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esophageal pressure and balloon catheter

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https://www.readbyqxmd.com/read/27729399/stability-and-agreement-of-a-microtransducer-and-an-air-filled-balloon-esophageal-catheter-in-the-monitoring-of-esophageal-pressure
#1
Renan Maloni Augusto, André Luis Pereira Albuquerque, Thomas Jaeger, Carlos Roberto Ribeiro de Carvalho, Pedro Caruso
BACKGROUND: The use of esophageal catheters with microtransducer promises advantages over traditional catheters with air-filled balloons. However, performance comparisons between these 2 types of catheters are scarce and incomplete. METHODS: A catheter with a 9.5-cm air-filled balloon at the distal tip and a catheter with a microtransducer mounted within a flexible silicone rubber were tested in vitro and in vivo. In vitro, the response times of both catheters were compared, and the drift of the baseline pressure of the microtransducer catheter was evaluated over a 6-h period...
October 11, 2016: Respiratory Care
https://www.readbyqxmd.com/read/27636673/measurement-of-pleural-pressure-swings-with-a-fluid-filled-esophageal-catheter-vs-pulmonary-artery-occlusion-pressure
#2
S Verscheure, P B Massion, S Gottfried, P Goldberg, L Samy, P Damas, S Magder
PURPOSE: Pleural pressure measured with esophageal balloon catheters (Peso) can guide ventilator management and help with the interpretation of hemodynamic measurements, but these catheters are not readily available or easy to use. We tested the utility of an inexpensive, fluid-filled esophageal catheter (Peso) by comparing respiratory-induced changes in pulmonary artery occlusion (Ppao), central venous (CVP), and Peso pressures. METHODS: We studied 30 patients undergoing elective cardiac surgery who had pulmonary artery and esophageal catheters in place...
August 31, 2016: Journal of Critical Care
https://www.readbyqxmd.com/read/27577052/effect-of-high-frequency-oscillatory-ventilation-on-esophageal-and-transpulmonary-pressures-in-moderate-to-severe-acute-respiratory-distress-syndrome
#3
Christophe Guervilly, Jean-Marie Forel, Sami Hraiech, Antoine Roch, Daniel Talmor, Laurent Papazian
BACKGROUND: High-frequency oscillatory ventilation (HFOV) has not been shown to be beneficial in the management of moderate-to-severe acute respiratory distress syndrome (ARDS). There is uncertainty about the actual pressure applied into the lung during HFOV. We therefore performed a study to compare the transpulmonary pressure (P L) during conventional mechanical ventilation (CMV) and different levels of mean airway pressure (mPaw) during HFOV. METHODS: This is a prospective randomized crossover study in a university teaching hospital...
December 2016: Annals of Intensive Care
https://www.readbyqxmd.com/read/27003998/comparison-of-hepatic-venous-pressure-gradient-and-endoscopic-grading-of-esophageal-varices
#4
EunJi Lee, Yong Jae Kim, Dong Erk Goo, Seung Boo Yang, Hyun-Joo Kim, Jae Young Jang, Soung Won Jeong
AIM: To determine the correlation between the hepatic venous pressure gradient and the endoscopic grade of esophageal varices. METHODS: From September 2009 to March 2013, a total of 176 measurements of hepatic venous pressure gradient (HVPG) were done in 146 patients. Each transjugular HVPG was measured twice, first using an end whole catheter (EH-HVPG), and then using a balloon catheter (B-HVPG). The HVPG was compared with the endoscopic grade of esophageal varices (according to the general rules for recording endoscopic findings of esophagogastric varices), which was recorded within a month of the measurement of HVPG...
March 21, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/26868503/the-occlusion-tests-and-end-expiratory-esophageal-pressure-measurements-and-comparison-in-controlled-and-assisted-ventilation
#5
Davide Chiumello, Dario Consonni, Silvia Coppola, Sara Froio, Francesco Crimella, Andrea Colombo
BACKGROUND: Esophageal pressure is used as a reliable surrogate of the pleural pressure. It is conventionally measured by an esophageal balloon placed in the lower part of the esophagus. To validate the correct position of the balloon, a positive pressure occlusion test by compressing the thorax during an end-expiratory pause or a Baydur test obtained by occluding the airway during an inspiratory effort is used. An acceptable catheter position is defined when the ratio between the changes in esophageal and airway pressure (∆Pes/∆Paw) is close to unity...
December 2016: Annals of Intensive Care
https://www.readbyqxmd.com/read/26462086/pressurized-intraluminal-aerosol-chemotherapy-with-dbait-in-the-distal-esophagus-of-swine
#6
Nadja Khalili-Harbi, Nirmitha Herath, Wiebke Solass, Urs Giger-Pabst, Marie Dutreix, Marc Andre Reymond
BACKGROUND AND STUDY AIMS: A novel therapeutic concept, pressurized intraluminal aerosol chemotherapy (PILAC), and a corresponding device for distributing drugs to the mucosa and submucosa of the distal esophagus are presented. MATERIALS AND METHODS: The endoscopic device that was designed consisted of (i) a double-balloon catheter, similar to a Sengstaken-Blakemore tube; (ii) a carbon dioxide (CO2) line, used to create a gaseous, pressurized environment; and (iii) a micropump, used to generate a therapeutic aerosol...
February 2016: Endoscopy
https://www.readbyqxmd.com/read/26077619/response-characteristics-of-esophageal-balloon-catheters-handmade-using-latex-and-nonlatex-materials
#7
Troy J Cross, Sophie Lalande, Robert E Hyatt, Bruce D Johnson
The measurement of esophageal pressure allows for the calculation of several important and clinically useful parameters of respiratory mechanics. Esophageal pressure is often measured with balloon-tipped catheters. These catheters may be handmade from natural latex condoms and polyethylene tubing. Given the potential of natural latex to cause allergic reaction, it is important to determine whether esophageal catheter balloons can be fabricated, by hand, using nonlatex condoms as construction materials. To determine the static and dynamic response characteristics of esophageal balloon catheters handmade from latex and nonlatex materials, six esophageal catheter balloons were constructed from each of the following condom materials: natural latex, synthetic polyisoprene, and polyurethane (18 total)...
June 2015: Physiological Reports
https://www.readbyqxmd.com/read/25634481/esophageal-pressure-measurements-under-different-conditions-of-intrathoracic-pressure-an-in-vitro-study-of-second-generation-balloon-catheters
#8
F Mojoli, D Chiumello, M Pozzi, I Algieri, S Bianzina, S Luoni, C A Volta, A Braschi, L Brochard
BACKGROUND: The aim of this study was to evaluate in vitro the accuracy of second generation esophageal catheters at different surrounding pressures and filling volumes and to suggest appropriate catheter management in clinical practice. METHODS: Six different esophageal catheters were placed in an experimental chamber at four chamber pressures (0, 10, 20 and 30 cmH2O) and at filling volumes ranging from 0 to 10 mL. The working volume was defined as the volume range between the maximum (Vmax) and minimum (Vmin) volumes achieving acceptable accuracy (defined by a balloon transmural pressure ± 1 cmH2O)...
August 2015: Minerva Anestesiologica
https://www.readbyqxmd.com/read/25301894/differences-in-respiratory-muscle-activity-during-cycling-and-walking-do-not-influence-dyspnea-perception-in-obese-patients-with-copd
#9
Casey E Ciavaglia, Jordan A Guenette, Daniel Langer, Katherine A Webb, J Alberto Neder, Denis E O'Donnell
In patients with combined obesity and chronic obstructive pulmonary disease (COPD), dyspnea intensity at matched work rates during weight-supported cycling and weight-bearing walking is similar, despite consistent metabolic differences between test modalities. The present study examined the influence of differences in activity of the diaphragm and abdominal muscles during cycling and walking on intensity and quality of dyspnea at matched ventilation in obese patients with COPD. We compared respiratory muscle activity patterns and dyspnea ratings during incremental cycle and treadmill exercise tests, where work rate was matched, in 12 obese (body mass index 36...
December 1, 2014: Journal of Applied Physiology
https://www.readbyqxmd.com/read/25247308/liquid-and-air-filled-catheters-without-balloon-as-an-alternative-to-the-air-filled-balloon-catheter-for-measurement-of-esophageal-pressure
#10
Alessandro Beda, Andreas Güldner, Alysson R Carvalho, Walter Araujo Zin, Nadja C Carvalho, Robert Huhle, Antonio Giannella-Neto, Thea Koch, Marcelo Gama de Abreu
BACKGROUND: Measuring esophageal pressure (Pes) using an air-filled balloon catheter (BC) is the common approach to estimate pleural pressure and related parameters. However, Pes is not routinely measured in mechanically ventilated patients, partly due to technical and practical limitations and difficulties. This study aimed at comparing the conventional BC with two alternative methods for Pes measurement, liquid-filled and air-filled catheters without balloon (LFC and AFC), during mechanical ventilation with and without spontaneous breathing activity...
2014: PloS One
https://www.readbyqxmd.com/read/25212533/heart-lung-interactions-during-neurally-adjusted-ventilatory-assist
#11
COMPARATIVE STUDY
David Berger, Stefan Bloechlinger, Jukka Takala, Christer Sinderby, Lukas Brander
INTRODUCTION: Assist in unison to the patient's inspiratory neural effort and feedback-controlled limitation of lung distension with neurally adjusted ventilatory assist (NAVA) may reduce the negative effects of mechanical ventilation on right ventricular function. METHODS: Heart-lung interaction was evaluated in 10 intubated patients with impaired cardiac function using esophageal balloons, pulmonary artery catheters and echocardiography. Adequate NAVA level identified by a titration procedure to breathing pattern (NAVAal), 50% NAVAal, and 200% NAVAal and adequate pressure support (PSVal, defined clinically), 50% PSVal, and 150% PSVal were implemented at constant positive end-expiratory pressure for 20 minutes each...
September 12, 2014: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/25093961/rabbit-model-of-chest-wall-rigidity-induced-by-fentanyl-and-the-effects-of-apomorphine
#12
João Henrique Neves Soares, Robert J Brosnan, Andrea Smith, Philipp D Mayhew
A rabbit model for fentanyl-induced chest wall rigidity and the effect of apomorphine was evaluated. Eleven New Zealand adult rabbits were anesthetized and mechanically ventilated. An esophageal balloon catheter was used to estimate pleural pressure (P(pl)). Chest wall compliance (C(cw)) at baseline was calculated during pentobarbital anesthesia. A loading dose of 0.1 mg kg(-1) of fentanyl followed by infusion of 0.01 mg kg(-1) min(-1) was started in all animals, and C(cw) reassessed. In the rabbits that developed decreased C(cw), apomorphine 0...
October 1, 2014: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/24892946/alteration-in-the-lower-limit-of-autoregulation-with-elevations-in-cephalic-venous-pressure
#13
Derek Nusbaum, Jonathan Clark, Kenneth Brady, Kathleen Kibler, Jeffrey Sutton, Ronald Blaine Easley
OBJECTIVES: Recent studies suggest that elevated intracranial pressure (ICP), created by hydrocephalus, can alter the lower limit of cerebrovascular autoregulation (LLA). Our objective in the present study was to determine if ICP elevation from cerebral venous outflow obstruction would result in comparable alterations in the LLA. METHODS: Anesthetized juvenile pigs were assigned to one of two groups: naïve ICP (n  =  15) or high ICP (>20 mmHg; n  =  20)...
December 2014: Neurological Research
https://www.readbyqxmd.com/read/24798128/management-of-stomal-varices-with-transvenous-obliteration-utilizing-sodium-tetradecyl-sulfate-foam-sclerosis
#14
Wael E A Saad, Sandra Schwaner, Allison Lippert, Saher S Sabri, Abdullah Al-Osaimi, Alan H Matsumoto, John F Angle, Stephen Caldwell
The management of parastomal varices is not established. Transjugular intrahepatic portosystemic shunt (TIPS) creation is the most commonly described treatment; however, the rebleed rate after TIPS is 21-37%. The purpose of the study is to determine the effectiveness of transvenous obliteration using sodium tetradecyl sulfate (STS) and to describe a new simplified technique in obliterating these varices. Four patients are presented who underwent transvenous obliteration using STS. One was obliterated using balloon occlusion from the systemic veins, the second was obliterated without balloon from a transhepatic antegrade approach, and the last two patients were obliterated using the direct antegrade technique...
December 2014: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/24482727/simple-strategy-of-anesthesia-for-the-neonate-with-tracheoesophageal-fistula-a-case-report
#15
Yang Ni, Yusheng Yao, Peng Liang
A 3-day-old neonate, given a diagnosis of esophageal atresia (EA) with tracheoesophageal fistula (TEF), which is large and just above the carina, was scheduled for TEF repair. Routine anesthetic management focuses on adequate ventilation and avoidance of gastric distension during positive pressure ventilation. Using a balloon-tipped embolectomy catheter or a Fogarty catheter to block the fistula under the guidance of fiberoptic scope has been described. In most of the medical centers, however, the pediatric fiberoptic scope may not be available...
2014: International Journal of Clinical and Experimental Medicine
https://www.readbyqxmd.com/read/24467647/the-application-of-esophageal-pressure-measurement-in-patients-with-respiratory-failure
#16
REVIEW
Evangelia Akoumianaki, Salvatore M Maggiore, Franco Valenza, Giacomo Bellani, Amal Jubran, Stephen H Loring, Paolo Pelosi, Daniel Talmor, Salvatore Grasso, Davide Chiumello, Claude Guérin, Nicolo Patroniti, V Marco Ranieri, Luciano Gattinoni, Stefano Nava, Pietro-Paolo Terragni, Antonio Pesenti, Martin Tobin, Jordi Mancebo, Laurent Brochard
This report summarizes current physiological and technical knowledge on esophageal pressure (Pes) measurements in patients receiving mechanical ventilation. The respiratory changes in Pes are representative of changes in pleural pressure. The difference between airway pressure (Paw) and Pes is a valid estimate of transpulmonary pressure. Pes helps determine what fraction of Paw is applied to overcome lung and chest wall elastance. Pes is usually measured via a catheter with an air-filled thin-walled latex balloon inserted nasally or orally...
March 1, 2014: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/24440333/comparison-of-force-exerted-on-the-sternum-during-a-sneeze-versus-during-low-moderate-and-high-intensity-bench-press-resistance-exercise-with-and-without-the-valsalva-maneuver-in-healthy-volunteers
#17
Jenny Adams, Jack Schmid, Robert D Parker, J Richard Coast, Dunlei Cheng, Aaron D Killian, Stephanie McCray, Danielle Strauss, Sandra McLeroy Dejong, Rafic Berbarie
Sternal precautions are intended to prevent complications after median sternotomy, but little data exist to support the consensus recommendations. To better characterize the forces on the sternum that can occur during everyday events, we conducted a prospective nonrandomized study of 41 healthy volunteers that evaluated the force exerted during bench press resistance exercise and while sneezing. A balloon-tipped esophageal catheter, inserted through the subject's nose and advanced into the thoracic cavity, was used to measure the intrathoracic pressure differential during the study activities...
March 15, 2014: American Journal of Cardiology
https://www.readbyqxmd.com/read/24381189/assessing-respiratory-function-depends-on-mechanical-characteristics-of-balloon-catheters
#18
Stephan Walterspacher, Lilli Isaak, Josef Guttmann, Hans-Joachim Kabitz, Stefan Schumann
BACKGROUND: Respiratory muscle function and lung and chest wall mechanics are reliably assessed by esophageal and gastric balloon catheters. The aim of this in vitro bench study was to assess the mechanical properties of commercially available balloon catheters using an experimental model with 3 defined compliances (27, 54, 90 mL/cm H2O). METHODS: Six catheters were investigated in 4 conditions: (1) balloon pressure during initial inflation, (2) static pressure measurements at different filling volumes, (3) estimation of set compliances in the experimental lung model at different levels of superimposed pressure, and (4) elastic balloon properties after 16 h of inflation...
September 2014: Respiratory Care
https://www.readbyqxmd.com/read/24356524/physiological-mechanisms-of-dyspnea-during-exercise-with-external-thoracic-restriction-role-of-increased-neural-respiratory-drive
#19
RANDOMIZED CONTROLLED TRIAL
Cassandra T Mendonca, Michele R Schaeffer, Patrick Riley, Dennis Jensen
We tested the hypothesis that neuromechanical uncoupling of the respiratory system forms the mechanistic basis of dyspnea during exercise in the setting of "abnormal" restrictive constraints on ventilation (VE). To this end, we examined the effect of chest wall strapping (CWS) sufficient to mimic a "mild" restrictive lung deficit on the interrelationships between VE, breathing pattern, dynamic operating lung volumes, esophageal electrode-balloon catheter-derived measures of the diaphragm electromyogram (EMGdi) and the transdiaphragmatic pressure time product (PTPdi), and sensory intensity and unpleasantness ratings of dyspnea during exercise...
March 1, 2014: Journal of Applied Physiology
https://www.readbyqxmd.com/read/24149695/the-effect-of-core-exercises-on-transdiaphragmatic-pressure
#20
Lisa M Strongoli, Christopher L Gomez, J Richard Coast
Abdominal exercises, such as sit ups and leg lifts, are used to enhance strength of the core muscles. An overlooked aspect of abdominal exercises is the compression the abdomen, leading to increased diaphragmatic work. We hypothesized that core exercises would produce a variety of transdiaphragmatic pressures. We also sought to determine if some of the easy exercises would produce pressures sufficient for a training stimulus to the diaphragm. We evaluated the effect of 13 different abdominal exercises, ranging in difficulty, on transdiaphragmatic pressure (Pdi), an index of diaphragmatic activity...
2010: Journal of Sports Science & Medicine
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