Cervical Cytology
Quality assurance
Screening error
Definition of quality assurance
Internal quality assurance
External quality assurance
Training
Laboratory management
Quality standards for cervical screening
Estimation of sensitivity and specificity

 

Quality Standards for Cervical screening
(Quality Assurance guidelines NHSCSP  -UK 1996)

Objective Measurement Acceptable value
To minimise risk of invasive cervical cancer Screen  women aged 25 - 64 at least once every 5yrs 80%coverage of women aged 25-64
To ensure effective sampling of Transformation zone Cytological evidence of T-Z Sampling 80% of smears contain metaplastic cells
To ensure accuracy of smear reporting Sensitivity of primary screening with respect to final report for all negative or inadequate smear 85-95%(see next slide for method of calculation)
To ensure accuracy of smear reporting Determine Positive Predictive value for HSIL 65-90% for HSIL or worse (see next slide for method of calculation)
To ensure all personnel are competent to screen & report  cervical smears All staff  are certified  for screening and participate in  continuing professional education 100% staff have acceptable performance
Back
Next