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  • 1
    Digitale Medien
    Digitale Medien
    Reproducibility of measurements with a new slit lamp-mounted ocular blood flow tonograph (1998)
    Springer
    Graefe's archive for clinical and experimental ophthalmology 236 (1998), S. 274-279 
    Details
    ISSN: 1435-702X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract  · Purpose: To assess the reliability of measurements of intraocular pressure (IOP), pulse amplitude (PA), and pulsatile ocular blood flow (POBF) and the validity of measurements of IOP with a new ocular blood flow tonograph. · Methods: Intraocular pressure pulse was assessed with pneumatic tonometry. In this study, we used the OBF Labs ocular blood flow tonograph with two different pneumatic probes, a modified Langham probe and a newly developed probe. One ophthalmologist compared two machines, first with the modified Langham probe and secondly with the newly developed probe (40 volunteers). Additionally, two ophthalmologists performed measurements on different days and in different sequence (34 volunteers). Furthermore, results of IOP measurements performed with this tonograph were compared to those of Goldmann applanation tonometry (213 volunteers). · Results: Using the modified Langham probe, POBF and PA were associated with the machine used for the test. However, using the newly developed pobe, no relevant or statistically significant differences were found for any variables, and reliability coefficients were between 0.70 and 0.90. Linear regression analysis of the Goldmann applanation tonometer on the measurements of IOP with the tonograph showed a regression coefficient of 0.765. · Conclusions: Results of measurements performed with this ocular blood flow tonograph and the newly developed probe are expected to be reliable and comparable.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s004170050077
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Applications of statistical process control techniques in medical fields (2000)
    Springer
    Allgemeines statistisches Archiv 84 (2000), S. 337-359 
    Details
    ISSN: 1614-0176
    Schlagwort(e): Keywords Health care, medicine, on-line monitoring, quality control charts, statistical process control.
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Notizen: Summary: An overview of present-day applications of statistical process control in medical field is given. A general consideration of goals and problems is followed by exemplary presentations of control charts in health care and for the monitoring of technical medical equipment, with a particular focus on Shewhart and Cusum charts. Examples are shown how to derive appropriate target values and control limits for the charts in practice. Further, on-line monitoring procedures for consecutive measurements of a patient's physiological parameters, especially in intensive care units, are described. In this context, statistical techniques based on time series modeling and Kalman filtering are preferred.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s101820000036
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