An aspiration apparatus 10 is described that includes a guide 12 and a set of needles 14. Guide 12 preferably has an approximately conical shape with a decreasing diameter in the distal direction. A plurality of lumens 32 extend between a distal end portion 18 and a proximal end portion 20 of guide 12....http://www.google.de/patents/US8123699?utm_source=gb-gplus-sharePatent US8123699 - Method and apparatus for aspiration
