# A nurse is assessing a 32-week gestational age preterm infant who is now 8 weeks old. Which assessment finding would be most concerning for retinopathy of prematurity (ROP)?

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> subject: Maternal Newborn Health

## 문제

A nurse is assessing a 32-week gestational age preterm infant who is now 8 weeks old. Which assessment finding would be most concerning for retinopathy of prematurity (ROP)?

## 보기

1. Absence of red reflex in both eyes during ophthalmoscopic examination **✔ 정답**
2. Mild jaundice with bilirubin level of 8 mg/dL
3. Heart rate of 140 beats per minute
4. Weight gain of 20 grams per day

**정답: 1**

## 해설

Absence of red reflex in a preterm infant may indicate severe ROP or other ocular pathology requiring immediate ophthalmologic evaluation. Other findings are common in preterm infants and not specific to ROP.

## 심화 해설

Understanding the Clinical Concern

The most concerning finding in this 8-week-old preterm infant (born at 32 weeks, now 40 weeks postmenstrual age) is the absence of red reflex in both eyes. To understand why, it is essential to grasp the pathophysiology of retinopathy of prematurity (ROP). ROP is a disorder affecting the developing retinal vasculature of preterm infants. In the weeks following birth, exposure to supplemental oxygen and the relative hyperoxia of the extrauterine environment can halt normal retinal vessel growth. This is followed by a phase of hypoxia-driven, disorganized vascular proliferation that can lead to retinal detachment and blindness if untreated [2,3].

Why the Absence of Red Reflex is the Priority Finding

The red reflex is a normal finding during ophthalmoscopy, representing light reflecting off the healthy, vascularized retina. Its absence, particularly when bilateral, indicates that the light path is obstructed. In an infant at high risk for ROP, the most critical and vision-threatening cause of a lost red reflex is a total retinal detachment or a dense vitreous hemorrhage, both hallmarks of advanced, severe ROP (Stage 4 or 5). This is a medical emergency requiring immediate ophthalmological intervention. The International Classification of Retinopathy of Prematurity (ICROP) was updated to precisely stage these severe manifestations, as ROP remains a leading cause of preventable blindness worldwide [2]. Screening methods, such as binocular indirect ophthalmoscopy (BIO), are designed specifically to detect these posterior pole changes early, making the absence of a red reflex an immediate and critical red flag .

Analysis of Other Options

The other findings are either expected or less immediately critical in this clinical context.

- Mild jaundice (Option 2): A bilirubin level of 8 mg/dL in an 8-week-old infant is a mild, often physiological finding and is not a direct indicator of acute, severe ROP pathology. While extreme prematurity involves multiple system immaturities, this bilirubin level does not signal an immediate threat to vision.

- Heart rate of 140 bpm (Option 3): A heart rate of 140 beats per minute falls within the normal range for a term-equivalent infant and is an expected finding, not a sign of ROP progression.

- Weight gain of 20 g/day (Option 4): While poor postnatal weight gain is a well-established systemic risk factor for developing severe ROP, a gain of 20 grams per day is generally considered adequate. Research into nutritional factors explores how absolute weight gain influences retinal development, specifically the development of the foveal light reflex, but this finding itself is reassuring rather than concerning . The absence of the red reflex represents a direct, structural ocular emergency that takes immediate priority over a nutritional risk factor.References (research sources)

- [2]Retinopathy of Prematurity (ROP): Are We There Yet?Research articleCoughlin E, Alvarado W, Barathi VA, Ramchandran R, Costakos DM, Ramasubramanian A, Chaurasia SS. (2026) · DOI: 10.3390/medicina62050869

## 임상 시나리오

ROP Screening & Red Flag AssessmentIdentifying the absent red reflex in preterm infants
The red reflex must be assessed in all preterm infants at risk for ROP. A bilateral absent reflex is a medical emergency, as it often indicates advanced ROP with retinal detachment or dense vitreous hemorrhage.

First ROP screening exam is timed by postmenstrual age (PMA). For an infant born at 32 weeks, the initial exam should occur by 4 weeks of chronological age or 31-33 weeks PMA, per AAP guidelines.

CautionDo not dismiss an absent red reflex as a technique error. Immediate dilation of the pupil and examination by an ophthalmologist is required to rule out Stage 4 or 5 ROP.

## 핵심 개념

- **Retinopathy of Prematurity (ROP)** — A disorder of the developing retinal vasculature in preterm infants, characterized by arrested vessel growth followed by abnormal proliferation, which can lead to retinal detachment and blindness.
- **Red Reflex** — The normal reddish-orange reflection of light from the retina observed during ophthalmoscopy; its absence can indicate an obstruction such as a cataract, vitreous hemorrhage, or retinal detachment.
- **Postmenstrual Age (PMA)** — The gestational age at birth plus the chronological age after birth; used to determine the timing of ROP screening exams.

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