Influence of operating table height on laryngeal view during direct laryngoscopy: A randomized prospective crossover trial

Kriti Puri, Sandesh Udupi, Kailasnath Shenoy, Anitha Shenoy

Research output: Contribution to journalArticle

Abstract

Background: Operating table height/patient level in relation to anaesthesiologist influences mask ventilation, laryngoscopy, intubation and task performance in terms of physical and mental workload. The same was evaluated in this study. Methods: Twenty five specialist anaesthesiologists performed mask ventilation and laryngoscopy thrice and intubation once on six patients each, [n = 150] at three different operating table levels (Level X: patient at level of xiphisternum of anaesthesiologist, level A: 5 cms above; level B: 5 cms below xiphisternum). Primary variable was quality of laryngoscopic view obtained. Secondary variables were anaesthesiologist's comfort, ease of performing these tasks and movements at various joints in anaesthesiologist assessed in subjective and objective ways. Results: Laryngoscopic view was best at levels X and A when compared to B (p = 0.0004). Mask ventilation was most comfortable at level B and least at level A (p < 0.01). At level B, there was maximum discomfort in 76.6% during laryngoscopy and 60% during intubation (p < 0.001). Level A had the fastest time (mean ± SD) for both laryngoscopy (8.30s) and intubation (18.3s) (p < 0.01). Total joint movements were maximal at level B (p < 0.001). Conclusion: Higher operating table levels are ideal for laryngoscopy and intubation whereas lower levels favour mask ventilation.

Original languageEnglish
Pages (from-to)14-18
Number of pages5
JournalTrends in Anaesthesia and Critical Care
Volume28
DOIs
Publication statusPublished - 01-10-2019
Externally publishedYes

Fingerprint

Operating Tables
Laryngoscopy
Intubation
Cross-Over Studies
Masks
Joints
Task Performance and Analysis
Workload

All Science Journal Classification (ASJC) codes

  • Critical Care and Intensive Care Medicine
  • Anesthesiology and Pain Medicine

Cite this

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title = "Influence of operating table height on laryngeal view during direct laryngoscopy: A randomized prospective crossover trial",
abstract = "Background: Operating table height/patient level in relation to anaesthesiologist influences mask ventilation, laryngoscopy, intubation and task performance in terms of physical and mental workload. The same was evaluated in this study. Methods: Twenty five specialist anaesthesiologists performed mask ventilation and laryngoscopy thrice and intubation once on six patients each, [n = 150] at three different operating table levels (Level X: patient at level of xiphisternum of anaesthesiologist, level A: 5 cms above; level B: 5 cms below xiphisternum). Primary variable was quality of laryngoscopic view obtained. Secondary variables were anaesthesiologist's comfort, ease of performing these tasks and movements at various joints in anaesthesiologist assessed in subjective and objective ways. Results: Laryngoscopic view was best at levels X and A when compared to B (p = 0.0004). Mask ventilation was most comfortable at level B and least at level A (p < 0.01). At level B, there was maximum discomfort in 76.6{\%} during laryngoscopy and 60{\%} during intubation (p < 0.001). Level A had the fastest time (mean ± SD) for both laryngoscopy (8.30s) and intubation (18.3s) (p < 0.01). Total joint movements were maximal at level B (p < 0.001). Conclusion: Higher operating table levels are ideal for laryngoscopy and intubation whereas lower levels favour mask ventilation.",
author = "Kriti Puri and Sandesh Udupi and Kailasnath Shenoy and Anitha Shenoy",
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Influence of operating table height on laryngeal view during direct laryngoscopy : A randomized prospective crossover trial. / Puri, Kriti; Udupi, Sandesh; Shenoy, Kailasnath; Shenoy, Anitha.

In: Trends in Anaesthesia and Critical Care, Vol. 28, 01.10.2019, p. 14-18.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Influence of operating table height on laryngeal view during direct laryngoscopy

T2 - A randomized prospective crossover trial

AU - Puri, Kriti

AU - Udupi, Sandesh

AU - Shenoy, Kailasnath

AU - Shenoy, Anitha

PY - 2019/10/1

Y1 - 2019/10/1

N2 - Background: Operating table height/patient level in relation to anaesthesiologist influences mask ventilation, laryngoscopy, intubation and task performance in terms of physical and mental workload. The same was evaluated in this study. Methods: Twenty five specialist anaesthesiologists performed mask ventilation and laryngoscopy thrice and intubation once on six patients each, [n = 150] at three different operating table levels (Level X: patient at level of xiphisternum of anaesthesiologist, level A: 5 cms above; level B: 5 cms below xiphisternum). Primary variable was quality of laryngoscopic view obtained. Secondary variables were anaesthesiologist's comfort, ease of performing these tasks and movements at various joints in anaesthesiologist assessed in subjective and objective ways. Results: Laryngoscopic view was best at levels X and A when compared to B (p = 0.0004). Mask ventilation was most comfortable at level B and least at level A (p < 0.01). At level B, there was maximum discomfort in 76.6% during laryngoscopy and 60% during intubation (p < 0.001). Level A had the fastest time (mean ± SD) for both laryngoscopy (8.30s) and intubation (18.3s) (p < 0.01). Total joint movements were maximal at level B (p < 0.001). Conclusion: Higher operating table levels are ideal for laryngoscopy and intubation whereas lower levels favour mask ventilation.

AB - Background: Operating table height/patient level in relation to anaesthesiologist influences mask ventilation, laryngoscopy, intubation and task performance in terms of physical and mental workload. The same was evaluated in this study. Methods: Twenty five specialist anaesthesiologists performed mask ventilation and laryngoscopy thrice and intubation once on six patients each, [n = 150] at three different operating table levels (Level X: patient at level of xiphisternum of anaesthesiologist, level A: 5 cms above; level B: 5 cms below xiphisternum). Primary variable was quality of laryngoscopic view obtained. Secondary variables were anaesthesiologist's comfort, ease of performing these tasks and movements at various joints in anaesthesiologist assessed in subjective and objective ways. Results: Laryngoscopic view was best at levels X and A when compared to B (p = 0.0004). Mask ventilation was most comfortable at level B and least at level A (p < 0.01). At level B, there was maximum discomfort in 76.6% during laryngoscopy and 60% during intubation (p < 0.001). Level A had the fastest time (mean ± SD) for both laryngoscopy (8.30s) and intubation (18.3s) (p < 0.01). Total joint movements were maximal at level B (p < 0.001). Conclusion: Higher operating table levels are ideal for laryngoscopy and intubation whereas lower levels favour mask ventilation.

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