LADDER-TYPE EXTENSIBLE STENT Russian patent published in 2004 - IPC

FIELD: extensible medicinal implants for keeping of tubular organ clearance in body.

SUBSTANCE: stent has tubular member comprising set of ladder-type members engaged in sliding relation with one another. Each ladder-type member has at least one radial elongated rib with two ends and at least two end steps, with end step being attached to each end of each elongated rib. Elongated rib of first end step is engaged in sliding relation with part of end step of second ladder-type member. Radial sliding of ladder-type members provides distance with variable radius between end steps of first and second ladder-type members. Tubular member has first diameter, wherein distance between end steps of first and second ladder-type members is reduced, and second diameter, wherein distance between end steps of first and second ladder-type members is increased.

EFFECT: minimized probability of repeated stenosis, provision for access to affected region, capacity of stent to accept shape of tubular organ, uniform expansion to desired diameter without changing length of stent and provision for keeping of size in expanded state without substantial yield and clean clearance of flow cavity.

13 cl, 32 dwg