an infant with tetralogy of fallot becomes acutely cyanotic and hyperneic which action should the nurse implement first
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Nursing Elites

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HESI Maternity Test Bank

1. An infant with tetralogy of Fallot becomes acutely cyanotic and hyperneic. Which action should the nurse implement first?

Correct answer: A

Rationale: In a tetralogy of Fallot situation, placing the infant in a knee-chest position is the initial priority to help increase systemic vascular resistance, which reduces the right-to-left shunt and improves oxygenation. This position can assist in optimizing oxygen levels before considering other interventions. Administering morphine sulfate (choice B) is not the first-line treatment for tetralogy of Fallot crisis. Starting intravenous fluids (choice C) may be necessary but is not the priority in this situation. Providing 100% oxygen by face mask (choice D) may not fully address the underlying issue of decreased systemic vascular resistance that leads to cyanosis in tetralogy of Fallot.

2. The healthcare provider prescribes magnesium sulfate 6 grams intravenously (IV) to be infused over 20 minutes for a client with preterm labor. The IV bag contains magnesium sulfate 20 grams in dextrose 5% in water 500 mL. How many mL/hour should the nurse set the infusion pump?

Correct answer: A

Rationale: To calculate the infusion rate, first, determine the total volume to be infused (6 grams of magnesium sulfate) over a specific time frame (20 minutes). Then, calculate the concentration of magnesium sulfate in the IV bag to determine the mL/hour rate. The IV bag contains 20 grams of magnesium sulfate in 500 mL of solution, which means there are 4 grams of magnesium sulfate per 100 mL. Since 6 grams are required, the nurse should set the pump to deliver 150 mL/hour to infuse the prescribed dose over 20 minutes. Choice B, 250 mL/hour, is incorrect because it miscalculates the amount of magnesium sulfate infused per hour. Choice C, 50 mL/hour, is incorrect as it is too slow to deliver the required dose in the specified time frame. Choice D, 275 mL/hour, is incorrect as it overestimates the infusion rate and would deliver the dose too quickly.

3. When should the LPN/LVN encourage the laboring client to begin pushing?

Correct answer: C

Rationale: The LPN/LVN should encourage the laboring client to begin pushing when the cervix is completely dilated to 10 centimeters. Pushing before full dilation can lead to cervical injury and ineffective labor progress. By waiting for complete dilation, the client can push effectively, aiding in the descent of the baby through the birth canal. Choices A, B, and D are incorrect because pushing before complete dilation can be harmful and may not effectively help in the descent of the baby. The presence of an anterior or posterior lip of the cervix, the urge to have a bowel movement, or complete effacement of the cervix are not indicators for the initiation of pushing during labor.

4. When performing the daily head-to-toe assessment of a 1-day-old newborn, the nurse observes a yellow tint to the skin on the forehead, sternum, and abdomen. Which action should the nurse take?

Correct answer: A

Rationale: The presence of a yellow tint on the skin of a newborn suggests jaundice. The initial step in managing jaundice in a newborn is to measure bilirubin levels, typically done using transcutaneous bilirubinometry. This measurement helps determine the severity of jaundice and guides appropriate treatment interventions. Evaluating cord blood Coombs test results or reviewing maternal medical records for blood type and Rh factor are not the immediate actions indicated when jaundice is suspected. Phototherapy may be considered after confirming elevated bilirubin levels and assessing the need for treatment.

5. Which physical assessment data should the nurse consider a normal finding for a primigravida client who is 12 hours postpartum?

Correct answer: C

Rationale: A pulse rate of 56 bpm is a normal finding for a primigravida client who is 12 hours postpartum. Bradycardia (pulse rate 50-70 bpm) can be a normal postpartum occurrence due to increased stroke volume and decreased cardiac output after delivery. Unilateral lower leg pain and saturating two perineal pads per hour are not normal findings and require further assessment. A soft, spongy fundus could indicate uterine atony, which is abnormal postpartum.

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