Influence of head and neck positions on oropharyngeal seal pressure with Baska mask® versus I-gel™; A randomised clinical study

Baska Mask is non-inferior to tracheal tube in preventing airway contamination during controlled ventilation in elective nasal surgeries: A randomised controlled trial

Background and Aims:

Baska Mask, a newly designed third-generation supraglottic device, has a sump where the pharyngeal secretions can collect and be suctioned out continuously. We aimed to study the effectiveness of Baska Mask in preventing airway contamination during nasal surgeries. Our primary objective was to assess airway soiling using fibreoptic bronchoscopy. Total airway manipulation time, haemodynamic parameters during device insertion and post-operative oro-pharyngeal morbidities were the secondary objectives.

Methods:

Eighty-four participants undergoing nasal surgeries were randomised to either have their airway maintained with Baska Mask (Group-BM) or Endotracheal tube (Group-TT). Fibreoptic bronchoscopy was performed at the end of the surgery and the airway was inspected for signs of contamination. Total airway manipulation time, haemodynamic parameters during device insertion and post-operative oro-pharyngeal morbidities were also assessed. Unpaired Student's t test was used for parametric data and Chi-square test for nonparametric data. One-way analysis of variance (ANOVA) was used for the intra-group analysis of haemodynamic data.

Results:

Tracheal contamination was not observed in any patient in either group. Time taken for device insertion (Group TT: 24.24 ± 6.86 s vs. Group BM: 24.22 ± 7.3 s; P = 0.97) was similar in both the groups. The total airway manipulation time was 2 min longer in Group-TT (P = 0.000) due to additional time taken for insertion of throat pack. Haemodynamic parameters during device insertion were stable and post-operative oro-pharyngeal morbidities were fewer with Baska Mask when compared to Tracheal tube.

Conclusions:

Baska Mask is non-inferior to tracheal tube in preventing tracheal contamination in patients undergoing nasal surgeries.

Comparative evaluation of Air-Q blocker and Proseal laryngeal mask airway in patients undergoing elective surgery under general anaesthesia: A randomised controlled trial

Background and Aims:

The Air-Q blocker (Cook gas LLC, Mercury Medical, Clearwater, FL, USA) is a relatively new supraglottic airway device (SAD) with capability to serve as a conduit for intubation. As there is limited data on Air-Q blocker, the present study was performed to compare the efficacy of Air-Q blocker and Proseal laryngeal mask airway (PLMA) in patients undergoing elective surgery.

Methods:

A total of 90 American Society of Anesthesiologists (ASA) physical status I and II patients were randomly allocated to Air-Q blocker or PLMA group. Oropharyngeal leak pressure (OLP), insertion success, insertion time, ease of orogastric tube (OGT) insertion, fibreoptic visualisation of the glottis, haemodynamic and ventilation parameters, and complications at emergence and postoperatively were investigated.

Results:

OLPs were higher in PLMA group as compared to Air-Q blocker group (P = 0.002). Still, the OLP (27.5 ± 5.8 cm H₂O) was clinically effective in Air-Q blocker group. The mean time for successful insertion was significantly shorter for Air-Q blocker than PLMA (P = 0.019). The number of attempts to insert both the devices was comparable (P ≥ 0.05). Air-Q blocker provided a significantly better fibreoptic score than PLMA (P = 0.038). The two groups were comparable in terms of ease of OGT insertion, haemodynamics and ventilation parameters, and complications at emergence and postoperatively.

Conclusions:

Air-Q blocker provides a clinically effective OLP though PLMA provides a slightly better sealing function in patients undergoing laparoscopic and non-laparoscopic surgeries under general anaesthesia requiring neuromuscular blockade. Air-Q blocker has shorter insertion time and a better fibreoptic view of glottis as compared to PLMA.