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General ENT & Therapeutics

ENT Medical Calculators

A set of everyday clinical calculators for otolaryngology practice — local anesthetic dosing, epinephrine dilution, audiometry, neck dissection classification, sinonasal scoring, and body surface area.

Anesthetic dosing

Lidocaine Maximum Dose

Maximum safe lidocaine with and without epinephrine.

Patient weight (kg)

Without epinephrine

With epinephrine

Maximum recommended doses — always weigh patient factors and clinical context.

Topical preparation

Epinephrine Dilution

Prepare a target epinephrine dilution for topical use.

Starting concentration Desired concentration Total volume (mL)

Epinephrine

Normal saline

Audiometry

Pure Tone Average (PTA)

Average thresholds and classify hearing-loss severity.

500 Hz

1000 Hz

2000 Hz

4000 Hz · opt

Pure tone average

Head & neck

Neck Dissection Classification

Classify the dissection from levels and structures.

Levels removed

Level {{ lv.label }}

Structures preserved

SCM IJV CN XI

Levels {{ neckLevelsStr }}

Preserved: {{ neckPreserved }}

Rhinology

Sinonasal Symptom Score

Simplified 8-item score — not the validated 22-item SNOT-22. Rate each 0 (none) to 5 (worst).

Total score

General

Body Surface Area (BSA)

Mosteller and Du Bois BSA for medication dosing.

Weight (kg)

Height (cm)

Mosteller

Du Bois

Disclaimer. These calculators are for educational and informational purposes only and do not replace professional medical judgment. Always verify calculations independently and consult current clinical guidelines. Dosing must be individualized.