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Peak inspiratory pressure

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https://www.readbyqxmd.com/read/28329099/effect-of-sleeping-position-on-upper-airway-patency-in-obstructive-sleep-apnea-is-determined-by-the-pharyngeal-structure-causing-collapse
#1
Melania Marques, Pedro R Genta, Scott A Sands, Ali Azarbazin, Camila de Melo, Luigi Taranto-Montemurro, David P White, Andrew Wellman
Objectives: In some patients, obstructive sleep apnea (OSA) can be resolved with improvement in pharyngeal patency by sleeping lateral rather than supine, possibly as gravitational effects on the tongue are relieved. Here we tested the hypothesis that the improvement in pharyngeal patency depends on the anatomical structure causing collapse, with patients with tongue-related obstruction and epiglottic collapse exhibiting preferential improvements. Methods: Twenty-four OSA patients underwent upper airway endoscopy during natural sleep to determine the pharyngeal structure associated with obstruction, with simultaneous recordings of airflow and pharyngeal pressure...
January 31, 2017: Sleep
https://www.readbyqxmd.com/read/28298784/ventilation-of-nonparalyzed-patients-under-anesthesia-with-laryngeal-mask-airway-comparison-of-three-modes-of-ventilation-volume-controlled-ventilation-pressure-controlled-ventilation-and-pressure-controlled-ventilation-volume-guarantee
#2
Maroun Badwi Ghabach, Elie M El Hajj, Rouba D El Dib, Jeanette M Rkaiby, May S Matta, May R Helou
BACKGROUND: Pressure controlled ventilation (PCV) is the preferable mode of ventilation of nonparalyzed patients undergoing anesthesia with laryngeal mask airway (LMA) as compared to volume controlled ventilation (VCV) and spontaneously breathing patient. In this study, we compared the PC-volume guarantee (PC-VG) mode of ventilation with VCV and PCV modes. MATERIALS AND METHODS: A total of 30 patients, American Society of Anesthesiologists (ASA) physical status Classes I and II, scheduled for elective surgery under general anesthesia with a classic LMA were ventilated, subsequently, with the three modes of ventilation: VCV, PCV, and PC-VG for 10 min each mode...
January 2017: Anesthesia, Essays and Researches
https://www.readbyqxmd.com/read/28284189/changes-in-intraocular-pressure-and-optic-nerve-sheath-diameter-in-patients-undergoing-robotic-assisted-laparoscopic-prostatectomy-in-steep-45%C3%A2-trendelenburg-position
#3
Sebastian Blecha, Marion Harth, Felix Schlachetzki, Florian Zeman, Christiane Blecha, Pierre Flora, Maximilian Burger, Stefan Denzinger, Bernhard M Graf, Horst Helbig, Michael T Pawlik
BACKGROUND: To evaluate changes in intraocular pressure (IOP) and intracerebral pressure (ICP) reflected by the optic nerve sheath diameter (ONSD) in patients undergoing robotic-assisted laparoscopic prostatectomy (RALP) in permanent 45° steep Trendelenburg position (STP). METHODS: Fifty-one patients undergoing RALP under a standardised anaesthesia. IOP was perioperatively measured in awake patients (T0) and IOP and ONSD 20 min after induction of anaesthesia (T1), after insufflation of the abdomen in supine position (T2), after 30 min in STP (T3), when controlling Santorini's plexus in STP (T4) and before awakening while supine (T5)...
March 11, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/28284044/diaphragm-thickness-and-inspiratory-muscle-functions-in-chronic-stroke-patients
#4
Minkyu Kim, Kyeongbong Lee, Jieun Cho, Wanhee Lee
BACKGROUND The aims of this study are to investigate the difference between the diaphragm thickness at end expiration and the thickness at total lung capacity (TLC), and to examine differences in inspiratory muscle function between stroke patients and healthy individuals. MATERIAL AND METHODS Forty-five stroke patients and 49 healthy volunteers were included in this study. Diaphragm thickness was measured at end expiration and at TLC by ultrasonography. The maximal inspiratory pressure (MIP), peak inspiratory flow (PIF), vital capacity (VC), and inspiratory muscle endurance (IME) were assess to evaluate inspiratory muscle function...
March 11, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28278163/the-role-of-the-inspiratory-muscle-weakness-in-functional-capacity-in-hemodialysis-patients
#5
Pedro Henrique Scheidt Figueiredo, Márcia Maria Oliveira Lima, Henrique Silveira Costa, Rosalina Tossige Gomes, Camila Danielle Cunha Neves, Evandro Silveira de Oliveira, Frederico Lopes Alves, Vanessa Gomes Brandão Rodrigues, Emílio Henrique Barroso Maciel, Cláudio Heitor Balthazar
INTRODUCTION: Inspiratory muscle function may be affected in patients with End-Stage Renal Disease (ESRD), further worsening the functional loss in these individuals. However, the impact of inspiratory muscle weakness (IMW) on the functional capacity (FC) of hemodialysis patients remains unknown. Thus, the present study aimed to evaluate the impact of IMW on FC in ESRD patients undergoing hemodialysis. MATERIALS AND METHODS: ESRD patients on hemodialysis treatment for more than six months were evaluated for inspiratory muscle strength and FC...
2017: PloS One
https://www.readbyqxmd.com/read/28277322/utilizing-forced-vital-capacity-to-predict-low-lung-compliance-and-select-intraoperative-tidal-volume-during-thoracic-surgery
#6
Nir Hoftman, Eric Eikermann, John Shin, Jack Buckley, Kaveh Navab, Fereidoun Abtin, Tristan Grogan, Maxime Cannesson, Aman Mahajan
BACKGROUND: Tidal volume selection during mechanical ventilation utilizes dogmatic formulas that only consider a patient's predicted body weight (PBW). In this study, we investigate whether forced vital capacity (FVC) (1) correlates better to total lung capacity (TLC) than PBW, (2) predicts low pulmonary compliance, and (3) provides an alternative method for tidal volume selection. METHODS: One hundred thirty thoracic surgery patients had their preoperative TLC calculated via 2 methods: (1) pulmonary function test (PFT; TLCPFT) and (2) computed tomography 3D reconstruction (TLCCT)...
March 8, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28275464/respiratory-rate-and-peak-inspiratory-pressure-new-targets-from-the-lung-safe-study-analysis-or-physiopathological-artifacts
#7
EDITORIAL
Christophe Guervilly, Jean Marie Forel, Laurent Papazian
No abstract text is available yet for this article.
February 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28272226/different-characteristics-of-ventilator-application-between-tracheostomy-and-noninvasive-positive-pressure-ventilation-patients-with-amyotrophic-lateral-sclerosis
#8
Donghwi Park, Goo Joo Lee, Ha Young Kim, Ju Seok Ryu
The aim of the study was to investigate the appropriate home ventilator settings for patients with amyotrophic lateral sclerosis (ALS).In total, 71 patients with ALS, who had received either a noninvasive positive pressure ventilation (NIPPV) or tracheostomy positive pressure ventilation (TPPV), were included. Accordingly, patients were divided into 2 groups (the TPPV and NIPPV groups). We retrospectively evaluated the values used in home ventilators for patients with ALS, who had maintained a stable level of CO2 on both the arterial blood gas analysis (ABGA) and transcutaneous blood gas monitoring...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28265153/comparison-of-differences-in-respiratory-function-and-pressure-as-a-predominant-abnormal-movement-of-children-with-cerebral-palsy
#9
Hae-Yeon Kwon
[Purpose] The purpose of this study was to determine differences in respiratory function and pressure among three groups of children with cerebral palsy as a predominant abnormal movement which included spastic type, dyskinetic type, and ataxic type. [Subjects and Methods] Forty-three children with cerebral palsy of 5-13 years of age in I-III levels according to the Gross Motor Function Classification System, the study subjects were divided by stratified random sampling into three groups of spastic type, dyskinetic type, and ataxic type...
February 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28255086/mechanisms-of-the-deep-slow-wave-sleep-related-increase-of-upper-airway-muscle-tone-in-healthy-humans
#10
Amelia Hicks, Jennifer M Cori, Amy S Jordan, Christian L Nicholas, Leszek Kubin, John G Semmler, Atul Malhotra, David Gerard Peter McSharry, John A Trinder
Upper airway muscle activity is reportedly elevated during slow-wave sleep (SWS) when compared to lighter sleep stages. To uncover the possible mechanisms underlying this elevation, we explored the correlation between different indices of central and reflex inspiratory drive, such as the changes in airway pressure and end-expiratory CO2, and the changes in the genioglossus (GG) and tensor palatini (TP) muscle activity accompanying transitions from the lighter N2 to the deeper N3 stage of non-rapid eye movement (NREM) sleep in healthy young adult men...
March 2, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28244940/elevated-mean-airway-pressure-and-central-venous-pressure-in-the-first-day-of-mechanical-ventilation-indicated-poor-outcome
#11
Yun Long, Longxiang Su, Qing Zhang, Xiang Zhou, Hao Wang, Na Cui, Wenzhao Chai, Xiaoting Wang, Xi Rui, Dawei Liu
OBJECTIVES: The relationship between respiratory mechanical parameters and hemodynamic variables remains unclear. This study was performed to determine whether mean airway pressure and central venous pressure in the first day of mechanical ventilation are associated with patient outcomes. DESIGN: Retrospective first 24-hour comparison during ICU stay. SETTING: The Department of Critical Care Medicine of Peking Union Medical College Hospital...
February 27, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28243966/robustness-of-two-different-methods-of-monitoring-respiratory-system-compliance-during-mechanical-ventilation
#12
Gaetano Perchiazzi, Christian Rylander, Mariangela Pellegrini, Anders Larsson, Göran Hedenstierna
Robustness measures the performance of estimation methods when they work under non-ideal conditions. We compared the robustness of artificial neural networks (ANNs) and multilinear fitting (MLF) methods in estimating respiratory system compliance (C RS) during mechanical ventilation (MV). Twenty-four anaesthetized pigs underwent MV. Airway pressure, flow and volume were recorded at fixed intervals after the induction of acute lung injury. After consecutive mechanical breaths, an inspiratory pause (BIP) was applied in order to calculate CRS using the interrupter technique...
February 27, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28237681/assessment-of-distribution-of-ventilation-and-regional-lung-compliance-by-electrical-impedance-tomography-in-anaesthetized-horses-undergoing-alveolar-recruitment-manoeuvres
#13
Tamas D Ambrisko, Johannes Schramel, Klaus Hopster, Sabine Kästner, Yves Moens
OBJECTIVE: To examine changes in the distribution of ventilation and regional lung compliances in anaesthetized horses during the alveolar recruitment manoeuvre (ARM). STUDY DESIGN: Experimental study in which a series of treatments were administered in a fixed order on one occasion. ANIMALS: Five adult Warmblood horses. METHODS: Animals were anaesthetized (xylazine, midazolam-ketamine, isoflurane), placed in dorsal recumbency and ventilated with 100% oxygen using peak inspiratory pressure (PIP) and positive end-expiratory pressure (PEEP) of 20 cmH2O and 0 cmH2O, respectively...
January 12, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28184267/prediction-of-endotracheal-tube-size-for-pediatric-patients-from-the-epiphysis-diameter-of-radius
#14
Hee Young Kim, Ji Hyun Cheon, Seung Hoon Baek, Kyung Hoon Kim, Tae Kyun Kim
BACKGROUND: Using a too big or a too small size of an endotracheal tube in pediatric patients would result in tracheal injury or insufficient ventilation. Determining the appropriate endotracheal tube size is important because using an inappropriate size can cause complications. This study was performed to predict the appropriate endotracheal tube size by measuring the transverse diameter of the epiphysis of the distal radius under the assumption that the growth rates of cartilages in the entire body are close to each other...
February 2017: Korean Journal of Anesthesiology
https://www.readbyqxmd.com/read/28144134/evaluation-of-carbon-dioxide-rebreathing-during-exercise-assisted-by-noninvasive-ventilation-with-plateau-exhalation-valve
#15
Yong-Er Ou, Zhi-Min Lin, Dong-Ming Hua, Ying Jiang, Ya-Ting Huo, Qun Luo, Rong-Chang Chen
Noninvasive ventilation with a plateau exhalation valve (PEV) is often used as an adjunct to exercise to achieve a physiologic training effect in severe chronic obstructive pulmonary disease (COPD) patients. However, during exercise, with the increase of exhalation flow and respiratory rate and limited capability of PEV to exhale gases out of the circuit, it is still unknown whether CO2 rebreathing occurs in COPD patients ventilated during exercise assisted by single-limb circuit with a PEV. A maximal symptom-limited cycle exercise test was performed while ventilated on pressure support (inspiratory:expiratory pressure 14:4 cmH2O) in 18 male patients with stable severe COPD (mean ± standard deviation, forced expiratory volume in 1 s: 29...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28124234/dynamic-driving-pressure-associated-mortality-in-acute-respiratory-distress-syndrome-with-extracorporeal-membrane-oxygenation
#16
Li-Chung Chiu, Han-Chung Hu, Chen-Yiu Hung, Chih-Hao Chang, Feng-Chun Tsai, Cheng-Ta Yang, Chung-Chi Huang, Huang-Pin Wu, Kuo-Chin Kao
BACKGROUND: The survival predictors and optimal mechanical ventilator settings in patients with severe acute respiratory distress syndrome (ARDS) undergoing extracorporeal membrane oxygenation (ECMO) are uncertain. This study was designed to investigate the influences of clinical variables and mechanical ventilation settings on the outcomes for severe ARDS patients receiving ECMO. METHODS: We reviewed severe ARDS patients who received ECMO due to refractory hypoxemia from May 2006 to October 2015...
December 2017: Annals of Intensive Care
https://www.readbyqxmd.com/read/28116675/anesthetic-considerations-for-patients-with-esophageal-achalasia-undergoing-peroral-endoscopic-myotomy-a-retrospective-case-series-review
#17
Benjamin Löser, Yuki B Werner, Mark A Punke, Bernd Saugel, Sebastian Haas, Daniel A Reuter, Oliver Mann, Anna Duprée, Guido Schachschal, Thomas Rösch, Martin Petzoldt
PURPOSE: Peroral endoscopic myotomy (POEM) is a novel technique for treating esophageal achalasia. During POEM, carbon dioxide (CO2) is insufflated to aid surgical dissection, but it may inadvertently track into surrounding tissues, causing systemic CO2 uptake and tension capnoperitoneum. This in turn may affect cardiorespiratory function. This study quantified these cardiorespiratory effects and treatment by hyperventilation and percutaneous abdominal needle decompression (PND). METHODS: One hundred and seventy-three consecutive patients who underwent POEM were included in this four-year retrospective study...
January 23, 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/28108076/safety-and-effectiveness-of-alveolar-recruitment-maneuvers-and-positive-end-expiratory-pressure-during-general-anesthesia-for-cesarean-section-a-prospective-randomized-trial
#18
D Aretha, F Fligou, P Kiekkas, C Messini, E Panteli, E Zintzaras, M Karanikolas
INTRODUCTION: During cesarean section, the supine position reduces functional residual capacity and worsens lung compliance. We tested the hypothesis that alveolar recruitment maneuvers and positive end-expiratory pressure improve lung compliance in women undergoing general anesthesia for cesarean section. METHODS: Ninety women undergoing cesarean section were randomly assigned to one of two groups in a prospective, double-blind trial. In the alveolar recruitment maneuver group, pressure-control ventilation was used and inspiratory time was increased to 50% after delivery; positive end-expiratory pressure was increased to 20cmH2O and peak airway inspiratory pressure gradually increased to 45-50cmH2O...
December 23, 2016: International Journal of Obstetric Anesthesia
https://www.readbyqxmd.com/read/28094413/electrical-impedance-tomography-for-lung-ventilation-monitoring-of-the-dog
#19
Simon Gloning, Korbinian Pieper, Martin Zoellner, Andrea Meyer-Lindenberg
BACKGROUND: Electrical impedance tomography (EIT) is a radiation free technique which takes advantage of the different electrical conductivities of different tissues. Its main field of application is lung ventilation monitoring. The aim of this prospective study was to evaluate the feasibility of collecting EIT information on a sample of dogs with different thoracic shapes under clinical conditions by connecting an electrode belt without fur clipping. MATERIAL AND METHODS: Fifteen pulmonary healthy dogs were anaesthetized, positioned in sternal recumbency and ventilated in a pressure-controlled mode at three different positive end-expiratory pressure levels (PEEP) of 0, 5 and 10 cmH2O for five breaths each, with a peak inspiratory pressure of 15 cmH2O...
February 9, 2017: Tierärztliche Praxis. Ausgabe K, Kleintiere/Heimtiere
https://www.readbyqxmd.com/read/28057838/temporal-evolution-of-thoracocentesis-induced-changes-in-spirometry-and-respiratory-muscle-pressures
#20
Stylianos A Michaelides, George D Bablekos, Antonis Analitis, George Ionas, Petros Bakakos, Konstantinos A Charalabopoulos
BACKGROUND: Several studies investigated the effects of thoracocentesis on aspects of respiratory function without generally ensuring absence of coexistent lung pathology or homogeneity in initial size of the effusion. METHODS: We studied 90 patients aged 61.6±15.9 years (mean±SD) separated into a group A with small-sized or medium-sized effusion (A=56 patients) and a group B with large and massive one (B=34 patients). There was no significant lung lesion or cardiovascular pathology...
January 5, 2017: Postgraduate Medical Journal
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