US 5,215,528 A · Catheter introducer assembly including needle tip shield

Abstract

An assembly for introducing a catheter into a blood vessel is provided. The assembly includes a needle hub having a needle secured thereto. The needle includes an elongate shaft having a bevelled tip. A portion of the needle shaft adjacent to the tip has a relatively large outside diameter. The shaft diameter of this portion exceeds the diameter, of the shaft portion adjoining the tip and the diameter of the shaft portion extending between the enlarged shaft portion and the needle hub. A catheter is mounted over the shaft of the needle, and includes an inner surface which bears against the enlarged shaft portion. A substantially leak-proof seal is thereby provided between the catheter and the needle shaft. A needle tip cover is slidably mounted to the needle shaft and is engageable with the enlarged portion of the shaft to prevent its removal therefrom. The catheter is releasably mounted to the needle tip cover.

Claims18

Dependent claims

A catheter introducing device comprising:

a needle,
a catheter tube mounted over the needle and slidable on the needle;
a needle hub, the needle comprising an elongate shaft, a needle tip, a first shaft portion adjoining the needle hub, a second shaft portion adjoining the tip and a third shaft portion between the first and second shaft portions, wherein the third shaft portion has an outside diameter larger than the outside diameters of the first and second shaft portions, wherein the outside diameter of the third shaft portion is such that the third shaft portion does not substantially hinder the passage of the needle and catheter tube into and out of a vessel, and further wherein the catheter tube is slidable on the shaft over the third shaft portion.

Dependencies are inferred from the claim text.

Catheter introducer assembly including needle tip shield

Life of this patent

Catheter introducer assembly including needle tip shield

Life of this patent

Abstract

Claims18