Standard Operating Procedure: Hematology Laboratory Operations

Standard Operating Procedure: Hematology Laboratory Operations

This document outlines the standardized procedures for hematology laboratory testing, including sample handling, instrument calibration, and quality control. It is designed to ensure consistency, accuracy, and regulatory compliance across all diagnostic hematology processes.

1. Purpose and Scope

This procedure applies to all [Laboratory Department Name] personnel involved in the collection, processing, and analysis of hematological specimens. The objective is to provide a reliable framework for complete blood counts (CBC), peripheral blood smears, and coagulation studies.

2. Specimen Collection and Handling

• Patient Identification: Verify patient identity using [Number of Identifiers] unique identifiers before collection.
• Tube Requirements: Use [Tube Type/Color Code] for all hematology specimens.
• Specimen Integrity: Ensure the specimen is properly labeled with [Patient Name], [Date of Birth], [Collection Time], and [Collector Initials].
• Storage: Maintain samples at [Temperature Range] if analysis is delayed beyond [Time Limit].

3. Instrument Calibration and Maintenance

• Daily Calibration: Perform automated calibration checks using [Calibration Material Name] at [Time].
• Maintenance Logs: Document all daily, weekly, and monthly maintenance tasks in the [Maintenance Log Name].
• Troubleshooting: If the analyzer flags an error, follow the [Manufacturer Name] manual protocols and document the resolution in the [Incident Report Form].

4. Quality Control (QC) Procedures

• QC Frequency: Run low, normal, and high control levels every [Number] hours or with every new reagent lot.
• Acceptance Criteria: Results must fall within [Number] standard deviations of the established mean.
• Corrective Action: If QC fails, do not report patient results. Notify [Supervisor Name] and repeat the QC process after troubleshooting.

5. Reporting and Documentation

• Critical Values: Immediately report results meeting [Critical Value Criteria] to the ordering physician at [Phone/Extension].
• Verification: Ensure all results are reviewed and signed off by [Authorized Personnel Title] before final release.
• Archiving: Store electronic records in [Database Name] and physical slides in the [Archive Location] for [Number] years.

Pro Tips

• Consistency: Always invert EDTA tubes 8–10 times immediately after collection to prevent micro-clotting.
• Safety: Wear appropriate Personal Protective Equipment (PPE), including [List PPE], at all times when handling biological samples.
• Verification: If an automated result is flagged for "manual review," perform a peripheral blood smear examination immediately to verify morphology.

Template Document: Standard Operating Procedure: Hematology Laboratory Operations

• Document owner: [Laboratory Management Team]
• Effective date: [Date]
• Version: [Version number]
• Applies to: [Hematology Laboratory Department]

Roles and responsibilities

Procedure

1. Verify the patient identity by checking the [Full name] and [Date of birth] against the laboratory requisition form. (Responsible: Laboratory Assistant)
2. Collect the blood specimen using a [Color] top vacuum tube containing [Anticoagulant type] to prevent clotting. (Responsible: Laboratory Assistant)
3. Inspect the specimen for the presence of clots or hemolysis before placing it into the analyzer. (Responsible: Laboratory Assistant)
4. Perform the daily startup sequence on the hematology analyzer to ensure all sensors are operating within [Threshold] limits. (Responsible: Medical Technologist)
5. Run the low, normal, and high level quality control materials to verify the precision of the instrument. (Responsible: Medical Technologist)
6. Load the patient samples into the analyzer sample rack and initiate the automated complete blood count analysis. (Responsible: Medical Technologist)
7. Review the generated histograms and scatterplots for any flags indicating abnormal cell populations or instrument errors. (Responsible: Medical Technologist)
8. Prepare a peripheral blood smear if the analyzer flags indicate the presence of [Cell type] or other abnormal morphology. (Responsible: Medical Technologist)
9. Document the final results into the laboratory information system and verify that all data matches the original request. (Responsible: Medical Technologist)
10. Archive the patient samples in the [Storage location] at [Temperature] for the duration of the required retention period. (Responsible: Laboratory Assistant)

Records and revision

• Prepared by: [Full name]
• Reviewed by: [Full name]
• Date completed: [Date]
• Signature: ______________________
• Date signed: [Date]

FAQ

What should I do if the hematology analyzer fails to calibrate?

Stop all patient testing immediately. Document the failure, notify the laboratory manager, and refer to the specific troubleshooting section of the instrument manual. Do not resume testing until the instrument passes calibration.

How often should the hematology laboratory undergo competency assessments?

Staff competency should be assessed upon initial hire, at six months, and annually thereafter, or whenever a new testing method or instrument is introduced.

What is the protocol for handling hemolyzed or clotted samples?

These samples are considered unacceptable for analysis. Reject the specimen, document the reason for rejection in [Laboratory Information System], and notify the clinical team to request a redraw.

How long must peripheral blood smears be retained?

Peripheral blood smears should be retained for a minimum of [Number] days or as dictated by your specific facility’s regulatory accreditation requirements.