Gutteral Pouch Tympany Flashcards
T/F
Most guttural pouch tympanies are bilateral.
False
Most are unilateral
T/F
There is no such things s premature closure, only excessive drainage in terms of castration.
True
T/F
Monorchid horses are fairly common.
False
Very very very rare!
T/F
Up to 5% of horses will exhibit unwanted behavior after a proper castration.
False
Up to 25%
T/F
A rectovaginal fistula is similar to a 3rd degree perineal laceration.
False
T/F
Pelvic flexure impactions are seldom a location for surgical colic.
True
Pelvic flexure impactions are mostly medical colics
T/F
> 90% of horses are affected by laryngeal hemiplegia on the right side.
False
Left side
What is the guttural pouch?
Dilated eustachian tube
What is the etiology of guttural pouch tympany?
Unknown
Increased pressure in nasopharyngeal from coughing or infection
Possibly genetic
What is the volume of the guttural pouches in an adult horse?
300-500mL
How does pressure build in the guttural pouch?
Forced by coughing or neighing
What are the clinical signs of GP tympany?
Swelling of parotid region - unilateral
Respiratory noise
Nasal discharge
Dyspnea, pneumonia dysphagia
Are colts or fillies more likely to get GP tympany?
Fillies
How do you diagnose GP tympany?
Clinical signs
Endoscopy
Radiographs (air-filled GP)
Needle decompression
What are the borders of Viborg’s triangle?
- Angle of mandible
- Linguofacial vein
- Tendon of sternocephalicus
What is the goal of treatment for GP tympany?
Make the one-way valve incompetent
What are the surgical treatments for GP tympany?
- Septum fenustration
- Resection of inner mucosal flap of GP opening
- Modified Whitehouse (below linguofacial vein)
- Transendoscopic laser
What does LASER stand for?
Light amplification by stimulated emission of radiation
What are the two sides/lips of the inner valve of the GP opening?
Axial/medial - thick, cord-like pelican salpingopharyngeus
Abaxial/lateral - tensor lavator palatini muscle
What is the prognosis for GP tympany?
30% recurrence rate after first operation
Guarded prognosis if dysphagia and aspiration pneumonia present
