Blood Group Discrepancy Records Assessors Can Trace

When forward and reverse grouping disagree, keep one linked record trail: specimen and donor or patient identifiers, the original reaction entries, method and reagent details, every repeat or additional test, the investigation notes, any referral, and the final authorised interpretation with the approver’s name, date and time. Preserve the first result instead of replacing it. An assessor should be able to start with one identifier and see what disagreed, who investigated it, which recorded evidence supported the conclusion and who closed the discrepancy.¹

Start with the statutory record

Schedule F Part XIIB requires ABO grouping by testing red cells with anti-A, anti-B and anti-AB sera and testing serum or plasma with known A, B and O cells.² Keeping only the final interpreted group loses the evidence that these two parts disagreed.

Section L lists master records for blood and its components among the records a licensee must maintain.³ Read alongside the current NABH standards on controlled testing, records and authorisation, that means your centre needs a recoverable chain from the original observations to the approved interpretation.¹

This is a documentation trail, not a clinical resolution protocol. Your approved SOP determines which investigation is performed and who may authorise the result.

Build one trail from detection to closure

Start a discrepancy record as soon as the disagreement is recognised. If your worksheet, instrument output, investigation form and final entry sit in separate files, give them the same case reference or link each one to the parent donor, patient, sample or unit identifier.

What matters is continuity. An assessor should not have to infer that an unattached repeat-test slip belongs to the initial worksheet because the handwriting looks similar.

Preserve the raw entries

Keep the original forward and reverse results

Record the observed reactions in the form defined by your SOP, including reaction grades or instrument output where applicable. A final group copied into the master record cannot show what triggered the investigation.

Where an analyser produces an output, retain or link that output to the case. For manual work, the worksheet should identify who performed the test and when, rather than relying on an unsigned result transferred later.

Record every repeat as a separate event

Each repeat needs its own specimen identity, observations, method or system, operator, date and time. When a different specimen is used, make that change visible so the assessor can distinguish repeat testing from a new collection.

A note saying repeated and confirmed hides the number of attempts, the material used and whether the same disagreement persisted. Avoid combining several runs into one retrospective entry.

Make the investigation note concise but complete

Your investigation note should state why the case was opened, which controlled SOP and version applied, what was performed, what evidence was considered and why the final interpretation followed. It does not need to reproduce the SOP.

A referral report, equipment record or reagent investigation can remain in its normal file if the discrepancy record carries a working link or reference. Where reagent traceability is involved, use the same lot-level discipline applied to TTI testing records.

Close with an authorised interpretation

Close the record with the final interpretation or documented status, the name or unique user ID of the authorised person, and the date and time of authorisation. If the investigation remains open, record that status under your SOP instead of leaving a blank final field.

Any later amendment should preserve the earlier value and identify who changed it, when and why. NABH’s current standards place document and record control, review and authorisation within the centre’s quality system.¹

Connect the SOP and exception records

Name the exact SOP and version used when the discrepancy was investigated. Your quality manual and SOP control should also show that this was the approved version on the date of testing.

If your quality system opens a nonconformity, incident or corrective-action record, cross-reference its number. Do not copy the complete investigation into two places, because one copy will eventually be amended while the other remains unchanged.

When equipment, quality control or a reagent lot becomes relevant, link the corresponding record. An assessor can then follow the evidence without searching several registers by date and guessing which entry belongs to the discrepancy.

Prevent silent changes in electronic records

For electronic records, check whether your system retains the original result, stores each repeat separately, attributes edits and records the reason for an amendment. Ask a user to retrieve a closed case and display its history without relying on the technician who performed it.

Those are the controls to examine when reviewing RAKT for compliance records or any other system. Software cannot reconstruct an initial worksheet, reaction entry or referral report that nobody captured.

Apply the correct retention rule

For donor-unit testing records, the licence condition in Rule 122G requires records to be maintained for five years from the date of manufacture.⁴ Schedule F Part XIIB section L separately says that the listed records must be kept for five years, but it does not name a start date.³

Map each part of the discrepancy trail to the applicable record category in your approved retention schedule. The blood bank record retention guide explains why the blood-centre provisions should not be replaced with a last-entry calculation borrowed from a different licence condition.

Keep attachments for as long as the parent record requires them. Retaining the final master entry while destroying the worksheet or instrument output leaves an incomplete trail during retrieval.

Run the assessor retrieval test

Pick one closed discrepancy and give a colleague only its donor, patient, sample or unit identifier. This is the same retrieval principle used for donor-to-recipient traceability, applied to the grouping investigation itself.

1. Find the original forward and reverse entries.
2. Identify what triggered the discrepancy record.
3. Place every repeat or additional entry in order.
4. Retrieve the relevant reagent, equipment and referral references.
5. Confirm the SOP version used on that date.
6. Find the documented rationale and final authorised interpretation.
7. Display any correction or amendment without losing the earlier value.

If your colleague needs a verbal explanation from the original technician, the written trail is incomplete. Fix the missing link before an assessor chooses the case, not while the assessor waits at the desk.

Sources

1. NABH Accreditation Standards for Blood Centres, current edition listed under the Blood Banks and Blood Centres Accreditation Programme nabh.co
2. Drugs and Cosmetics Rules, 1945, Schedule F Part XIIB, ABO grouping and testing provisions cdsco.gov.in
3. Drugs and Cosmetics Rules, 1945, Schedule F Part XIIB, section L cdsco.gov.in
4. Drugs and Cosmetics Rules, 1945, Rule 122G cdsco.gov.in