MATERIALS AND METHODS Fourteen dogs, each weighing 15-25 kg, were anesthetized
with sodium pentobarbital. A catheter was inserted and se cured into the lumen of the …

MATERIALS AND METHODS Two groups of patients were studied. The first con sisted of 28
control patients,(12F+ I6M), ages 28 through 65 yr, undergoing gated blood-pool scintigrams …

Using a modified in vivo Tc-99m red cell labeling technique, gastrointestinal (GI) bleeding
scintigraphy was performed in 100 patients with GI bleeding. Sixty-two patients with melena …

METHODS One hundred six consecutive Gl bleeding studies with"" re labeled RBCs
performed during a 5-yr period were retrospectively reviewed. All studies were acquired on …

Imaging was done in 80 patients with gastrointestinal hemorrhage using red blood cells
labeled with 99mTc by a modified in vivo technique. Bleeding was detected in 65% of 40 …

Technetium‐99m‐labelled red blood cell scintigraphy was used in the investigation of 41
patients with major rectal haemorrhage. Red cells were labelled in vivo with technetium …

• Seventy-six patients clinically suspected of having lower gastrointestinal bleeding were
studied by scintigraphy utilizing red blood cells labeled in vitro with technetium Tc 99m …

Sixteen patients clinically suspected of having gastrointestinal hemorrhage were studied by
abdominal scintigraphy with RBCs labeled in vitro with technetium Tc 99m. Ten of 11 …

99m Technetium-labeled red blood cell scintigraphy was performed upon 39 patients with
clinical evidence for acute lower gastrointestinal bleeding from an unknown source …

Studies in dogs showed that heat-treated 99mTc-labeled red blood cells (HT/RBC) afford a
highly sensitive means of detecting gastrointestinal bleeding as low as 0.12 ml/min., which …