1. Hydraulic analysis of the functional properties of saline-jet aspiration thrombectomy catheters
- Author
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Tohru Takeshita, Shigeru Furui, Hiroshi Kohtake, Tatsuro Kaminaga, Arimi Harasawa, T Yamauchi, and Hiroko Tanaka
- Subjects
medicine.medical_specialty ,Radiological and Ultrasound Technology ,Thrombus aspiration ,business.industry ,medicine.medical_treatment ,Water ,Aspiration Thrombectomy ,Models, Theoretical ,Sodium Chloride ,Catheterization ,Surgery ,Catheter ,Pressure ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,business ,Saline ,Thrombectomy ,Biomedical engineering - Abstract
The purpose of this paper is to clarify the functional properties of a saline-jet aspiration thrombectomy catheter based on hydraulics. This catheter, developed by the authors, aspirates intravascular thrombi by means of the effect of a high-speed jet. We have derived the relationships between Qs, Qa, and p(n), where Qs is the water supply rate, Qa is the water aspiration rate and p(n) is the negative pressure created in the distal lumen of the catheter. The relationships are represented by simple equations using c1 and c2, where c1 and c2 are coefficients proper to the catheter. We have obtained c1 and c2 experimentally for three types of catheter with different distal shapes. Two practical conclusions are derived from this study. First, making a short taper at the distal end increases the negative pressure created and is advantageous for thrombus aspiration. Second, making the diameter of the inner tube and nozzle smaller is essential for improving the aspiration ability of the catheter.
- Published
- 1999