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Rotational approaches to atherectomy and thrombectomy
J L Ritchie1, D D Hansen, M J Intlekofer
1Department of Medicine, University of Washington, School of Medicine, Seattle.
Zeitschrift Fur Kardiologie
|January 1, 1987
Summary
Rotational atherectomy effectively reduces arterial plaque, while rotational thrombectomy removes fresh thrombus. Both methods show promise in preclinical models, though complications like perforation require further study.
Area of Science:
- Cardiovascular Medicine
- Biomedical Engineering
- Interventional Cardiology
Background:
- Atherosclerosis and thrombosis pose significant cardiovascular risks.
- Existing treatments for arterial disease have limitations.
Purpose of the Study:
- To evaluate a novel rotational mechanical approach for arterial plaque removal (Percutaneous Transluminal Rotational Atherectomy - PTRA).
- To assess a second rotational catheter system for fresh thrombus removal (Percutaneous Rotational Thrombectomy - PRT).
Main Methods:
- PTRA utilizes a diamond-tipped, high-speed rotating burr to abrade plaque.
- PRT employs a low-speed rotating catheter to wind and lyse thrombus.
Main Results:
- PTRA reduced iliac artery stenosis in rabbits from >80% to <40%, with 2 perforations in 13 arteries.
- PRT successfully resolved 20 of 21 thrombotic occlusions in dogs, with one early perforation.
Conclusions:
- Rotational mechanical atherectomy is a viable strategy for reducing arterial stenosis.
- Rotational thrombectomy effectively clears fresh thrombus.
- Further investigation is needed to mitigate complications such as arterial perforation.