aubf quality assessment

Quality control

Testing controls

Pre examination, examination, post examination

Examinations

international organization for standardization

ISO

Quality control

Refers to materials, procedures, and techniques that monitor the

accuracy, precision, and reliability of laboratory tests.

Reliability

ACCURACY + PRECISION

Internal Quality Control

Internal monitoring systems are

built into the test system. Thus

called procedural controls.

External Quality Control

• Proficiency testing (external

quality assessment)

• Unknown samples received from

an outside agency

Internal Quality Control and External Quality Control

Quality Controls

Quality assessment

The overall process of guaranteeing quality patient care is regulated

throughout the entire testing system

Pre examination

variables such as specimen collection, handling, and

storage)

Examination

variables such as reagent and test performance,

instrument calibration and maintenance, personnel requirements, and

technical competence

Post examination

variables such as reporting of results and

interpretation.

Procedure manual

Containing all the procedures performed in the urinalysis

Information included for each procedure

• Calculations

• References

• Author

• Reagents

•Patient preparation

Pre examination errors

• patient misidentification

• wrong test ordered

• insufficient urine volume

Examination errors

• Sample misidentification

• instrument malfunction

• reagent deterioration

• poor testing technique

Post examination errors

• patient misidentification

• poor handwriting

• transcription error

• failure to send report

Quality system

Laboratory’s policies, processes, procedures, and resources needed to

achieve quality testing.

• Procedure manuals

• Internal quality control

• External quality control

• Electronic quality control

Included in a QA Program

At the beginning of each shift or testing day/samples

Control should be performed

• do not re label an incorrectly labeled specimen

• do not discard the specimen until investigation is complete

• do not assume any information about the specimen or patient

Policy for handling mislabeled specimen

• Unlabeled containers

• insufficient volume of urine

• containers with contaminated exteriors

Criteria for urine specimen rejection