An analyzer for measuring the ionic values of electrolytes in a sample solution having a fluid flow-through air segment detector (300) and a plurality of fluid flow-through ion selective electrodes (97,98) for measuring the ionic values of electrolytes and a fluid flow-through reference membrane assembly (96) connected in series. There is also a reference electrode (95). There is a reservoir (77) containing an internal filling solution. The reference membrane assembly and the reference electrode are located in the reservoir and exposed to the internal filling solution. A tubular fluid sampling probe (70) having a sampling port (63) aspirates air, sample and liquid reagents through the system. The probe cooperates with a slide valve (64) having a passageway (53) through which the probe reciprocates. The passageway contains a plurality of chamber ports (46, 47, 48) each of which is sealed from the other ports by the tube sampling probe when its sampling port is positioned within a chamber port, A reagent pouch having a plurality of chambers communicating with a separate chamber port in the slide valve (20, 21) contains liquid reagents and a wash solution. One chamber in the reagent pouch receives waste and is in fluid communication with the flow-through reference membrane assembly. Means (50) are employed for pumping an electrolyte sample in series through the probe, the air segment detector, the ion selective electrodes, the reference membrane, and then to the waste disposal chamber. There are electronic means for measuring the voltage signal generated between the selective electrode and the reference electrodes for calculating the ionic value of the electrolyte being measured.

A catheter assembly wherein Foley and ureteral catheters and a drainage bag are all coupled together by a coupling chamber. The coupling chamber has an entrance at one end for the Foley catheter and a drainage exit at an opposite end. Two secondary chambers extend outward from and connect to the mid region of the central chamber, and each is connectable to a ureteral catheter.

The invention features a fluid drainage element which includes a housing having integral front and side walls and a back wall adapted to fit in fluid communication with a urine collection bag, the walls defining a chamber in the housing. The housing also contains a tubular section integral with the front wall, the tubular section including an inner wall defining a lumen which is in fluid communication with the chamber. The inner wall includes one or more ribs arranged circumferentially and shaped so as to maximize the cross-sectional area of the inner wall, act as an integral tubing stop, and additionally to promote capillary flow of fluid through the tubular section and into the chamber.

A ureteral catheter comprising a tip of reactive reagent material to detect the presence of blood or hemoglobin in the urine from one of the ureters or kidney at the mouth of the ureters into the bladder and which catheter is sized for insertion through a cystoscope.

A container for collecting body fluids comprising, a receptacle having a cavity, and a siphon assembly having a pair of opposed spaced walls defining a chamber, a port communicating with the chamber to receive the fluids, and a siphon passageway. The passageway has an upper portion spaced a substantial distance above a lower portion of the chamber and located below an upper portion of the chamber, a first portion connecting the passageway upper portion to the lower portion of the chamber, and a second portion extending downwardly from the passageway upper portion and communicating with the receptacle cavity.