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Visualization and recording of intravascular details by fiberoptic angioscopy: the Sumida cardioangioscope
S Sumida1, M Masuda, M Furuyama
1Department of Cardiovascular Surgery, National Fukuoka Central Hospital, Japan.
Insights
The Sumida cardioangioscope offers direct intravascular visualization for diagnosing vascular diseases. This flexible catheter enables clear imaging of arteries and veins, aiding in treatment planning.
Area of Science:
- Cardiovascular Imaging
- Medical Device Technology
- Vascular Surgery
Background:
- Direct visualization of the intravascular lumen is crucial for diagnosing and treating vascular diseases.
- Existing diagnostic methods may lack the resolution or directness required for comprehensive vascular assessment.
Purpose of the Study:
- To evaluate the diagnostic capabilities of the Sumida cardioangioscope for intravascular observation.
- To demonstrate the feasibility of using this device for detailed imaging of various vascular structures.
Main Methods:
- The Sumida cardioangioscope, a flexible catheter with integrated optics and illumination, was utilized.
- The device comprises a camera, lightguide, transport channel, inflatable cuff, and manipulation handle.
- High-resolution imaging was performed on canine abdominal aortas and various human vascular systems (coronary, aortic valves, arteries, venous).
Main Results:
- The cardioangioscope successfully provided clear, direct visualization of the intravascular lumen.
- Detailed imaging was achieved in multiple vascular beds, including the abdominal aorta, coronary arteries, and venous system.
- Recorded observations were captured on videotape, 16-mm film, and 35-mm photographic film.
Conclusions:
- The Sumida cardioangioscope offers accurate diagnostic information for vascular disease detection.
- The device's capabilities support potential therapeutic interventions such as angioplasty and laser ablation.
- This technology represents a significant advancement in direct intravascular imaging and diagnosis.
Abstract:
Direct selective observation of the intravascular lumen through a catheter cardioangioscope provides accurate diagnostic information that facilitates the detection and treatment of vascular diseases. The Sumida-cardioangioscope is approximately 0.75 to 2.4 mm in diameter and consists of at least 3,000-6,000 delicate glass fibers, each measuring 4.8-5.5 micron and fused into a long flexible 75 to 130 cm tube. The cardioangioscope has the following components: (1) a scope connected to a camera; (2) a lightguide, consisting of 80-500 fibers, measuring 30-50 micron in diameter, and a 75-watt xenon lamp; (3) a transport channel for saline or drug solution; (4) an inflatable cuff; and (5) a handle to manipulate the catheter tip. The abdominal aorta in living dogs and the coronary arteries, aortic valves, abdominal-iliac, femoral and popliteal arteries, abdomino-iliac bifurcation, and venous system were clearly observed and recorded on videotape, 16-mm movie film and 35-mm photographic film. Angioplasty by balloon and laser ablation are possible applications.