Browse Prior Art Database

Dual Catheter Assembly

IP.com Disclosure Number: IPCOM000086401D
Original Publication Date: 1976-Sep-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Kruger, VR: AUTHOR

Abstract

This dual catheter assembly allows for the use of a single venipuncture to obtain the same continuous flow blood processing as the two-venipuncture procedure without the inherent psychological problems of long-term immobilization of both arms during a device/donor procedure.

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Dual Catheter Assembly

This dual catheter assembly allows for the use of a single venipuncture to obtain the same continuous flow blood processing as the two-venipuncture procedure without the inherent psychological problems of long-term immobilization of both arms during a device/donor procedure.

Figs. 1a, 1b and 2 show the cross sections of the components and the two- piece assembly. The components consist of a large internal diameter catheter 1 (e.g., 14 gauge), an associated inner needle 3, fluid flow plug 5, a connector (or similar device) 7 that houses a smaller gauge catheter 9, a thin flexible sheath 11, and sterility plugs or caps 13, 15 and 17. This combination permits sterile insertion or extension of the small gauge catheter, and allows for two fluid-flow paths (one inside the small gauge catheter).

The venipuncture procedure, once the venipuncture area has been prepared properly, is as follows;
1. Insert the larger internal catheter assembly (inner needle and

fluid-flow plug in place) into the vein.
2. Investigate the validity of venipuncture.
3. Remove the inner needle and fluid-flow plug.
4. Insert the preprimed (physiological saline) connector assembly

into the hub of the larger bore needle hub (connector assembly

may also attach over needle hub).
5. Once the connector assembly is attached, the smaller gauge

catheter is pushed forward through the remaining portion of

the connector assembly, then through the larger gauge catheter

until fully insert...