Selection of the Proper Size of Laryngeal Mask Airway in Adults

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.

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

Anaesthesia ◽

10.1046/j.1365-2044.1998.00403.x ◽

1998 ◽

Vol 53 (6) ◽

pp. 565-570 ◽

Cited By ~ 92

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

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Randomized Comparison of Actual and Ideal Body Weight for Size Selection of the Laryngeal Mask Airway Classic in Overweight Patients

Journal of Korean Medical Science ◽

10.3346/jkms.2015.30.8.1197 ◽

2015 ◽

Vol 30 (8) ◽

pp. 1197 ◽

Cited By ~ 3

Author(s):

Min-Soo Kim ◽

Jong Seok Lee ◽

Sang Beom Nam ◽

Hyo Jong Kang ◽

Ji Eun Kim

Keyword(s):

Body Weight ◽

Laryngeal Mask Airway ◽

Ideal Body Weight ◽

Laryngeal Mask ◽

Size Selection ◽

Ideal Body ◽

Selection Of

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

10.21203/rs.3.rs-152376/v1 ◽

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.

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