Immunoscintigraphic detection of venous thrombosis of the lower extremities by means of human antifibrin monoclonal antibodies labeled with sup 111 In

Journal Article · Sat Jul 01 00:00:00 EDT 1989 · Angiology; (USA)

DOI:https://doi.org/10.1177/000331978904000710· OSTI ID:5640662

Lusiani, L; Zanco, P; Visona, A; Breggion, G; Pagnan, A; Ferlin, G ^[1]

---

1. Universita di Padova (Italy)

A new monoclonal antibody specific for the beta-chain of human fibrin (C22A) and labeled with 111In has been obtained and successfully used in rabbits and dogs for the in vivo detection of venous thrombosis. Studies in humans are currently ongoing. In order to assess the diagnostic value of 111In-antifibrin for the detection of venous thrombosis of the lower extremities, the authors investigated 25 consecutive patients. Ten patients had clinical and instrumental (contrast phlebography and duplex scanning) evidence of acute deep venous thrombosis (DVT), 3 had a long-standing DVT with relapsing episodes of swelling and pain, 5 had superficial venous thrombosis, and the remaining 7 had no signs of thrombosis at all. Twenty patients were being treated with heparin. All patients received 111In-antifibrin at the dose of 74 MBq IV and were scanned with a large field of view gamma camera coupled with a high-energy, parallel-hole collimator at 30 minutes and three, six, and twenty-four hours postinjection. Only the persistence of an abnormal uptake at twenty-four hours confirmed by two observers at visual inspection was considered as positive. A positive result was obtained in 9 of 10 DVT patients (90% sensitivity) and in all SVT patients. The single DVT patient with a negative 111In-antifibrin test had the longest interval between scintigraphy and onset of symptoms (fifty-five days). Thus, the age of thrombi represented a substantial limitation for the test. A false-positive result was obtained in a single SVT patient, in whom also a deep involvement, unconfirmed by phlebography, was suspected (91.6% specificity).

• OSTI ID: 5640662
• Journal Information: Angiology; (USA), Vol. 40:7; ISSN 0003-3197
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
LEGS
RADIOIMMUNOSCINTIGRAPHY
THROMBOSIS
DIAGNOSIS
FIBRIN
INDIUM 111
MONOCLONAL ANTIBODIES
PATIENTS
SPECIFICITY
ANTIBODIES
BETA DECAY RADIOISOTOPES
BODY
BODY AREAS
CARDIOVASCULAR DISEASES
COAGULANTS
COUNTING TECHNIQUES
DAYS LIVING RADIOISOTOPES
DIAGNOSTIC TECHNIQUES
DISEASES
DRUGS
ELECTRON CAPTURE RADIOISOTOPES
HEMATOLOGIC AGENTS
HEMOSTATICS
INDIUM ISOTOPES
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
LIMBS
MINUTES LIVING RADIOISOTOPES
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
PROTEINS
RADIOIMMUNODETECTION
RADIOISOTOPE SCANNING
RADIOISOTOPES
SCINTISCANNING
SCLEROPROTEINS
TRACER TECHNIQUES
VASCULAR DISEASES
550601* - Medicine- Unsealed Radionuclides in Diagnostics