Double wall balloon catheter system

A double wall catheter system adapted to be retained within a patient body cavity and drain bodily fluid from the patient body cavity comprising:

• (a) a catheter member extending in a longitudinal direction having a catheter lumen, said catheter member defining a catheter sidewall member extending in a longitudinal direction, said catheter member having at least one catheter drainage orifice formed through said catheter sidewall member adapted for draining a body cavity drainage fluid to pass therethrough;
• (b) a balloon coupled to said catheter sidewall member, said balloon having a double balloon wall configuration defining an inner balloon wall and an outer balloon wall forming in cross-section a balloon fluid passageway therebetween;
• (c) a balloon fluid inflation conduit extending within said catheter sidewall member in fluid communication with said balloon fluid passageway for expansion of said balloon in a radial direction with respect to said longitudinal direction for retention of said catheter member within said patient body cavity when an inflation fluid is inserted into said balloon fluid passageway and,
• (d) at least one balloon through conduit formed between and joined to said inner balloon wall and said outer balloon wall in fluid communication with said patient's body cavity and an inner balloon cavity, said inner balloon cavity being in fluid communication with said at least one catheter drainage orifice for passage of fluid from said patient body cavity into said catheter lumen.