Monocyte counting: discrepancies in results obtained with different automated instruments.

Monocyte counting: discrepancies in results obtained with different automated instruments.

To determine the accuracy of several methods for measuring the monocyte count, the results obtained by a number of different automated cell counters were analysed. Considerable discrepancies occurred for monocyte counts obtained in normal blood among the counters. The results of a visual monocyte count on a total of 800 leucocytes were used as the reference method. The technique of measuring th...

Understanding Discrepancies in Vibration Amplitude Readings Between Different Instruments

Comparison of acoustic immittance measures obtained with different commercial instruments.

Three acoustic admittance measurements (tympanometric peak pressure, peak compensated static acoustic admittance, and tympanometric width) were compared across seven commercially available acoustic immittance systems. Forty-nine adult subjects (45 females and 4 males), 16 to 50 years of age (mean = 27.7 years), with normal middle ear function participated in this investigation. Small but statis...

Discrepancies in international normalized ratio results between instruments: a model to split the variation into subcomponents.

BACKGROUND Observed differences between results obtained from comparison of instruments used to measure international normalized ratio (INR) have been higher than expected from the imprecision of the instruments. In this study the variation of these differences was divided into subcomponents, and each of the subcomponents was estimated. METHODS Blood samples were collected at 4 different pati...

Discrepancies between results obtained by agar and broth techniques in testing of drug combinations.

One hundred strains of Staphylococcus epidermidis were tested by the double-disk agar diffusion method for their susceptibility to cephalothin, to sulfamethoxazole-trimethoprim, and to combinations of these drugs. Forty-five strains showed a bridging inhibition zone between the two disks, suggesting a synergistic effect of the combination of cephalothin plus sulfamethoxozole-trimethoprim agains...