Thromboembolic potential of synthetic vascular grafts in baboons

Journal Article · Sat Jul 01 04:00:00 EDT 1989 · J. Vasc. Surg.; (United States)

DOI:https://doi.org/10.1067/mva.1989.vs0100075· OSTI ID:5820381

Schneider, P A; Kotze, H F; Heyns, A D; Hanson, S R

We have compared in baboons the capacity of two types of synthetic vascular grafts to accumulate thrombus, activate circulating platelets, and generate occlusive platelet microemboli. Grafts were incorporated into femoral arterial-arterial shunts placed unilaterally in 10 baboons; the unoperated contralateral limbs served as controls. The accumulation of indium 111 (111In)-labeled platelets onto the grafts (expanded polytetrafluoroethylene (ePTFE) or knitted Dacron, 4 mm inner diameter) and the appearance of 111In radioactivity in distal microcirculatory beds (calf and foot) were quantified by dynamic scintillation camera imaging. After 1 hour total platelet deposition per graft was higher with Dacron (49.0 +/- 8.0 x 10(9) platelets) than with ePTFE (3.7 +/- 0.6 x 10(9) platelets, p less than 0.01). Platelet counts decreased and beta-thromboglobulin levels increased with Dacron graft placement but were unaffected by ePTFE graft placement (p less than 0.05 and p less than 0.01, respectively). Emboli shed from Dacron grafts were detected as multifocal, irregular, and changing deposits in the calves and feet. Indium 111 platelet activity in the feet distal to the Dacron grafts increased 81.1% +/- 21.4% from baseline values over 1 hour, whereas the activities in the feet distal to the ePTFE grafts were unchanged (p less than 0.05). The increase 111In-platelet radioactivity above the control limb values (excess radioactivity) was higher for the Dacron graft group than for the ePTFE group in both the feet (139.6% +/- 46.9% vs 6.2%, p less than 0.05) and the calves (86.7% +/- 21.7% vs 7.3% +/- 3.6%, p less than 0.05).

• Research Organization: Roon Research Center for Arteriosclerosis and Thrombosis, La Jolla, CA (USA)
• OSTI ID: 5820381
• Journal Information: J. Vasc. Surg.; (United States), Journal Name: J. Vasc. Surg.; (United States) Vol. 10:1; ISSN JVSUE
• Country of Publication: United States
• Language: English

Related Subjects

550601* -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
ANIMALS
BABOONS
BETA DECAY RADIOISOTOPES
BIOLOGICAL ACCUMULATION
BIOLOGICAL MATERIALS
BLOOD
BLOOD CELLS
BLOOD PLATELETS
BLOOD VESSELS
BODY
BODY AREAS
BODY FLUIDS
CARDIOVASCULAR DISEASES
CARDIOVASCULAR SYSTEM
COUNTING TECHNIQUES
DAYS LIVING RADIOISOTOPES
DIAGNOSIS
DIAGNOSTIC TECHNIQUES
DISEASES
ELECTRON CAPTURE RADIOISOTOPES
FLUORINATED ALIPHATIC HYDROCARBONS
GRAFTS
HALOGENATED ALIPHATIC HYDROCARBONS
INDIUM 111
INDIUM ISOTOPES
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEGS
LIMBS
MAMMALS
MATERIALS
MINUTES LIVING RADIOISOTOPES
MONKEYS
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
ORGANS
POLYETHYLENES
POLYMERS
POLYOLEFINS
POLYTETRAFLUOROETHYLENE
PRIMATES
RADIOISOTOPE SCANNING
RADIOISOTOPES
SCINTISCANNING
THROMBOSIS
TRANSPLANTS
VASCULAR DISEASES
VERTEBRATES