Intermediate
Technical
IVT
repeat screen
A second screening test performed due to early collection timing or borderline initial results.
Full Definition
Additional screening performed when the initial sample was collected too early (typically before 24 hours of age), yielded borderline results, or was otherwise compromised. Repeat screens help ensure accurate detection while minimizing false positives due to physiological immaturity. The timing and criteria for repeat screening vary by condition and program protocol.
Usage
Usage note: Distinguish from recollection due to specimen quality issues.
In Context
- "A repeat screen is recommended for samples collected before 24 hours of age." — Laboratory protocol guidelines
- "The repeat screen normalized, avoiding unnecessary specialist referral." — Case outcome report
Also known as
second screen
follow-up screen
Contrasted with
initial screen
primary screen
Don't confuse with
confirmatory testing
recollection