a tubular disposable probe , having a central lumen having a plurality of conductive pathways extending longitudinally of the probe from the proximal end to the distal end , and a reusable connector are provided . the reusable connector is formed of a resilient plastic material and includes two portions which are movable away from each other to permit installation of the connector on the probe at an appropriate point and are movable toward each other in clamping relationship to retain the connector on the probe wall . the connector includes a plurality of sharp prongs adapted to penetrate into the wall of the tube and make contact with the conductive pathways . the connector further includes projecting engageable elements for limiting the inward movement of the two portions of the connector so as to prevent any significant reduction in the size of the central lumen when the connector is installed . alternatively , transverse grooves or notches are formed in the exterior wall of the tube and extend into the conductive pathways . in this case , the connector is formed with contacts conforming to the notches and receivable in the transverse notches for making connection with the conductive pathways in the probe .