Sample Rejection Rate in Clinical Biochemistry Laboratory of a Tertiary Care Centre
Journal Title: International Journal Of Research In Medicine - Year 2016, Vol 5, Issue 4
Abstract
BACKGROUND: Recent publications have reported that up to 70 % of total laboratory errors occur in the pre analytical phase. Many times samples have to be rejected in laboratory without analysis. The common causes of rejection are; quantity not sufficient, hemolyzed samples, lipemic samples and samples in improper containers. AIMS AND OBJECTIVES: 1) To calculate the proportions of samples being rejected due to various pre analytical errors. 2) To enumerate the different reasons for rejection of samples. MATERIALS AND METHOD: This retrospective descriptive study was carried out on samples rejected over one year period from January 2015 to December 2015 in Clinical Biochemistry Laboratory of S.S.G. Hospital and Medical College Baroda, Gujarat. The source of data was Laboratory Information System (LIS) of our Clinical Biochemistry Laboratory. In our laboratory, tests requests, tests results and information of rejected samples are entered in LIS routinely. From this LIS data, the mean rejection rate was calculated. The types of rejection were categorized as: Insufficient volume of samples, Hemolyzed samples, Lipemic samples and samples in improper containers. RESULTS: A total 1,57,382 number of blood samples were received during the period of study(Jan-2015 to Dec-2015). Among these samples, 2315 blood samples were rejected .Total rejection rate was 1.47%.Most common cause for rejection was quantity not sufficient (78.83%) followed by hemolyzed samples (18.92%), lipemic samples (1.81%) and samples in improper container (0.43%). CONCLUSION: Among the patient samples included for one year period (Jan-2015 to Dec-2015) in our study, the maximum number of sample rejection was due to insufficient volume of sample received from different wards and OPDs.This is mainly due to lack of proper training of a person collecting the blood samples. Whenever a sample is rejected, a new sample has to be collected which increases turnaround time and thus affects patient care. The development of better blood collection procedures, training and interdepartmental communication can reduce these errors. Further studies should be performed after preventive and corrective actions to obtain a possible decrease in number of rejected samples.
Authors and Affiliations
Shubhra Jandial, Vasant Gosai
Keywords
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