In-111 Oxine

Question 1

T1/2 of In-111

Answer 1

67.4 hrs

Question 2

energies of In-111

Answer 2

171 keV and 247 keV

Question 3

decays via

Answer 3

electron caption

Question 4

In-111 Oxine is mixed w/ leukocytes and _______ pass through_____ into ______ where ________ displace In-111 from oxine causing _______

Answer 4

chelates, cell membrane, cytoplasm, proteins, permanently bound isotope

Question 5

whats the working thought on how In-111 WBC imaging works

Answer 5

labeled cells go to areas of infection, reinject at 24hrs

Question 6

summarize In-111 WBC WB scan

Answer 6

no bone, tag WBC w/ In-111, image @ 24 hr, FUO

Question 7

clinical indication for WBC

Answer 7

-FUO (usually sepsis)
-osteomyelitis (hip replacement)
-diabetic foot (poor blood flow)
-infected central venous access (port, VAD, dialysis cath)
-IBD site

Question 8

FUO rules

Answer 8

> 101 degrees F at two times, ill for 3 week, not immuncompromised pt, unsure dx

Question 9

OLD WAY: Tc-99m WBC/ In-111 WBC

Answer 9

-3 phase bone
-3 hr bone delay
-24 hr bone/ WBC images (if ordered)
-osteomyelitis
set IV>draw blood>image st> 3 hrs later images> 24 hr images if ordered if WBC ordered too