Fluidic infusion system for catheter or probe

Abstract

A fluidic infusion system introduces a select liquid chemical into the environment surrounding the functional end of an in vivo catheter or probe. The catheter/probe typically has a-sensor or electrode positioned near or at its closed distal end. A plurality of spaced radial openings are formed in an appropriate pattern adjacent to the end of the catheter/probe for introducing the select liquid chemical into the appropriate environment. The catheter/probe has at least one lumen extending through its length for directing the liquid chemical from a controlled pump to the radial openings. The openings are positioned within the catheter/probe so that when the catheter/probe is inserted into the appropriate environment, e.g., within a blood stream inside an artery or vein, the openings are upstream from the sensor or electrode relative to the flow of blood within such environment, thereby allowing the natural flow of blood to carry the liquid chemical from the radial openings to the sensor or probe area, where it can perform its intended function. The openings allow fluid flow therethrough only in one direction--from the lumen to the environment surrounding the catheter/probe. The catheter/probe may include a plurality of lumens for transporting differing liquid chemicals to the concerned environment.