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airway leaking test

Carolina Meira, Fabiola B Joerger, Annette P N Kutter, Andreas Waldmann, Simone K Ringer, Stephan H Böehm, Samuel Iff, Martina Mosing
OBJECTIVE: To compare the efficacy of three continuous positive airway pressure (CPAP) interfaces in dogs on gas exchange, lung volumes, amount of leak during CPAP and rebreathing in case of equipment failure or disconnection. STUDY DESIGN: Randomized, prospective, crossover, experimental trial. ANIMALS: Ten purpose-bred Beagle dogs. METHODS: Dogs were in dorsal recumbency during medetomidine-propofol constant rate infusions, breathing room air...
December 5, 2017: Veterinary Anaesthesia and Analgesia
Said Benlamkaddem, Mohamed Adnane Berdai, Smael Labib, Mustapha Harandou
Spontaneous pneumomediastinum is defined as free air or gas contained within the mediastinum, which almost invariably originates from the alveolar space or the conducting airways. It is rare in pediatric patients; however, occasional cases are reported to result from forced Valsalva's maneuver due to cough, emesis, a first attack of wheeze, or asthma exacerbations. We report the case of a 7-year-old previously healthy girl, with a history of persistent dry cough one day before, who was brought to our unit with face, neck and chest swelling...
February 7, 2018: Children
Ravindra M Mehta, Abhinav Singla, Rajani S Bhat, Rakesh Godara, Chakravarthi Lokanath, Michael Cutaia
BACKGROUND: Prolonged air leak (PAL) is a life-threatening condition that can present either as bronchopleural fistula, or alveolar-pleural fistula (APF). Although numerous bronchoscopic treatments are described, they are either expensive, not widely available in the developing world or have limited success. We describe our experience with a novel customized endobronchial silicone blocker (CESB) for PAL treatment. METHODS: This is a retrospective study of PAL patients who underwent CESB placement...
January 16, 2018: Journal of Bronchology & Interventional Pulmonology
Ankur Dhanda, Shalendra Singh, Anju R Bhalotra, Siddharth Chavali
Objective: Recently, there has been a trend favouring the use of supraglottic airway devices over endotracheal tubes (ETT) during short surgical procedures. In this study, we are going to assess the suitability of one such supraglottic airway device, i-gel, for pressure-controlled ventilation (PCV) during routine surgical procedures. Methods: The airway management for 60 patients was done with either i-gel (Group I) or cuffed tracheal tube (Group E) for this prospective, randomised, double-blinded study...
October 2017: Turkish Journal of Anaesthesiology and Reanimation
Hiroko Nishioka, Yutaka Usuda, Go Hirabayashi, Koichi Maruyama, Tomio Andoh
BACKGROUND: Lubrication of cuffed tracheal tubes (CTTs) reduces liquid leakage. However, it is not clear how cuff lubrication influences air leakage. We aimed to test the hypothesis that pretreatment with K-Y jelly, a water-soluble lubricant, would improve the air-sealing performance of pediatric CTTs in a model study. METHODS: We placed Parker Flex-Tip™ CTT with 4.0- and 5.0-mm internal diameter (ID) into a tracheal model with 9- and 12-mm ID. The tracheal model was connected to a test lung ventilated in pressure control mode...
September 19, 2017: BMC Anesthesiology
Maren Kleine-Brueggeney, Anne Gottfried, Sabine Nabecker, Robert Greif, Malte Book, Lorenz Theiler
BACKGROUND: Supraglottic airway devices (SGA) are commonly used in pediatric anesthesia and serve as primary or back-up devices for difficult airway management. Most SGA are marketed without proper clinical evaluation. The purpose of this study was to evaluate the performance of the pediatric LMA Supreme™, Air-Q® and Ambu® Aura-i™. METHODS: This prospective observational study was performed at Bern University Hospital, Switzerland. With ethics committee approval and a waiver for written informed consent 240 children undergoing elective surgery with an ASA class I-III and a weight of 5-30 kg were included...
September 2, 2017: BMC Anesthesiology
Mark Brian Tracy, Archana Priyadarshi, Dimple Goel, Krista Lowe, Jacqueline Huvanandana, Murray Hinder
BACKGROUND: International neonatal resuscitation guidelines recommend the use of laryngeal mask airway (LMA) with newborn infants (≥34 weeks' gestation or >2 kg weight) when bag-mask ventilation (BMV) or tracheal intubation is unsuccessful. Previous publications do not allow broad LMA device comparison. OBJECTIVE: To compare delivered ventilation of seven brands of size 1 LMA devices with two brands of face mask using self-inflating bag (SIB). DESIGN: 40 experienced neonatal staff provided inflation cycles using SIB with positive end expiratory pressure (PEEP) (5 cmH2O) to a specialised newborn/infant training manikin randomised for each LMA and face mask...
August 11, 2017: Archives of Disease in Childhood. Fetal and Neonatal Edition
Jagadish G Sutagatti, Ranjana Raja, Madhuri S Kurdi
INTRODUCTION: Choosing the correct Endotracheal Tube (ETT) size is important in paediatric anaesthesia. The subglottic diameter being the narrowest diameter of the paediatric upper airway plays an important role in appropriate ETT size selection. AIM: This study was planned to determine the accuracy of Ultrasonography (USG) to assess the appropriate ETT size and compare it with physical indices based formulae. The secondary outcome was to assess the number of times the tube was changed based on air leak test for USG estimated tube size...
May 2017: Journal of Clinical and Diagnostic Research: JCDR
Sheila Nainan Myatra, Vijaykumar Khandale, Friedrich Pühringer, Sushan Gupta, Sohan Lal Solanki, Jigeeshu V Divatia
BACKGROUND AND AIMS: The ProSeal™ laryngeal mask airway (PLMA) has a soft cuff which tends to fold on itself during insertion, resulting in reduced first-attempt success rate. We compared the standard introducer technique of PLMA insertion with a novel method to prevent folding of the cuff using a Rüsch™ Stylet. METHODS: This randomised superiority trial included 120 American Society of Anesthesiologists I-II patients between 18 and 80 years, undergoing elective surgeries under general anaesthesia using a PLMA for airway management...
June 2017: Indian Journal of Anaesthesia
Kriti Singh, Pavan Gurha
BACKGROUND AND AIMS: Second generation supraglottic airways are increasingly being used in surgical patients undergoing laparoscopic surgery. Preventing aspiration at higher airway pressures may be at the expense of a higher cuff pressure which can impair mucosal perfusion. We attempted to elucidate whether Ambu AuraGain™ (AAU) would provide a higher oropharyngeal leak pressure (OLP) with a lower mucosal pressure in comparison to ProSeal™ laryngeal mask airway (PLMA). METHODS: This was a prospective randomised study involving sixty patients undergoing laparoscopic cholecystectomy under general anaesthesia, using either AAU (Group AAU [n = 30]) or PLMA (Group PLMA [n = 30]) for elective ventilation...
June 2017: Indian Journal of Anaesthesia
Meltem Genez, Semih Küçükgüçlü, Şule Özbilgin, Bahar Kuvaki, Tangül Beydeş, Melek Aksoy Sari
BACKGROUND/AIM: Mask ventilation in geriatric and edentulous patients can be ineffective or even impossible because of the shape inside the patients' cheeks. For patients for whom a mask cannot be used for long, the use of a laryngeal mask can ease the administration of anesthesia. The aim of this study was to compare the use of the laryngeal mask Unique(TM) in denticulate and edentulate patients aged over 65 years. MATERIALS AND METHODS: This prospective study included patients according to the American Society of Anesthesiologists I-III classification, aged 65 years or more...
June 12, 2017: Turkish Journal of Medical Sciences
Sohan Lal Solanki, Jeson R Doctor, Kamlesh K Shekhawat, Sheila Nainan Myatra, Malini Joshi, Jigeeshu V Divatia
BACKGROUND AND AIMS: The ProSeal™ laryngeal mask airway (PLMA) has advantages of providing better cuff seal and the presence of a gastric drain tube. The manufacturer recommends actual body weight (ABW) for size selection. Pharyngeal area reduces with increase in body mass index (BMI); hence, in overweight patients, PLMA selected on ABW may not fit well. We hypothesised that the ideal body weight (IBW) would be more appropriate in size selection of PLMA. METHODS: This randomised, single-blind study included 124 patients of 20-60 years and American Society of Anesthesiologists Class I-II, with BMI >25...
May 2017: Indian Journal of Anaesthesia
Stephen C John, Joseph D Barnett, Nickolas D Habben, Hoa T Le, Eric Cheng, Sunil P John, Peter A Gustafson
BACKGROUND: Neonatal respiratory distress results in > 1 million annual deaths worldwide. Bubble CPAP is a simple, effective, and widely used therapy for infants in respiratory distress. In low-resource settings, more advanced respiratory support is limited by cost, technical expertise, and sporadic electricity. We sought to develop a safe, inexpensive, and simple solution to provide further respiratory support for these infants. METHODS: A standard bubble CPAP system was modified to provide 2 levels of positive airway pressure (bi-level positive airway pressure) by attaching a novel device...
September 2017: Respiratory Care
Donna M White, José I Redondo, Alastair R Mair, Fernando Martinez-Taboada
OBJECTIVE: The effect of user experience and inflation technique on endotracheal tube cuff pressure using a feline airway simulator. STUDY DESIGN: Prospective, experimental clinical study. METHODS: Participants included veterinary students at the beginning (group S1) and end (group S2) of their 2-week anaesthesia rotation and veterinary anaesthetists (group A). The feline airway simulator was designed to simulate an average size feline trachea, intubated with a 4...
September 2017: Veterinary Anaesthesia and Analgesia
Senthil G Krishna, Mumin Hakim, Roby Sebastian, Heather L Dellinger, Dmitry Tumin, Joseph D Tobias
BACKGROUND: In children, the size of the cuffed endotracheal tube is based on various age-based formulas. However, such formulas may over or underestimate the size of the cuffed endotracheal tube. There are no data on the impact of different-sized cuffed endotracheal tubes (ETT) on the intracuff pressure in children. AIM: The current study measures intracuff pressure with different-sized cuffed ETT. METHOD: The study was conducted in an in vitro and in vivo phase...
May 2017: Paediatric Anaesthesia
Marc Kriege, Christian Alflen, Johannes Eisel, Thomas Ott, Tim Piepho, Ruediger R Noppens
BACKGROUND: Recent case reports have indicated significant cuff overinflation when using the standard filling volume based on the manufacturer's recommendations in older models of laryngeal tubes. The aim of this study was to determine the minimum cuff pressure needed to perform standardized ventilation without leakage in the new, revised model of the laryngeal tube "LTS-D". METHODS: After ethical approval, LTS-D was placed for ventilation in 60 anesthetized patients...
February 2, 2017: BMC Anesthesiology
Yuda Sutherasan, Lorenzo Ball, Pasquale Raimondo, Valentina Caratto, Elisa Sanguineti, Federico Costantino, Maurizio Ferretti, Robert M Kacmarek, Paolo Pelosi
BACKGROUND: Few studies have investigated the factors affecting aerosol delivery during non-invasive ventilation (NIV). Our aim was to investigate, using a bench-top model, the effect of different ventilator settings and positions of the exhalation port and nebulizer on the amount of albuterol delivered to a lung simulator. METHODS: A lung model simulating spontaneous breathing was connected to a single-limb NIV ventilator, set in bi-level positive airway pressure (BIPAP) with inspiratory/expiratory pressures of 10/5, 15/10, 15/5, and 20/10 cmH2O, or continuous positive airway pressure (CPAP) of 5 and 10 cmH2O...
January 10, 2017: BMC Pulmonary Medicine
Katsuhiro Okuda, Ryoichi Nakanishi
Surgical treatment for lung cancer including airway resection following reconstruction is typically performed under general anesthesia with single-lung ventilation because it is necessary to maintain a sufficient working space and to adjust the airway pressure for the leak test. However, non-intubated thoracic surgery has been gradually developed in recent years for thoracoscopic surgery, due to its lower rate of postoperative complications, shorter hospitalization duration, and lower invasiveness than the usual single-lung anesthesia...
November 2016: Journal of Thoracic Disease
Hendrik S Fischer, Tim L Ullrich, Christoph Bührer, Christoph Czernik, Gerd Schmalisch
Clinical studies show that non-invasive respiratory support by continuous positive airway pressure (CPAP) affects gas conditioning in the upper airways, especially in the presence of mouth leaks. Using a new bench model of neonatal CPAP, we investigated the influence of mouth opening on oropharyngeal temperature and humidity. The model features the insertion of a heated humidifier between an active model lung and an oropharyngeal head model to simulate the recurrent expiration of heated, humidified air. During unsupported breathing, physiological temperature and humidity were attained inside the model oropharynx, and mouth opening had no significant effect on oropharyngeal temperature and humidity...
February 2017: Medical Engineering & Physics
Maliheh Kadivar, Ziba Mosayebi, Nosrat Razi, Shahin Nariman, Razieh Sangsari
BACKGROUND: In recent years, various noninvasive respiratory support (NRS) of ventilation has been provided more in neonates. The aim of this study was to compare the effect of HFNC with NCPAP in post-extubation of preterm infants with RDS after INSURE method (intubation, surfactant, extubation). METHODS: A total of 54 preterm infants with RDS (respiratory distress syndrome) were enrolled in this study. Using a randomized sequence, they were assigned into two groups after INSURE method...
November 2016: Iranian Journal of Medical Sciences
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