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      Therapeutics and Clinical Risk Management (submit here)

      This international, peer-reviewed Open Access journal by Dove Medical Press focuses on reporting of clinical studies, outcomes and safety in all therapeutic areas and surgical intervention areas. Sign up for email alerts here.

      34,006 Monthly downloads/views I 2.755 Impact Factor I 4.5 CiteScore I 1.0 Source Normalized Impact per Paper (SNIP) I 0.598 Scimago Journal & Country Rank (SJR)

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      Comparison of the glottic view during video-intubation in super obese patients: a series of cases

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      Publication date (Electronic):
      Journal: Therapeutics and Clinical Risk Management
      Publisher: Dove Medical Press
      Keywords: super obese, videolaryngoscopes, intubation, glottic visualization

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          Abstract

          Videolaryngoscopes improve the view of the entry to the larynx in morbidly obese patients. Super obesity is one of the risk factors for difficult mask ventilation as well as difficult intubation. Super obese patients should be intubated awake either with a fiber-optic scope or with a videolaryngoscope. The glottic view during video-intubation in super obese patients using different devices was compared. The McGrath MAC (MGM) was used in all patients and then compared to the King Vision (KV) in three patients, the APA videolaryngoscope in two patients and the Airtraq Avant with a video camera in four patients. The pictures were of the same patient for two used devices. All obtained images were analyzed using the Percentage of Glottic Opening (POGO) scale. The POGO score for the MGM was better than for the KV and the APA but comparable to the Airtraq device. The images were processed electronically, and the best view of the laryngeal inlet that was obtained by the evaluated devices in the same patient was superimposed onto the other one and then compared.

          Most cited references22

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          Assessment of airway visualization: validation of the percentage of glottic opening (POGO) scale.

          S Kush, E A Ochroch, E Andrew Ochroch … (1998)
          Research defining optimal methods of intubation has been limited by the lack of a validated outcome measure to assess airway visualization. The objective of this study was to develop a reliable scale for the assessment of airway visualization during endotracheal intubation. This prospective study was performed to assess the intra- and interphysician reliabilities of emergency physicians (EPs) for estimating the percentage of glottic opening (POGO) that is visualized during direct laryngoscopy. Using video images of laryngeal views obtained from a commercially available videotape, still slide images were prepared representing glottic openings ranging from 0% to 100%. Five EPs, blinded to study objective, reviewed 25 pairs of airway slides (50 slides total). For each slide, the physicians recorded the POGO and their scores using a modified Cormack-Lehane (MCL) scale, where grade I is a view of the full glottic opening, MCL grade II is a partial view of the glottic opening, and MCL grade III is a view of the epiglottis only. Inter- and intraphysician reliabilities were assessed using the kappa statistic (K) for MCL grade and intraclass correlation coefficient for the POGO scores. For the POGO score, the degree of intrarater reliability was very good, with an intraphysician correlation of 0.85 and an interphysician correlation of 0.74. For the MCL score, the intraphysician concordance had a K of 0.71, and interphysician concordance was also good, with a kappa of 0.59. Both the modified version of the Cormack-Lehane grading classification and the POGO score have good interphysician and intraphysician reliabilities. Because the POGO score can distinguish patients with large and small degrees of partial glottic visibility, it might provide a better outcome for assessing the difference between various intubation techniques.
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            High body mass index is a weak predictor for difficult and failed tracheal intubation: a cohort study of 91,332 consecutive patients scheduled for direct laryngoscopy registered in the Danish Anesthesia Database.

            Jacob Astrup, Lars Lundstrøm, Charlotte Rosenstock … (2009)
            Previous studies have failed to detect high body mass index (BMI) as a risk factor for difficult tracheal intubation (DTI). BMI was investigated as a risk factor for DTI in patients planned for direct laryngoscopy. A cohort of 91,332 consecutive patients planned for intubation by direct laryngoscopy was retrieved from the Danish Anesthesia Database. A four-point scale to grade the tracheal intubation was used. Age, sex, American Society of Anesthesiologists physical status classification, priority of surgery, history of previous DTI, modified Mallampati-score, use of neuromuscular blocker, and BMI were retrieved. Logistic regression to assess whether BMI was associated with DTI was performed. The frequency of DTI was 5.2% (95% confidence interval [CI] 5.0-5.3). In multivariate analyses adjusted for other significant covariates, BMI of 35 or more was a risk for DTI with an odds ratio of 1.34 (95% CI 1.19-1.51, P < 0.0001). As a stand alone test, BMI of 35 or more predicted DTI with a sensitivity of 7.5% (95% CI 7.3-7.7%) and with a predictive value of a positive test of 6.4% (95% CI 6.3-6.6%). BMI as a continuous covariate was a risk for failed intubation with an odds ratio of 1.031 (95% CI 1.002-1.061, P < 0.04). High BMI is a weak but statistically significant predictor of difficult and failed intubation and may be more appropriate than weight in multivariate models of prediction of DTI.
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              Tracheal intubation of morbidly obese patients: a randomized trial comparing performance of Macintosh and Airtraq laryngoscopes.

              S.-K Ndoko, L El Hosseiny, R Amathieu … (2008)
              The Airtraq laryngoscope is designed to allow visualization of the glottis without alignment of the oral, pharyngeal, and laryngeal axes. We hypothesized that this new airway device would facilitate tracheal intubation of morbidly obese patients. We compared tracheal intubation performance of standard Macintosh laryngoscope with the Airtraq laryngoscope in morbidly obese patients. One hundred and six consecutive ASA I-III morbidly obese patients undergoing surgery were randomized to intubation with the Macintosh laryngoscope or the Airtraq laryngoscope. Induction of anaesthesia was standardized. If tracheal intubation failed within 120 s with the Macintosh or Airtraq , laryngoscopes were switched. Success rate, SpO2, duration of tracheal intubation, and quality of airway management were evaluated and compared between the groups. Preoperative characteristics of the patients were similar in both groups. In the Airtraq group, tracheal intubation was successfully carried out in all patients within 120 s. In the Macintosh laryngoscope group, six patients required intubation with the Airtraq laryngoscope. The mean (SD) time taken for tracheal intubation was 24 (16) and 56 (23) s, respectively, with the Airtraq and Macintosh laryngoscopes, (P<0.001). SpO2 was better maintained in the Airtraq group than in the Macintosh laryngoscope group with one and nine patients, respectively, demonstrating drops of SpO2 to 92% or less (P<0.05). In this study, the Airtraq laryngoscope shortened the duration of tracheal intubation and prevented reductions in arterial oxygen saturation in morbidly obese patients.
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                Author and article information

                Journal
                Journal ID (nlm-ta): Ther Clin Risk Manag
                Journal ID (iso-abbrev): Ther Clin Risk Manag
                Journal ID (publisher-id): Therapeutics and Clinical Risk Management
                Title: Therapeutics and Clinical Risk Management
                Publisher: Dove Medical Press
                ISSN (Print): 1176-6336
                ISSN (Electronic): 1178-203X
                Publication date Collection: 2016
                Publication date (Electronic): 11 November 2016
                Volume: 12
                Pages: 1677-1682
                Affiliations
                Department of Anaesthesiology and Intensive Therapy, Medical University of Łódź, Łódź, Poland
                Author notes
                Correspondence: Tomasz Gaszyński, Department of Anaesthesiology and Intensive Therapy, Medical University of Łódź, ulica Kopcińskiego 22, 90-153 Łódź, Poland, Tel +48 42 678 3748, Email tomasz.gaszynski@ 123456umed.lodz.pl
                Article
                Publisher ID: tcrm-12-1677
                DOI: 10.2147/TCRM.S118339
                PMC ID: 5113935
                PubMed ID: 27956835
                SO-VID: b26f0395-531b-4850-8d62-1044649c2b18
                Copyright statement: © 2016 Gaszyński. This work is published and licensed by Dove Medical Press Limited
                License:

                The full terms of this license are available at https://www.dovepress.com/terms.php and incorporate the Creative Commons Attribution – Non Commercial (unported, v3.0) License ( http://creativecommons.org/licenses/by-nc/3.0/). By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed.

                History
                Categories
                Subject: Case Series

                ScienceOpen disciplines: Medicine
                Keywords: super obese,videolaryngoscopes,intubation,glottic visualization
                Data availability:
                ScienceOpen disciplines: Medicine
                Keywords: super obese, videolaryngoscopes, intubation, glottic visualization

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