Feasibility study for realization of optical transillumination imaging of arteriovenous fistula.

Daily management of arteriovenous fistula for dialysis patients is crucially important because it sometimes leads to stenosis and obstruction. Numerous shortcomings are associated with management techniques used today. Aside from being invasive, they also require the use of inspection, auscultation, and palpation. Moreover, they rely on the extensive experience of technicians. Actually, definite diagnosis can be made using angiography, but angiography entails difficulties associated with radiation and bulky equipment. To overcome these difficulties posed by current management techniques, we proposed an optical imaging technique. Unfortunately, the related apparatus was too large and heavy for bedside use. This paper therefore explains the possibility of clinical application of our novel technique using compact and light apparatus. Contrast of blood vessel transillumination images is intensified with two wavelengths used for measurements. Results indicate improved accuracy of inner diameter measurements of blood vessels. This study confirmed the possibility of applying this technique in medical settings to achieve continuous management of AV fistula. [ABSTRACT FROM AUTHOR]