present invention the distal ends of the struts 20 are pivotally attached to supporting collar 30 which may be permanently removably or operatively attached to guide wire 80 when operatively attached supporting collar 30 can slide and or rotate with respect to guide wire 80 the struts 20 are operatively attached to the filter membrane 50 which taken together form the filter basket 10 the distal ends of additional tension members 41 attach to proximal ends of struts 20 while the proximal ends of these tension members 41 are fixed to the closure ring 40 when proximal movement ie away from supporting collar 30 is imparted to closure ring 40 this increases the tension in tension members 41 such that strut members 20 are pulled radially inward toward guide wire 80 allowing for filter basket 10 comprised of filter membrane 50 and struts 20 to be collapsed with any retained debris to be captured in basket the entire assembly can then be pulled back into retaining sheath 90 an inner sleeve 35 whose axial position relative to guide wire 80 can impart motion to either closure ring 40 or supporting collar 30 in order to draw the assembly into the retaining sheath 90 or to deliver the assembly from the retaining sheath 90 may also be present the pore size of filter membrane 50 can be optimized by altering the diameters of the individual pores 22 as well as their location of different sized pores relative to each other in.