# A premature infant born at 30 weeks gestation is being monitored in the NICU. The nurse notices the infant has developed abdominal distention, bilious vomiting, and bloody stools. The infant appears lethargic and has temperature instability. Which nursing action should be the priority?

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> subject: Maternal Newborn Health

## 문제

A premature infant born at 30 weeks gestation is being monitored in the NICU. The nurse notices the infant has developed abdominal distention, bilious vomiting, and bloody stools. The infant appears lethargic and has temperature instability. Which nursing action should be the priority?

## 보기

1. Increase the frequency of feedings to maintain nutrition
2. Discontinue enteral feedings immediately and notify the physician **✔ 정답**
3. Administer probiotics to restore normal gut flora
4. Position the infant prone to reduce abdominal pressure

**정답: 2**

## 해설

Immediate cessation of enteral feedings is critical when NEC is suspected to prevent intestinal damage and perforation. Other interventions like probiotics or positioning are not initial priorities.

## 심화 해설

Clinical Presentation and Pathophysiology

The infant in this scenario is exhibiting the classic clinical triad of necrotizing enterocolitis (NEC): abdominal distention, bilious vomiting, and bloody stools, accompanied by systemic signs of lethargy and temperature instability. NEC is one of the most devastating gastrointestinal emergencies in neonatology, primarily affecting preterm infants due to a convergence of intestinal immaturity, gut microbiota dysbiosis, and impaired mucosal immunity [4]. The premature gut has decreased motility, reduced digestive enzyme activity, and increased mucosal permeability, creating a vulnerable environment where enteral feeding—particularly formula feeding—can trigger an exaggerated inflammatory cascade [4]. This inflammatory process can rapidly progress from mucosal injury to transmural necrosis and, ultimately, intestinal perforation [2].

Priority Nursing Action and Rationale

The priority nursing action is to discontinue enteral feedings immediately and notify the physician. In the setting of suspected or confirmed NEC, continued enteral feeding introduces substrate into an already inflamed and ischemic bowel, fueling bacterial fermentation, gas production, and further distention, which accelerates the risk of perforation [4]. Bowel rest is the cornerstone of initial medical management because it reduces the metabolic demand on the injured intestine and limits the progression of the inflammatory injury [2]. The clinical signs described—bilious vomiting and bloody stools—indicate that the mucosal barrier is already compromised, and any additional feeding could precipitate a surgical abdomen. The urgency of this intervention is underscored by the fact that pneumoperitoneum, a sign of frank perforation, remains the sole absolute indication for immediate surgical intervention in NEC [2]. Discontinuing feedings is the nurse's first-line action to prevent reaching that critical point.

Analysis of Incorrect Options

- Option 1 (Increase the frequency of feedings to maintain nutrition): This action is contraindicated and dangerous. NEC develops at the crossroads of intestinal immaturity and suboptimal nutritional practices [4]. Increasing enteral feedings in the presence of active disease would exacerbate the inflammatory condition and increase the risk of rapid deterioration requiring surgical intervention [2]. Nutritional support during the acute phase of NEC is provided via parenteral nutrition, not the enteral route.

- Option 3 (Administer probiotics to restore normal gut flora): While gut microbiota dysbiosis is a recognized contributing factor in the pathogenesis of NEC [4], probiotic administration is a preventive strategy considered in stable infants, not a rescue treatment during an acute episode. In the presence of a compromised intestinal barrier with active inflammation and bloody stools, introducing live bacteria could theoretically increase the risk of translocation and sepsis. The immediate priority is hemodynamic stabilization and bowel rest, not manipulation of the gut flora.

- Option 4 (Position the infant prone to reduce abdominal pressure): Prone positioning does not address the underlying pathophysiology of NEC and can complicate the ongoing monitoring of a lethargic infant with temperature instability. Abdominal distention in NEC results from intramural gas (pneumatosis intestinalis) and ileus, which are not relieved by positional changes. Furthermore, dynamic clinical assessment supported by laboratory markers of systemic inflammation and targeted imaging is essential to determine disease progression [2]; a prone position could obscure abdominal assessment and delay recognition of an acute surgical abdomen.

Clinical Decision-Making and Monitoring

The nurse's immediate cessation of enteral feedings is followed by prompt physician notification because the need for surgery in NEC is best anticipated through dynamic clinical assessment [2]. The physician will evaluate for the presence of pneumoperitoneum, which mandates immediate surgical consultation [2]. In parallel, the nurse should initiate gastric decompression via nasogastric tube, administer intravenous fluids to stabilize hemodynamics, and obtain laboratory markers of systemic inflammation or ischemia, such as a complete blood count, C-reactive protein, and blood cultures [2]. The infant’s clinical trajectory will guide whether the condition remains medically manageable or progresses to surgical NEC, which continues to carry significant morbidity and mortality in preterm and very-low-birth-weight infants [2].References (research sources)

- [2]Surgical Necrotising Enterocolitis (S-NEC): Where We Stand Today: A Narrative Review.Research articleManousi M, Dellaportas D, Nastos K, Siouli C, De Verney Y, Dimopoulou A, Zavras N. (2026) · DOI: 10.3390/jcm15062236

- [4]Necrotizing Enterocolitis in Preterm Infants: An Inflammatory Condition at the Crossroads of Intestinal Immaturity, Dysbiosis, and Nutrition.Research articleNyenga AM, Mukuku O, Ziazia JS, Wembonyama SO. (2026) · DOI: 10.1155/ijpe/9191604

## 임상 시나리오

NEC Bowel Rest ProtocolImmediate Cessation of Enteral Feedings
Upon recognizing the NEC triad (abdominal distention, bilious vomiting, bloody stools) with systemic signs like lethargy, the priority is to discontinue all enteral feedings immediately. This provides bowel rest, reducing metabolic demand and preventing further bacterial fermentation that can lead to perforation.

Notify the physician or neonatal nurse practitioner STAT. Prepare to initiate IV fluids (typically D10W) to maintain hydration and glucose homeostasis. Decompression via an orogastric tube to low intermittent suction is often ordered to relieve distention.

CautionNever attempt to "restart slowly" or switch to a different formula during an acute NEC episode. Continued enteral stimulation of an ischemic bowel significantly increases the risk of transmural necrosis and intestinal perforation, which are life-threatening surgical emergencies.

## 핵심 개념

- **Necrotizing Enterocolitis (NEC)** — A severe gastrointestinal emergency in preterm infants characterized by intestinal inflammation, bacterial overgrowth, and necrosis, presenting with abdominal distention, bilious vomiting, and bloody stools.
- **Bowel Rest** — The immediate cessation of enteral feedings to reduce metabolic demand and substrate in the inflamed gut, a cornerstone of initial NEC management to prevent perforation.
- **Pathognomonic Triad** — The classic clinical presentation of NEC consisting of abdominal distention, bilious vomiting, and bloody stools, often accompanied by systemic signs like lethargy and temperature instability.
- **Transmural Necrosis** — Full-thickness death of the intestinal wall tissue, a severe complication of progressive NEC that can lead to perforation and peritonitis.

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