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Difficulty: MediumReduction of Risk Potential

A nurse discovers that a client's central venous catheter (CVC) tubing has accidentally disconnected from the injection cap. The client suddenly appears extremely restless, is gasping for air, and exhibits circumoral cyanosis. Which of the following is the priority nursing action?

  1. Clamp the catheter and place the client in a left lateral Trendelenburg position.Answer
  2. B
    Elevate the head of the bed to a high-Fowler's position and administer high-flow oxygen.
  3. C
    Increase the primary intravenous fluid infusion rate to manage suspected hypovolemic shock.
  4. D
    Clamp the catheter and position the client in a right side-lying position.

Answer

The priority action is to immediately clamp the catheter and place the client in a left lateral Trendelenburg position.
When a central venous catheter becomes disconnected, the negative intrathoracic pressure during inspiration can draw air into the bloodstream, causing a life-threatening air embolism. The priority is to immediately clamp the catheter to prevent further air entry. Placing the client in a left lateral Trendelenburg position traps the air in the apex of the right atrium, preventing it from migrating into the right ventricle and pulmonary circulation where it would cause a fatal outflow obstruction.

Step-by-Step Solution

1
Identify the clinical complication based on the presentation.
The disconnected CVC combined with sudden dyspnea and cyanosis strongly indicates a central venous air embolism.
Air is drawn into the venous system due to negative intrathoracic pressure during inspiration when the catheter is open to the atmosphere.
2
Determine the priority mechanical intervention to halt the complication.
The catheter must be clamped immediately.
Stopping the source of the embolism is the first critical step in risk reduction to prevent further air entry.
3
Select the appropriate therapeutic positioning to mitigate physiological harm.
The client must be placed in a left lateral Trendelenburg position.
This specific position uses gravity to trap the air bubble in the apex of the right atrium, preventing it from migrating into the right ventricle and pulmonary artery.

Key Concept

Management of a central venous air embolism involves immediately stopping the air entry (clamping) and positioning the client on their left side in Trendelenburg to trap the air in the right atrium.
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Topics

Reduction of Risk Potential

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