The sense of smell is not strongly affected by ambient temperature and humidity: a prospective study in a controlled environment

Drews, Tanja; Nehring, M.; Werner, Annett; Hummel, Thomas

doi:10.1007/s00405-020-06436-3

Cited by 6 publications

(5 citation statements)

References 18 publications

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“…Evidence from the population is relatively lacking, and no positive association has been found so far. [34][35][36] However, the sample sizes of the existing studies were small, involving only approximately 10 or 50 participants, and did not take the lag effect of ambient temperature on the sense of smell into account.…”

Section: Discussionmentioning

confidence: 99%

“…Animal experiments from blowflies, 31 drosophilas, 32 and turtles 33 have shown a nonlinear association, and high ambient temperature can lead to loss or decreased sense of smell. Evidence from the population is relatively lacking, and no positive association has been found so far 34–36 . However, the sample sizes of the existing studies were small, involving only approximately 10 or 50 participants, and did not take the lag effect of ambient temperature on the sense of smell into account.…”

Section: Discussionmentioning

confidence: 99%

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Association between ambient temperature and chronic rhinosinusitis

Jiao

et al. 2023

Int Forum Allergy Rhinol

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BackgroundChronic exposure to particulate matter air pollution (PM2.5) is associated with chronic rhinosinusitis (CRS). Elevated ambient temperature may increase PM2.5 levels and thereby exacerbate sinonasal symptoms. This study investigates the association between high ambient temperature and the risk of CRS diagnosis.MethodsPatients with CRS were diagnosed at Johns Hopkins hospitals from May to October 2013–2022, and controls were matched patients without CRS meanwhile. A total of 4752 patients (2376 cases and 2376 controls) were identified with a mean (SD) age of 51.8 (16.8) years. The effect of maximum ambient temperature on symptoms was estimated with a distributed lag nonlinear model (DLNM). Extreme heat was defined as 35.0°C (95th percentile of the maximum temperature distribution). Conditional logistic regression models estimated the association between extreme heat and the risk of CRS diagnosis.ResultsExposure to extreme heat was associated with increased odds of exacerbation of CRS symptoms (odds ratio [OR] 1.11, 95% confidence interval [CI] 1.03–1.19). The cumulative effect of extreme heat during 0–21 lag days was significant (OR 2.37, 95% CI 1.60–3.50) compared with the minimum morbidity temperature (MMT) at 25.3°C. Associations were more pronounced among young and middle‐aged patients and patients with abnormal weight.ConclusionsWe found that short‐term exposure to high ambient temperature is associated with increased CRS diagnosis, suggesting a cascading effect of meteorological phenomena. These results highlight climate change's potentially deleterious health effects on upper airway diseases, which could have a significant public health impact.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Association between ambient temperature and chronic rhinosinusitis

Jiao

et al. 2023

Int Forum Allergy Rhinol

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“…It also seems likely that (when tested outdoors) wind and turbulence have an influence on the transport of substance particles to olfactory cells. The sense of smell does not appear to be affected by temperature or humidity in healthy young subjects [ 28 ]. In contrast, current barometric pressure showed an effect on threshold odor sensitivity in previous studies but not on suprathreshold scent discrimination [ 29 ].…”

Section: Discussionmentioning

confidence: 99%

Anosmia Testing as Early Detection of SARS-CoV-2 Positivity; A Prospective Study under Screening Conditions

Jungbauer

Gerhards

Thiaucourt

et al. 2022

Life

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Sudden onset of anosmia is a phenomenon often associated with developing COVID-19 disease and has even been described as an initial isolated symptom in individual cases. In this case-control study, we investigated the feasibility of this condition as a suitable screening test in a population at risk. We performed a prospective study with a total of 313 subjects with suspected SARS-CoV-2 infection. In parallel to routine PCR analysis, a modified commercial scent test was performed to objectify the presence of potential anosmia as a predictor of SARS-CoV-2 positivity. Furthermore, a structured interview assessment of the participants was conducted. A total of 12.1% of the study participants had molecular genetic detection of SARS-CoV-2 infection in the nasopharyngeal swab. It could be demonstrated that these subjects had a significantly weaker olfactory identification performance of the scents. Further analysis of the collected data from the scent test and medical history via random forest (Boruta) algorithm showed that no improvement of the prediction power was achieved by this design. The assay investigated in this study may be suitable for screening general olfactory function. For the screening of COVID-19, it seems to be affected by too many external and internal biases and requires too elaborate and selective pre-test screening.

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“…In addition to the above, numerous other treatment options have been proposed, for example, phenytoyl ethanolamide plus luteolin 408 , acupuncture 409 , lavender syrup 410 , famotidine 411 , blocking of the stellate ganglion 412 , toki shakayaku san – a mixture of herbal medicines 413 414 , or B vitamins 415 .…”

Section: Treatment Of Quantitative Olfactory Disordersmentioning

confidence: 99%

“…Zusätzlich zu den oben genannten wurden zahlreiche andere Behandlungen vorgeschlagen, zum Beispiel Phenytoyl-Ethanolamid plus Luetolin 408 , Akupunktur 409 , Lavendelsirup 410 , Famotidin 411 , Blockierung des Ganglion stellatum 412 , Toki-shakuyaku-san – eine Mischung aus pflanzlichen Arzneimitteln 413 414 oder B-Vitamine 415 .…”

Section: 11 Andere Behandlungsmöglichkeitenunclassified

Riechen und Riechstörungen

Hummel

Guerra

Gunder³

et al. 2023

Laryngorhinootologie

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ZusammenfasssungDer Geruchssinn ist wichtig. Das wurde insbesondere v. a. Patient:innen mit infektbedingtem Riechverlust während der SARS-CoV2 Pandemie bewusst. Wir reagieren z. B. auf Körpergerüche unserer Mitmenschen – die Nase bestimmt/wen wir „riechen können“. Der Geruchssinn warnt uns vor Gefahren, die Wahrnehmung von Düften und die Wahrnehmung von Aromen beim Essen bedeuten Lebensqualität. Eine Anosmie muss daher ernst genommen werden. Obwohl sich olfaktorische Rezeptorneurone durch Regenerationsfähigkeit auszeichnen, sind Anosmien mit etwa 5% relativ häufig. Riechstörungen werden nach der Ursache eingeteilt (z. B. Infekte, Schädelhirntraumen, chronische Rhinosinusitis, Alter) mit den sich daraus ergebenden unterschiedlichen Therapieoptionen und Prognosen. Eine gründliche Anamnese ist deshalb bedeutsam. Zur Diagnostik stehen verschiedenste Untersuchungsverfahren zur Verfügung, von orientierenden Kurztests über ausführliche mehrdimensionale Testverfahren bis hin zu elektrophysiologischen und bildgebenden Methoden. Damit sind quantitative Riechstörungen gut erfassbar und nachverfolgbar. Bei qualitativen Riechstörungen wie der Parosmie stehen derzeit allerdings keine objektivierenden Diagnoseverfahren zur Verfügung. Die therapeutischen Möglichkeiten bei Riechstörungen sind begrenzt. Trotzdem stehen mit dem Riechtraining sowie verschiedenen additiven medikamentösen Möglichkeiten wirksame Optionen zur Verfügung. Von großer Bedeutung ist nach wie vor die Beratung und das kompetente Gespräch mit den Patient:innen.

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The sense of smell is not strongly affected by ambient temperature and humidity: a prospective study in a controlled environment

Cited by 6 publications

References 18 publications

Association between ambient temperature and chronic rhinosinusitis

Association between ambient temperature and chronic rhinosinusitis

Anosmia Testing as Early Detection of SARS-CoV-2 Positivity; A Prospective Study under Screening Conditions

Riechen und Riechstörungen

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