Patent ID: 6929618

Claim:
A microdialysis probe, comprising: a first tube extending from a proximal end of the probe to a distal end of the probe; a membrane ( 115 ) mounted over an exterior surface of the first tube; a distal end piece ( 110 ) comprising a distal end portion of the first tube ( 116 ); a distal end portion of the membrane ( 115 ) mounted over an exterior surface of the first tube; a position indicating object ( 130 ) inserted into the distal end of the first tube; and a space ( 118 ) defined by and located between an exterior of the first tube and an interior surface of the membrane; a proximal tubular fitting ( 111 ) attached to the distal end piece ( 110 ); a proximal end of the membrane being fastened to the proximal tubular fitting ( 111 ); a proximal end piece ( 113 ) permanently fastened to the proximal tubular fitting; two further tubes ( 107 , 108 ) located in the proximal end piece and forming an inlet and an outlet from the probe to let a perfusion liquid pass through the probe; an aperture ( 117 ) through a wall portion of the first tube and located adjacent the distal end of the first tube and providing a perfusion liquid communication passage between the space ( 118 ) and the interior of the first tube; wherein, the position indicating object allows non-invasive location of the distal part of the probe when inserted in patient tissue.