scholarly journals An evaluation of the factors influencing selection of the optimal size of laryngeal mask airway in normal adults

Anaesthesia ◽  
1998 ◽  
Vol 53 (6) ◽  
pp. 565-570 ◽  
Author(s):  
A. M. Berry ◽  
J. R. Brimacombe ◽  
K. F. McManus ◽  
M. Goldblatt
Keyword(s):  
Laryngeal Mask Airway ◽  
Laryngeal Mask ◽  
Optimal Size ◽  
Factors Influencing ◽  
Normal Adults ◽  
Selection Of

scholarly journals Selection of the Proper Size of Laryngeal Mask Airway in Adults

1996 ◽  
Vol 83 (3) ◽  
pp. 664 ◽  
Author(s):  
Joseph R. Brimacombe ◽  
Alison M. Berry ◽  
Robert C. Campbell ◽  
Chandi Verghese
Keyword(s):  
Laryngeal Mask Airway ◽  
Laryngeal Mask ◽  
Proper Size ◽  
Selection Of

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.

Selection of the Proper Size of Laryngeal Mask Airway in Adults

1996 ◽  
Vol 83 (3) ◽  
pp. 664 ◽  
Author(s):  
Joseph R. Brimacombe ◽  
Alison M. Berry ◽  
Robert C. Campbell ◽  
Chandi Verghese
Keyword(s):  
Laryngeal Mask Airway ◽  
Laryngeal Mask ◽  
Proper Size ◽  
Selection Of

scholarly journals Effect of cost awareness on the utilization of laryngeal mask airway among anesthesiology residents

2013 ◽  
Vol 2 (3) ◽  
pp. 113
Author(s):  
Michael Stuart Green ◽  
Sheldon B. Gomes ◽  
Kelly A. Machovec ◽  
Parmis Green
Keyword(s):  
Laryngeal Mask Airway ◽  
Laryngeal Mask ◽  
Significant Difference ◽  
Before And After ◽  
Utilization Patterns ◽  
Survey Results ◽  
Approximate Cost ◽  
Cost Awareness ◽  
Single Blind ◽  
Selection Of

Introduction: Knowledge of cost perception is the primary step towards determining the role cost plays in decision making. We examined perception of cost and utilization. We tried to determine reasons for choosing pieces of equipment and tested the effect of cost awareness. We hypothesized altered utilization patterns in favor of a less expensive product. Methods: We conducted a single blind prospective study examining the perceptions of laryngeal mask airway (LMA) cost among residents. The study tested whether cost awareness would alter utilization. The price was altered without residents’ knowledge to ensure recognition of a price difference. Utilization before and after price labeling was compared. Results: The survey results showed when asked specifically ‘does cost influence your choice of LMA?’ 56% of the residents answered ‘No’. Only 2 out of 23 resident responses to the question ‘how much does an LMA cost’ fell within a 50% range of its approximate cost of $8. When asked ‘if two products are equivalent, would you choose the cheaper one?’ all residents answered ‘Yes’. Prior to price labeling, LMA selection 8.25% GREEN and 91.75% CLEAR. After price labeling, selection of LMA’s was 24.27% GREEN and 75.73% CLEAR LMA’s. There was a significant difference between the utilization of GREEN and CLEAR LMA’s before and after price labeling. Conclusion: This prospective single blind study on how cost awareness effects LMA selection showed altered selection following price labeling towards lower cost products. Focusing on cost awareness may have an impact on the future utilization and health care expenses.

scholarly journals Hyomental distance measured by ultrasound for size selection of laryngeal mask airway in female patients: a randomized controlled study

2021 ◽  
Author(s):  
xia wang ◽  
Zhi-Hang Tang ◽  
wuhua ma
Keyword(s):  
Laryngeal Mask Airway ◽  
Laryngeal Mask ◽  
Randomized Controlled Study ◽  
Controlled Study ◽  
Weight Group ◽  
Female Patients ◽  
Size Selection ◽  
Randomized Controlled ◽  
Classic Laryngeal Mask Airway ◽  
Selection Of

Abstract BackgroundOptimal size selection of classic laryngeal mask airway (LMA) remains a major challenge for anaesthesiologists. Because the body weight, current method to select LMA size, might not inconsistent with dimension of hypopharynx where LMA is positioned. Hyomental distance by ultrasound as an common parameter in upper airway may be considered a predictor of LMA size choice, that we conducted a randomized, controlled study to compare the efficacy of size selection between commonly recommended weight-based method and hyomental distance-based method.MethodsSeventy female patients undergoing breast cancer surgery were enrolled in our study and randomly assigned into either the hyomental distance group or weight group. The primary outcome was the correct rate of selection LMA without need for size adjustment or use of other devices. Secondary outcomes included injury rate, oropharyngeal leak pressure (OLP), and insertion attempts.ResultsTwo participants were excluded from weight group due to tracheal intubation. The correct rate of LMA size-selected were significant difference of 77.14% and 51.51% in hyomental distance group and weight group, respectively(P=0.027). Five (14.29%) and 7 (21.21%) patients were injured in hyomental-distance group and weight group, respectively. Values of OLP in two groups were 22 (19-24) cmH2O and 22 (19.5-24) cmH2O, respectively. The insertion attempts were the same in both groups and no statistical differences were observed regarding these three outcomes. ConclusionThe hyomental distance-based method possessed a higher success rate for LMA-classic size selection than did the weight-based method, with the same excellent OLP value, low possibility of injury, and a low number of insertion attempts as weight-based method. Trial registrationOur study was registered with the Chinese Clinical Trial Registry (ChiCTR1900021123), registered 29 January 2019.

Selection of the Proper Size of Laryngeal Mask Airway in Adults

1996 ◽  
Vol 83 (3) ◽  
pp. 663-664 ◽  
Author(s):  
Gregory S. Voyagis ◽  
Peter G. Batzioulis ◽  
Pelagia N. Secha-Doussaitou
Keyword(s):  
Laryngeal Mask Airway ◽  
Laryngeal Mask ◽  
Proper Size ◽  
Selection Of
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