In assessing a 1-day-old male newborn, the nurse observes that the scrotal sac is large, swollen, smooth, and taut. Which assessment technique should the nurse perform to determine if the newborn has a hydrocele?

Rationale: A. Grasp high on the sac and gently palpate downward to feel each testis present: This technique helps assess for undescended testes but does not confirm the presence of fluid characteristic of a hydrocele. B. Observe daily for the resolution of scrotal edema influenced by placental hormones: While some neonatal swelling may resolve spontaneously, observation alone does not provide an immediate method to differentiate a hydrocele from other causes of scrotal swelling. C. Palpate for a soft, mushy structure that is nontender and distinct from a normal testis: Palpation can identify abnormalities in consistency, but distinguishing hydrocele fluid from testicular tissue is challenging without additional assessment methods like transillumination. D. Perform transillumination of the scrotal sac to visualize a red glow of fluid around the testes: Transillumination is the most effective technique to confirm a hydrocele. A hydrocele allows light to pass through the fluid-filled sac, producing a red glow, which differentiate it from solid masses or other scrotal abnormalities.