Quality Assurance in Clinical Laboratories: Internal Quality Control, Accreditation Standards, Biosafety, and Biomedical Waste Management
Updated: Aug 30
| Cerebral Link | Publish by Cerebral Publication Private Limited | 2026 | Volume 3 | Page 177-189 |ISBN: 978-81-689463-5-4 | Book Title: - Textbook of Practical Biochemistry | Chapter-12: Quality Assurance in Clinical Laboratories: Internal Quality Control, Accreditation Standards, Biosafety, and Biomedical Waste Management
Abstract
Quality assurance is a fundamental component of clinical laboratory practice and is essential for ensuring the accuracy, precision, reliability, reproducibility, and clinical usefulness of laboratory results. An effective quality management system encompasses all phases of the testing process, including pre-analytical, analytical, and post-analytical activities, while integrating personnel competency, equipment performance, documentation, biosafety, and waste management. This chapter provides a comprehensive overview of quality assurance in clinical laboratories, with particular emphasis on internal quality control, accreditation standards, biosafety practices, and biomedical waste management.
Internal quality control is discussed in relation to control materials, establishment of target values and acceptable ranges, statistical monitoring, Levey–Jennings charts, coefficient of variation, and application of Westgard rules for detecting systematic and random analytical errors. The complementary role of external quality assessment and proficiency testing in evaluating inter-laboratory performance is also introduced. Laboratory accreditation and quality-management principles are addressed with reference to internationally recognized standards, particularly ISO 15189, alongside requirements for standard operating procedures, document control, equipment calibration, traceability, personnel competency, corrective and preventive actions, and continuous quality improvement.
The chapter further examines biosafety principles, including risk assessment, personal protective equipment, safe specimen handling, infection-control measures, exposure prevention, spill management, and emergency procedures. Biomedical waste management is described through appropriate segregation, labeling, collection, storage, transportation, treatment, and disposal of laboratory waste, including sharps, infectious materials, chemicals, and contaminated disposables, in accordance with applicable regulations. Integrating quality assurance, accreditation, biosafety, and responsible waste management strengthens laboratory performance, protects healthcare personnel and the environment, and supports the delivery of dependable laboratory services for effective clinical decision-making.
Keywords: Quality Assurance, Internal Quality Control, ISO 15189, Laboratory Accreditation, Biosafety, Biomedical Waste Management, Westgard Rules, Clinical Laboratory
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