Devices and methods for intrabody surgery

A device for intrabody surgery, comprising:

• a cutting arrangement for intravascular surgery rotatable by a driveshaft;
• the cutting arrangement formed by a substantially hollow front cutting region and a rear region, a connecting element extending from the rear region for connection to a distal end of the drive shaft, a sleeve is formed by a wall having a front edge and defining an interior hollow space, at least a part of cutting region is disposed within the interior hollow space of the sleeve, said sleeve is arranged at the connecting element so as to be movable between an expanded and contracted positions, when in the contracted position the wall of the sleeve is interposed between the cutting region and a blood vessel wall preventing the blood vessel from damage, in the expanded position the front end of the sleeve engages an occlusion and allows the cutting region rotatable by drive shaft to engage with the targeted occlusion in the vessel lumen through the interior space of the sleeve, said sleeve is moved from the contracted position to the expandable position when rotational motion of the driveshaft and the cutting arrangement are initiated;
• an external base formed by a cylindrical side and a rear wall, so that a hollow inner cavity is defined, a plurality of engaging segments is positioned in the inner cavity for independent slidable movement;
• and
• a biasing member is positioned between a rear part of each segment and a rear wall of the base, wherein upon the sleeve approaching an occlusion a front part of each segment engages an occlusion independently from other segments.