Ear, Nose And Sinuses Flashcards
The endolymph is similar to intercellular fluid because
Has a high concentration of potassium
The perilymph is similar to the CSF because
Has a high concentration of sodium
The Nerve supply of external ear is
Auriculotemporal branch of trigeminal nerve, the greater auricular nerve, the lesser occipital nerve and cranial nerve 7,9 and 10
The nerve supply of middle ear is
CN IX
The organism causing otitis externa are
Pseudomonas, Staphylococcus, candida and aspergillus
The causative agent of necrotising otitis externa
Pseudomonas aeruginosa
What is the most common infecting organism of acute otitis media?
Streptococcus pneumonia and haemophilus influenzae
What is the most common complication of acute otitis media?
Mastoiditis because the mastoid air cell connect freely with the middle ear space
What is the most common middle ear tumour?
Glomus tumour
What are the ototoxic drugs?
💊Antibiotics such as aminoglycosides vancomycin erythromycin
💊loop diuretic such as furosemide
💊chemotherapy agents as cisplatin and carboplatin
💊Salicylate such as aspirin and quinine
What is Bell’s palsy ?
Unilateral lower motor facial nerve palsy
How much percent of all facial palsies are due to Bell’s palsy and what is the probably causative agent?
75%, Herpes simplex virus infection
A patient having pain and the appearances of vesicles on the tympanic membrane ear canal Pina or inside of the cheek he also has facial paralysis. It is also accompanied by vertigo and sensory neural hearing loss. What is the diagnosis?
Ramsey Hunt syndrome
What is the name of the plexus of vessel on the anterior part of the nasal septum?
Kiesselbach’s plexus which is formed by greater Palatine artery ,spheno Palatine artery, anterior ethmoidal artery , posterior ethmoidal artery and facial artery.
What type of nasal polyp indicates malignancy?
Bleeding polyp
The most common malignant tumour to occur within the nasal cavity and paranasal sinuses are
Squamous cell carcinoma
A person is exposed to hardwood dust in the furniture industry what type of carcinoma he may have in the nasal cavity and paranasal sinuses?
Adenocarcinoma
