scholarly journals Influence of cuff volume on oropharyngeal leak pressure and fibreoptic position with the laryngeal mask airway

1998 ◽  
Vol 81 (2) ◽  
pp. 186-187 ◽  
Author(s):  
C Keller ◽  
F Pühringer ◽  
J R Brimacombe
Keyword(s):  
Laryngeal Mask Airway ◽  
Laryngeal Mask ◽  
Leak Pressure ◽  
Cuff Volume ◽  
Oropharyngeal Leak Pressure

scholarly journals Prospective Clinical and Fiberoptic Evaluation of the Supreme Laryngeal Mask Airway ™

2009 ◽  
Vol 110 (2) ◽  
pp. 262-265 ◽  
Author(s):  
Arnd Timmermann ◽  
Stefan Cremer ◽  
Christoph Eich ◽  
Stephan Kazmaier ◽  
Anselm Bräuer ◽  
...  
Keyword(s):  
Laryngeal Mask Airway ◽  
Cuff Pressure ◽  
Laryngeal Mask ◽  
Leak Pressure ◽  
Cuff Volume ◽  
Oropharyngeal Leak Pressure ◽  
Company Limited ◽  
Patient Reported ◽  
The Mean ◽  
Lma Supreme

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. Results Insertion of the LMA Supreme was possible in 94 patients (94%) during the first attempt, and in 5 patients (5%) during the second attempt. In one small patient, the LMA Supreme could not be inserted because of limited pharyngeal space. This patient was excluded from further analysis. Insertion of a gastric tube was possible in all patients at the first attempt. The median time for LMA Supreme insertion was 10.0 s (+/-4.7 s; range, 8-30 s). Laryngeal fit, evaluated by fiberscopic view, was rated as optimal in all patients, both immediately after insertion of the LMA Supreme and at the end of surgery. After equalization to room pressure, the mean cuff volume needed to achieve 60 cm H2O cuff pressure was 18.4 ml (+/-3.8 ml; range, 8-31 ml). The mean oropharyngeal leak pressure at the level of 60 cm H2O cuff pressure was 28.1 cm H2O (+/-3.8 cm H2O, range, 21-35 cm H2O). Eight patients (8.1%) complained of a mild sore throat. No patient reported dysphagia or dysphonia. Conclusions Clinical evaluation of the LMA Supreme showed easy insertion, optimal laryngeal fit, and low airway morbidity. Oropharyngeal leak pressure results were comparable to earlier data from the LMA ProSeal.

scholarly journals Gum-elastic Bougie-guided Insertion of the ProSeal™ Laryngeal Mask Airway: A New Technique

2002 ◽  
Vol 30 (5) ◽  
pp. 624-627 ◽  
Author(s):  
A. Howath ◽  
J. Brimacombe ◽  
C. Keller
Keyword(s):  
Laryngeal Mask Airway ◽  
Gastric Tube ◽  
Cardiovascular Responses ◽  
Laryngeal Mask ◽  
Drainage Tube ◽  
Leak Pressure ◽  
Success Rates ◽  
Tube Insertion ◽  
Oropharyngeal Leak Pressure ◽  
Low Incidence

We determined the success rates, cardiovascular responses and airway morbidity for gum-elastic bougie-guided insertion of the ProSeal™ laryngeal mask airway. One hundred anaesthetized, non-paralyzed adults (ASA 1–2, aged 18 to 80 years) were studied. The ProSeal LMA drainage tube was primed with a well-lubricated 16 French gauge gum-elastic bougie with the curved end proximal and the straight end protruding 30 cm beyond the drainage tube tip. The straight end of the gum-elastic bougie was inserted into the oesophagus under laryngoscopic guidance, the laryngoscope removed and the ProSeal LMA inserted using the standard insertion technique and the gum-elastic bougie as a guide. The following variables were recorded: ease of insertion, oropharyngeal leak pressure, ventilatory capability, ease of gastric tube insertion, blood staining on the bougie or LMA at removal, and postoperative airway morbidity. Haemodynamic data were recorded immediately pre-insertion and every minute for five minutes after insertion. Gum-elastic bougie and ProSeal LMA insertion was successful at the first attempt in all patients within 50 seconds. There were no significant increases in heart rate or blood pressure. Oropharyngeal leak pressure was 33 (17–40) cmH 2 O and ventilation was possible without leak in all patients at 9.5 ml.kg –1 tidal volume. There were no drainage tube or gastric air leaks. Gastric tube insertion was successful at the first attempt in all patients. Blood staining at removal was not detected on the gum-elastic bougie, but was detected in 3% of ProSeal LMAs. The incidence of sore throat, dysphagia and dysarthria was 21%, 9% and 1% respectively. We conclude that gum-elastic bougie-guided insertion of the ProSeal LMA has a high success rate and is associated with minimal haemodynamic change and a low incidence of trauma.

A Randomized Crossover Comparison of Airway Sealing with the Laryngeal Mask Airway Ambu AuraFlex at Three Intracuff Pressures in Pediatric Laparoscopic Surgery

2019 ◽  
Author(s):  
Xiang Liu ◽  
Xiaona Tan ◽  
Qi Zhang ◽  
Li Qiao ◽  
Lei Shi
Keyword(s):  
Laparoscopic Surgery ◽  
Laryngeal Mask Airway ◽  
Airway Pressure ◽  
Laryngeal Mask ◽  
Peak Airway Pressure ◽  
Supraglottic Airway ◽  
Intracuff Pressure ◽  
Leak Pressure ◽  
Oropharyngeal Leak Pressure ◽  
Mucosal Change

Abstract Objective An adequate intracuff pressure is important to ensure sufficient sealing function when using supraglottic airway devices to protect the airway from secretions and achieve adequate positive pressure ventilation. The aim of this study is to analyze a feasible and effective alternative Ambu AuraFlex intracuff pressure in child's laparoscopic surgery. Study Design Seventy-two children were included in this study. After insertion of the laryngeal mask airway AuraFlex, oropharyngeal leak pressure (OLP) was measured at intracuff pressures of 10, 30, and 60-cmH2O according to one of six sequences produced on the basis of 3 × 6 Williams crossover design. During the intraoperative period, AuraFlex was maintained using the last intracuff pressure of the allocated sequence. Oropharyngeal leak pressure, peak airway pressure, the fiberoptic view, mucosal change, and complications were assessed at three intracuff pressures. Results The OLP at the intracuff pressure of 10 cmH2O was significantly lower than that of 30 cmH2O (2# 18.1 ± 1.5 vs. 19.5 ± 1.4 cmH2O, p = 0.001; 2.5# 17.7 ± 1.2 vs. 20.2 ± 1.4, p = 0.001) and 60 cmH2O (2# 18.1 ± 1.5 vs. 20.0 ± 1.3 cmH2O, p = 0.002; 2.5# 17.7 ± 1.2 vs. 20.8 ± 1.1, p = 0.003). Compared with the peak airway pressure in pre-and postpneumoperitoneum, the OLP was significantly higher. Subgroup analysis showed no differences in mucosal change and complications. Conclusion Intracuff pressures of 30 may be sufficient for the Ambu AuraFlex in child's laparoscopic surgery, and there may be no added benefit of an intracuff pressure of 60 cmH2O, as oropharyngeal leak pressures were similar.

scholarly journals The ProSeal™ Laryngeal Mask Airway Size Selection in Male and Female Patients in an Asian Population

2005 ◽  
Vol 33 (2) ◽  
pp. 239-242 ◽  
Author(s):  
S. M. Tan ◽  
Y. Y. Sim ◽  
C. K. Koay
Keyword(s):  
Laryngeal Mask Airway ◽  
Mucosal Injury ◽  
Laryngeal Mask ◽  
Asian Women ◽  
Intracuff Pressure ◽  
Leak Pressure ◽  
Female Patients ◽  
Anatomical Position ◽  
Oropharyngeal Leak Pressure ◽  
Asian Men

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. The oropharyngeal leak pressure (OLP), ease of insertion, anatomical position, mucosal injury, visibility of cuff in the mouth and volume of air required to achieve an intracuff pressure of 60 cmH2O were studied. In male patients, oropharyngeal leak pressure was higher when size 5 PLMA was used (P<0.001) and there was a higher incidence of mucosal injury (P=0.025). For female patients, oropharyngeal leak pressure was higher with size 4 PLMA (P=0.036) while the number of insertion attempts, anatomical position and mucosal injury were similar. The cuff was not visible in the oral cavity in any cases. The mean volume of air required to achieve an intracuff pressure of 60 cmH2O was less than the maximum recommended by the manufacturers. The size 5 PLMA in Asian men and size 4 PLMA in Asian women resulted in a more effective glottic seal. The use of size 5 PLMA in Asian men led to increased mucosal injury.

scholarly journals Appropriate Size of Laryngeal Mask Airway for Children

2002 ◽  
Vol 30 (6) ◽  
pp. 771-774 ◽  
Author(s):  
G. P. Y. Loke ◽  
S. M. Tan ◽  
A. S. B. Ng
Keyword(s):  
Laryngeal Mask Airway ◽  
Crossover Study ◽  
Airway Pressure ◽  
Fibreoptic Bronchoscope ◽  
Laryngeal Mask ◽  
Intracuff Pressure ◽  
Optimal Size ◽  
Leak Pressure ◽  
Gastric Insufflation ◽  
Oropharyngeal Leak Pressure

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 2½ laryngeal mask airways were inserted consecutively by a skilled user and the cuff inflated to 60 cmH 2 O. 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 cmH 2 O. During the measurement of oropharyngeal leak pressure, the airway pressure was not allowed to exceed 30 cmH 2 O. There was no failed attempt at insertion with any size. The oropharyngeal leak pressure was significantly less for the size 2 LMA compared to the size 2½ LMA (P<0.001). The oesophagus was visible on three occasions, all with the size 2 LMA. Gastric insufflation occurred in three patients, all with the size 2 LMA. The incidence of low oropharyngeal leak pressure (<10 cmH 2 O) was low (9.0%) and all occurred with the size 2 LMA. The fibreoptic bronchoscope scores were not significantly different between the two sizes of LMAs. The volume of air to achieve intracuff pressure of 60 cmH 2 O was much lower than the maximum recommended volume (5.1 ml for size 2 and 6.2 ml for size 2½ ). We conclude that the size 2½ LMA provides a better fit than size 2 in children 10 to 20 kg.

Sign in / Sign up

Export Citation Format

Share Document