Journal of Yeungnam Medical Science

Review article

Digital auscultation in clear and present threat of novel respiratory infectious disease: a narrative review: Heeeon Lee, Gun Kim, Jacob Sangwoon Bae; J Yeungnam Med Sci. 2025;42:19. Published online December 30, 2024; DOI: https://doi.org/10.12701/jyms.2025.42.19 [Epub ahead of print]

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Abstract PDF: The coronavirus disease 2019 pandemic has underscored the limitations of traditional diagnostic methods, particularly in ensuring the safety of healthcare workers and patients during infectious outbreaks. Smartphone-based digital stethoscopes enhanced with artificial intelligence (AI) have emerged as potential tools for addressing these challenges by enabling remote, efficient, and accessible auscultation. Despite advancements, most existing systems depend on additional hardware and external processing, increasing costs and complicating deployment. This review examines the feasibility and limitations of smartphone-based digital stethoscopes powered by AI, focusing on their ability to perform real-time analyses of audible and inaudible sound frequencies. We also explore the regulatory barriers, data storage challenges, and diagnostic accuracy issues that must be addressed to facilitate broader adoption. The implementation of these devices in veterinary medicine is discussed as a practical step toward refining their applications. With targeted improvements and careful consideration of existing limitations, smartphone-based AI stethoscopes could enhance diagnostic capabilities in human and animal healthcare settings.

Original Articles

Nephropathy related to computed tomography in emergency department patients with serum creatinine <1.5 mg/dL.: Jong Ha kim, Sin Youl Park, Chong Gun Kim; Yeungnam Univ J Med. 2015;32(2):90-97. Published online December 31, 2015; DOI: https://doi.org/10.12701/yujm.2015.32.2.90

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Abstract PDF: BACKGROUND
Contrast-induced nephropathy (CIN) can cause serious adverse effects. To reduce the occurrence of CIN related computed tomography (CT) in emergency patients, we assessed the respective roles of serum creatinine (SCr) alone and estimated glomerular filtration rate (eGFR) as an early predictor for CIN related CT. METHODS: For patients with SCr <1.5 mg/dL who underwent CT in emergency department (ED) between September 2012 and October 2013, we assessed the prevalence of CIN and its adverse effects. The Modification of Diet in Renal Disease Study (MDRD) and Cockcroft-Gault (CG) formula was used for the calculation of eGFR. Practical calculation was performed by electronic medical record (EMR) system for MDRD and internet calculating service for CG. And we investigated the prevalence of CIN in eGFR <60 mL/min/1.73 m2 before CT. RESULTS: A total of 1,555 patients were enrolled. The prevalence of CIN after CT was 4.6% and it showed correlation with renal deterioration, increased in-hospital mortality, and prolonged hospitalization. Despite baseline SCr <1.5 mg/dL, among enrolled patients, 11.3% as MDRD equation and 29.5% as CG formula were <60 mL/min/1.73 m2 and in this condition, the prevalence of CIN was significantly high (odds ratio was 2.87 [1.64-5.02] as MDRD equation and 2.03 [1.26-3.29] as CG formula). CONCLUSION: Just SCr <1.5mg/dL was not appropriate to recognize preexisting renal insufficiency, but eGFR using MDRD equation was useful in predicting the risk of CIN related CT in ED. Using EMR, calculation of eGFR can be easier and more convenient.

Early or Late Gefitinib, Which is Better for Survival?: Retrospective Analysis of 228 Korean Patients with Advanced or Metastatic NSCLC.: Dong Gun Kim, Min Kyoung Kim, Sung Hwa Bae, Sung Ae Koh, Sung Woo Park, Hyun Je Kim, Myung Jin Kim, Hyo Jin Jang, Kyung Hee Lee, Kwan Ho Lee, Jin Hong Chung, Kyung Chul Shin, Hun Mo Ryoo, Myung Soo Hyun; Yeungnam Univ J Med. 2011;28(1):31-44. Published online June 30, 2011; DOI: https://doi.org/10.12701/yujm.2011.28.1.31

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Abstract PDF: BACKGROUND
The optimal timing of treatment with EGFR-tyrosine kinase inhibitors (EGFR-TKI) in NSCLC patients has not yet been determined. METHODS: We separated 228 patients with advanced/metastatic NSCLC treated with gefitinib into an early gefitinib group (patients who received gefitinib as first- or second-line treatment) and a delayed gefitinib group (patients who received gefitinib as third or fourth-line treatment) and attempted to determine whether the timing of gefitinib treatment affected clinical outcomes. RESULTS: Median overall survival (OS), progression free survival (PFS), and median OS from first-line treatment of advanced/metastatic disease (OSt) for 111 patients in the early gefitinib group were 6.2 months, 3.3 months, and 11.6 months. However, median OS, PFS, and OSt for 84 patients in the delayed gefitinib group were 7.8 months, 2.3 months, and 22.7 months. No differences in OS and PFS were observed between the 2 groups. However, OSt was significantly longer in the delayed gefitnib group. Timing of gefitinib therapy was one of the independent predictors of OSt. Hb > or = 10 g/dl, and having never smoked, and ECOG performance status < or =1 were independent predictors of better PFS. CONCLUSION: Deferral of gefitinib therapy in patients with advanced or metastatic NSCLC may be preferable if they are able to tolerate chemotherapy.

Case Report

A Case of Tarsal Bone Tuberculosis in a Patient with Polycythemia Vera.: Sung Ae Koh, Se Hun Shon, Dong Gun Kim, Sung Woo Park, Choong Ki Lee, Kyung Hee Lee, Min Kyoung Kim, Myung Soo Hyun; Yeungnam Univ J Med. 2009;26(1):44-48. Published online June 30, 2009; DOI: https://doi.org/10.12701/yujm.2009.26.1.44

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Abstract PDF: Talus tuberculosis is a rare disease, even in an endemic tuberculosis area. In reviews of the worldwide literature, only 18 cases of talus tuberculosis have been reported. Recently, we experienced a case of a 70-year-old polycythemia vera patient with right metatarsopharyngeal joint pain for 2 months duration who was diagnosed with talus tuberculosis with prostate involvement. Tuberculosis should be considered as one of the causes of monoarticulitis, especially in countries, where the disease is endemic. Additionally, we highly recommend taking a biopsy of the site of suspected infection because an early diagnosis is the key to successful treatment.

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