Systems, devices and methods for draining and analyzing bodily fluids

Abstract

Systems, devices and methods for draining and analyzing bodily fluids are disclosed in which a drainage assembly is configured to prevent negative pressure build-up. The drainage assembly generally includes a catheter which may include a drainage lumen, a reservoir, a venting mechanism in fluid communication with the drainage lumen and a positive pressure lumen, and a controller. The venting mechanism may further include a valve which is configured to maintain a closed position, as well as a vent in fluid communication with the valve, where the venting mechanism is configured to inhibit wetting of the vent from fluid within the drainage lumen

What is claimed is: 
     
         1 . A drainage assembly configured to prevent negative pressure build-up, comprising:
 an elongate catheter having a first end configured for insertion within a body lumen, the catheter having at least one opening near or at the first end in fluid communication with a catheter lumen defined therethrough;   a drainage lumen in fluid communication with a second end of the catheter;   a reservoir in fluid communication with the drainage lumen;   a venting mechanism in fluid communication with the drainage lumen and a positive pressure lumen;   a valve positioned within the venting mechanism and configured to maintain a closed position until a first pressure level within the drainage lumen drops to a second pressure level such that the valve moves to an open position;   a vent positioned in fluid communication with the valve, wherein the venting mechanism is configured to inhibit wetting of the vent from fluid within the drainage lumen; and   a controller in communication with the reservoir, wherein the controller is configured to determine a fluid volume collected within the reservoir.   
     
     
         2 . A drainage assembly configured to prevent negative pressure build-up, comprising:
 an elongate catheter having a first end configured for insertion within a body lumen, the catheter having at least one opening near or at the first end in fluid communication with a catheter lumen defined therethrough;   a drainage lumen in fluid communication with a second end of the catheter;   a positive pressure lumen in fluid communication with the drainage lumen;   a reservoir in fluid communication with the drainage lumen;   a venting mechanism coupled to the drainage lumen, wherein the venting mechanism is configured to inhibit wetting of a vent from a fluid within the drainage lumen;   a controller in communication with the reservoir, wherein the controller is configured to determine a fluid volume collected within the reservoir; and   a valve configurable between a closed position and an open position, wherein the valve moves from the closed position to the open position when a first pressure level imparted upon the valve drops to a second pressure level.