System for generating and containerizing radioisotopes

• US 4,833,329 A
• Filed: 11/20/1987
• Issued: 05/23/1989
• Est. Priority Date: 11/20/1987
• Status: Expired due to Fees

• Current Assignee: Mallinckrodt Medical Inc. (Mallinckrodt plc)
• Original Assignee: Mallinckrodt Incorporated (Mallinckrodt plc)
• Inventors: Wong, David M., Quint, Randall H., Swenson, Richard F.
• Primary Examiner(s): Anderson, Bruce C.
• Assistant Examiner(s): Berman, Jack I.
• Application Number:
  US07/123,586
• Time in Patent Office: 550 Days
• Field of Search: 250/432 PD, 250/430, 141/305, 251/9, 137/573, 137/614.11
• US Class Current: 250/432.0PD
• CPC Class Codes: G21G 1/0005 Isotope delivery systems use of radioisotopes as tracers G21H5/02
• CPC Class Codes: G21G 4/08 specially adapted for medical application radiation therapy using radioactive sources A61N5/10
• CPC Class Codes: Y10T 137/86204 Fluid progresses by zigzag flow
• CPC Class Codes: Y10T 137/87981 Common actuator

Abstract

A system for eluting a daughter radioisotope from a parent radioisotope and containerizing the resultant eluate in an evacuated container having a rubber stopper, providing for delivery of eluant from a reservoir through a tube to a generator containing the parent radioisotope, for venting of the reservoir to atmosphere via a tube, and for delivery of eluate from the generator via a tube to a tubular needle pierced through the stopper, with a cam-controlled hinged pinch plate for pinching the tubes closed.

Claims

1. A system for eluting a daughter radioisotope from a parent radioisotope and for containerizing the resultant eluate in an evacuated container having a closure adapted to be pierced by a tubular needle, said system comprising:

a generator containing a supply of the parent radioisotope, said generator having an inlet for an eluant for eluting the daughter radioisotope from the parent radioisotope and an outlet for the resultant eluate;

a reservoir for holding a supply of the eluant, said reservoir having an outlet for delivery of eluant to the inlet of the generator and an air inlet for admission to the reservoir of air from the atmosphere to apply atmospheric air pressure to eluant in the reservoir;

a tubular needle for piercing the closure of the evacuated container;

a first flexible tube connected to the air inlet of the reservoir and in communication with the atmosphere uptream from the reservoir;

a second flexible tube interconnecting the outlet of the reservoir and the inlet of the generator;

a third flexible tube interconnecting the outlet of the generator and the tubular needle;

each of said tubes being resiliently compressible and thereby adapted to be pinched for closing it;

and valve means for pinching the tubes to close them and operable on entry of the tubular needle through the closure of an evacuated container into the container to open the tubes for venting the reservoir to atmosphere via the first tube, for delivery of eluant from the reservoir to the generator via the second tube, and for delivery of eluate from the generator via the third tube to the needle and thence to the container;

wherein said valve means comprises;

a body having spaced side walls and being open at one edge of said walls;

each side wall having a slot therein extending from said edge thereof;

the first, second and third tubes being received in the slots in the side walls one on another with portions of the tubes extending from wall-to-wall;

the body having a back-up for said portions of the tubes against which the tubes may be pinched for closing them; and

means carried by the body movable between a tube-pinching position wherein the tubes are pinched closed against said back-up and a retracted position for releasing the tubes to open them and operable on piercing of the closure of an evacuated container by the needle to open the tubes for the delivery of eluant into the container.

2. A system as set forth in claim 1 wherein said tube-pinching means comprises a pinch member mounted on one of the side walls extending toward the other side wall and swingable toward and away from the back-up, and means movably associated with the body for swinging the pinch member into pressure engagement with said portions of the tubes to pinch them against said back-up and for releasing the pinch member to allow it to swing away from said portion of the tubes to allow them to open up.

3. A system as set forth in claim 2 wherein said means for swinging the pinch member comprises a cam means rotary with respect to the body.

4. A system as set forth in claim 2 wherein said pinch member comprises a plate having an edge portion received in a groove in said one side wall of the head and an integral hinge adjacent said edge portion.

5. A system as set forth in claim 4 wherein said means for swinging the plate comprises a cam means rotary with respect to the body.

6. A system as set forth in claim 3 wherein the cam means comprises a shaft rotary at one end in a bearing on the body, said shaft having a cam thereon which engages the pinch member.

7. A system as set forth in claim 6 wherein the shaft has means thereon overlying the open ends of the slots for retaining the tubes in the slots.

8. A system as set forth in claim 7 wherein the shaft and bearing have snap-fit means for holding the shaft in the bearing.

9. A system for eluting a daughter radioisotope from a parent radioisotope and for containerizing the resultant eluate in an evacuated container having a closure adapted to be pierced by a tubular needle, said system comprising:

a generator containing a supply of the parent radioisotope, said generator having an inlet for an eluant for eluting the daughter radioisotope from the parent radioisotope and an outlet for the resultant eluate;

a reservoir for holding a supply of the eluant, said reservoir having an outlet for delivery of eluant to the inlet of the generator and an air inlet for admission to the reservoir of air from the atmosphere to apply atmospheric air pressure to eluant in the reservoir;

a tubular needle for piercing the closure of an evacuated container;

a first flexible tube connected to the air inlet of the reservoir and in communication with the atmosphere upstream from the reservoir;

a second flexible tube interconnecting the outlet of the reservoir and the inlet of the generator;

a third flexible tube interconnecting the outlet of the generator and the tubular needle;

each of said tubes being resiliently compressible and thereby adapted to be pinched for closing it;

and valve means for pinching the tubes to close them and operable on entry of the tubular needle through the closure of an evacuated container into the container to open the tubes for venting the reservoir to atmosphere via the first tube, for delivery of eluant from the reservoir to the generator via the second tube, and for delivery of eluate from the generator via the third tube to the needle and thence to the container;

wherein said valve means comprises;

a body comprising a stem having an uper end and a lower end, the needle extending down from the lower end of the stem;

a head at the upper end of the stem having a bottom and spaced side walls extending up from the bottom;

the body being movable down from a raised retracted position for causing the needle to pierce the closure of an evacuated container placed below the lower end of the needle;

each side wall of the head having a slot therein extending down from the top of the wall;

the first, second and third tubes being received in the slots in the side walls one on another with portions of the tubes extending across the head;

the head having a back-up for the portions of the tubes extending across the head against which the tubes may be pinched for closing them; and

means in the head movable between a tube-pinching position wherein the tubes are pinched closed against said back-up and a retracted position for releasing the tubes to open them and operable on downward movement of the stem to drive the needle through the closure of an evacuated container to open the tubes for the delivery of eluant into the container.

10. A system as set forth in claim 9 wherein said tube-pinching means comprises a pinch member mounted at one of the side walls of the head extending toward the other side wall and swingable toward and away from the back-up, and means movable in the head for swinging the pinch member into pressure engagement with the portions of the tubes extending across the head to pinch them against said back-up and for releasing the pinch member to allow it to swing away from said portion of the tubes to allow them to open up.

11. A system as set forth in claim 10 wherein said means for swinging the pinch member comprises a cam means rotary in the head and a knob above the head for rotating the cam means.

12. A system as set forth in claim 10 wherein said pinch member comprises a plate having an edge portion received in a groove in said one side wall of the head and an integral hinge adjacent said edge portion.

13. A system as set forth in claim 12 wherein said means for swinging the plate comprises a cam means rotary in the head and a knob above the head for rotating the cam means.

14. A system as set forth in claim 9 wherein said stem is tubular and has a slot extending lengthwise thereof terminating short of its lower end, the said third tube extending from the head through said slot in the stem to the interior of the stem and connected therein for communication with the upper end of the tubular needle.

15. A system as set forth in claim 14 wherein said tube-pinching means comprises a pinch member mounted at one of the side walls of the head extending toward the other side wall and swingable toward and away from the back-up, and means movable in the head for swinging the pinch member into pressure engagement with the portions of the tubes extending across the head to pinch them against said back-up and for releasing the pinch member to allow it to swing away from said portion of the tubes to allow them to open up.

16. A system as set forth in claim 15 wherein said means for swinging the pinch member comprises a cam means rotary in the head and a knob above the head for rotating the cam means.

17. A system as set forth in claim 15 wherein said pinch member comprises a plate having an edge portion received in a groove in said one side wall of the head and an integral hinge adjacent said edge portion.

18. A system as set forth in claim 17 wherein said means for swinging the plate comprises a cam means rotary in the head and a knob above the head for rotating the cam means.

19. A system as set forth in claim 11 wherein the cam means comprises a shaft extending down in the head rotary at its lower end in a bearing in the head, said shaft having a cam thereon above the bearing engageable with the pinch member.

20. A system as set forth in claim 19 wherein the shaft has means thereon overlying the upper ends of the slots for retaining the tubes in the slots, and wherein the shaft and bearing have snap-fit means for holding the shaft in the bearing.