A nurse is caring for a client who is at 30 weeks of gestation.
The nurse should plan to immunize the client with which of the following vaccines? (Select all that apply)

Choice A rationale

Sequential compression devices (SCDs) are applied preoperatively to promote venous return and prevent venous stasis in the lower extremities, significantly reducing the risk of deep vein thrombosis (DVT) and subsequent pulmonary embolism (PE), which are critical concerns during and after major surgery like a cesarean birth. Prophylaxis should commence before the operation for maximal effect.

Choice B rationale

An indwelling urinary catheter is typically inserted prior to the cesarean section, after the client receives regional anesthesia, to ensure the bladder is empty during the procedure, preventing injury to the bladder by the surgeon and maintaining a clear surgical field. It is not delayed until immediately following the procedure.

Choice C rationale

Oxytocin is a uterotonic agent administered post-delivery of the placenta (not prior to the procedure) via continuous IV infusion to stimulate uterine contractions, which is crucial for preventing postpartum hemorrhage by promoting myometrial contraction and vessel constriction.

Choice D rationale

The surgical timeout, a critical patient safety measure that verifies the correct patient, procedure, and surgical site, is performed by the entire surgical team immediately prior to the incision, typically after the client enters the operating room and is prepped, not while they are in the preoperative holding area.

Choice A rationale

Hemorrhagic shock results from significant blood loss, leading to decreased circulating blood volume and subsequent hypotension. Therefore, hypertension is not expected; instead, the nurse should anticipate hypotension as a classic sign, indicating the body's compensatory mechanisms are failing to maintain adequate perfusion. Systolic blood pressure below 90 mmHg is a common indicator of shock.

Choice B rationale

Initial compensatory mechanisms in shock, driven by the sympathetic nervous system, usually include tachypnea (increased respiratory rate) to enhance oxygenation and address resulting metabolic acidosis. Bradypnea (abnormally slow respiratory rate, normal 12-20 breaths/min) is a late and ominous sign, reflecting profound central nervous system depression and circulatory failure.

Choice C rationale

Tachycardia (heart rate >100 beats/min) is an early and compensatory sign of hemorrhagic shock, triggered by the release of catecholamines (epinephrine, norepinephrine). The sympathetic nervous system increases the heart rate and contractility to compensate for the reduced stroke volume caused by the hypovolemia and maintain cardiac output and tissue perfusion.

Choice D rationale

Hemorrhagic shock causes a severe reduction in renal blood flow due to vasoconstriction and low systemic pressure. This results in oliguria (urine output <30 mL/hr) or anuria, not polyuria. Decreased urine output is a critical indicator of inadequate perfusion to the kidneys and is a classic finding in progressing shock.