- Proposed solutions to improve the quality of clinical biochemistry laboratory. Methods: A cross-sectional descriptive study Results and conclusions Research survey on current national shows 120 Labs: Had implemented the basic phases in the process pre -, analytical and post-analytical, and implementation of quality control and safety in the laboratory, but not yet complete on all phases, at all levels: The quality control: the lowest stage of external quality assurance participation was 43.33%; the important step is Internal quality control was 59.16%.