Standard Operating Procedure: Blood Bank Operations and Transfusion Safety

This Standard Operating Procedure (SOP) outlines the mandatory protocols for the safe management, storage, processing, and distribution of blood and blood components within the facility. Adherence to these guidelines is critical to ensuring patient safety, minimizing the risk of transfusion-transmitted infections, and maintaining compliance with regulatory standards (such as AABB or ISO 15189). All personnel handling blood products must demonstrate competency in these procedures and maintain rigorous documentation practices.

1. Donor Screening and Blood Collection

• Verification: Confirm donor identity using government-issued photo identification.
• Health History: Administer a comprehensive health questionnaire to identify risk factors for infectious diseases or medical contraindications.
• Physical Exam: Record vital signs (blood pressure, pulse, temperature) and perform a rapid hemoglobin/hematocrit screen.
• Phlebotomy: Utilize aseptic techniques to perform venipuncture. Ensure all collection bags are properly labeled with unique donor identification numbers (DIN).
• Post-Collection: Monitor the donor for adverse reactions (fainting, hematoma) before discharge.

2. Laboratory Testing and Component Processing

• Infectious Disease Testing: Perform mandatory screening for HBV, HCV, HIV, Syphilis, and West Nile Virus using FDA-approved nucleic acid testing (NAT) and serological assays.
• Blood Typing: Conduct ABO/Rh grouping on both the donor unit and patient sample.
• Antibody Screening: Perform unexpected antibody screening on patient serum to prevent delayed hemolytic reactions.
• Component Separation: Use a refrigerated centrifuge to separate whole blood into packed red blood cells (PRBCs), platelets, and fresh frozen plasma (FFP) within the required timeframe (typically 8 hours for FFP).
• Labeling: Apply ISBT 128 compliant labels to all final components, ensuring the presence of the DIN, expiration date, blood type, and special testing results (e.g., CMV negative, leukoreduced).

3. Storage and Inventory Management

• Temperature Monitoring: Maintain continuous, automated temperature logging for all storage units (PRBCs at 1–6°C; Platelets at 20–24°C with agitation; Plasma at ≤-18°C).
• Alarm Calibration: Ensure audible and visual alarms are functional and set to trigger at ±1°C of the limit; conduct monthly alarm testing.
• FIFO Protocol: Strictly adhere to "First-In, First-Out" inventory rotation to minimize product expiration and wastage.
• Quarantine Procedures: Immediately isolate any products that fail testing or are subject to recall in a dedicated, locked "Quarantine" refrigerator/freezer.

4. Transfusion Administration and Patient Safety

• Patient Verification: Conduct a "two-person" bedside verification process matching the patient’s ID wristband to the blood bag tag and the laboratory cross-match report.
• Pre-Transfusion Vitals: Record baseline vital signs immediately prior to initiation.
• Monitoring: Observe the patient for the first 15 minutes of the infusion, as this is the highest risk window for acute hemolytic or anaphylactic reactions.
• Documentation: Record the start time, end time, unit volume, and any adverse reactions in the patient’s Electronic Health Record (EHR).

Pro Tips & Pitfalls

Pro Tips

• Real-time Documentation: Use barcode scanning technology at every step of the chain of custody to prevent clerical errors—the leading cause of transfusion-related mortality.
• Contingency Planning: Maintain an emergency "O-Negative" refrigerator strictly for Massive Transfusion Protocols (MTP) to ensure immediate availability during trauma.
• Temperature Mapping: Conduct annual temperature mapping of storage units to identify "hot" or "cold" spots caused by airflow obstruction.

Pitfalls to Avoid

• Sample Labeling Errors: Never pre-label patient tubes. Always label tubes at the bedside immediately after venipuncture to avoid "wrong blood in tube" (WBIT) errors.
• Ignoring Alarms: Never silence a temperature alarm without investigating and documenting the cause (e.g., door left ajar, power fluctuation).
• Storage Clutter: Overcrowding storage units prevents air circulation and leads to uneven cooling, which can compromise product shelf-life.

Frequently Asked Questions (FAQ)

Q: What is the primary procedure if an alarm triggers in the blood refrigerator overnight? A: Follow the "Out-of-Range Temperature Protocol." First, verify the actual internal temperature using a calibrated thermometer. If the product is compromised, move the units to a backup validated refrigerator and log the incident in the Quality Assurance (QA) log for investigation.

Q: How often must equipment such as centrifuges and refrigerators be calibrated? A: Equipment must be calibrated annually or according to the manufacturer’s specifications, whichever is more frequent. Additionally, calibration must occur after any significant maintenance or hardware repair.

Q: What constitutes a "transfusion reaction," and what is the first step when one is suspected? A: A reaction includes fever, chills, rash, dyspnea, or flank pain. If suspected, immediately stop the transfusion, maintain venous access with saline, notify the attending physician and the blood bank, and return the blood unit and all associated tubing to the laboratory for investigation.