Nur 172 Exam 2 Questions and Correct Solutions

Nur 172 Exam 2 Questions and Correct Solutions What's theophylline therapeutic level? - Answer -5-15 ug/mL What is the mechanism of action of theophylline? - Answer -It inhibits phosphodiesterase which consequently relaxes smooth muscle in the bronchial airways and pulmonary blood vessel. This is used to treat breathing problems, not for flare ups. Thyroid Stimulating Hormone (TSH) Thyrotropin normal range? - Answer -0.3-5 uU/mL What is TSH (thyrotropin)? - Answer -Pituitary secretion is stimulated by hypothalamic thyroid releasing hormone (TRH). Low levels of T3 and T4 stimulate TSH. Used to monitor exogenous thyroid replacement or suppression What is the goal of thyroid replacement? - Answer -Provide an adequate amount of thyroid medication so that TSH secretion is in low-normal range, indicating euthyroid state What does an increased level of TSH indicate? - Answer -- Primary hypothyroidism - Thyroiditis - Congenital cretinism - Large doses of iodine - Surgical ablation of thyroid - Severe, chronic illnesses What does a decreased level of TSH indicate? - Answer -- Secondary hypothyroidism - Hyperthyroidism - Suppressive doses of thyroid medication - Factitious hyperthyroidism T3 normal range - Answer -40-180 ng/dL T4 normal range - Answer -- Male: 4-12 mcg/dL - Female: 5-12 mcg/dL