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Dive into the research topics where Joo Hyun Kim is active.

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Featured researches published by Joo Hyun Kim.


Ophthalmology | 2012

Oral alcohol administration disturbs tear film and ocular surface.

Joo Hyun Kim; Jung Ha Kim; Woo Ho Nam; Kayoung Yi; Dong Gyu Choi; Joon Young Hyon; Won Ryang Wee; Young Joo Shin

PURPOSEnTo investigate whether ethanol administration disturbs the tear film and ocular surface.nnnDESIGNnCase-control study.nnnPARTICIPANTSnTwenty healthy male subjects were recruited. Ethanol was administered to 10 subjects and another 10 subjects served as controls.nnnMETHODSnTwenty healthy male subjects with no ocular disease were recruited. Ethanol (0.75 g/kg) was administered orally at 8 pm for 2 hours to 10 subjects.nnnMAIN OUTCOME MEASURESnThe tear film and ocular surface were evaluated at 6 pm before drinking, at midnight, and immediately (6 am) and 2 hours (8 am) after waking the next morning. Tear osmolarity, ethanol concentration in tears and serum, Schirmers test results, tear film break-up time (TBUT), corneal punctuate erosion, and corneal sensitivity were measured.nnnRESULTSnEthanol was detected in tears and serum at midnight, but it was not detected the next morning. The mean tear osmolarity level increased in the alcohol group at midnight compared with that in the control group (P<0.001). The alcohol group showed a significantly shorter TBUT compared with the control group after drinking alcohol (P<0.001 at 12 am, P<0.001 at 6 am, and P = 0.002 at 8 am). There were significantly higher fluorescein staining scores in the alcohol group compared with those in the control group at 6 am and 8 am (P = 0.001 and P<0.001, respectively). No significant change was shown in corneal sensitivity or Schirmers test results in either group.nnnCONCLUSIONSnOrally administered ethanol was secreted into the tears. Ethanol in tears induced tear hyperosmolarity and shortened TBUT and triggered the development of ocular surface diseases. Similar changes could exacerbate signs and symptoms in patients with ocular surface disease.


Plastic and Reconstructive Surgery | 2014

Classification and surgical correction of asymmetric calves in Asians.

In Suck Suh; Min Su Jung; Byeong Ho Lee; Joo Hyun Kim; Kyoung Seok Tak; Duk Kyun Ahn

Background: In Asia, one of the most important factors in being physically attractive is to have aesthetically pleasing legs, which has made calf contouring surgery an issue nowadays. When one leg is abnormally changed because of various factors (e.g., iatrogenic causes, poliomyelitis, cerebral palsy, trauma, and tumor resection), the tissue atrophies. Such asymmetric calves can be corrected by various surgical methods. Methods: Calf asymmetry is defined as a difference in the maximal circumference greater than 2.0 cm between both calves. From 2005 to 2012, the authors carried out calf contouring operations on 68 patients. For patients with mild or moderate asymmetry, selective neurectomy with or without liposuction was performed on the hypertrophic calf according to shape and severity. For patients with severe asymmetry, selective neurectomy with liposuction was performed for the hypertrophic calf, whereas the hypotrophic calf was treated with fat injection or silicone implantation. Results: At a minimum of 3 months’ follow-up, the mild group patients had a size difference less than 0.5 cm. The moderate and severe asymmetry groups showed size differences less than 1.2 and 2.3 cm, respectively. No functional problems or major complications were shown. Minor complications included five cases of wound dehiscence, three cases of hematoma, and six cases of hypertrophic scar at the incision site. Conclusion: Classifying patients into three groups according to the maximal circumferential difference between both legs and treating them separately using different surgical methods could significantly provide satisfying outcomes in both functional and aesthetic aspects. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, IV.


Aesthetic Plastic Surgery | 2016

Early Intervention with Highly Condensed Adipose-Derived Stem Cells for Complicated Wounds Following Filler Injections.

Joo Hyun Kim; Seong Hoon Park; Byeong Ho Lee; Hii Sun Jeong; Hyun Jin Yang; In Suck Suh

BackgroundA rise in cosmetic procedures has seen the use of fillers become more prevalent. Complications resulting from use of fillers have prompted introduction of various medical and surgical interventions. Recently, stem cell therapies have become more widely used as a new treatment option for tissue repair and regeneration.MethodsWe utilized adipose-derived stem cells (ASCs) for tissue regeneration in patients with filler-related complications such as necrosis. All 12 patients were treated with ASCs and some patients had additional treatment. After relief of symptoms, wound surface area was compared in terms of pixel numbers and scar condition was evaluated using the Vancouver Scar Scale (VSS).ResultsIn general, we achieved satisfactory resolution of filler-related complications in a short period of time without serious side effects. The average number of days from stem cell treatment to symptom relief was 7.3xa0days. The proportion of wound surface area from photographic record was 4.39xa0% before treatment, decreasing considerably to 1.01xa0% following treatment. Last, the VSS showed almost all patients scored below 3, with two patients receiving scores of 7 and 8; the average score was 2.78 (range from 0 to 8).ConclusionsASCs are a new treatment option for post-filler injection wounds such as necrosis. Using stem cells, we were able to obtain satisfactory results in a short period of time without complications requiring surgical procedures. We suggest stem cell injections could be used as the first option for treatment of complications from filler injections.Level of Evidence VThis journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266.


British Journal of Ophthalmology | 2013

Contralateral lateral rectus recession versus recess–resect for recurrent exotropia after unilateral recess–resect

Joo Hyun Kim; Hae Jin Kim; Dong Gyu Choi

Background To compare outcomes following contralateral lateral rectus (LR) recession and recess–resect (RR) procedures for recurrent exotropia of 20–25 prism dioptres (PD) after unilateral RR. Methods 39 subjects were included in this retrospective study. All underwent, as a primary surgery for intermittent exotropia, unilateral RR on the non-dominant eye. They were assigned to the subsequent contralateral LR recession (LR, n=19) or RR (n=20) group for recurrent exotropia of 20–25 PD. Surgical success was defined as alignment between 5 PD esodeviation and 10 PD exodeviation. Results The mean follow-up duration after the reoperation was 32.3±26.4 months in the LR group and 30.5±26.8 in the RR group (p=0.945). The mean deviation angles at postoperative 1u2005day were −0.7 PD (overcorrection) in the LR group and −4.3 PD in the RR group (p=0.047). The deviation angles at 3 and 6u2005months postoperatively were not significant (p=0.771, p=0.923). The final successful outcome was achieved in 63.2% of patients in the LR group and in 65% of patients in the RR group (p=0.905). Conclusions Contralateral LR recession was found to be a safe and effective procedure for the treatment of recurrent exotropia of 20–25 PD after unilateral RR for intermittent exotropia. With LR recession, the intentional overcorrection in the immediate postoperative period could be avoided.


Investigative Ophthalmology & Visual Science | 2016

Assessment of Transepidermal Water Loss From the Ocular Area in Dry Eye Disease

Hyun Sun Jeon; Sang Woong Youn; Hee Eun Jeon; Joo Hyun Kim; Joon Young Hyon

PurposenTo investigate transepidermal water loss (TEWL) from the ocular area in dry eye disease (DED) and evaluate the correlation between ocular TEWL and other DED parameters.nnnMethodsnTransepidermal water loss from the ocular area in 56 eyes with DED and 38 healthy eyes was measured using a Tewameter TM300 that was equipped with custom made goggles (measuring temperature 24°C-26°C and relative humidity 35%-45%). The DED group was classified into two subgroups, aqueous deficient dry eye (ADDE) and evaporative dry eye (EDE). Correlations between ocular TEWL and other DED parameters, such as tear osmolarity, tear break-up time (TBUT), corneal staining, conjunctival staining, Schirmer I test, Ocular Surface Disease Index (OSDI), and Visual Analogue Scale score were evaluated.nnnResultsnOcular TEWL was significantly higher in the DED group (63.0 ± 12.2 g/h/m2) than in the control group (54.7 ± 14.2 g/h/m2; P = 0.003). Although there was no significant difference, TEWL was higher in the ADDE subgroup (64.0 ± 10.7 g/h/m2) compared with the EDE subgroup (61.1 ± 14.9 g/h/m2). Tear break-up time, corneal staining score, and OSDI were significantly correlated with ocular TEWL (P < 0.05) in all participants. Ocular TEWL loss was negatively correlated with Schirmer I test value in the DED group.nnnConclusionsnOcular TEWL was significantly higher in DED patients compared with controls, reflecting higher tear evaporation in DED patients. Patients who have shorter Schirmer I test values tend to have higher TEWL values. Not only EDE but also ADDE patients may have increased tear evaporation.


Journal of Craniofacial Surgery | 2014

Combination of absorbable mesh and demineralized bone matrix in orbital wall fracture for preventing herniation of orbit.

Kyoung Seok Tak; Min Su Jung; Byeong Ho Lee; Joo Hyun Kim; Duk Kyun Ahn; Hii Sun Jeong; Young Kyu Park; In Suck Suh

Abstract After restoration of orbit wall fracture, preventing sequelae is important. An absorbable mesh is commonly used in orbit wall fracture, yet it has limitation due to orbit sagging when bony defect is larger than the moderate size (1 × 1 cm2). In this study, the authors present a satisfactory result in treating orbit wall fracture larger than the moderate size with a combination of absorbable mesh and demineralized bone matrix. From 2009 to 2012, 63 patients with bony defect larger than the moderate size, who were treated with a combination of absorbable mesh and demineralized bone matrix, were reviewed retrospectively. The site of bony defect, size, and applied amount of demineralized bone matrix were reviewed, and a 2-year follow-up was done. Facial computed tomography scans were checked preoperative, immediate postoperative, and 2-year postoperative. Among the 63 patients, there were 52 men and 11 women. Mean age was 33.3 years. The most common cause was blunt blow (35 cases); mean defect size was 13.36 × 12.82 mm2 in inferior wall fracture and 20.69 × 14.41 mm2 in medial wall fracture. There was no complication except for 3 cases of infraorbital nerve hypoesthesia. A 2-year follow-up computed tomography showed that the surgical site preserved bony formation without herniation. In treating moderate-sized bony defect in orbit wall fracture, absorbable mesh and demineralized bone matrix can maintain structural stability through good bony formation even after degradation of absorbable mesh.


Psychiatry and Clinical Neurosciences | 2017

Re-adjusting the cut-off score of the Korean version of the Childhood Autism Rating Scale for high-functioning individuals with autism spectrum disorder

Hyuk‐Jin Kwon; Hee‐Jeong Yoo; Joo Hyun Kim; Dong‐Hyun Noh; Hyun‐Jung Sunwoo; Ye Seul Jeon; Sang‐youn Lee; Ye‐ul Jo; Gui‐Young Bong

The current cut‐off score of the Korean version of the Childhood Autism Rating Scale (K‐CARS) does not seem to be sensitive enough to precisely diagnose high‐functioning autism. The aim of this study was to identify the optimal cut‐off score of K‐CARS for diagnosing high‐functioning individuals with autism spectrum disorders (ASD).


Aesthetic Plastic Surgery | 2017

Effectiveness of Hip External Rotator Strengthening Exercise in Korean Postural Bowleg Women

Seong Hoon Park; Jun Won Lee; Joo Hyun Kim; Kyoung Seok Tak; Byeong Ho Lee; In Suck Suh

Postural bowleg is a subclinical entity with both aesthetic and functional outcomes and appears to be common in East Asian countries. Internal rotation of the hip joint is associated with varus alignment at the knee joint of the bowleg. Strengthening exercise for the hip external rotator muscles seems to be effective in improving varus alignment of bowleg, but no standardized exercise program exists. A standardized active resistance strengthening exercise for hip external rotator muscles could improve varus alignment of the lower limb in bowlegged Korean women. In this article, a case series study was conducted to observe changes following a standardized 3-month program using equipment designed for strengthening of the hip external rotator muscles. Photogrammetric and radiographic data were used to compare the gap between knees and tibiofemoral (TF) angles before and after the exercise program. As a result, on average, the knee gap decreased by 1.6xa0cm. The TF angle decreased by 1.5°. Regression analysis revealed a statistically significant association between changes in knee gap and TF angle. The standardized 3-month active resistance strengthening exercise program of hip external rotator muscles was effective in improving postural deviation and cosmetic outcomes in bowlegged Korean women.Level of Evidence IVThis journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266.


Journal of Craniofacial Surgery | 2016

Osteonevus of Nanta Presenting as Flesh-Colored Papule of Cheek Following Laser Ablation.

Seong Hoon Park; Joo Hyun Kim; Byeong Ho Lee; In Suck Suh; Jeong Won Kim; Hii Sun Jeong

AbstractOsteonevus of Nanta is a melanocytic nevus displaying secondary ossification and carrying a potential for malignancy. A solitary occurrence is reported herein, presenting as a flesh-colored papule following laser ablation.A 56-year-old woman sought treatment for a minor papular growth of the cheek. This lesion had developed at the site of prior CO2 laser ablation done elsewhere to eradicate a pigmented nevus. The patients medical records and histopathology report were obtained after surgical excision.Histologically, a completely excised osteonevus of Nanta was evident, marked by an intradermal nevus with subjacent osseous metaplasia. Clinical presentations of these lesions may vary, but the potential for malignancy remains.


Journal of Craniofacial Surgery | 2015

Reconstruction With Modified Face Lift and Orbicularis Oculi V-Y Advancement Flap for Sebaceous Carcinoma on Temple Area.

Byeong Ho Lee; Joo Hyun Kim; Seong Hoon Park; Duk Kyun Ahn; In Suck Suh; Hii Sun Jeong

Extraocular sebaceous carcinoma that occurs on sebaceous gland is a rare malignant cancer with unknown causes and nonspecific clinical characters, but with distinct pathology and immunohistochemical finding. In Kangnam Sacred Heart Hospital, there was a case that the result of preoperative punch biopsy was squamous cell carcinoma and malignant proliferating trichilemmal tumor, but that of postoperative permanent biopsy was sebaceous carcinoma. The type of tumor, differentiation, location, and aesthetic results are considered to get both recurrence-safe and aesthetically pleasing result. Various flaps were considered, and modified face-lift flap, forehead rotation flap, orbicularis oculi V-Y advancement flap were planned. There were no sign of recurrence of cancer or functional and aesthetical deformities 6 months after the surgery.

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Won Ryang Wee

Seoul National University

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Hyun Sun Jeon

Seoul National University Bundang Hospital

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Joon-Young Hyon

Seoul National University

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Joon Young Hyon

Seoul National University Bundang Hospital

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