One Step™ Centesis Catheter
The One-StepTM is available in luer locking and slip fit configurations. The new Valved One-Step has an integrated self sealing valve which minimizes the risk of air infiltration and fluid leakage during centesis procedures, while the smooth transition eases insertion.
Valved One-Step Brochure
Features Include:
- The valve may be opened utilizing a needle or luer to adapt to your drainage needs
- The valve fully opens to allow maximum drainage
- Available with luer locking needle or slip fit needle
- Four large holes spiral around catheter to maximize drainage*
- Clear needle hub increases flashback while being ergonomic for easy gripping and handling
- Tapered tip provides excellent transition for smooth catheter introduction and less patient discomfort
- FEP material resists buckling and facilitates a smooth insertion
- Echoenhanced needle increases needle visibility for more accurate placement
- Vent plug allows for air to exit and added safety for physician
*sold with and without side holes
| One-Step Catalog Number |
French Size |
Catheter Length |
Valve |
Needle to Catheter Connection |
| OSC-4F-7T |
4 |
7cm |
Yes |
Slip Fit |
| OSC-4F-10T |
4 |
10cm |
Yes |
Slip Fit |
| OSC-5F-7T |
5 |
7cm |
Yes |
Slip Fit |
| OSC-5F-10T |
5 |
10cm |
Yes |
Slip Fit |
| OSC-5F-15T |
5 |
15cm |
Yes |
Slip Fit |
| OSC-4F-7S |
4 |
7cm |
No |
Slip Fit |
| OSC-4F-10S |
4 |
10cm |
No |
Slip Fit |
| OSC-5F-7S |
5 |
7cm |
No |
Slip Fit |
| OSC-5F-10S |
5 |
10cm |
No |
Slip Fit |
| OSC-5F-15S |
5 |
15cm |
No |
Slip Fit |
| OSC-4F-7L |
4 |
7cm |
No |
Luer Lock |
| OSC-4F-10L |
4 |
10cm |
No |
Luer Lock |
| OSC-5F-7L |
5 |
7cm |
No |
Luer Lock |
| OSC-5F-10L |
5 |
10cm |
No |
Luer Lock |
| OSC-5F-15L |
5 |
15cm |
No |
Luer Lock |
To find out more, please contact a local Merit sales representative.

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