The nurse is reviewing the indications for atropine sulfate. Atropine is appropriate for which of these clients? (Select all that apply.)
A.
A client who is about to have surgery
B.
A client who has suddenly developed symptomatic tachycardia with a heart rate of 180 beats/min
C.
A client newly diagnosed with myasthenia gravis
D.
A client who has suddenly developed symptomatic bradycardia with a heart rate of 32 beats/min
E.
A client with severe narrow-angle glaucoma
The Correct Answer and Explanation is:
Atropine sulfate is a medication that acts as an anticholinergic agent, primarily used to treat conditions related to bradycardia and to reduce secretions in certain surgical settings. Its main effects include increasing heart rate by blocking vagal influences on the heart and reducing salivary and other secretions. Here’s how atropine applies to each option:
A. A client who is about to have surgery
- Explanation: Atropine is often administered preoperatively to reduce salivary and respiratory secretions, which helps in maintaining a clear surgical field and preventing complications related to excessive secretions. Therefore, this is an appropriate use of atropine.
B. A client who has suddenly developed symptomatic tachycardia with a heart rate of 180 beats/min
- Explanation: Atropine is not typically used for treating tachycardia. It is primarily used to increase heart rate in cases of bradycardia. Tachycardia, an excessively fast heart rate, generally requires different treatment approaches, such as medications that specifically address the underlying cause of the rapid heart rate.
C. A client newly diagnosed with myasthenia gravis
- Explanation: Myasthenia gravis is an autoimmune disorder characterized by weakness of voluntary muscles. Treatment usually involves cholinesterase inhibitors like pyridostigmine to increase acetylcholine levels at neuromuscular junctions. Atropine, being an anticholinergic, would counteract the effects of these medications and could worsen symptoms of myasthenia gravis. Hence, it is not indicated in this case.
D. A client who has suddenly developed symptomatic bradycardia with a heart rate of 32 beats/min
- Explanation: Atropine is commonly used to treat bradycardia (slow heart rate). It works by blocking vagal effects on the heart, thus increasing the heart rate. For symptomatic bradycardia, especially with a heart rate as low as 32 beats/min, atropine is an appropriate treatment option.
E. A client with severe narrow-angle glaucoma
- Explanation: Atropine is contraindicated in patients with narrow-angle glaucoma. This condition involves increased intraocular pressure that can be exacerbated by anticholinergic drugs like atropine, which can dilate the pupils and potentially worsen the condition.
Summary: Atropine sulfate is indicated for:
- A: To reduce secretions before surgery.
- D: To increase heart rate in symptomatic bradycardia.
It is not indicated for:
- B: Tachycardia.
- C: Myasthenia gravis.
- E: Narrow-angle glaucoma.