The nurse assesses a newborn infant. Which assessment finding places the infant at greatest risk for fluid loss?

Fine vellus hair replacing lanugo

Presence of cradle cap

Presence of vernix caseosa at birth

Thin, smooth, and permeable skin

Answer and Explanation

The Correct Answer is D

A. Lanugo is the fine hair covering a newborn’s body that helps protect the skin. Its presence or replacement with vellus hair is a normal developmental finding and does not directly affect the newborn’s risk for fluid loss.

B. Cradle cap, or seborrheic dermatitis, is a superficial scaling of the scalp. It is a cosmetic and dermatologic condition that does not increase fluid loss or compromise skin integrity systemically.

C. Vernix caseosa is a white, cheesy substance covering the skin at birth. It protects the skin from amniotic fluid in utero and assists with thermoregulation and moisture retention initially. Its presence at birth actually reduces the risk of fluid loss rather than increases it.

D. Newborns, especially preterm infants, have thin, immature, and highly permeable skin, which allows for increased transepidermal water loss. This places the infant at greatest risk for dehydration and fluid and electrolyte imbalances. The skin’s barrier function is underdeveloped, making thermoregulation and fluid retention more challenging. Newborns with this skin characteristic require careful monitoring of hydration status, fluid intake, and temperature control to prevent complications.

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Correct Answer is C

Explanation

A. Seeing a dermatologist every 5 years is insufficient for preventive skin care. Routine skin checks, especially for high-risk individuals, are recommended annually or sooner if changes are noticed. Therefore, this is not the most effective preventive measure.

B. Replacing suntanning with tanning beds is harmful. Tanning beds expose the skin to high levels of UV radiation, which accelerates premature aging, increases the risk of skin cancer, and damages collagen and elastin. This is not a safe alternative.

C. Refraining from smoking or vaping is a key factor in preventing premature skin aging. Nicotine and other chemicals in tobacco products reduce blood flow, impair collagen synthesis, and promote wrinkles and skin laxity. Avoiding smoking or vaping helps maintain skin elasticity, hydration, and overall skin health, making this the correct recommendation.

D. Using sunscreen with at least 15 SPF offers some protection, but the current guideline for daily sun protection is SPF 30 or higher. While sunscreen is important, the given SPF recommendation is too low to fully prevent premature aging and damage.

A. Pulse oximetry readings of 90% B. Irregular heart rhythms or arrythmias C. A body temperature of 97°F (36.1°C) D. Shallow and increased respiratory rate E. Decreased systolic blood pressure

Correct Answer is ["B","C","D"]

Explanation

A. An SpO₂ of 90% is below normal and indicates hypoxemia, not an expected age-related change. Normal oxygen saturation for older adults is generally 95–100% on room air. A reading of 90% requires assessment and possible intervention.

B. Older adults are more likely to develop age-related changes in cardiac conduction, including atrial fibrillation, premature beats, or other arrhythmias. These changes are often due to fibrosis of the conduction system, loss of pacemaker cells, and decreased myocardial elasticity, and may be anticipated as part of normal aging, though they may also require monitoring.

C. Older adults often have a lower baseline body temperature compared with younger adults due to reduced metabolic rate and decreased thermoregulatory responses. A temperature around 97°F is an expected age-related change and may mask fever in older adults.

D. Age-related changes in the respiratory system include decreased lung elasticity, weakened respiratory muscles, and reduced alveolar surface area, which may result in shallow breathing and slightly increased respiratory rates at rest. These are considered typical physiological changes with aging.

E. With aging, systolic blood pressure tends to increase, not decrease, due to stiffening of the arteries and decreased vascular compliance. Isolated systolic hypertension is common in older adults, whereas a decreased systolic BP is not expected as an age-related change.

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