INVESTIGATIONS - ENT and ophthalmology Flashcards
What type of imaging is used to investigate conductive hearing loss?
CT
What type of imaging is used to investigate sensorineural hearing loss?
MRI
What’s the usual imaging method of choice to investigate trauma involving the orbit, midface and skull base?
CT
What method of imaging might be useful in trying to determine the cause of dizziness in a patient?
MRI
Apart from an audiogram, what investigation would be helpful in a patient with suspected cholesteatoma?
CT of the petrous temporal bone
Which tuning fork is used for Rinnes and Werbers?
512Hz
What manouvre is used to help diagnose BPPV?
Dix-Hallpike test
In a patient with allergic rhinitis, what test could be done to establish the causative allergen?
Skin prick testing or RAST (measure specific serum IgE levels)
Investigation of choice in suspected orbital cellulitis?
CT
Diagnostic test for infective mononucleosis / glandular fever?
What’s the CRP normally in mono?
Blood IgM EBV
CRP tends to be <100
When investigating a potential foreign body with x-ray, what should you always do?
Lateral view to establish location (i.e. oesophagus or trachea)
First line investigation for neck lumps?
Ultrasound
+ FNA for thyroid
Investigation of choice for salivary gland disease?
Ultrasound
What’s the imaging method of choice for looking at the paranasal sinuses?
CT
Imaging method of choice for pathologies involving the skull base?
MRI
Imaging method of choice for staging most head and neck cancer?
CT
Why is CT better than MRI in elderly / debilitated patients?
Much faster
Investigation of choice to assess oesopahgeal structure in a patient presenting with dysphagia?
Endoscopy
Investigation of choice to assess oesophageal function in a patient presenting with dysphagia?
Give examples of when this would be useful.
Barium swallow
Pharyngeal pouches, strictures, dysmotility
Are benign lymph nodes elliptical or round?
Ellipitcal (rugby ball shaped)
Imaging method of choice in nasal trauma?
No imaging needed!
