laboratoriotutkimuksin

Laboratoriotutkimuksin is a Finnish adverbial form meaning "by laboratory tests" or "through laboratory investigations." It derives from laboratorio ("laboratory") and tutkimus ("study, test") with the instrumental/adverbial ending -in, and is used to indicate that observations, diagnoses, measurements or conclusions were obtained or verified using laboratory methods.

In medical contexts laboratoriotutkimuksin commonly refers to clinical laboratory testing—blood chemistry, hematology, microbiology, immunology, molecular diagnostics and urinalysis—used to detect disease, monitor therapy and guide clinical decisions. In scientific research and industry the term covers analytical chemistry, environmental monitoring, materials testing and quality control procedures performed in a laboratory setting.

Typical laboratory workflows include sample collection and handling, analytical measurement using instrument-based or manual methods, internal quality control and external accreditation processes. Interpretation of laboratoriotutkimuksin results requires consideration of pre-analytical factors (sample timing, collection), analytical performance (sensitivity, specificity, calibration) and clinical or contextual information.

Limitations include potential for sampling errors, method-specific uncertainty, and false positives or negatives; results are often combined with clinical assessment or other data. Regulatory frameworks and standards, such as ISO accreditation schemes for medical and testing laboratories, govern quality and competence in many jurisdictions. The term is used in everyday Finnish professional and lay language to denote reliance on laboratory-based evidence.