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Keywords cuff volume and size laryngeal...

cuff volume and size laryngeal mask Airway

https://read.qxmd.com/read/19227175/-use-of-the-laryngeal-mask-airway-prevents-gas-leak-around-a-tracheal-tube
#21
JOURNAL ARTICLE
Hideyuki Miyazaki, Takashi Asai, Tomoko Kambara, Atsushi Nagata, Koh Shingu
A 59-year-old man with cervical spondylosis was scheduled for a posterior spine surgery. After induction of anaesthesia with propofol and fentanyl, and neuromuscular blockade with vecuronium, the trachea was intubated using an 8.0-mm ID refinforced tube, without difficulty. After inflation of the cuff with 6 ml of air, there was no gas leak around the tube. The patient was placed in the prone position, and the head fixed to the operating table, using head pins. Several minutes later, there was a marked gas leak around the tracheal tube cuff...
February 2009: Masui. the Japanese Journal of Anesthesiology
https://read.qxmd.com/read/19194153/prospective-clinical-and-fiberoptic-evaluation-of-the-supreme-laryngeal-mask-airway
#22
JOURNAL ARTICLE
Arnd Timmermann, Stefan Cremer, Christoph Eich, Stephan Kazmaier, Anselm Bräuer, Bernhard M Graf, Sebastian G Russo
BACKGROUND: In March 2007, a new disposable laryngeal mask airway (LMA) became available. The LMA Supreme (The Laryngeal Mask Company Limited, St. Helier, Jersey, Channel Islands) aims to combine the LMA Fastrach feature of easy insertion with the gastric access and high oropharyngeal leak pressures of the LMA ProSeal. METHODS: The authors performed an evaluative study with the LMA Supreme, size 4, on 100 women to measure the ease of insertion, determinate the laryngeal fit by fiberoptic classification, evaluate the oropharyngeal leak pressure, and report adverse events...
February 2009: Anesthesiology
https://read.qxmd.com/read/18647269/lower-cuff-pressures-improve-the-seal-of-pediatric-laryngeal-mask-airways
#23
JOURNAL ARTICLE
Ana Licina, Neil A Chambers, Bruce Hullett, Thomas O Erb, Britta S von Ungern-Sternberg
BACKGROUND: Hyperinflation of laryngeal mask airway (LMA) cuffs may be harmful because of the exertion of high pressures on pharyngeal and laryngeal structures. Although cuff manometers may be used to monitor cuff pressure, their use is not routine in many institutions and clinical endpoints are used instead. Furthermore, it is common clinical practice to add air to the cuff in the presence of an air leak to obtain a better seal. METHODS: In a prospective audit, the authors assessed air leakage around pediatric sized LMAs (n = 200) following inflation guided by common clinical endpoints (slight outward movement of the LMA) and then following adjustment of the cuff pressure to the recommended pressure range (<60 cmH(2)O) according to institutional guidelines with the use of a calibrated cuff manometer, directly after induction of anesthesia...
October 2008: Paediatric Anaesthesia
https://read.qxmd.com/read/18462912/choosing-the-correct-laryngeal-mask-airway-sizes-and-cuff-inflation-volumes-in-pediatric-patients
#24
JOURNAL ARTICLE
Anthony M-H Ho, Manoj K Karmakar, Peter W Dion
The laryngeal mask airway (LMA) is now standard airway management equipment in prehospital and Emergency Department (ED) care. Most providers may not be able to match the pediatric LMA sizes to the appropriate weights of pediatric patients. The exact inflation volumes are also difficult to memorize. To overcome this problem, we propose the following equations: Weight (kg) of patient = 2(2 x LMA), where LMA is the size; cuff inflation volume (mL) = 5 x LMA.
October 2008: Journal of Emergency Medicine
https://read.qxmd.com/read/17351218/endotracheal-tube-and-laryngeal-mask-airway-cuff-volume-changes-with-altitude-a-rule-of-thumb-for-aeromedical-transport
#25
JOURNAL ARTICLE
Catherine Mann, Neil Parkinson, Anthony Bleetman
BACKGROUND: Helicopters and light (unpressurised) aircraft are used increasingly for the transport of ventilated patients. Most of these patients are ventilated through endotracheal tubes (ETTs), others through laryngeal mask airways (LMAs). The cuffs of both ETTs and LMAs inflate with increases in altitude as barometric pressure decreases (30 mbar/1000 feet). Tracheal mucosa perfusion becomes compromised at a pressure of approximately 30 cm H2O; critical perfusion pressure is 50 cm H2O...
March 2007: Emergency Medicine Journal: EMJ
https://read.qxmd.com/read/16649463/mechanical-airway-obstruction-from-the-laryngeal-mask-airway-cuff
#26
JOURNAL ARTICLE
V A Ofoegbu, C N Mato
BACKGROUND: The laryngeal mask airway (LMA) classic has been found useful in airway management of both routine and emergency unexpected failed intubations. We report a case of mechanical airway obstruction from anterior in folding of the laryngeal mask airway classical cuff. METHOD: The anaesthetic record of a 55-year-old 70 kg female patient fora left sided total hip replacement that had a failed spinal and was augmented with the laryngeal mask airway. RESULT: Near complete airway obstruction developed after the size 4 laryngeal mask airway classic was inserted and the cuff inflated with 30 ml of air...
January 2006: Nigerian Journal of Medicine: Journal of the National Association of Resident Doctors of Nigeria
https://read.qxmd.com/read/16428533/the-size-1-1-2-proseal-laryngeal-mask-airway-in-infants-a-randomized-crossover-investigation-with-the-classic-laryngeal-mask-airway
#27
RANDOMIZED CONTROLLED TRIAL
Kai Goldmann, Christine Roettger, Hinnerk Wulf
Many problems with the Classic laryngeal mask airway (CLMA) in infants are believed to be related to its inadequate cuff design. One of the main limitations of the CLMA is that the resulting low-pressure seal can be inadequate for positive pressure ventilation (PPV). The ProSeal LMA (PLMA), a new laryngeal mask airway with a modified cuff, has been shown to form a more effective seal than the CLMA in children. The first infant size PLMA, size 1(1/2), became available recently. We studied 30 anesthetized, nonparalyzed infants aged 15 mo (2-30 mo) and weighing 9 kg (5-12 kg)...
February 2006: Anesthesia and Analgesia
https://read.qxmd.com/read/16409525/cuff-filling-volumes-and-pressures-in-pediatric-laryngeal-mask-airways
#28
JOURNAL ARTICLE
Paulo Maino, Alexander Dullenkopf, Christian Keller, Vera Bernet-Buettiker, Markus Weiss
BACKGROUND: Hyperinflation of LMA cuffs carries the risk of airway morbidity by exerting pressure on laryngeal and pharyngeal structures. Cuff hyperinflation in LMAs can result from nitrous oxide diffusion into the LMA cuff and from deliberate manual cuff inflation. METHODS: In an in vitro set up, maximum recommended cuff filling volumes for size 1, 1.5, 2, 2.5, 3 disposable LMAs from different manufacturers [SoftSeal LMA (Portex); Unique LMA (Intavent); Marshall LAD, LaryngoSeal (Tyco)] and reusable Classic and ProSeal LMAs (Intavent) were inflated into completely emptied LMA-cuffs and into LMA-cuffs at resting volume...
January 2006: Paediatric Anaesthesia
https://read.qxmd.com/read/16006489/lingual-nerve-injury-associated-with-the-proseal-laryngeal-mask-airway-a-case-report-and-review-of-the-literature
#29
REVIEW
J Brimacombe, G Clarke, C Keller
We present a case of lingual nerve injury that was associated with use of the ProSeal laryngeal mask airway during shoulder replacement in a 61-yr-old male. We also review other cases of cranial nerve injury, most of which were associated with use of the classic laryngeal mask airway. In principle, the frequency of cranial nerve injuries can be reduced by avoiding insertion trauma, using appropriate sizes, minimizing cuff volume, and early identification and correction of malposition.
September 2005: British Journal of Anaesthesia
https://read.qxmd.com/read/15960408/the-proseal-laryngeal-mask-airway-size-selection-in-male-and-female-patients-in-an-asian-population
#30
RANDOMIZED CONTROLLED TRIAL
S M Tan, Y Y Sim, C K Koay
The aim of this study was to investigate if size 5 compared with size 4 ProSeal laryngeal mask airway (PLMA) in Asian men and size 4 compared with size 3 ProSeal laryngeal mask airway (PLMA) in Asian women, would give a better glottic seal. We conducted a randomized crossover study involving 30 male and 30 female patients of Asian origin. Size 4 and size 5 PLMA were studied in men and size 3 and size 4 PLMA were studied in women. The patients were anaesthetized and paralysed and the PLMA was inserted with the introducer...
April 2005: Anaesthesia and Intensive Care
https://read.qxmd.com/read/15777310/unilateral-recurrent-laryngeal-nerve-neuropraxia-following-placement-of-a-proseal-laryngeal-mask-airway-in-a-patient-with-crest-syndrome
#31
JOURNAL ARTICLE
Y Kawauchi, K Nakazawa, S Ishibashi, Y Kaneko, S Ishikawa, K Makita
We report a severe unilateral recurrent laryngeal nerve neuropraxia following use of the ProSeal laryngeal mask airway (PLMA) in a 71-year-old female patient with CREST syndrome. She required amputation of the 5th phalanx of foot because of gangrene due to Raynaud's syndrome. Anesthesia was induced with propofol, and a size 3 PLMA was inserted. Anesthesia was maintained with sevoflurane and nitrous oxide for 2 h and the operation was performed uneventfully. On removal of PLMA, the cuff volume was measured to 40 ml...
April 2005: Acta Anaesthesiologica Scandinavica
https://read.qxmd.com/read/15725321/the-proseal-laryngeal-mask-airway-in-children
#32
JOURNAL ARTICLE
M Lopez-Gil, J Brimacombe
BACKGROUND: The ProSeal (PLMA) is a new laryngeal mask device with a modified cuff to improve the seal and a drain tube to provide access to the gastrointestinal tract. We assessed the performance of the size 2 (which has no dorsal cuff) and size 3 (which has a dorsal cuff) in terms of insertion success, efficacy of seal, tidal volume, gas exchange, fiberoptic position, gastric tube placement and frequency of problems. METHODS: Eighty children undergoing minor surgery were studied (n = 40, size 2 PLMA, weight 10-25 kg; n = 40, size 3 PLMA, weight >25-50 kg)...
March 2005: Paediatric Anaesthesia
https://read.qxmd.com/read/15673899/the-proseal-has-a-shorter-life-span-than-the-classic-laryngeal-mask-airway
#33
COMPARATIVE STUDY
Sarah Doneley, Joseph Brimacombe, Christian Keller, Achim von Goedecke
We tested the hypothesis that the life-span of the ProSeal laryngeal mask airway (LMA) is shorter than the Classic LMA. We also compared residual cuff volumes and changes in elastance and permeability with use. Six new size 4 ProSeal LMAs and 6 new size 4 Classic LMAs were tested. Each LMA underwent a simulated clinical use cycle until it failed the pre-use check tests. The simulated clinical use cycle comprised: i) inflating the cuff to the maximum recommended volume for 1 h; ii) immersion in an enzymatic solution for 3 min; iii) washing the external and internal surfaces; iv) automatic washing for 14 min (< or =85 degrees C); v) drying for 30 min (< or =75 degrees C); and vi) autoclaving at 134 degrees C for 4 min at 206 kPa...
February 2005: Anesthesia and Analgesia
https://read.qxmd.com/read/15470175/in-cadavers-directly-measured-mucosal-pressures-are-similar-for-the-unique-and-the-soft-seal-laryngeal-mask-airway-devices
#34
COMPARATIVE STUDY
Christian Keller, Joseph Brimacombe, Bernhard Moriggl, Philipp Lirk, Achim von Goedecke
PURPOSE: We compare the Soft Seal and Unique single-use, plastic laryngeal mask airway devices with respect to intracuff pressure, directly measured mucosal pressure and in vitro elastance. METHODS: Ten fresh male cadavers were studied. Microchip pressure sensors were attached to the following locations: A) the anterior middle part of the cuff side; B) the posterior tip of the cuff; C) the anterior base of the cuff; D) the posterior middle part of the cuff side; E) the backplate; and F) the posterior tube...
October 2004: Canadian Journal of Anaesthesia
https://read.qxmd.com/read/15290411/a-comparison-of-postoperative-sore-throat-after-use-of-laryngeal-mask-airway-and-tracheal-tube
#35
RANDOMIZED CONTROLLED TRIAL
Etsuko Mizutamari, Toshiyuki Yano, Kazuo Ushijima, Asuka Ito, Sakiko Anraku, Hironari Tanimoto, Hidenori Terasaki
PURPOSE: We compared the degree of postoperative sore throat (PST) after use of a laryngeal mask airway (LMA; by two insertion techniques) and a tracheal tube (TT) in adult patients. METHODS: Eighty-six adult patients undergoing surgery of an extremity were randomized into three groups. The LMAs (size 4 for men, 3 for women) and TTs were lubricated with 2% lidocaine gel. After the induction of anesthesia, an LMA with the cuff deflated was inserted and then the cuff was inflated in group A, an LMA with the cuff inflated was inserted in group B, and the trachea was intubated using vecuronium in group C; staff anesthesiologists performed all these methods...
2004: Journal of Anesthesia
https://read.qxmd.com/read/15167948/-laryngeal-tube-versus-laryngeal-mask-airway-in-anaesthetised-non-paralysed-patientsa-comparison-of-handling-and-postoperative-morbidity
#36
RANDOMIZED CONTROLLED TRIAL
M Wrobel, U Grundmann, W Wilhelm, S Wagner, R Larsen
BACKGROUND: The purpose of this study was to compare the classical laryngeal mask airway (LMA) with the laryngeal tube (LT) in anaesthetised non-paralysed patients. PATIENTS AND METHODS: A total of 100 patients scheduled for minor elective surgery were included. After standardised induction and maintenance of anaesthesia with propofol and remifentanil, patients were randomly allocated to receive either a LMA or LT; muscle relaxants were not applied. Selection of the appropriate size and the initial inflation volume were chosen according to the manufacturers instructions...
August 2004: Der Anaesthesist
https://read.qxmd.com/read/12557121/-comparison-of-different-laryngeal-mask-airways-in-a-resuscitation-model
#37
COMPARATIVE STUDY
H Genzwürker, A Hundt, T Finteis, K Ellinger
OBJECTIVE: The standard laryngeal mask airway LMA-Classic is recommended in the ILCOR guidelines as alternative to facemask and tracheal tube during cardiopulmonary resuscitation. LMA-Unique, LMA-Fastrach and LMA-ProSeal are additional variants that are compared with the standard LMA in a resuscitation model. METHODS: Tidal volumes, chest compressions and signs of gastric inflation are measured in a standardized resuscitation model (Ambu Cardiac Care Trainer with notebook and thumper)...
February 2003: Anästhesiologie, Intensivmedizin, Notfallmedizin, Schmerztherapie: AINS
https://read.qxmd.com/read/12553391/stability-of-the-lma-proseal-and-standard-laryngeal-mask-airway-in-different-head-and-neck-positions-a-randomized-crossover-study
#38
RANDOMIZED CONTROLLED TRIAL
J Brimacombe, C Keller
BACKGROUND AND OBJECTIVE: The LMA-ProSeal laryngeal mask airway is a new laryngeal mask airway with a modified cuff and drainage tube. We compared oropharyngeal leak pressure, intracuff pressure and anatomical position (assessed fibreoptically) for the Size 5 LMA-ProSeal laryngeal mask airway and the classic laryngeal mask airway in different head-neck positions and using different intracuff inflation volumes. METHODS: Thirty paralysed anaesthetized adult male patients were studied...
January 2003: European Journal of Anaesthesiology
https://read.qxmd.com/read/12500516/appropriate-size-of-laryngeal-mask-airway-for-children
#39
COMPARATIVE STUDY
G P Y Loke, S M Tan, A S B Ng
The aim of this crossover study was to determine the optimal size of laryngeal mask airway in children weighing 10 to 20 kg. In each of 67 apnoeic anaesthetized children, the size 2 and size 2 1/2 laryngeal mask airways were inserted consecutively by a skilled user and the cuff inflated to 60 cmH2O. Each LMA was assessed for the ease of insertion (by the number of attempts), oropharyngeal leak pressure, anatomical position (assessed fibreoptically) and the volume of air required to achieve intracuff pressure of 60 cmH2O...
December 2002: Anaesthesia and Intensive Care
https://read.qxmd.com/read/11339788/the-laryngeal-mask-airway-in-infants-and-children
#40
JOURNAL ARTICLE
C Park, J H Bahk, W S Ahn, S H Do, K H Lee
PURPOSE: To compare the effectiveness of various laryngeal mask airway (LMA) sizes and their performance during positive pressure ventilation (PPV) in paralyzed pediatric patients. METHODS: Pediatric patients (n = 158), < 30 kg, ASA 1 or 2 were studied. After paralysis, an LMA of the recommended size was inserted and connected to a volume ventilator. Fibreoptic bronchoscopy (FOB) was performed and graded: 1, larynx only seen; 2, larynx and epiglottis posterior surface seen; 3, larynx, and epiglottis tip or anterior surface seen--visual obstruction of epiglottis to larynx: < 50%; 4, epiglottis down-folded, and its anterior surface seen--visual obstruction of epiglottis to larynx: > 50%; 5, epiglottis down-folded and larynx not seen directly...
April 2001: Canadian Journal of Anaesthesia
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