# K962223: Water Chambers for ST 3000 Heated Humidifier

- Pathway: 510(k) (Traditional)
- Applicant: Marquest Medical Products, Inc.
- Decided: Jan 14, 1997 after 218 days
- Product code: BTT (Humidifier, Respiratory Gas, (Direct Patient Interface))
- Device class: 2
- Regulation: 21 CFR 868.5450
- 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 K850647 (1985). 4 ancestors in all.
1 later device descends from it; 1 cites it directly.
0 of 6 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K864173: HPD Humidifying Chamber, Hpd Medical, Inc. (1987) Summary page 1.
- K850647: Heated Respiratory Humififier MR440, Fisher & Paykel Allied Products, Ltd. (1985) Summary page 1.
- K862923: MR620 Dual Servo Heated Anaesthesia Humidifier, Fisher & Paykel Allied Products, Ltd. (1986) Summary page 1.
- K934140: MR290 Humidification Chamber Single Use, Fisher & Paykel Electronics, Ltd. (1994) Summary page 1.

## Cited in the summary but kept off the family tree
- K903138: Marquest SCT 3000, Heated Humidification System, Marquest Medical Products, Inc. (1990). Not matched in our reading of the summary (scans can blur digits), so it is kept off the family tree

## Most influential descendants
- K993282: Ipi Humidifier Chamber (2000), 0 descendants of its own

## Indications for use
The humidifier chambers for the SCT 3000 are indicated for use with the SCT 3000 unit and to hold water required to humidify the air being delivered to patients.

Source page: https://510kreport.com/device/K962223
Methodology: https://510kreport.com/methodology