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Comparative > Equine Paranasal Sinuses (25) > Flashcards

Equine Paranasal Sinuses (25) Flashcards

Dr. Pimentel

1
Q

Label 1-3

A
  1. guttural pouch
  2. middle nasal conchae
  3. ventral nasal meatus
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2
Q

Label 8, 9, 10, & 7

A
  1. dorsal nasal meatus
  2. middle nasal meatus
  3. ventral nasal meatus

7: common nasal meatus

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3
Q

What are paranasal sinuses?

A

paired air-filled spaces within the bones of the skull

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4
Q

What are the horse paranasal sinuses?

A

frontal (conchofrontal)

maxillary

conchal (dorsal, middle, and ventral)

sphenopalatine

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5
Q

Which paranasal sinus normally fuses with the frontal sinus?

A

conchal paranasal sinuses (dorsal, middle, and ventral)

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6
Q

What is the frontal sinus also called?

A

conchofrontal

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7
Q

Where is the frontal sinus located?

A

midway between the infraorbital foramen and the medial canthus to the level of the caudal margins of the orbits

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8
Q

What does the frontal sinus communicate with?

A

the dorsal conchal sinus

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9
Q

The frontal sinus also communicates with the ______ via the _______ opening

A

caudal maxillary sinus

via frontomaxillary opening

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10
Q

What fuses to make the conchofrontal sinus?

A

frontal sinus

dorsal conchal sinus

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11
Q

Label 1-2

A
  1. dorsal conchal sinus
  2. frontal sinus
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12
Q

What is this? What is its function?

A

frontomaxillary aperture

means for the frontal sinus and caudal maxillary sinus to communicate

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13
Q

What is this?

A

conchofrontal sinus outline

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14
Q

Label 1-5

A
  1. conchofrontal sinus
  2. caudal maxillary sinus
  3. maxillary sinus septum
  4. rostral maxillary sinus
  5. infraorbital foramen
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15
Q

What is the yellow arrow pointing to?

A

maxillary sinus

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16
Q

What is the position of the maxillary sinus?

A

dorsal to facial crest

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17
Q

What are the divisions of the maxillary sinus?

A

rostral maxillary sinus

caudal maxillary sinus

18
Q

How is the maxillary sinus separated ventrally?

A

divided into medial and lateral subdivisions by the bony strut supporting the infraorbital canal

19
Q

What sinus is the surgeon opening into?

A

maxillary sinus

20
Q

What does the caudal maxillary sinus communicate with? Via what?

A

communicates with frontal sinus via the frontomaxillary opening (aperture)

communicates with sphenopalatine sinus and middle conchal sinus

21
Q

What does the rostral maxillary sinus communicate with?

A

ventral conchal sinus - medially

22
Q

The RMS and CMS share a slit-like opening into the ________ called the ________

A

middle nasal meatus

nasomaxillary aperture / opening

23
Q

The [dorsal/middle/ventral] nasal meatus communicates with the maxillary sinus via the nasomaxillary aperture

A

middle

24
Q

What is this?

A

middle nasal meatus

25
Q

T/F: #5 is pointing to the dorsal conchal sinus

A

FALSE - this is the dorsal nasal meatus

2 is the dorsal conchal sinus

26
Q

What is the middle conchal sinus?

A

small sinus within the middle nasal concha or greater ethmoturbinate

27
Q

Label 1-2

A
  1. middle conchal sinus
  2. maxillary sinus
28
Q

Label 1-4

A
  1. dorsal conchal sinus
  2. sphenopalatine sinus
  3. ventral conchal sinus
  4. frontal sinus
29
Q

The middle conchal sinus opens into the _______

A

caudal maxillary sinus

30
Q

Label 1-3

A
  1. dorsal conchal sinus
  2. frontal sinus
  3. middle conchal sinus
31
Q

What is the sphenopalatine sinus?

A

small sinus caudal to ethmoidal labyrinth

32
Q

What does the sphenopalatine sinus communicate with?

A

caudal maxillary sinus

33
Q

The sinuses are lined with what type of epithelium?

A

pseudostratified ciliated columnar epithelium

34
Q

How is equine sinus drainage unique?

A

the frontal sinus drains indirectly into the nasal passageway

35
Q

Regarding sinus drainage, all drainage occurs through the _______ into the ________

A

nasomaxillary opening (the slit-like opening the rostral and caudal maxillary sinuses share into…)

the middle nasal meatus

36
Q

What are the sinonasal channels?

A

connect the rostral and caudal maxillary sinuses with the nasomaxillary aperture in the caudal portion of the middle nasal meatus

37
Q

What are the yellow arrows pointing to?

A

sinonasal channels

38
Q

The sinonasal channels connect the _________ with the ________ in the ________

A

rostral/caudal maxillary sinuses

nasomaxillary aperture

middle nasal meatus

39
Q

What is this?

A

sinonasal channels

40
Q

What is trephination / bone flaps?

A

open sinus from outside and take out fluid

41
Q

What are the landmarks for entering the maxillary sinus for trephination / bone flaps? What specific part will you enter?

A

use medial canthus of eye &
rostral part of facial crest

will enter the caudal part of maxillary sinus

42
Q

What are the landmarks for entering the frontal sinus for trephination / bone flaps?

A

use midline &
medial canthus

will enter frontal sinus

Comparative (37 decks)

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