# K021987: Parcomplast Compensating Filter for Radiation Therapy

- Pathway: 510(k) (Traditional)
- Applicant: S&S Par Scientific
- Decided: Dec 27, 2002 after 192 days
- Product code: IXI (Block, Beam-Shaping, Radiation Therapy)
- Device class: 2
- Regulation: 21 CFR 892.5710
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 1 generation back to K000137 (2000). 2 ancestors in all.
16 later devices descend from it; 1 cites it directly.
0 of 19 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K000137: Enhanced Compensating Filter, Computerized Medical Systems, Inc. (2000)
- K010172: Lead Blocks, Arplay Medical S.A. (2001) Summary page 1.

## Most influential descendants
- K040804: .Decimal Tissue Compensator/Intensity Modulator (2004), 15 descendants of its own
- K071078: .Decimal Range Compensator (2007), 9 descendants of its own
- K091911: Bolus Compensator (2009), 5 descendants of its own
- K071077: .Decimal Aperture (2007), 4 descendants of its own
- K214093: VSP Bolus (2022), 2 descendants of its own

## Indications for use
To shape the beam from a radiation therapy source.

Source page: https://510kreport.com/device/K021987
Methodology: https://510kreport.com/methodology