Hematology & Blood Transfusion Protocols: Nursing Masterclass

Anemia is a pathological reduction in circulating red blood cells (RBCs), hemoglobin concentration, or hematocrit, resulting in diminished oxygen-carrying capacity and tissue hypoxia. Common manifestations across all anemias include fatigue, pallor, tachycardia, shortness of breath, and exercise intolerance.

Major Anemia Types & Nursing Considerations

• Iron Deficiency Anemia: The most common nutritional anemia worldwide. Caused by inadequate dietary intake, chronic blood loss (e.g., GI bleed, heavy menstruation), or malabsorption. Nursing Care: Administer oral iron supplements (ferrous sulfate) between meals with Vitamin C (ascorbic acid) to enhance absorption. Inform the client that stool will turn dark green or black. Liquid iron stains teeth; administer via straw and brush teeth afterward.
• Pernicious Anemia (Vitamin B12 Deficiency): Caused by a lack of intrinsic factor secreted by gastric parietal cells, preventing absorption of Vitamin B12 in the terminal ileum. Manifests with macrocytic RBCs and neurological symptoms (paresthesias, ataxia, smooth beefy red tongue). Nursing Care: Life-long monthly intramuscular (IM) Vitamin B12 injections.
• Sickle Cell Anemia: An inherited autosomal recessive disorder where abnormal hemoglobin (HbS) causes RBCs to sickle under hypoxic conditions, leading to microvascular occlusion, severe ischemic pain, and hemolysis. Nursing Care: During a vaso-occlusive crisis, priority interventions include aggressive IV hydration (reduces blood viscosity), supplemental oxygen, and scheduled opioid pain management.

Disseminated Intravascular Coagulation (DIC) is a complex, life-threatening condition where the clotting cascade is massively activated throughout the microvascular system. Microthrombi form in small vessels, causing ischemic organ damage while concurrently exhausting available platelets and clotting factors. This paradoxically results in severe, uncontrollable systemic hemorrhage.

Common Triggers: Sepsis (especially gram-negative), severe trauma, abruptio placentae, acute malignancies, and incompatible blood transfusions.

Hallmark Lab Findings: Prolonged PT, PTT, and thrombin time; decreased fibrinogen levels; decreased platelet counts; and elevated D-dimer (indicating excessive fibrinolysis).

Nursing Management: Treat the underlying trigger (e.g., antibiotics for sepsis), monitor strict intake and output, assess for bleeding from venipuncture sites, gums, and surgical incisions, and administer prescribed blood components (platelets, fresh frozen plasma, cryoprecipitate) to restore clotting factors.

Blood component therapy replaces specific blood constituents tailored to the client's clinical deficit. Nurses must understand the unique characteristics and infusion requirements of each product:

• Packed Red Blood Cells (PRBCs): Used to restore oxygen-carrying capacity in hemorrhage, surgery, and severe anemia. Infused over 2 to 4 hours per unit.
• Platelets: Used to treat thrombocytopenia and active bleeding or prior to invasive procedures. Infused rapidly over 15 to 30 minutes using a special platelet administration set.
• Fresh Frozen Plasma (FFP): Contains clotting factors used to treat coagulation deficiencies and reverse warfarin overdose. Thawed in the blood bank and infused as quickly as tolerated within 30 to 60 minutes.
• Cryoprecipitate: Derived from FFP, rich in fibrinogen and Factor VIII, used for hemophilia and hypofibrinogenemia.

Administering blood products requires meticulous adherence to safety protocols to prevent fatal hemolytic transfusion reactions. Nurses must follow these mandatory steps:

1. Verify that a valid informed consent form is signed and placed in the medical record.
2. Ensure a large-bore peripheral IV line (18-gauge or 20-gauge preferred) is established and patent. Use 0.9% Normal Saline only to prime and flush blood administration tubing; never mix dextrose or lactated Ringer's with blood products (dextrose causes hemolysis; LR contains calcium which can cause clotting).
3. Obtain baseline vital signs immediately before starting the infusion.
4. Two-Nurse Bedside Verification: Two licensed nurses must independently check the blood bag against the client's identification wristband and blood bank compatibility label. Verify: client name, medical record number, blood type and Rh factor, unit barcode number, and expiration date.
5. Initiate the infusion slowly during the first 15 minutes (no more than 5 mL/min or 50 mL/hr) while remaining at the bedside to monitor for acute reactions.
6. Obtain vital signs 15 minutes after initiation, then hourly until 1 hour post-transfusion completion.
7. Complete the infusion of a single unit of PRBCs within a maximum of 4 hours.

If a client exhibits signs of a transfusion reaction during or after administration, the nurse must execute emergency protocol immediately.

Types of Transfusion Reactions

• Acute Hemolytic Reaction: Caused by ABO incompatibility. Manifests as fever, chills, low back pain, chest tightness, tachycardia, hypotension, and hemoglobinuria. Life-threatening.
• Febrile Non-Hemolytic Reaction: The most common reaction. Caused by antibodies against donor leukocytes. Manifests as sudden fever, chills, and headache. Treated with antipyretics.
• Allergic Reaction: Sensitivity to donor plasma proteins. Manifests as urticaria (hives), pruritus, flushing, and mild wheezing. Treated with antihistamines (diphenhydramine).
• Circulatory Overload (TACO): Caused by infusing blood too rapidly. Manifests as dyspnea, orthopnea, crackles, hypertension, and distended neck veins. Treated with diuretics and slower infusion rates.