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Invasive Arterial Blood Pressure Monitoring

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https://www.readbyqxmd.com/read/28599199/the-haemodynamic-effects-of-bolus-versus-slower-infusion-of-intravenous-crystalloid-in-healthy-volunteers
#1
Ida F Ukor, Andrew K Hilton, Michael J Bailey, Rinaldo Bellomo
PURPOSE: This pilot study aimed to characterise the haemodynamic effect of 1L of IV normal saline (NS) administered as a rapid versus slow infusion on cardiac output (CO), heart rate (HR), systemic blood pressures, and carotid blood flow in six healthy volunteers. MATERIALS AND METHODS: Six healthy male volunteers aged 18-65years were randomized to receive 1L NS given over 30min or 120min. On a subsequent study session the alternate fluid regimen was administered...
May 30, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/28580340/a-system-for-continuous-estimating-and-monitoring-cardiac-output-via-arterial-waveform-analysis
#2
A Vakily, H Parsaei, M M Movahhedi, M A Sahmeddini
BACKGROUND: Cardiac output (CO) is the total volume of blood pumped by the heart per minute and is a function of heart rate and stroke volume. CO is one of the most important parameters for monitoring cardiac function, estimating global oxygen delivery and understanding the causes of high blood pressure. Hence, measuring CO has always been a matter of interest to researchers and clinicians. Several methods have been developed for this purpose, but a majority of them are either invasive, too expensive or need special expertise and experience...
June 2017: Journal of Biomedical Physics & Engineering
https://www.readbyqxmd.com/read/28570147/estimating-arterial-partial-pressure-of-carbon-dioxide-in-ventilated-patients-how-valid-are-surrogate-measures
#3
Boulos S Nassar, Gregory A Schmidt
The arterial partial pressure of carbon dioxide (PaCO2) is an important parameter in critically ill, mechanically ventilated patients. To limit invasive procedures or for more continuous monitoring of PaCO2, clinicians often rely on venous blood gases, capnography, or transcutaneous monitoring. Each of these has advantages and limitations. Central venous Pco2 allows accurate estimation of PaCO2, differing from it by an amount described by the Fick principle. As long as cardiac output is relatively normal, central venous Pco2 exceeds the arterial value by approximately 4 mm Hg...
June 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28566194/non-invasive-vagus-nerve-stimulation-acutely-improves-spontaneous-cardiac-baroreflex-sensitivity-in-healthy-young-men-a-randomized-placebo-controlled-trial
#4
Diego Antonino, André L Teixeira, Paulo M Maia-Lopes, Mayara C Souza, Jeann L Sabino-Carvalho, Aaron R Murray, Jim Deuchars, Lauro C Vianna
BACKGROUND: Despite positive outcomes of transcutaneous vagus nerve stimulation (tVNS) via the auricular branch of the vagus nerve (ABVN), the mechanisms underlying these outcomes remain unclear. Additionally, previous studies have not been controlled the possible placebo effects of tVNS. OBJECTIVE: To test the hypothesis that tVNS acutely improves spontaneous cardiac baroreflex sensitivity (cBRS) and autonomic modulation, and that these effects are specific to stimulation of ABVN...
May 19, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28565972/effects-of-insulin-glucose-pretreatment-on-bupivacaine-cardiotoxicity-in-rats
#5
Ö Pişkin, B G Aydın
A mistaken overdose of bupivacaine into systemic circulation may cause severe cardiovascular side effects. The aim of this study was to assess the effects of pretreatment with combined intra venous lipid emulsion (ILE) and high-dose insulin therapy against cardiotoxicity caused by bupivacaine intoxication. The rats were divided into the following three groups: Group B received a saline pretreatment plus a bupivacaine, group L received ILE pretreatment plus a bupivacaine, and in group I, insulin with glucose was infused intravenously, plus ILE pretreatment plus a bupivacaine...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28544893/agreement-of-invasive-and-non-invasive-blood-pressure-measurements-in-anaesthetised-pigs-using-the-surgivet-v9203
#6
Philomena P Tuohy, Anthea L Raisis, Eleanor A Drynan
The automated oscillometric method is a common method for measuring blood pressure non-invasively and is broadly and confidently used in the veterinary setting. Twenty-one pigs undergoing anesthesia for exploratory laparotomy were enrolled in a study to evaluate the performance of the Surgivet V9203 non-invasive blood pressure (NIBP) monitor. The aim was to compare measurements of arterial blood pressure obtained simultaneously using the Surgivet V9203 oscillometric system and an intra-arterial catheter-transducer system, both at the level of the metatarsus...
May 19, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28543052/norepinephrine-reduces-arterial-compliance-less-than-phenylephrine-when-treating-general-anesthesia-induced-arterial-hypotension
#7
F Vallée, O Passouant, A Le Gall, J Joachim, J Mateo, A Mebazaa, E Gayat
INTRODUCTION: During general anesthesia, arterial hypotension is frequent and may be an important contributor to perioperative morbidity. We assessed the effect of a 5 μg bolus of Norepinephrine (NA) when compared with 50 μg bolus of Phenylephrine (PE) administered to treat hypotension during maintenance anesthesia, on MAP, derived cardiac output and arterial stiffness parameters. METHODS: Patients scheduled for a neurosurgical procedure under general anesthesia were prospectively included...
July 2017: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/28541158/noninvasive-optical-monitoring-of-critical-closing-pressure-and-arteriole-compliance-in-human-subjects
#8
Wesley B Baker, Ashwin B Parthasarathy, Kimberly P Gannon, Venkaiah C Kavuri, David R Busch, Kenneth Abramson, Lian He, Rickson C Mesquita, Michael T Mullen, John A Detre, Joel H Greenberg, Daniel J Licht, Ramani Balu, W Andrew Kofke, Arjun G Yodh
The critical closing pressure ( CrCP) of the cerebral circulation depends on both tissue intracranial pressure and vasomotor tone. CrCP defines the arterial blood pressure ( ABP) at which cerebral blood flow approaches zero, and their difference ( ABP -  CrCP) is an accurate estimate of cerebral perfusion pressure. Here we demonstrate a novel non-invasive technique for continuous monitoring of CrCP at the bedside. The methodology combines optical diffuse correlation spectroscopy (DCS) measurements of pulsatile cerebral blood flow in arterioles with concurrent ABP data during the cardiac cycle...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28540470/effects-of-remifentanil-pretreatment-on-bupivacaine-cardiotoxicity-in-rats
#9
Özcan Pişkin, Hilal Ayoğlu
Unintentional intravascular administration of bupivacaine may cause local anesthetic systemic toxicity (LAST). Although many systems are affected in LAST, the cardiovascular effects can be life-threatening. Remifentanil is a selective, ultra-short-acting, µ-opioid receptor agonist opioid. This study assessed the effects of combined pretreatment with intravenous lipid emulsion (ILE) and remifentanil on the cardiotoxicity caused by bupivacaine in an experimental model of anesthetized rats. The rats were divided into three groups...
May 24, 2017: Cardiovascular Toxicology
https://www.readbyqxmd.com/read/28530772/characteristics-of-the-injuries-of-syrian-refugees-sustained-during-the-civil-war
#10
Betül Kocamer Şimşek, Mehmet Dokur, Erdal Uysal, Necdet Çalıker, Oruç Numan Gökçe, İbrahim Kürşat Deniz, Murat Uğur, Murat Geyik, Mehmet Kaya, Güner Dağlı
BACKGROUND: During a war, many civilians are severely injured by firearms, bombs, and shrapnel. The triage of war injuries involves difficult and complicated processes requiring surgical procedures and patient monitoring in the Intensive Care Unit (ICU) of hospitals. In this study, we examine the demographic, traumatic, and critical care characteristics of cases injured during the civil war in Syria and requiring emergency surgery. METHODS: Electronic data of the traumatic, surgical, and ICU monitoring features of 707 patients admitted to Kilis Public Hospital between March 2012 and January 2013 were analyzed retrospectively RESULTS: Most of the patients reported having been injured due to firearms (83...
May 2017: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/28528758/comparison-of-arterial-blood-pressure-measurements-obtained-invasively-or-oscillometrically-using-a-datex-s-5-compact-monitor-in-anaesthetised-adult-horses
#11
Tyfane T Yamaoka, Derek Flaherty, Patricia Pawson, Marian Scott, Adam Auckburally
OBJECTIVE: To assess agreement between noninvasive blood pressure (NIBP) oscillometrically-derived values from a multiparameter monitor (Datex Ohmeda S/5 Compact) with those obtained by invasive blood pressure (IBP) measurement in anaesthetised horses undergoing elective surgery. STUDY DESIGN: Prospective clinical study. ANIMALS: A total of 40 healthy adult horses. METHODS: Horses were anaesthetised with various anaesthetic protocols (based on clinical requirements)...
January 11, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28523028/peripheral-arterial-blood-pressure-versus-central-crterial-blood-pressure-monitoring-in-critically-ill-patients-after-cardio-pulmonary-bypass
#12
Rana Altaf Ahmad, Suhail Ahmad, Anjum Naveed, Mirza Ahmad Raza Baig
OBJECTIVE: To determine the accuracy of peripheral (radial) arterial access as compared to central (femoral) arterial access for measurement of invasive blood pressure (IBP) in critically ill patients after cardiopulmonary bypass. METHODS: Sixty patients (60) who required high inotropic/vasopressor support on weaning from cardio-pulmonary bypass and weaned off in 2(nd) attempt were included in this study. The duration of this study was from June 2015 to August 2016...
March 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/28521050/sudden-unexpected-death-during-sleep-in-familial-dysautonomia-a-case-control-study
#13
Jose-Alberto Palma, Lucy Norcliffe-Kaufmann, Miguel A Perez, Christy L Spalink, Horacio Kaufmann
Study Objectives: Sudden unexpected death during sleep (SUDS) is the most common cause of death in patients with familial dysautonomia, an autosomal recessive disease characterized by sensory and autonomic dysfunction. It remains unknown what causes SUDS in these patients and who is at highest risk. We tested the hypothesis that SUDS in FD is linked to sleep-disordered breathing. Methods: We retrospectively identified patients with familial dysautonomia who died suddenly and unexpectedly during sleep and had undergone polysomnography within the 18-month period prior to death...
May 18, 2017: Sleep
https://www.readbyqxmd.com/read/28514936/evaluation-of-an-indirect-oscillometric-blood-pressure-monitor-in-anaesthetised-dogs-at-three-different-anatomical-locations
#14
M Fujiyama, H Sano, J P Chambers, M Gieseg
AIMS: To evaluate the agreement between invasive and non-invasive measurements of blood pressure (BP) using an oscillometer (PetTrust) at three different anatomical locations in anaesthetised dogs under different haemodynamic conditions. METHODS: Eight adult Greyhounds weighing 23.5-36.5 kg were anaesthetised with isoflurane and positioned in dorsal recumbency. Systolic arterial pressure (SAP), diastolic arterial pressure (DAP) and mean arterial pressure (MAP) were measured invasively via a dorsal pedal artery and non-invasively using the oscillometer with cuffs placed above the carpus, above the tarsus and around the tail base...
July 2017: New Zealand Veterinary Journal
https://www.readbyqxmd.com/read/28497934/cerebral-autoregulation-monitoring-in-acute-traumatic-brain-injury-what-s-the-evidence
#15
Leanne A Calviello, Joseph Donnelly, Frederick A Zeiler, Eric P Thelin, Peter Smielewski, Marek Czosnyka
Cerebral autoregulation is conceptualized as a vascular self-regulatory mechanism within the brain. Controlled by elusive relationships between various biophysical processes, it functions to protect the brain against potential damages caused by sudden changes in cerebral perfusion pressures and flow. Following events such as traumatic brain injuries (TBI), autoregulation may be compromised, potentially leading to an unfavorable outcome. In spite of its complexity, autoregulation has been able to be quantified non-invasively within the neuro-critical care setting with the aid of transcranial Doppler...
May 12, 2017: Minerva Anestesiologica
https://www.readbyqxmd.com/read/28497180/performance-of-a-capnodynamic-method-estimating-effective-pulmonary-blood-flow-during-transient-and-sustained-hypercapnia
#16
Thorir Svavar Sigmundsson, Tomas Öhman, Magnus Hallbäck, Eider Redondo, Fernando Suarez Sipmann, Mats Wallin, Anders Oldner, Caroline Hällsjö Sander, Håkan Björne
The capnodynamic method is a minimally invasive method continuously calculating effective pulmonary blood flow (COEPBF), equivalent to cardiac output when intra pulmonary shunt flow is low. The capnodynamic equation joined with a ventilator pattern containing cyclic reoccurring expiratory holds, provides breath to breath hemodynamic monitoring in the anesthetized patient. Its performance however, might be affected by changes in the mixed venous content of carbon dioxide (CvCO2). The aim of the current study was to evaluate COEPBF during rapid measurable changes in mixed venous carbon dioxide partial pressure (PvCO2) following ischemia-reperfusion and during sustained hypercapnia in a porcine model...
May 11, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28474097/advanced-hemodynamic-monitoring-in-intensive-care-medicine-a%C3%A2-german-web-based-survey-study
#17
B Saugel, P C Reese, J Y Wagner, M Buerke, W Huber, S Kluge, R Prondzinsky
BACKGROUND: Advanced hemodynamic monitoring is recommended in patients with complex circulatory shock. OBJECTIVES: To evaluate the current attitudes and beliefs among German intensivists, regarding advanced hemodynamic monitoring, the actual hemodynamic management in clinical practice, and the barriers to using it. MATERIALS AND METHODS: Web-based survey among members of the German Society of Medical Intensive Care and Emergency Medicine. RESULTS: Of 284 respondents, 249 (87%) agreed that further hemodynamic assessment is needed to determine the type of circulatory shock if no clear clinical diagnosis can be made...
May 4, 2017: Medizinische Klinik, Intensivmedizin und Notfallmedizin
https://www.readbyqxmd.com/read/28428520/-prevention-of-spinal-cord-ischemia-during-thoracic-endovascular-aortic-repair
#18
Shinya Takahashi, Taijiro Sueda
Spinal cord ischemia(SCI) has been devastating complication of endovascular thoracic and thoracoabdominal aortic repair. Spinal cord blood supply arises from not only segmental artery, subclavian artery, hypogastric artery and these branches, but also perivertebral vasculature and paravertebral muscle and small arterial network, and risk factors of SCI were multifactorial. There are several adjuncts/strategies which are utilized to minimize the incidence of SCI: cerebrospinal fluid drainage, perioperative management of high mean arterial pressure, intraoperative evoked potential monitoring, and staged thoracoabdominal aortic repair...
April 2017: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/28402021/validation-of-non-invasive-haemodynamic-methods-in-patients-with-liver-disease-the-finometer-and-the-task-force-monitor
#19
Jane M Brittain, Troels M Busk, Søren Møller
Patients with advanced cirrhosis often present a hyperdynamic circulation characterized by a decrease in systolic and diastolic blood pressure (SBP and DBP), and an increase in heart rate (HR) and cardiac output (CO). Accurate assessment of the altered circulation can be performed invasively; however, due to the disadvantages of this approach, non-invasive methods are warranted. The purpose of this study was to compare continuous non-invasive measurements of haemodynamic variables by the Finometer and the Task Force Monitor with simultaneous invasive measurements...
April 12, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28379881/comparison-of-noninvasive-blood-pressure-monitoring-with-invasive-arterial-pressure-monitoring-in-medical-icu-patients-with-septic-shock
#20
Leonard E Riley, Guoqing John Chen, Heath E Latham
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...
April 4, 2017: Blood Pressure Monitoring
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