A nurse is performing a neurovascular assessment on a client who has a fractured left femur. For which of the following findings should the nurse intervene immediately?

Choice A rationale:
The combination of widened QRS, frequent premature ventricular contractions (PVCs), and bradycardia (heart rate of 55/min) on telemetry monitoring suggests hyperkalemia. Elevated potassium levels in the blood can cause delayed repolarization of cardiac cells, leading to widened QRS complexes and PVCs. Bradycardia is another common manifestation of hyperkalemia.
Choice B rationale:
Hypocalcemia, characterized by low calcium levels in the blood, can lead to cardiac arrhythmias, but it typically presents with a prolonged QT interval rather than widened QRS complexes and PVCs.
Choice C rationale:
Hyperglycemia, which is high blood glucose levels, does not directly affect the electrocardiogram (ECG) parameters like QRS width or heart rate. It may have systemic effects, but it is not responsible for the ECG changes described in the scenario.
Choice D rationale:
Hypophosphatemia, or low levels of phosphate in the blood, can cause muscle weakness and may have systemic effects, but it is not associated with the specific ECG changes seen in hyperkalemia, such as widened QRS complexes and PVCs.

Choice A rationale:

The nurse's first priority in this situation should be to close the pinch clamp on the central venous catheter (CVC). This will prevent air from entering the client's vascular system and causing an air embolism, which can lead to serious complications. Once the clamp is closed, the nurse can then proceed with further assessments and interventions.

Choice B rationale:

Obtaining a prescription for stat ABGS (Arterial Blood Gas Studies) is not the first action the nurse should take in this situation. While ABGS may be relevant later to assess the client's respiratory status, the immediate concern is to prevent air embolism by closing the disconnected IV tubing.

Choice C rationale:

Placing the client in the left Trendelenburg position is not the first priority in this situation. The Trendelenburg position is used to increase venous return and is typically indicated in cases of hypotension or shock. Closing the clamp to prevent an air embolism should be the nurse's initial action.

Choice D rationale:

Checking the tubing for the placement of a locking adaptor is not the first action the nurse should take. While it is essential to ensure that the IV tubing is properly connected and secured, preventing the air from entering the CVC should take precedence in this urgent situation.