What is pre analytical laboratory procedure?
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 are the three phases of laboratory testing?
Total testing process in the laboratory is a cyclical process divided into three phases: preanalytical, analytical and postanalytical.
What is pre analytical analytical and post-analytical?
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 does post-analytical mean?
The post-analytical phase is the final phase of the total testing process and involves evaluation of laboratory test results; release of test results in a timely manner to appropriate individuals, particularly critical results; and modification, annotation or revocation of results as necessary to support clinical …
What are preanalytical errors?
The preanalytical errors refer to all of the inappropriate performances before the specimens are measured by analyzers, such as improper sample collection, transport delays, illegible handwriting on requisition, and so on.
Which is an example of a preanalytical error?
The most commonly reported types of pre-analytical error are: a) missing sample and/or test request, b) wrong or missing identification, c) contamination from infusion route, d) haemolysed, clotted, and insufficient samples, e) inappropriate containers, f) inappropriate blood to anticoagulant ratio, and g) …
Which lab result has a negative or positive value?
Positive: The lab found whatever your doctor was testing for. So if you had a test for strep throat, testing positive means you do have strep throat. Negative: The lab didn’t find whatever you were tested for.
What is a preanalytical error?
What are examples of analytical errors?
Some examples of analytical errors include equipment malfunction, procedures (i.e., standard operating procedures and assay instructions) not followed, undetected failure of quality control, sample mixups, and test interference.
How do you prevent preanalytical errors?
“Other measures for avoiding preanalytical errors that have proven successful are: never accept an unlabelled sample. Never allow unlabelled or mislabeled samples to be relabeled, if recollection is feasible.” “Document relabeling must be approved by an attending physician, with results footnoted.
What are the common pre-analytical errors?
How can preanalytical errors be reduced?
Steps labs can take: minimizing pre-analytical errors
- Phlebotomy education.
- Using appropriate technology.
- Choosing appropriate products.
- Adhering to standard guidelines.
- Developing clear, written procedures.
- Validating any new instrument or procedure.
- Monitoring quality indicators in the lab.
How common are blood test errors?
It is estimated that seven to ten million patients receive an inaccurate blood test result annually. Approximately 35,000 labs run high complexity tests. Many more run routine tests and are not subject to inspection every two years by federal regulators.
How do you read lab test results?
Lab results are often shown as a set of numbers known as a reference range….Your lab results may also include one of these terms:
- Negative or normal, which means the disease or substance being tested was not found.
- Positive or abnormal, which means the disease or substance was found.
What’s the most critical error a phlebotomist can make?
The most serious error is failure to properly identify the patient. Even if everything else is done perfectly, the final result will not apply to the patient incorrectly presumed to be the source.
Why is pre analytical phase important?
The preanalytic phase is an important component of total laboratory quality. A wide range of variables that affect the result for a patient from whom a specimen of blood or body fluid has been collected, including the procedure for collection, handling, and processing before analysis, constitute the preanalytic phase.