Over-the-needle catheter

United States Patent im

Dickerson et al.

mini

US005533988A

[ii] Patent Number: [45] Date of Patent:

5,533,988 Jul. 9, 1996

[54] OVER-THE-NEEDLE CATHETER

[75] Inventors: Charles W. Dickerson, Tustin; Richard A. Overton, Santa Ana; Ronald B. Luther, Newport Beach, all of Calif.

[73] Assignee: Luther Medical Products, Inc., Tustin, Calif.

[21] Appl. No.: 294,634

[22] Filed: Aug. 23, 1994

Related U.S. Application Data

Continuation-in-part of Ser. No. 254,133, Jim. 6, 1994.

Int. CI.6 A61M 25/16

U.S. CI 604/282; 604/280

Field of Search 604/282, 281,

604/280

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OTHER PUBLICATIONS

Landmark Venous Access Device, Menlo Care, Inc., 2 pages (no date).

Primary Examiner—Paul J. Hirsch

Attorney, Agent, or Firm—Stetina Brunda & Buyan

[57] ABSTRACT

A catheter has an abutment member formed proximate the distal end thereof. The abutment member abuts a complimentary abutment surface formed upon an introducer so as to prevent collapsing of the catheter body during the insertion process. The abutment member preferably comprises an annular abutment shoulder, which reduces the diameter of the lumen of the catheter. An opening formed in the catheter body proximate the tip of the catheter facilitates fluid flow through the lumen of the catheter in the event that the reduced diameter portion of the lumen becomes obstructed. The tip of the catheter preferably comprises a rigid material, so as to assure positive locking action of the abutment member of the catheter with the abutment surface of the introducer during the insertion process.

4 Claims, 2 Drawing Sheets

Page 2

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