GI Bleeding (RBC Tagging) Scan

NMT 3-1 SEM 1 MIDTERM SIR LARRY

Labeled RBC Gastrointestinal Bleeding Scan

a diagnostic nuclear medicine procedure used to localize the source of acute gastrointestinal bleeding

Tc 99m labeled red blood cells

This is used to perform GI Bleeding Scintigraphy in patients suspected of active gastrointestinal bleeding.

0.1-0.35 ml per minute

The bleeding rates that GI bleeding scintigraphy can detect per minute.

Within the bowel lumen

Where is the site of active bleeding?

Antegrade

The activity of the lumen of the bowel where the GI Bleeding moves forward or proceeds in the natural progression.

Retrograde

The activity of the lumen of the bowel where the GI Bleeding moves backwards or reverting to earlier state

Tc 99m Pyrophosphate (30-40 mci)

Radiopharmaceutical used for GI Bleeding / Tagged RBC scan

Tc 99m Sulfur Colloid

Alternate radiopharmaceutical used for GI Bleeding / Tagged RBC scan

5.0 ml of NSS

What is to be used to reconstitute the contents of the pyrophosphate vial by slow injection

Supine

In what position is used to acquire the chest and pelvic area of the patient

100 k

The number of static counts needed to acquire serial images at its designated intervals.

60 minutes

Dynamic View (Frame/Time): Phase duration

60 seconds

Dynamic View (Frame/Time): Frame duration

60 frames

Dynamic View (Frame/Time): Number of frames

1 hour

When to acquire the images for the first time?

2 hours

When to acquire the images for the second time?

3 hours

When to acquire the images for the final time?

24 hours

If the images are still negative after 3 hours, when is best to acquire more images?

Injected intravenously

How was the 0.4 ml of heparin and tc-99m solution introduced to the body?

After 1 hour

When can the technologist start with the dynamic acquisition