A New Noninvasive Method to Measure Blood Pressure 

1999 ◽  
Vol 91 (3) ◽  
pp. 686-686 ◽  
Author(s):  
Kumar Belani ◽  
Makoto Ozaki ◽  
James Hynson ◽  
Thomas Hartmann ◽  
Hugo Reyford ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Critically Ill ◽  
Radial Artery ◽  
Pulse Rate ◽  
Critically Ill Patients ◽  
Arterial Catheter ◽  
Arterial Waveform ◽  
Measure Blood Pressure ◽  
The Mean ◽  
Radial Artery Catheter

Background Blood pressure (BP) monitoring with arterial waveform display requires an arterial cannula. We evaluated a new noninvasive device, Vasotrac (Medwave, Arden Hills, MN) that provides BP measurements approximately every 12-15 beats and displays pulse rate and a calibrated arterial waveform for each BP measurement. Methods Surgical and critically ill patients (n = 80) served as subjects for the study. BPs, pulse waveforms, and pulse rates measured via a radial artery catheter were compared with those obtained by the Vasotrac from the opposite radial artery. Data were analyzed to determine agreement between the two systems of measurement. Results Blood pressure measured noninvasively by the Vasotrac demonstrated excellent correlation (P<0.01) with BP measured via a radial arterial catheter (systolic r2 = 0.93; diastolic r2 = 0.89; mean r2 = 0.95). Differences in BP measured by the Vasotrac versus the radial arterial catheter were small. The mean+/-SD bias and precision were as follows: systolic BP 0.02+/-5.4 mm Hg and 3.9+/-3.7 mm Hg; diastolic BP -0.39+/-3.9 mm Hg and 2.7+/-2.8 mm Hg; mean BP -0.21+/-3.0 mm Hg and 2.1+/-2.2 mm Hg compared with radial artery measurements. The Vasotrac pulse rates were almost identical to those measured directly (r2 = 0.95). The Vasotrac BP waveform resembled those directly obtained radial artery pulsatile waveforms. Conclusions In surgical and critically ill patients, the Vasotrac measured BP, pulse rate, and displayed radial artery waveform, which was similar to direct radial arterial measurements. It should be a suitable device to measure BP frequently in a noninvasive fashion.

scholarly journals Assessment of Cardiovascular Changes among Indoor and Outdoor Cleaners in a Tertiary Institution in Delta State, South-South Nigeria

2020 ◽  
Vol 24 (2) ◽  
pp. 245-248
Author(s):  
S.I. Ovuakporaye ◽  
A.E. Ojieh ◽  
M.T. Okumagba
Keyword(s):  
Blood Pressure ◽  
Air Pollution ◽  
Pulse Rate ◽  
State University ◽  
Tertiary Institution ◽  
Cardiovascular Changes ◽  
Measure Blood Pressure ◽  
The Mean ◽  
Delta State University ◽  
Indoor And Outdoor

This study is aimed at assessing cardiovascular changes amongst indoor and outdoor cleaners in Delta State University, Abraka. A total of one hundred (100) cleaners were randomly selected for the study, comprising of fifty (50) indoor and fifty (50) outdoor cleaners. Data were collected and the digital sphygmomanometerwas used to measure blood pressure and pulse rate of subjects. Results obtained ranged from 93/73mmHg – 177/102mmHg, 62 – 102beats/min and 85/50- 139/90mmHg, 60- 107beats/min for indoor and outdoor cleaners respectively. The result showed that the mean blood pressure was higher in indoor cleaner than outdoor cleaners and the mean pulse rate of outdoor cleaners was higher than that of indoor. Also, age was positively correlated with pulse rate and systolic blood pressure while the duration of work per day was correlated negatively with blood pressure and pulse rate. The study has established that blood pressure was higher among indoor cleaner than outdoor cleaner, while pulse rate was higher among outdoor cleaner than indoor cleaners. The study has also strengthened the need for cleaners to put on protective devices to reduce exposure to air pollution and encourage cleaners to undergo regular medical check. Keywords: Assessment, cardiovascular changes, indoor and outdoor cleaners

scholarly journals Pulmonary Extraction of Catecholamines in Critically Ill Patients

1982 ◽  
Vol 10 (4) ◽  
pp. 319-323 ◽  
Author(s):  
W. John Russell ◽  
Derek B. Frewin ◽  
Julie R. Jonsson
Keyword(s):  
Pulmonary Artery ◽  
Critically Ill ◽  
Radial Artery ◽  
Critically Ill Patients ◽  
Plasma Catecholamine ◽  
Dopamine Infusion ◽  
Clearance Mechanism ◽  
The Mean ◽  
Plasma Catecholamine Concentrations ◽  
Mixed Venous

Plasma catecholamine concentrations in blood obtained simultaneously from the pulmonary and radial arteries of ten critically ill patients have been measured. The mean mixed venous concentrations of noradrenaline, adrenaline and dopamine were extremely high, noradrenaline 11.3 pmol/ml (SD 11.6), adrenaline 2.7 pmol/ml (SD 3.0) and dopamine 7.1 pmol/ml (SD 12.3). An appreciable drop in the concentrations occurred as the blood passed from the pulmonary artery to the radial artery (mean fall 24.1, 29.7 and 45.8% respectively). Four patients receiving a therapeutic dopamine infusion were also studied and demonstrated similar trends in catecholamine concentrations. The results suggest a substantial pulmonary clearance mechanism for all three catecholamines.

scholarly journals Report of the first AKI Round Table meeting: an initiative of the ESICM AKI Section

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
M. Ostermann ◽  
A. Schneider ◽  
T. Rimmele ◽  
I. Bobek ◽  
M. van Dam ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Critical Care ◽  
Intensive Care ◽  
Renal Replacement Therapy ◽  
Replacement Therapy ◽  
Critically Ill ◽  
Critically Ill Patients ◽  
Future Research ◽  
Knowledge Gaps ◽  
Blood Pressure Targets

Abstract Purpose Critical Care Nephrology is an emerging sub-specialty of Critical Care. Despite increasing awareness about the serious impact of acute kidney injury (AKI) and renal replacement therapy (RRT), important knowledge gaps persist. This report represents a summary of a 1-day meeting of the AKI section of the European Society of Intensive Care Medicine (ESICM) identifying priorities for future AKI research. Methods International Members of the AKI section of the ESICM were selected and allocated to one of three subgroups: “AKI diagnosis and evaluation”, “Medical management of AKI” and “Renal Replacement Therapy for AKI.” Using a modified Delphi methodology, each group identified knowledge gaps and developed potential proposals for future collaborative research. Results The following key research projects were developed: Systematic reviews: (a) epidemiology of AKI with stratification by patient cohorts and diagnostic criteria; (b) role of higher blood pressure targets in patients with hypertension admitted to the Intensive Care Unit, and (c) specific clearance characteristics of different modalities of continuous renal replacement therapy (CRRT). Observational studies: (a) epidemiology of critically ill patients according to AKI duration, and (b) current clinical practice of CRRT. Intervention studies:( a) Comparison of different blood pressure targets in critically ill patients with hypertension, and (b) comparison of clearance of solutes with various molecular weights between different CRRT modalities. Conclusion Consensus was reached on a future research agenda for the AKI section of the ESICM.

Abstract 15293: Noninvasive Echocardiographic Cardiac Power Output Predicts Mortality in Cardiac Intensive Care Unit Patients

Circulation ◽  
2020 ◽  
Vol 142 (Suppl_3) ◽  
Author(s):  
Barry Burstein ◽  
Vidhu Anand ◽  
Bradley Ternus ◽  
Meir Tabi ◽  
Nandan S Anavekar ◽  
...  
Keyword(s):  
Intensive Care Unit ◽  
Intensive Care ◽  
Hospital Mortality ◽  
Critically Ill ◽  
Power Output ◽  
Critically Ill Patients ◽  
Cardiac Intensive Care Unit ◽  
Cardiac Power ◽  
The Mean ◽  
Cardiac Intensive Care

Introduction: A low cardiac power output (CPO), measured invasively, identifies critically ill patients at increased risk of mortality. CPO can also be measured non-invasively with transthoracic echocardiography (TTE), although prognostic data in critically ill patients is not available. Hypothesis: Reduced CPO measured by TTE is associated with increased hospital mortality in cardiac intensive care unit (CICU) patients. Methods: Using a database of CICU patients admitted between 2007 and 2018, we identified patients with TTE within one day (before or after) of CICU admission who had data necessary for calculation of CPO. Multivariable logistic regression determined the relationship between CPO and adjusted hospital mortality. Results: We included 5,585 patients with a mean age of 68.3±14.8 years, including 36.7% females. Admission diagnoses included acute coronary syndrome (ACS) in 57%, heart failure (HF) in 50%, cardiac arrest (CA) in 12%, and cardiogenic shock (CS) in 13%. The mean left ventricular ejection fraction (LVEF) was 47±16%, and the mean CPO was 1.0±0.4 W. CPO was inversely associated with the risk of hospital mortality (Figure A), including among patients with ACS, HF, and CS (Figure B). On multivariable analysis, lower CPO was associated with higher hospital mortality (OR 0.96 per 0.1 W, 95% CI 0.0.93-0.99, p=0.03). Hospital mortality was highest in patients with low CPO coupled with reduced LVEF, increased vasopressor requirements, or higher admission lactate. Hospital mortality was higher among patients with a CPO <0.6 W (adjusted OR 1.57, 95% CI 1.13-2.19, p = 0.007), particularly in the presence of admission lactate level >4 mmol/L (50.9%). Conclusions: Echocardiographic CPO was inversely associated with hospital mortality in CICU patients, particularly among patients with increased lactate and vasopressor requirements. Routine measurement of CPO provides important information beyond LVEF and should be considered in CICU patients.

scholarly journals Risk factors for death among critically ill patients with acute renal failure

2006 ◽  
Vol 124 (5) ◽  
pp. 257-263 ◽  
Author(s):  
Geraldo Bezerra da Silva Júnior ◽  
Elizabeth De Francesco Daher ◽  
Rosa Maria Salani Mota ◽  
Francisco Albano Menezes
Keyword(s):  
Risk Factors ◽  
Blood Pressure ◽  
Mechanical Ventilation ◽  
Renal Failure ◽  
Acute Renal Failure ◽  
Intensive Care ◽  
Liver Failure ◽  
Critically Ill ◽  
Critically Ill Patients ◽  
Urine Volume

CONTEXT AND OBJECTIVE: Acute renal failure is a common medical problem, with a high mortality rate. The aim of this work was to investigate the risk factors for death among critically ill patients with acute renal failure. DESIGN AND SETTING: Retrospective cohort at the intensive care unit of Hospital Universitário Walter Cantídio, Fortaleza. METHODS: Survivors and non-survivors were compared. Univariate and multivariate analyses were performed to establish risk factors for death. RESULTS: Acute renal failure occurred in 128 patients (33.5%), with mean age of 49 ± 20 years (79 males; 62%). Death occurred in 80 (62.5%). The risk factors most frequently associated with death were hypotension, sepsis, nephrotoxic drug use, respiratory insufficiency, liver failure, hypovolemia, septic shock, multiple organ dysfunction, need for vasoactive drugs, need for mechanical ventilation, oliguria, hypoalbuminemia, metabolic acidosis and anemia. There were negative correlations between death and: prothrombin time, hematocrit, hemoglobin, systolic blood pressure, diastolic blood pressure, arterial pH, arterial bicarbonate and urine volume. From multivariate analysis, the independent risk factors for death were: need for mechanical ventilation (OR = 3.15; p = 0.03), hypotension (OR = 3.48; p = 0.02), liver failure (OR = 5.37; p = 0.02), low arterial bicarbonate (OR = 0.85; p = 0.005), oliguria (OR = 3.36; p = 0.009), vasopressor use (OR = 4.83; p = 0.004) and sepsis (OR = 6.14; p = 0.003). CONCLUSIONS: There are significant risk factors for death among patients with acute renal failure in intensive care units, which need to be identified at an early stage for early treatment.

Factors influencing the accuracy of oscillometric blood pressure measurement in critically ill patients

2003 ◽  
Vol 31 (3) ◽  
pp. 793-799 ◽  
Author(s):  
Andreas Bur ◽  
Harald Herkner ◽  
Marianne Vlcek ◽  
Christian Woisetschläger ◽  
Ulla Derhaschnig ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Critically Ill ◽  
Critically Ill Patients ◽  
Pressure Measurement ◽  
Blood Pressure Measurement ◽  
Factors Influencing ◽  
Oscillometric Blood Pressure Measurement

Blood Pressure Estimation with Considering of Stroke Volume Effect

2008 ◽  
pp. 173-180
Author(s):  
Moha’med O. Al-Jaafreh ◽  
Adel A. Al-Jumaily
Keyword(s):  
Blood Pressure ◽  
Stroke Volume ◽  
Applied Pressure ◽  
Peripheral Resistance ◽  
Volume Effect ◽  
Signal Features ◽  
Measure Blood Pressure ◽  
The Mean ◽  
The Difference ◽  
Blood Pressure Estimation

The mean arterial pressure (MAP) is a very important cardiovascular parameter for physicians to diagnose various cardiovascular diseases. Many algorithms were used to estimate MAP with different accuracy. These algorithms used different factors, such as blood level, pulses, and external applied pressure, photo-plethysmography (PPG) signal features, heart rate (HR), and other factors. In addition, some natural-based techniques were employed to minimize the difference between estimated and measured blood pressure, as well as to measure blood pressure continuously. This article presents an algorithm to estimate MAP, utilizing the HR, Stroke Volume (SV), and Total Peripheral Resistance (TPR), with considering SV changing influence; this consideration is investigated mathematically, and by the Particle Swarm Optimization (PSO) technique.

The effect of Trendelenburg and modified trendelenburg positions on cardiac output, blood pressure, and oxygenation: a preliminary study

1994 ◽  
Vol 3 (5) ◽  
pp. 382-386 ◽  
Author(s):  
CL Ostrow ◽  
E Hupp ◽  
D Topjian
Keyword(s):  
Blood Pressure ◽  
Cardiac Output ◽  
Critically Ill ◽  
Systemic Vascular Resistance ◽  
Vascular Resistance ◽  
Critically Ill Patients ◽  
Hemodynamic Parameters ◽  
Trendelenburg Position ◽  
Dependent Variables ◽  
Preliminary Study

BACKGROUND: Although we have insufficient knowledge about the effects of Trendelenburg positions on various hemodynamic parameters, these positions are frequently used to influence cardiac output and blood pressure in critically ill patients. OBJECTIVES: To determine the effect of Trendelenburg and modified Trendelenburg positions on five dependent variables: cardiac output, cardiac index, mean arterial pressure, systemic vascular resistance, and oxygenation in critically ill patients. METHODS: In this preliminary study subjects were 23 cardiac surgery patients (mean age, 55; SD, 8.09) who had a pulmonary artery catheter for cardiac output determination and who were clinically stable, normovolemic and normotensive. Baseline measurements of the dependent variables were taken in the supine position. Patients were then placed in 10 degrees Trendelenburg or 30 degrees modified Trendelenburg position. The dependent variables were measured after 10 minutes in each position. A 2-period, 2-treatment crossover design with a preliminary baseline measurement was used. RESULTS: Five subjects were unable to tolerate Trendelenburg position because of nausea or pain in the sternal incision. In the 18 who were able to tolerate both position changes, no statistically significant changes were found in the five dependent variables. Changes in systemic vascular resistance over time approached statistical significance and warrant further study. CONCLUSIONS: This preliminary study does not provide support for Trendelenburg positions as a means to influence hemodynamic parameters such as cardiac output and blood pressure in normovolemic and normotensive patients.

Pharmacokinetics of Benzylpenicillin (Penicillin G) during Prolonged Intermittent Renal Replacement Therapy

Chemotherapy ◽  
2019 ◽  
Vol 64 (1) ◽  
pp. 17-21 ◽  
Author(s):  
Vesa Cheng ◽  
Matthew Rawlins ◽  
Tim Chang ◽  
Emma Fox ◽  
John Dyer ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Renal Replacement Therapy ◽  
Replacement Therapy ◽  
Critically Ill ◽  
Critically Ill Patients ◽  
Penicillin G ◽  
Blood Samples ◽  
Staphylococcus Aureus Bacteremia ◽  
The Mean ◽  
Intermittent Renal Replacement Therapy

Prolonged intermittent renal replacement therapy (PIRRT) is an increasingly adopted method of renal replacement in critically ill patients. Like continuous renal replacement therapy, PIRRT can alter the pharmacokinetics (PK) of many drugs. In this setting, dosing data for antibiotics like benzylpenicillin are lacking. In order to enable clinicians to prescribe benzylpenicillin safely and effectively, knowledge of the effects of PIRRT on the plasma PK of benzylpenicillin is required. Herein, we describe the PK of benzylpenicillin in 2 critically ill patients on PIRRT for the treatment of penicillin-susceptible Staphylococcus aureus bacteremia complicated by infective endocarditis. Blood samples were taken for each patient taken over dosing periods during PIRRT and off PIRRT. Two-compartment PK models described significant differences in the mean clearance of benzylpenicillin with and without PIRRT (6.61 vs. 3.04 L/h respectively). We would suggest a benzylpenicillin dose of 1,800 mg (3 million units) every 6-h during PIRRT therapy as sufficient to attain PK/pharmacodynamic target.

In vivo Elimination of Clonidine by Continuous Venovenous Hemofiltration in Critically Ill Patients

2020 ◽  
Vol 49 (5) ◽  
pp. 622-626
Author(s):  
Huub L.A. van den Oever ◽  
Marieke Zeeman ◽  
Polina Nassikovker ◽  
Carmen Bles ◽  
Fred A.L. van Steveninck ◽  
...  
Keyword(s):  
Intensive Care Unit ◽  
Intensive Care ◽  
Critically Ill ◽  
Critically Ill Patients ◽  
Continuous Venovenous Hemofiltration ◽  
Kidney Dysfunction ◽  
Sieving Coefficient ◽  
The Mean ◽  
Ventilated Patients

Background: Clonidine is an α2-agonist that is commonly used for sedation in the intensive care unit. When patients are on continuous venovenous hemofiltration (CVVH) in the presence of kidney dysfunction, the sieving coefficient of clonidine is required to estimate how much drug is removed by CVVH. In the present study, we measured the sieving coefficient of clonidine in critically ill, ventilated patients receiving CVVH. Methods: A total of 20 samples of plasma and ultrafiltrate of 3 patients on CVVH, using a standard 1.5 m2 polyacrylonitrile AN69 membrane, during continuous clonidine infusion were collected. After correction for the effect of predilution, we calculated the sieving coefficient for clonidine. Results: The mean sieving coefficient of clonidine was 0.52 (SD 0.097). Conclusion: Using a polyacrylonitrile AN69 membrane in a CVVH machine, the in vivo sieving coefficient of clonidine was 0.52.

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