When managing the care of a woman in the second stage of labor, the nurse uses various measures to enhance the progress of fetal descent.

These measures include when possible:

Choice A rationale

Sleeping on the abdomen is contraindicated in later pregnancy as it is physically impossible due to the enlarged uterus and poses a risk of direct pressure on the fetus, which is detrimental to comfort and could potentially impede circulation if pressure were applied.

Choice B rationale

The side-lying position, especially the left side, optimizes uteroplacental perfusion by minimizing pressure from the gravid uterus on the vena cava, preventing supine hypotensive syndrome, and improving maternal cardiac output, which enhances fetal oxygenation and is the recommended sleeping position.

Choice C rationale

Lying on the back, even with knees slightly elevated, allows the heavy uterus to compress the inferior vena cava and aorta (supine hypotensive syndrome), significantly reducing venous return to the heart and decreasing blood flow and oxygen delivery to the fetus, which is not recommended.

Choice D rationale

Elevating the head on pillows primarily helps with maternal heartburn or shortness of breath but does not change the position of the uterus relative to the major blood vessels (aorta and vena cava) and therefore does not effectively address the risk of impaired fetal circulation seen in the supine position.

Choice A rationale

Oxytocics are primarily smooth muscle stimulants that act on the uterine fundus to cause firm, sustained contractions. While a contracted uterus helps prevent bacterial entry into open blood vessels, the primary purpose of oxytocics after birth is mechanical, not antimicrobial, and therefore they are not administered to prevent infection.

Choice B rationale

Oxytocics stimulate intense uterine contractions, which can be uncomfortable or painful for the woman. They are administered for physiological necessity, not to facilitate rest or relaxation; analgesics or other supportive measures are used for those goals.

Choice C rationale

Oxytocin stimulates powerful contractions of the myometrium, which causes the uterus to clamp down on the blood vessels that supplied the placenta. This contraction is vital for mechanically compressing the uterine blood vessels at the placental site, which prevents or controls postpartum hemorrhage due to uterine atony.

Choice D rationale

Oxytocin administration causes strong uterine cramping as the uterus contracts, which can actually increase postpartum pain. Pain relief is managed through methods like analgesics, not through the administration of an oxytocic agent, which is a key pharmacological intervention to reduce bleeding.