Question

When injecting Tc99m MAA, which of the following are true?

a. it is best not to withdraw blood into the syringe before injection
b. the patient should be supine
c. the RP should be gently aggitated before injection
d. all of the above
e. a and b only

Answer 1

When injecting Tc99m MAA, it is indeed true not to withdraw blood into the syringe before injection and to gently agitate the radiopharmaceutical before use. Positioning of the patient is not necessarily supine but depends on the procedure.

Step-by-step explanation:

When injecting Tc99m MAA, it is true that:

• (a) It is best not to withdraw blood into the syringe before injection. Withdrawing blood can cause clumping or agglutination of the radiopharmaceutical, which can alter its distribution and efficacy.
• (c) The radiopharmaceutical should be gently agitated before injection to ensure a homogenous suspension, as MAA particles tend to settle at the bottom if the syringe is left standing for some time.

However, the patient's position (supine or otherwise) is not specified in the options as a generalized truth since the patient positioning can depend on the specific procedure being done. Therefore, the correct answer to the question is that both (a) and (c) are true, making (d) 'all of the above' the accurate choice if assuming the procedure typically requires a supine patient.

Answer 2

Answer:A

Because the A because it's explanation