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2MB ENT (The Directors Cut) > Nose Anatomy > Flashcards

Nose Anatomy Flashcards

1
Q

roof of nasal cavity

A

cribiform plate + crista galli

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2
Q

lateral wall of nasal cavity

A

superior and middle conchae, ethmoidal are cells, orbital plate of ethmoid

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3
Q

septum of nasal cavity

A

perpendicular plate of ethmoid + vomer

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4
Q

disrupting cribiform plate of ethmoid bone can cause ….

A

danger of infection spreading from nasal cavity to anterior cranial fossa. Le Fort II + III

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5
Q

mucosa of entry to nose

A

keratinised stratified squamous epithelium

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6
Q

mucosa of most of nasal cavity

A

respiratory epithelium

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7
Q

mucosa of top of nasal cavity

A

olfactory mucosa

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8
Q

landmarks of olfactory nerve (CNI)

A

Bulb, Tract (ends in temporal lobe), passes through cribiform plate of ethmoid bone.

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9
Q

Somatic nerve supply to nasal cavity…

A

Opthalmic (CN V1) anterosuperiorly

Maxillary (CNV2) posteroinferiorly

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10
Q

blood supply?

A

External and internal carotids

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11
Q

External carotids?

A

Facial and maxillary

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12
Q

Internal?

A

Opthalmic

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13
Q

Arterial anastomosis on the nasal septum

A

Kiesselbach’s Area (a common site of epistaxis [nosebleed])

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14
Q

Meatus

A

Space under each concha

superior, middle, inferior

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15
Q

How to confirm placement of NG tube

A

Xray
NG tube midline down to diaphragm
NG tube clearly visible
Tip should be 10 cm beyond GOJ

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16
Q

What filters the air?

A

Vibrissae (small hairs)

17
Q

Mucous drains into nasal cavities from the sinuses via…

A

ostia (lateral walls)

18
Q

frontal sinus drains to..

A

middle meatus

19
Q

ethmoidal cells drains to …

A

superior and middle meatuses

20
Q

sphenoidal sinus drains to …

A

sphenoethmoidal recess

21
Q

Maxillary sinus drains to…

A

middle meatus

22
Q

Nasolacrimal duct

A

inferior meatus

23
Q

Paranasal sinuses lined by..

A

mucous-secreting resp mucosa

24
Q

The problem with maxillary sinusitis …

A

Ostia sits superiorly so drains against gravity

25
Q

extraction of tooth may cause…

A

oro-antral fistula

26
Q

Why maxillary sinusitis may present as toothache

A

common sensory nerve supply from CNV (referred pain)

2MB ENT (The Directors Cut) (16 decks)

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