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Patients who were admitted for surgical intervention that did not include the nasal cavity and paranasal sinuses were included in this prospective cohort\u00a0study. Structured medical history was taken from the patients, including the following: age, sex, smoking history, alcohol intake, current medications, and sleep deficits prior to surgery. Before surgery, patients were asked for a self-rating of their olfactory function. Olfactory function was also measured using Sniffin\u2019 Sticks comprising measures of odor threshold, discrimination, and identification. The mean interval between olfactory tests was 6\u00a0days (range 3\u201312\u00a0days). Seventy-three patients were included in the study, 34 men and 39 women. Olfactory scores were consistent before and after surgery as indicated by correlative analyses (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05). Odor thresholds, discrimination, identification, and composite TDI scores did not change significantly, whereas odor identification scores increased (<jats:italic>p<\/jats:italic>\u2009=\u20090.011) after surgery. In conclusion,\u00a0post-operative olfactory scores remained stable. However, identification scores exhibited a slight increase which can be attributed to a retest effect. Overall, the present results indicate that surgery outside of the nasal and paranasal sinus region performed in general anesthesia has no major effect on the sense of smell.<\/jats:p>","DOI":"10.1038\/s41598-021-03400-x","type":"journal-article","created":{"date-parts":[[2021,12,13]],"date-time":"2021-12-13T11:04:31Z","timestamp":1639393471000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Olfactory function testing before and after anesthesia"],"prefix":"10.1038","volume":"11","author":[{"given":"Anna Kristina","family":"Hernandez","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Patrick","family":"Fuchss","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Antje","family":"Haehner","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas","family":"Hummel","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,12,13]]},"reference":[{"key":"3400_CR1","doi-asserted-by":"crossref","first-page":"1","DOI":"10.4193\/Rhino16.248","volume":"54","author":"T Hummel","year":"2017","unstructured":"Hummel, T. et al. 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