The Nose Flashcards

1
Q

What are the 4 functions of the nose and nasal cavity?

A

Smell- olfaction (olfactory much out membrane),
Route for inspired air,
Filters, warms and moistens inspired air (resp, mucous membrane),
Resonating chamber for speech.

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2
Q

Where does the ET open? What is the floor of the nasal cavity? What is the vestibule lined with?

A

Nasopharynx, hard and soft palate,

skin, sebaceous glands and hair

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3
Q

What is the external nose made of? Where do you apply pressure to a nose bleed?

A

Nasal bone (root) an cartilage (bridge)- apply pressure to the bridge

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4
Q

What is the most commonly fractured bone in the face?

A

Nasal bone

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5
Q

What are the boundaries of the nasal cavity?

A
Roof= frontal, nasal, sphenoid, crista galli on cribiform plate.
Floor= hard (maxilla and palatine) and soft palate.
Lat= maxilla, turbinates.
Med= nasal septum= nasal cartilage, vomer, perpendicular plate of ethmoid
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6
Q

What is a septal haematoma? How do you treat? Common/rare?

A

Cartilaginous part of septum gets blood from overlying perichondrium. Trauma -> buckling of septum and shearing of vessels.
Refer to ENT. Blood accumulates between perichondrium and cartilage.
Drain + aspirate blood, pack perichondrium against septum
Quite rare.

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7
Q

What can an untreated septal haematoma lead to?

A

Saddle nose deformity of dorsum of nose- avascular necrosis of septum. Infection can also collect in haematoma increasing change of necrosis

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8
Q

What are 2 functions of conchae?

A

Slow air flow,

Increase s.a for air to pass over

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9
Q

What type of epithelia in resp mucous membrane? What are its 3 functions?

A

Pseudostratified ciliated columnar.

Warms, humidifies and filters air.

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10
Q

Where does the nasal cavity receive drainage from?

A

Paranasal sinuses and nasolacrimal duct

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11
Q

General sensation to the nasal cavity…

A

Trigeminal

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12
Q

What is a nasal polyp? Uni/bilateral? What do they look like? Age?

A

Fleshy, benign swelling arising from nasal mucosa. Usually bilateral. Pale/yellow or fleshy and reddened.
>40 yrs

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13
Q

What are the symptoms of nasal polyps? How are unilateral treated? How do you treat polyps?

A

Blocked nose and watery rhinorrhoea, post nasal drip, deceased smell and tastes.
Unilateral +/- blood stains, treated as cancer until proven otherwise.
Treat polyps with nasal spray

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14
Q

C.f turbinate, how do polyps feel?

A

Mobile, not painful

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15
Q

What is rhinitis? Symptoms? Causes?

A

Inflam of nasal mucosa.
Nasal congestion, rhionrrhea, sneezing, nasal irrigation, post nasal drip.
Acute nfective rhinitis(common cold), allergic rhinitis

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16
Q

What is the blood supply to the nose? Why is it rich? Anastomoses where?

A
Via opthalmic (ant and post ethmoid) and maxillary (sphenopalatine) arteries. Rich to warm and humidify air. 
Anastomoses at Kiesselbach's area
17
Q

What is the venous drainage of the nose?

A

Into cavernous sinus, facial vein and pterygoid plexus.

18
Q

Where is the most common source of epistaxis? Where less common?

A
Opthalmic artery (ant and post ethmoid) from Kiesselbach's area.
5% from spehoplaltine. Harder to treat
19
Q

What are the paranasal sinuses? Are they present from birth? Which epithelia?

A

Air filled spaces- extensions of the nasal cavity. Rudimentary at birth.
Resp ciliated mucus producing epithelia

20
Q

What do the paranasal sinuses do? Where do they drain? Which most commonly effected in infections?

A

Help humidify and warm air, decrease weight of skull.
Drain into nasal cavity via Ostia.
Maxillary= sinusitis

21
Q

What are the important anatomical relationships of sinuses?

A

Roots of upper teeth into maxillary, orbit (lacrimal and conjunctiva), ant cranial fossa (frontal sinus and ethmoid air cells)

22
Q

What is acute sinusitis? Symptoms? What two things make it more likely?

A

Acute inflam of lining of sinuses lasting less than 4 weeks, often secondary to cold.
Non resolving cold/flu symptoms, pyrexia, rhinorrhea, headache/facial pain worse on leaning forward.
Plugs/deviated septum increase risk

23
Q

How do you treat acute sinusitis? What bacteria may breed?

A

Usually self limiting- symptomatic. Antibiotics for sever/prolonged.
Reduced ciliary functions, reduced drainage, mucous is breeding site for strep or haemophillus

24
Q

What nerve supplies ant portion of nasal cavity and most paranasal sinuses?

25
Q

What nerve supplies post nasal cavity? +which sinus?

A

Maxillary + maxillary sinus

26
Q

What is contained in Waldeyer’s Ring?

A

Palatine tonsils x2,
Adenoids,
Lingual tonsils,
Tubal tonsils x2

27
Q

What is Waldeyer’s Ring?

A

Ring of lymphoid tissue surrounding naso and oropharynx. 1st line of defence against microbes from nasal and oral routes