| 摘要 |
A device and method for fistula treatment are disclosed comprising a laser source, a fiber optics system and an online monitoring system. An optical fiber, radiating from its distal end in an essentially radial pattern, is inserted utilizing suitable tools for imaging, placement and insertion. Radiation is delivered until shrinkage and closure are observed and fiber optic device is removed after a few minutes. Preferred wavelengths are 980±30 nm, 1320±50 nm, 1470±60 nm and 2000±50 nm applied alone or in combination. In another embodiment, the disclosed procedure is used as a complement of conventional techniques such as fistula plugs or placement of mucosa flaps to enhance results. In another preferred embodiment, the inner layer of the tract is saturated with light sensitive substances, such as photosensitizers. Thus, homogeneous irradiation of the surface using a suitable light distributor and light/laser source causes a depth limited necrosis of the relevant tissue. Present method and device can be used successfully to treat high fistulas with less pain than fistulotomy and without risk of bowel incontinence. Procedure requires short hospitalization stays. |
