{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T14:24:49Z","timestamp":1787063089914,"version":"build-2736575974"},"reference-count":23,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"4","license":[{"start":{"date-parts":[[2025,3,13]],"date-time":"2025-03-13T00:00:00Z","timestamp":1741824000000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-sa\/4.0"}],"content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2025,4]]},"abstract":"<jats:sec>\n                    <jats:title>Background and Aims:<\/jats:title>\n                    <jats:p>Airway ultrasonography (USG) parameters have been used to predict difficult tracheal intubation. However, the available literature on this topic is still controversial. This study aims to assess the role of preoperative airway USG parameters, namely hyomental distance in the head neutral (HMDn), head extended position (HMDe) and their ratio (HMDR), pre-epiglottic space (PreE), and the distance from the epiglottis to the vocal cords midpoint (E-VC) and their ratio (PreE\/E-VC), in predicting difficult intubation.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>This prospective observational study was conducted on 190 patients. Preoperative USG airway parameters were measured. The primary outcome was to correlate these USG parameters with the Cormack-Lehane (CL) grade. The secondary outcome was to correlate these USG parameters with the intubation difficulty score (IDS). Kendall\u2019s tau correlation test and receiver operating characteristic curve analysis were performed.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      A positive correlation was observed between PreE\/E-VC ratio and CL grade [Kendall\u2019s tau: 0.423 (95% confidence interval (CI): 0.326, 0.513;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      &lt; 0.0001], while HDMR showed a non-significant correlation with CL grade [Kendall\u2019s tau: \u22120.0614 (95%CI: \u22120.183, 0.0569);\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = 0.211]. PreE\/E-VC ratio also showed a positive correlation with IDS [Kendall\u2019s tau: 0.391 (95%CI: 0.305, 0.471);\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = &lt;0.0001), while HDMR did not show any correlation with IDS [Kendall\u2019s tau: \u22120.0405 (95%CI: \u22120.174, 0.084);\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      = 0.409]. PreE\/E-VC ratio &gt;1.61 cm had 77.8% sensitivity and specificity of 86% to predict CL grade &gt;2, while ratio &gt;1.18 cm had a sensitivity of 71.7% and specificity of 76.4% to predict IDS \u22651.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>The USG measurement of the PreE\/E-VC ratio correlated with CL grade and IDS, while HMDR poorly correlated with CL grade and IDS and thus failed to predict difficult intubation.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.4103\/ija.ija_1066_24","type":"journal-article","created":{"date-parts":[[2025,3,13]],"date-time":"2025-03-13T09:02:19Z","timestamp":1741856539000},"page":"372-379","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":4,"title":["Can point-of-care ultrasound predict the difficulty in intubation? \u2013 A prospective observational study"],"prefix":"10.4103","volume":"69","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7863-3604","authenticated-orcid":false,"given":"Roopali","family":"Phulli","sequence":"first","affiliation":[{"name":"Department of Anaesthesiology, Rajiv Gandhi Cancer Institute and Research Centre, Rohini, Delhi, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8211-253X","authenticated-orcid":false,"given":"Samarjit","family":"Dey","sequence":"additional","affiliation":[{"name":"Department of Anaesthesiology, AIIMS, Mangalagiri, Andhra Pradesh, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3593-2313","authenticated-orcid":false,"given":"Indubala","family":"Maurya","sequence":"additional","affiliation":[{"name":"Department of Anaesthesiology, Kalyan Singh Super Speciality Cancer Institute, Lucknow, Uttar Pradesh, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7139-4842","authenticated-orcid":false,"given":"Praveen K.","family":"Neema","sequence":"additional","affiliation":[{"name":"Department of Cardiac Anaesthesia, Amrita Institute of Medical Sciences, Kochi, Kerala, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6632-0491","authenticated-orcid":false,"given":"Habib Md Reazaul","family":"Karim","sequence":"additional","affiliation":[{"name":"Department of Anaesthesiology, AIIMS, Raipur, Chhattisgarh, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0154-9559","authenticated-orcid":false,"given":"H. N Lohith","family":"Kumar","sequence":"additional","affiliation":[{"name":"Department of Anaesthesiology, AIIMS, Raipur, Chhattisgarh, India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","published-online":{"date-parts":[[2025,3,13]]},"reference":[{"issue":"Suppl 1","key":"R1-20260422","doi-asserted-by":"crossref","first-page":"i68","DOI":"10.1093\/bja\/aes393","article-title":"Complications and failure of airway management","volume":"109","author":"Cook","year":"2012","journal-title":"Br J Anaesth"},{"key":"R2-20260422","doi-asserted-by":"crossref","first-page":"1022","DOI":"10.4103\/ija.IJA_492_19","article-title":"The usefulness of point-of-care ultrasound (POCUS) in pre-anaesthetic airway assessment","volume":"63","author":"Koundal","year":"2019","journal-title":"Indian J Anaesth"},{"key":"R3-20260422","doi-asserted-by":"crossref","first-page":"1155","DOI":"10.1111\/j.1399-6576.2011.02518.x","article-title":"Ultrasonography in the management of the airway","volume":"55","author":"Kristensen","year":"2011","journal-title":"Acta Anaesthesiol Scand"},{"key":"R4-20260422","first-page":"257","volume":"63","author":"Jain","year":"2019","journal-title":"Radiological evaluation of airway \u2013 What an anaesthesiologist needs to know! 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