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35 Cards in this Set

  • Front
  • Back
Thyroid hormones have profound effects on ___? 4
1. metabolism
2. cardiac function
3. growth
4. development
Thyroid hormones stimulate the ____ of most cells and _____ of cardiac contraction.
stimulate the metabolic rate of most cells

and increase force of and rate of cardiac contraction
Name the 2 thyroid hormones and 1 characteristic each.
1. Triiodothryronine (T3)
-more potent than T4

2. Thyroxine (T4)
-is converted to T3 in most tissues
What are the 3 Thyroid Hormone actions
1. Stimulation of energy use
2. Stimulation of the heart
3. Promotion of growth and development
Name the 3 Thyroid test
1. Serum TSH
2. Serum T4 Test
3. Serum T3 Test
Which Thryoid test is the most sensitive method for diagnosing hypothryroidism?
Serum TSH
Which Thyroid test measures total thryroxine for monitoring, screening, and replacement therapy? (Confirms diagnosis)
Serum T4 Test
Which Thryoid test measures total triiodothyronine, and used for hyperthyroidism and monitoring therapy?
Serum T3 Test
What is Hypothyroidism?
Severe deficiency of thyroid hormone
-Myxedema (adults)
Name some of the clinical presentations (adults) of Hypothyroidism. 8
1. Pale, puffy, and expressionless face
2. Cold and Dry skin
3. Brittle hair or hair loss
4 HR and Temp lowered
5. Lethargy, intolerance to cold
6. May have mental impairment
7. May have enlarged thyroid gland
8. Associated with Hashimoto's disease (chronic autoimmune Thyroiditis)
1. Hypothyroidism lab values

2. Treatment with thyroid replacement is _____?
1. low serum T4 and high TSH


2. replacement is LIFELONG
1. Severe deficit of Thyroid hormone in children is called ___?

2. Name the Clinical presentation in children (3)
1. Cretinism

2. A. Mental Retardation
B. Derangement of growth (large protruding tongue, potbelly, dwarfish appearance)
C. Impairment in nervous system, bones, teeth, and muscles
What are the 2 major forms of Hypothyroidism?
1. Grave's disease (most common)

2. Toxic nodular goiter (Plummer's disease)
Name the 5 characteristics of Graves' disease.
1. More common in Females
2. Thyrotoxicosis (Thyroid Crisis)
3. Exophthalmoses (Bugged Eyed)
4. Rapid HR with possible dysrythmias

5. CNS effects: nervousness, rapid flow of speech, insomnia, muscle weakness,intolerance to heat, sweaty skin, and weight loss
Refer for _____ for Toxic Nodular Goiter (Plummer's Disease).
refer for surgery or radiaton
1. Thyrotoxicosis is also called _____ and _____ and exhibits ____ of thyroid hormones.

2. S/S of Thyrotoxicosis are : 3
1. Thyrotoxicosis is also called a Thyroid Crisis or a Thryoid Storm

2. Hyperthermia, Tachycardia, and profound weakness
1.What do you use Propanolol to treat in relation to Thyrotoxicosis?

2. Lab values of hyperthyroidism?

3. Caused by/
1. treatment of dysrythmias

2. Low TSH levels

3. Thyroid-stimulating immunoglobulins (TSIs)
What are the 3 areas of treatment for hyperthyroidism?
1. Surgical removal of thyroid tissue

2. Destruction of thyroid tissuewith radioactive iodine

3. Suppression of thyroid hormone synthesis with anti-thyroid drugs
What are some characteristics of the treatment: Destruction of thyroid tissue with radioactive iodine?
Destruction of thyroid tissue with radioactive iodine (potassium iodine or strong iodine solution) in cases of Thyroid Storm
-Suppresses thyroid hormone release
-May cause life-long Hypothyroidism
1. Levothyroxine (T4) [Synthroid] is a ____?

2. Conversion of Levothyroxine (T4)is to ____ with a half life of ____.
1. Thyroid Hormone prepartion.
Synthetic preparation of thyroxine (T4)

2. Conversion to T3, half-life is 7 days
1. Levothyroxine (T4) [Synthroid] is highly ____ bound and used for _____ forms of hypothyroidism.

2. Was previously used as:
1. highly protein bound, used for all forms of hypothyroidism

2.previously used as a weight loss agent
1. Adverse effects of Levothyroxine (T4) [Synthroid] are rare unless in _____.

2. S/S of Thyroid Toxicosis: 3
1. are rare unless in excess/overdose

2. A. Tachycardia
B. Angina
C. Tremors
Name the 5 drugs that reduce absorption of Levothyroxine (T4) [Synthroid]
1. Cholestyramine
2. Colestipol
3. Calcium Supplements
4. Aluminum antacids
5. Iron supplements (give 2 hours apart)
Name the 5 drugs that accerlate metabolism of Levothyroxine (T4) [Synthroid]
1. Phenytoin
2. Carbamazepine
3. Rifampin
4. Sertaline
5. Phenobarbital
1. What does Levothyroxine (T4) [Synthroid] do when used with Warfarin?

2. Catecholamines?
1. Synthroid accelerates the degradation of Vit K clotting factors inhancing the effects of Warfarin (TX- decrease Warfarin dosage)

2. Increases cardiac responsiveness to catecholamines
What does Propylthiouracil (PTU): Antithyroid Drug do?
Inhibits thyroid hormone synthesis by:
-preventing oxidation of iodine
-preventing iodinated tyrosine from coupling
1. What is the half life of Propylthiouracil (PTU?

2. What route is available?
1. short-about 75-120min

2. ONLY AVAILABLE ORALLY
What are the 3 theraputic uses of Propylthiouracil (PTU)?
1. Graves' disease
2. Adjunct to radiation therapy
3. Preparation for thyroid surgery
-thyrotoxic crisis
Adverse effects of Propylthiouracil (PTU): 4
1. Agranulocytosis (check WBC)
2. Hypothryroidism
3. Pregnancy and Lactation
4. Stop drug immediately if jaundice, fever/chills, sore throat, bleeding gums
What is Radioactive Iodine-131 (131I)?
Radioactive isotope of stable iodine; emmits gamma and beta rays
What is Radioactive Iodine-131 (131I)used in?
Grave's Disease
1. What is the effect of Radioactive Iodine-131 (131I) on Grave's disease?

2. Advantages?

3. Disadvantages?
1. Effect on the thyroid (destruction of thyroid tissue)

2. Advantages of (131I) therapy: low cost, less risk, less discomfort, no surgery or risk of death

3. Disadvantages (131I) delayed in effect and incidence of delayed hypothyroidism
1. What are Radioactive Iodine-131 (131I) candidates? 2

2. Action? 2
1. Patients over 30, Contraindicated in pregnancy and lactation

2. The drug is taken up by the thyroid gland and destroys the cells to reduce hyperthyroidism

2. Produces clinical remission of hyperthyroidism with destruction of thyroid gland
What is Nonradioactive Iodine?
1. Strong Iodine solution (Lugol's solution)
- used to suppress thyroid function in preparation for thyroidectomy?
What are the adverse affects of Nonradioactive Iodine? 7
1. Brassy tast
2. burning sensation in mouth and throat
3. Soreness of the teeth and gums
4. Frontal Headache
5. Coryza
6. Salivation
7. Varios skin eruptions