When tubocurarine is administered, the nurse will first see paralysis of which muscles?
1. The levator muscles of the eyelid and muscles of mastication
2. The muscles in the lower extremities
3. The muscles controlling sphincters
4. The muscles of respiration and the diaphragm
Correct Answer: 1
Rationale 1: Paralysis of the levator muscles of the eyelid and muscles of mastication occurs first.
Rationale 2: Muscles in the lower extremities become paralyzed after the muscles of the eyelids do.
Rationale 3: The muscles controlling sphincters would have later, limited paralytic effects.
Rationale 4: The muscles of respiration and the diaphragm are the last muscles to be affected by tubocurarine.
Global Rationale: Paralysis of the levator muscles of the eyelid and muscles of mastication occurs first. Muscles in the lower extremities become paralyzed after the muscles of the eyelids do. The muscles controlling sphincters would have later, limited paralytic effects. The muscles of respiration and the diaphragm are the last muscles to be affected by tubocurarine.
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