1.Pharmacological properties of Technekitty injection (Tc-99m) in diagnosing feline hyperthyroidism
Jae Cheong LIM ; So-Young LEE ; Eun Ha CHO ; Yu Mi JUNG ; Ki Hwan PARK ; Young Uk PARK ; Sung Soo NAM ; Tae Hoon LEE ; Jae Won LEE ; Jisu SUN ; Hye Kyung CHUNG ; Yong Jin LEE ; Yeon CHAE ; Byeong-Teck KANG
Journal of Biomedical and Translational Research 2024;25(4):185-199
Thyroid scanning using technetium-99m ( 99mTc) is the gold standard for diagnosing feline hyperthyroidism. In cats with an overactive thyroid, a thyroid scan is the most appropriate imaging technique to detect and localize any hyperfunctional adenomatous thyroid tissue. In this study, the pharmacological properties of the Technekitty injection (Tc-99m), developed as a diagnostic agent for feline hyperthyroidism using 99mTc as an active ingredient, were tested in FRTL-5 thyroid follicular cell line and ICR mice. The percentage of cell uptake of the Tc-99m in FRTL-5 thyroid cells was 0.182 ± 0.018%, which was about 6 times higher compared to Clone 9 hepatocytes. This uptake decreased by 38.2% due to competitive inhibition by iodine (sodium iodide). In tissue distribution tests by using ICR mice, the highest distribution was observed in the liver, kidneys, spleen, lungs, and femur at 0.083 hours after administration, and this distribution decreased as the compound was excreted through the kidneys, the pri-mary excretory organ. Maximum distribution was confirmed at 1 hour in the small intestine, 6hours in the large intestine, and 2 hours in the thyroid gland. Additionally, the total amount excreted through urine and feces over 48 hours (2 days) was 78.80% of the injected dose, with 37.70% (47.84% of the total excretion) excreted through urine and 41.10% (52.16% of the total excretion) through feces. In conclusion, the Tc-99m has the same mechanism of action, potency, absorption, distribution, metabolism, and excretion characteristics as 99mTc used for feline hyperthyroidism in the United States, Europe, and other countries, because the Technekitty injection (Tc-99m) contains 99mTc as its sole active ingredient. Based on these results, the Technekitty injection (Tc-99m) is expected to be safely used in the clinical diagnosis of feline hyperthyroidism.
2.Occupation classification model based on DistilKoBERT: using the 5th and 6th Korean Working Condition Surveys
Tae-Yeon KIM ; Seong-Uk BAEK ; Myeong-Hun LIM ; Byungyoon YUN ; Domyung PAEK ; Kyung Ehi ZOH ; Kanwoo YOUN ; Yun Keun LEE ; Yangho KIM ; Jungwon KIM ; Eunsuk CHOI ; Mo-Yeol KANG ; YoonHo CHO ; Kyung-Eun LEE ; Juho SIM ; Juyeon OH ; Heejoo PARK ; Jian LEE ; Jong-Uk WON ; Yu-Min LEE ; Jin-Ha YOON
Annals of Occupational and Environmental Medicine 2024;36(1):e19-
Accurate occupation classification is essential in various fields, including policy development and epidemiological studies. This study aims to develop an occupation classification model based on DistilKoBERT. This study used data from the 5th and 6th Korean Working Conditions Surveys conducted in 2017 and 2020, respectively. A total of 99,665 survey participants, who were nationally representative of Korean workers, were included. We used natural language responses regarding their job responsibilities and occupational codes based on the Korean Standard Classification of Occupations (7th version, 3-digit codes). The dataset was randomly split into training and test datasets in a ratio of 7:3. The occupation classification model based on DistilKoBERT was fine-tuned using the training dataset, and the model was evaluated using the test dataset. The accuracy, precision, recall, and F1 score were calculated as evaluation metrics. The final model, which classified 28,996 survey participants in the test dataset into 142 occupational codes, exhibited an accuracy of 84.44%. For the evaluation metrics, the precision, recall, and F1 score of the model, calculated by weighting based on the sample size, were 0.83, 0.84, and 0.83, respectively. The model demonstrated high precision in the classification of service and sales workers yet exhibited low precision in the classification of managers. In addition, it displayed high precision in classifying occupations prominently represented in the training dataset. This study developed an occupation classification system based on DistilKoBERT, which demonstrated reasonable performance. Despite further efforts to enhance the classification accuracy, this automated occupation classification model holds promise for advancing epidemiological studies in the fields of occupational safety and health.
3.Occupation classification model based on DistilKoBERT: using the 5th and 6th Korean Working Condition Surveys
Tae-Yeon KIM ; Seong-Uk BAEK ; Myeong-Hun LIM ; Byungyoon YUN ; Domyung PAEK ; Kyung Ehi ZOH ; Kanwoo YOUN ; Yun Keun LEE ; Yangho KIM ; Jungwon KIM ; Eunsuk CHOI ; Mo-Yeol KANG ; YoonHo CHO ; Kyung-Eun LEE ; Juho SIM ; Juyeon OH ; Heejoo PARK ; Jian LEE ; Jong-Uk WON ; Yu-Min LEE ; Jin-Ha YOON
Annals of Occupational and Environmental Medicine 2024;36(1):e19-
Accurate occupation classification is essential in various fields, including policy development and epidemiological studies. This study aims to develop an occupation classification model based on DistilKoBERT. This study used data from the 5th and 6th Korean Working Conditions Surveys conducted in 2017 and 2020, respectively. A total of 99,665 survey participants, who were nationally representative of Korean workers, were included. We used natural language responses regarding their job responsibilities and occupational codes based on the Korean Standard Classification of Occupations (7th version, 3-digit codes). The dataset was randomly split into training and test datasets in a ratio of 7:3. The occupation classification model based on DistilKoBERT was fine-tuned using the training dataset, and the model was evaluated using the test dataset. The accuracy, precision, recall, and F1 score were calculated as evaluation metrics. The final model, which classified 28,996 survey participants in the test dataset into 142 occupational codes, exhibited an accuracy of 84.44%. For the evaluation metrics, the precision, recall, and F1 score of the model, calculated by weighting based on the sample size, were 0.83, 0.84, and 0.83, respectively. The model demonstrated high precision in the classification of service and sales workers yet exhibited low precision in the classification of managers. In addition, it displayed high precision in classifying occupations prominently represented in the training dataset. This study developed an occupation classification system based on DistilKoBERT, which demonstrated reasonable performance. Despite further efforts to enhance the classification accuracy, this automated occupation classification model holds promise for advancing epidemiological studies in the fields of occupational safety and health.
4.Pharmacological properties of Technekitty injection (Tc-99m) in diagnosing feline hyperthyroidism
Jae Cheong LIM ; So-Young LEE ; Eun Ha CHO ; Yu Mi JUNG ; Ki Hwan PARK ; Young Uk PARK ; Sung Soo NAM ; Tae Hoon LEE ; Jae Won LEE ; Jisu SUN ; Hye Kyung CHUNG ; Yong Jin LEE ; Yeon CHAE ; Byeong-Teck KANG
Journal of Biomedical and Translational Research 2024;25(4):185-199
Thyroid scanning using technetium-99m ( 99mTc) is the gold standard for diagnosing feline hyperthyroidism. In cats with an overactive thyroid, a thyroid scan is the most appropriate imaging technique to detect and localize any hyperfunctional adenomatous thyroid tissue. In this study, the pharmacological properties of the Technekitty injection (Tc-99m), developed as a diagnostic agent for feline hyperthyroidism using 99mTc as an active ingredient, were tested in FRTL-5 thyroid follicular cell line and ICR mice. The percentage of cell uptake of the Tc-99m in FRTL-5 thyroid cells was 0.182 ± 0.018%, which was about 6 times higher compared to Clone 9 hepatocytes. This uptake decreased by 38.2% due to competitive inhibition by iodine (sodium iodide). In tissue distribution tests by using ICR mice, the highest distribution was observed in the liver, kidneys, spleen, lungs, and femur at 0.083 hours after administration, and this distribution decreased as the compound was excreted through the kidneys, the pri-mary excretory organ. Maximum distribution was confirmed at 1 hour in the small intestine, 6hours in the large intestine, and 2 hours in the thyroid gland. Additionally, the total amount excreted through urine and feces over 48 hours (2 days) was 78.80% of the injected dose, with 37.70% (47.84% of the total excretion) excreted through urine and 41.10% (52.16% of the total excretion) through feces. In conclusion, the Tc-99m has the same mechanism of action, potency, absorption, distribution, metabolism, and excretion characteristics as 99mTc used for feline hyperthyroidism in the United States, Europe, and other countries, because the Technekitty injection (Tc-99m) contains 99mTc as its sole active ingredient. Based on these results, the Technekitty injection (Tc-99m) is expected to be safely used in the clinical diagnosis of feline hyperthyroidism.
5.Occupation classification model based on DistilKoBERT: using the 5th and 6th Korean Working Condition Surveys
Tae-Yeon KIM ; Seong-Uk BAEK ; Myeong-Hun LIM ; Byungyoon YUN ; Domyung PAEK ; Kyung Ehi ZOH ; Kanwoo YOUN ; Yun Keun LEE ; Yangho KIM ; Jungwon KIM ; Eunsuk CHOI ; Mo-Yeol KANG ; YoonHo CHO ; Kyung-Eun LEE ; Juho SIM ; Juyeon OH ; Heejoo PARK ; Jian LEE ; Jong-Uk WON ; Yu-Min LEE ; Jin-Ha YOON
Annals of Occupational and Environmental Medicine 2024;36(1):e19-
Accurate occupation classification is essential in various fields, including policy development and epidemiological studies. This study aims to develop an occupation classification model based on DistilKoBERT. This study used data from the 5th and 6th Korean Working Conditions Surveys conducted in 2017 and 2020, respectively. A total of 99,665 survey participants, who were nationally representative of Korean workers, were included. We used natural language responses regarding their job responsibilities and occupational codes based on the Korean Standard Classification of Occupations (7th version, 3-digit codes). The dataset was randomly split into training and test datasets in a ratio of 7:3. The occupation classification model based on DistilKoBERT was fine-tuned using the training dataset, and the model was evaluated using the test dataset. The accuracy, precision, recall, and F1 score were calculated as evaluation metrics. The final model, which classified 28,996 survey participants in the test dataset into 142 occupational codes, exhibited an accuracy of 84.44%. For the evaluation metrics, the precision, recall, and F1 score of the model, calculated by weighting based on the sample size, were 0.83, 0.84, and 0.83, respectively. The model demonstrated high precision in the classification of service and sales workers yet exhibited low precision in the classification of managers. In addition, it displayed high precision in classifying occupations prominently represented in the training dataset. This study developed an occupation classification system based on DistilKoBERT, which demonstrated reasonable performance. Despite further efforts to enhance the classification accuracy, this automated occupation classification model holds promise for advancing epidemiological studies in the fields of occupational safety and health.
6.Pharmacological properties of Technekitty injection (Tc-99m) in diagnosing feline hyperthyroidism
Jae Cheong LIM ; So-Young LEE ; Eun Ha CHO ; Yu Mi JUNG ; Ki Hwan PARK ; Young Uk PARK ; Sung Soo NAM ; Tae Hoon LEE ; Jae Won LEE ; Jisu SUN ; Hye Kyung CHUNG ; Yong Jin LEE ; Yeon CHAE ; Byeong-Teck KANG
Journal of Biomedical and Translational Research 2024;25(4):185-199
Thyroid scanning using technetium-99m ( 99mTc) is the gold standard for diagnosing feline hyperthyroidism. In cats with an overactive thyroid, a thyroid scan is the most appropriate imaging technique to detect and localize any hyperfunctional adenomatous thyroid tissue. In this study, the pharmacological properties of the Technekitty injection (Tc-99m), developed as a diagnostic agent for feline hyperthyroidism using 99mTc as an active ingredient, were tested in FRTL-5 thyroid follicular cell line and ICR mice. The percentage of cell uptake of the Tc-99m in FRTL-5 thyroid cells was 0.182 ± 0.018%, which was about 6 times higher compared to Clone 9 hepatocytes. This uptake decreased by 38.2% due to competitive inhibition by iodine (sodium iodide). In tissue distribution tests by using ICR mice, the highest distribution was observed in the liver, kidneys, spleen, lungs, and femur at 0.083 hours after administration, and this distribution decreased as the compound was excreted through the kidneys, the pri-mary excretory organ. Maximum distribution was confirmed at 1 hour in the small intestine, 6hours in the large intestine, and 2 hours in the thyroid gland. Additionally, the total amount excreted through urine and feces over 48 hours (2 days) was 78.80% of the injected dose, with 37.70% (47.84% of the total excretion) excreted through urine and 41.10% (52.16% of the total excretion) through feces. In conclusion, the Tc-99m has the same mechanism of action, potency, absorption, distribution, metabolism, and excretion characteristics as 99mTc used for feline hyperthyroidism in the United States, Europe, and other countries, because the Technekitty injection (Tc-99m) contains 99mTc as its sole active ingredient. Based on these results, the Technekitty injection (Tc-99m) is expected to be safely used in the clinical diagnosis of feline hyperthyroidism.
7.Risk Factors for Subsequent Contralateral Hip Fracture following Osteoporotic Hip Fracture Surgery
Kyung-Jae LEE ; Jung-Hoon CHOI ; Hee-Uk YE ; Young-Hun KIM ; Kyung-Hwan LIM
Journal of the Korean Fracture Society 2021;34(2):51-56
Purpose:
This study examined the risk factors contributing to subsequent hip fractures in patients with osteoporotic hip fractures.
Materials and Methods:
Between March 2008 and February 2016, 68 patients sustained a subsequent contralateral hip fracture after surgery for a primary osteoporotic hip fracture (Study group). The patients were compared with 475 patients who had been followed up for a minimum of one year with a unilateral osteoporotic hip fracture (Control group). The demographic data, bone mineral density (BMD), osteoporosis medication, osteoporotic fracture history, comorbid disease, type of surgery, preoperative, postoperative ambulatory capacity, and postoperative delirium in the two groups were compared.
Results:
The demographic data, BMD, osteoporosis medication history, comorbid disease, type of surgery, and postoperative delirium were similar in the two groups. At three months after the primary surgery, the poor ambulatory capacity was significantly higher in the study group than the control group (p<0.001).
Conclusion
The ambulatory capacity after primary surgery is an important risk factor in the occurrence of subsequent hip fractures after osteoporotic hip fracture. Cause analysis regarding the poor ambulatory capacity after surgery will be necessary, and the development of a functional recovery program and careful management of the walking ability recovery will be needed.
8.Clinical Outcomes and Radiologic Characteristics of Insufficiency Femoral Neck Fracture in Elderly Patients
Hee-Uk YE ; Kyung-Jae LEE ; Byung-Woo MIN ; Kyung-Hwan LIM ; Beom-Soo KIM ; Young-Hoon KIM
Journal of the Korean Fracture Society 2021;34(1):1-7
Purpose:
In elderly patients, femoral neck insufficiency fractures that occur without a history of trauma are difficult to diagnose and treat, so it is emphasized that early suspicion of fractures and additional diagnostic tests are conducted.
Materials and Methods:
Between December 2010 to December 2019, 12 femoral neck insufficiency fractures (group 1) were evaluated by comparing them with 50 traumatic femoral neck fractures of a similar age. Along with demographic data, neck cortical thickness, shaft cortical thickness, head diameter, neck width, trochanter width, shaft width, neck-shaft angle, hip axis length, femoral neck index on the simple radiographic image were compared.
Results:
Seven of the 12 cases were non-displaced fractures, and it took an average of 19.2 days to diagnose the fracture after the symptoms occurred. The height was smaller than the control group at 149.1 cm in group 1 and 157.2 cm in group 2 (p<0.001). The cortical thickness of the medial femoral neck showed significant differences between the two groups: 3.16 mm in group 1 and 4.11 mm in group 2 (p=0.004). There was no statistical difference in the other measurements.
Conclusion
Femoral neck insufficiency fracture often has a delayed diagnosis because of the characteristics of the fracture. The cortical thickness of the medial femoral neck in simple radiographic images can help suspect femoral insufficiency fractures in elderly patients when considered with detailed medical history taking and a physical examination.
9.Risk Factors for Subsequent Contralateral Hip Fracture following Osteoporotic Hip Fracture Surgery
Kyung-Jae LEE ; Jung-Hoon CHOI ; Hee-Uk YE ; Young-Hun KIM ; Kyung-Hwan LIM
Journal of the Korean Fracture Society 2021;34(2):51-56
Purpose:
This study examined the risk factors contributing to subsequent hip fractures in patients with osteoporotic hip fractures.
Materials and Methods:
Between March 2008 and February 2016, 68 patients sustained a subsequent contralateral hip fracture after surgery for a primary osteoporotic hip fracture (Study group). The patients were compared with 475 patients who had been followed up for a minimum of one year with a unilateral osteoporotic hip fracture (Control group). The demographic data, bone mineral density (BMD), osteoporosis medication, osteoporotic fracture history, comorbid disease, type of surgery, preoperative, postoperative ambulatory capacity, and postoperative delirium in the two groups were compared.
Results:
The demographic data, BMD, osteoporosis medication history, comorbid disease, type of surgery, and postoperative delirium were similar in the two groups. At three months after the primary surgery, the poor ambulatory capacity was significantly higher in the study group than the control group (p<0.001).
Conclusion
The ambulatory capacity after primary surgery is an important risk factor in the occurrence of subsequent hip fractures after osteoporotic hip fracture. Cause analysis regarding the poor ambulatory capacity after surgery will be necessary, and the development of a functional recovery program and careful management of the walking ability recovery will be needed.
10.Hospital-Based Case Management for Suicide High-Risk Group Using Delphi Survey
Hwan LEE ; Jeungsuk LIM ; Sang Min LEE ; Soung Nam KIM ; Haewoo LEE ; Kyoung-Uk LEE ; Boung Chul LEE ; Hwa-Young LEE ; Jong-Woo PAIK
Psychiatry Investigation 2021;18(10):986-996
Objective:
As of 2019, suicide is serious problem in Korea, with the highest suicide rate among OECD countries. To reduce suicide rates Emergency Department Based Post-Suicide Attempt Case Management carried out with government funding in South Korea, but it is insufficient to address the issue. Aim of this study is to prevent suicide attempts through continuous provision of mental health services even after discharge from acute care.
Methods:
We selected 15 mental health specialists who are multidisciplinary experts in Suicide Prevention. Two-round Delphi survey was conducted on them to reach an agreement for hospital-based case management.
Results:
The first Delphi survey consisted of 8 areas and 39 questions. Among them, 30 questions draw agreement above the reference value. The second Delphi survey, consisted of 37 questions, resulted in 32 above-standard questions.
Conclusion
Consensus was reached in most category of the Hospital Based Case Management for Suicide High-Risk Group. Core of the developed plan was to provide services to patients who visited the hospital, pursue the stability and universalization of services through a medical insurance fee system. In the future, hospital-based case management service will be implemented as a new model contributing to the reduction of suicide rates in Korea.

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