Cleaning process for radiopharmaceutical reusable pigs
View Patent ↗A process for cleaning containers (pigs) in which radioactive drugs are shipped to health care providers, after than are returned to a pharmacy and may contain residual radioactive material, blood, microorganisms and other contaminants. Those pigs that are contaminated with radioactive material are removed from the cleaning process until they have decayed to the background radiation level. The upper and lower portions of each blood contaminated pig is disinfected. Each pig is washed at a temperature of at least 180° Fahrenheit for a least one minute to kill bacteria and viruses. The combination of a disinfectant and high washing temperature water provides an optimum level of sterilization.
1. A process for cleaning one or more spent radiopharmaceutical reusable pigs held in a transport box, each pig having a syringe or vial containment enclosure, comprising the steps of:
removing each pig from the transport box;
after removing all pigs from the transport box, scanning the box to detect the presence of radioactivity at a radiation level above background level;
upon detecting the presence of transport box radioactivity at said radiation level, storing the radioactive box until the radiation has decayed to background level;
disassembling each pig and emptying the contents thereof into a radiation attenuating containment vessel;
scanning each disassembled pig externally to detect the presence of radioactivity at a radiation level above background level;
upon detecting the presence of radioactive contamination of the pig at said radiation level, storing the radioactive pig until the radiation has decayed to background level;
scanning at least the lower portion of the syringe or vial containment enclosure of each pig utilizing a high sensitivity probe adjacent said lower portion to detect the presence of radioactivity emanating from inside the pig at a radiation level above background level;
upon detecting the presence of emanating radioactivity at said radiation level, storing the radioactive pig until the radiation has decayed to background level;
inspecting the pigs exhibiting radiation at background level for evidence of blood contamination;
disinfecting the spent pigs; and
washing all the pigs at a temperature of at least 180° Fahrenheit for at least one minute.
2. The process according to claim 1 , wherein said probe is substantially more sensitive than a Geiger-Muller probe attached to a survey meter.
3. The process according to claim 1 , wherein said probe is an NaI probe.
4. A process for cleaning a spent radiopharmaceutical reusable pig having a syringe or vial containment enclosure, comprising the steps of:
scanning the pig externally to detect the presence of radioactivity at a radiation level above background level;
upon detecting the presence of external pig radioactivity at said radiation level, storing the radioactive pig until the radiation has decayed to background level;
thereafter disassembling the pig and emptying the contents thereof into a radiation attenuating containment vessel;
scanning at least the syringe or vial containment enclosure of the disassembled pig utilizing a high sensitivity probe adjacent the enclosure to detect the presence of radioactivity inside the pig at a radiation level above background level;
upon detecting the presence of pig radioactivity emanating from said enclosure at said radiation level, storing the radioactive pig until the radiation has decayed to background level;
inspecting the pig exhibiting radiation at background level for evidence of blood contamination;
disinfecting the pig by exposing it to a disinfectant chemical; and
washing the pig.
5. The process according to claim 4 , wherein said washing step is carried out at a temperature of at least 180° Fahrenheit for at least one minute.
6. The process according to claim 4 , wherein said probe is connected to a scintillation detector.
7. The process according to claim 4 , wherein said probe is capable of detecting radioactivity emanating from within the shield of the pig.
8. A process for cleaning a radiopharmaceutical reusable pig having a syringe or vial containment enclosure, comprising the steps of:
scanning the pig externally and at least the lower portion of the syringe containment enclosure internally to detect the presence of radioactivity at a radiation level above background level;
upon detecting the presence of radioactivity at said radiation level, causing said pig to cease exhibiting said radioactivity;
disinfecting the pig; and
washing the disinfected pig at a temperature of at least 180° Fahrenheit for at least one minute.
9. The process according to claim 8 , wherein said pig is caused to cease exhibiting said radioactivity by storing the radioactive pig until the radiation has decayed to background level as determined by a high sensitivity radioactivity detection device.
10. The process according to claim 9 , wherein said radioactivity detection device includes a photomultiplier tube.
11. A process for cleaning a radiopharmaceutical reusable pig having a syringe or vial containment enclosure, comprising the steps of:
scanning the pig externally and at least the lower portion of the syringe containment enclosure internally to detect the presence of radioactivity at a radiation level above background level;
upon detecting the presence of radioactivity at said radiation level, causing said pig to cease exhibiting said radioactivity; and
washing the pig at a sufficiently high temperature for a sufficiently long time to destroy any microorganisms and remove any blood contamination from said pig.