CATHETER PLACEMENT DEVICE

• US 3,630,198 A
• Filed: 06/23/1969
• Issued: 12/28/1971
• Est. Priority Date: 06/23/1969
• Status: Expired due to Term

• Current Assignee: Melvyn L. Henkin
• Original Assignee: Melvyn L. Henkin
• Inventors: Henkin, Melvyn L.
• Application Number:
  US04/835,560
• Time in Patent Office: 918 Days
• US Class Current: 604/170.01
• CPC Class Codes: A61M 25/065 Guide needles

Abstract

A catheter placement device including a Teflon catheter with an imperforate, generally hemispherical tip and two laterally opening ports adjacent the tip, the catheter being telescoped onto a cannula which bears against an annular internal shoulder behind the tip and communicates with the ports. The device is gripped by handles attached either directly to a hub on the cannula or to an adapter releasably connected to the hub, and is inserted through a shallow incision made with a disposable introducer formed in one piece with a troughlike pointed shank and an integral grip which centers the thrust of insertion on the shank. A capillary tube and a syringe are included as alternative sensing devices for communicating through the cannula with the ports to determine when a change in condition occurs during placement.

Claims

1. A catheter placement device having, in combination:

an elongated resiliently flexible plastic catheter having an imperforate tip at one end shaped for blunt dissection of tissue, a central passage extending through said catheter from the opposite end thereof to said tip, said passage terminating adjacent said tip in a transverse end wall, and at least one laterally opening port adjacent said tip communicating with said passage;

an elongated cannula disposed in said catheter in sliding, telescoped relation therewith and haviNg a transverse end surface engaging said end wall, the other end portion of said cannula projecting through said opposite end of the catheter;

means on said other cannula end forming a grip for said placement device whereby said imperforate tip is pressed through tissue by a force applied through the cannula against said transverse end wall; and

said cannula having a longitudinal passage opening through the transverse end surface thereof toward said end wall, and said port in said catheter being connected to said cannula passage by means including a connecting passage opening through the central portion of said end wall.

2. A catheter placement device having, in combination:

an elongated catheter having an imperforate rounded tip at one end, a longitudinal passage of preselected diameter extending through said catheter from the end thereof opposite said tip and terminating in a transverse end wall adjacent said tip, and a connecting passage extending from said end wall into said tip and opening laterally therefrom to form at least one port communicating through said connecting passage with said longitudinal passage;

an elongated cannula having an outside diameter approximately equal to said inside diameter, a longitudinal internal passage, and opposite ends through which the internal passage opens, said cannula being disposed within said catheter with a sliding fit with one of its ends abutting against said wall and with said internal passage communicating with said port through said connecting passage; and

means on the other end of said cannula forming a grip for said placement device whereby said tip is pressed through tissue by a force applied through said cannula and said end wall while said port remains in communication with said cannula passage.

3. A catheter placement device having, in combination:

an elongated resiliently flexible plastic catheter having an imperforate tip at one end shaped for blunt dissection of tissue, a central passage extending through said catheter from the opposite end thereof to said tip, said passage terminating adjacent said tip in a transverse end wall;

an elongated cannula disposed in said catheter in sliding, telescoped relation therewith and having a traverse end surface engaging said end wall, the other end portion of said cannula projecting through said opposite end of the catheter;

means on said other cannula end forming a grip for said placement device whereby said imperforate tip is pressed through tissue by a force applied through the cannula against said transverse end wall; and

two laterally opening ports formed on opposite sides of said catheter adjacent said tip at the opposite ends of a cross-passage through the catheter between said end wall and said tip, said cross-passage being connected to said catheter passage by a connecting port centrally located in said end wall to communicate with the interior of said cannula through said end surface thereof.

4. A catheter placement device as defined in claim 3 in which said tip is generally hemispherical in shape and said cross-passage is offset from the center of curvature toward said tip, said tip being thickened longitudinally of said cross-passage to a nearly rectangular shape to dispose said laterally opening ports in planes extending substantially longitudinally of said catheter.