Evaluation of operation and death statistics at surgical procedures by using attribute control charts

Abstract

Statistical Process Control (SPC) is a technique that enables the quality controller

to monitor, analyze, predict, control, and improve a production process

through control charts. So to use of SPC in medical field is very important.

The cases were obtained at the Ondokuz Mayis University Faculty of medicine

departments of surgical sciences within two year were evaluated. The outcomes

of the operations in these departments were followed throughout twenty-four

months. For a surgical procedure has two possible outcomes; a nonconforming

product (the patient dies) or a conforming one (the patient survives), the

both the death and the alive were accepted as attribute data. The four type of

attribute charts were applied to this data. These were p-chart, np-chart, c-chart

and u-chart. If the statistical process was an “in-control” or not was tried to

determine by the attribute charts. As a result of the statistical processes of these

departments were evaluated, this provided easily be viewed the pattern of process.

The aim of this research is to use the attribute control charts in medical

field (especially hospital performance evaluation) and to show availability of

the attribute control charts in medical field.

Keywords

• Attribute charts,C-chart,Np-chart,P-chart,Statistical process control

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