A nurse is preparing a client with Crohn’s disease for a barium enema. What should the nurse do the day before the test?

Choice A: Tachycardia

Tachycardia, defined as a heart rate exceeding 100 beats per minute, can affect the accuracy of pulse oximetry readings. When the heart beats too quickly, it may not fill with enough blood between beats, leading to reduced perfusion and oxygen delivery to tissues. However, while tachycardia can influence the readings, it is not the most significant factor compared to hypotension.

Choice B: Hypotension

Hypotension, or low blood pressure, significantly impacts pulse oximetry accuracy. When blood pressure is low, there is reduced perfusion to peripheral tissues, including the extremities where pulse oximeters are typically placed. This reduced perfusion can lead to inaccurate readings, as the device may not detect sufficient blood flow to measure oxygen saturation accurately. Hypotension is a critical factor that can alter pulse oximetry values, making it the most relevant choice.

Choice C: Tachypnea

Tachypnea, or rapid breathing, can affect oxygen levels in the blood but does not directly interfere with the pulse oximeter’s ability to measure oxygen saturation. While it indicates respiratory distress and can lead to hypoxemia, the pulse oximeter can still provide accurate readings unless accompanied by other factors like low perfusion.

Choice D: Fever

Fever can cause peripheral vasodilation, which might theoretically affect pulse oximetry readings by altering blood flow to the extremities. However, this effect is generally minimal compared to the impact of hypotension. Fever alone is unlikely to cause significant inaccuracies in pulse oximetry measurements.

Choice A Reason:

Gaining weight can be an indicator of improved nutrition, but it does not directly address the client’s ability to swallow safely and effectively. Weight gain could be due to other factors such as fluid retention or changes in metabolism. Therefore, while it is a positive outcome, it is not the best indicator of improved swallowing function.

Choice B Reason:

Choosing preferred items from the menu indicates that the client is engaged in their meal planning and has an appetite. However, it does not directly measure the client’s ability to swallow safely. The client might still have difficulty swallowing even if they are choosing their preferred foods.

Choice C Reason:

Clear understanding and articulation are important for communication and can indicate cognitive improvement. However, this choice does not directly relate to the client’s swallowing ability. The primary concern in this scenario is the client’s ability to swallow safely, not their communication skills.

Choice D Reason:

Eating 75 to 100% of all meals and snacks is the best indicator that the client has improved their swallowing ability. This choice directly measures the client’s ability to consume food and liquids safely and effectively. It shows that the client can manage their meals without significant difficulty, which is the primary goal of the intervention.