1.The Effect of Lens Nucleus and Cortex Material on Lens Epithelial Cell Culture through In vitro Capsular Bag Model.
Jaehwan LEE ; Heeseung CHIN ; Junghyub OH
Journal of the Korean Ophthalmological Society 2001;42(4):630-637
PURPOSE: This study attempts to evaluate the effect of lens cortex and nucleus remnants on posterior capsular opacification with method of the cell culture according to in vitro capsular bag model. METHODS: After bovine lens were isolated, we performed continuous curvilinear capsulorhexis and hydrodissectioin of the lens fiber mass. At this stage a tension ring was implanted and then the preparations placed in organ culture for up to 6 weeks. Lens cortex and nucleus material was added at the culture media in group 2, 3, 4, 5, 6 with amount of 1/16, 1/32, 1/64, 1/96, 1/128 of one lens volume. Group 1 was control group that was not added lens materials. Cell coverage of the posterior lens capsule was recorded and the capsules were examined, both pre-and post-coverage, for proliferative activity. RESULTS: After a lag period outgrowth was observed across the posterior capsule. The proliferative activity was greater at the groups that were added more amount of the lens cortex and nucleus material. CONCLUSIONS: it is important that we should not remain any lens cortex material remnant at cataract surgery.
Capsules
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Capsulorhexis
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Cataract
;
Cell Culture Techniques
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Culture Media
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Epithelial Cells*
;
Organ Culture Techniques
2.Ultrasonographic evaluation of pennation angle in canine tibialis cranialis muscle in South Korea: an observational study
Jaehwan KIM ; Tae Sung HWANG ; Hee Chun LEE
Korean Journal of Veterinary Research 2024;64(2):e14-
In human, ultrasonography is used to measure the pennation angle in various muscles to identify muscle functions such as force production, and to study alterations of the pennation angle during muscle contraction, hypertrophy, and atrophy. However, assessments of the pennation angle have not yet been conducted in dogs. This study aims to assess the normal pennation angle of the tibialis cranialis muscle in dogs using ultrasound and to detect changes in this angle in dogs with muscular atrophy. Sixty-eight healthy dogs were examined to establish normal values, while 12 ataxic and 12 lame dogs with suspected hindlimb muscle atrophy were also included. The pennation angle was measured using ultrasound at the midpoint between the proximal end of the tibia and the malleolus, measuring the angle between the muscle bundle and the deep aponeurosis. To confirm the significance between the 5 breeds and to identify a difference between normal and atrophied muscles, statistical analysis was conducted. The study found no significant difference in pennation angle between breeds, with mean values (± standard deviation) of 4.97° (± 1.88) in neutral, 7.25° (± 2.68) in flexion, and 3.31° (± 1.33) in extension positions. Decrease of the pennation angle was identified in muscle atrophy and the flexion position was determined to be the most appropriate for pennation angle measurement of tibialis cranialis muscle. We recommend considering the pennation angle as a valuable indicator of muscle health in dogs, as it demonstrates significant potential for diagnosing and monitoring muscular conditions.
3.Illness Experiences and Palliative Care Needs in Community Dwelling Persons with Cardiometabolic Diseases
EunSeok CHA ; JaeHwan LEE ; KangWook LEE ; Yujin HWANG
Korean Journal of Hospice and Palliative Care 2019;22(1):8-18
PURPOSE: This study was conducted to better understand the illness experiences and palliative care needs in community-dwelling persons with cardiometabolic diseases. METHODS: This qualitative descriptive study was conducted with 11 patients (and three family members) among 28 patients contacted. Interviews were led by the principal investigator in her office or at participants' home depending on their preference. All interviews were digitally recorded and transcribed by a research assistant. The interviews were analyzed by two independent researchers using a conventional method. RESULTS: Participants' ages ranged from 42 to 82 years (nine men and two women). Three themes were identified: (1) same disease, but different illness experiences; (2) I am in charge of my disease(s); (3) preparation for disease progression. Participants were informed of the name of their disease when they were diagnosed, but not provided with explanation of the diagnosis or meant or how to do self-care to delay the disease progression, which increased the feelings of uncertainty, hopelessness and anxiety. Taking medication was considered to be the primary treatment option and self-care a supplemental one. Advanced care plans were considered when they felt the progression of their disease(s) while refraining from sharing it with their family or health care professionals to save their concerns. All participants were willing to withhold life-sustaining treatment without making any preparation in writing. CONCLUSION: Education on self-care and advanced care planning should be provided to community-dwelling persons with cardiometabolic diseases. A patient-centered education program needs to be developed for this population.
Anxiety
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Chronic Disease
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Delivery of Health Care
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Diagnosis
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Disease Progression
;
Education
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Humans
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Independent Living
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Male
;
Methods
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Palliative Care
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Qualitative Research
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Research Personnel
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Self Care
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Uncertainty
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Writing
4.Abducens Nerve Palsy Complicated by Inferior Petrosal Sinus Septic Thrombosis Due to Mastoiditis.
Jung Hyun JANG ; Jung Min PARK ; Jaehwan KWON ; Soo Jung LEE
Korean Journal of Ophthalmology 2012;26(1):65-68
We present a very rare case of a 29-month-old boy with acute onset right abducens nerve palsy complicated by inferior petrosal sinus septic thrombosis due to mastoiditis without petrous apicitis. Four months after mastoidectomy, the patient fully recovered from an esotropia of 30 prism diopters and an abduction limitation (-4) in his right eye.
Abducens Nerve Diseases/diagnosis/*etiology
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Child, Preschool
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Diagnosis, Differential
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Humans
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Male
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Mastoiditis/*complications/diagnosis/surgery
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Otitis Media/*complications/diagnosis
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Sinus Thrombosis, Intracranial/*complications/diagnosis
5.Contrast Echocardiography in two-dimensional left ventricular measurements: comparison with 256-row multi-detector computed tomography as a reference standard in Beagles
Jaehwan KIM ; Soyoung KIM ; Yeonhea LEE ; Hakyoung YOON ; Kidong EOM
Journal of Veterinary Science 2019;20(5):e45-
Unenhanced echocardiography (UE), commonly used in veterinary practice, is limited by left ventricular (LV) foreshortening and observer dependency. Contrast echocardiography (CE) was used to compare two-dimensional (2D) LV measurements made using UE and 256-row multi-detector computed tomography (MDCT) as a reference standard. Seven healthy beagle dogs were evaluated in this study. Measurements obtained using CE, including LV wall thickness, internal diameter, and longitudinal and transverse length, were significantly greater than those obtained using UE. Measurements of LV internal dimension in diastole (LVIDd) and systole (LVIDs) were significantly larger with CE compared UE. Regardless of the cardiac cycle, LV longitudinal (LVLd and LVLs) and transverse diameter (LVTDd and LVTDs) measurements were significantly different with CE and approximated values from MDCT. Among automatically calculated parameters, LV end-systolic volume and the relative wall thickness were significantly different between UE and CE. In CE, the correlation coefficients of 4 major parameters (r = 0.87 in LVIDd; 0.91 in LVIDs; 0.87 in LVLd; and 0.81 in LVLs) showed higher values compared to the UE (r = 0.68 in LVIDd, 0.71 in LVIDs, 0.69 in LVLd, and 0.35 in LVLs). Inter-observer agreement was highest for MDCT and higher for CE than UE. In conclusion, CE is more accurate and reproducible than UE in assessing 2D LV measurements and can overcome the limitations of UE including LV foreshortening and high observer dependency.
Animals
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Diastole
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Dogs
;
Echocardiography
;
Multidetector Computed Tomography
;
Systole
6.Oral Complications after Antineoplastic Treatment in Pediatric Patients
Yongjin LEE ; Jaehwan KIM ; Namki CHOI ; Seonmi KIM
Journal of Korean Academy of Pediatric Dentistry 2019;46(3):239-246
The purpose of this study was to examine dental complications and to evaluate the effects of initial treatment age, treatment modalities, and treatment duration on the disorder after radiation and chemotherapy in pediatric cancer patients.For 93 children with clinical and radiographic data, the number of teeth, the morphology of teeth, the shape of the roots, and development status of the dentition were evaluated.Dental development disorders were found in 61.3% of the children. The mostly found abnormality was root deformity with the prevalence of 31.2%. In children submitted to the therapy before the age of 6, the number of missing teeth (p = 0.029) and microdontia (p = 0.003) were greater compared to the children who started to receive the treatment after the age of 6. The combination of radiation and chemotherapy showed significantly greater incidences of missing teeth (p = 0.030), microdontia (p = 0.046), and root deformity (p = 0.009) when compared with the sole application of chemotherapy. When the children were submitted to anticancer therapy for 18 months or longer duration, greater number of missing teeth (p = 0.032), microdontia (p = 0.011), root deformity (p = 0.025), and total number of teeth affected (p = 0.036) were observed compared with duration less than 18 months.The number of dental abnormalities increased when the children were treated at earlier ages, with combination of radiation and chemotherapy, and for longer period of time.
Child
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Congenital Abnormalities
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Dentition
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Drug Therapy
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Humans
;
Incidence
;
Prevalence
;
Tooth
7.A Case of Frey's Syndrome Diagnosed and Followed Up Using the Quantitative Sudomotor Axon Reflex Test
Jaehwan KIM ; Minkyung KIM ; YeEun KIM ; Hye Lim LEE
Journal of Clinical Neurology 2019;15(4):585-587
No abstract available.
Axons
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Reflex
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Sweating, Gustatory
8.O-Arm Navigation-Guided Unilateral Biportal Endoscopic Decompression of Far-Out Syndrome
Rohit Akshay KAVISHWAR ; YiHao LIANG ; Dongeon LEE ; Jaehwan KIM ; Maria PEDRAZA ; Jin-Sung KIM
Neurospine 2024;21(4):1149-1153
The main aim of this video article is to demonstrate the combined use of O-arm navigation and unilateral biportal endoscopy (UBE) to manage far-out syndrome (FOS). In FOS there is entrapment and compression of the fifth lumbar nerve beyond the foramen and between L5 transverse process and the sacral ala at the lumbosacral junction. Conventional microscopic decompression using a paraspinal approach had been the gold standard for its management. However, the surgery is technically challenging due to the deep location of the pathology and intricate anatomy of extraforaminal space. There have been some published reports of unsatisfactory outcomes with microscopic decompression for FOS. We decided to integrate navigation with UBE to increase precision for the management of FOS. A 70-year-old female presented to us with chief complaint of left lower limb radiculopathy since 1 year. She also complained of numbness and paresthesias in her left leg and foot. She was unable to walk for more than 10 minutes due to pain. Her magnetic resonance imaging scan revealed compression of left L5 nerve root in the extraforaminal region. UBE decompression via paraspinal approach was performed for her under O-arm navigation. She experienced immediate relief of her symptoms in the postoperative period. O-arm-navigation-guided UBE is an effective and safer alternative to microsurgical decompression for the management of FOS. This video demonstrates the step-by-step implementation of O-arm navigation with endoscopy and its precise execution.
9.O-Arm Navigation-Guided Unilateral Biportal Endoscopic Decompression of Far-Out Syndrome
Rohit Akshay KAVISHWAR ; YiHao LIANG ; Dongeon LEE ; Jaehwan KIM ; Maria PEDRAZA ; Jin-Sung KIM
Neurospine 2024;21(4):1149-1153
The main aim of this video article is to demonstrate the combined use of O-arm navigation and unilateral biportal endoscopy (UBE) to manage far-out syndrome (FOS). In FOS there is entrapment and compression of the fifth lumbar nerve beyond the foramen and between L5 transverse process and the sacral ala at the lumbosacral junction. Conventional microscopic decompression using a paraspinal approach had been the gold standard for its management. However, the surgery is technically challenging due to the deep location of the pathology and intricate anatomy of extraforaminal space. There have been some published reports of unsatisfactory outcomes with microscopic decompression for FOS. We decided to integrate navigation with UBE to increase precision for the management of FOS. A 70-year-old female presented to us with chief complaint of left lower limb radiculopathy since 1 year. She also complained of numbness and paresthesias in her left leg and foot. She was unable to walk for more than 10 minutes due to pain. Her magnetic resonance imaging scan revealed compression of left L5 nerve root in the extraforaminal region. UBE decompression via paraspinal approach was performed for her under O-arm navigation. She experienced immediate relief of her symptoms in the postoperative period. O-arm-navigation-guided UBE is an effective and safer alternative to microsurgical decompression for the management of FOS. This video demonstrates the step-by-step implementation of O-arm navigation with endoscopy and its precise execution.
10.O-Arm Navigation-Guided Unilateral Biportal Endoscopic Decompression of Far-Out Syndrome
Rohit Akshay KAVISHWAR ; YiHao LIANG ; Dongeon LEE ; Jaehwan KIM ; Maria PEDRAZA ; Jin-Sung KIM
Neurospine 2024;21(4):1149-1153
The main aim of this video article is to demonstrate the combined use of O-arm navigation and unilateral biportal endoscopy (UBE) to manage far-out syndrome (FOS). In FOS there is entrapment and compression of the fifth lumbar nerve beyond the foramen and between L5 transverse process and the sacral ala at the lumbosacral junction. Conventional microscopic decompression using a paraspinal approach had been the gold standard for its management. However, the surgery is technically challenging due to the deep location of the pathology and intricate anatomy of extraforaminal space. There have been some published reports of unsatisfactory outcomes with microscopic decompression for FOS. We decided to integrate navigation with UBE to increase precision for the management of FOS. A 70-year-old female presented to us with chief complaint of left lower limb radiculopathy since 1 year. She also complained of numbness and paresthesias in her left leg and foot. She was unable to walk for more than 10 minutes due to pain. Her magnetic resonance imaging scan revealed compression of left L5 nerve root in the extraforaminal region. UBE decompression via paraspinal approach was performed for her under O-arm navigation. She experienced immediate relief of her symptoms in the postoperative period. O-arm-navigation-guided UBE is an effective and safer alternative to microsurgical decompression for the management of FOS. This video demonstrates the step-by-step implementation of O-arm navigation with endoscopy and its precise execution.