A 2-day-old infant diagnosed with severe erythroblastosis fetalis is admitted to the neonatal intensive care unit. The infant's bilirubin level is 22 mg/dL, and exchange transfusion is planned. What is the priority nursing intervention before the exchange transfusion procedure?
1Verify blood type compatibility and crossmatch results with another nurse✓ 정답
2Position the infant in a supine position with neck hyperextended
3Administer prophylactic antibiotics as prescribed
4Obtain baseline electrolyte levels and complete blood count
해설
Verifying blood type compatibility is the priority to prevent fatal transfusion reactions. Other actions are important but secondary to ensuring blood product safety.
Core Nursing ExplanationKey Concept Analysis: This question tests the priority nursing action before a critical procedure: an Exchange transfusion for a neonate with Erythroblastosis fetalis (Hemolytic disease of the newborn, HDN). The core theme is patient safety and the prevention of the most catastrophic complication: an acute hemolytic transfusion reaction. The pathophysiology involves maternal antibodies (often anti-D) crossing the placenta and destroying fetal red blood cells, leading to severe hyperbilirubinemia (bilirubin 22 mg/dL) and anemia. An exchange transfusion removes the infant's antibody-coated RBCs and bilirubin while replacing them with compatible donor blood.
Answer Rationale: Key Point! The single most critical safety step before administering any blood product is the verification of Blood type compatibility and crossmatch results. This is a universal, non-negotiable nursing responsibility. For an exchange transfusion, the stakes are even higher due to the large volume of blood being exchanged and the infant's fragile condition. A two-nurse verification (or per facility policy) is the standard of care to prevent clerical errors that could lead to a fatal ABO-incompatible transfusion. This action directly addresses the greatest and most immediate risk to the patient.
Distractor Analysis:
• Watch out for confusion! Option ②: Positioning the infant supine with neck hyperextended is not the standard position for an umbilical vessel catheterization (common access for exchange transfusion). The infant is typically placed supine with limbs restrained, but neck hyperextension is unnecessary and could compromise the airway. Proper positioning is important but not the priority before the procedure's safety check.
• Option ③: Administering prophylactic antibiotics is not a standard pre-procedure intervention for an exchange transfusion. Antibiotics are given for suspected or confirmed sepsis, not routinely for this procedure.
• Option ④: Obtaining baseline labs (electrolytes, CBC) is a correct and necessary action, as it provides crucial data for monitoring during and after the procedure. However, it is secondary to ensuring the blood product itself is safe to administer. You cannot safely proceed with incompatible blood, regardless of the lab values.
Related Concepts: This prioritization follows the Safety First principle and the "Five Rights" of medication (and blood) administration: Right patient, Right medication/blood, Right dose, Right route, Right time. Verification is the foundational step. Also, understand that in erythroblastosis fetalis, the exchanged blood must be Rh-negative and crossmatch-compatible with the mother's serum (which contains the harmful antibodies), not just the infant's blood type.
Concept Summary
• Erythroblastosis Fetalis (HDN): Caused by maternal-fetal blood group incompatibility (often Rh). Maternal IgG antibodies attack fetal RBCs.
• Exchange Transfusion Goal: Correct anemia, remove bilirubin (prevent kernicterus), and remove maternal antibodies.
• Pre-Procedure Priority: Ensure blood product safety via verification. All other preparations are secondary.
• Kernicterus: The feared complication of extreme hyperbilirubinemia, causing permanent neurological damage.
Side-by-Side Comparison!
Priority Action (Before Blood Admin)
Important but Secondary Actions
Verify blood type & crossmatch with another nurse
Obtain informed consent
Check patient ID against blood bag ID (Two identifiers)
Establish IV access / prepare equipment
Inspect blood product for abnormalities
Administer pre-medications (e.g., acetaminophen) if ordered
Ensure the "Five Rights"
Obtain baseline vital signs and labs
Anatomy, Physiology & Pharmacology Points
• Physiology: Bilirubin is a breakdown product of heme from RBCs. Unconjugated (indirect) bilirubin is fat-soluble and can cross the blood-brain barrier, causing neurotoxicity (kernicterus). The level of 22 mg/dL in a 2-day-old is critically high, necessitating aggressive treatment.
• Procedure Access: Exchange transfusion is typically performed via an Umbilical venous catheter (UVC).
• Pharmacology (Related): Intravenous immunoglobulin (IVIG) and Phototherapy are other treatments for HDN/hyperbilirubinemia, but are insufficient at this high bilirubin level.
Memory Tips
• Mnemonic for Pre-Transfusion: "Verify Before You Infuse" (V = Verify blood, B = Baseline vitals/labs, Y = Yourself & another nurse check, I = Infuse).
• Think: "Wrong blood = Worst outcome." The priority is always to prevent that outcome first.
High-Frequency NCLEX Topics
NCLEX heavily tests priority-setting and safety. Blood administration safety checks are a classic high-yield topic. Expect questions that ask for the "first," "priority," or "most important" action, where the answer is often the one that prevents immediate harm (like checking compatibility) over an action that is merely correct or part of the procedure.
Watch Out for Question Variations!
• Variation 1: "The nurse is preparing for an exchange transfusion. Which finding requires immediate intervention?" → Answer might be: "The blood product is 30 minutes past its arrival time and has been unrefrigerated."
• Variation 2: Shift from pre-procedure to intra-procedure priority: "During an exchange transfusion, the infant develops tachycardia and hypotension. What is the nurse's priority action?" → Answer: Stop the transfusion, maintain IV access with normal saline, and notify the provider (suspected transfusion reaction).
Nursing Clinical Practice GuideClinical Scenario: You are the NICU nurse assigned to Baby Girl Lopez, a 36-hour-old infant born to an Rh-negative mother. The infant is jaundiced, lethargic, and has a total serum bilirubin (TSB) of 22 mg/dL. A diagnosis of erythroblastosis fetalis is confirmed, and an exchange transfusion with O-negative, crossmatched packed RBCs is ordered.
Nursing Intervention Strategy:
1AssessmentPerform a thorough pre-procedure assessment: Neurological status (for signs of early kernicterus: lethargy, poor feeding, high-pitched cry), vital signs, hydration status, and confirm patency of the UVC.
2Safety Verification (PRIORITY)With another RN, perform the blood verification at the bedside. Check: Patient's ID band (name, medical record number), blood bag number, blood type (Rh factor), crossmatch report, and expiration date. Both nurses must sign the verification form.
3PreparationSet up the warmer for the blood product. Assemble the exchange transfusion set (often a "stopcock" system for simultaneous withdrawal and infusion). Ensure emergency equipment (code cart, medications) is readily available.
4Monitoring & ImplementationDuring the procedure, monitor vital signs (heart rate, respirations, blood pressure, oxygen saturation) every 5-15 minutes. Accurately document volumes of blood withdrawn and infused (usually in small aliquots). Observe for complications: apnea, bradycardia, hypocalcemia (from citrate in the blood), hypoglycemia, or transfusion reaction.
5Post-Procedure Care & EvaluationObtain a post-transfusion bilirubin and hematocrit level. Continue frequent neurological and vital sign assessments. Monitor the UVC site for bleeding or infection. Evaluate the effectiveness of the procedure by tracking the bilirubin trend.
Nursing Procedure & Medication FlowExchange Transfusion - Key Nursing Points:
• Blood Product: Use fresh (<5-7 days old) CPDA-packed RBCs to ensure low potassium and high 2,3-DPG levels. The blood is often irradiated to prevent graft-versus-host disease (GVHD) in neonates.
• Rate & Volume: The procedure is done slowly, exchanging small aliquots (e.g., 5-20 mL per cycle) over 1-2 hours. Total exchange volume is typically 2 times the infant's blood volume (approx. 85 mL/kg x 2).
• Medication Alert: Calcium gluconate may be administered during the procedure to counteract citrate-induced hypocalcemia. Monitor for signs of hypocalcemia: jitteriness, tetany, prolonged QT interval on ECG.
A Word from Your Senior Nurse
"In the high-stakes environment of the NICU, your vigilance is the infant's primary defense. An exchange transfusion is a life-saving but risky procedure. Never let the urgency of the situation make you skip the safety checks. That moment of double-checking the blood bag with your colleague is the most important nursing intervention you will perform. Remember, in nursing and on the NCLEX, the priority is always to prevent harm first. If you see a question about blood, think 'safety and verification' before anything else. You've got this!"
Erythroblastosis Fetalis — Hemolytic disease of the newborn (HDN) caused by maternal-fetal blood group incompatibility (e.g., Rh or ABO). Maternal IgG antibodies cross the placenta and destroy fetal red blood cells, leading to anemia, hyperbilirubinemia, and hydrops fetalis.
Exchange Transfusion — A procedure where an infant's blood is gradually removed and replaced with donor blood. Used to treat severe hyperbilirubinemia (to prevent kernicterus) and correct severe anemia while removing antibodies and bilirubin.
Kernicterus — A form of permanent brain damage caused by the deposition of unconjugated bilirubin in the basal ganglia and brainstem nuclei of newborns. Symptoms include lethargy, high-pitched cry, opisthotonos, and can lead to cerebral palsy, hearing loss, and intellectual disability.
Hyperbilirubinemia — An elevated level of bilirubin in the blood. In neonates, it is often "physiologic," but pathologic causes include hemolytic disease (like erythroblastosis fetalis), infection, or liver immaturity. Levels requiring intervention vary by infant age and risk factors.
Umbilical Venous Catheter — A central venous line inserted into the umbilical vein of a newborn. It provides secure vascular access for administration of fluids, medications, and blood products, and is the common route for performing exchange transfusions.