WorksheetsLow-Dose Dexamethasone Suppression Test (LDDST)
Total questions: 7
Worksheet time: 4mins
What is the preferred first-line diagnostic test for canine hyperadrenocorticism (HAC)?
ACTH stimulation testmeasurement
Basal cortisol
Low-dose dexamethasone suppression test
UCCR
How comfortable do you feel performing the Low-Dose Dexamethasone Suppression Test (LDDST) in dogs?
Very confident — I calculate dexamethasone doses in my sleep
Confident — I know what I’m doing, but I still double-check the math
Somewhat confident — but LDDST still makes me nervous
Not confident — I Google “LDDST dose” every single time
How long does the Low-dose dexamethasone suppression test (LDDST) take to complete?
10 MIN
4 Hours
8 Hours
1 Hour
What is the correct dexamethasone dose for the LDDST in dogs?
0.001 mg/kg IV
1 mg/kg IV
0.1 mg/kg IV
0.01 mg/kg IV
What may happen if a high dose of dexamethasone is mistakenly used during an intended LDDST?
The test becomes more sensitive
The test becomes diagnostic for adrenal tumors
Cortisol suppression may occur even in dogs with HAC
The test results remain unaffected
Which dexamethasone formulation should be used for LDDST?
Oral dexamethasone
Long-acting dexamethasone acetate
Any formulation is acceptable
Dexamethasone sodium phosphate
This 10-kg dog DOES have hyperadrenocorticism (HAC). Which option will correctly confirm the diagnosis?
(All other options will result in a false-negative due to technical or protocol errors.)
LDDST (0.01 mg/kg IV) (DexSP) labeled 4 mg/mL =0.033 mL IV
LDDST (0.01 mg/kg IV) (dexamethasone acetate) 2mg/mL =0.025mL IV
LDDST (0.01 mg/kg IV) (dexamethasone acetate) 2mg/mL =0.05mL IV
HDDST (0.1 mg/kg IV) (dexamethasone sodium phosphate) 2mg/mL =0.33mL IV
