Patent ID: 6010453
Filing Date: 2000-01-04
Classification: A61B,A61M

Abstract:
An apparatus comprising a tonometric catheter combination including:a) a first tonometric catheter portion comprising (i) an elongated tube having a first lumen extending longitudinally therethrough, a portion of said tube being composed of a first material that is substantially impermeable to one or more liquid fluids or gaseous fluids of interest, said fluids of interest including oxygen gases and carbon dioxide gases and (ii) at least one walled sampling chamber on said tube in fluid communication with the interior of said first lumen, the wall of said sampling chamber being composed of a material that is freely and selectively permeable to said one or more liquid fluids or gaseous fluids of interest, said material being substantially impermeable to other liquid fluids or gaseous fluids; andb) a second lumen extending longitudinally along said tube and being adapted for the delivery or draining of a fluid to or from a human internal organ, wherein the second lumen acts as a second catheter which is selected from the group consisting of a urinary catheter, nasobiliary tube, feeding tube, abdominal drainage tube, wound drainage tube, gastrostomy tube and jejunostomy tube.