Bioscience: Thyroidectomy

What is the preoperative goal of pharmacologic prophylaxis for patients with hyperthyroidism?

• To maintain a hyperthyroid state via admin-

  istration of exogenous thyroid hormone

• To blunt the sympathetic nervous system

  by obtaining an adequate depth of anes- thetic and avoiding drugs that cause sym- pathetic stimulation

• To stimulate the sympathetic nervous system via administration of cardiac stimulants

• To observe complete muscle paralysis via administration of a nondepolarizing neuro- muscular blocker

Which sign is not commonly observed during thyroid storm?

• Hypertension

• Hyperthermia

• Tachycardia

• Hypercarbia

Which best describes the physiologic sequence

that leads to the biosynthesis of thyroid hormone?

• Thyroid stimulating hormone stimulates

  the thyroid gland to produce T3 and T4

• Thyrotropin releasing hormone stimulates the thyroid gland to produce thyroid hormone

• T3 and T4 directly stimulate the thyroid

  gland to produce thyroid hormone

• T3 and T4 directly stimulate the hypothalamus to produce thyroid stimulating hormone

Due to its close proximity to the thyroid gland,

accidental removal of the parathyroid gland may result in:

• hypokalemia.

• hypermagnesemia

• hypomagnesemia

• hypocalcemia.