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Can posture of Anaesthesiologist affect outcomes of laryngoscopy and tracheal intubation?

Dr  Monish  RautWritten by Dr Monish Raut Published On 2024-05-17T09:45:52+05:30  |  Updated On 17 May 2024 9:46 AM IST
Can posture of Anaesthesiologist affect outcomes of laryngoscopy and tracheal intubation?
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Recent study aimed to compare the ergonomic comfort and posture of anaesthesiologists during laryngoscopy and tracheal intubation in the head-elevated laryngoscopy position (HELP) and with a 25° backup. A total of 48 patients with normal airways and 12 experienced anaesthesiologists participated in the study. The anaesthesiologists' posture was assessed by measuring various joint angles, and their subjective comfort was evaluated using a Likert scale. The Cormack-Lehane (CL) grading, haemodynamic stability, tracheal intubation time, and complications were also compared between the two positions.

Comparison of Posture and Comfort

The findings revealed that both positions, supine HELP and 25° backup HELP, demonstrated comparable anaesthesiologist posture and comfort. However, the 25° backup position significantly improved the Cormack-Lehane grades, with 68% of the patients achieving grade 1 compared to 31% in the supine HELP group. Haemodynamic stability and tracheal intubation time showed no significant differences between the groups, and no complications were reported in either group.

Importance of Patient Positioning

The study also highlighted the importance of proper patient positioning for optimal glottic visualisation and improved tracheal intubation success. The head-elevated laryngoscopy position (HELP) and a 25° backup were proposed to enhance glottic visualisation, and the 25° backup HELP was shown to provide better glottic visualisation and improve the Cormack-Lehane grades. The study concluded that anaesthesiologists' posture and comfort during laryngoscopy and tracheal intubation are similar between supine and 25° backup positions in patients with easy airways.

Study Findings and Limitations

Overall, the study found no significant difference in the posture adopted by anaesthesiologists in either position during laryngoscopy and tracheal intubation. However, the 25° backup position significantly improved Cormack-Lehane grades, providing better glottic visualisation. The time to complete intubation was comparable between the groups, with all intubations performed in a single attempt. The study was conducted with a crossover design, standardised the adjustment of the table height, and employed both subjective and objective assessments, but had limitations related to the sample size and patient selection.

Key Points -

- The findings revealed that both positions, supine HELP and 25° backup HELP, demonstrated comparable anaesthesiologist posture and comfort. However, the 25° backup position significantly improved the Cormack-Lehane grades. Haemodynamic stability and tracheal intubation time showed no significant differences between the groups, and no complications were reported in either group.

- The study highlighted the importance of patient positioning for optimal glottic visualisation and improved tracheal intubation success. It suggested that the head-elevated laryngoscopy position (HELP) and a 25° backup could enhance glottic visualisation. The study concluded that anaesthesiologists' posture and comfort during laryngoscopy and tracheal intubation are similar between supine and 25° backup positions in patients with easy airways. The study found no significant difference in the posture adopted by anaesthesiologists in either position during laryngoscopy and tracheal intubation. However, the 25° backup position significantly improved Cormack-Lehane grades, providing better glottic visualisation. The time to complete intubation was comparable between the groups, with all intubations performed in a single attempt. The study was conducted with a crossover design, standardised the adjustment of the table height, and employed both subjective and objective assessments, but had limitations related to the sample size and patient selection.

Reference –

Mookambika R, Kumar RV, Areti A, Jaya V. Comparing the posture and comfort of anaesthesiologists during laryngoscopy and tracheal intubation in the head elevated laryngoscopy position in supine position and with a 25° backup: A randomised clinical crossover trial. Indian J Anaesth 2024;68:547-52

25° Backupergonomicshead elevated laryngoscopy positionintratracheallaryngoscopypatient positioningposturetracheal intubation
Dr  Monish  Raut
Dr Monish Raut

    MBBS, MD (Anaesthesiology), FNB (Cardiac Anaesthesiology)

    Dr Monish Raut is a practicing Cardiac Anesthesiologist. He completed his MBBS at Government Medical College, Nagpur, and pursued his MD in Anesthesiology at BJ Medical College, Pune. Further specializing in Cardiac Anesthesiology, Dr Raut earned his FNB in Cardiac Anesthesiology from Sir Ganga Ram Hospital, Delhi.

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