A client with intestinal obstruction has a nasogastric tube to low intermittent suction and is receiving an intravenous (IV) infusion of lactated Ringer's at 100 mL/hour. Which finding is most important for the nurse to report to the healthcare provider? Reference Range: Potassium (3.5 to 5 mEq/L (3.5 to 5 mmol/L).

Choice A rationale: Reporting the 24-hour intake at the current infusion rate is not the most important finding to report to the healthcare provider in this case. It is essential to monitor intake and output, but a single report of the 24-hour intake is not as critical as other findings. Choice B rationale: Reporting a serum potassium level of 3.1 mEq/L (3.1 mmol/L) is the most important finding to report to the healthcare provider. The patient's potassium level is below the normal range, indicating hypokalemia. Hypokalemia can have serious cardiac and neuromuscular effects, including arrhythmias and muscle weakness. Prompt intervention, such as potassium supplementation or adjustment of IV fluids, is necessary to address this potentially life-threatening condition. Choice C rationale: Reporting a gastric output of 900 mL in the last 24 hours is significant and should be reported to the healthcare provider, but it is not as urgent as the low potassium level. Gastric output should be monitored to assess for signs of improvement or worsening, but hypokalemia takes precedence due to its immediate health risks. Choice D rationale: Reporting an increased blood urea nitrogen (BUN) is important for the overall assessment of the patient's renal function but is not the most critical finding in this scenario. The low potassium level is a more immediate concern and requires immediate attention.