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Proper usage
This page just gives an overview of the generator usage and administration of Techenegas to the patient.
Users should follow the details in the Package Insert for the Patient Administration Set (PAS) making reference to the Package Insert for the Pulmotec Crucible and the User-Manual of the Generator as required.
To produce Technegas a small crucible with a volume of 0,14ml, made of pure carbon is used.The crucible is single use only and may not be reused!One crucible for each patient-study is needed.
Remove the Pulmotec Crucible from its packaging using the forceps supplied with the Generator, and place it on a watch glass for suitable support.
Wet the well of the Pulmotec Crucible by filling with absolute or 95% ethyl alcohol using a 1 ml syringe. Draw back any excess ethanol with the same syringe leaving the Pulmotec Crucible wet with ethanol.
Pick up the wetted Pulmotec Crucible using the forceps holding them in the right hand with the forceps gripping the top and the bottom of the Pulmotec Crucible, not the sides. With a gloved left hand push the lever under the platform towards the back of the machine, thus opening the contacts. Place one end of the Pulmotec Crucible into the left hand contact and align the other end of the Pulmotec Crucible with the right hand contact. Slowly release the lever so that the right hand contact is made. Unless good contact is made a low Technegas yield may result. Rotate the Pulmotec Crucible gently backwards and forwards on its axis a few times to ensure good contact. Rotate the Pulmotec Crucible to ensure the well cavity is upright.
Load the Pulmotec Crucible with Tc-99m generator eluant (note the Pulmotec Crucible must still be wet from the ethanol before the Tc-99m is added -if not, repeat the wetting process), use a 1ml syringe with a suitable needle and ensure that no bubble of liquid rises above the top of the Pulmotec Crucible (maximum volume 140ul for standard Pulmotec Crucibles).
To close the drawer, press the Drawer Interlock Knob on the top FIRST, then the CLOSE button. Keep both depressed until the drawer is fully closed and the drawer light has gone out. If either is released before the drawer has stopped moving it will immediately re-open. This two handed operation is a safety precaution.
When START is pressed the chamber will be checked for correct sealing by a leak test, then the simmering, purging starts. This cycle is 6 minutes in length, indicated by a countdown time that is displayed during this stage.
The unit is now ready for the final stage of Technegas generation. Before proceeding further, position the patient ready for inhalation and open a fresh PAS beside them as reassurance. The patient must be familiar and comfortable with breathing through the mouthpiece while their nose is blocked with the clamp supplied. Press the START button now once again and the burn will commence, raising the Pulmotec Crucible temperature above 2700°C for 15 seconds. Your Technegas is now prepared and ready for inhalation by the patient. Refer to the Section of the User-Manual on Administration of Technegas.
