A nurse teaches about normal fetal heart rate. Which value is expected?

Nonsteroidal anti-inflammatory drugs (NSAIDs) inhibit the enzyme cyclooxygenase, which is responsible for the synthesis of prostaglandins. Primary dysmenorrhea is caused by an excess of prostaglandin F2-alpha, which triggers intense uterine contractions and ischemia. Reducing these levels effectively alleviates menstrual cramping and associated systemic symptoms.

A. Antidepressants: While SSRIs are used for the emotional symptoms of premenstrual dysphoric disorder, they are not the first-line treatment for the physical pain of dysmenorrhea. They do not inhibit the uterine prostaglandins that cause the primary cramping. They address neurological rather than myometrial targets.

B. Insulin: Insulin is used to manage diabetes mellitus and has no clinical role in the treatment of menstrual pain. It does not affect uterine contractility or prostaglandin levels. Administering it to a non-diabetic client would cause life-threatening hypoglycemia.

C. Antibiotics: These agents treat infections like pelvic inflammatory disease, which can cause secondary dysmenorrhea. However, they are not used for the symptomatic relief of standard menstrual cramps. Antibiotics do not have analgesic or anti-inflammatory properties for non-infectious pelvic pain.

D. NSAIDS: Drugs like ibuprofen and naproxen are the gold standard for treating dysmenorrhea because they target the biochemical cause of the pain. By lowering prostaglandin concentrations in the menstrual fluid, they reduce uterine hypercontractility. This provides significant relief for most patients.

The umbilical cord is the vital conduit between the placenta and the fetal umbilical ring, facilitating the exchange of respiratory gases and nutrients. It typically contains three distinct vessels encased in a specialized connective tissue matrix. This vascular arrangement ensures that the fetus receives purified blood while removing metabolic byproducts.

A. Vein carries oxygenated blood: Unlike postnatal circulation, the fetal umbilical vein transports high-oxygen blood from the placenta directly to the fetus. This vessel bypasses the fetal lungs via the ductus venosus to deliver oxygen to the heart and brain. It is the primary nutrient supply line for the fetus.

B. Contains one vein: The standard umbilical cord anatomy consists of a single large vein and two smaller arteries. A variation in this number, such as a single umbilical artery, may be associated with other congenital anomalies. Having one vein is the normal physiological finding in human development.

C. Arteries carry oxygenated blood: Fetal umbilical arteries actually transport deoxygenated blood and waste products away from the fetus toward the placenta. This is consistent with the pulmonary arteries in adults, which also carry blood low in oxygen. This statement describes the opposite of fetal vascular physiology.

D. Contains two arteries: The presence of two arteries allows for the efficient clearance of carbon dioxide and urea from the fetal systemic circulation. These vessels wrap spirally around the umbilical vein to provide structural stability to the cord. This is the expected finding during a routine neonatal assessment.

E. Protected by Wharton's jelly: This mucoid substance is rich in glycosaminoglycans and prevents the compression of the umbilical vessels. It provides a cushion that ensures continuous blood flow despite fetal movements or cord knotting. It is essential for maintaining vascular patency throughout gestation.