The nurse is assessing a client's arteriovenous (AV) fistula. Which finding provides evidence of its normal function?

A. Keep the client NPO: Postoperative strictures can cause obstruction, and keeping the client NPO prevents further gastric contents from worsening vomiting or causing aspiration. This is the priority intervention during acute management.

B. Encourage small frequent meals: This may be appropriate once the obstruction resolves, but currently it could exacerbate vomiting and worsen fluid/electrolyte imbalance.

C. Provide protein enriched shakes: Nutritional supplementation is important long-term, but during acute stricture with ongoing vomiting, oral intake should be withheld until the obstruction is addressed.

D. Administer daily vitamin supplements: Vitamins are important post-bariatric surgery, but the immediate priority is stabilizing fluid balance and preventing further complications from the stricture.

• Pain: heaviness in the chest, rated 6/10 – Heart failure
The sensation of chest heaviness can result from fluid accumulation in the ventricles and decreased cardiac output in HF. Patients often describe exertional or resting chest discomfort due to pulmonary congestion and increased cardiac workload. This aligns with the client’s history of HF and current findings of crackles and tachycardia.

• Temperature 100.2°F – UTI
Mild fever may indicate infection. While COPD and HF can produce systemic stress responses, the presence of urinary frequency, increased thirst, and mild hyperthermia suggests a urinary tract infection. These systemic signs are more consistent with a mild infection than with decompensated HF or COPD exacerbation alone.

• Oxygen saturation 87% on 2L – COPD
Chronic hypoxemia is characteristic of COPD due to impaired gas exchange from airway obstruction and alveolar destruction. Even with supplemental oxygen, the client’s saturation remains low, reflecting baseline hypoxemia commonly observed in advanced COPD. Cyanosis and clubbing may also accompany these findings.

• Heart sounds S1, S2, S3, S4 – Heart failure
Presence of S3 and S4 heart sounds indicates ventricular dysfunction. S3 often reflects volume overload and early HF, while S4 is associated with stiff ventricles. These abnormal sounds, combined with JVD and crackles, provide classic evidence of HF pathophysiology.

• Respiration 38 breaths/min – COPD
Tachypnea reflects the increased work of breathing often seen in COPD exacerbations. Shallow, rapid respirations help maintain oxygenation in the setting of airflow obstruction and hyperinflated lungs. This respiratory pattern aligns with COPD pathophysiology rather than infection or cardiac issues alone.

• Jugular vein distention – Heart failure
JVD reflects increased central venous pressure from right-sided or biventricular failure. This physical finding is a hallmark of HF and indicates fluid overload. It corresponds with other signs such as crackles and peripheral edema often observed in decompensated HF.

• Expiratory wheezing and crackles – COPD and Heart failure
Expiratory wheezing indicates airway narrowing, consistent with COPD. Crackles in the lung bases can occur in both HF and COPD; in HF, they result from pulmonary edema, while in COPD, mucus accumulation and airway collapse contribute. The combination of wheezing and crackles reflects overlapping pathophysiology in this client.