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A preterm infant nearing discharge has frequent small, nonbilious spit-ups. Feeding adjustments have not eliminated the episodes, but the infant feeds comfortably and gains weight appropriately. What is the most appropriate management?

A 25-week infant develops free intraperitoneal air on day 5 of life. Surgery reveals a single perforation in the terminal ileum with minimal surrounding inflammation. The remaining bowel appears healthy. Which diagnosis best fits these findings?

A newborn develops seizures and an urgently obtained venous sample confirms a serum sodium of 117 mEq/L. Blood glucose and ionized calcium are normal. Airway and breathing support are in place and IV access is established. Which electrolyte intervention should the NNP initiate?

A stable 3-day-old infant has abdominal distension, bilious gastric drainage, and has not passed meconium. The anus is patent and an upper GI study has excluded malrotation. There is no evidence of perforation or enterocolitis. Which study best evaluates the colon for abnormal caliber, a transition zone, or obstructing material?

Why must daily weight be interpreted with intake, urine output, sodium, and environmental exposure when estimating insensible water loss?

A preterm infant develops abdominal distension, mild tenderness, and a bloody stool. Perfusion remains stable, with no metabolic acidosis or coagulopathy. Abdominal radiography shows pneumatosis intestinalis without portal venous gas or free air. Which modified Bell stage is most consistent with these findings?

A growth-restricted preterm infant born after maternal preeclampsia had isolated early neutropenia that was resolving. On day 6, the infant develops temperature instability, recurrent apnea, and poor perfusion. The ANC falls again and platelets begin to decline. Which explanation deserves priority for the new blood-count pattern?

Residual return

A company producs bottled drink on a machine-paced line with four steps: (1) the bottling machine takes 1 second to fill a bottle, (2) the lid machine takes 3 seconds to cover the bottle with a lid, (3) a labeling machine takes 5 seconds to apply a label to a bottle, and (4) the packaging machine takes 4 seconds to place a bottle into a box. Problem data are summarized below. Process Step Number of Machines Seconds per Bottle Bottling 1 1 Applying a lid 1 3 Labeling 2 5 Packaging 1 4 Question: If one more identical labeling machine is added to the process, how much is the increase in the process capacity going to be (in terms of bottles/hour)?

Assume a wage rate of $18 per hour. What are the direct labor costs for one guest (in $)?