Endocrine Flashcards
What 3 hormones are secreted by the thyroid gland?
- Thyroxine (T4)
- Triiodothyronine (T3)
- Calcitonin
Thyroxine (T4) is converted to ______ peripherally
Triiodothyronine (T3)
The thyroid gland is responsible for ______
BMR
Are the following manifestations of hypothyroidism or hyperthyroidism?
- Bradycardia
- Constipation
- Weight gain
Hypothyroidism
What are the manifestations of hypothyroidism? (3)
- Facial edema
- Fatigue
- Intolerance to cold
Patients with hypothyroidism are lacking ______
T3 and T4
Describe the mechanism of action of synthroid (3)
- Increases metabolic rate –> converts T4 to T3
- Increases catecholamine sensitivity –> increases cardiac output
- Increases renal blood flow / GFR –> diuretic effect
What are the side effects of synthroid? (2)
- Diaphoresis
- Weight loss
What are the adverse effects of synthroid? (2)
- Osteoporosis
- Seizures
Tube feedings ______ absorption of synthroid
Decrease
Describe the nursing considerations of synthroid (2)
- Long half-life - single dose per day
- Stop tube feed before and after administration
Describe the administration of synthroid (3)
- In the morning
- 30 - 60 minutes prior to food
- With full glass of water
When does the maximum therapeutic effect of synthroid occur?
4 - 6 weeks
What are the routes of synthroid? (2)
- PO
- IV
IV synthroid is rarely used and should be ______ of oral dose
50%
Are the following manifestations of hypothyroidism or hyperthyroidism?
- Tachycardia
- Diarrhea
- Weight loss
Hyperthyroidism
What are the manifestations of hyperthyroidism? (4)
- Bulging eyes
- Facial flushing
- Finger clubbing
- Intolerance to heat
Describe the treatment of hyperthyroidism (3)
- Destruction of thyroid gland
- Thyroidectomy
- Antithyroid drugs
What are some examples of antithyroid drugs? (3)
- Tapazole
- PTU
- Iodine-131
Describe the mechanism of action of tapazole
Inhibits synthesis of T3 / T4
Tapazole cannot inactivate already formed ______
Thyroid hormone
What is the primary side effect of tapazole?
Agranulocytosis
Describe the nursing considerations of tapazole (2)
- Not safe during pregnancy / lactation
- Monitor CBC - pancytopenia (low platelets)
When does the maximum therapeutic effect of tapazole occur?
12 weeks
Describe the mechanism of action of PTU
Inhibits synthesis of T3 / T4
What is the primary concern of PTU?
Liver function