Intermediate
Technical
IVT
punch disc
A small circular section cut from a dried blood spot card for laboratory analysis.
Full Definition
A punch disc is a precisely cut circular piece of filter paper containing dried blood, typically 1/8 inch in diameter, that is punched from a newborn screening card for biochemical analysis. The standardized size ensures consistent specimen volume and reproducible test results. Multiple punch discs may be taken from a single blood spot for different assays.
Usage
Usage note: Always specify the diameter when describing punch discs in procedures.
In Context
- "The laboratory technician carefully placed the punch disc into the microplate well for amino acid analysis." — Laboratory procedure manual
- "Quality control requires that each punch disc be taken from the center of a well-saturated blood spot." — Technical guidelines
Also known as
blood spot punch
filter paper disc
Don't confuse with
whole card
blood spot