THE KEY TO QUALITY LABORATORY RESULTS

Introduction:

For the key to quality laboratory results, the accuracy and reliability of laboratory test results depend on the quality of the sample collected. A well-collected sample is essential for obtaining reliable and meaningful results. In this article, we will discuss the importance of ideal sample collection, using blood, sputum, urine, and stool samples as examples. Learn more

Characteristics of an Ideal Sample:

An ideal sample should possess the following characteristics:

• Correct patient identification: Ensure the sample is labeled correctly with the patient’s name, OPD number, and date of sampling.
• Proper collection technique: Use the recommended collection method and equipment to minimize contamination; avoid clotting and hemolysis, and ensure the sample is representative of the patient’s condition.
• Adequate volume: Collect sufficient sample volume to perform the required tests.
• Correct storage and transportation: Store and transport the sample according to the laboratory’s guidelines to prevent degradation or contamination.

A proper and relevant test ‘RECOMMENDATION’ should be made on the LHIMS for every sample sent for testing and on the request forms where necessary.

Sample-Specific Considerations:

Different types of samples have unique requirements:

• Blood samples: Ensure proper venipuncture technique, use the correct anticoagulant, and store the sample at the recommended temperature.
• Sputum samples: Collect sputum in a sterile container, avoid saliva contamination, and store the sample at room temperature. Saliva is a lousy sample for analysis.
• Urine samples: Collect midstream urine in a sterile container, avoid contamination with toilet paper or soap, and store the sample at room temperature. The sample must be sent to the lab without delay.
• Stool samples: Collect stool in a sterile container, avoid contamination with urine or water, and store the sample at room temperature.

Rejection and Re-Sampling:

Samples that do not meet the ideal sample acceptance criteria shall be:

• Rejected: Samples that are contaminated, clotted, hemolysed, mislabeled, or insufficient in volume will not be analyzed.
• Discarded: Rejected samples shall be discarded according to laboratory protocols.
• Re-sampled: A new sample from the patient shall be requested.

Kindly call on the Lab or other professionals for assistance where there are challenges in performing venipuncture.

General Importance of collecting the ideal sample for laboratory testing:

1. Accurate test results: Good samples ensure accurate test results, which inform diagnosis, treatment, and patient care.
2. Prevention of misdiagnosis: Reliable samples prevent misdiagnosis, which can lead to inappropriate treatment, delayed diagnosis, or worsening of the condition.
3. Optimization of treatment: Good samples enable healthcare providers to optimize treatment plans, improving patient outcomes and reducing healthcare costs.
4. Reduced need for repeat testing: Good samples reduce the need for repeat testing, saving time, resources, and reducing patient discomfort.

Conclusion:

By ensuring that samples meet the ideal sample acceptance criteria, laboratories can guarantee accurate and reliable results. Remember, a well-collected sample is the foundation of quality laboratory testing. For more blogpost click here

Article by:

DAWUD ABDUL QAYYUM(MEDICAL LABORATORY SCIENTIST)

QUALITY MANAGER(TAIN DISTRICT HOSPITAL LAB)