| 摘要 |
FIELD: medicine. ^ SUBSTANCE: invention relates to medical equipment, namely to expendable medical implants for supporting body cavity space in open state. Stent from sliding and blocking elements includes tubular element which has longitudinal axis. Tubular element contains first radial element and second radial element. First radial element contains elongated bridge with deflectable teeth. Bridge is characterised by upper and lower parts. Upper part narrows from first thickness to second thickness on first direction on circumference, approaching far edge of upper part. Lower part narrows from first thickness to second thickness in direction on circumference opposite to first direction, approaching far edge of lower part. Second radial element is located on circumference near first radial element and contains gearing means, which have configuration for sliding gearing of elongated bridge of first radial element and deflection of deflectable teeth, when teeth contact with gearing means in such a way that tubular element reaches extension in direction on circumference with reduced kickback. Gearing means narrow to second thickness in direction on circumference, approaching far edge of gearing means. In second version of stent implementation gearing means of second radial element include slot intended for sliding gearing of first radial element bridge and deflection of teeth, when elongated bridge of first radial element passes through slot, in such a way that tubular element obtains extension in direction on circumference with reduced kickback. Second radial element does not overlap itself when stent is in extended state. Gearing means narrow on circumference to second thickness, approaching far edge of gearing means in such a way, that first and second radial elements preserve mainly constant common thickness, when first radial element is geared by gearing means of second radial element and stent is in extended state. ^ EFFECT: claimed stent is compact and sufficiently flexible at compression to provide possibility of easy delivery to affected site, is sufficiently flexible at unfolding to correspond the shape of affected body cavity, non-uniformly extends to desirable diameter without changing length; preserves extended diameter without considerable kickback; has sufficient frame to facilitate clear through lumen. ^ 10 cl, 36 dwg |
