# K032951: Chrono-Log Whole Blood Aggregometer, Models 591A and 592A

- Pathway: 510(k) (Traditional)
- Applicant: Chrono-Log Corp.
- Decided: Apr 2, 2004 after 193 days
- Product code: JOZ (System, Automated Platelet Aggregation)
- Device class: 2
- Regulation: 21 CFR 864.5700
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 2 generations back to K830749 (1983). 3 ancestors in all.
3 later devices descend from it; 1 cites it directly.
0 of 7 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K962426: Chrono-Log Whole Blood Aggregometer (Wba) 591/592, Chrono-Log Corp. (1996) Summary page 1.

## Most influential descendants
- K050265: Chrono-Log Whole Blood Lumi-Aggregometer, Model 700 (2005), 2 descendants of its own
- K161329: Chrono-log Platelet Aggregometer, 4 channel; Chrono-log Platelet Aggregometer, 8 channel (2016), 0 descendants of its own
- K103555: Multiplate 5.0 Aggregometer (2012), 0 descendants of its own

## Indications for use
For Platelet Function testing of Whole Blood specimens using Impedance Aggregometry.

Source page: https://510kreport.com/device/K032951
Methodology: https://510kreport.com/methodology