What are the pre-analytical factors?

The preanalytical phase is the phase where the laboratory has no direct control on the process. Preanalytical factors that can affect results include: sample type, sampling time, sample handling, patient’s preparation and the nutritional status of the patient. This will allow better interpretation of results.

Which is an example of a preanalytical variable that affects specimen quality?

Under the broad umbrella of the preanalytical phase can be included specimen collection, handling and processing variables, physiological variables such as the effect of lifestyle, age, gender, pregnancy and menstruation and endogenous variables such as drugs and circulating antibodies.

Why are preanalytical considerations important?

Collection errors can lead to discrepant ABO test results. Preventing preanalytical errors is necessary to ensure accurate and safe patient testing. Patient identification systems that use barcode technology also aid in correct identification of patient and specimen collection tubes.

What are preanalytical and post analytical factors?

The pre-analytic testing phase occurs first in the laboratory process. This phase includes what is usually considered the “actual” laboratory testing or the diagnostic procedures, processes, and products that ultimately provide results. The post-analytic phase is the final phase of the laboratory process.

What is the preanalytical phase of laboratory procedures?

Preanalytical phase comprises of test selection, patient identification, collection of the sample, handling of the sample, sorting out, pipetting and centrifugation (2, 3). Negligence in any of these steps can lead to erroneous results attributed to preanalytical phase.

What is the meaning of preanalytical?

The preanalytical phase is the phase where the laboratory has no direct control on the process. Preanalytical factors that can affect results include: sample type, sampling time, sample handling, patient’s preparation and the nutritional status of the patient.

What are preanalytical variables and what is the phlebotomists responsibility for them?

What are preanalytical variables, and what is the phlebotomist’s responsibility for them? Variables that occur before performing analysis of the specimen. Phlebotomists are most responsible for controlling preanalytic variables, such as ensuring that the equipment they use is free of defects.

What are the factors that affect the result of laboratory tests?

According to the laboratory professionals, the major factors affecting the quality of laboratory results in this study were the shortage of supplies and reagents (95%), poor management support (72.5%), high workload 35 (87.5%), missing of laboratory results 28 (70%) and lack of equipment 37 (92.5%) (Table 1).

What preanalytical factors may affect the HB result?

Extreme environmental conditions such as high temperature and humidity as well as poor infrastructure resulting in inadequate specimen transportation and storage conditions are some of the challenges when working in a low-resource environment. These factors could negatively affect Hb measurements.

What does preanalytical mean?

Which pre analytical factor that can affect validity?

Which preanalytical factor that can affect the validity of test results is not always under the phlebotomist’s control? Patient preparation. Which of the following contains a chronologic record of a patient’s care?

What are three preanalytical sources of error that need to be avoided in order to provide accurate plasma ammonia values?

Examples of preanalytic errors include lack of patient fasting, iatrogenic hemolysis, mislabeling of samples, and inappropriate sample storage.

What factors influence the analytical results in Clinical Biochemistry?

Many factors influence the analytical results in clinical biochemistry, i.e., preanalytical biological or environmental variability, preanalytical technical variability, analytical variability, and postanalytical variability ( Fig. 1 ). The term preanalytical is defined as anything that comes before the analysis phase.

How important is preanalytical variability in clinical chemistry biospecimens?

Most errors in a clinical chemistry laboratory are due to preanalytical errors. Preanalytical variability of biospecimens can have significant effects on downstream analyses, and controlling such variables is therefore fundamental for the future use of biospecimens in personalized medicine for diagnostic or prognostic purposes.

What factors contribute to accurate test results in clinical laboratories?

There are pre-analytical, analytical and post analytical factors that contribute to accurate test results in clinical laboratories. Pre-analytical variables account for 32-75% of laboratory errors, and encompass the time from when thetest is ordered by the physician until the sample is ready for analysis.

What is the effect of preanalytical errors on the results?

Preanalytical errors may result in increased costs and delayed results, because replacement samples have to be collected at additional cost.