A nurse is assisting the physician, who is inserting a central venous access port into a patient at the bedside. A local anesthetic is administered
Within minutes of administration of the anesthet-ic, the vital signs reveal a pulse of 54/minute, respirations of 18/minute, and blood pressure of 90/42 . The nurse should monitor the patient for further signs of a. heart block.
b. anaphylaxis.
c. central nervous system excitation.
d. respiratory depression.
A
When absorbed in sufficient amount, local anesthetics can affect the heart and blood vessels. These drugs suppress excitability in the myocardium and conduction system and can cause hy-potension, bradycardia, heart block, and potentially cardiac arrest.
Anaphylaxis would be manifested by hypotension, bronchoconstriction, and edema of the glottis.
Central nervous system excitation would be manifested by hyperactivity, restlessness, and an-xiety and may be followed by convulsions.
No evidence indicates respiratory depression; this patient's respirations are within normal limits.
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