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Radioiodine (I-131) Referral Checklist for Veterinarians
To provide the best medical service possible to pets with feline hyperthyroidism and their owners, we require a preliminary work-up on each patient prior to treatment. A clear picture of the overall health of each cat is critical in determining if it is an appropriate candidate for the treatment.
Here's What We Need
- Laboratory blood tests (CBC, chemistry profile and T4 results) within 4 weeks prior to I-131 treatment
- Urinalysis within 4 weeks prior to I-131 treatment
- Thoracic radiographs (Lateral and VD) within 4 weeks prior to I-131 treatment
- Echocardiogram (this can be performed within 4 weeks prior to I-131 treatment or done at NorthStar VETS on the day of treatment)
- Cats must be off thyroid medication (tapazole, methimazole) for at least 14 days prior to I-131 treatment and a T4 must be done (after being off medication for 10 to 14 days) to ensure proper dosing of I-131.
- If a cat has begun thyroid medication, please repeat the blood work and USG prior to discontinuing the medication (to ensure they are not azotemic or isosthenuric when they are euthyroid)
- The New Jersey Department of Environmental Protection allows us to release cats treated with I-131 therapy 72 hours post-treatment provided their radiation levels measure low enough (0.5 mr/hr or below). Some cats may require an additional 24 hours of hospitalization to allow radiation levels to dissipate.
- Please advise your clients to call and speak with one of our Internal Medicine technicians to schedule an appointment and obtain an estimate for treatment
- Please fax all records and email radiographs (if possible)
- Clients may also bring records and radiographs if faxing and emailing are not an option
Please call us with any questions at 609.259.8300.