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17 Cards in this Set
- Front
- Back
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Name the paranasal sinuses of the horse
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Conchofrontal sinus
Maxillary sinus Sphenopalatine sinus Ethmoidal (middle conchal) sinus Ventral conchal sinus |
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What are the divisions of the Conchofrontal sinus?
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Frontal sinus
Dorsal conchal sinus |
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What are the divisions of the maxillary sinus?
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Rostral and caudal maxillary sinuses
(caudal has medial and lateral compartments) |
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What are the divisions of the sphenopalatine sinus?
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None that we learned!
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What are the rostral and caudal borders of the frontal sinus? The lateral borders?
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From TMJ to rostral margin of orbit.
Lateral to zygomatic process of frontal bone. |
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ID these sinuses
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A - Conchofrontal sinus
B - Caudal maxillary sinus C - Maxillary septum D - Rostral maxillary sinus |
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What are the SURGICAL boundaries of the conchofrontal sinus?
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Medial - 2cm lateral and parallel to midline
Caudal - Transverse plane through zygomatic process of frontal Rostral - Midpoint btw. rostral margin of orbit and infraorbital foramen |
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T or F:
The rostral and caudal maxillary sinuses do not directly communicate. |
True! They do communicate through the middle nasal meatus via the nasomaxillary opening
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T or F:
The medial compartment of the caudal maxillary sinus communicates with the frontal sinus via the frontomaxillary opening. |
False! The LATERAL compartment communicates with the frontal sinus
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Which sinuses open into the nasomaxillary opening?
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Middle nasal meatus
Rostral maxillary sinus Medial compartment of the caudal maxillary sinus Rostral maxillary sinus |
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What does the caudal maxillary sinus communicate with?
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Sphenopalatine sinus (medial)
Frontal sinus (lateral) Ethmoidal sinus (medial) Middle nasal meatus (medial) |
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Which sinus is the most clinically significant for horses? For ruminants?
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Maxillary sinus (horse)
Frontal sinus (ruminants) |
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What are the surgical boundaries of the maxillary sinus?
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Ventral - facial crest
Dorsal - line from infraorbital foramen parallel to facial crest Caudal - rostral orbit Rostral - from rostral end of facial crest to infraorbital foramen |
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Check out these ox sinuses
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A - Frontal sinus (caudal compartment)
B - Frontal sinus (Rostral component) C - Dorsal conchal sinus |
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Which bones are involved by the bovine frontal sinus?
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Frontal, Parietal, Occipital, and temporal bones
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Where do you trephine the frontal sinus in an ox?
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Just caudal to a transverse plane through the center of the orbits and approximately 1 ½ inches from midline. Need to avoid supraorbital vein
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Where do you trephine a cow's maxillary sinus? A calf?
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Just dorsal and caudal to facial tuberosity. One inch farther dorsally than previous site (due to cheek teeth roots)
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