Kaplemer - (Kaudsemer): a diagnostic tool used in capillary and venous hemodialysis and which allows you to automatically determine the characteristics of blood passing through hemodialysis systems. Drop meters (Syn.: “Normal drop meter”) are a type of diffraction device, which is a small meter with a set of necessary characteristics: Shape: Curved tube about 3 cm long. Size: Length about 2.7 cm, width about 0.8 cm Surface measurable length ~500 µm (for oxygenation test). At the end of the tube there is a ring with a diameter of about 4 mm. Standard sizes for plastic are usually calibrated on this ring, allowing measurements to be taken and interpreted. Sensitivity: Typically greater than 120 -160 mmH2O. Recommended temperature: Water. Complete diffusion typically occurs at 33 -37 degrees Celsius. If possible, 2-3 samples should be taken at these temperatures. Using external distilled water by reducing the sample temperature towards the boiling point can reduce sensitivity and will often lead to measurement error, especially with normal samples. Purity: Must be sterile, contain a preservative (such as sodium thiosulfate or vinegar