# K061737: Loss of Resistance Syringe

- Pathway: 510(k) (Traditional)
- Applicant: Robert Busse & Co., Inc.
- Decided: Dec 18, 2006 after 181 days
- Product code: CAZ (Anesthesia Conduction Kit)
- Device class: 2
- Regulation: 21 CFR 868.5140
- 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 K925902 (1993). 1 ancestor in all.
4 later devices descend from it; 4 cite 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)
- K925902: B-D Loss of Resistance Syringe, Bd Becton Dickinson Vacutainer Systems Preanalytic (1993) Summary page 1.

## Most influential descendants
- K190345: VPC (2019), 1 descendant of its own
- K261372: Profoject™ LOR Syringe (2026), 0 descendants of its own
- K201356: Plastic LOR Syringe (2021), 0 descendants of its own
- K080804: Busse Plastic Lor Syringe (2008), 0 descendants of its own

## Indications for use
The Busse Loss of Resistance Syringe is intended for use in conjunction with an epidural needle, to verify the needle tip placement in the epidural space by the loss of Resistance technique, it will be filled with air and/or saline during use. The loss of Resistance Syringe is not intended for injection or aspiration. The Syringe will be sold sterile individually packaged, and as part of a sterile kit.

Source page: https://510kreport.com/device/K061737
Methodology: https://510kreport.com/methodology