/21/2023] [Indexed: 08/03/2023] Open
Abstract
INTRODUCTION Blood pressure measurement is important for treating patients. It is known that there is a discrepancy between cuff blood pressure vs arterial blood pressure measurement. However few studies have explored the clinical significance of discrepancies between cuff (CPB) vs arterial blood pressure (ABP). Our study investigated whether differences in CBP and ABP led to change in management for patients with hypertensive emergencies and factors associated with this change. METHODS This prospective observational study included adult patients admitted between January 2019-May 2021 to a resuscitation unit with hypertensive emergencies. We defined clinical significance of discrepancies as a discrepancy between CBP and ABP that resulted in change of clinical management. We used stepwise multivariable logistic regression to measure associations between clinical factors and outcomes. RESULTS Of 212 patients we analyzed, 88 (42%) had change in management. Mean difference between CBP and ABP was 17 milligrams of mercury (SD 14). Increasing the existing rate of antihypertensive infusion occurred in 38 (44%) patients. Higher body mass index (odds ratio [OR] 1.04, 95% confidence Interval [CI] 1.0001-1.08, P-value <0.05) and history of peripheral arterial disease (OR 0.16, 95% CI 0.03-0.97, P-value <0.05) were factors associated with clinical significance of discrepancies. CONCLUSION Approximately 40% of hypertensive emergencies had a clinical significance of discrepancy warranting management change when arterial blood pressure was initiated. Further studies are necessary to confirm our observations and to investigate the benefit-risk ratio of ABP monitoring.
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Affiliation(s)
- Quincy K Tran
- University of Maryland School of Medicine, Department of Emergency Medicine, The Research Associate Program in Emergency Medicine and Critical Care, Baltimore, Maryland
| | | | - Manahel Zahid
- University of Maryland School of Medicine, Department of Emergency Medicine, The Research Associate Program in Emergency Medicine and Critical Care, Baltimore, Maryland
| | - Jamie Palmer
- University of Maryland School of Medicine, Baltimore, Maryland
| | - Grace Hollis
- University of Maryland School of Medicine, Department of Emergency Medicine, The Research Associate Program in Emergency Medicine and Critical Care, Baltimore, Maryland
| | | | - Zain Alam
- University of Maryland School of Medicine, Department of Emergency Medicine, The Research Associate Program in Emergency Medicine and Critical Care, Baltimore, Maryland
| | - Ann Elizabeth Matta
- University of Maryland School of Medicine, Program in Trauma, The R Adams Cowley Shock Trauma Center, Baltimore, Maryland
| | - Emily Hart
- University of Maryland School of Medicine, Program in Trauma, The R Adams Cowley Shock Trauma Center, Baltimore, Maryland
| | - Daniel J Haase
- University of Maryland School of Medicine, Program in Trauma, The R Adams Cowley Shock Trauma Center, Baltimore, Maryland
- Department of Emergency Medicine, University of Maryland School of Medicine, Baltimore, Maryland
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Samimi H, Dajani HR. A PPG-Based Calibration-Free Cuffless Blood Pressure Estimation Method Using Cardiovascular Dynamics. SENSORS (BASEL, SWITZERLAND) 2023; 23:4145. [PMID: 37112490 PMCID: PMC10146008 DOI: 10.3390/s23084145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/18/2023] [Accepted: 04/19/2023] [Indexed: 06/19/2023]
Abstract
Traditional cuff-based sphygmomanometers for measuring blood pressure can be uncomfortable and particularly unsuitable to use during sleep. A proposed alternative method uses dynamic changes in the pulse waveform over short intervals and replaces calibration with information from photoplethysmogram (PPG) morphology to provide a calibration-free approach using a single sensor. Results from 30 patients show a high correlation of 73.64% for systolic blood pressure (SBP) and 77.72% for diastolic blood pressure (DBP) between blood pressure estimated with the PPG morphology features and the calibration method. This suggests that the PPG morphology features could replace the calibration stage for a calibration-free method with similar accuracy. Applying the proposed methodology on 200 patients and testing on 25 new patients resulted in a mean error (ME) of -0.31 mmHg, a standard deviation of error (SDE) of 4.89 mmHg, a mean absolute error (MAE) of 3.32 mmHg for DBP and an ME of -4.02 mmHg, an SDE of 10.40 mmHg, and an MAE of 7.41 mmHg for SBP. These results support the potential for using a PPG signal for calibration-free cuffless blood pressure estimation and improving accuracy by adding information from cardiovascular dynamics to different methods in the cuffless blood pressure monitoring field.
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Kaplan E, Kadmon G, Nahum E, Alfandary H, Haskin O, Weissbach A. Blood pressure monitoring following kidney transplantation in children: a comparison of invasive and noninvasive measurements using Doppler as a benchmark technique. Pediatr Nephrol 2023; 38:1291-1298. [PMID: 35913567 DOI: 10.1007/s00467-022-05691-2] [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: 04/05/2022] [Revised: 07/07/2022] [Accepted: 07/07/2022] [Indexed: 11/28/2022]
Abstract
BACKGROUND Blood pressure (BP) monitoring following pediatric kidney transplantation is essential for optimizing graft perfusion. Differences between invasive BP and noninvasive BP (NIBP) measurements are sometimes considerable. We aimed to assess agreement between invasive BP and NIBP in pediatric patients after kidney transplantation and compare with measurements obtained by systolic Doppler with manual sphygmomanometer as a reference technique. METHODS A prospective, observational cohort study, of children aged 18 years or younger, admitted immediately following kidney transplantation to the pediatric intensive care unit of a tertiary, university-affiliated medical center, between May 2019 and June 2021. RESULTS Eighty-two paired simultaneous measurements of invasive BP, NIBP, and Doppler BP in 18 patients were compared. Patients were significantly hypertensive, with mean systolic NIBP above the 95th percentile (96 ± 6%). Systolic invasive BP measurements were significantly higher than NIBP (149 ± 20 vs. 136 ± 15 mmHg, p < 0.001). Substantial differences (≥ 20 mmHg) were found in 23% (95% CI 15-34%). Similar disagreement was found between systolic invasive and Doppler BP (150 ± 23 and 137 ± 17 mmHg, respectively, p < 0.001). In contrast, systolic NIBP was in good agreement with Doppler BP (135 ± 17 and 138 ± 18, respectively, p = 0.27). A moderate to strong correlation was found between higher systolic invasive BP and the difference to systolic Doppler BP (Spearman's ρ = 0.63, p < 0.001). CONCLUSIONS In children immediately following kidney transplantation, clinically significant disagreement was found between invasive and noninvasive BP measurements. Invasive BP values were significantly higher than those obtained by Doppler. Better agreement was found between NIBP and Doppler. These issues should be considered when interpreting BP measurements in this sensitive patient population. A higher resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- Eytan Kaplan
- Pediatric Intensive Care Unit, Schneider Children's Medical Center of Israel, 4920235, Petach Tikva, Israel. .,Sackler Faculty of Medicine, Tel Aviv University, 6997801, Tel Aviv, Israel.
| | - Gili Kadmon
- Pediatric Intensive Care Unit, Schneider Children's Medical Center of Israel, 4920235, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, 6997801, Tel Aviv, Israel
| | - Elhanan Nahum
- Pediatric Intensive Care Unit, Schneider Children's Medical Center of Israel, 4920235, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, 6997801, Tel Aviv, Israel
| | - Hadas Alfandary
- Sackler Faculty of Medicine, Tel Aviv University, 6997801, Tel Aviv, Israel.,Institute of Nephrology, Schneider Children's Medical Center of Israel, 4920235, Petach Tikva, Israel
| | - Orly Haskin
- Sackler Faculty of Medicine, Tel Aviv University, 6997801, Tel Aviv, Israel.,Institute of Nephrology, Schneider Children's Medical Center of Israel, 4920235, Petach Tikva, Israel
| | - Avichai Weissbach
- Pediatric Intensive Care Unit, Schneider Children's Medical Center of Israel, 4920235, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, 6997801, Tel Aviv, Israel
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Khan AA, Gupta PK, Baranwal AK, Jayashree M, Sahoo T. Comparison of Blood Pressure Measurements by Currently Available Multiparameter Monitors and Mercury Column Sphygmomanometer in Patients Admitted in Pediatric Intensive Care Unit. Indian J Crit Care Med 2023; 27:212-221. [PMID: 36960118 PMCID: PMC10028710 DOI: 10.5005/jp-journals-10071-24424] [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: 02/13/2023] [Accepted: 02/14/2023] [Indexed: 03/06/2023] Open
Abstract
Background The multiparameter monitor (MPM) is replacing mercury column sphygmomanometers (MCS) in acute care settings. However, data on the former's accuracy in critically ill children are scarce and mostly extrapolated from adults. We compared non-invasive blood pressure (NIBP) measurements by MPMs with MCS in pediatric intensive care unit (PICU). Patients Adequately sedated and hemodynamically stabilized children (age, 1-144 months) were prospectively enrolled. Materials and methods Three NIBP measurements were obtained from MCS (Diamond®, India) and MPM (Intellivue MX800® or Ultraview SL®) in rapid succession in the upper limb resting in supine position. Respective three measurements were averaged to obtain a paired set of NIBP readings, one each from MCS and MPM. Such readings were obtained thrice a day. NIBP readings were then compared, and agreement was assessed. Results From 39 children [median age (IQR), 30 (10-72) months], 1,690 sets of NIBP readings were obtained. A-third of readings were from infants and children >96 months, while 383 (22.6%) readings were from patients on inotropes. Multiparameter monitors gave significantly higher NIBP readings compared to MCS [median systolic blood pressure (SBP), 6.5 (6.4-6.7 mm Hg); diastolic blood pressure (DBP), 4.5 (4.3-4.6 mm Hg); mean arterial pressure (MAP), 5.3 (5.1-5.4 mm Hg); p < 0.05]. It was consistent across age, gender, and critical care characteristics. Multiparameter monitors overestimated SBP in 80% of readings beyond the maximal clinically acceptable difference (MCAD). Conclusions Non-invasive blood pressure readings from MCS and MPMs are not interchangeable; SBP was 6-7 mm Hg higher with the latter. Overestimation beyond MCAD was overwhelming. Caution is required while classifying systolic hypotension with MPMs. Confirmation with auscultatory methods is advisable. More studies are required to evaluate currently available MPMs in different pediatric age groups. How to cite this article Khan AA, Gupta PK, Baranwal AK, Jayashree M, Sahoo T. Comparison of Blood Pressure Measurements by Currently Available Multiparameter Monitors and Mercury Column Sphygmomanometer in Patients Admitted in Pediatric Intensive Care Unit. Indian J Crit Care Med 2023;27(3):212-221.
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Affiliation(s)
- Adil Ahmed Khan
- Department of Neonatology, All India Institute of Medical Sciences Jodhpur, Jodhpur, Rajasthan, India
| | - Pramod Kumar Gupta
- Department of Biostatistics, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Arun Kumar Baranwal
- Department of Pediatrics, Postgraduate Institute of Medical Education and Research, Chandigarh, India
- Arun Kumar Baranwal, Department of Pediatrics, Postgraduate Institute of Medical Education and Research, Chandigarh, India, Phone: +91 7766908325, e-mail:
| | - Muralidharan Jayashree
- Department of Pediatrics, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Tanushree Sahoo
- Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
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Mineroff J, Pokuri BSS, Ganapathysubramanian B, Krishnamurthy A. Optimization framework for patient-specific modeling under uncertainty. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING 2023; 39:e3665. [PMID: 36448192 DOI: 10.1002/cnm.3665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 09/12/2022] [Accepted: 11/07/2022] [Indexed: 06/16/2023]
Abstract
Estimating a patient-specific computational model's parameters relies on data that is often unreliable and ill-suited for a deterministic approach. We develop an optimization-based uncertainty quantification framework for probabilistic model tuning that discovers model inputs distributions that generate target output distributions. Probabilistic sampling is performed using a surrogate model for computational efficiency, and a general distribution parameterization is used to describe each input. The approach is tested on seven patient-specific modeling examples using CircAdapt, a cardiovascular circulatory model. Six examples are synthetic, aiming to match the output distributions generated using known reference input data distributions, while the seventh example uses real-world patient data for the output distributions. Our results demonstrate the accurate reproduction of the target output distributions, with a correct recreation of the reference inputs for the six synthetic examples. Our proposed approach is suitable for determining the parameter distributions of patient-specific models with uncertain data and can be used to gain insights into the sensitivity of the model parameters to the measured data.
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Affiliation(s)
- Joshua Mineroff
- Mechanical Engineering, Iowa State University, Ames, Iowa, USA
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Cuffless Blood Pressure Estimation Using Calibrated Cardiovascular Dynamics in the Photoplethysmogram. Bioengineering (Basel) 2022; 9:bioengineering9090446. [PMID: 36134991 PMCID: PMC9495658 DOI: 10.3390/bioengineering9090446] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 08/23/2022] [Accepted: 08/28/2022] [Indexed: 11/19/2022] Open
Abstract
An important means for preventing and managing cardiovascular disease is the non-invasive estimation of blood pressure. There is particular interest in developing approaches that provide accurate cuffless and continuous estimation of this important vital sign. This paper proposes a method that uses dynamic changes of the pulse waveform over short time intervals and calibrates the system based on a mathematical model that relates reflective PTT (R-PTT) to blood pressure. An advantage of the method is that it only requires collecting the photoplethysmogram (PPG) using one optical sensor, in addition to initial non-invasive measurements of blood pressure that are used for calibration. This method was applied to data from 30 patients, resulting in a mean error (ME) of 0.59 mmHg, a standard deviation of error (SDE) of 7.07 mmHg, and a mean absolute error (MAE) of 4.92 mmHg for diastolic blood pressure (DBP) and an ME of 2.52 mmHg, an SDE of 12.15 mmHg, and an MAE of 8.89 mmHg for systolic blood pressure (SBP). These results demonstrate the possibility of using the PPG signal for the cuffless continuous estimation of blood pressure based on the analysis of calibrated changes in cardiovascular dynamics, possibly in conjunction with other methods that are currently being researched.
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Yazer MH, Beckett A, Corley J, Devine DV, Studer NM, Taylor AL, Ward KR, Cap AP. Tips, tricks, and thoughts on the future of prehospital blood transfusions. Transfusion 2022; 62 Suppl 1:S224-S230. [PMID: 35748682 DOI: 10.1111/trf.16955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 03/21/2022] [Accepted: 03/22/2022] [Indexed: 11/29/2022]
Affiliation(s)
- Mark H Yazer
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Andrew Beckett
- Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Jason Corley
- Army Blood Program, US Army Medical Command, JBSA-FT Sam Houston, Fort Sam Houston, Texas, USA
| | | | - Nicholas M Studer
- U.S. Army Institute of Surgical Research, JBSA-FT Sam Houston, Fort Sam Houston, Texas, USA
| | - Audra L Taylor
- Armed Services Blood Program, Defense Health Agency, Falls Church, Virginia, USA
| | - Kevin R Ward
- Departments of Emergency Medicine and Biomedical Engineering, Max Harry Weil Institute for Critical Care Research and Innovation, University of Michigan, Ann Arbor, Michigan, USA
| | - Andrew P Cap
- U.S. Army Institute of Surgical Research, JBSA-FT Sam Houston, Fort Sam Houston, Texas, USA.,Department of Medicine, Uniformed Services University, Bethesda, Maryland, USA
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11
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Schmitzberger FF, Hall AE, Hughes ME, Belle A, Benson B, Ward KR, Bassin BS. Detection of Hemodynamic Status Using an Analytic Based on an Electrocardiogram Lead Waveform. Crit Care Explor 2022; 4:e0693. [PMID: 35620767 PMCID: PMC9116956 DOI: 10.1097/cce.0000000000000693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
OBJECTIVES Delayed identification of hemodynamic deterioration remains a persistent issue for in-hospital patient care. Clinicians continue to rely on vital signs associated with tachycardia and hypotension to identify hemodynamically unstable patients. A novel, noninvasive technology, the Analytic for Hemodynamic Instability (AHI), uses only the continuous electrocardiogram (ECG) signal from a typical hospital multiparameter telemetry monitor to monitor hemodynamics. The intent of this study was to determine if AHI is able to predict hemodynamic instability without the need for continuous direct measurement of blood pressure. DESIGN Retrospective cohort study. SETTING Single quaternary care academic health system in Michigan. PATIENTS Hospitalized adult patients between November 2019 and February 2020 undergoing continuous ECG and intra-arterial blood pressure monitoring in an intensive care setting. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS One million two hundred fifty-two thousand seven hundred forty-two 5-minute windows of the analytic output were analyzed from 597 consecutive adult patients. AHI outputs were compared with vital sign indications of hemodynamic instability (heart rate > 100 beats/min, systolic blood pressure < 90 mm Hg, and shock index of > 1) in the same window. The observed sensitivity and specificity of AHI were 96.9% and 79.0%, respectively, with an area under the curve (AUC) of 0.90 for heart rate and systolic blood pressure. For the shock index analysis, AHI's sensitivity was 72.0% and specificity was 80.3% with an AUC of 0.81. CONCLUSIONS The AHI-derived hemodynamic status appropriately detected the various gold standard indications of hemodynamic instability (hypotension, tachycardia and hypotension, and shock index > 1). AHI may provide continuous dynamic hemodynamic monitoring capabilities in patients who traditionally have intermittent static vital sign measurements.
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Affiliation(s)
| | - Ashley E Hall
- Department of Emergency Medicine, Michigan Medicine, Ann Arbor, MI
| | - Morgan E Hughes
- Department of Emergency Medicine, Michigan Medicine, Ann Arbor, MI
| | | | | | - Kevin R Ward
- Department of Emergency Medicine, Michigan Medicine, Ann Arbor, MI
- Department of Emergency Medicine, Division of Critical Care, Michigan Medicine, Ann Arbor, MI
- Max Harry Weil Institute for Critical Care Research and Innovation, Michigan Medicine, Ann Arbor, MI
| | - Benjamin S Bassin
- Department of Emergency Medicine, Michigan Medicine, Ann Arbor, MI
- Department of Emergency Medicine, Division of Critical Care, Michigan Medicine, Ann Arbor, MI
- Max Harry Weil Institute for Critical Care Research and Innovation, Michigan Medicine, Ann Arbor, MI
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12
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Standifird C, Wassermann M, Lauria MJ. Initiation of Invasive Arterial Pressure Monitoring by Critical Care Transport Crews. Air Med J 2022; 41:248-251. [PMID: 35307152 DOI: 10.1016/j.amj.2021.11.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 11/11/2021] [Accepted: 11/21/2021] [Indexed: 12/20/2022]
Abstract
Noninvasive blood pressure monitoring is convenient in the prehospital setting, but its use in the critically ill patient should be carefully considered given documented inaccuracies. Countless therapeutic patient interventions are based on blood pressure parameters, and the prehospital paramedic, nurse, and physician should strongly consider the use of invasive blood pressure monitoring, especially during critical care transport. Radial artery cannulation for arterial blood pressure monitoring is a safe and effective procedure that can reasonably be performed in the prehospital setting by both physicians and nonphysicians. Critical care transport teams should consider clinical guidelines that outline indications and training to safely implement this as a clinical skill.
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Affiliation(s)
| | - Michael Wassermann
- Lifeguard Air Emergency Services, Albuquerque, NM; Department of Emergency Medicine, University of New Mexico School of Medicine, Albuquerque, NM
| | - Michael J Lauria
- Lifeguard Air Emergency Services, Albuquerque, NM; Department of Emergency Medicine, University of New Mexico School of Medicine, Albuquerque, NM.
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13
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Agreement Between Non-Invasive (Oscillatory) and Invasive Intra-Arterial Blood Pressure in the Pediatric Cardiac Critical Care Unit. Indian Pediatr 2021. [PMID: 33772534 DOI: 10.1007/s13312-021-2260-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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14
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Herrera FC, Siaron KB, Stutzman SE, Wilson J, Olson D. Exploring the accuracy and precision of BP measurements. Nursing 2021; 51:47-50. [PMID: 34157002 DOI: 10.1097/01.nurse.0000751336.84200.7a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
ABSTRACT Accurate and precise BP measurements are crucial to clinical decision-making and interventions as healthcare professionals aim to prevent complications from hypertension, yet the literature provides no gold standard for measuring BP. This article discusses the additional research necessary to develop best practices and improve patient outcomes.
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Affiliation(s)
- Fatima Claire Herrera
- At Texas Woman's University in Dallas, Tex., Fatima Claire Herrera is a nursing student and Jennifer Wilson is a clinical professor. At the University of Texas Southwestern Medical Center in Dallas, Tex., Kathrina B. Siaron is a neuroscience ICU nurse, Sonja E. Stutzman is a clinical research manager, and DaiWai Olson is a professor of neurology
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15
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Babadağ K, Zaybak A. Comparing Intra-Arterial, Auscultatory, and Oscillometric Measurement Methods for Arterial Blood Pressure. Florence Nightingale Hemsire Derg 2021; 29:194-202. [PMID: 34263238 PMCID: PMC8245021 DOI: 10.5152/fnjn.2021.19103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 11/12/2020] [Indexed: 11/22/2022] Open
Abstract
AIM This study aimed to compare the measurement results of arterial blood pressure obtained through intra-arterial, auscultatory, and oscillometric methods. METHOD This prospective and descriptive study was conducted with 180 patients hospitalized in the intensive care units of cardiovascular surgery and anesthesia. Arterial blood pressures of the patients in the study were measured with 3 methods, and the mean arterial pressure values obtained by each method were analyzed to find out whether they were different or consistent. RESULTS The average systolic blood pressure value using the intra-arterial method was found to be 125.47 ± 21.39 mm Hg, and the average of diastolic blood pressure measurement obtained using the oscillometric method was the highest (73.91 ± 10.62 mm Hg). The highest correlation was seen between the arterial BP measurements of the intra-arterial and auscultatory methods (systolic [0.96] and diastolic [0.90]). According to the British and Irish Hypertension Society protocol, a very good agreement between the diastolic blood pressure values and a good agreement between the systolic blood pressure values were obtained. CONCLUSION The measurement results obtained through the auscultatory method more consistent with the results obtained through the intra-arterial method compared with those obtained using the oscillometric method.
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Affiliation(s)
- Keziban Babadağ
- Department of Pediatric Surgery, Ege University, Faculty of Medicine Hospital, İzmir, Turkey
| | - Ayten Zaybak
- Department of Fundamentals of Nursing, Ege University, Faculty of Medicine Hospital, İzmir, Turkey
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16
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A Continuous Cuffless Blood Pressure Estimation Using Tree-Based Pipeline Optimization Tool. Symmetry (Basel) 2021. [DOI: 10.3390/sym13040686] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
High blood pressure (BP) may lead to further health complications if not monitored and controlled, especially for critically ill patients. Particularly, there are two types of blood pressure monitoring, invasive measurement, whereby a central line is inserted into the patient’s body, which is associated with infection risks. The second measurement is cuff-based that monitors BP by detecting the blood volume change at the skin surface using a pulse oximeter or wearable devices such as a smartwatch. This paper aims to estimate the blood pressure using machine learning from photoplethysmogram (PPG) signals, which is obtained from cuff-based monitoring. To avoid the issues associated with machine learning such as improperly choosing the classifiers and/or not selecting the best features, this paper utilized the tree-based pipeline optimization tool (TPOT) to automate the machine learning pipeline to select the best regression models for estimating both systolic BP (SBP) and diastolic BP (DBP) separately. As a pre-processing stage, notch filter, band-pass filter, and zero phase filtering were applied by TPOT to eliminate any potential noise inherent in the signal. Then, the automated feature selection was performed to select the best features to estimate the BP, including SBP and DBP features, which are extracted using random forest (RF) and k-nearest neighbors (KNN), respectively. To train and test the model, the PhysioNet global dataset was used, which contains 32.061 million samples for 1000 subjects. Finally, the proposed approach was evaluated and validated using the mean absolute error (MAE). The results obtained were 6.52 mmHg for SBS and 4.19 mmHg for DBP, which show the superiority of the proposed model over the related works.
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17
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Yealy DM, Mohr NM, Shapiro NI, Venkatesh A, Jones AE, Self WH. Early Care of Adults With Suspected Sepsis in the Emergency Department and Out-of-Hospital Environment: A Consensus-Based Task Force Report. Ann Emerg Med 2021; 78:1-19. [PMID: 33840511 DOI: 10.1016/j.annemergmed.2021.02.006] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Indexed: 12/12/2022]
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18
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Keville MP, Gelmann D, Hollis G, Beher R, Raffman A, Tanveer S, Jones K, Parker BM, Haase DJ, Tran QK. Arterial or cuff pressure: Clinical predictors among patients in shock in a critical care resuscitation unit. Am J Emerg Med 2021; 46:109-115. [PMID: 33744746 DOI: 10.1016/j.ajem.2021.03.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 03/02/2021] [Accepted: 03/04/2021] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVES Blood pressure (BP) measurement is essential for managing patients with hypotension. There are differences between invasive arterial blood pressure (IABP) and noninvasive blood pressure (NIBP) measurements. However, the clinical applicability of these differences in patients with shock [need for vasopressor or serum lactate ≥ 4 millimole per liter (mmol/L)] has not been reported. This study investigated differences in IABP and NIBP as well as changes in clinical management in critically ill patients with shock. METHODS This was a retrospective study involving adult patients admitted to the Critical Care Resuscitation Unit (CCRU). Adult patients who received IABP upon admission between 01/01/2017-12/31/2017 with non-hypertensive diseases were eligible. The primary outcome, clinically relevant difference (CRD), was defined as difference of 10 mm of mercury (mmHg) between IABP and NIBP and change of blood pressure management according to goal mean arterial pressure (MAP) ≥ 65 mmHg. We performed forward stepwise multivariable logistic regression to measure associations. RESULTS Sample size calculation recommended 200 patients, and we analyzed 263. 121 (46%) patients had shock, 23 (9%) patients had CRD. Each mmol/L increase in serum lactate was associated with 11% higher likelihood of having CRD (OR 1.11, 95%CI 1.002-1.2). Peripheral artery disease and any kidney disease was significantly associated with higher likelihood of MAP difference ≥ 10 mmHg. CONCLUSION Approximately 9% of patients with shock had clinically-relevant MAP difference. Higher serum lactate was associated with higher likelihood of CRD. Until further studies are available, clinicians should consider using IABP in patients with shock.
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Affiliation(s)
- Meaghan P Keville
- The R Adams Cowley Shock Trauma Center, University of Maryland School of Medicine, Baltimore, MD 21201, United States of America.
| | - Dominique Gelmann
- The Research Associate Program in Emergency Medicine and Critical Care, Department of Emergency Medicine, University of Maryland School of Medicine, Baltimore, MD 21201., United States of America.
| | - Grace Hollis
- The Research Associate Program in Emergency Medicine and Critical Care, Department of Emergency Medicine, University of Maryland School of Medicine, Baltimore, MD 21201., United States of America.
| | - Richa Beher
- The Research Associate Program in Emergency Medicine and Critical Care, Department of Emergency Medicine, University of Maryland School of Medicine, Baltimore, MD 21201., United States of America.
| | - Alison Raffman
- The Research Associate Program in Emergency Medicine and Critical Care, Department of Emergency Medicine, University of Maryland School of Medicine, Baltimore, MD 21201., United States of America.
| | - Saman Tanveer
- The Research Associate Program in Emergency Medicine and Critical Care, Department of Emergency Medicine, University of Maryland School of Medicine, Baltimore, MD 21201., United States of America.
| | - Kevin Jones
- The R Adams Cowley Shock Trauma Center, University of Maryland School of Medicine, Baltimore, MD 21201, United States of America.
| | - Brandon M Parker
- The R Adams Cowley Shock Trauma Center, University of Maryland School of Medicine, Baltimore, MD 21201, United States of America
| | - Daniel J Haase
- The R Adams Cowley Shock Trauma Center, University of Maryland School of Medicine, Baltimore, MD 21201, United States of America; Department of Emergency Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, United States of America.
| | - Quincy K Tran
- The R Adams Cowley Shock Trauma Center, University of Maryland School of Medicine, Baltimore, MD 21201, United States of America; The Research Associate Program in Emergency Medicine and Critical Care, Department of Emergency Medicine, University of Maryland School of Medicine, Baltimore, MD 21201., United States of America; Department of Emergency Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, United States of America.
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19
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Moghadam MC, Masoumi E, Kendale S, Bagherzadeh N. Predicting hypotension in the ICU using noninvasive physiological signals. Comput Biol Med 2020; 129:104120. [PMID: 33387964 DOI: 10.1016/j.compbiomed.2020.104120] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 11/17/2020] [Accepted: 11/17/2020] [Indexed: 12/13/2022]
Abstract
Hypotension frequently occurs in Intensive Care Units (ICU), and its early prediction can improve the outcome of patient care. Trends observed in signals related to blood pressure (BP) are critical in predicting future events. Unfortunately, the invasive measurement of BP signals is neither comfortable nor feasible in all bed settings. In this study, we investigate the performance of machine-learning techniques in predicting hypotensive events in ICU settings using physiological signals that can be obtained noninvasively. We show that noninvasive mean arterial pressure (NIMAP) can be simulated by down-sampling the invasively measured MAP. This enables us to investigate the effect of BP measurement frequency on the algorithm's performance by training and testing the algorithm on a large dataset provided by the MIMIC III database. This study shows that having NIMAP information is essential for adequate predictive performance. The proposed predictive algorithm can flag hypotension with a sensitivity of 84%, positive predictive value (PPV) of 73%, and F1-score of 78%. Furthermore, the predictive performance of the algorithm improves by increasing the frequency of BP sampling.
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Affiliation(s)
| | - Ehsan Masoumi
- Department of Electrical Engineering and Computer Science, University of California Irvine, Irvine, CA, 92697, USA.
| | - Samir Kendale
- Beth Israel Deaconess Medical Center, Boston, MA, 02215, USA.
| | - Nader Bagherzadeh
- Department of Electrical Engineering and Computer Science, University of California Irvine, Irvine, CA, 92697, USA.
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20
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Strauss M, Leischik R, Jehn U, Padberg JS, Pistulli R, Kümpers P, Reinecke H. [The hypertensive emergency situation : Recommendations for initial drug therapy management]. Med Klin Intensivmed Notfmed 2020; 117:41-48. [PMID: 32940723 DOI: 10.1007/s00063-020-00728-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The hypertensive emergency situation is characterized by an acute-mostly life-threatening-blood pressure derailment with the risk of acute end organ damage. It is an acute manifestation of arterial hypertension, which manifests in a variety of symptoms. The etiology is in most cases long-term (chronic) hypertension as a result of low compliance or inadequate antihypertensive therapy. It can also occur as a first manifestation of arterial hypertension. It requires timely antihypertensive drug therapy, which should be initiated in an intensive or intermediate care unit. The choice of antihypertensive therapy regimen should be based on the underlying end organ damage. Fast-acting, easily controllable and intravenously administered substances should be preferred. The most commonly used substances (groups) are urapidil, nitroglycerin, beta blockers and short-acting calcium channel blockers. With a few exceptions, a deliberate, rapid reduction in blood pressure of no more than 20-25% of the initial value is sufficient for extracerebral causes. A subsequent systolic blood pressure target of 160/100 mm Hg should be aimed for within the next 2-6 h. An overly rapid drop in blood pressure can lead to reduced blood flow to the central nervous system due to changes in autoregulation. Exceptions to this rule are acute aortic dissection and flash pulmonary edema-in these cases, prompt blood pressure normalization should be achieved. The initial acute therapy should be followed by a more detailed investigation of the cause and a long-term therapy setting based on this.
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Affiliation(s)
- M Strauss
- Klinik für Kardiologie I: Koronare Herzerkrankung, Herzinsuffizienz und Angiologie, Universitätsklinikum Münster, Albert-Schweitzer-Campus 1, 48149, Münster, Deutschland. .,Klinik für Kardiologie, Lehrbereich Prävention und Gesundheitsförderung, Fakultät für Gesundheit, Universität Witten/Herdecke, Hagen, Deutschland.
| | - R Leischik
- Klinik für Kardiologie, Lehrbereich Prävention und Gesundheitsförderung, Fakultät für Gesundheit, Universität Witten/Herdecke, Hagen, Deutschland
| | - U Jehn
- Medizinische Klinik D, Allgemeine Innere Medizin und Notaufnahme sowie Nieren- und Hochdruckkrankheiten und Rheumatologie, Universitätsklinikum Münster, Münster, Deutschland
| | - J-S Padberg
- Klinik für Kardiologie I: Koronare Herzerkrankung, Herzinsuffizienz und Angiologie, Universitätsklinikum Münster, Albert-Schweitzer-Campus 1, 48149, Münster, Deutschland
| | - R Pistulli
- Klinik für Kardiologie I: Koronare Herzerkrankung, Herzinsuffizienz und Angiologie, Universitätsklinikum Münster, Albert-Schweitzer-Campus 1, 48149, Münster, Deutschland
| | - P Kümpers
- Medizinische Klinik D, Allgemeine Innere Medizin und Notaufnahme sowie Nieren- und Hochdruckkrankheiten und Rheumatologie, Universitätsklinikum Münster, Münster, Deutschland
| | - H Reinecke
- Klinik für Kardiologie I: Koronare Herzerkrankung, Herzinsuffizienz und Angiologie, Universitätsklinikum Münster, Albert-Schweitzer-Campus 1, 48149, Münster, Deutschland
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21
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Affiliation(s)
- Muddassir Mehmood
- Division of Cardiology, Department of Medicine, University of Tennessee Graduate School of Medicine, Knoxville, TN
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22
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A Comparison of Non-Invasive Blood Pressure Measurement Strategies with Intra-Arterial Measurement. Prehosp Disaster Med 2020; 35:516-523. [DOI: 10.1017/s1049023x20000916] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
AbstractIntroduction:It is difficult to obtain an accurate blood pressure (BP) measurement, especially in the prehospital environment. It is not known fully how various BP measurement techniques differ from one another.Study Objective:The study hypothesized that there are differences in the accuracy of various non-invasive blood pressure (NIBP) measurement strategies as compared to the gold standard of intra-arterial (IA) measurement.Methods:The study enrolled adult intensive care unit (ICU) patients with radial IA catheters placed to measure radial intra-arterial blood pressure (RIBP) as a part of their standard care at a large, urban, tertiary-care Level I trauma center. Systolic blood pressure (SBP) was taken by three different NIBP techniques (oscillometric, auscultated, and palpated) and compared to RIBP measurements. Data were analyzed using the paired t-test with dependent samples to detect differences between RIBP measurements and each NIBP method. The primary outcome was the difference in RIBP and NIBP measurement. There was also a predetermined subgroup analysis based on gender, body mass index (BMI), primary diagnosis requiring IA line placement, and current vasoactive medication use.Results:Forty-four patients were enrolled to detect a predetermined clinically significant difference of 5mmHg in SBP. The patient population was 63.6% male and 36.4% female with an average age of 58.4 years old. The most common primary diagnoses were septic shock (47.7%), stroke (13.6%), and increased intracranial pressure (ICP; 13.6%). Most patients were receiving some form of sedation (63.4%), while 50.0% were receiving vasopressor medication and 31.8% were receiving anti-hypertensive medication. When compared to RIBP values, only the palpated SBP values had a clinically significant difference (9.88mmHg less than RIBP; P < .001). When compared to RIBP, the oscillometric and auscultated SBP readings showed statistically but not clinically significant lower values. The palpated method also showed a clinically significant lower SBP reading than the oscillometric method (5.48mmHg; P < .001) and the auscultated method (5.06mmHg; P < .001). There was no significant difference between the oscillometric and auscultated methods (0.42mmHg; P = .73).Conclusion:Overall, NIBPs significantly under-estimated RIBP measurements. Palpated BP measurements were consistently lower than RIBP, which was statistically and clinically significant. These results raise concern about the accuracy of palpated BP and its pervasive use in prehospital care. The data also suggested that auscultated and oscillometric BP may provide similar measurements.
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23
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Park YS, Kim SH, Lee YS, Choi SH, Ku SW, Hwang GS. Real-Time Monitoring of Blood Pressure Using Digitalized Pulse Arrival Time Calculation Technology for Prompt Detection of Sudden Hypertensive Episodes During Laryngeal Microsurgery: Retrospective Observational Study. J Med Internet Res 2020; 22:e13156. [PMID: 32412413 PMCID: PMC7260662 DOI: 10.2196/13156] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Revised: 06/22/2019] [Accepted: 02/09/2020] [Indexed: 12/05/2022] Open
Abstract
Background Laryngeal microsurgery (LMS) is often accompanied by a sudden increase in blood pressure (BP) during surgery because of stimulation around the larynx. This sudden change in the hemodynamic status is not immediately reflected in a casual cuff-type measurement that takes intermittent readings every 3 to 5 min. Objective This study aimed to investigate the potential of pulse arrival time (PAT) as a marker for a BP surge, which usually occurs in patients undergoing LMS. Methods Intermittent measurements of BP and electrocardiogram (ECG) and photoplethysmogram (PPG) signals were recorded during LMS. PAT was defined as the interval between the R-peak on the ECG and the maximum slope on the PPG. Mean PAT values before and after BP increase were compared. PPG-related parameters and the correlations between changes in these variables were calculated. Results BP surged because of laryngoscopic manipulation (mean systolic BP [SBP] from 115.3, SD 21.4 mmHg, to 159.9, SD 25.2 mmHg; P<.001), whereas PAT decreased significantly (from mean 460.6, SD 51.9 ms, to 405.8, SD 50.1 ms; P<.001) in most of the cases. The change in SBP showed a significant correlation with the inverse of the PAT (r=0.582; P<.001). Receiver-operating characteristic curve analysis indicated that an increase of 11.5% in the inverse of the PAT could detect a 40% increase in SBP, and the area under the curve was 0.814. Conclusions During LMS, where invasive arterial catheterization is not always possible, PAT shows good correlation with SBP and may, therefore, have the potential to identify abrupt BP surges during laryngoscopic manipulations in a noninvasive manner.
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Affiliation(s)
- Yong-Seok Park
- Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Sung-Hoon Kim
- Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Yoon Se Lee
- Department of Otolaryngology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Seung-Ho Choi
- Department of Otolaryngology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Seung-Woo Ku
- Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Gyu-Sam Hwang
- Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
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24
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Predictors of clinically relevant differences between noninvasive versus arterial blood pressure. Am J Emerg Med 2020; 43:170-174. [PMID: 32169387 DOI: 10.1016/j.ajem.2020.02.044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 02/05/2020] [Accepted: 02/22/2020] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVE Blood pressure (BP) measurements are important for managing patients with hypertensive emergencies (HE). Previous studies showed that there was significant difference between IABP and NIBP but no information whether these differences changed management. Our study investigated the factors associated with the differences affecting BP management of patients with HE. METHODS This was a retrospective study involving adult patients admitted to a resuscitation unit. We screened all patients who received IABP upon admission between 06/01/2017 and 12/31/2017 as sample size calculation recommended 64 patients. Primary outcome was the clinical relevance of the difference of IABP vs. NIBP, which was defined as having both: a) difference of 10 mm of mercury (mmHg), and b) resulting in possible change of blood pressure managements according to treatment guidelines. We performed backward stepwise multivariable logistic regression to measure associations. RESULTS We analyzed 147 patients whose mean age was 69 (±16) years and included 69 (47%) patients with spontaneous intracerebral hemorrhage (sICH). Mean difference between IABP and NIBP was 21 (±16) mmHg while 41 (28%) patients who had difference affecting managements. In multivariable regression, sICH (Odd Ratios 13.5, 95%CI 2.3-79.5, p-value < 0.001) was significantly associated with clinically relevant difference between the two modalities of BP monitoring. CONCLUSIONS There was a large difference between IABP and NIBP among patients with hypertensive emergencies. Up to 30% of patients had clinically relevant differences. Patients with sICH were more likely to have differences affecting BP management. Further studies are needed to confirm our observation.
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25
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Armstrong MK, Schultz MG, Picone DS, Black JA, Dwyer N, Roberts-Thomson P, Sharman JE. Brachial and Radial Systolic Blood Pressure Are Not the Same. Hypertension 2019; 73:1036-1041. [PMID: 30905194 DOI: 10.1161/hypertensionaha.119.12674] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Radial intra-arterial blood pressure (BP) is sometimes used as the reference standard for validation of brachial cuff BP devices. Moreover, there is an emerging wearables market seeking to measure BP at the wrist. However, radial systolic BP may differ when compared with brachial; yet some authors have labeled these differences as a fictional Popeye phenomenon. Indeed, differences between brachial and radial systolic BP have never been accurately quantified, and this was the aim of this study. Intra-arterial BP was measured consecutively at the brachial and radial artery in 180 participants undergoing coronary angiography (aged 61±10 years; 69% men). On average, radial systolic BP was 5.5 mm Hg higher than brachial systolic BP. Only 43% of participants had radial systolic BP within ±5 mm Hg of brachial. Additionally, 46%, 19%, and 13% of participants had radial systolic BP >5, between 5 and 10, and between 10 and 15 mm Hg higher than brachial respectively. A further 14% of participants had radial systolic BP >15 mm Hg higher than brachial, representing the so-called Popeye phenomenon. Finally, 11% of participants had radial systolic BP >5 mm Hg lower than brachial. In conclusion, radial systolic BP is not representative of brachial systolic BP, with most participants having a radial systolic BP >5 mm Hg higher than brachial and many with differences >15 mm Hg. Therefore, validation testing of BP devices utilizing intra-arterial BP as the reference standard should use intra-arterial BP measured at the same site as the brachial cuff or wearable device.
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Affiliation(s)
- Matthew K Armstrong
- From the Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia (M.K.A., M.G.S., D.S.P., J.E.S.)
| | - Martin G Schultz
- From the Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia (M.K.A., M.G.S., D.S.P., J.E.S.)
| | - Dean S Picone
- From the Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia (M.K.A., M.G.S., D.S.P., J.E.S.)
| | - J Andrew Black
- Department of Cardiology, Royal Hobart Hospital, Hobart, Australia (J.A.B., N.D., P.R.-T.)
| | - Nathan Dwyer
- Department of Cardiology, Royal Hobart Hospital, Hobart, Australia (J.A.B., N.D., P.R.-T.)
| | - Philip Roberts-Thomson
- Department of Cardiology, Royal Hobart Hospital, Hobart, Australia (J.A.B., N.D., P.R.-T.)
| | - James E Sharman
- From the Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia (M.K.A., M.G.S., D.S.P., J.E.S.)
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26
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Affiliation(s)
- Aldo J Peixoto
- From the Department of Internal Medicine, Section of Nephrology, Yale School of Medicine, and the Hypertension Program, Yale New Haven Hospital Heart and Vascular Center, New Haven, CT
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27
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Affiliation(s)
- Daniel W Jones
- From the Department of Medicine, Mississippi Center for Obesity Research, University of Mississippi Medical Center, Jackson, MS
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28
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Liu Y, Manners J, Bittar Y, Chou SHY, Gopalakrishnan V. Towards precision critical care management of blood pressure in hemorrhagic stroke patients using dynamic linear models. PLoS One 2019; 14:e0220283. [PMID: 31381589 PMCID: PMC6681940 DOI: 10.1371/journal.pone.0220283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Accepted: 07/14/2019] [Indexed: 11/18/2022] Open
Abstract
Finding optimal blood pressure (BP) target and BP treatment after acute ischemic or hemorrhagic strokes is an area of controversy and a significant unmet need in the critical care of stroke victims. Numerous large prospective clinical trials have been done to address this question but have generated neutral or conflicting results. One major limitation that may have contributed to so many neutral or conflicting clinical trial results is the "one-size fit all" approach to BP targets, while the optimal BP target likely varies between individuals. We address this problem with the Acute Intervention Model of Blood Pressure (AIM-BP) framework: an individualized, human interpretable model of BP and its control in the acute care setting. The framework consists of two components: one, a model of BP homeostasis and the various effects that perturb it; and two, a parameter estimator that can learn clinically important model parameters on a patient by patient basis. By estimating the parameters of the AIM-BP model for a given patient, the effectiveness of antihypertensive medication can be quantified separately from the patient's spontaneous BP trends. We hypothesize that the AIM-BP is a sufficient framework for estimating parameters of a homeostasis perturbation model of a stroke patient's BP time course and the AIM-BP parameter estimator can do so as accurately and consistently as a state-of-the-art maximum likelihood estimation method. We demonstrate that this is the case in a proof of concept of the AIM-BP framework, using simulated clinical scenarios modeled on stroke patients from real world intensive care datasets.
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Affiliation(s)
- Yuzhe Liu
- Department of Biomedical Informatics, University of Pittsburgh, Pittsburgh, PA, United States of America
| | - Jody Manners
- Department of Neurology, Naval Medical Center Portsmouth, Portsmouth, VA, United States of America
| | - Yazan Bittar
- Lewis Katz School of Medicine, Temple University, Philadelphia, PA, United States of America
| | - Sherry H-Y. Chou
- Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States of America
- Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States of America
- Department of Neurosurgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States of America
| | - Vanathi Gopalakrishnan
- Department of Biomedical Informatics, University of Pittsburgh, Pittsburgh, PA, United States of America
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Malinowski CM, Cameron AI, Burnside WM, West SE, Nunamaker EA. Butorphanol-Azaperone-Medetomidine for the Immobilization of Rhesus Macaques ( Macaca mulatta). JOURNAL OF THE AMERICAN ASSOCIATION FOR LABORATORY ANIMAL SCIENCE 2019; 58:346-355. [PMID: 30935442 DOI: 10.30802/aalas-jaalas-18-000088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Maximizing animal wellbeing by minimizing drug-related side effects is a key consideration when choosing pharmaceutical agents for chemical restraint in nonhuman primates. One drug combination that may promote this ideology is butorphanol (27.3 mg/mL), azaperone (9.1 mg/mL), and medetomidine (10.9 mg/mL; BAM). Based on results from a pilot study, 2 doses of BAM (16 and 24 μL/kg IM) were compared in healthy, 3-y-old rhesus macaques. Physiologic parameters and anesthetic quality were assessed and recorded every 5 min. Experimental endpoints were established for hypoxemia (85% or less peripheral oxygen saturation with oxygen supplementation), pulse rate (80 bpm or less for 2 consecutive readings), mean arterial pressure (MAP; 50 mm Hg or less), and hypothermia (97 °F or less); if any endpoint was achieved, medetomidine was reversed by using atipamezole (0.22 mg/kg IM). Both BAM doses resulted in immobilization of all animals with no clinically significant differences between groups. All animals initially exhibited hypoxemia that resolved with oxygen supplementation. Regardless of dose, most macaques (71%) reached established experimental endpoints for bradycardia (62 to 80 bpm) or hypotension (44 to 50 mm Hg MAP). Given the results of this study, our recommendation regarding the use of 16- or 24-μL/kg BAM for immobilizing rhesus macaques is dependent on caution regarding cardiopulmonary parameters and the provision of supplemental oxygen.
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Affiliation(s)
| | - Angus I Cameron
- School of Pure and Applied Sciences, Florida SouthWestern State College, LaBelle, Florida
| | | | - Sylvia E West
- Animal Care Services, University of Florida, Gainesville, Florida
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Marouane A, Cornelissen EAM, Nusmeier A, Bootsma-Robroeks CMHHT. Oscillometric and intra-arterial blood pressure in children post-kidney transplantation: Is invasive blood pressure measurement always needed? Pediatr Transplant 2019; 23:e13309. [PMID: 30362265 DOI: 10.1111/petr.13309] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 09/07/2018] [Accepted: 09/19/2018] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Blood pressure (BP) monitoring in children immediately after kidney transplantation is ideally performed with an arterial line. Accurate measurement of BP is necessary for optimal management. However, during the first days postoperative, the arterial line is removed and BP measurement is switched to a non-invasive device. The aim of this study was to determine the accuracy and reliability of the automated oscillometric device compared to invasive arterial BP (IBP) monitoring in patients after renal transplantation in pediatric intensive care unit (PICU). METHOD We analyzed all simultaneously measured BPs in children with a kidney transplant in the Amalia Children's Hospital Radboud University Medical Center between January 1, 2012, and January 1, 2016. BP measurements were performed according to the hospital protocol. Agreement between invasive and non-invasive methods was assessed using Bland-Altman plots. RESULTS A total of 29 patients were included in this retrospective study. The majority of children were male (59%), and median age was 11 years (range 1-17 years). Totally, 80 BP measurements were recorded during the first days post-kidney transplantation. The correlation coefficients (R) of systolic, diastolic, and MAP of non-invasive (NIBP) and IBP measurements were 0.84, 0.76, and 0.77, respectively (P < 0.01). Overall, the average MAP (7.5 ± 1.2 mm Hg; P < 0.05) NIBP values were lower compared to IBP. In hypertensive patients, MAP (10.4 ± 10.0 mm Hg; P < 0.05) BP values were significantly lower using the NIBP device. Clinically relevant difference of >10 mm Hg was found in 51% (41/80) of measurements and mainly observed in hypertensive measurements. CONCLUSIONS IBP measurement is considered the golden standard for monitoring BP in patients immediately after kidney transplantation. NIBP values showed a good agreement with invasive reading, but the variability of NIBP mainly in hypertensive patients is high as it is the number of clinically relevant differences to IBP. We conclude that IBP remains the golden standard to monitor BP in children directly postoperatively.
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Affiliation(s)
- Abderrahim Marouane
- Pediatric Nephrology Department, Radboud University Medical Center, Amalia Children's Hospital, Nijmegen, The Netherlands
| | - Elisabeth A M Cornelissen
- Pediatric Nephrology Department, Radboud University Medical Center, Amalia Children's Hospital, Nijmegen, The Netherlands
| | - Anneliese Nusmeier
- Pediatric Intensive Care Unit, Radboud University Medical Center, Amalia Children's Hospital, Nijmegen, The Netherlands
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Abstract
Background Brachial–ankle pulse wave velocity (baPWV) and cardio-ankle vascular index (CAVI) are indices of arterial stiffness, and several studies have used these indices. However, there is no comprehensive review of these parameters in the prognostic significance. Methods The aim of this study was to review the articles exploring the prognostic significance of these parameters. Articles demonstrating independent significance after multivariate analysis on the Cox proportional hazards model were defined as “successful.” The success rate was compared using Fisher’s exact test. In addition, multivariate logistic regression analysis was performed to explore the independent determinants of the success of prognostic prediction. Results The success rate of the baPWV articles (65.7% [46/70]) tended to be higher than that of the CAVI articles (40.0% [6/15]; P=0.083). Multivariate analysis demonstrated that log (number of patients) (OR 11.20, 95% CI 2.45–51.70, P=0.002) and dialysis population (OR 0.28, 95% CI 0.08–0.94, P=0.039) were positive and negative independent determinants of the success of prognostic prediction, respectively. In addition, after redefining two studies as the absence of arteriosclerosis obliterans (ASO) exclusion, baPWV (OR 3.36, 95% CI 0.86–13.20, P=0.083) and the existence of exclusion criteria of ASO (OR 3.08, 95% CI 0.96–9.93, P=0.060) exhibited statistical tendency in the multivariate analysis. Conclusion This study demonstrated that the number of study participants and dialysis population were the independent determinants of the success of prognostic prediction. This study also showed the importance of exclusion criteria of ASO when using these indices. In addition, a prospective large-scale study to confirm the superiority in the prognostic prediction of these indices is warranted.
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Affiliation(s)
- Dai Ato
- Gakujutsu Shien Co., Ltd, Tokyo, Japan,
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Saherwala AA, Stutzman SE, Osman M, Kalia J, Figueroa SA, Olson DM, Aiyagari V. Correlation of Noninvasive Blood Pressure and Invasive Intra-arterial Blood Pressure in Patients Treated with Vasoactive Medications in a Neurocritical Care Unit. Neurocrit Care 2018; 28:265-272. [DOI: 10.1007/s12028-018-0521-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Comparison of noninvasive blood pressure monitoring with invasive arterial pressure monitoring in medical ICU patients with septic shock. Blood Press Monit 2018; 22:202-207. [PMID: 28379881 DOI: 10.1097/mbp.0000000000000258] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE In the critically ill, the insertion of peripheral arterial catheters to monitor hemodynamics is a low-risk procedure, but carries the potential for complications. This study was designed to compare invasive and noninvasive blood pressure measurements in patients with septic shock in a medical ICU. PATIENTS AND METHODS We carried out a prospective observational study of patients admitted with septic shock and a radially inserted peripheral arterial catheter in the medical ICU with 31 adult patients who underwent four pairs of simultaneous noninvasive and invasive blood pressure measurements (124 comparisons), with the invasive blood pressure taken as the gold standard. Agreements between invasive and noninvasive blood pressure methods were assessed using Bland-Altman analysis, and clinical significance was determined by the European Society of Hypertension criteria. RESULTS In all patients, noninvasive systolic (P=0.0385), diastolic (P<0.0001), and mean arterial pressures (P<0.0001) did correlate statistically with invasive measurements; however, all noninvasive pressure measurements did not correlate clinically according to the European Society of Hypertension criteria. CONCLUSION In our patients admitted to the medical ICU with septic shock, noninvasive blood pressure monitoring did not clinically correlate with invasive blood pressure measurements.
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Zrimšek P, Sredenšek J, Vengušt M, Seliškar A. Evaluation of oscillometric blood pressure monitor BLT M9000 VET in anaesthetised healthy adult dogs. J Small Anim Pract 2018; 59:474-479. [PMID: 29318621 DOI: 10.1111/jsap.12811] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2017] [Revised: 11/04/2017] [Accepted: 11/13/2017] [Indexed: 11/30/2022]
Abstract
To examine agreement in anaesthetised dogs between invasive blood pressure measurements and measurements obtained with an oscillometric blood pressure monitor. MATERIALS AND METHODS Paired invasive and oscillometric measurements were taken in 24 dogs every 5 minutes during anaesthesia (9 to 37 measurements per dog). Agreement between measurement methods was explored using Bland-Altman plots. To determine the accuracy of the oscillometric measurements, the results were compared with the guidelines recommended by the American College of Veterinary Internal Medicine and the Association for the Advancement of Medical Instrumentation. RESULTS In total, 493 paired readings were obtained: 98·6% of oscillometric readings were successful. Biases (±standard deviation) for oscillometric readings of systolic arterial blood pressure and mean arterial blood pressure were 2·1 (±11·5) and -9·8 (±7·6) mm Hg, indicating slight over- and under-estimation, respectively, versus invasive measurements. More than 50% and 80% of systolic arterial and mean arterial pressure measurements were within 10 and 20 mmHg of invasively measured values, respectively. A large negative bias (-14·1 ±9·2 mmHg) against invasive measurements revealed that the oscillometric measures of diastolic arterial blood pressure measurements were under-estimated. CLINICAL SIGNIFICANCE In healthy adult anaesthetised dogs, this oscillometric monitor met the American College of Veterinary Internal Medicine requirements for systolic arterial and mean arterial pressure measurement but failed to meet the requirements for the measurement of diastolic arterial pressure.
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Affiliation(s)
- P Zrimšek
- Institute for Preclinical Sciences, Veterinary Faculty, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - J Sredenšek
- Small Animal Clinic, Veterinary Faculty, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - M Vengušt
- Veterinary Faculty, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - A Seliškar
- Small Animal Clinic, Veterinary Faculty, University of Ljubljana, 1000 Ljubljana, Slovenia
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Mix DS, Yang L, Johnson CC, Couper N, Zarras B, Arabadjis I, Trakimas LE, Stoner MC, Day SW, Richards MS. Detecting Regional Stiffness Changes in Aortic Aneurysmal Geometries Using Pressure-Normalized Strain. ULTRASOUND IN MEDICINE & BIOLOGY 2017; 43:2372-2394. [PMID: 28728780 PMCID: PMC5562537 DOI: 10.1016/j.ultrasmedbio.2017.06.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 04/26/2017] [Accepted: 06/02/2017] [Indexed: 06/07/2023]
Abstract
Transabdominal ultrasound elasticity imaging could improve the assessment of rupture risk for abdominal aortic aneurysms by providing information on the mechanical properties and stress or strain states of vessel walls. We implemented a non-rigid image registration method to visualize the pressure-normalized strain within vascular tissues and adapted it to measure total strain over an entire cardiac cycle. We validated the algorithm's performance with both simulated ultrasound images with known principal strains and anatomically accurate heterogeneous polyvinyl alcohol cryogel vessel phantoms. Patient images of abdominal aortic aneurysm were also used to illustrate the clinical feasibility of our imaging algorithm and the potential value of pressure-normalized strain as a clinical metric. Our results indicated that pressure-normalized strain could be used to identify spatial variations in vessel tissue stiffness. The results of this investigation were sufficiently encouraging to warrant a clinical study measuring abdominal aortic pressure-normalized strain in a patient population with aneurysmal disease.
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Affiliation(s)
- Doran S Mix
- Division of Vascular Surgery, Department of Surgery, University of Rochester Medical Center, Rochester, New York, USA; Department of Biomedical Engineering, Rochester Institute of Technology, Rochester, New York, USA.
| | - Ling Yang
- Department of Biomedical Engineering, University of Rochester, Rochester, New York, USA
| | - Camille C Johnson
- Department of Biomedical Engineering, Rochester Institute of Technology, Rochester, New York, USA
| | - Nathan Couper
- Division of Vascular Surgery, Department of Surgery, University of Rochester Medical Center, Rochester, New York, USA; Department of Biomedical Engineering, University of Rochester, Rochester, New York, USA
| | - Ben Zarras
- Department of Biomedical Engineering, University of Rochester, Rochester, New York, USA
| | - Isaac Arabadjis
- Department of Biomedical Engineering, Rochester Institute of Technology, Rochester, New York, USA
| | - Lauren E Trakimas
- Division of Vascular Surgery, Department of Surgery, University of Rochester Medical Center, Rochester, New York, USA
| | - Michael C Stoner
- Division of Vascular Surgery, Department of Surgery, University of Rochester Medical Center, Rochester, New York, USA
| | - Steven W Day
- Department of Biomedical Engineering, Rochester Institute of Technology, Rochester, New York, USA
| | - Michael S Richards
- Division of Vascular Surgery, Department of Surgery, University of Rochester Medical Center, Rochester, New York, USA; Department of Biomedical Engineering, Rochester Institute of Technology, Rochester, New York, USA
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Systolic peak foot-to-apex time interval, a novel oscillometric technique for systolic blood pressure measurement. J Hypertens 2017; 35:1002-1010. [PMID: 28099195 PMCID: PMC5378056 DOI: 10.1097/hjh.0000000000001252] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Background: Noninvasive blood pressure (BP) measurement is essential for the study of human physiology but automatic oscillometric devices only estimate SBP and DBP using various, undisclosed algorithms, precluding standardization and interchangeability. We propose a novel approach by tracking, during pneumatic cuff deflation, the time interval from the foot to the apex of the systolic peak of the oscillometric signal, which reaches a maximum concomitant with the first Korotkoff sound. Method: In 145 study participants and patients (group 1), we measured the systolic brachial artery blood pressure by Korotkoff sound recording, conventional oscillometry, and our fully automated systolic peak foot-to-apex time interval (SFATI) technique. In 35 other patients (group 2), we compared SFATI with intra-arterial measurement. Results: In group 1, the concordance correlation coefficient was 0.989 and 0.984 between SFATI and Korotkoff sounds, 0.884 and 0.917 between oscillometry and Korotkoff sounds, and 0.882 and 0.919 between SFATI and oscillometry, respectively, on the left and right arm. In group 2, it was 0.72 between SFATI and intra-arterial measurement, 0.67 between oscillometry and intra-arterial measurement, and 0.92 between SFATI and Korotkoff sounds. In 40 study participants, the reproducibility study yielded a concordance coefficient of 0.95 for SFATI and 0.94 for Korotkoff sounds. Conclusion: SFATI BP measurement shows an excellent concordance with the auscultatory technique, offering a major improvement over current oscillometric techniques and allowing standardization.
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MacEwen C, Sutherland S, Daly J, Pugh C, Tarassenko L. Relationship between Hypotension and Cerebral Ischemia during Hemodialysis. J Am Soc Nephrol 2017; 28:2511-2520. [PMID: 28270412 DOI: 10.1681/asn.2016060704] [Citation(s) in RCA: 113] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 01/23/2017] [Indexed: 12/18/2022] Open
Abstract
The relationship between BP and downstream ischemia during hemodialysis has not been characterized. We studied the dynamic relationship between BP, real-time symptoms, and cerebral oxygenation during hemodialysis, using continuous BP and cerebral oxygenation measurements prospectively gathered from 635 real-world hemodialysis sessions in 58 prevalent patients. We examined the relationship between BP and cerebral ischemia (relative drop in cerebral saturation >15%) and explored the lower limit of cerebral autoregulation at patient and population levels. Furthermore, we estimated intradialytic exposure to cerebral ischemia and hypotension for each patient, and entered these values into multivariate models predicting change in cognitive function. In all, 23.5% of hemodialysis sessions featured cerebral ischemia; 31.9% of these events were symptomatic. Episodes of hypotension were common, with mean arterial pressure falling by a median of 22 mmHg (interquartile range, 14.3-31.9 mmHg) and dropping below 60 mmHg in 24% of sessions. Every 10 mmHg drop from baseline in mean arterial pressure associated with a 3% increase in ischemic events (P<0.001), and the incidence of ischemic events rose rapidly below an absolute mean arterial pressure of 60 mmHg. Overall, however, BP poorly predicted downstream ischemia. The lower limit of cerebral autoregulation varied substantially (mean 74.1 mmHg, SD 17.6 mmHg). Intradialytic cerebral ischemia, but not hypotension, correlated with decreased executive cognitive function at 12 months (P=0.03). This pilot study demonstrates that intradialytic cerebral ischemia occurs frequently, is not easily predicted from BP, and may be clinically significant.
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Affiliation(s)
- Clare MacEwen
- Oxford Kidney Unit, Oxford University Hospitals National Health Service Trust, Oxford, United Kingdom; .,Institute of Biomedical Engineering, Department of Engineering Science, and
| | - Sheera Sutherland
- Oxford Kidney Unit, Oxford University Hospitals National Health Service Trust, Oxford, United Kingdom
| | - Jonathan Daly
- Institute of Biomedical Engineering, Department of Engineering Science, and
| | - Christopher Pugh
- Oxford Kidney Unit, Oxford University Hospitals National Health Service Trust, Oxford, United Kingdom.,Nuffield Department of Medicine, Oxford University, Oxford, United Kingdom
| | - Lionel Tarassenko
- Institute of Biomedical Engineering, Department of Engineering Science, and
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Kallioinen N, Hill A, Horswill MS, Ward HE, Watson MO. Sources of inaccuracy in the measurement of adult patients' resting blood pressure in clinical settings: a systematic review. J Hypertens 2017; 35:421-441. [PMID: 27977471 PMCID: PMC5278896 DOI: 10.1097/hjh.0000000000001197] [Citation(s) in RCA: 198] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Revised: 09/13/2016] [Accepted: 11/05/2016] [Indexed: 12/12/2022]
Abstract
BACKGROUND To interpret blood pressure (BP) data appropriately, healthcare providers need to be knowledgeable of the factors that can potentially impact the accuracy of BP measurement and contribute to variability between measurements. METHODS A systematic review of studies quantifying BP measurement inaccuracy. Medline and CINAHL databases were searched for empirical articles and systematic reviews published up to June 2015. Empirical articles were included if they reported a study that was relevant to the measurement of adult patients' resting BP at the upper arm in a clinical setting (e.g. ward or office); identified a specific source of inaccuracy; and quantified its effect. Reference lists and reviews were searched for additional articles. RESULTS A total of 328 empirical studies were included. They investigated 29 potential sources of inaccuracy, categorized as relating to the patient, device, procedure or observer. Significant directional effects were found for 27; however, for some, the effects were inconsistent in direction. Compared with true resting BP, significant effects of individual sources ranged from -23.6 to +33 mmHg SBP and -14 to +23 mmHg DBP. CONCLUSION A single BP value outside the expected range should be interpreted with caution and not taken as a definitive indicator of clinical deterioration. Where a measurement is abnormally high or low, further measurements should be taken and averaged. Wherever possible, BP values should be recorded graphically within ranges. This may reduce the impact of sources of inaccuracy and reduce the scope for misinterpretations based on small, likely erroneous or misleading, changes.
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Affiliation(s)
- Noa Kallioinen
- School of Psychology, The University of Queensland, St. Lucia
| | - Andrew Hill
- School of Psychology, The University of Queensland, St. Lucia
- Clinical Skills Development Service, Metro North Hospital and Health Service, Herston
| | | | - Helen E. Ward
- The Prince Charles Hospital, Metro North Hospital and Health Service, Chermside
| | - Marcus O. Watson
- School of Psychology, The University of Queensland, St. Lucia
- Clinical Skills Development Service, Metro North Hospital and Health Service, Herston
- School of Medicine, The University of Queensland Mayne Medical School, Herston, Queensland, Australia
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Sheshadri V, Tiwari AK, Nagappa M, Venkatraghavan L. Accuracy in Blood Pressure Monitoring: The Effect of Noninvasive Blood Pressure Cuff Inflation on Intra-arterial Blood Pressure Values. Anesth Essays Res 2017; 11:169-173. [PMID: 28298779 PMCID: PMC5341678 DOI: 10.4103/0259-1162.181430] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
CONTEXT Both invasive and noninvasive blood pressure (invasive arterial blood pressure [IABP] and noninvasive BP [NIBP]) monitors are used perioperatively; however, they often produce different values. The reason for this discrepancy is not clear, and it is possible that the act of cuff inflation itself might affect the IABP values, especially with the recurrent cycling of NIBP cuff. AIM The aim of this study was to determine the effect of ipsilateral NIBP cuff inflation on the contralateral IABP values. SETTINGS AND DESIGNS Prospective, observational study. MATERIALS AND METHODS One hundred consecutive patients were studied. The NIBP device was set to cycle every 5 min for a total of 6 times. During each cuff inflation cycle, changes in IABP values from the arterial line in the contralateral arm were recorded. A total of 582 measurements were included for data analysis. STATISTICAL ANALYSIS Chi-square, paired t-test, analysis of variance. RESULTS Mean (± standard deviation) changes in systolic BP (SBP), diastolic BP, and mean BP with cuff inflation were 6.7 ± 5.9, 2.6 ± 4.0, and 4.0 ± 3.9 mmHg, respectively. We observed an increase of 0-10 mmHg in SBP in majority (73.4%) of cuff inflations. The changes in IABP did not differ between the patients with or without hypertension or with the baseline SBP. CONCLUSIONS This study showed that there is a transient reactive rise in IABP values with NIBP cuff inflation. This is important information in the perioperative and intensive care settings, where both these measurement techniques are routinely used. The exact mechanism for this effect is not known but may be attributed to the pain and discomfort from cuff inflation.
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Affiliation(s)
- Veena Sheshadri
- Department of Anesthesia, Toronto Western Hospital, Toronto, Canada
| | | | - Mahesh Nagappa
- Department of Anesthesia and Perioperative Medicine, University of Western Ontario, Ontario, Canada
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Wu H, Wang B, Zhu X, Chu G, Zhang Z. A new automatic blood pressure kit auscultates for accurate reading with a smartphone: A diagnostic accuracy study. Medicine (Baltimore) 2016; 95:e4538. [PMID: 27512876 PMCID: PMC4985331 DOI: 10.1097/md.0000000000004538] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The widely used oscillometric automated blood pressure (BP) monitor was continuously questioned on its accuracy. A novel BP kit named Accutension which adopted Korotkoff auscultation method was then devised. Accutension worked with a miniature microphone, a pressure sensor, and a smartphone. The BP values were automatically displayed on the smartphone screen through the installed App. Data recorded in the phone could be played back and reconfirmed after measurement. They could also be uploaded and saved to the iCloud. The accuracy and consistency of this novel electronic auscultatory sphygmomanometer was preliminarily verified here. Thirty-two subjects were included and 82 qualified readings were obtained. The mean differences ± SD for systolic and diastolic BP readings between Accutension and mercury sphygmomanometer were 0.87 ± 2.86 and -0.94 ± 2.93 mm Hg. Agreements between Accutension and mercury sphygmomanometer were highly significant for systolic (ICC = 0.993, 95% confidence interval (CI): 0.989-0.995) and diastolic (ICC = 0.987, 95% CI: 0.979-0.991). In conclusion, Accutension worked accurately based on our pilot study data. The difference was acceptable. ICC and Bland-Altman plot charts showed good agreements with manual measurements. Systolic readings of Accutension were slightly higher than those of manual measurement, while diastolic readings were slightly lower. One possible reason was that Accutension captured the first and the last korotkoff sound more sensitively than human ear during manual measurement and avoided sound missing, so that it might be more accurate than traditional mercury sphygmomanometer. By documenting and analyzing of variant tendency of BP values, Accutension helps management of hypertension and therefore contributes to the mobile heath service.
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Affiliation(s)
- Hongjun Wu
- Department of Cardiology, Yixing No. 2 People's Hospital
| | - Bingjian Wang
- Department of Cardiology, Huai’an First People's Hospital, Nanjing Medical University, Jiangsu Province
| | - Xinpu Zhu
- Department of Neurology, Branch of Shanghai General Hospital
| | - Guang Chu
- Department of Cardiology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China
| | - Zhi Zhang
- Department of Cardiology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China
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Joffe R, Duff J, Garcia Guerra G, Pugh J, Joffe AR. The accuracy of blood pressure measured by arterial line and non-invasive cuff in critically ill children. Crit Care 2016; 20:177. [PMID: 27268414 PMCID: PMC4897864 DOI: 10.1186/s13054-016-1354-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 05/17/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The accuracy of arterial lines (AL) using the flush test or stopcock test has not been described in children, nor has the difference between invasive arterial blood pressure (IABP) versus non-invasive cuff (NIBP) blood pressure. METHODS After ethics approval and consent, we performed the flush test and stopcock test on AL (to determine over damping, under damping, and optimal damping), and determined the difference (NIBP-IABP) in systolic, diastolic, and mean blood pressure (ΔSBP, ΔDBP, and ΔMAP). The primary outcome was incidence (95 % CI) of optimally damped AL. Predictors of ΔBP (effect size (95 % CI)) were determined using multiple linear regression. RESULTS There were 147 AL tests in 100 enrolled patients with mean age 44.7 (SD 56) months, weight 16.8 (SD 18.3) kg, male 59 %, postoperative-cardiovascular 52 %, peripheral-AL 78 %, inotropes 29 %, vasodilators 15 %, and ventilated 73 %. The flush test performed in 66 patients (45 %) showed optimal damping in 30 (46 %; 95 % CI 34, 57 %), over damping in 25 (38 %) and under damping in 11 patients (17 %). The stopcock test was over-damped in 128/146 patients (88 %), with the same damping as the flush test in 24/64 (38 %). In optimally damped (flush test) AL, ΔSBP, ΔDBP, and ΔMAP were 0.8 (SD 12.2), -5.2 (SD 8.7), and -4.9 (7.6) respectively. A second set of AL tests was done 2 h later on the same day in 62 patients; AL damping often changed (10/28 flush tests) and ΔBPs correlated poorly (r = 0.31-0.55). Predictors (effect size) of ΔDBP were vasodilator infusion (15.6 (2.9 to 28.3); p = 0.016) and optimal damping (-7.2 (-12.2 to 2.2); p = 0.005); and of ΔMAP were vasodilator infusion (10.0 (-0.3 to 20.4); p = 0.057) and optimal damping (-4.0 (-8 to 0.1); p = 0.058). There were no independent predictors of damping category (n = 66 flush tests). CONCLUSIONS Optimally damped AL occur in half of critically ill children, and this is not predictable. There is much variability in ∆BP between NIBP and the gold standard IABP, and this varies even in the same patient on the same day, and is not easily predictable. In critically ill children, NIBP may not be accurate enough to guide management, and more attention to ensuring the AL is optimally damped is needed.
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Affiliation(s)
- Rachel Joffe
- University of Alberta, Faculty of Science, Edmonton, Alberta, Canada
| | - Jonathan Duff
- Department of Pediatrics, University of Alberta and Stollery Children's Hospital, Edmonton, Alberta, Canada
| | - Gonzalo Garcia Guerra
- Department of Pediatrics, University of Alberta and Stollery Children's Hospital, Edmonton, Alberta, Canada
| | - Jodie Pugh
- Department of Pediatrics, University of Alberta and Stollery Children's Hospital, Edmonton, Alberta, Canada
| | - Ari R Joffe
- Department of Pediatrics, University of Alberta and Stollery Children's Hospital, Edmonton, Alberta, Canada. .,4-546 Edmonton Clinic Health Academy, 11405 87 Avenue, Edmonton, Alberta, T6G 1C9, Canada.
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Verberk WJ, Cheng HM, Huang LC, Lin CM, Teng YP, Chen CH. Practical Suitability of a Stand-Alone Oscillometric Central Blood Pressure Monitor: A Review of the Microlife WatchBP Office Central. Pulse (Basel) 2016; 3:205-16. [PMID: 27195242 DOI: 10.1159/000443771] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Accumulating evidence indicates that central blood pressure (CBP) is a better cardiovascular risk predictor than brachial blood pressure (BP). Although more additional benefits of CBP-based treatment above usual hypertension treatment are to be demonstrated, the demand for implementing CBP assessment in general clinical practice is increasing. For this, the measurement procedure must be noninvasive, easy to perform, and cost- and time-efficient. Therefore, oscillometric devices with the possibility to assess CBP seem the best option. Recently, such an oscillometric BP monitor, the Microlife WatchBP Office Central, was developed, which demonstrated its high accuracy in a validation study against invasive BP measurement. Calibration errors of this device are limited because the procedure is automated, standardized, and performed at the same place of and within 30 s from pulse wave assessment. The transformation from the peripheral pulse wave to CBP is done by means of an individual-based pulse wave analysis according to a theory of arterial compliance and wave reflections. In addition, the device has demonstrated to enable a more reliable diagnosis of hypertension by CBP than by peripheral BP, with a lower frequency of over- and underdiagnosis. Altogether, the available clinical evidence suggests that the Microlife WatchBP Office Central fulfills the criteria for general clinical use.
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Affiliation(s)
- Willem J Verberk
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, The Netherlands; Department of Research and Development, Microlife Corporation, Taipei, Taiwan, ROC
| | - Hao-Min Cheng
- Department of Medical Education, Taipei Veterans General Hospital, Taipei, Taiwan, ROC; Department of Medicine, National Yang-Ming University, Taipei, Taiwan, ROC; Department of Public Health, National Yang-Ming University, Taipei, Taiwan, ROC
| | - Li-Chih Huang
- Department of Research and Development, Microlife Corporation, Taipei, Taiwan, ROC
| | - Chia-Ming Lin
- Department of Research and Development, Microlife Corporation, Taipei, Taiwan, ROC
| | - Yao-Pin Teng
- Department of Research and Development, Microlife Corporation, Taipei, Taiwan, ROC
| | - Chen-Huan Chen
- Department of Medical Education, Taipei Veterans General Hospital, Taipei, Taiwan, ROC; Department of Medicine, National Yang-Ming University, Taipei, Taiwan, ROC; Department of Public Health, National Yang-Ming University, Taipei, Taiwan, ROC
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Smetkin AA, Hussain A, Fot EV, Zakharov VI, Izotova NN, Yudina AS, Dityateva ZA, Gromova YV, Kuzkov VV, Bjertnæs LJ, Kirov MY. Estimated continuous cardiac output based on pulse wave transit time in off-pump coronary artery bypass grafting: a comparison with transpulmonary thermodilution. J Clin Monit Comput 2016; 31:361-370. [PMID: 26951494 DOI: 10.1007/s10877-016-9853-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 02/28/2016] [Indexed: 11/30/2022]
Abstract
To evaluate the accuracy of estimated continuous cardiac output (esCCO) based on pulse wave transit time in comparison with cardiac output (CO) assessed by transpulmonary thermodilution (TPTD) in off-pump coronary artery bypass grafting (OPCAB). We calibrated the esCCO system with non-invasive (Part 1) and invasive (Part 2) blood pressure and compared with TPTD measurements. We performed parallel measurements of CO with both techniques and assessed the accuracy and precision of individual CO values and agreement of trends of changes perioperatively (Part 1) and postoperatively (Part 2). A Bland-Altman analysis revealed a bias between non-invasive esCCO and TPTD of 0.9 L/min and limits of agreement of ±2.8 L/min. Intraoperative bias was 1.2 L/min with limits of agreement of ±2.9 L/min and percentage error (PE) of 64 %. Postoperatively, bias was 0.4 L/min, limits of agreement of ±2.3 L/min and PE of 41 %. A Bland-Altman analysis of invasive esCCO and TPTD after OPCAB found bias of 0.3 L/min with limits of agreement of ±2.1 L/min and PE of 40 %. A 4-quadrant plot analysis of non-invasive esCCO versus TPTD revealed overall, intraoperative and postoperative concordance rate of 76, 65, and 89 %, respectively. The analysis of trending ability of invasive esCCO after OPCAB revealed concordance rate of 73 %. During OPCAB, esCCO demonstrated poor accuracy, precision and trending ability compared to TPTD. Postoperatively, non-invasive esCCO showed better agreement with TPTD. However, invasive calibration of esCCO did not improve the accuracy and precision and the trending ability of method.
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Affiliation(s)
- Alexey A Smetkin
- Department of Anesthesiology and Intensive Care Medicine, Northern State Medical University, Troitsky Av. 51, Arkhangelsk, Russian Federation, 163000. .,Department of Anesthesiology and Intensive Care Medicine, City Hospital #1 of Arkhangelsk, Suvorova Str. 1, Arkhangelsk, Russian Federation, 163000. .,Department of Clinical Medicine (Anesthesiology), Faculty of Health Sciences, University of Tromsø, The Arctic University of Norway, Tromsø, Norway.
| | - Ayyaz Hussain
- Department of Anesthesiology and Intensive Care Medicine, Northern State Medical University, Troitsky Av. 51, Arkhangelsk, Russian Federation, 163000
| | - Evgenia V Fot
- Department of Anesthesiology and Intensive Care Medicine, Northern State Medical University, Troitsky Av. 51, Arkhangelsk, Russian Federation, 163000.,Department of Anesthesiology and Intensive Care Medicine, City Hospital #1 of Arkhangelsk, Suvorova Str. 1, Arkhangelsk, Russian Federation, 163000
| | - Viktor I Zakharov
- Department of Anesthesiology and Intensive Care Medicine, Northern State Medical University, Troitsky Av. 51, Arkhangelsk, Russian Federation, 163000
| | - Natalia N Izotova
- Department of Anesthesiology and Intensive Care Medicine, Northern State Medical University, Troitsky Av. 51, Arkhangelsk, Russian Federation, 163000
| | - Angelika S Yudina
- Department of Anesthesiology and Intensive Care Medicine, Northern State Medical University, Troitsky Av. 51, Arkhangelsk, Russian Federation, 163000
| | - Zinaida A Dityateva
- Department of Anesthesiology and Intensive Care Medicine, Northern State Medical University, Troitsky Av. 51, Arkhangelsk, Russian Federation, 163000
| | - Yanina V Gromova
- Department of Anesthesiology and Intensive Care Medicine, Northern State Medical University, Troitsky Av. 51, Arkhangelsk, Russian Federation, 163000
| | - Vsevolod V Kuzkov
- Department of Anesthesiology and Intensive Care Medicine, Northern State Medical University, Troitsky Av. 51, Arkhangelsk, Russian Federation, 163000.,Department of Anesthesiology and Intensive Care Medicine, City Hospital #1 of Arkhangelsk, Suvorova Str. 1, Arkhangelsk, Russian Federation, 163000
| | - Lars J Bjertnæs
- Department of Clinical Medicine (Anesthesiology), Faculty of Health Sciences, University of Tromsø, The Arctic University of Norway, Tromsø, Norway
| | - Mikhail Y Kirov
- Department of Anesthesiology and Intensive Care Medicine, Northern State Medical University, Troitsky Av. 51, Arkhangelsk, Russian Federation, 163000.,Department of Anesthesiology and Intensive Care Medicine, City Hospital #1 of Arkhangelsk, Suvorova Str. 1, Arkhangelsk, Russian Federation, 163000.,Department of Clinical Medicine (Anesthesiology), Faculty of Health Sciences, University of Tromsø, The Arctic University of Norway, Tromsø, Norway
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da Cunha AF, Ramos SJ, Domingues M, Beaufrère H, Shelby A, Stout R, Acierno MJ. Agreement between two oscillometric blood pressure technologies and invasively measured arterial pressure in the dog. Vet Anaesth Analg 2016; 43:199-203. [DOI: 10.1111/vaa.12312] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Accepted: 05/13/2015] [Indexed: 11/29/2022]
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Benmira A, Perez-Martin A, Schuster I, Aichoun I, Coudray S, Bereksi-Reguig F, Dauzat M. From Korotkoff and Marey to automatic non-invasive oscillometric blood pressure measurement: does easiness come with reliability? Expert Rev Med Devices 2016; 13:179-89. [DOI: 10.1586/17434440.2016.1128821] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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McNett M, Koren J. Blood Pressure Management Controversies in Neurocritical Care. Crit Care Nurs Clin North Am 2015; 28:9-19. [PMID: 26873756 DOI: 10.1016/j.cnc.2015.09.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Blood pressure (BP) management is essential in neurocritical care settings to ensure adequate cerebral perfusion and prevent secondary brain injury. Despite consensus on the importance of BP monitoring, significant practice variations persist regarding optimal methods for monitoring and treatment of BP values among patients with neurologic injuries. This article provides a summary of research investigating various approaches for BP management in neurocritical care. Evidence-based recommendations, areas for future research, and current technological advancements for BP management are discussed.
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Affiliation(s)
- Molly McNett
- Nursing Research, The MetroHealth System, Nursing Business Office, 2500 MetroHealth Drive, Cleveland, OH 44109, USA.
| | - Jay Koren
- Surgical Intensive Care Unit, The MetroHealth System, Nursing Business Office, 2500 MetroHealth Drive, Cleveland, OH 44109, USA
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Tissue-informative mechanism for wearable non-invasive continuous blood pressure monitoring. Sci Rep 2014; 4:6618. [PMID: 25331013 PMCID: PMC4204067 DOI: 10.1038/srep06618] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Accepted: 09/25/2014] [Indexed: 11/14/2022] Open
Abstract
Accurate continuous direct measurement of the blood pressure is currently available thru direct invasive methods via intravascular needles, and is mostly limited to use during surgical procedures or in the intensive care unit (ICU). Non-invasive methods that are mostly based on auscultation or cuff oscillometric principles do provide relatively accurate measurement of blood pressure. However, they mostly involve physical inconveniences such as pressure or stress on the human body. Here, we introduce a new non-invasive mechanism of tissue-informative measurement, where an experimental phenomenon called subcutaneous tissue pressure equilibrium is revealed and related for application in detection of absolute blood pressure. A prototype was experimentally verified to provide an absolute blood pressure measurement by wearing a watch-type measurement module that does not cause any discomfort. This work is supposed to contribute remarkably to the advancement of continuous non-invasive mobile devices for 24-7 daily-life ambulatory blood-pressure monitoring.
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Does the reperfusing brain recover better under pressure?*. Crit Care Med 2014; 42:2145-6. [PMID: 25126807 DOI: 10.1097/ccm.0000000000000469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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