# K971336: Caird Technology Spirometer

- Pathway: 510(k) (Traditional)
- Applicant: Caird Technology
- Decided: Dec 1, 1998 after 600 days
- Product code: BZG (Spirometer, Diagnostic)
- Device class: 2
- Regulation: 21 CFR 868.1840
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
28 later devices descend from it; 5 cite it directly.
0 of 29 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. FDA’s file for it is a 510(k) statement, which names no predicate.

## Most influential descendants
- K050074: 12-Lead Resting Electrocardiograph, Models CP100 & CP200 (2005), 12 descendants of its own
- K060167: Atria 3100, Atria 6100 (2006), 11 descendants of its own
- K052158: Welch Allyn Cardioperfect Workstation Version 1.5.0 Software (2005), 10 descendants of its own
- K160876: PC ECG (2017), 8 descendants of its own
- K082478: Welch Allyn Cardioperfect Workstation Software (CPWS)  V 1.62 (2009), 4 descendants of its own

## Indications for use
Designed for Adult and Pediatric Patients. For Hospital and Clinic use only. For Prescription use only. Some of the conditions for use are as follows: Shortness of Breath Chronic Cough Occupational Exposure to Dust or Chemicals Assist in the Diagnosis of Bronchitis Assist in the Diagnosis of Asthma Wheezing Assist in the monitoring of Bronodialators

Source page: https://510kreport.com/device/K971336
Methodology: https://510kreport.com/methodology