1.Comparative pharmacokinetic and bioequivalence of nine oral ivermectin formulations in dogs
Suyoung KIM ; Syed Al Jawad SAYEM ; HyunYoung CHAE ; Sung-Won PARK ; Ling GUI ; Seung-Chun PARK ; JeongWoo KANG
Journal of Veterinary Science 2025;26(6):e88-
Objective:
This study evaluated the pharmacokinetics and bioequivalence of eight oral IVM formulations (B–I) compared with the innovator product (A) in dogs.
Methods:
Forty-five healthy dogs (mean body weight: 14.3 kg) were divided into nine groups (n = 5). Each received 6.2 µg/kg of IVM orally. Blood samples were collected up to 72 h post-dosing, and plasma IVM concentrations were quantified by liquid chromatography– mass spectrometry. Pharmacokinetic parameters were analyzed using a one-compartment model. Bioequivalence was assessed non-compartmentally using 90% confidence intervals for maximum concentration (Cmax ) and area under the plasma concentration–time curve (AUC72h ), with acceptance limits of 80–125%.
Results:
Absorption (Ka = 0.09–0.16 h −1 ), elimination half-life (T1/2 = 4.89–14.97 h), and systemic exposure (Cmax = 6.07–7.59 ng/mL) varied among formulations. Formulation C showed prolonged elimination (14.97 h) and higher exposure (AUC72h = 214.16 ng·h/ mL), whereas formulation H exhibited faster absorption but lower exposure (AUC72h = 114.36 ng·h/mL). Simulated dosing indicated that most formulations maintained plasma levels above the minimum effective concentration (0.2 ng/mL), except formulation E. Only formulation G met full bioequivalence with the reference product.
Conclusions
and Relevance: All formulations achieved plasma concentrations sufficient for prophylaxis, but only B, C, and G satisfied bioequivalence criteria. Larger sample sizes and standardized evaluation guidelines are recommended for multi-formulation bioequivalence studies.
3.A Familial Case Presented with Various Clinical Manifestations Caused by OPA1 Mutation
Jun Ho LEE ; Jaeho KANG ; Yeoung deok SEO ; Jeong Ik EUN ; Hyunyoung HWANG ; Sungyeong RYU ; Junseok JANG ; Jinse PARK
Journal of the Korean Neurological Association 2023;41(1):60-63
Ataxia is presented by various etiologies, including acquired, genetic and degenerative disorders. Although hereditary ataxia is suspected when typical symptom of ataxia with concurrent is identified, it is sometimes difficult to diagnose hereditary ataxia without genetic test. Clinically, next generation sequencing technology has been developed and widely used for diagnosis of hereditary disease. Hereby, we experienced cases of genetically confirmed OPA1 mutation, which are presented with various clinical manifestations including ataxic gait and decreased visual acuity.
5.Hypertrophic pyloric gastropathy with Helicobacter spp. in a dog
Hyunyoung JANG ; Seoung-Woo LEE ; Min JANG ; Sungho YUN ; Young-Sam KWON ; Jin-Kyu PARK ; Kija LEE
Korean Journal of Veterinary Research 2021;61(1):e3-
A 12-year-old, castrated male, mixed dog presented with a history of gradual abdominal distention for a year and anorexia recently, with abdominal radiographs showing a gastric pylorus distention. A solitary, pedunculated, heterogeneous mass arising from the mucosal layer in the pylorus with intact wall layers was identified during ultrasound and computed tomography. The gastric muscular layer was evenly thick. After surgical excision of the mass, histological examination confirmed hypertrophic pyloric gastropathy with polypoid growth and Helicobacter spp. infiltrating the gastric mucosal epithelium. This is the first reported diagnostic imaging case of hypertrophic pyloric gastropathy with Helicobacter spp. in a dog.
6.Hypertrophic pyloric gastropathy with Helicobacter spp. in a dog
Hyunyoung JANG ; Seoung-Woo LEE ; Min JANG ; Sungho YUN ; Young-Sam KWON ; Jin-Kyu PARK ; Kija LEE
Korean Journal of Veterinary Research 2021;61(1):e3-
A 12-year-old, castrated male, mixed dog presented with a history of gradual abdominal distention for a year and anorexia recently, with abdominal radiographs showing a gastric pylorus distention. A solitary, pedunculated, heterogeneous mass arising from the mucosal layer in the pylorus with intact wall layers was identified during ultrasound and computed tomography. The gastric muscular layer was evenly thick. After surgical excision of the mass, histological examination confirmed hypertrophic pyloric gastropathy with polypoid growth and Helicobacter spp. infiltrating the gastric mucosal epithelium. This is the first reported diagnostic imaging case of hypertrophic pyloric gastropathy with Helicobacter spp. in a dog.
8.Usefulness of the Berlin, STOP, and STOP-Bang Questionnaires in the Diagnosis of Obstructive Sleep Apnea
Journal of Sleep Medicine 2019;16(1):11-20
Obstructive sleep apnea (OSA) is a chronic sleep-related breathing disorder that requires long-term management. If OSA remains untreated, it can result in serious health consequences, including increased risk of both cardiovascular and cerebrovascular diseases. Polysomnography is considered to be the gold standard for diagnosing OSA; however, it is relatively expensive, time-consuming and technically complex. Thus, there is a growing interest in the use of simple and efficient screening tools for OSA. Although screening questionnaires such as the Berlin Questionnaire, the STOP Questionnaire, and the STOP-Bang Questionnaire are widely used to assess the presence of OSA, the findings regarding their diagnostic accuracy are not consistent. This review provides a descriptive summary of the scientific studies evaluating the accuracy of diagnostic tests for OSA.
Berlin
;
Cerebrovascular Disorders
;
Diagnosis
;
Diagnostic Tests, Routine
;
Mass Screening
;
Polysomnography
;
Respiration
;
Sensitivity and Specificity
;
Sleep Apnea Syndromes
;
Sleep Apnea, Obstructive
;
Surveys and Questionnaires
9.Factors related to Self-leadership of Korean Clinical Nurses: A Systematic Review and Meta-analysis
Kyoung Hee YU ; Hyunyoung PARK ; Keum Seong JANG
Journal of Korean Academy of Nursing Administration 2018;24(5):410-422
PURPOSE: In this study a systematic review and meta-analysis was used to examine the variables related to self-leadership in Korean clinical nurses. METHODS: A search and screening of the literature uncovered, 49 related studies done between 2003 and 2016 were then reviewed. A meta-analysis of 44 studies from doctoral dissertations, master's thesis and published articles was also carried out. The correlational effect size (ESr) for each related variable was calculated. RESULTS: Sixty-nine related variables were identified from the systematic review. Twenty-three (5 personal, 13 professional and 5 organizational) variables were eligible for meta-analysis. The overall effect size was .47. The personal factors (ESr=.48) and the professional factors (ESr=.44) had larger effect size than the organizational factors (ESr=.28). Factors with the largest effect size among personal, professional and organizational factors were self-efficacy (ESr=.58), nursing service (ESr=.68) and supervisor's leadership (ESr=.36) respectively. CONCLUSION: The results of this study show that for Korean clinical nurses individual factors including personal or professional factors have a stronger impact on self-leadership than organizational factors. It is necessary to develop interventions and training programs which focus on improving self-efficacy to promote self-leadership in clinical nurses.
Education
;
Humans
;
Leadership
;
Mass Screening
;
Nursing Services
10.Metronidazole Induced Encephalopathy with Irreversible Course
Journal of the Korean Neurological Association 2018;36(2):136-137
No abstract available.
Brain Diseases
;
Metronidazole

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