ENT Calculators

Predicts likelihood of Group A Streptococcal (GAS) pharyngitis to guide antibiotic prescribing. McIsaac modification adds age adjustment.

Radiological staging system for chronic rhinosinusitis using CT sinus scoring. Each sinus scored 0-2. Maximum score 24.

Clinical scoring system for acute epistaxis to guide treatment escalation from simple first aid to intervention.

Evidence-based criteria for tonsillectomy in recurrent tonsillitis. Requires ≥7 episodes in 1 year, ≥5/year for 2 years, or ≥3/year for 3 years.

Clinical assessment and diagnostic criteria for Benign Paroxysmal Positional Vertigo (BPPV) based on Dix-Hallpike findings.

Interprets Snellen chart visual acuity measurements. Standard notation: 6/x metres (UK) or 20/x feet (US). Used to screen for visual impairment, assess driving eligibility, and guide referral to ophthalmology.

Pseudoisochromatic plate test for identifying congenital red-green colour vision deficiency. Standard 24-plate test: 17+ correct = normal; 13 or fewer = colour vision deficiency. Important for certain occupations (aviation, driving, certain clinical roles).

Classifies acute rhinosinusitis severity and guides antibiotic prescribing based on EPOS 2020 guidelines.

Patient-reported outcome measure for chronic rhinosinusitis. Score 0-110; higher scores indicate greater disease burden. Guides treatment decisions and surgical referral.

Grades severity of hearing loss based on average hearing threshold (dB HL) per WHO classification. Guides audiological and surgical referral.

Predicts likelihood of Group A streptococcal pharyngitis/tonsillitis to guide antibiotic prescribing. Developed in UK primary care.

Screens for obstructive sleep apnoea (OSA) using 8 dichotomous questions. High risk guides polysomnography referral and perioperative planning.

Quantifies epistaxis severity to guide management from first aid to surgical intervention. Considers frequency, volume, and haemodynamic impact.

Differentiates central (stroke) from peripheral vertigo using Head Impulse, Nystagmus, Test of Skew (HINTS) plus hearing loss. Outperforms early MRI for posterior fossa stroke.

Grades acute otitis media severity to guide antibiotic prescribing vs watchful waiting in children and adults.