Abstract: An improved method and apparatus for effecting mid-stream sampling of catheterized flow of liquid from a body cavity is effected through use of an improved coupling between sections of catheter tube means. The improved coupling includes a tubular cross-member that provides two pairs of oppositely extending tubular arms, a first pair of arms adapted to connect to the portions of the catheter tube means, and with a valve member constructed and arranged for selective reciprocal movement in the other pair of tubular arms and so as to permit usual drainage in one position or to provide, in said second position, means for effecting diversion of flow for effecting mid-stream sampling without separating portions of the catheter system that might permit contamination. In the second position, the constructions permit of effecting a backflow flushing of the body cavity, or application of medication, or an instrument, through the improved coupling into the body cavity.

Abstract: A combination catheter venting and urine sample collecting unit comprises a hollow open-ended body having an outlet and adapted to receive and communicate with a conduit extending to a urine collecting reservoir and an inlet adapted to receive and communicate with a catheter extending to the bladder. The body further has a urine collection needle-receiving port and a number of circumferentially spaced venting apertures spaced longitudinally of the said needle-receiving port. A strip of bacteria and liquid impermeable, and air-permeable filtering material is positioned in liquid-sealing relation beneath the venting apertures. The filtering material is carried on the outside of an open-ended support tube having circumferentially spaced apertures in alignment with said venting apertures. The support tube is enveloped by said body which is preferably molded about the tube. The body has a continuous outer annular indented wall surface upon which the needle-receiving port opens.