Abstract: A seal and wiper assembly covers the opening of a reservoir of buffer solution in a blood glucose level. A monitor. A replaceable test cap is designed for single use. As the test cap is installed, a clock starts to run. After a predetermined time, the clock disables the monitor. As the test cap is removed from the buffer, the assembly wipes the buffer from the glucose sensor.

Abstract: A sample of oral fluid is collected by an absorbent nonreactive collecting swab brought into contact with a favorable surface in the oral cavity. The fluid is interstitial transudate selectively collected from the vestibule region of the oral cavity at the junction of the superior labial mucous membrane and the superior gingivae between the upper canine teeth. The collecting swab is an open cell foam material with a fine (e.g., 0.3 mm diameter) cell size. The collecting swab is placed in a cylindrical concentrator and the fluid sample is squeezed through a small hole in the concentrator by pushing a plunger into the concentrator and squeezing the fluid from the collecting swab into a monitoring instrument located off site. A common electronic circuit in the instrument generates an electrical glucose representative readout for oral fluid or whole blood. A sheet of graph paper has rectangular coordinates one of which represents glucose level and the other which represents time of day.