Term
| So you've treated a patient with I-131. What must you do before you can discharge the patient? |
|
Definition
- Confine pt until dose to a member of the public will not exceed 0.5 rem (5 mSv).
- You can calculate dose estimation based on tissue shielding and biological clearance.
- Must retain documentation for 3 years.
|
|
|
Term
| You've given a nursing mother Tc-99m MDP (bonescan) or Tc99m MIBI (cardiac). How long must they interrupt breastfeeding? |
|
Definition
|
|
Term
| A nursing mother gets Tc99m-MAA for a VQ scan. How long should they interrupt breastfeeding? |
|
Definition
|
|
Term
| A nursing mother gets a thallium myocardial stress test. How long must they stop breastfeeding for? |
|
Definition
|
|
Term
| A pt gets I-131 for a thyroid scan. How long before they can resume breastfeeding? |
|
Definition
Must cease nursing.
For I-131 > 0.4 microCuries.
Duke 2009 |
|
|
Term
| What is the general regulatory requirement for radiopharmaceutical administration and nursing women? |
|
Definition
Interrupt nursing if the dose to the infant could exceed 100 mrem.
10 CFR 35.75 |
|
|
Term
You give oral Na131I to a patient and find out 3 hours later she is 5 weeks pregnant. You should immediately (CHOOSE ONE):
- Give SSKI to block fetal thyroid
- IV fluids, encourage frequent voiding
- Induce vomiting, then send to ED for gastric lavage.
|
|
Definition
Answer: 2. IV fluids, encourage frequent voiding. Will reduce gamma dose to infant.
Fetal thyroid doesn't take up iodine before 10-12 weeks.
Already absorbed after 1-2 hours. |
|
|
Term
True or False, which of these is a reportable "medical event":
- Wrong patient
- Wrong radiopharmaceutical
- Wrong route of administration
- Administered activity > 20% of prescribed
- Unintended administration to fetus if fetal dose > 10 rem.
|
|
Definition
Answer:
#1-4 TRUE only if also: EDE > 5 rem or organ dose > 50 rem
#5 FALSE: Report if fetal dose > 5 rem. |
|
|
Term
| What's the criteria for Minor and Major Spill of Tc-99m and Thallium-201? |
|
Definition
Both:
Minor < 100 mCi
Major > 100 mCi |
|
|
Term
| What's the criteria for Minor and Major Spill of Ga-67, In-111, I-123, and Sm-153? |
|
Definition
Minor < 10 mCi
Major > 10 mCi |
|
|
Term
| What's the criteria for Minor and Major Spill of I-131, P-32, and Sr-89? |
|
Definition
Minor < 1 mCi
Major > 1 mCi |
|
|
Term
| You spill 30 mCi of Tc-99m MIBI on the floor. What do you do? |
|
Definition
This is a Minor Spill. So you would
- Notify persons in the area about the spill.
- Cover spill with absorbent paper to contain it.
- Put on gloves, lab coat, and booties. Clean up with the paper, carefully folding it and place in a labeled bag and everything into the radioactive waste container.
- Survey the area with a counter, check hands, clothing, shoes for contamination.
- Report to Radiation Safety Officer.
|
|
|
Term
| You spill 5 mCi of NaI-131 on the floor. What do you do? |
|
Definition
This is a Major Spill. You would:
- Vacate everybody from the room.
- Cover spill with absorbent paper labeled "Caution Radioactive Material". Fence off the area, and isolate those people who may be contaminated.
- Notify Radiation Safety Officer immediately.
- Decontaminate personnel by removing clothing, flushing skin with lukewarm water and mild soap.
- DO NOT TRY TO CLEAN IT UP YOURSELF.
|
|
|
Term
| What is the DOT White Triangle I Package Label supposed to indicate? |
|
Definition
Exposure of < 0.5 mR/hr on contact.
Transport Index negligible at 1 meter.
|
|
|
Term
| What is the DOT Yellow II Package Label supposed to indicate? |
|
Definition
Exposure < 50 mR/hr on contact
Transport Index < 1 mR/hr at 1 meter |
|
|
Term
| What is the DOT Yellow Triangle III Package Label supposed to indicate? |
|
Definition
Exposure < 200 mR/hr on contact
Transport Index < 10 mR/hr at 1 meter |
|
|
Term
| What are the steps to open a package containing radioactivity? |
|
Definition
- Put on gloves.
- Visually inspect for damage, if so notify RSO.
- Check external surfaces with survey meter.
- Open outer and inner packages, verifying with packing slip.
- Check source container for damage or leaks, if so notify RSO.
- Do a wipe test if contamination is suspected.
- Monitor empty packaging for contamination with survey meter before discarding.
- Either treat as radioactive waste, if not then obliterate labels before discarding.
- Make a record of the receipt.
|
|
|
Term
| What are the three key points to remember when returning a used generator back to the manufacturer? |
|
Definition
Save the original box (DOT-approved container).
Wipe test everything.
Retain records of receipts and transfers for 3 years. |
|
|
Term
| How often should you check Constancy? |
|
Definition
|
|
Term
| How often should you check Linearity on a dose calibrator? |
|
Definition
| Upon installation or after repair, then QUARTERLY. |
|
|
Term
| How often should you check Accuracy? |
|
Definition
| Upon installation or after repair, then ANNUALLY. |
|
|
Term
| What's the annual radiation dose limit for Radiation Workers? |
|
Definition
5 rem - whole body
15 rem - lens of eye
50 rem - extremities |
|
|
Term
| What's the annual radiation dose limit for the general public, not including medical procedures? |
|
Definition
0.5 rem whole body
5 rem lens of eye
5 rem extremities |
|
|
Term
| What's the annual radiation dose limit to the fetus? |
|
Definition
0.5 rem.
or 50 mrem/month |
|
|
Term
| What's the allowable limit on Moly breakthrough for a Tc-99m generator and when do you measure it? |
|
Definition
< 0.15 microCurie Mo-99 per milliCurie Tc-99m
measured on the FIRST eluate after receipt of the generator. |
|
|
