EN2.1-12 | Core ENT Clinical Skills — Practice Quiz

Correct. In right conductive hearing loss: Rinne is NEGATIVE on the right (bone conduction exceeds air conduction because the sound-conducting mechanism is impaired), while the left ear shows normal Rinne positive. Weber lateralises to the RIGHT (affected ear) because bone-conducted sound is perceived louder on the side with the conductive block — the masking effect of ambient noise is reduced.

Rinne POSITIVE = AC > BC = normal or SNHL. Rinne NEGATIVE = BC > AC = conductive loss. Weber lateralises TO the affected ear in conductive loss. These two tests together localise the type and side of hearing loss — never invert the Rinne interpretation.

Rinne POSITIVE means air conduction > bone conduction, which is the NORMAL finding (or occurs with SNHL). Rinne NEGATIVE = bone conduction > air conduction = conductive loss. Weber lateralises TO the affected ear in conductive loss and AWAY (to the better ear) in sensorineural loss. Never invert these relationships.

Correct. The antero-inferior quadrant is the standard safe site for myringotomy. This quadrant avoids the ossicular chain (located postero-superiorly), the chorda tympani nerve, and the high-riding jugular bulb that can occupy the postero-inferior area. It provides direct drainage access to the Eustachian tube end of the middle ear.

Safe myringotomy site = antero-inferior quadrant. The postero-superior quadrant is avoided because of the underlying ossicular chain (incudostapedial joint) and round window niche. The postero-inferior quadrant overlies the jugular bulb in some anatomical variants. Antero-inferior = safe zone.

The postero-superior quadrant is the most dangerous site — it overlies the ossicular chain (incudostapedial joint), the oval window region, and the facial nerve. The postero-inferior quadrant may overlie a high-riding jugular bulb. The antero-superior quadrant is less commonly used. Always use the antero-inferior quadrant for myringotomy.

Correct. Standard tracheostomy is performed between the 2nd and 3rd tracheal rings. Cutting the 1st ring risks subglottic stenosis; going below the 4th ring risks injury to the innominate (brachiocephalic) artery. This is an elective airway procedure — for an emergency, a cricothyroidotomy through the cricothyroid membrane is used instead.

Tracheostomy = elective/planned airway procedure, incision between the 2nd and 3rd tracheal rings (standard). Cricothyroidotomy = emergency airway, through the cricothyroid membrane. Never conflate these. The 1st ring is avoided (subglottic stenosis risk); going too low risks innominate artery erosion.

The 1st tracheal ring is avoided in tracheostomy because its disruption leads to subglottic stenosis. Levels 4–5 risk innominate artery erosion. The cricothyroid membrane is the site of cricothyroidotomy — the EMERGENCY airway access — not elective tracheostomy. An elective tracheostomy is always sited at the 2nd–3rd tracheal ring level.

Correct. This audiogram shows normal bone conduction (≤25 dB) with elevated air conduction thresholds (50 dB), creating an air-bone gap of approximately 25 dB. This pattern is diagnostic of conductive hearing loss — the cochlea and auditory nerve are intact (normal BC), but sound transmission through the outer/middle ear is impaired (elevated AC). Causes include otitis media with effusion, tympanic membrane perforation, or ossicular chain disruption.

Pure tone audiogram interpretation: (1) SNHL = both AC and BC elevated, AC–BC gap ≤10 dB. (2) Conductive loss = AC elevated, BC normal, air-bone gap ≥15 dB. (3) Mixed = both elevated, but AC–BC gap still present. Here AC is 50 dB and BC is normal — this is a pure conductive pattern with a large air-bone gap.

In SNHL both air and bone conduction are elevated with no significant air-bone gap (AC ≈ BC). In mixed hearing loss both AC and BC are elevated, but an air-bone gap is still present. Functional hearing loss shows inconsistent audiometric results across tests. The pattern here — normal BC with elevated AC — is the hallmark of pure conductive hearing loss.

Correct. The Thudichum's nasal speculum blades are inserted in a closed, vertical position along the nasal axis. Spreading the handles (which opens the blades vertically) dilates the naris upward and downward, providing a clear view of the nasal cavity. The examiner then systematically examines three positions: the nasal floor, the middle meatus, and (with head tilted back) the olfactory area.

Thudichum's nasal speculum technique: insert blades closed in a vertical orientation along the axis of the naris; spread vertically (upward-downward) to dilate the naris; examine in 3 positions — floor (inferior turbinate/meatus), middle turbinate/meatus (15° superior), and olfactory cleft (45° superior tilt of patient's head). Spreading laterally risks alar cartilage fracture.

Horizontal or lateral spreading risks trauma to the alar cartilages and the columella. The speculum blades should be inserted vertically and spread vertically (upward–downward axis), not laterally. The correct technique allows atraumatic examination of the inferior turbinate, the middle meatus, and the nasal septum.

Correct. Antrochoanal polyp (Killian's polyp) characteristically presents in children and young adults as a UNILATERAL, SINGLE polyp arising from the maxillary antrum, extending through the middle meatus to the choana and nasopharynx. It causes unilateral obstruction. This distinguishes it from allergic/ethmoidal polyps which are bilateral and multiple in adults with atopic disease.

Antrochoanal polyp (Killian's polyp) = unilateral, single, arises from maxillary antrum, common in children/young adults. Ethmoidal polyps = bilateral, multiple, in adults with allergic background. Never swap laterality: unilateral + single + child = antrochoanal polyp until proven otherwise.

Ethmoidal polyps are bilateral and multiple, occurring in adults with allergic rhinitis or eosinophilic disease — they do not fit the unilateral, single, paediatric presentation. Inverted papilloma is a benign neoplasm in middle-aged/elderly patients. JNA (juvenile nasopharyngeal angiofibroma) presents in adolescent males with recurrent epistaxis and nasal obstruction but is highly vascular — biopsy is contraindicated; the polyp here is non-vascular and in a 10-year-old girl.

Correct. The core of informed consent is disclosure of material risks (e.g., septal haematoma, perforation, altered nasal sensation, anaesthetic risk, bleeding, infection), benefits (improved airway, reduced symptoms), alternatives (conservative management, other surgical approaches), and expected recovery. For septoplasty, specific risks to mention include saddle deformity, anosmia, and the possibility of persistent deviation requiring revision surgery.

Informed consent (EN2.9) requires four elements: (1) diagnosis/indication, (2) nature of the proposed procedure, (3) material risks (including common AND serious rare risks), (4) alternatives including no treatment. The patient must understand and voluntarily agree. Anaesthetic preference and cost are important but secondary to the medico-legal core elements of risk disclosure.

While explaining surgical technique and discussing anaesthetic options are part of consent, the legally and ethically binding requirement is disclosure of material risks, benefits, and alternatives — the information a reasonable patient would need to make a decision. Surgical technique details and cost, while informative, are not the core legal components of valid consent.

Correct. Glottic carcinoma originates on the true vocal cords (glottis). Even a small lesion disrupts vocal cord vibration, causing early hoarseness — the cardinal symptom. The glottis has sparse lymphatic drainage, so cervical metastases are rare at presentation, giving glottic carcinoma a better prognosis than supraglottic tumours. The confined vocal cord involvement with no supraglottic or subglottic spread further confirms T1–T2 glottic staging.

Glottic carcinoma = commonest laryngeal cancer, arises on the true vocal cords, presents EARLY with hoarseness (even tiny lesions affect phonation), has GOOD prognosis because of poor lymphatic drainage of the vocal cords (late/rare nodal spread). Supraglottic carcinoma presents late (no early hoarseness) with cervical nodal spread. Persistent hoarseness >3 weeks demands laryngoscopy to exclude malignancy.

Supraglottic carcinoma (epiglottis, aryepiglottic folds, arytenoids) presents late — hoarseness is a late sign, but cervical nodes are commonly involved early due to rich supraglottic lymphatics. Subglottic carcinoma is rare and presents with airway obstruction rather than hoarseness. Transglottic carcinoma crosses the glottis involving multiple subsites. The vocal cord-confined lesion with early hoarseness is classic for glottic carcinoma.

Correct. The NPPCD mandates school-based hearing screening for children aged 5–14 years using free-field audiometry (whisper test, voice test) and, where available, screening audiometry. This identifies conductive hearing loss (e.g., otitis media with effusion — very common at school age) and undetected SNHL that impairs learning. Neonatal OAE screening is a separate NPPCD component targeting neonates and infants.

NPPCD targets all age groups but school-entry and school-age screening (5–14 years) uses behavioural audiometry / school screening audiogram in the community setting. Neonatal screening uses OAE/AABR. Elderly use pure tone audiometry. The question tests knowledge of the programme's age-appropriate screening modalities.

OAE screening is optimal for neonates and infants (newborn hearing screening). Tympanometry alone does not measure hearing threshold — it assesses middle ear function. Screening at 4 kHz only is insufficient for a comprehensive school-age screen. School-age children require behavioural audiometry to capture the full frequency range relevant to speech and learning.

Correct. The first step in any ear foreign body management is otoscopic assessment to identify: (1) type of foreign body (live insect, organic matter, inorganic), (2) position relative to the tympanic membrane, (3) integrity of the tympanic membrane (perforation contraindicates syringing). Only after this assessment can the correct extraction technique be chosen — right-angled hook, crocodile forceps, or syringing. For live insects, instil mineral oil to kill the insect before extraction.

Foreign body (FB) in ear: ALWAYS otoscope first — assess type (organic, live insect, inorganic), position, proximity to tympanic membrane, and any pre-existing perforation. Strategy depends entirely on FB type. Blind probing without visualisation risks pushing the FB deeper or perforating the tympanic membrane. Live insects should be killed first with mineral oil before extraction.

Attempting blind removal without visualisation risks impacting the foreign body or perforating the tympanic membrane. Valsalva manoeuvre is not appropriate for ear foreign bodies. Ear drops do not dissolve foreign bodies. Warm water irrigation (aural syringing) is contraindicated if the tympanic membrane is perforated or if the foreign body is hygroscopic (expands on wetting).