Haematology & Immunohaematology — NABL criteria
NABL 112A, section 7.3 — Technical Requirements, Discipline Wise
Checked against NABL 112A (Issue 01, 18-Dec-2024) · page updated 23 September 2026
These are the requirements NABL applies specifically to Haematology & Immunohaematology, quoted from NABL 112A. They sit on top of the general requirements every accredited laboratory must meet, not instead of them.
What NABL 112A requires of this discipline
- For Monitoring of Heparin either by APTT or Anti- Xa and for LMWH the time of sample collection shall be documented (ideally between 3-5 hours after the administration of the dose) since the processing of the sample and separation of the plasma shall be done within 1 hour of sample collection.
- Complete Blood Count (CBC) specimens shall be checked for clots in samples where there is thrombocytopenia (visually, by applicator sticks, or by automated analyser histogram inspection or flags), before reporting results.
- If the laboratory is processing samples over 24 hours but within 48 hours adequate documentation of the stability study shall be available.
- Packed Cell Volume Determination: The centrifuge shall be calibrated and capable of reaching at least 10000g for 5 minutes.
- ESR: Westergren or an equivalent method approved by ICSH or CLSI (Formerly NCCLS) shall be followed.
- White blood cell count: The haemocytometer shall be examined regularly to ensure that the lines are bright and free from scratch marks and dust particles.
- The correct standard thickness cover slips shall be used.
- The diluting fluid shall be filtered before use and checked periodically for background count.
- Platelet poor plasma shall be made in a centrifuge spun at 1500 to 2000g (Speed mentioned is in “g” & not rpm) for 15 minutes to achieve a platelet count of <10000 per µl.
Showing 9 of 21 discipline-specific requirements identified in section 7.3. Read the full section in the official document before an assessment — this page is a guide to it, not a replacement for it.
Verbatim excerpts from NABL 112A - Specific Criteria for Accreditation of Medical Laboratories, Issue 01, 18-Dec-2024, section 7 (Technical Requirements - Discipline Wise). Downloaded from nabl-india.org 2026-09-23. Download the current version from NABL →
Records this discipline still has to produce
The discipline criteria above are additional. Every accredited laboratory, in every discipline, must still maintain the general record set:
- NABL Internal Audit Checklist for Medical Laboratories
- Internal Quality Control (IQC) Record and Levey–Jennings Chart
- EQA / Proficiency Testing Participation Record
- Method Verification Record
- Method Validation Record
- Measurement Uncertainty (MU) Record
- Comparability of Results Record
- Quality Indicators Record
- Sample Rejection Log and Rejection Criteria
- Primary Sample Collection Manual
Other disciplines
- Clinical Biochemistry Cl. 7.1
- Clinical Pathology Cl. 7.2
- Microbiology & Infectious Disease Serology Cl. 7.4
- Histopathology Cl. 7.5
- Cytopathology Cl. 7.6
- Flow Cytometry Cl. 7.7
- Molecular Diagnostics Cl. 7.8
- Histocompatibility and Immunogenetics Cl. 7.9
- Cytogenetics Cl. 7.10
- Point of Care Testing (POCT) Cl. 7.11
HealthFlow is not NABL accredited and is not an accreditation body. Using it does not make a laboratory accredited or compliant. These pages describe what the standard requires; meeting it is the laboratory's own responsibility.
What the software contributes is evidence produced by normal work: turnaround time measured per test, reports versioned and locked on authorisation with dual signatures, every report access written to an append-only audit trail enforced at the database and retained two years, and full export whenever you want it.