Journal of Yeungnam Medical Science

Original articles

Effect of prehydration solution on hearing threshold after chemotherapy in patients with head and neck cancers: a retrospective study: Dongbin Ahn, Kyu-Yup Lee, Eunjung Oh, Minji Oh, Boseung Jung, Da Jung Jung; J Yeungnam Med Sci. 2023;40(2):164-171. Published online August 24, 2022; DOI: https://doi.org/10.12701/jyms.2022.00276; Funded: Kyungpook National University Hospital

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Abstract PDF: Background
The study aimed to evaluate the effect of prehydration solution on hearing thresholds after cisplatin chemotherapy.
Methods
In this retrospective cohort study, we reviewed the data of patients who underwent ≥3 courses of cisplatin-based chemotherapy for locally advanced head and neck cancers at a tertiary referral center (n=64). The dextrose solution (DW) group (n=26) received 2 L of normal saline and 1 L of 5% dextrose. The Hartmann solution (HS) group (n=38) received 2 L of normal saline and 1 L of HS. Hearing data were measured 1 day before starting the first course of chemotherapy, and again 20 days after the first, second, and third courses of chemotherapy. The severity of hearing loss was evaluated using the Common Terminology Criteria for Adverse Events (CTCAE).
Results
Thresholds at all frequencies after chemotherapy were greater in the DW group than in the HS group. The increase in thresholds in 1 to 4 kHz after the third course of chemotherapy was greater in the DW group than in the HS group. CTCAE grades after the second and third courses of chemotherapy were greater in the DW group than in the HS group. Logistic regression showed that the odds ratio for CTCAE grade 3 or 4 after the third course of chemotherapy in the DW group was 4.84 on univariate analysis.
Conclusion
Prehydration using a solution with salt was associated with a decrease in change in hearing thresholds after cisplatin chemotherapy in patients with head and neck cancers.

Pediatricians’ perception of factors concerning the clinical application of blockchain technology to pediatric health care: a questionnaire survey: Yong Sauk Hau, Min Cheol Chang, Jae Chan Park, Young Joo Lee, Seong Su Kim, Jae Min Lee; J Yeungnam Med Sci. 2023;40(2):156-163. Published online July 18, 2022; DOI: https://doi.org/10.12701/jyms.2022.00241; Funded: Yeungnam University

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Abstract PDF Supplementary Material: Background
Interest in digital medical information has increased because it allows doctors to easily access a patient’s medical records and provide appropriate medical care. Blockchain technology ensures data safety, reliability, integrity, and transparency by distributing medical data to all users over a peer-to-peer network. This study attempted to assess pediatricians’ thoughts and attitudes toward introducing blockchain technology into the medical field.
Methods
This study used a questionnaire survey to examine the thoughts and attitudes of 30- to 60-year-old pediatricians regarding the introduction of blockchain technology into the medical field. Responses to each item were recorded on a scale ranging from 1 (never agree) to 7 (completely agree).
Results
The scores for the intentions and expectations of using blockchain technology were 4.0 to 4.6. Pediatricians from tertiary hospitals responded more positively (4.5–4.9) to the idea of using blockchain technology for hospital work relative to the general population (4.3–4.7). However, pediatricians working in primary and secondary hospitals had a slightly negative view of the application of blockchain technology to hospital work (p=0.018).
Conclusion
When introducing the medical records of related pediatric and adolescent patients using blockchain technology in the future, it would be better to conduct a pilot project that prioritizes pediatricians in tertiary hospitals. The cost, policy, and market participants’ perceptions are essential factors to consider when introducing technology in the medical field.

Resident fellow section: Teaching images

Right arm pain after strength training: ultrasound imaging for pectoralis major tendon strain: Ting-Yu Lin, Ke-Vin Chang, Wei-Ting Wu, Levent Özçakar; J Yeungnam Med Sci. 2023;40(1):109-111. Published online October 25, 2022; DOI: https://doi.org/10.12701/jyms.2022.00626; Funded: National Taiwan University Hospital, Ministry of Science and Technology, Taiwan, Taiwan Society of Ultrasound in Medicine

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Image vignette

Tarsal tunnel syndrome due to talocalcaneal coalition: Chul Hyun Park, Mathieu Boudier-Revéret, Min Cheol Chang; J Yeungnam Med Sci. 2023;40(1):106-108. Published online October 5, 2021; DOI: https://doi.org/10.12701/yujm.2021.01473; Funded: National Research Foundation of Korea

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Citations

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Deep-Learning Algorithms for Prescribing Insoles to Patients with Foot Pain
Jeoung Kun Kim, Yoo Jin Choo, In Sik Park, Jin-Woo Choi, Donghwi Park, Min Cheol Chang
Applied Sciences.2023; 13(4): 2208. CrossRef

Case reports

Diagnosis and successful visual biofeedback therapy using fiberoptic endoscopic evaluation of swallowing in a young adult patient with psychogenic dysphagia: a case report: Youngmo Kim, Sang Hun Han, Yong Beom Shin, Jin A Yoon, Sang Hun Kim; J Yeungnam Med Sci. 2023;40(1):91-95. Published online January 13, 2022; DOI: https://doi.org/10.12701/yujm.2021.01543; Funded: Pusan National University Hospital

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Abstract PDF: Psychogenic dysphagia is a deglutition disorder characterized by a fear of swallowing, with no structural or functional causes. This report presents the case of a young male patient who had severe malnutrition due to psychogenic dysphagia and was provided visual biofeedback using fiberoptic endoscopic evaluation of swallowing (FEES). A healthy 25-year-old man presented to our clinic with a complaint of throat discomfort when swallowing that had started 6 months prior. As the symptoms worsened, he became fearful of food spreading to his lungs after swallowing and the development of respiratory difficulties. His food intake gradually decreased, resulting in a weight loss of 20 kg within 2 months. Evaluation of organic and other functional causes of dysphagia was performed, but no abnormalities were detected. The sensation of a lump in his throat, fear of swallowing, and anxiety were transformed into somatic symptoms. The patient was diagnosed with psychogenic dysphagia. After visual biofeedback by a physician who performed FEES, the patient resumed eating normally and increased his food intake. If routine tests do not reveal structural or functional causes of dysphagia, assessment of a psychogenic swallowing disorder should be considered. FEES can help in the diagnosis and management of psychogenic dysphagia.

Scrotal pyocele secondary to gastrointestinal perforation in infants: a case series: Soo-Hong Kim, Yong-Hoon Cho, Hae-Young Kim, Narae Lee, Young Mi Han, Shin Yun Byun; J Yeungnam Med Sci. 2023;40(1):86-90. Published online December 15, 2021; DOI: https://doi.org/10.12701/yujm.2021.01508; Funded: Pusan National University Yangsan Hospital

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Abstract PDF: Pyocele in infants is rarely described in the literature, but it is an emergent condition that requires rapid recognition and treatment to prevent testicular loss. If peritonitis due to gastrointestinal perforation occurs, abdominal contamination may spread through a patent processus vaginalis in an infant, which may lead to pyocele. We report the cases of three infants with scrotal pyocele due to the spread of infection or inflammatory material from the intraperitoneal cavity through a patent processus vaginalis. Two infants were surgically treated, while the other was treated with percutaneous aspiration and intravenous antibiotic administration. Although rare, pyocele should be considered in the differential diagnosis of acute scrotum in infants, especially in infants who previously had peritonitis due to gastrointestinal perforation.

Original articles

Satisfaction of industrial health care managers regarding the work of industrial hygiene engineers: a cross-sectional study: Byung Sik Choi, Min Keun Kim, Joon Sakong; J Yeungnam Med Sci. 2023;40(1):58-64. Published online May 24, 2022; DOI: https://doi.org/10.12701/jyms.2022.00073; Funded: Chunma Medical Research Foundation

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Abstract PDF: Background
A group health service is a system that delegates workplace health management to an entrusted institution. There have been various studies on group health services to date, but recent changes, such as an increase in foreign workers, are rapidly changing industry characteristics.
Methods
Satisfaction was assessed using a 27-question survey distributed among 203 workplaces employing health professionals. The survey items consisted of general characteristics, comprehensive satisfaction, requirements for health professionals’ work, and satisfaction with work environment management, ergonomic management, and healthcare management. Multiple regression and frequency analyses were performed.
Results
The comprehensive satisfaction was 4.08 points on average, out of 5. The comprehensive satisfaction of health professionals in the industry was positively correlated with each factor. Hazardous materials and chemical management (material safety data sheets, MSDSs) were the most common requirements.
Conclusion
A low level of satisfaction with work environment management indicates high demand for healthcare management. The working environment should be improved by identifying characteristics of the workplace, examining harmful substances, inspecting equipment, and enhancing worker methods. The shorter the work experience of health professionals, the more dependent they are on group health services. The variables affecting comprehensive satisfaction were the period of work, healthcare management satisfaction, and work environment management satisfaction. Most of the requirements of health professionals in the workplace were practical improvement case presentations, MSDSs, and legal document management.

Incidence of congenital hypothyroidism by gestational age: a retrospective observational study: Ha Young Jo, Eun Hye Yang, Young Mi Kim, Soo-Han Choi, Kyung Hee Park, Hye Won Yoo, Su Jeong Park, Min Jung Kwak; J Yeungnam Med Sci. 2023;40(1):30-36. Published online April 12, 2022; DOI: https://doi.org/10.12701/jyms.2022.00059; Funded: Pusan National University Hospital

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Abstract PDF

Background
Congenital hypothyroidism (CH) is the leading cause of preventable physical and intellectual disabilities. This study aimed to assess the incidence and clinical characteristics of CH in newborns.
Methods
We retrospectively reviewed the medical records of all newborns delivered at the Pusan National University Hospital between January 2011 and March 2021. The incidence of CH was compared according to gestational age, birth weight, and small for gestational age (SGA). The patients aged ≥3 years who could not maintain normal thyroid function and required levothyroxine treatment were diagnosed with permanent CH. Logistic regression analysis was performed to compare CH risks.
Results
Of 3,722 newborns, 40 were diagnosed with CH (1.07%). Gestational age and birth weight were significantly associated with CH incidence. The odds ratios (ORs) of CH in infants delivered at 32–37, 28–31, and <28 weeks were 2.568 (95% confidence interval [CI], 1.141–5.778), 5.917 (95% CI, 2.264–15.464), and 7.441 (95% CI, 2.617–21.159) times higher, respectively, than those delivered at term. The ORs of CH in infants weighing 1,500–2,499 g, 1,000–1,499 g, and <1,000 g were 4.664 (95% CI, 1.928–11.279), 11.076 (95% CI, 4.089–29.999), and 12.544 (95% CI, 4.350–36.176) times greater, respectively, than those in infants weighing ≥2,500 g. The OR of CH was 6.795 (95% CI, 3.553–13.692) times greater in SGA than in non-SGA infants.
Conclusion
The CH incidence in South Korea has increased significantly compared with that in the past. Gestational age, birth weight, and SGA were significantly associated with CH incidence.

Citations

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The prevalence of hypothyroxinemia in premature newborns
Renata Stawerska, Marzena Nowak-Bednarek, Tomasz Talar, Marzena Kolasa-Kicińska, Anna Łupińska, Maciej Hilczer, Ewa Gulczyńska, Andrzej Lewiński
Frontiers in Endocrinology.2022;[Epub] CrossRef

Review article

The use of animal models in rheumatoid arthritis research: Jin-Sun Kong, Gi Heon Jeong, Seung-Ah Yoo; J Yeungnam Med Sci. 2023;40(1):23-29. Published online November 22, 2022; DOI: https://doi.org/10.12701/jyms.2022.00773; Funded: National Research Foundation of Korea, Ministry of Education, Science and Technology

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Abstract PDF: The pathological hallmark of rheumatoid arthritis (RA) is a synovial pannus that comprises proliferating and invasive fibroblast-like synoviocytes, infiltrating inflammatory cells, and an associated neoangiogenic response. Animal models have been established to study these pathological features of human RA. Spontaneous and induced animal models of RA primarily reflect inflammatory aspects of the disease. Among various induced animal models, collagen-induced arthritis (CIA) and collagen antibody-induced arthritis (CAIA) models are widely used to study the pathogenesis of RA. Improved transplantation techniques for severe combined immunodeficiency (SCID) mouse models of RA can be used to evaluate the effectiveness of potential therapeutics in human tissues and cells. This review provides basic information on various animal models of RA, including CIA and CAIA. In addition, we describe a SCID mouse coimplantation model that can measure the long-distance migration of human RA synoviocytes and cartilage destruction induced by these cells.

Communication

The pros and cons of entry restrictions: are entry restrictions really effective in preventing the spread of SARS-CoV-2?: Donghwi Park, Mathieu Boudier-Revéret, Min Cheol Chang; J Yeungnam Med Sci. 2022;39(4):344-346. Published online January 14, 2022; DOI: https://doi.org/10.12701/yujm.2021.01599; Funded: National Research Foundation of Korea

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Abstract PDF: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has rapidly spread worldwide, leading the World Health Organization to declare coronavirus disease 2019 (COVID-19) a pandemic. To curb the unchecked spread of SARS-CoV-2 infection, most countries have enforced travel restrictions. However, it is debatable whether such restrictions are effective in containing infections and preventing pandemics. Rather, they may negatively impact economies and diplomatic relationships. Each government should conduct an extensive and appropriate analysis of its national economy, diplomatic status, and COVID-19 preparedness to decide whether it is best to restrict entering travelers. Even if travelers from other countries are allowed entry, extensive contact tracing is required to prevent the spread of COVID-19. In addition, governments can implement “travel bubbles,” which allow the quarantine-free flow of people among countries with relatively low levels of community transmission. An accurate evaluation of the benefits and losses due to entry restrictions during the COVID-19 pandemic would be helpful in determining whether entry restrictions are an effective measure to reduce the spread of infection in future pandemics.

Case report

Recovery of the ascending reticular activating system and consciousness following comprehensive management in a patient with traumatic brain injury: a case report: Sung Ho Jang, Young Hyeon Kwon; J Yeungnam Med Sci. 2022;39(4):332-335. Published online August 12, 2021; DOI: https://doi.org/10.12701/yujm.2021.01172; Funded: National Research Foundation of Korea, Ministry of Science, ICT and Future Planning

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Abstract PDF: We report on changes in the ascending reticular activating system (ARAS) concurrent with the recovery of impaired consciousness following rehabilitation and cranioplasty in a patient with traumatic brain injury (TBI), which were demonstrated on diffusion tensor tractography (DTT). A 34-year-old male patient was diagnosed with a traumatic intracerebral hemorrhage after falling from a height of approximately 7 m and underwent a right frontoparietotemporal decompressive craniectomy and hematoma removal. At 5 months after onset, when starting rehabilitation, the patient showed impaired consciousness, with a Glasgow Coma Scale (GCS) score of 4. Comprehensive rehabilitative therapy was provided until 14 months after onset, and his GCS score improved to 8. Cranioplasty was performed using auto-bone at 14 months after onset. One month after cranioplasty, his GCS score improved to 12. On the 15-month DTT, the deviated lower dorsal ARAS was restored on both sides, and the right side had become thicker. The right lower ventral ARAS was reconstructed, and increased neural connectivity of the upper ARAS was detected in both the prefrontal cortices. Thus, changes in the ARAS were demonstrated in a patient with TBI during recovery of consciousness following rehabilitation and cranioplasty.

Original articles

A study on the mental health of students at a medical school during COVID-19 outbreak: a retrospective study: Yu Ra Kim, Hye Jin Park, Bon-Hoon Koo, Ji Young Hwang, Young Hwan Lee; J Yeungnam Med Sci. 2022;39(4):314-321. Published online August 16, 2022; DOI: https://doi.org/10.12701/jyms.2022.00437; Funded: Yeungnam University Medical Center

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Abstract PDF: Background
In this study, the degree of anxiety, depression, and stress caused by coronavirus disease 2019 (COVID-19) was identified, as well as the need for psychological prevention measures among medical students in the Daegu region that was designated the first special disaster area due to the spread of COVID-19.
Methods
The subjects of this study were 318 medical students in Daegu who voluntarily participated in an online test using the Hospital Anxiety and Depression Scale and Impact of Event Scale-Revised Korean version. As a result of the test, risk students received immediate telephone counseling, and the effect of this telephone counseling was analyzed.
Results
There were no differences in depression, anxiety, or stress according to gender and grade. As a result of immediate telephone counseling for risk students, significant differences were found in depression, anxiety, and stress, and the counseling was found to be effective.
Conclusion
For medical students who are easily exposed to stress, the importance of psychological prevention measures and effectiveness of non-face-to-face counseling should be recognized. In the field of medical education, we must do our best to build a system that can be used immediately at the appropriate time for these programs.

Intensive care unit management of uncomplicated type B aortic dissection in relation to treatment period: a retrospective observational study: Chul Ho Lee, Jae Seok Jang, Jun Woo Cho; J Yeungnam Med Sci. 2022;39(4):294-299. Published online February 10, 2022; DOI: https://doi.org/10.12701/jyms.2021.01690; Funded: Catholic University of Daegu

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Abstract PDF: Background
Medical therapy is the standard treatment for uncomplicated acute type B aortic dissection (ATBAD), but there is little evidence of the need for intensive care unit (ICU) management. Therefore, we aimed to investigate the effects of ICU treatment on uncomplicated ATBAD.
Methods
We retrospectively studied patients with uncomplicated ATBAD who were medically treated between January 2010 and July 2020. Patients were divided into long-term ICU stay (LIS) and short-term ICU stay (SIS) groups, according to a 48-hour cutoff of ICU stay duration. The incidence of pneumonia and delirium, rate of aortic events, hospital mortality, and survival rate were compared.
Results
Fifty-five patients were treated for uncomplicated ATBAD (n=26 for LIS and n=29 for SIS). The incidence of pneumonia (7.7% vs. 3.6%) and delirium (34.6% vs. 14.3%) was higher in the LIS group than in the SIS group, but the differences were not statistically significant. The survival rates at 1, 3, and 5 years were not different between the two groups (LIS: 96.2%, 88.0%, and 54.2% vs. SIS: 96.4%, 92.2%, and 75.5%, respectively; p=0.102). Multivariate Cox regression analysis for aortic events showed that using a calcium channel blocker lowered the risk of aortic events.
Conclusion
Long-term ICU treatment is unlikely to be necessary for the treatment of uncomplicated ATBAD. Active use of antihypertensive agents, such as calcium channel blockers, may be needed during the follow-up period.

Review articles

Pediatric headache: a narrative review: Saeyoon Kim; J Yeungnam Med Sci. 2022;39(4):278-284. Published online September 14, 2022; DOI: https://doi.org/10.12701/jyms.2022.00528; Funded: National Research Foundation of Korea, Ministry of Education

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Abstract PDF

Headache is one of the most common neurological disorders in children and adults and can cause significant distress and disability in children and their families. The spectrum of pediatric headaches is broad, and the underlying etiology is variable. The symptoms and phenotypes of headaches in children may differ slightly from those in adults. It is important to have a good understanding of headaches in children and to distinguish between primary and secondary headaches through appropriate history assessment and neurological examination. Accurate diagnosis and appropriate drug selection are helpful for effective treatment. This article reviews headaches in children and adolescents, focusing on approaches for diagnosis and management.

Citations

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Multivariate prediction of long COVID headache in adolescents using gray matter structural MRI features
Minhoe Kim, Sunkyung Sim, Jaeseok Yang, Minchul Kim
Frontiers in Human Neuroscience.2023;[Epub] CrossRef

Optogenetic neuromodulation with gamma oscillation as a new strategy for Alzheimer disease: a narrative review: Haneol Ko, Sang-Pil Yoon; J Yeungnam Med Sci. 2022;39(4):269-277. Published online February 14, 2022; DOI: https://doi.org/10.12701/jyms.2021.01683; Funded: Jeju National University

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Abstract PDF

The amyloid hypothesis has been considered a major explanation of the pathogenesis of Alzheimer disease. However, failure of phase III clinical trials with anti-amyloid-beta monoclonal antibodies reveals the need for other therapeutic approaches to treat Alzheimer disease. Compared to its relatively short history, optogenetics has developed considerably. The expression of microbial opsins in cells using genetic engineering allows specific control of cell signals or molecules. The application of optogenetics to Alzheimer disease research or clinical approaches is increasing. When applied with gamma entrainment, optogenetic neuromodulation can improve Alzheimer disease symptoms. Although safety problems exist with optogenetics such as the use of viral vectors, this technique has great potential for use in Alzheimer disease. In this paper, we review the historical applications of optogenetic neuromodulation with gamma entrainment to investigate the mechanisms involved in Alzheimer disease and potential therapeutic strategies.

Citations

Citations to this article as recorded by

Exogenous AMPA downregulates gamma-frequency network oscillation in CA3 of rat hippocampal slices
Chengzhang Li, Zhenrong Li, Sihan Xu, Sanwei Jiang, Zhenli Ye, Bin Yu, Shixiang Gong, Junmei Li, Qilin Hu, Bingyan Feng, Mengmeng Wang, Chengbiao Lu
Scientific Reports.2023;[Epub] CrossRef
Light-Controlled Modulation and Analysis of Neuronal Functions
Carlo Matera, Piotr Bregestovski
International Journal of Molecular Sciences.2022; 23(21): 12921. CrossRef

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