Implantable arterial catheter, especially multidose injection catheter

• US 4,685,905 A
• Filed: 05/19/1986
• Issued: 08/11/1987
• Est. Priority Date: 02/20/1986
• Status: Expired due to Fees

• Current Assignee: Clinical Plastic Products
• Original Assignee: Clinical Plastic Products
• Inventors: Jeanneret nee Aab, Hedwig
• Primary Examiner(s): Rosenbaum, C. Fred
• Assistant Examiner(s): Kartchner, Gene B.
• Application Number:
  US06/865,051
• Time in Patent Office: 449 Days
• Field of Search: 604/246, 604/247, 604/131, 604/132, 604/93, 604/27, 604/29, 604/30, 604/34, 604/48, 604/891, 604/181, 604/283, 604/280
• US Class Current: 604/247
• CPC Class Codes: A61M 25/0075 Valve means
• CPC Class Codes: A61M 39/0208 Subcutaneous access sites for injecting or removing fluids transcutaneous access sites A61M39/0247; implantable infusion devices A61M5/14276

Abstract

An implantable arterial catheter, especially a multidose catheter, comprises a multidose injection receptacle that includes a shell which bounds a chamber having an open end and has a fastening flange. A pierceable diaphragm spans the open end of the chamber to sealingly separate the chamber from the exterior of the shell. An elongated catheter tube has one end connected to the multidose injection receptacle and communicating with its chamber, and another end portion remote from the multidose injection receptacle. A safety valve is secured to the other end portion of the catheter tube and includes a conical tip component disposed at the other end portion of the catheter tube and having a flow orifice at the apex thereof, and a protective cap component surrounding the conical tip component and the other end portion of the catheter tube, secured to the catheter tube, and having a free end provided with an additional flow orifice.

Claims

1. An implantable arterial catheter, especially a multidose catheter, comprising in combination

a multidose injection receptacle including

a shell which bounds a chamber having an open end, and having an outlet port extending laterally from said shell and communicating with said chamber, said shell including an outwardly projecting fastening flange,

a piercable diaphragm spanning said open end of said chamber to sealingly separate the same from the exterior of the shell,

an elongated catheter tube having one end portion connected to said multidose infjection receptacle and communicating with said chamber through said laterally extending outlet port, and having another end portion remote from said multidose injection receptacle;

and

a safety valve secured to said other end portion of said catheter tube and including

an elongated conical tip component of a prearranged diameter disposed at said other end portion of said catheter tube, extending along a direction similar to that of said catheter tube, and having a flow orifice at an apex thereof,

a one-piece protective cap component of a predetermined diameter, and of paraboloidal shape surrounding said conical tip component and said other end portion of said catheter tube, being secured to said catheter tube, and having a free end provided with an additional flow orifice, said flow orifices extending coaxially along the aforesaid direction at a relatively small spacing from each other,

said conical tip component and said protective cap component having respective wall portions which bound the respective flow orifices and sealingly contact one another in the absence of a positive fluid pressure differential between the interior and the exterior of the respective component resulting from fluid passing from said outlet port through said catheter tube, but yielding to open the respective orifices sequentially so that the orifices form respective slot-like configurations in the presence of such positive pressure differential, while having a safe double return flow prevention effect when an administered fluid pressure is below a certain predetermined level, the so formed slots extending along said predetermined and prearranged diameters, but having lengths smaller than respective of said predetermined and prearranged diameters,

said protective cap component being slid onto and secured to said conical tip component, and including a paraboloidal cap head and a protective cap jacket formed with an outwardly arching, and peripherally extending fixation bulge, said protective cap jacket being adjacent to said paraboloidal cap head,

said conical tip component being formed of a material more yieldable than that of said protective cap component.

2. The catheter as defined in claim 1, wherein said conical tip component is glued to said catheter tube.

3. The catheter as defined in claim 1, wherein said conical tip component is vulcanized to said catheter tube.

4. The catheter as defined in claim 1, wherein said conical tip component is of one piece with said catheter tube.

5. The catheter as defined in claim 1, wherein said conical tip component and said protective cap component are made of respective synthetic plastic materials.