What should be monitored to assess renal function in a newborn on mechanical ventilation?

• A. PCWP
• B. Diaper weight and blood draw volumes
• C. Humidity levels
• D. Mean pulmonary artery pressure

Answer: (B)

Monitoring diaper weight and blood draw volumes is crucial for assessing renal function in a newborn on mechanical ventilation because these measures provide direct insights into the baby's fluid balance and kidney performance. Diaper weight allows the healthcare provider to estimate urine output, which is an essential indicator of kidney function. A consistent urine output indicates that the kidneys are filtering and excreting waste products effectively, while decreased urine output may suggest renal impairment or dehydration.

Tracking blood draw volumes helps in understanding the baby's hydration status and can aid in diagnosing any potential issues with renal function. Since newborns, especially those on mechanical ventilation, are at risk for various complications, close monitoring of these parameters enables timely interventions if necessary, ensuring that the infant's renal health is maintained.

In contrast, parameters like pulmonary artery pressures and PCWP are more related to cardiac function rather than renal function. Monitoring humidity levels, while important for respiratory support, does not directly assess the function of the kidneys. Therefore, focusing on urine output and fluid balance through diaper weight and blood volumes is essential for evaluating renal health in this vulnerable population.