Conversion kit for a machine for automatic intravascular injection of solutions

• US 5,792,102 A
• Filed: 11/19/1996
• Issued: 08/11/1998
• Est. Priority Date: 01/28/1994
• Status: Expired due to Fees

• Current Assignee: Mallinckrodt Medical Inc. (Mallinckrodt plc)
• Original Assignee: Mallinckrodt Medical Inc. (Mallinckrodt plc)
• Inventors: Muller-Spath, Reinhard
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): Lewis, William W.
• Application Number:
  US08/687,464
• Time in Patent Office: 630 Days
• Field of Search: 604/141, 604/143, 604/144, 604/152, 604/154, 604/155, 604/70, 604/71, 604/39, 604/97, 604/98, 604/283
• US Class Current: 604/70
• CPC Class Codes: A61M 5/14546 Front-loading type injectors

Abstract

The present invention relates to a conversion kit for converting a machine designed for intravascular injection of solutions, such as parenteral solutions, using high-pressure syringes, to a machine that can be used for injection using smaller manual syringes. The conversion kit, includes at least one conversion vessel (13) for releasable but substantially non-rotary reception of a high-pressure syringe with a cylindrical guide (19) formed through a receiving head (14) of the conversion vessel (13) and a recess (17) formed in the upper surface of the receiving head (14). The recess (17) may also receive the radial end regions of wing extensions of a manual syringe of predetermined size. The conversion kit also includes at least one reducing sleeve (23) for reducing the effective inner diameter of the guide (19), the reducing sleeve (23) adapted to snugly receive the outer diameter of a manual syringe (12). The reducing sleeve also includes a peripheral edge (26) which is adapted to be received in the recess (17). The conversion kit also includes at least one conversion piston holder (29), with a maximum diameter equal to or less than the diameter of the piston (11) of the manual syringe (12), the conversion piston holder (29) being equipped with a mechanism (30) for releasably securing it to the free end of a spindle (10) of the machine and with a coupling head (31) for coupling the conversion piston holder (29) to the piston of a high-pressure syringe or for applying injection pressure to the piston (11) of the manual syringe (12).

Claims

1. A conversion kit for a machine for intravascular injection of solutions from high-pressure syringes, the machine including a vessel for releasably holding a high-pressure syringe and a power-driven retractable and extendable spindle for moving a piston of a high-pressure syringe and provided with a piston holder for coupling with said high-pressure syringe;

said conversion kit, providing means to equip said machine for use with either high-pressure syringes or for use with manual syringes of a predetermined size;

said conversion kit comprising;

at least one conversion vessel for replacing said conversion vessel of said machine and for releasably holding a high-pressure syringe, said conversion vessel having

a receiving head provided with a cylindrical guide for tightly surrounding the distal end region of the body of said high-pressure syringe; and

a first radial recess formed in the upper surface of said receiving head, for substantially non-rotary reception of a peripheral edge projecting from the distal end of the body of said high-pressure syringe;

at least one reducing sleeve for reducing the effective inner diameter of said cylindrical guide, said reducing sleeve including;

a substantially cylindrical sleeve member having an outer diameter dimensioned to fit snugly within the inner diameter of said guide and having an inner diameter dimensioned to snugly receive the outer diameter of the body of a manual syringe;

a peripheral edge radially projecting from the distal end of said reducing sleeve, and adapted to be received said first recess in said receiving head; and

a second recess formed in an upper surface of said reducing sleeve and adapted to receive a distal peripheral edge of said manual syringe; and

at least one conversion piston holder for replacing said piston holder of said machine having a maximum diameter which is equal to or less than the diameter of a piston of said manual syringe, said conversion piston holder including

means for releasably securing a first end of said conversion piston holder to the free end of said spindle; and

a coupling head adapted to selectively couple said conversion piston holder to a piston of a high-pressure syringe or to contact and apply injection pressure to a piston of a manual syringe.

2. A conversion kit according to claim 1, wherein the maximum diameter of said peripheral edge of said manual syringe is equal to or less than the diameter of said guide.

3. A conversion kit according to claim 1, wherein said peripheral edge of said manual syringe includes wing extensions having a maximum diameter of greater than the diameter of said guide, and wherein said first recess in said head includes a first region for receiving said peripheral edge said high-pressure syringe, and a second region for receiving end regions of said wing extensions of said manual syringe.

4. A conversion kit according to claim 1, further including a resilient projection extending around the inner periphery of said guide, and wherein said reducing sleeve includes a recess for receiving said resilient projection when said reducing member is inserted within said guide.

5. A conversion kit according to claim 4, wherein said resilient projection is an O-ring inserted into a groove formed on the inner periphery of said guide.

6. A conversion kit according to claim 1, wherein said peripheral edge of said reducing sleeve is adapted to be substantially non-rotatably received in said first recess in said receiving head.

7. A conversion kit according to claim 3, wherein said peripheral edge of said reducing sleeve includes peripheral edge recesses for receiving said wing extensions of said manual syringe.

8. A conversion kit according to claim 1, wherein said second recess in said reducing sleeve is adapted to substantially non-rotatably receive said peripheral edge of said manual syringe.

9. A conversion kit according to claim 1, wherein said manual syringe has a volume in the range of 30 ml to 50 ml, and wherein said high-pressure syringe has a volume in the range of 50 ml to 200 ml.

10. A conversion kit according to claim 1, wherein said manual syringe has a volume in the range of 1 ml to 50 ml, and wherein said high-pressure syringe has a volume in the range of 50 ml to 200 ml.

11. A conversion kit according claim 1, including more than on conversion vessel, more than one reducing sleeve and more than one conversion piston holder, and adapted to be used with a wide variety of manual syringes having different volumes.