A nurse assesses four patients. Which patient has greatest risk for hypomagnesemia?

A) Dysrhythmias:
Straining while defecating can trigger the Valsalva maneuver, which involves taking a deep breath and bearing down. This can lead to increased intrathoracic pressure, decreased venous return to the heart, and subsequently a sudden drop in blood pressure when the strain is released. These changes can cause cardiac dysrhythmias, particularly in older adults or those with underlying heart conditions.

B) Dilated pupils:
Dilated pupils are not a known consequence of straining while defecating. Pupillary dilation is typically associated with responses to low light, certain medications, or neurological conditions, rather than gastrointestinal strain.

C) Gastric ulcer:
Gastric ulcers are caused by factors such as Helicobacter pylori infection, prolonged use of nonsteroidal anti-inflammatory drugs (NSAIDs), or excessive stomach acid. Straining during defecation does not contribute to the development of gastric ulcers.

D) Diarrhea:
Straining while defecating is more likely to be associated with constipation rather than diarrhea. Diarrhea involves frequent, loose, or watery stools, whereas straining typically occurs due to hard stools and difficulty passing them.

A) "You will have control of administering your own pain medication":
This statement accurately describes the function of a PCA (Patient-Controlled Analgesia) device, where the client has control over administering their own pain medication within preset limits. Empowering the client to manage their pain helps promote autonomy and individualized pain management.

B) "The pain medication is delivered into your muscle":
This statement is incorrect because PCA devices typically deliver medication intravenously, not into the muscle. It's important for the client to understand the route of administration to use the device effectively and safely.

C) "Your partner can push the PCA button for you if you are asleep":
Allowing someone else to activate the PCA button for the client can lead to overmedication and is not recommended. PCA devices are designed for the client to self-administer medication based on their own pain experience and need.

D) "A large dose of pain medication is given with each injection":
This statement is inaccurate because PCA devices are programmed to deliver a controlled dose of medication with each activation, usually within safe limits set by the healthcare provider. The doses are typically set to avoid overdosing while providing effective pain relief.