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Radioiodinated soluble canine fibrin

Journal Article · · Circ. Res.; (United States)
; ; ; ;

To develop a thrombus localizing tracer which has characteristics superior to labeled fibrinogen for external detection, we evaluated radioiodinated soluble fibrin. Labeled soluble fibrin was prepared by clotting and dissolving radioiodinated (/sup 131/I) canine fibrinogen under specified conditions. Biological clearance studies revealed rapid clearance of the labeled soluble fibrin from the blood with a half-life of 5 hours. The accumulation of labeled soluble fibrin and fibrinogen in induced venous thrombi, coronary artery thrombi, and the myocardium was compared in dogs. In venous thrombi, soluble fibrin and fibrinogen exhibited maximum thrombus-blood ratios when they were injected 4 hours after thrombus induction; the thrombus--blood ratio was greater for soluble fibrin than it was for fibrinogen when these agents were injected 4, 8, or 24 hours after thrombosis induction. In induced coronary artery thrombi, soluble fibrin and fibrinogen accumulated to the same extent. Since the blood clearance of soluble fibrin is faster than that of fibrinogen, a higher thrombus--blood ratio was obtained with soluble fibrin in coronary artery thrombi. The thrombus--infarcted myocardium, thrombus--normal myocardium, and infarcted myocardium--normal myocardium ratios obtained with soluble fibrin were slightly higher than those obtained with fibrinogen. Thus, soluble fibrin offers some advantages when it is compared with fibrinogen as a thrombus detecting agent.

Research Organization:
Washington Univ., St. Louis
OSTI ID:
7337472
Journal Information:
Circ. Res.; (United States), Journal Name: Circ. Res.; (United States) Vol. 37:1; ISSN CIRUA
Country of Publication:
United States
Language:
English

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Related Subjects

550601* -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
ANIMALS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BLOOD COAGULATION FACTORS
BLOOD VESSELS
CARDIOVASCULAR DISEASES
CARDIOVASCULAR SYSTEM
COUNTING TECHNIQUES
DAYS LIVING RADIOISOTOPES
DIAGNOSIS
DIAGNOSTIC TECHNIQUES
DISEASES
DOGS
FIBRIN
INTERMEDIATE MASS NUCLEI
IODINE 131
IODINE ISOTOPES
ISOTOPES
LABELLED COMPOUNDS
LABELLING
MAMMALS
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
PROTEINS
RADIOISOTOPE SCANNING
RADIOISOTOPES
SCINTISCANNING
SCLEROPROTEINS
THROMBOSIS
VERTEBRATES