Standard Operating Procedure: Blood Bank Operations

This Standard Operating Procedure (SOP) outlines the rigorous protocols required for the collection, testing, storage, and distribution of blood and blood components. The objective of this document is to ensure the safety, purity, and potency of all blood products, minimizing the risk of transfusion-transmitted infections and transfusion reactions. All personnel must strictly adhere to these guidelines to maintain compliance with regulatory standards (e.g., AABB, FDA, or local health authority guidelines) and to guarantee patient safety.

1. Donor Screening and Blood Collection

• Verification: Confirm the identity of the donor using a government-issued photo ID.
• Health History Questionnaire: Ensure the donor completes the medical history form accurately.
• Physical Screening: Measure hemoglobin/hematocrit levels, blood pressure, pulse, and temperature.
• Aseptic Technique: Perform venipuncture following strict aseptic standards to prevent microbial contamination.
• Labeling: Apply unique identifiers (barcodes/labels) to the collection bag, pilot tubes, and donor records immediately upon collection.

2. Laboratory Testing and Quality Control

• Infectious Disease Testing: Perform mandatory screening for HIV-1/2, Hepatitis B (HBV), Hepatitis C (HCV), Syphilis, and other region-specific endemic pathogens.
• Blood Grouping: Conduct ABO/Rh typing (forward and reverse grouping).
• Antibody Screening: Perform unexpected antibody screening on all donor units.
• Validation: Ensure all laboratory equipment is calibrated and reagents are within their expiration dates before starting test cycles.
• Documentation: Record all results in the Laboratory Information System (LIS).

3. Storage and Inventory Management

• Temperature Monitoring: Maintain continuous, automated 24/7 temperature monitoring for all blood storage units.
• Critical Limits:
  • Red Blood Cells: 1°C to 6°C.
  • Platelets: 20°C to 24°C with constant agitation.
  • Fresh Frozen Plasma (FFP): ≤ -18°C (or -30°C for long-term).
• Alarm Response: Respond to any temperature excursion alarm within 15 minutes and document corrective actions taken.
• Inventory Rotation: Adhere to the "First-In, First-Out" (FIFO) principle to prevent product expiration.

4. Distribution and Transfusion Logistics

• Requisition Review: Verify physician orders for blood components against patient medical records.
• Cross-Matching: Perform compatibility testing (cross-match) between donor units and patient samples.
• Final Verification: Perform a two-person verification process at the time of issue to match the unit label with the patient’s identification (Name, MRN, DOB).
• Chain of Custody: Document the time of release, temperature at release, and the identity of the person receiving the blood unit.

Pro Tips & Pitfalls

• Pro Tip: Implement a double-check "Stop Sign" system where two staff members must independently verify patient and unit barcodes before moving to the next task.
• Pro Tip: Automate your alarm system to send alerts to mobile devices to ensure rapid response to storage unit temperature fluctuations.
• Pitfall (Inadequate Labeling): Mislabeling remains the leading cause of fatal transfusion reactions. Never pre-label any blood unit; apply labels only after confirming data in the LIS.
• Pitfall (Environmental Distractions): Do not perform critical cross-matching or unit verification in high-traffic or noisy areas of the lab.

Frequently Asked Questions (FAQ)

Q: What should be done if a blood unit is stored outside the approved temperature range? A: Immediately quarantine the unit. Assess the duration of the excursion, consult the technical director, and refer to the facility's "Temperature Excursion Policy" to determine if the product must be discarded or if it can be salvaged.

Q: How often should blood bank equipment be calibrated? A: Calibration should occur according to the manufacturer’s specifications, typically annually, or immediately after any major maintenance, relocation of equipment, or evidence of performance drifting.

Q: What is the required procedure for a suspected transfusion reaction? A: Immediately stop the transfusion, maintain IV access with saline, notify the attending physician and the blood bank, and return the blood unit with the attached IV tubing and a fresh patient sample to the lab for investigation.