System for generating and containerizing radioisotopes

• US 4,296,785 A
• Filed: 07/09/1979
• Issued: 10/27/1981
• Est. Priority Date: 07/09/1979
• Status: Expired due to Term

• Current Assignee: Mallinckrodt Medical Inc. (Mallinckrodt plc)
• Original Assignee: Mallinckrodt Incorporated (Mallinckrodt plc)
• Inventors: Vitello, John P., Grummon, Glenn D.
• Primary Examiner(s): Schmidt, Frederick R.
• Application Number:
  US06/055,784
• Time in Patent Office: 841 Days
• Field of Search: 137/625.47, 128/272.3, 128/274, 128/214 B, 141/59, 141/10 D, 141/105, 141/107, 141/279, 141/284, 141/285, 141/301, 141/302, 141/305, 141/329, 141/392, 222/481, 222/481.5, 250/432 PD
• US Class Current: 141/105
• 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 137/86871 Plug

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 charge of the parent radioisotope in a generator and thence to a tubular needle adapted to be pierced through the stopper of the evacuated container for suctioning the eluant from the sealed eluant supply into the generator and for suctioning the resultant eluate into the container. The needle is at the lower end of a valve body having a valve plug rotatable therein between a closed and open position. The plug is adapted to be pushed down to push the valve body down to cause the needle to pierce the stopper, after which the plug is rotated to open position, in which it effects venting of the eluant reservoir to atmosphere, delivery of eluant from the reservoir to the generator, and delivery of eluate from the generator to the needle.

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 needle, said apparatus 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;

and valve means comprising a first port constituting an air inlet in communication with the atmosphere, a second port in communication with said reservoir air inlet, a third port interconnected with said reservoir outlet, a fourth port interconnected with said generator inlet, a fifth port interconnected with said generator outlet for delivery of eluate to the needle, and means for blocking communication between said first and second ports, between said third and fourth ports, and between said fifth port and the needle, and operable to place the first port in communication with the second, the third in communication with the fourth and the fifth in communication with the needle.

2. A system as set forth in claim 1 wherein said valve means comprises a valve body carrying the needle, means mounting the valve body for movement downwardly from a raised retracted position for causing the needle to pierce the closure of an evacuated container and for movement upwardly back to its raised retracted position, said ports being in the valve body, and said blocking means comprising a valve member movable with the valve body as it moves downwardly and upwardly and movable relative to the valve body between a first position wherein the second port is blocked from the first, the fourth from the third and the fifth from the needle and a second position wherein the first is in communication with the second, the third is in communication with the fourth and the fifth is in communication with the needle.

3. A system as set forth in claim 2 wherein said valve body has a cylindrical recess extending down from its upper end and a passage extending down from the recess to the lower end of the body, the needle being fitted at its upper end in said passage, said valve member comprising a plug having a rotary sealing fit in said recess and extending upwardly out of said recess, being movable downwardly to move the valve body downwardly for the needle to pierce the closure of an evacuated container and then being rotatable to its second position.

4. A system as set forth in claim 3 wherein the ports extend between the recess and a side of the valve body, with the ports arranged in a vertical series, the plug having a first groove for communication between the first and second ports, a second groove for communication between the third and fourth ports, and a third groove for communication between the fifth port and said passage when the plug is turned to said second position.

5. A system as set forth in claim 4 having means for preventing the plug from being turned from said first to said second position until said plug and valve body have been moved downwardly for the needle to pierce the closure of an evacuated container.

6. A system as set forth in claim 5 having means biasing the valve body and plug upwardly to said raised retracted position, said preventing means preventing the plug from being turned from first to second position until the plug and valve body have been moved downwardly and preventing the valve body and plug from moving upwardly until the plug has been turned back from second to first position.

7. A system as set forth in claim 6 wherein the plug is slidable in an opening in a wall and said preventing means comprises a key on the plug slidable in a notch which extends out from said opening, the upper end of the key being below said wall when the plug is moved downwardly for causing the needle to pierce the stopper of an evacuated container thereby to enable the plug to be turned from the first to the second position.

8. A system as set forth in claim 7 wherein the key is engageable with first and second stops below said wall for determining said first and second positions.

9. A system as set forth in claim 8 having means for guiding the valve body for up and down movement and holding it against rotation.

10. A system as set forth in claim 6 having a bacteriological filter in the first port, a flexible tube interconnecting the reservoir air inlet and the second port, a flexible tube interconnecting the reservoir outlet and the third port, a flexible tube interconnecting the fourth port and the generator inlet, and a flexible tube interconnecting the generator outlet and the fifth port.