Multi-mode cannulating apparatus

• US 4,016,879 A
• Filed: 04/07/1975
• Issued: 04/12/1977
• Est. Priority Date: 08/22/1973
• Status: Expired due to Term

• Current Assignee: The Whitaker Corporation (Meggitt PLC)
• Original Assignee: Dynasciences Corp. (Meggitt PLC)
• Inventors: Mellor, Eli K.
• Primary Examiner(s): Truluck, Dalton L.
• Application Number:
  US05/565,436
• Time in Patent Office: 736 Days
• Field of Search: 128/214.4, 128/221, 128/347, 128/348, 128/DIG. 16
• US Class Current: 604/27
• CPC Class Codes: A61M 2025/0266 using pads, patches, tapes or the like
• CPC Class Codes: A61M 25/02 Holding devices, e.g. on the body
• CPC Class Codes: A61M 39/0606 without means for adjusting the seal opening or pressure A61M39/0693 takes precedence
• CPC Class Codes: A61M 5/1582 Double lumen needles

Abstract

Multiple mode cannulating apparatus is provided wherein in a versatile Y-shaped needle assembly an elastomer plug cooperates with stub tubings to define a Y-shaped port and passage junction of improved design; also, a blood cavity is provided in a carrier removably attached to the apparatus rearwardly of the plug, a cavity image enlarging means is employed; laminar flow junctions are provided at the stub tubings; and the apparatus may be used in both single and two needle dialysis modes.

Claims

1. In cannulating apparatus, the combination comprising:

a. an axially extending tubular body defining a blood flow passage and having a forward stem portion insertible into a blood vessel, said body defining two side ports and including two stub ducts defining forwardly tapering bores communicating at their forward ends with said side ports for conducting blood flowing between said passage and auxiliary tubing connectible at rearward ends of said ducts, said body also defining a rear port in alignment with said axis,

b. an elastomer plug carried by said body in alignment with said rear port and projecting to the junction of said side ports and said flow passage, said plug defining forwardly tapering inner wall portions of said side ports,

c. rearwardly removable structure extending axially within said passage and axially through said plug, said structure having a vessel puncturing forward tip, and

d. said side ports intersecting said passage at a location relatively close to the forward end of said stem portion.

2. The apparatus of claim 1 including tubing connected with at least one said stub duct, said tubing and stub duct having bores which are equal at the junction therebetween.