A postoperative day 1 client after coronary artery bypass grafting has a sudden decrease in drain output from 50 mL to 0 mL, hypotension, and distended neck veins. Which complication should the nurse suspect?

Appeared in: NORCET-11 Mains

Explanation

Cardiac tamponade is the correct diagnosis because it involves the accumulation of fluid (in this case, blood) in the pericardial sac, which compresses the heart.
The sudden cessation of chest tube drainage after cardiac surgery is a red flag for a blockage, leading to blood accumulating around the heart.
This compression impairs the heart's ability to fill, causing decreased cardiac output (leading to hypotension) and a backup of blood into the venous circulation (leading to distended neck veins).
The patient's symptoms of hypotension and JVD are two of the three components of Beck's triad, the classic signs of cardiac tamponade.

Option B: Tension pneumothorax is caused by air accumulating in the pleural space, not fluid in the pericardial sac. The key signs would be absent breath sounds on the affected side and tracheal deviation, which are not present in the scenario.
Option C: Left ventricular failure involves the left ventricle's inability to pump blood effectively, leading to pulmonary congestion. The primary signs would be respiratory, such as crackles, dyspnea, and orthopnea, not JVD.
Option D: Post-pericardiotomy syndrome is an inflammatory response that typically occurs weeks to months after cardiac surgery, not acutely on the first postoperative day. It presents with fever, malaise, and pleuritic chest pain.

Clinical Relevance

Nursing practice connection: Safe nursing care depends on performing Postoperative Complications of Cardiac Surgery in the correct sequence, documenting the action clearly, and monitoring for the expected response.
Recognizing cardiac tamponade is a critical nursing skill, as it is a surgical emergency requiring immediate intervention to prevent cardiac arrest.
Nurses must meticulously monitor chest tube drainage post-cardiac surgery. Any sudden decrease or cessation of output, especially when accompanied by hemodynamic instability, must be reported immediately.
The primary treatment is pericardiocentesis, a procedure to drain the excess fluid from the pericardial sac, which the nurse will prepare the patient for.

How to Approach the Question

First, identify the patient's context: a client on postoperative day 1 after a major cardiac surgery (CABG). This context raises the risk for specific complications like bleeding and tamponade.
Next, analyze the cluster of signs and symptoms presented: a sudden stop in chest drain output, a drop in blood pressure (hypotension), and swelling of neck veins (JVD).
Recognize that the sudden cessation of drainage is a critical clue. It doesn't mean the bleeding has stopped; it more likely means the drain is blocked and blood is accumulating internally.
Connect this internal accumulation of blood around the heart to the hemodynamic consequences: compression of the heart (tamponade) leads to poor filling and pumping (hypotension and JVD).
Evaluate each option against this clinical picture. Cardiac tamponade is the only diagnosis that perfectly explains the combination of a blocked chest tube and the signs of obstructive shock.

Concept Tested & Keywords

Concept Tested: Postoperative Complications of Cardiac Surgery
Stem keywords: postoperative day 1, coronary artery bypass grafting, sudden decrease in drain output, hypotension, distended neck veins
Lead-in keywords: Which complication
Clinical cues: The sudden drop in chest drain output from 50 mL to 0 mL is a critical cue, suggesting a blockage and internal accumulation of fluid rather than a resolution of bleeding.

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E6 Nursing Brunner Adult Health 3SA Vol 1 Part 3 p. 44-46

E6 Medicine Harrison 22e Part 1 p. 2122-2124

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