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Utility of Smartphone Telemedical Consultations for Peritonsillar Abscess Diagnosis and Triage.

Importance: Telemedicine is rapidly gaining traction as a way to reduce costs and connect patients with medical experts outside their local communities. Peritonsillar abscess (PTA) is a logical pathologic condition to evaluate for effectiveness of remote diagnosis given its prevalence and the paucity of on-site otolaryngologists at many institutions.

Objective: To explore the potential of otolaryngology telemedical consultation in triaging and diagnosing patients with suspected PTA.

Design, Setting, and Participants: A comparative effectiveness research study was conducted from January 1 to June 30, 2018, at 3 tertiary care hospitals among 31 consecutive patients aged 18 to 85 years for whom the otolaryngology department was consulted to assess for PTA. Statistical analysis was conducted from July 1 to September 30, 2018.

Interventions: Telemedical evaluation of suspected PTA by 5 attending otolaryngologists blinded to patients' history aside from the chief report of odynophagia. Otolaryngologists rated each patient video on whether they believed the patient had a PTA and whether the case warranted prompt evaluation by an otolaryngologist. Predictions were compared with the criterion standard of drainage or negative needle aspiration. Otolaryngologists additionally assessed video quality.

Main Outcomes and Measures: Rates of accurate diagnosis and triage of PTA based on otolaryngologists' review of oropharyngeal examinations recorded using standard smartphone cameras, as well as percentage of videos of oropharyngeal examinations using standard smartphone cameras deemed of sufficiently high quality for clinical decision-making.

Results: A total of 31 patients (16 women [51.6%]; mean age, 31.9 years [range, 18-62 years]) were recruited, and 16 patients (51.6%) had a PTA. Comparing otolaryngologists' predictions with PTA status by the criterion standard, the prediction was consistent with that of the criterion standard 81% of the time averaged across otolaryngologists (mean diagnostic accuracy, 0.81). Similarly, the mean diagnostic accuracy was 0.83 when comparing the otolaryngologist's suggestion for a prompt in-person evaluation with actual PTA status by the criterion standard. Comparing patients who were deemed to require prompt otolaryngology evaluation and those with PTA by the criterion standard, mean sensitivity was 90%. Videos were rated as of sufficiently high quality to make a diagnosis in 154 of 155 videos (99.4%).

Conclusions and Relevance: This study suggests that telemedical consultation is a viable, cost-conscious, efficient, and safe approach to PTA management. Despite having some difficulty diagnosing PTAs based on "history concerning for PTA" and oropharyngeal video alone, otolaryngologists are able to determine, with high sensitivity, which patients require prompt otolaryngology evaluation. The recording of consistently high-quality video using a standard smartphone camera is achievable without formal training.

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