You are precepting a new nurse on your unit. You and the new nurse are caring for a patient who has had brachytherapy. The new nurse asks you what brachytherapy involves. What should you respond?
A) Treatment of coronary artery disease
B) Insertion of a coronary catheter through the brachial plexus
C) The delivery of radiation close to where a stent has been placed.
D) The completion of balloon angiography
Ans: C
Feedback: PTCA and stent implantation cause a cellular reaction in the coronary artery that promotes proliferation of the intima of the artery, increasing the possibility of arterial obstruction. Brachytherapy reduces the recurrence of obstruction, preventing vessel restenosis by inhibiting smooth muscle cell proliferation. Brachytherapy involves the delivery of gamma or beta radiation by placing a radioisotope close to the lesion. Brachytherapy is not treatment of CAD, insertion of a catheter through the brachial plexus, or the completion of balloon angiography.
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