A device and a method for increasing or restoring a flow in a body lumen are provided. The device and the method may treat conditions like a stroke by removing a clot from a blood vessel and/or reopen the vessel. The device may have an expandable compartment comprising a reconfigurable element and a supportive element. The supportive element can adjust a radial force and a configuration of the reconfigurable element, thereby allowing efficient removal of a clot from a blood vessel and/or reopen the vessel with least or no damage to the vessel. Alternatively, the device may have an engaging compartment comprising a distal engaging element and a proximal engaging element. A clot in a blood vessel may be engaged in and/or between the distal and proximal engaging elements. The positions of one or both of the engaging elements and the distance therebetween can be adjusted to ensure the engagement of the clot or occlusion.
