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Van-The Vo,Youngju Gwon,Viet-Duc Phung,Young-Don Son,Jong-Hoon Kim,Sang-Wha Lee 대한금속·재료학회 2021 ELECTRONIC MATERIALS LETTERS Vol.17 No.3
The sensitive detection of various neurotransmitters is very useful in diagnosing diseases related to the dysfunction of theneurotransmitter system. Surface-enhanced Raman scattering (SERS) is one of the best methods for bio-analyte detectionas it provides a molecular fi ngerprint at a trace concentration level. In this study, Ag-deposited porous silicon (Ag@pSi)was fabricated as a SERS-active substrate via metal-assisted chemical etching and electroless plating methods. Dopamine(DA) and norepinephrine (NE) neurotransmitters were tested as probing analytes. The Ag@pSi substrate demonstrated thesensitive detection of the neurotransmitters (DA and NE) over the wide concentration range (from 10 6 to 10 10 M), witha good linearity between the intensity of specifi c Raman peak and the log-scale concentration. The Ag@pSi substrate alsodistinguished the individual analytes in a mixture of DA and NE at 10 8 M, confi rming the effi cacy of the developed SERSsubstrate for the selective detection of neurotransmitters.
Development of a Systematic Quality Control Program for Point-of-Care Glucose Testing
Yong Hun Jo,Sooin Choi,Jae Joon Lee,Jeong Gwon Kim,Yong-Wha Lee 대한임상검사정도관리협회 2023 Journal of Laboratory Medicine And Quality Assuran Vol.45 No.3
Background: While glucose point-of-care testing (POCT) is widely utilized, it is often carried out by clinical staff who may lack specific test-related training, potentially leading to inadequate quality control (QC) procedures. This study aimed to establish a comprehensive quality management system for glucose POCT. Methods: We implemented a systematic approach encompassing quality assurance, equipment maintenance, operator training, and competency assessment in alignment with the Clinical and Laboratory Standards Institute guidelines POCT12-A3. To facilitate structured internal QC, the results of glucose POCT were automatically analyzed within the laboratory information system (LIS). An adjusted acceptable range was defined as mean±2 standard deviations (SD) based on 1 month of QC result analysis operator performance was enhanced through a tailored training program, and proficiency tests were conducted on all glucometers to assess competency. Results: Leveraging the LIS allowed the application of quality control rules to glucose POCT, enabling swift error identification and response. Analysis of one month’s QC results revealed that for high-concentration samples, the warning rate using the adjusted range was significantly higher than that using the provided range (1.1% vs. 2.7%, P <0.01). A maintenance schedule was established, encompassing monthly upkeep for glucometers and collective replacement of all QC materials every 3 months. Operator training was facilitated through both face-to-face education and instructional videos. During proficiency testing, four devices initially exhibited deviations beyond 3SD, which were subsequently rectified upon re-examination. Conclusions: The implementation of a systematic and efficient quality control system, as demonstrated in this study, holds the potential to yield accurate and dependable glucose POCT results.