Methergine is prescribed for a woman to treat postpartum hemorrhage.
Before administration of this medication, the priority nursing assessment is to check the:

Choice A rationale

While addressing the client's pain is important, the priority action should be to assess the underlying cause of the concerning vital signs before offering pain medication.

Choice B rationale

Positioning the client with one hip elevated is a measure used to relieve potential vena cava compression, but the low blood pressure warrants immediate attention and further evaluation before implementing this intervention.

Choice C rationale

Having the client void may be a helpful intervention in some labor situations, but the combination of a low maternal blood pressure and a high maternal heart rate requires immediate notification of the provider.

Choice D rationale

The client's low blood pressure (82/54 mm Hg) and elevated maternal heart rate (128/min) in the presence of contractions with a duration of 1 minute and a frequency of 3 minutes are concerning findings that warrant immediate notification of the provider for further evaluation and management. These vital signs could indicate maternal hypovolemia, dehydration, or other complications. .

Choice A rationale

Pain in the abdomen, shoulder, or back can be associated with pre-term labor or other pregnancy complications and should be assessed. However, respiratory depression, hypotension, and absent tendon reflexes are more indicative of magnesium sulfate toxicity and pose an immediate threat to the client's safety.

Choice B rationale

Magnesium sulfate is a central nervous system depressant used to prevent seizures in pre-eclampsia and tocolysis in pre-term labor. Respiratory depression (respiratory rate less than 12 breaths per minute), hypotension (systolic blood pressure less than 90 mmHg or a significant drop from baseline), and absent deep tendon reflexes are signs of magnesium toxicity and require immediate intervention to prevent serious adverse effects.

Choice C rationale

Severe lower back pain, leg cramps, and sweating can be symptoms of pre-term labor or other musculoskeletal issues during pregnancy. While important to assess and manage, they do not represent the same immediate life-threatening risk as magnesium toxicity.

Choice D rationale

Low potassium or elevated glucose levels, tachycardia, and chest pain are not typical side effects of magnesium sulfate. These findings could indicate other underlying medical conditions that need investigation, but they are not the priority assessment related to magnesium sulfate administration compared to signs of toxicity. Normal potassium range is 3.5-5.0 mEq/L, normal fasting glucose is 70-100 mg/dL.