ENT Medical Calculators

Clinical calculation tools for otolaryngology practice

Lidocaine Dose Calculator

Calculate maximum safe lidocaine doses with and without epinephrine

Epinephrine Dilution Calculator

Calculate epinephrine dilutions for topical use in ENT procedures

Pure Tone Average (PTA) Calculator

Calculate pure tone average and classify hearing loss severity

Neck Dissection Classification

Identify neck dissection type based on levels and structures removed

SNOT-22 Score Calculator

Calculate Sinonasal Outcome Test score (simplified version)

Rate each symptom from 0 (no problem) to 5 (worst possible)

Body Surface Area (BSA)

Calculate BSA using Mosteller formula for medication dosing

References & Sources

Lidocaine Dose Calculator

  1. American Society of Anesthesiologists. Practice Guidelines for Moderate Procedural Sedation and Analgesia 2018. Anesthesiology. 2018;128(3):437-479.
  2. Neal JM, et al. ASRA Practice Advisory on Local Anesthetic Systemic Toxicity. Reg Anesth Pain Med. 2018;43(2):113-123.
  3. Rosenberg PH, et al. Maximum recommended doses of local anesthetics: a multifactorial concept. Reg Anesth Pain Med. 2004;29(6):564-575.

Epinephrine Dilution Calculator

  1. Manes RP. Evaluating and managing the patient with nosebleeds. Med Clin North Am. 2010;94(5):903-912.
  2. Rudmik L, Smith TL. Evidence-based practice: Postoperative care in endoscopic sinus surgery. Otolaryngol Clin North Am. 2012;45(5):1019-1032.

Pure Tone Average (PTA) Calculator

  1. World Health Organization. Grades of hearing impairment. Geneva: WHO; 2021.
  2. American Speech-Language-Hearing Association. Degree of Hearing Loss. Available at: www.asha.org
  3. Clark JG. Uses and abuses of hearing loss classification. ASHA. 1981;23(7):493-500.

Neck Dissection Classification

  1. Robbins KT, et al. Consensus statement on the classification and terminology of neck dissection. Arch Otolaryngol Head Neck Surg. 2008;134(5):536-538.
  2. Ferlito A, et al. Neck dissection: then and now. Auris Nasus Larynx. 2006;33(4):365-374.
  3. American Head and Neck Society. Neck Dissection Classification. Available at: www.ahns.info

SNOT-22 Score Calculator

  1. Hopkins C, et al. Psychometric validity of the 22-item Sinonasal Outcome Test. Clin Otolaryngol. 2009;34(5):447-454.
  2. Rudmik L, et al. Defining appropriateness criteria for endoscopic sinus surgery during management of uncomplicated adult chronic rhinosinusitis. Int Forum Allergy Rhinol. 2016;6(6):557-567.
  3. DeConde AS, et al. Responsiveness of patient-reported outcome measures in chronic rhinosinusitis. J Allergy Clin Immunol Pract. 2015;3(5):719-725.

Body Surface Area (BSA) Calculator

  1. Mosteller RD. Simplified calculation of body-surface area. N Engl J Med. 1987;317(17):1098.
  2. Du Bois D, Du Bois EF. A formula to estimate the approximate surface area if height and weight be known. Arch Intern Med. 1916;17:863-871.
  3. Verbraecken J, et al. Body surface area in normal-weight, overweight, and obese adults. A comparison study. Metabolism. 2006;55(4):515-524.

Disclaimer: These calculators are for educational and informational purposes only. They do not replace professional medical judgment. Always verify calculations independently and consult current clinical guidelines. Dosing should be individualized based on patient characteristics, comorbidities, and clinical context.