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Shock waves in vascular diseases: an in-vitro study
G Belcaro1, A N Nicolaides, E H Marlinghaus
1Angiology Department, Pierangeli Clinic, Pescara, Italy.
Angiology
|October 23, 1998
Summary
Shock waves (SW) did not cause visible, ultrasound, or histological damage to human aortic tissue in vitro. These findings suggest SW therapy is a safe, non-damaging option for vascular applications like thrombolysis or plaque modification.
Area of Science:
- Biomedical Engineering
- Cardiovascular Research
- Medical Physics
Background:
- The arterial wall's response to external physical stimuli is crucial for understanding vascular disease progression and treatment efficacy.
- Investigating the safety of novel therapeutic modalities, such as shock waves (SW), on vascular tissues is essential before clinical application.
Purpose of the Study:
- To evaluate the in vitro effects of various energy levels of shock waves (SW) on human aortic tissue.
- To determine if SW application causes structural damage to normal and arteriosclerotic aortic walls.
Main Methods:
- Human aortic specimens (normal and arteriosclerotic) were exposed to controlled SW energy levels in degassed water.
- High-resolution ultrasound and histology (hematoxylin-eosin staining) were used to assess structural changes before and after SW treatment.
- Energy flux densities ranged from 0.03 to 0.5 mJ/mm², encompassing levels from minimal to theoretically destructive.
Main Results:
- No macroscopic, ultrasound-visible, or histological damage was observed in any aortic specimen, even at higher SW energy levels.
- Visual examination, ultrasound, and histology confirmed the absence of SW-induced damage to the aortic wall.
- The study demonstrated that SW, at the tested energy levels, did not alter major structural arterial wall characteristics.
Conclusions:
- Shock wave (SW) therapy appears to be a safe and non-damaging procedure for potential vascular applications, including thrombolysis and arterial plaque modification.
- The findings support the theoretical possibility of using SW for vascular treatments without compromising arterial wall integrity.
- Differences in acoustic impedance between normal tissue and pathologies like thrombi or plaques may allow for targeted SW treatments with minimal damage to healthy arterial walls.