A client comes to the emergency room reporting severe abdominal cramping and heavy bleeding at 10 weeks gestation. Cervical examination reveals heavy bleeding, the cervical os is open and tissue is present. Which type of abortion is the client experiencing?

Choice A reason: Respiratory rate is the priority nursing assessment for this client, because magnesium sulfate can cause respiratory depression, which is a life-threatening complication. The nurse should monitor the client's respiratory rate closely, and discontinue the infusion if it falls below 12 breaths per minute.

Choice B reason: Bowel sounds is not a priority nursing assessment for this client, because magnesium sulfate does not have a significant effect on the gastrointestinal system. The nurse should assess the client's bowel sounds as part of the routine physical examination, but it is not a critical parameter for this medication.

Choice C reason: Time of last food intake is not a priority nursing assessment for this client, because magnesium sulfate does not interact with food or affect the absorption of nutrients. The nurse should inquire about the client's dietary intake and preferences, but it is not a vital factor for this medication.

Choice D reason: Temperature is not a priority nursing assessment for this client, because magnesium sulfate does not cause fever or hypothermia. The nurse should measure the client's temperature as part of the vital signs, but it is not a key indicator for this medication.

Choice A reason: Obtaining a type and crossmatch is not the first action that the nurse should take, as it is a preparatory step for blood transfusion, which may or may not be needed. The nurse should first identify the cause and severity of the hypotension, and initiate immediate interventions to stop the bleeding and restore the circulation.

Choice B reason: Administering oxytocin infusion is not the first action that the nurse should take, as it is a pharmacological intervention that requires a prescription and an assessment of the uterine tone and bleeding. The nurse should first evaluate the firmness of the uterus and massage it if needed, to stimulate the contraction and retraction of the uterine muscle.

Choice C reason: Initiating oxygen therapy by nonrebreather mask is not the first action that the nurse should take, as it is a supportive intervention that aims to improve the oxygen delivery to the tissues and organs. The nurse should first address the underlying cause of the hypotension, which is most likely postpartum hemorrhage, and prevent further blood loss and shock.

Choice D reason: Evaluating the firmness of the uterus is the first action that the nurse should take, as it can help determine the source and extent of the bleeding, and guide the subsequent interventions. The nurse should palpate the fundus and check the lochia, and report any signs of uterine atony, which is the most common cause of postpartum hemorrhage.