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

Correct. In conductive hearing loss, the Weber test lateralises to the AFFECTED side. The reason: bone-conducted vibration bypasses the blocked conductive mechanism and the affected ear experiences less environmental noise masking, making it perceive the bone-conducted tone as louder.

Weber lateralises TO the affected ear in conductive hearing loss (the blocked ear perceives bone-conducted sound as louder because ambient masking noise is excluded). Weber lateralises AWAY from the affected ear (to the better ear) in sensorineural hearing loss.

Weber lateralises to the affected ear in CONDUCTIVE loss and to the BETTER (unaffected) ear in sensorineural loss. These patterns are opposite and must not be inverted.

Correct. A Rinne NEGATIVE result means bone conduction (BC) is perceived as louder or lasts longer than air conduction (AC). This occurs in conductive hearing loss — the conductive pathway (tympanic membrane + ossicular chain) is impaired, but the cochlea and auditory nerve remain functional, so BC bypasses the blockage and is perceived better.

Rinne POSITIVE = AC > BC = NORMAL (or SNHL). Rinne NEGATIVE = BC > AC = CONDUCTIVE hearing loss. This is the single most commonly inverted fact in ENT tuning-fork test questions.

Rinne POSITIVE (AC > BC) is the normal pattern — sound through the air-conduction pathway is amplified by the tympanic membrane-ossicular lever system, making AC better than BC under normal conditions. Rinne negative reverses this and indicates a conductive block.

Correct. The antero-inferior quadrant of the tympanic membrane is the standard safe site for myringotomy. It avoids the ossicular chain (postero-superiorly), the chorda tympani nerve, and the jugular bulb (postero-inferiorly in some variants).

Myringotomy safe site = antero-inferior quadrant. The postero-superior quadrant overlies the ossicular chain and oval/round windows — the most dangerous zone. Antero-inferior is away from ossicles, chorda tympani, facial nerve, and jugular bulb.

The postero-superior quadrant is the MOST dangerous — it overlies the incudostapedial joint, the oval window, and the horizontal facial nerve segment. Postero-inferior may overlie a high jugular bulb. Antero-inferior is the canonical safe zone.

Correct. Cricothyroidotomy is the emergency surgical airway of choice — it is faster and technically simpler than tracheostomy. The cricothyroid membrane is easily palpable and superficial, with minimal bleeding risk. A surgical opening here provides immediate airway access. Tracheostomy is an elective, planned procedure performed in theatre.

Emergency airway = CRICOTHYROIDOTOMY through the CRICOTHYROID MEMBRANE. Elective/planned airway = TRACHEOSTOMY between 2nd and 3rd tracheal rings. Never conflate the emergency vs elective procedures or confuse their anatomical sites.

Tracheostomy at the 2nd–3rd tracheal ring level is an elective procedure — it requires time, haemostasis, and proper theatre conditions. Nasotracheal intubation requires a patent nasal and laryngeal airway. In complete laryngeal obstruction with imminent asphyxia, cricothyroidotomy through the easily palpable cricothyroid membrane is the emergency procedure.

Correct. Bilateral ethmoidal polyps classically occur in adults with allergic rhinitis, eosinophilia, and/or Samter's triad (nasal polyposis + aspirin sensitivity + asthma). They originate from the ethmoid sinuses and cause bilateral obstruction and anosmia. This is the polar opposite of the antrochoanal polyp, which is unilateral and single.

Ethmoidal polyps = bilateral, multiple, associated with allergy/eosinophilia/aspirin sensitivity (Samter's triad: polyps + asthma + aspirin sensitivity). Antrochoanal polyp = unilateral, single, in children/young adults without allergy association.

Antrochoanal polyp is unilateral, single, and most common in children/young adults without the atopic/aspirin-sensitive profile. Nasal dermoid is a congenital midline mass. Inverted papilloma is a neoplastic lesion in middle-aged/elderly patients.

Correct. Posterior epistaxis in elderly hypertensive patients originates from the sphenopalatine artery territory (Woodruff's area on the posterior nasal wall/floor) or from branches of the internal maxillary artery. It is not visible on anterior rhinoscopy and does not respond to anterior nasal packing alone — posterior nasal packing or sphenopalatine artery ligation/embolisation is required.

Anterior epistaxis (common, esp. in children) = Little's area / Kiesselbach's plexus on the anterior nasal septum. Posterior epistaxis (older adults, hypertensives, severe, not amenable to anterior packing) = sphenopalatine / Woodruff's area. These two sites must be distinguished clinically.

Little's area (Kiesselbach's plexus) on the anteroinferior nasal septum is the site of ANTERIOR epistaxis — common in children and young adults, easily controlled by pinching or anterior packing. Posterior bleeds in elderly hypertensives are from the sphenopalatine territory and are much harder to manage.

Correct. The hallmark of the 'unsafe' atticoantral CSOM is the presence of cholesteatoma (keratinising squamous epithelium that invades and erodes bone). It is associated with an attic (Shrapnell's membrane) or marginal perforation — not a central perforation. Bone erosion leads to ossicular destruction, labyrinthine fistula, facial nerve palsy, and intracranial complications. Mastoidectomy is mandatory.

CSOM safe (tubotympanic/mucosal) = central perforation, mucopurulent discharge, no cholesteatoma, rarely complications. CSOM unsafe (atticoantral/squamosal) = attic or marginal perforation + CHOLESTEATOMA + bone erosion + risk of intracranial complications → requires surgery (mastoidectomy). Never call cholesteatoma 'safe'.

A central perforation with mucopurulent discharge and no cholesteatoma characterises the SAFE (tubotympanic) type. Bilateral SNHL is not a distinguishing feature of safe vs unsafe CSOM. Mucopurulent discharge without bone erosion is the typical presentation of the safe type.

Correct. JNA is an extremely vascular benign tumour — biopsy under any circumstances (endoscopic, FNAC) carries the risk of catastrophic, potentially fatal haemorrhage. The diagnosis is established on clinical grounds (adolescent male + recurrent epistaxis + unilateral obstruction) supported by contrast-enhanced CT/MRI showing the characteristic enhancing nasopharyngeal mass with a feeding vessel pedicle. Angiography is used both for diagnosis and for pre-operative embolisation planning.

Juvenile nasopharyngeal angiofibroma (JNA) = adolescent males + recurrent profuse epistaxis + nasal obstruction + enhancing nasopharyngeal mass. DO NOT BIOPSY (risk of catastrophic, life-threatening haemorrhage). Diagnose on contrast CT/MRI and angiography. Surgery (endoscopic resection ± pre-operative embolisation) follows imaging staging.

Endoscopic biopsy or FNAC of a suspected JNA is absolutely contraindicated — the extraordinary vascularity can lead to uncontrollable haemorrhage that cannot be managed without surgical intervention. Posterior nasal packing is a temporising measure for epistaxis but does not constitute definitive diagnosis or treatment. Imaging and angiography must precede any tissue sampling.

Correct. In sensorineural hearing loss, the cochlea or auditory nerve is damaged. Bone-conducted sound still must be transduced by a damaged cochlea, so the patient hears the tuning fork (placed on the mastoid or forehead) for a shorter duration than a normal-hearing examiner. This reduced ABC (Schwabach's test diminished) reflects cochlear/nerve pathology.

Schwabach's test (absolute bone conduction) compares patient's BC to normal examiner's BC. In SNHL: patient's ABC is REDUCED (hears the tuning fork for shorter duration than examiner). In conductive loss: patient's ABC is NORMAL or PROLONGED (bone conduction is intact; the patient may hear it longer than normal when ambient noise is excluded by the conductive block — Bezold's negative modification). Know the SNHL pattern: reduced ABC.

Equal ABC duration suggests normal cochlear function. Increased ABC duration (prolonged) can occur in conductive hearing loss (the conductive block excludes ambient noise, paradoxically prolonging perceived BC). Reduced ABC is the SNHL pattern — it is very much applicable and diagnostically useful in sensorineural hearing loss.

Correct. Tympanoplasty-specific material risks include: failure of graft uptake (need for revision surgery), worsening of hearing (conductive → mixed or SNHL from ossicular trauma/cochlear damage), facial nerve palsy (runs through the middle ear and is at risk with mastoid surgery), tinnitus, dizziness, and infection. These are disclosed because they directly affect the patient's decision to proceed.

Informed consent for tympanoplasty must cover material risks including: graft failure (and need for revision), potential hearing worsening (SNHL from cochlear trauma), facial nerve injury (though rare), post-operative infection, and the possibility of persistent perforation. These are the risks a reasonable patient would want to know.

Suture material brand, anaesthesiologist's CV, and theatre staffing are not material to the patient's informed consent decision. The legal requirement is disclosure of risks that a reasonable patient would consider significant in deciding whether to consent to the procedure.