ENT Flashcards
What is vertigo?
Hallucination of movement (caused by problem with vestibular system)
What are some central causes of vertigo?
Stroke
Migraine
Neoplasms
Demylination e.g. MS
Drugs
What are some peripheral causes of vertigo?
BPPV
Menieres disease
Vestibular Neuronitis
How does benign paroxysmal positional vertigo present?
What causes it?
Vertigo associated with head movements lasts seconds
Caused by otoliths (crystals) in the semicircular canals (most commonly posterior) causing abnormal stigmatise of the hair cells
How is BPPV diagnosed and how is it treated?
Diagnosis = Dix-Hallpike
Treatment = Epley manoeuvre
What are the clinical features of Ménière’s disease?
What is the pathophysiology?
Tinnitus in affected ear
Episodic vertigo lasting minutes to hours associated with N&V
Fluctuating hearing loss
Aural fullness
(over time the disease burns out with no more vertigo but some reduced hearing - due to increased pressure and dilatation of endolymphatic system)
Caused by increased fluid in the endolymphatic compartment (endolymphatic hydrops)
What is the management of Ménière’s disease?
Dietary - reduce salt, chocolate, caffeine and Chinese food
Medical - thiazide diuretics, prochlorperazine for acute attacks (vestibular sedatives)
Surgical - grommet insertion
PREVENTION = betahistine and vestibular rehab exercises
How does vestibular neuronitis present?
Incapacitating vertigo lasting several days associated with N&V (after recent viral infection)
No hearing loss
Horizontal nystagmus
(Think in young fit patient)
How is vestibular neuronitis managed?
Vestibular sedatives during acute attacks (may still have long term vertibular deficits but don’t take vestibular suppressants as it delays recovery)
Resolves eventually - vestibular rehab exercises if chronic
How does viral labyrinthitis present?
Recent viral infection
N&V
Hearing loss (unlike vestibular neuronitis - hearing is in tact)
Sudden onset
How does vertibrobasilar ischaemia present?
Elderly
Dizziness on extension of neck
How does acoustic neuroma present?
Hearing loss, vertigo, tinnitus
Absent corneal reflex is important sign
Associated with neurofibromatosis type 2
What can happen to the external ear?
How is it treated?
Lacerations = primary closure with exposed cartilage covered with skin
Haematoma (blood in between cartilage and perichondrium) = drainage and pressure dressing
Tympanic membrane perforation (causes pain and conductive hearing loss) = usually heals by itself (if not my 6 months then myringoplasty)
Haemotympanum (blood in middle ear - can be associated with temporal bone fracture) = treated conservatively
How does otitis externa present?
What organisms can cause it?
Painful discharging ear (inflamed ear canal)
Muffled hearing due to discharge
Pseudomonas aeruginosa/ staph aureas
What is malignant otitis externa?
Seen in diabetics / immunecompromised
Infection spreads from soft tissue into bone
Presentation = chronic ear discharge despite treatment, deep seated severe ear pain and cranial nerve palsies
what is the management of otitis externa?
What are the risk factors?
Topical eardrops
Swab discharge in resistant cases
Microsuction of pus allowing drops to get to infection
If severe then wick can hold canal open
Malignant otitis externa = IV abx and topical treatment
Risk factors = cotton buds, swimming, humidity, immunocompromised
What is the epithelium lining the middle ear?
Respiratory epithelium (pseudostratified columnar)
What are the features of otitis media?
Ear pain (caused by increased pressure in tympanic cavity)
Discharge (pain may settle as tympanic membrane ruptures)
Fever
What is the management of otitis media?
What are the complications of AOM?
Conservative with analgesia
Medical if severe / persistent
Surgery - if recurrent may benefit from grommet
Complications = meningitis, intracranial abscess, sigmoid sinus thrombosis, bacterial labyrinthitis, facial paralysis
What are the two types of chronic otitis media?
Active / inactive (if discharging)
Then subdivided into mucosal or squamous disease
What is active squamous chronic otitis media also known as?
Cholesteatoma
How does inactive squamous COM act?
Retraction pocket which may develop in to active disease (cholesteatoma)
What is active mucosal COM?
What is inactive mucosal COM?
Active = chronic discharge from middle ear through tympanic membrane perforation
Inactive = tympanic membrane perforation but no active infection / discharge
How does mucosal COM develop?
Acute episode of AOM - after rupturing of tympanic membrane there is failure to heal
How is squamous COM thought to develop?
When keratinised squamous cells are introduced to middle ear from perforation
How does active COM present?
Chronic ear discharge and often conductive hearing loss
What is the management of COM?
Cholesteatoma = surgery
If no cholesteatoma = topical antibiotic drops and aural toilet
What is the risk with mastoid surgery?
Facial nerve palsy
Alteral taste (damage to chorda tympani)
Tinnitus
Vertigo
Complete loss of hearing
What is otitis media with effusion (glue ear)?
Fluid in middle ear associated with eustacian tube dysfunction (post nasal tumours can also cause glue ear)
OME is not painful but can become infected and become AOM
What are the clinical features of glue ear?
Middle ear effusion on otoscopy
Conductive hearing loss (associated with speech delay)
What are the investigations for glue ear?
Typanogram (flat type B tracing with normal canal volumn)
Pure tone audiogram (showing conductive hearing loss)
What is the management of glue ear?
Conservative (usually settles in 3 months)
Heading aid
Surgery - for prolonged hearing loss causing significant problems with Grommets (ventilation tubes) +/- adenoidectomy
What are the examination findings of otosclerosis?
Typically normal
Rarely pink hue to the tympanic membrane - Schwartze’s sign
What are the investigations for otosclerosis?
Typanogram (normal type A trace)
Pure tone audiogram (conductive hearing loss, carhart notch at 2kHz)
What is the management of otosclerosis?
Conservative - hearing loss
Surgery - stapedectomy
Where is the inner ear found?
Petrous part of temporal bone
What are the investigations for sudden onset sensorineural hearing loss?
Confirm sensorineural with tuning forks
Pure tone audiogram
MRI scan (for lesions along central auditory pathway e.g. acoustic neuroma)
What is the management for sudden onset sensorineural hearing loss?
Steroids (normall oral but can be injected into middle ear)
Anti-virals
Other treatments e.g. hyperbaric oxygen, carbogen
How to perform tuning fork test?
With a 256 or 512 Hz tuning fork
Weber = placed on forehead, louder on right / left
Sensorineural = louder on opposite side
Conductive = louder on same side as hearing loss (conductive hearing loss with block out background noise)
Rinne = placed on mastoid (conducted to cochlear via temporal bone) then lateral ear
Sensorineural if air conduction is louder (normal)
Conductive if bone conduction is louder
How is a pure tone audiogram performed?
Hearing threshold assessed at various frequencies
Air conduction assessed with headphones
Bone conduction is assessed by playing tone through bone conductor over mastoid bone
what are the three possible results from a tympanogram?
Tympanogram = inserting a probe into external ear canal
Type A = peak centered on 0 daPa on x axis (normal)
Type B = flat tracing (middle ear effusion / perforation)
Type C = peak has negative pressure (eustacian tube dysfunction)
Label the following:
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What are some local and idiopathic causes of nosebleeds?
Local = idiopathic (85%), traumatic, foreign body, inflammatory e.g. rhinitis, neoplastic
Systemic = HTN, coagulopathies, vasculopathies
What is the management of epistaxis?
ABC (assess for shock )
First aid (pinch soft part of nose, head forward, spit out don’t swallow)
Examination (anterior / posterior bleed)?
Conservative management = cautery (silver nitrate / bipolar diathermy), topical adrenaline may help control bleeding before, nasal packing if cautery fails (anterior +/ posterior)
Surgical management = under GA ligate / embolise the following vessels (sphenopalatine, anterior ethmoid, external carotid (last resort)
What is a complication of epistaxis?
How can it be prevented?
Septal haematoma later causing erosion of septal cartilage and saddle nose deformity
Prevented = anterior rhinoscopy and palpation of bulging septum
When can nasal trauma occur?
Assault
Sports
RTA
What are some complications of nasal bone fractures?
Septal haematoma
CSF leak with associated skull base fracture (rare)
What is the management of nasal trauma?
ABC (epstaxis is normally self limiting)
Examine for septal haematoma
No X-ray required
If deviated then consider manipulation under anaesthetic within 2 weeks
Label the following:
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Label the following:
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Label the following:
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What is rhinosinusitis?
Inflammation of the nose and paranasal sinuses characterised by some of:
- Nasal blockage / obstruction / congestion
- Anterior or posterior nasal drip
- Facial pressure
- Reduction or loss of smell
AND
Endoscopic signs of polyps, micropurulent discharge, oedema in middle meatus OR CT changes e.g. mucosal changes within osteomeatal complex
What is the difference between acute and chronic rhinosinusitis?
Acute = <12 weeks, complete resolution of symptoms (viral / non viral)
Chronic = > 12 weeks (divided as with nasal polyps or without)
What causes viral ARS (common cold)?
Rhinovirus
Influenza virus with resolution of symptoms within 5 days
> 5 days = bacterial (strep pneumoniae, haemophilus influenzae, moraxella catarrhalis)
What is the management of acute rhinosinusitis?
Analgesia if required
Nasal decongestants
If longer then 5 days = topical nasal steroids and oral abx
Which factors predispose to chronic rhinosinusitis?
Allergy
Infections (e.g. with staph aureus and strep pneumonia)
Ciliary impairment e.g. in cystic fibrosis (nasal polyps present in 40% of patient with CF)
Anatomical abnormalities e.g. septal deviation and abnormal uncinate process
Immunocompromised
Aspirin hypersensitivity
Atmospheric irritants e.g. smoking, dust, fumes
Swimming / diving
What are the investigations for rhinosinusitis?
Skin prick testing if allergy suspected
CT sinuses (if surgery planned / atypical features in hx and exam / not got at diagnosis as large number of asymptomatic patients have changes in the sinuses on CT scanning)
What is the management of chronic rhinosinusitis?
Conservative = avoidance of allergens, nasal douching
Medical = antihistamines, topical nasal steroids, oral steroids (1 week) in severe cases, oral abx
Surgical = nasal polypectomy, functional endoscopic sinus surgery to improve ventilation, septoplasty
Generally no cure and treatment aims are symptom improvement
What type of hypersensitivity reaction is allergic rhinitis?
Which allergens are associated?
IgE mediated type 1 (strongly associated with asthma)
Seasonal = hayfever
Perennial
Allergens = pollens, moulds, house dust mites and animal epithelia
What are the investigations for allergic rhinitis?
Skin prick tests for specific allergens
RAST blood test (if SPT not possible)
What is the treatment of allergic rhinitis?
Conservative = allergen avoidance, nasal douching
Medical = antihistamines, topical nasal steroids
Immunotherapy
How does orbital abscess develop?
How does it present?
What is the treatment?
Direct spread of pus from the ethmoid sinus / thrombophlebitis of mucosal vessels
Presentation = pain, oedema of eyelids, proposed eye and reduced eye movements (risk of blindness)
Treatment = diagnosis with CT, IV abx, nasal decongestants, urgent surgical drainage of abscess
What are the borders of the anterior and posterior triangles of the neck?
Anterior = midline of neck, anterior border of SCM, lower border of mandible
Posterior = posterior border of SCM, anterior edge of trapezius, middle third of clavicle
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Where does a retropharyngeal abscess occur?
Anterior to the prevertebral fascia and behind the pharynx (retropharyngeal space - extends to mediastinum)
What are the features of retropharyngeal abscess?
Common in young children (after a URTI)
Ridgid neck - reluctance to move
Systemically unwell
Airway compromise
Dysphagia / odynophagia
Widening of retropharyngeal space on lateral X-ray
What are the investigations for a retropharyngeal abscess?
CT neck
What is the management of a retropharyngeal abscess?
Secure airway if concerned
IV abx
Surgery (incision and drainage)
What is Ludwig’s Angina?
Infection of space between floor of mouth and mylohyoid (associated with dental infections)
What are the features of Ludwig’s Angina?
Swelling of floor of mouth
Painful mouth
Protruding tongue
Airway compromise
Drooling
What are the investigations for Ludwig’s Angina?
CT neck
OPG
What is the management of Ludwig’s angina?
Secure airway if concerns
IV abx
Surgery to drain any collection
Where do parapharyngeal absecesses occur?
What does this space contain?
How does it present?
Posterior-lateral to oropharynx and nasopharynx (divided by styloid process)
Contains carotid sheath
Presents as quinsy = febrile illness, odynophagia, trismus, reduced neck movement, swelling of neck around upper part of SCM
What is the cause of epiglottitis?
Haemophilus influenzae (incidence had reduced with vaccine)
Seen in 2-6 year olds
How does epiglottis present?
Stridor
Drooling
Pyrexia
What is the management of epiglottitis?
Secure airway (do not examine as this can precipitate obstruction)
IV abx (after a couple of days extubate)
What are the four areas of the pharynx and oral cavity?
Oral cavity = from lips to posterior soft palate
Nasopharynx = from base of skull down to soft palate (contains adenoids and eustacian tube opening)
Oropharynx = from soft palate down to superior border of epiglottitis (contains palatine tonsils, anterior and posterior tonsillar pillars)
Hypopharynx = from superior border of epiglottitis down to inferior border of cricoid cartilage
What are the muscles of the pharynx?
4 circular muscles (no longitudinal, unlike rest of GI tract)
Superior, middle and inferior constrictors and cricopharyngeus
Where do pharyngeal pouches form?
How do they present?
Killian’s dehiscence (between inferior constrictors and cricopharyngeus)
Presentation = dysphagia, delayed regurgitation of food, recurrent chest infections from aspirated food
Which muscles cause elevation and depression of pharynx?
Stylopharyngeus
Salpingopharyngeus
Palatopharyngeus
What is obstructive sleep apnoea? What are the common causes?
Complete obstruction of airway which requires patient to wake at night to alter position to open airway
Children = adenotonsillar hypertrophy
Adults = obesity
What are the investigations for obstructive sleep apnoea?
BMI
TFTs (hypothyroidism)
CXR (obstructive lung disease)?
ECG (right ventricular failure)?
Sleep study
What is the treatment of OSA?
Weight loss
CPAP (mainstay of treatment)
Mandibular positioning devices
Surgery (adenotonsillectomy in children)
Which organisms can cause tonsillitis?
Bacterial = beta-haemoloytic strep, staphylococci, strep. pneumoniae
Viral = rhinovirus, adenovirus, Enterovirus
What are the clinical features of tonsillitis?
Pyrexia
Dysphagia
Lymphadenopathy
Odynophagia
Trismus
Swollen tonsils (with/without exudates)
Otalgia (referred pain)
What is the management of tonsillitis?
Analgesia
Antibiotics
Drainage of peritonsillar abscess
Tonsillectomy for recurrent
What treatment should be avoided in tonsillitis?
What is the advice for patients with EBV?
Avoid amoxicillin as causes maculopapular rash in presence of EBV
EBV = avoid contact sports due to hepatosplenomegaly
How do head and neck cancers present (excluding thyroid and salivary gland)?
Dysphonia (especially laryngeal = hoarseness)
Dysphagia
Dyspnoea - stridor from narrowing of airway
Neck mass
Pain from site of pathology
Nasal blockage / unilateral middle ear effusion = nasopharyngeal pathology
What type of cancer is HNC?
Squamous cell carcinoma
Who is typically affected by HNC?
Men (twice as likely)
What are the risks factors for HNC?
Alcohol
Tobacco
Beetle nut chewing (oral cavity malignancy)
Chinese ethnic origin for nasopharyngeal malignancy
How to investigate primary tumour site in H&N cancers?
Examine under anaesthetic: panendoscopy - for biopsy (histological diagnosis, tumour size and second primary)
CT neck
How to investigate neck metastasis in H&N cancers?
US guided FNA (open biopsy can cause seeding of tumour - more useful for TB and lymphoma)
How to look for distant mets in H&N cancers?
CT chest
What are the management options for H&N cancers?
Palliation = reduce suffering / prolong life
Curative = RT / surgery (e.g. laryngectomy / neck dissection)
Why do enlarged thyroid glands need investigating?
Hyperthyroidism (hyper functioning)
Neoplasm
Compression of airway
What is the arterial supply to the thyroid?
Superior and inferior thyroid arteries
What nerve is at risk during thyroid surgery?
Recurrent laryngeal nerves (supply muscles of larynx apart from cricothyroid and sensation below vocal cords)
Damage = hoarseness
What are the investigations for an enlarged thyroid?
TFTs
US guided FNA (if diagnostic doubt then hemithyroidectomy)
What are the possible histopathologies for enlarged thyroid?
Non-neoplastic = single nodule (colloid / cystic) or multinodular
Neoplasm = adenoma (benign), malignant (papillary adenoma / follicular carcinoma / etc.)
What are the treatment options for enlarged thyroid glands?
Non-neoplastic = conservative, surgery (hemithyroidectomy to prevent need for thyroxine)
Neoplastic = adenomas (no treatment after diagnostic hemithyroidectomy) or surgery
What are some complications for thyroid surgery?
Post op haemorrhage
Airway obstruction (due to haemorrhage / bilateral vocal cord palsy)
Vocal cord palsy
Hypocalcaemia
Name the salivary glands?
Parotid
Submandibular
Sublingual
What is a risk of parotid gland surgery?
Facial nerve palsy
In which salivary glands are infection more common?
Submandibular gland
Which infections can cause sialadenitis (infection of salivary gland)?
How does it present?
Viral = mumps, coxsackievirus, HIV
Bacterial = staphylococcal
Seen in dehydrated / immunocompromised
Present = foul taste and signs of infection
What are investigations for sialolithiasis?
Ultrasound / sialogram (causes pain which is worse during meals)
What is the management of sialolithiasis?
Conservative (most settle, analgesia, hydration)
Radiological removal
Surgery = removal of stones / salivary gland
What are the complications of sialolithiasis?
Sialadenitis
Abscess formation
How do differentiate thyroglossal cyst / goitre?
Cyst = moves up on tongue protrusion
Nodule = up on swallowing
What is the course of the recurrent laryngeal nerve on the left and right?
Left = loops under aortic arch
Right = under right subclavian artery
What would suggest low calcium?
Tingling around mouth and fingertips
If severe = muscle spasms
What are the features of nasal polyps?
Nasal obstruction
Rhinorrhoea
Poor taste
What are some associations of nasal polyps?
Asthma
Aspirin sensitivity
Infective sinusitis
CF
What is the management of nasal polyps?
Topical steroids
What is Ramsay Hunt syndrome?
Herpes Zoster oticus - reactivation of varicella zoster virus in geniculate ganglion of 7th CN
What are the features of Ramsay Hunt syndrome?
Auricular pain
Facial nerve palsy
Vesicular rash around ear
Vertigo and tinnitus
What is the management of Ramsay-Hunt syndrome?
Oral aciclovir and corticosteroids
How does a branchial cyst present?
Mobile and cystic near SCM and pharynx (presents in early adulthood)
When is a myringoplasty performed?
To repair a perforated tympanic membrane if it hasn’t repaired after 6-8 weeks
What is chronic rhinosinusitis?
Inflammation of paranasal sinuses lasting 12 weeks or longer
Which factors predispose to chronic rhinosinusitis?
Atopy
Septal deviation
Swimming
Smoking
What are the features of chronic rhinosinusitis?
Facial pain - worse on bending forward
nasal discharge
nasal blocking - mouth breathing
post nasal drip - chronic cough
What is the management of chronic rhinosinusitis?
Avoid allergen
Intranasal corticosteroids
Nasal irrigation with saline solution
Which drugs can cause gingival hyperplasia?
Phenytoin
Cyclosporin
CCB (nifedipine)
What are the causes of facial pain and how do they present?
Sinusitis = facial fullness, nasal discharge, pyrexia, post-nasal drip and cough
Trigeminal neuralgia = unilateral, shooting facial pain, triggered by light touch
Cluster headache = pain twice a day up to 2 hrs, up to 12 weeks, worse in one eye
Temporal arteritis = tender around temples, raised ESR
What are some causes of tinnitus?
Ménière’s disease = hearing loss, vertigo, fullness
Otosclerosis = 20-40 years
Sudden onset sensorineural = (normally acoustic neuroma - hearing loss, vertigo, tinnitus, associated with neurofibromatosis)
Drugs = quinine, aspirin/NSAIDs, loop diuretics
What is the treatment for sudden SN hearing loss?
Oral prednisolone 7 days
When to suspect mumps?
Bilateral painful parotid enlargement
Orchitis
Pancreatitis
Reduced hearing
Meningoencephalitis