No radiographic index predicts difficult intubation using the Optiscope™ in cervical spine surgery patients: a retrospective study

Abstract Background The Optiscope™ can be used for intubation with minimal neck motion. We retrospectively investigated radiographic predictors of difficult intubation using the Optiscope™ by analyzing preoperative radiographic images. Methods One hundred eighty-four patients who were intubated with...

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Main Authors: Hyongmin Oh, Hansol Kim, Hyun-Kyu Yoon, Hyung-Chul Lee, Hee-Pyoung Park
Format: Article
Language:English
Published: BMC 2020-02-01
Series:BMC Anesthesiology
Subjects:
Online Access:http://link.springer.com/article/10.1186/s12871-020-00966-3
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author Hyongmin Oh
Hansol Kim
Hyun-Kyu Yoon
Hyung-Chul Lee
Hee-Pyoung Park
author_facet Hyongmin Oh
Hansol Kim
Hyun-Kyu Yoon
Hyung-Chul Lee
Hee-Pyoung Park
author_sort Hyongmin Oh
collection DOAJ
description Abstract Background The Optiscope™ can be used for intubation with minimal neck motion. We retrospectively investigated radiographic predictors of difficult intubation using the Optiscope™ by analyzing preoperative radiographic images. Methods One hundred eighty-four patients who were intubated with the Optiscope™ under manual in-line cervical stabilization for cervical spine surgery were enrolled. Radiographic indices were measured on preoperative cervical spine lateral X-ray and magnetic resonance imaging images. Difficult intubation was defined as failure or time consumption more than 90 s on the first attempt. To identify significant predictors of difficult intubation using the Optiscope™ and evaluate their diagnostic value, multivariable logistic regression and receiver operating characteristic analyses were used. Results Fourty-seven patients showed difficult intubation. There was no significant difference in radiographic indices between the difficult and easy intubation groups, but higher body mass index (BMI) (26.5 [3.0] vs. 24.6 [3.5] kg/m2, P = 0.001), shorter sternomental distance (SMD) (122.0 [104.0 to 150.0] vs. 150.0 [130.0 to 170.0] mm, P = 0.001), shorter interincisor gap (40.0 [35.0 to 45.0] vs. 43.0 [40.0 to 50.0] mm, P = 0.006), and higher incidence of excessive oral secretions (10.6% vs. 2.9%, P = 0.049) were observed in patients with difficult intubation. In multivariable analysis, BMI (odds ratio [95% confidence interval]; 1.15 [1.03 to 1.28], P = 0.011) and SMD (odds ratio [95% confidence interval]; 0.98 [0.97 to 1.00], P = 0.008) were associated with difficult intubation with the Optiscope™. In receiver operating characterstic analysis, the area under the curve for body mass index was 0.68 (95% confidence interval; 0.60 to 0.77, P < 0.001) and that for sternomental distance was 0.66 (95% confience interval; 0.57 to 0.75, P = 0.001). Conclusions The incidence of difficult intubation using the Optiscope™ under manual in-line cervical stabilization was 25.5% in cervical spine surgery patients. No significant predictor of difficult intubation with the Optiscope™ was identified among the measured radiographic indices. Although high BMI and short SMD were predictive of difficult intubation with the Optiscope™, their discrimination power was weak.
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spelling doaj.art-9c4969e641404905a949b0c8b38e7df42022-12-22T00:30:10ZengBMCBMC Anesthesiology1471-22532020-02-0120111010.1186/s12871-020-00966-3No radiographic index predicts difficult intubation using the Optiscope™ in cervical spine surgery patients: a retrospective studyHyongmin Oh0Hansol Kim1Hyun-Kyu Yoon2Hyung-Chul Lee3Hee-Pyoung Park4Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of MedicineDepartment of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of MedicineDepartment of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of MedicineDepartment of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of MedicineDepartment of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of MedicineAbstract Background The Optiscope™ can be used for intubation with minimal neck motion. We retrospectively investigated radiographic predictors of difficult intubation using the Optiscope™ by analyzing preoperative radiographic images. Methods One hundred eighty-four patients who were intubated with the Optiscope™ under manual in-line cervical stabilization for cervical spine surgery were enrolled. Radiographic indices were measured on preoperative cervical spine lateral X-ray and magnetic resonance imaging images. Difficult intubation was defined as failure or time consumption more than 90 s on the first attempt. To identify significant predictors of difficult intubation using the Optiscope™ and evaluate their diagnostic value, multivariable logistic regression and receiver operating characteristic analyses were used. Results Fourty-seven patients showed difficult intubation. There was no significant difference in radiographic indices between the difficult and easy intubation groups, but higher body mass index (BMI) (26.5 [3.0] vs. 24.6 [3.5] kg/m2, P = 0.001), shorter sternomental distance (SMD) (122.0 [104.0 to 150.0] vs. 150.0 [130.0 to 170.0] mm, P = 0.001), shorter interincisor gap (40.0 [35.0 to 45.0] vs. 43.0 [40.0 to 50.0] mm, P = 0.006), and higher incidence of excessive oral secretions (10.6% vs. 2.9%, P = 0.049) were observed in patients with difficult intubation. In multivariable analysis, BMI (odds ratio [95% confidence interval]; 1.15 [1.03 to 1.28], P = 0.011) and SMD (odds ratio [95% confidence interval]; 0.98 [0.97 to 1.00], P = 0.008) were associated with difficult intubation with the Optiscope™. In receiver operating characterstic analysis, the area under the curve for body mass index was 0.68 (95% confidence interval; 0.60 to 0.77, P < 0.001) and that for sternomental distance was 0.66 (95% confience interval; 0.57 to 0.75, P = 0.001). Conclusions The incidence of difficult intubation using the Optiscope™ under manual in-line cervical stabilization was 25.5% in cervical spine surgery patients. No significant predictor of difficult intubation with the Optiscope™ was identified among the measured radiographic indices. Although high BMI and short SMD were predictive of difficult intubation with the Optiscope™, their discrimination power was weak.http://link.springer.com/article/10.1186/s12871-020-00966-3Optiscope™VideostyletDifficult intubationPredictorCervical spine surgery
spellingShingle Hyongmin Oh
Hansol Kim
Hyun-Kyu Yoon
Hyung-Chul Lee
Hee-Pyoung Park
No radiographic index predicts difficult intubation using the Optiscope™ in cervical spine surgery patients: a retrospective study
BMC Anesthesiology
Optiscope™
Videostylet
Difficult intubation
Predictor
Cervical spine surgery
title No radiographic index predicts difficult intubation using the Optiscope™ in cervical spine surgery patients: a retrospective study
title_full No radiographic index predicts difficult intubation using the Optiscope™ in cervical spine surgery patients: a retrospective study
title_fullStr No radiographic index predicts difficult intubation using the Optiscope™ in cervical spine surgery patients: a retrospective study
title_full_unstemmed No radiographic index predicts difficult intubation using the Optiscope™ in cervical spine surgery patients: a retrospective study
title_short No radiographic index predicts difficult intubation using the Optiscope™ in cervical spine surgery patients: a retrospective study
title_sort no radiographic index predicts difficult intubation using the optiscope™ in cervical spine surgery patients a retrospective study
topic Optiscope™
Videostylet
Difficult intubation
Predictor
Cervical spine surgery
url http://link.springer.com/article/10.1186/s12871-020-00966-3
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