The analytical phase is rarely the problem
A routine haemogram takes about a minute on the analyser. A biochemistry panel takes somewhat longer. Yet the patient receives the report six hours after giving the sample, and sometimes the next day.
The gap is almost entirely pre-analytical and post-analytical. Samples wait to be collected from the counter. They wait for a batch to fill. They wait for the technologist finishing a different department. Results wait for verification because the pathologist is seeing patients until four. Verified reports wait to be printed, sorted and handed over.
If you want to reduce turnaround meaningfully, measure where the time goes before changing anything. Most labs are surprised by the answer.
Waiting for verification is usually the largest block
In most labs the single biggest delay is the gap between a result being entered and a pathologist verifying it. Not because verification is slow — it takes seconds — but because it happens in sittings. Results accumulate through the morning and get verified in a block at two o'clock.
The fix is rarely to ask the pathologist to verify more often. It is to make verification possible from anywhere, so it can happen in the gaps rather than requiring a dedicated sitting at a particular desk. A pathologist who can verify twenty reports from their phone between consultations removes hours from the average.
It also helps enormously if the reports need less scrutiny. When indices are auto-calculated and ranges are applied automatically, verification becomes a clinical review rather than an arithmetic check, and it goes considerably faster.
Delivery is where the last hours disappear
A report verified at four in the afternoon that the patient collects at eleven the next morning has a turnaround of nineteen hours, of which nineteen minutes were laboratory work.
Digital delivery collapses this. The report reaches the patient at four o'clock, which is when it was actually ready. For labs that measure turnaround from sample to patient rather than sample to verification, this is usually the single largest improvement available.
It also removes the asymmetry where reports finished on Saturday evening reach patients on Monday. Delivery that does not depend on the counter being open does not care what day it is.
What to measure
Measure these four intervals separately, for a fortnight, before making any changes. Whichever is largest is where your effort belongs.
- Collection to receipt at the bench — usually short in-house, long for collection centres
- Receipt to result entry — the analytical phase, usually the smallest
- Result entry to verification — frequently the largest single block
- Verification to patient receipt — often large and almost entirely recoverable
The unglamorous wins
Batching less aggressively costs reagent efficiency and buys turnaround. Whether that trade is worth it depends on your volumes and your reagent economics, but it is worth calculating rather than assuming.
Setting explicit TAT targets per test and showing overdue samples on a worklist changes behaviour more than most process redesigns. People respond to a visible list of things that are late.
And defining critical values properly, with an escalation path that does not depend on someone noticing, matters more than average turnaround. The average is a business metric. A critical potassium sitting unverified for three hours is a clinical one.