Outcome 7 Flashcards
what are the two uses of the eluate?
1) patient studies in present form
2) to make other radiopharm kits
what are two examples of each of the two uses?
patient studies - thyroid scans and gated cardiac
radiopharm kits - MDP and Sestamibi
what are the three methods in calculating activity for kits?
- back decay method
- educated guess method
- maximum kit activity method
which is the easiest method to calculate activity for kits?
maximum kit activity method
what are the pro(s) and con(s) to the back decay method?
pro - most accurate way
cons - only good if you don’t have any “extra” pertechnetate
what are the pro(s) and con(s) to the educated guess method?
pro - practical method
con - risk running out of activity
what are the pro(s) and con(s) to the maximum kit activity method?
pro - when patients require the same radiopharm and good for when your lab is super busy
what are the six “rights”?
- patient
- radiopharmaceutical (i.e. medication)
- dose (activity)
- route
- time
- documentation
what is a bolus?
fast injection
how do you perform a bolus?
- larger needle size
- iv line or butterfly
- flush with saline
- low vol dose
what are the different methods of administration?
- IV injection
- oral
- inhalation
- intrathecal
- instillation
- subcutaneous
- intradermal
what is intrathecal?
injection directly into the CSF and done by physicians
what is instillation?
slowly giving radiopharm into body cavity
what is the difference between subcutaneous and intradermal?
subcutaneous = under skin
intradermal = in between skin layers
what are the most common ways of administration?
IV injections, oral and inhalation
what is minimum dose in terms of paediatric doses?
smallest amount of activity that will give quality images
*higher doses WILL NOT necessarily = better images
what is maximum dose in terms of paediatric doses?
based on patient safety
dependent on the method used to adjust the dose – max dose may be the adult dose or lower
what are the two methods used to adjust paediatric doses?
- clark’s rule
- body surface area (bsa) based adjustments
what is clark’s rule?
dose activity = (patient’s weight (kg) divided by standard adult weight (70 kg))* adult dose
what is the max dose using the clark’s rule?
same as adult dose (i.e. for peds that weigh 70 kg or more)
what is the minimum dose using clark’s rule?
it’s set by the hospital
how do you use the bsa method?
- body surface is estimated based on weight
- use of table to determine percentage or fraction of an adult dose
what is the max dose using the bsa method?
same as adult dose
what is the minimum dose using the bsa method?
there is no minimum dose
due to the high variability in peds doses, what was formed?
- North American consensus guidelines for paediatric dose
- image gently campaign
