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ProSeal Laryngeal Mask Airway Placement: A Comparison of Blind versus Direct Laryngoscopic Insertion Techniques.

BACKGROUND AND OBJECTIVES: The laryngeal mask airway (LMA) ProSeal is most commonly used supraglottic airway device; it is routinely inserted by blind technique. Although blind insertion technique is most widely used, there are many techniques which are available such as priming the drain tube with a guiding instrument such as a suction catheter, a gum elastic bougie, a Flexi-Slip Stylet, direct laryngoscopy, and even a fiber-optic bronchoscope (FOB). The present study was undertaken to compare and assess the placement of LMA ProSeal using blind versus direct laryngoscopy techniques using FOB.

MATERIALS AND METHODS: A prospective randomized comparative study of 110 patients divided into two groups of 55 each as Group I (blind insertion) and Group II (direct laryngoscopic insertion) after satisfying the inclusion criteria. The anatomical position was assessed by flexible FOB and evaluated based on fiber-optic scoring system.

RESULTS: In the present study, demographic characteristics, vital parameters, Mallampati score, and Wilson's score were comparable in both the groups ( P > 0.05). The fiber-optic score (FOS) 1 in Group II was 78.18% compared to 60% in Group I, but the difference was statistically not significant ( P > 0.05). Furthermore, the mean FOS in Group II was slightly high (3.84 ± 0.87) compared to Group II (1.62 ± 0.87), but the difference was statistically not significant ( P > 0.05). Further hemodynamic parameters ( P > 0.05) and complications ( P > 0.05) were comparable in both the groups.

CONCLUSION: The LMA placement scoring was similar in both blind and direct laryngoscopic techniques. Blind insertion technique is a simpler, easier, and has stood the test of time.

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