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1.  Fires and Burns Occurring in an Electrocautery after Skin Preparation with Alcohol during a Neurosurgery 
While there are reports regarding burns occurring to patients during the surgery, there are little reports concerning the incidents of the burns related to neurosurgical operations. Moreover, in Korea, even surveys and statistics on the incidents of burns in operating rooms are not known. This report explores burns occurring to a patient in an electrocautery scenario after disinfecting the surgical site with alcohol during the preparation of a neurosurgical operation in an operating room where there is much exposure to oxygen. The authors show a case of a 33-year-old male patient who undergoing evacuation of hematoma on occipital lesion, suffered second degree burns as a result of surgical fires.
doi:10.3340/jkns.2014.55.4.230
PMCID: PMC4094752  PMID: 25024831
Burns; Alcohol; Electrocautery; Neurosurgery
2.  Association between respiratory viruses and asthma exacerbations 
Korean Journal of Pediatrics  2014;57(1):26-28.
doi:10.3345/kjp.2014.57.1.26
PMCID: PMC3935109  PMID: 24578713
3.  A Comparison of the Clinical Outcomes of Decompression Alone and Fusion in Elderly Patients with Two-Level or More Lumbar Spinal Stenosis 
Objective
We compared the results of two surgical techniques by retrospective study of 60 elderly patients (65 years or older) who underwent either decompression alone or fusion for the treatment of two-level or more lumbar spinal stenosis.
Methods
During the period of 2003 and 2008, two-level or more decompression alone or fusion was performed for lumbar spinal stenosis by three surgeons at our institution. Patients were allocated to two groups by surgical modality, namely, to a decompression group (31 patients) or a fusion group (29 patients). Overall mean age was 71.1 years (range, 65-84) and mean follow-up was 5.5 years (range, 3-9). A retrospective review of clinical, radiological, and surgical data was conducted.
Results
No significant difference between the two groups was found with respect to age, follow-up period, surgical levels, or preoperative condition. At the last follow-up, correction of lumbar lordotic angle (determined radiologically) was better in the fusion group. However, clinical outcomes including visual analogue scale, Oswestry Disability Index, and the Odom's criteria were not significantly different in the two groups. On the other hand, surgical outcomes, such as, operation time, estimated blood loss, and surgical complications were significantly better in the decompression alone group.
Conclusion
Our findings suggest that decompressive laminectomy alone achieves good outcomes in patients with two-level or more lumbar spinal stenosis, associated with an advanced age, poor general condition, or osteoporosis.
doi:10.3340/jkns.2013.53.1.19
PMCID: PMC3579077  PMID: 23440621
Laminectomy; Spinal fusion; Spinal stenosis
4.  Functional Expression of TRPV4 Cation Channels in Human Mast Cell Line (HMC-1) 
Mast cells are activated by specific allergens and also by various nonspecific stimuli, which might induce physical urticaria. This study investigated the functional expression of temperature sensitive transient receptor potential vanilloid (TRPV) subfamily in the human mast cell line (HMC-1) using whole-cell patch clamp techniques. The temperature of perfusate was raised from room temperature (RT, 23~25℃ to a moderately high temperature (MHT, 37~39℃ to activate TRPV3/4, a high temperature (HT, 44~46℃ to activate TRPV1, or a very high temperature (VHT, 53~55℃ to activate TRPV2. The membrane conductance of HMC-1 was increased by MHT and HT in about 50% (21 of 40) of the tested cells, and the I/V curves showed weak outward rectification. VHT-induced current was 10-fold larger than those induced by MHT and HT. The application of the TRPV4 activator 4α-phorbol 12,13-didecanoate (4αPDD, 1µM) induced weakly outward rectifying currents similar to those induced by MHT. However, the TRPV3 agonist camphor or TRPV1 agonist capsaicin had no effect. RT-PCR analysis of HMC-1 demonstrated the expression of TRPV4 as well as potent expression of TRPV2. The [Ca2+]c of HMC-1 cells was also increased by MHT or by 4αPDD. In summary, our present study indicates that HMC-1 cells express Ca2+-permeable TRPV4 channels in addition to the previously reported expression of TRPV2 with a higher threshold of activating temperature.
doi:10.4196/kjpp.2010.14.6.419
PMCID: PMC3034123  PMID: 21311684
Mast cell; TRPV cation channels; TRPV4 protein; Temperature; Non-selective cation channel; Human
5.  Additive Effect between IL-13 Polymorphism and Cesarean Section Delivery/Prenatal Antibiotics Use on Atopic Dermatitis: A Birth Cohort Study (COCOA) 
PLoS ONE  2014;9(5):e96603.
Background
Although cesarean delivery and prenatal exposure to antibiotics are likely to affect the gut microbiome in infancy, their effect on the development of atopic dermatitis (AD) in infancy is unclear. The influence of individual genotypes on these relationships is also unclear. To evaluate with a prospective birth cohort study whether cesarean section, prenatal exposure to antibiotics, and susceptible genotypes act additively to promote the development of AD in infancy.
Methods
The Cohort for Childhood of Asthma and Allergic Diseases (COCOA) was selected from the general Korean population. A pediatric allergist assessed 412 infants for the presence of AD at 1 year of age. Their cord blood DNA was subjected to interleukin (IL)-13 (rs20541) and cluster-of-differentiation (CD)14 (rs2569190) genotype analysis.
Results
The combination of cesarean delivery and prenatal exposure to antibiotics associated significantly and positively with AD (adjusted odds ratio, 5.70; 95% CI, 1.19–27.3). The association between cesarean delivery and AD was significantly modified by parental history of allergic diseases or risk-associated IL-13 (rs20541) and CD14 (rs2569190) genotypes. There was a trend of interaction between IL-13 (rs20541) and delivery mode with respect to the subsequent risk of AD. (P for interaction = 0.039) Infants who were exposed prenatally to antibiotics and were born by cesarean delivery had a lower total microbiota diversity in stool samples at 6 months of age than the control group. As the number of these risk factors increased, the AD risk rose (trend p<0.05).
Conclusion
Cesarean delivery and prenatal antibiotic exposure may affect the gut microbiota, which may in turn influence the risk of AD in infants. These relationships may be shaped by the genetic predisposition.
doi:10.1371/journal.pone.0096603
PMCID: PMC4029558  PMID: 24848505
6.  Reference Values and Determinants of Fractional Concentration of Exhaled Nitric Oxide in Healthy Children 
Purpose
Measurement of the fractional concentration of exhaled nitric oxide (FeNO) is a quantitative, noninvasive, simple, safe method of assessing airway inflammation. While FeNO measurement has been standardized, reference values for elementary school children are scarce. The aim of this study was to establish reference values for FeNO in children.
Methods
FeNO was measured in elementary school children at 6-12 years of age in Seoul, Korea, following American Thoracic Society guidelines and using a chemiluminescence analyzer (NIOX Exhaled Nitric Oxide Monitoring System, Aerocrine, Sweden). A total of 1,252 children completed a modified International Study of Asthma and Allergy in Children (ISAAC) questionnaire; FeNO was measured in 1,063 children according to the protocol and in 808 children defined as healthy controls.
Results
Mean FeNO were 10.32 ppb, 16.58 ppb, and 12.36 ppb in non-atopic, atopic, and all 808 healthy controls, respectively. FeNO was not associated with age and gender. The FeNO reference equations were determined by multiple linear regression analysis, taking into account the variables of age, height, weight, total IgE, eosinophil percent, and bronchial hyper-responsiveness (methacholine PC20). FeNO=0.776+0.003×total IgE+0.340×eosinophil percent; coefficient of determination (R2)=0.084 in the 501 healthy non-atopic controls. FeNO=-18.365+1.536×eosinophil percent, R2=0.183 in the 307 healthy atopic controls; and FeNO=-7.888+0.130×Height+0.004×total IgE+1.233×eosinophil percent, R2=0.209 in the 808 all healthy controls. Eosinophil percent was correlated with FeNO in all healthy controls. FeNO was not associated with BMI.
Conclusion
This study provides reference values for FeNO that can be used to evaluate airway inflammation in elementary school children. Determinants that could most accurately predict FeNO in healthy school-age children were assessed.
doi:10.4168/aair.2014.6.2.169
PMCID: PMC3936047  PMID: 24587955
FeNO; reference value; determinants; healthy; children
7.  Secretome Analysis of Human Oligodendrocytes Derived from Neural Stem Cells 
PLoS ONE  2014;9(1):e84292.
In this study, we investigated the secretome of human oligodendrocytes (F3.Olig2 cells) generated from human neural stem cells by transduction with the gene encoding the Olig2 transcription factor. Using mRNA sequencing and protein cytokine arrays, we identified a number of biologically important secretory proteins whose expression has not been previously reported in oligodendrocytes. We found that F3.Olig2 cells secrete IL-6, PDGF-AA, GRO, GM-CSF, and M-CSF, and showed prominent expression of their corresponding receptors. Co-expression of ligands and receptors suggests that autocrine signaling loops may play important roles in both differentiation and maintenance of oligodendrocytes. We also found that F3.Olig2 cells secrete matrix metalloproteinases and matrix metalloproteinase-associated proteins associated with functional competence of oligodendrocytes. The results of our secretome analysis provide insights into the functional and molecular details of human oligodendrocytes. To the best of our knowledge, this is the first systematic analysis of the secretome of oligodendrocytes.
doi:10.1371/journal.pone.0084292
PMCID: PMC3879300  PMID: 24392122
8.  An Analytical Study of Mammalian Bite Wounds Requiring Inpatient Management 
Archives of Plastic Surgery  2013;40(6):705-710.
Background
Mammalian bite injuries create a public health problem because of their frequency, potential severity, and increasing number. Some researchers have performed fragmentary analyses of bite wounds caused by certain mammalian species. However, little practical information is available concerning serious mammalian bite wounds that require hospitalization and intensive wound management. Therefore, the purpose of this study was to perform a general review of serious mammalian bite wounds.
Methods
We performed a retrospective review of the medical charts of 68 patients who were referred to our plastic surgery department for the treatment of bite wounds between January 2003 and October 2012. The cases were analyzed according to the species, patient demographics, environmental factors, injury characteristics, and clinical course.
Results
Among the 68 cases of mammalian bite injury, 58 (85%) were caused by dogs, 8 by humans, and 2 by cats. Most of those bitten by a human and both of those bitten by cats were male. Only one-third of all the patients were children or adolescents. The most frequent site of injury was the face, with 40 cases, followed by the hand, with 16 cases. Of the 68 patients, 7 were treated with secondary intention healing. Sixty-one patients underwent delayed procedures, including delayed direct closure, skin graft, composite graft, and local flap.
Conclusions
Based on overall findings from our review of the 68 cases of mammalian bites, we suggest practical guidelines for the management of mammalian bite injuries, which could be useful in the treatment of serious mammalian bite wounds.
doi:10.5999/aps.2013.40.6.705
PMCID: PMC3840176  PMID: 24286042
Bites and stings; Wounds and injuries; Antibiotic prophylaxis; Plastics
9.  Two-Year Follow-up on the Use of Absorbable Mesh Plates in the Treatment of Medial Orbital Wall Fractures 
Archives of Plastic Surgery  2013;40(6):728-734.
Background
Absorbable materials offer many advantages in the reconstruction of orbital walls; however, the possibility of postoperative enophthalmos after complete absorption cannot be excluded. We evaluated the postoperative results of absorbable mesh plates used as onlay implanting on the medial orbital wall to determine whether they are suitable for medial orbital wall reconstruction.
Methods
The study included 20 patients with medial orbital wall fractures who were followed up for more than 2 years postoperatively. We used absorbable mesh plates in all of the patients. We measured the following: the changes in the expanded orbital volume by comparing the preoperative and postoperative computed tomography (CT) scans and the degree of clinical enophthalmos.
Results
There were no major complications associated with the use of absorbable materials such as infection, migration, or extrusion of mesh plates during the long-term follow-up. The orbital volumetric changes between the preoperative and postoperative CT scans were not statistically significant. However, the expanded orbital volume was not related to the degree of clinical enophthalmos.
Conclusions
The reconstructed orbital wall may provide supportive scar tissue to the orbital contents even after the absorbable materials have dissolved completely. Absorbable mesh plates could be another option for the reconstruction of the medial orbital wall.
doi:10.5999/aps.2013.40.6.728
PMCID: PMC3840180  PMID: 24286046
Absorbable implants; Orbital fractures; Follow-up studies
10.  Association between cord blood 25-hydroxyvitamin D concentrations and respiratory tract infections in the first 6 months of age in a Korean population: a birth cohort study (COCOA) 
Korean Journal of Pediatrics  2013;56(10):439-445.
Purpose
Previous studies suggest that the concentration of 25-hydroxyvitamin D [25(OH)D] in cord blood may show an inverse association with respiratory tract infections (RTI) during childhood. The aim of the present study was to examine the influence of 25(OH)D concentrations in cord blood on infant RTI in a Korean birth cohort.
Methods
The levels of 25(OH)D in cord blood obtained from 525 Korean newborns in the prospective COhort for Childhood Origin of Asthma and allergic diseases were examined. The primary outcome variable of interest was the prevalence of RTI at 6-month follow-up, as diagnosed by pediatricians and pediatric allergy and pulmonology specialists. RTI included acute nasopharyngitis, rhinosinusitis, otitis media, croup, tracheobronchitis, bronchiolitis, and pneumonia.
Results
The median concentration of 25(OH)D in cord blood was 32.0 nmol/L (interquartile range, 21.4 to 53.2). One hundred and eighty neonates (34.3%) showed 25(OH)D concentrations less than 25.0 nmol/L, 292 (55.6%) showed 25(OH)D concentrations of 25.0-74.9 nmol/L, and 53 (10.1%) showed concentrations of ≥75.0 nmol/L. Adjusting for the season of birth, multivitamin intake during pregnancy, and exposure to passive smoking during pregnancy, 25(OH)D concentrations showed an inverse association with the risk of acquiring acute nasopharyngitis by 6 months of age (P for trend=0.0004).
Conclusion
The results show that 89.9% of healthy newborns in Korea are born with vitamin D insufficiency or deficiency (55.6% and 34.3%, respectively). Cord blood vitamin D insufficiency or deficiency in healthy neonates is associated with an increased risk of acute nasopharyngitis by 6 months of age. More time spent outdoors and more intensified vitamin D supplementation for pregnant women may be needed to prevent the onset of acute nasopharyngitis in infants.
doi:10.3345/kjp.2013.56.10.439
PMCID: PMC3827492  PMID: 24244212
Cohort studies; Infant; Respiratory tract infections; Umbilical cord blood; Vitamin D
11.  Allergic Diseases in Preschoolers Are Associated With Psychological and Behavioural Problems 
Purpose
The aim of the present study was to investigate the relationship between three major allergic diseases, asthma, allergic rhinitis (AR), and atopic dermatitis (AD), and psychological and behavioural problems in preschoolers based on a community survey.
Methods
A cross-sectional survey was conducted using a modified International Study of Asthma and Allergies in Childhood questionnaire to determine the prevalence of symptoms and diagnosed allergic diseases, and a Korean version of the Child Behaviour Checklist to assess internalizing, externalizing, and sleep problems among 780 preschoolers. Five-hundred and seventy-five preschoolers with valid data were included in this study.
Results
The prevalence of lifetime diagnosis and treatment in the past 12 months was 8.7% and 4.4% for asthma, 24.4% and 19.2% for AR, and 35.1% and 16.6% for AD, respectively. Scores for internalizing and sleep problems were significantly higher in those diagnosed with AR. Preschoolers who had been treated for AD in the past 12 months had higher attention problem and attention-deficit/hyperactivity disorder scores. Sleep problems were more severe in moderate to severe AD compared to control and mild AD groups, categorised according to SCOring index of AD. The severity of sleep problems correlated positively with the percentage of eosinophils in peripheral blood.
Conclusions
Psychological and behavioural problems differed among the three major allergic diseases, weaker association for asthma and stronger association for AR and AD. The results of this study may lead to the identification of potential underlying shared mechanisms common to allergic diseases and psychological and behavioural problems.
doi:10.4168/aair.2013.5.5.315
PMCID: PMC3756179  PMID: 24003389
Preschool child; psychometrics; asthma; allergic rhinitis; atopic dermatitis
12.  Association Between the Daily Temperature Range and Occurrence of Spontaneous Intracerebral Hemorrhage 
Objective
We have observed, anecdotally, that the incidence of primary spontaneous intracerebral hemorrhage (sICH), as well as spontaneous subarachnoid hemorrhage, varies in accordance with seasonality and meteorological conditions. This retrospective single-hospital-based study aimed to determine the seasonality of sICH and the associations, if any, between the occurrence of sICH and meteorological parameters in Incheon city, which is a northwestern area of South Korea.
Methods
Electronic hospital data on 708 consecutive patients admitted with primary sICH from January 2008 to December 2010 was reviewed. Traumatic and various secondary forms of ICHs were excluded. Average monthly admission numbers of sICH were analyzed, in relation with the local temperature, atmospheric pressure, humidity, and daily temperature range data. The relationships between the daily values of each parameter and daily admission numbers of sICH were investigated using a combination of correlation and time-series analyses.
Results
No seasonal trend was observed in sICH-related admissions during the study period. Furthermore, no statistically significant correlation was detected between the daily sICH admission numbers and the meteorological parameters of temperature, atmospheric pressure and humidity. The daily temperature range tended to correlate with the number of daily sICH-related admissions (p = 0.097).
Conclusion
This study represents a comprehensive investigation of the association between various meteorological parameters and occurrence of spontaneous ICH. The results suggest that the daily temperature range may influence the risk of sICH.
doi:10.7461/jcen.2013.15.3.152
PMCID: PMC3804651  PMID: 24167793
Meteorology; Seasonality; Spontaneous intracerebral hemorrhage; Weather
13.  Natural Course of Initially Non-Operated Cases of Acute Subdural Hematoma : The Risk Factors of Hematoma Progression 
Objective
The objectives of the present study were to characterize the natural course of initially non-operated traumatic acute subdural hematoma (ASDH) and to identify the risk factors of hematoma progression.
Methods
Retrospective analysis was performed using sequential computed tomography (CT) images maintained in a prospective observational database containing 177 ASDH cases treated from 2005 to 2011. Patients were allocated to four groups as followings; 136 (76.8%) patients to the spontaneous resolution group, 12 (6.8%) who underwent operation between 4 hours and 7 days to the rapid worsening group (RWG), 24 (13.6%) who experienced an increase of hematoma and that underwent operation between 7 and 28 days to the subacute worsening group (SWG), and 5 (2.8%) who developed delayed aggravation requiring surgery from one month after onset to the delayed worsening group (DWG). Groups were compared with respect to various factors.
Results
No significant intergroup difference was found with respect to age, mechanism of injury, or initial Glasgow Coma Scale. The presence of combined cerebral contusion or subarachnoid hemorrhage was found to be a significant prognostic factor. Regarding CT findings, mixed density was common in the RWG and the SWG. Midline shifting, hematoma thickness, and numbers of CT slices containing hematoma were significant prognostic factors of the RWG and the SWG. Brain atrophy was more severe in the SWG and the DWG.
Conclusion
A large proportion of initially non-operated ASDHs worsen in the acute or subacute phase. Patients with risk factors should be monitored carefully for progression by repeat CT imaging.
doi:10.3340/jkns.2013.54.3.211
PMCID: PMC3836928  PMID: 24278650
Acute subdural hematoma; Chronic subdural hematoma; X-ray computed tomography
14.  Prophylactic Intrawound Application of Vancomycin Powder in Instrumented Spinal Fusion Surgery 
Korean Journal of Spine  2013;10(3):121-125.
Objective
We evaluated the effect of intrawound application of vancomycin powder for infection prophylaxis in wounds caused by instrumented spinal surgery.
Methods
From July 2012 to December 2012, 74 instrumented spinal fusion procedures were performed by 1 neurosurgeon at a single institute. We divided the patients into 2 groups, depending on the use of local application of vancomycin powder: Group A (intrawound application of vancomycin powder with perioperative intravenous cefazolin) and Group B (perioperative intravenous cefazolin alone). A retrospective cohort comparative study was conducted between the 2 groups. The age, sex, comorbidities, smoking, surgical procedure, and surgical site infection (SSI) of consecutive patients were analyzed.
Results
Among the 74 patients, 34 patients were assigned to group A and 40 patients to group B. No wound infections were found in group A. However, in group B, 5 cases of SSI (12.5%) were found. A statistically significant reduction in SSI incidence was observed in group A (p<0.033). The 5 cases of SSI in group B consisted of 3 cases of deep wound infection and 2 cases of superficial wound infection. All SSIs were found in cases of posterior approach surgery and tended to be more frequent in older patients.
Conclusion
Adjunctive intrawound local application of vancomycin powder is a simple uncomplicated procedure and can result in a significant reduction of SSI in instrumented spinal fusions. Furthermore, culture of the drainage tip is very important for confirmation of deep wound infection.
doi:10.14245/kjs.2013.10.3.121
PMCID: PMC3941757  PMID: 24757472
Wound infection; Spine; Instrumentation; Vancomycin
15.  Acute Hydrocephalus Following Cervical Spinal Cord Injury 
We present a case of acute hydrocephalus secondary to cervical spinal cord injury in a patient with diffuse ossification of the posterior longitudinal ligament (OPLL). A 75-year-old male patient visited the emergency department with tetraparesis and spinal shock. Imaging studies showed cervical spinal cord injury with hemorrhage and diffuse OPLL from C1 to C4. We performed decompressive laminectomy and occipitocervical fusion. Two days after surgery, his mental status had deteriorated to drowsiness with dilatation of the right pupil. Findings on brain computed tomography revealed acute hydrocephalus and subarachnoid hemorrhage in the cerebellomedullary cistern, therefore, extraventricular drainage was performed immediately. Acute hydrocephalus as a complication of cervical spine trauma is rare, however, it should be considered if the patient shows deterioration of neurologic symptoms.
doi:10.3340/jkns.2013.54.2.145
PMCID: PMC3809444  PMID: 24175033
Hydrocephalus; Spinal cord injuries; Ossification of the posterior longitudinal ligament of the spine
16.  Impact of Admission Month on Outcomes in Spontaneous Subarachnoid Hemorrhage: Evidence Against the March Effect 
Objective
We attempted to identify the presence of a so called 'March effect (or phenomenon)' (which had long been known as a 'July effect' in western countries), a transient increase in adverse outcomes during an unskilled period for new interns and residents in a teaching hospital, among a cohort of patients with spontaneous subarachnoid hemorrhage (sSAH).
Methods
A total of 455 consecutive patients with sSAH from our department database from 2008 to 2010 were enrolled retrospectively and the admission month, patient demographics and clinical characteristics, treatment modalities and discharge outcomes were analyzed. Multivariate regression analysis was used to determine whether unfavorable discharge and in-hospital mortality showed a significant increase during the unskilled months for new interns and residents (from March to May) in a pattern suggestive of a "March effect".
Results
Among 455 patients with sSAH, 113 patients were treated during the unskilled period (from March to May) and the remaining 342 patients were treated during the skilled period (from June until February of the next year). No statistically significant difference in demographics and clinical characteristics was observed between patients treated during these periods. In addition, the mortality and unfavorable discharge rates of the un-skilled period were 16.8% and 29.7% and those of the skilled period were 15.5% and 27.2%, respectively. However, no statistically significant difference was observed between them.
Conclusions
Findings of our study suggest that there was no 'March effect' on the mortality rate and unfavorable discharge rate among patients with sSAH in our hospital during the study period.
doi:10.7461/jcen.2013.15.2.67
PMCID: PMC3704997  PMID: 23844350
Spontaneous subarachnoid hemorrhage; March effect; Mortality rate; July effect; Teaching hospital
17.  Association between Maternal Characteristics and Neonatal Birth Weight in a Korean Population Living in the Seoul Metropolitan Area, Korea: A Birth Cohort Study (COCOA) 
Journal of Korean Medical Science  2013;28(4):580-585.
Previous studies suggest that maternal characteristics may be associated with neonatal outcomes. However, the influence of maternal characteristics on birth weight (BW) has not been adequately determined in Korean populations. We investigated associations between maternal characteristics and BW in a sample of 813 Korean women living in the Seoul metropolitan area, Korea recruited using data from the prospective hospital-based COhort for Childhood Origin of Asthma and allergic diseases (COCOA) between 2007 and 2011. The mean maternal age at delivery was 32.3 ± 3.5 yr and prepregnancy maternal body mass index (BMI) was 20.7 ± 2.5 kg/m2. The mean BW of infant was 3,196 ± 406 g. The overall prevalence of a maternal history of allergic disease was 32.9% and the overall prevalence of allergic symptoms was 65.1%. In multivariate regression models, prepregnancy maternal BMI and gestational age at delivery were positively and a maternal history of allergic disease and nulliparity were negatively associated with BW (all P < 0.05). Presence of allergic symptoms in the mother was not associated with BW. In conclusion, prepregnancy maternal BMI, gestational age at delivery, a maternal history of allergic disease, and nulliparity may be associated with BW, respectively.
doi:10.3346/jkms.2013.28.4.580
PMCID: PMC3617312  PMID: 23579316
Cohort Studies; Birth Weight; Infant, Newborn; Mothers; Family Characteristic; Body Mass Index; Allergy and Immunology
18.  Surgical Outcomes and Complications after Occipito-Cervical Fusion Using the Screw-Rod System in Craniocervical Instability 
Objective
Although there is no consensus on the ideal treatment of the craniocervical instability, biomechanical stabilization and bone fusion can be induced through occipito-cervical fusion (OCF). The authors conducted this study to evaluate efficacy of OCF, as well as to explore methods in reducing complications.
Methods
A total of 16 cases with craniocervical instability underwent OCF since the year 2002. The mean age of the patients was 51.5 years with a mean follow-up period of 34.9 months. The subjects were compared using lateral X-ray taken before the operation, after the operation, and during last follow-up. The Nurick score was used to assess neurological function pre and postoperatively.
Results
All patients showed improvements in myelopathic symptoms after the operation. The mean preoperative Nurick score was 3.1. At the end of follow-up after surgery, the mean Nurick score was 2.0. After surgery, most patients' posterior occipito-cervical angle entered the normal range as the pre operation angle decresed from 121 to 114 degree. There were three cases with complications, such as, vertebral artery injury, occipital screw failure and wound infection. In two cases with cerebral palsy, occipital screw failures occurred. But, reoperation was performed in one case.
Conclusion
OCF is an effective method in treating craniocervical instability. However, the complication rate can be quite high when performing OCF in patients with cerebral palsy, rheumatoid arthritis. Much precaution should be taken when performing this procedure on high risk patients.
doi:10.3340/jkns.2013.53.4.223
PMCID: PMC3698232  PMID: 23826478
Atlanto-occipital joint; Postoperative complications; Cerebral palsy; Rheumatoid arthritis
19.  Association of Antioxidants With Allergic Rhinitis in Children From Seoul 
Purpose
The prevalence of allergic diseases has risen over the last few decades. Many factors, including environmental factors such as those related to diet, have been considered. Among dietary factors, intake of antioxidant-related nutrients has been associated with the risk of allergic disease. We investigated the association of antioxidant nutritional status with allergic rhinitis (AR) in Korean schoolchildren aged 6-12 years.
Methods
Subjects were 4,554 children in Seoul, Korea. The risk of allergic disease was measured using the Korean version of the International Study of Asthma and Allergies in Childhood, and dietary intake was measured by a semi-quantitative food frequency questionnaire. Intake of vitamins A (including retinol and β-carotene), C, and E was used in the analysis.
Results
Vitamin C intake was negatively associated with an increased risk of current symptoms (adjusted odds ratio, 0.886; 95% confidence interval, 0.806-0.973). There was no association between AR and intake of vitamin A, retinol, β-carotene, or vitamin E. Total serum IgE level and sensitization to allergen did not differ according to nutrient intake.
Conclusions
The group of children with increased vitamin C consumption had fewer AR symptoms, despite the lack of a difference in total serum IgE level or allergen sensitization. These findings suggest that nutrient intake, especially that of vitamin C, influences AR symptoms.
doi:10.4168/aair.2013.5.2.81
PMCID: PMC3579096  PMID: 23450181
Allergic rhinitis; antioxidant; vitamin C
20.  Postoperative Cervical Cord Compression Induced by Hydrogel Dural Sealant (DuraSeal®) 
Korean Journal of Spine  2013;10(1):44-46.
Cerebrospinal fluid (CSF) leakage is a potential complication of cranial and spinal surgery. Postoperative CSF leakage can induce delayed healing, wound infection and meningitis. DuraSeal® (Covidien, Waltham, MA, USA) is a synthetic product which has been increasingly used to facilitate watertight repair of dural defects after cranial and spinal surgery. Despite some advantages of Duraseal®, the authors report a patient who developed cord compression following the use of DuraSeal® in cervical spine surgery in which the expansion of the DuraSeal® was believed to be the causative factor.
doi:10.14245/kjs.2013.10.1.44
PMCID: PMC3941731  PMID: 24757459
Dural sealant; DuraSeal®; CSF leakage
21.  Combined Open Door Laminoplasty with Unilateral Screw Fixation for Unstable Multi-Level Cervical Stenosis : A Preliminary Report 
Objective
The authors reviewed their experiences of combined surgery (open door laminoplasty with unilateral screw fixation) for unstable multi-level cervical stenosis, to clarify the situation regarding the surgical approach most appropriate for the treatment of diffuse unstable multi-level cervical stenosis.
Methods
From January 2011 to January 2012, combined surgery was performed for unstable multi-level cervical stenosis by one surgeon at our institution. The subjects of this study were 6 men of mean age 53.7 years (range, 48-71) with a mean follow-up of 9.3 (range, 3-14) months. All imaging studies showed severe multi-level cervical stenosis with spinal cord signal change, and instability or kyphotic deformity. A retrospective review of clinical, radiological, and surgical data was conducted.
Results
Average laminoplasty level was 4.8 and the average screw fixation level was 5.0. Japanese Orthopedic Association score improved from an average of 5.2 to 11.2 points. According to Nurick's grades and Odom's criteria, symptom improvement was statistically significant. On the other hand, Cobb's angle changes were not significant. Average operation time was 5.86 hours with an average blood loss of 460 mL. No significant surgical complication was encountered.
Conclusion
Despite the small cohort and the short follow-up duration, the present study demonstrates that laminoplasty with unilateral screw fixation is a safe and effective treatment for unstable multi-level cervical stenosis.
doi:10.3340/jkns.2013.53.2.83
PMCID: PMC3611064  PMID: 23560171
Laminoplasty; Lateral mass screw fixation; Japanese Orthopedic Association score
23.  Comparison between Clinical Disabilities and Electrophysiological Values in Charcot-Marie-Tooth 1A Patients with PMP22 Duplication 
Background and Purpose
Charcot-Marie-Tooth disease (CMT) type 1A (CMT1A) is the demyelinating form of CMT that is significantly associated with PMP22 duplication. Some studies have found that the disease-related disabilities of these patients are correlated with their compound muscle action potentials (CMAPs), while others have suggested that they are related to the nerve conduction velocities. In the present study, we investigated the correlations between the disease-related disabilities and the electrophysiological values in a large cohort of Korean CMT1A patients.
Methods
We analyzed 167 CMT1A patients of Korean origin with PMP22 duplication using clinical and electrophysiological assessments, including the CMT neuropathy score and the functional disability scale.
Results
Clinical motor disabilities were significantly correlated with the CMAPs but not the motor nerve conduction velocities (MNCVs). Moreover, the observed sensory impairments matched the corresponding reductions in the sensory nerve action potentials (SNAPs) but not with slowing of the sensory nerve conduction velocities (SNCVs). In addition, CMAPs were strongly correlated with the disease duration but not with the age at onset. The terminal latency index did not differ between CMT1A patients and healthy controls.
Conclusions
In CMT1A patients, disease-related disabilities such as muscle wasting and sensory impairment were strongly correlated with CMAPs and SNAPs but not with the MNCVs or SNCVs. Therefore, we suggest that the clinical disabilities of CMT patients are determined by the extent of axonal dysfunction.
doi:10.3988/jcn.2012.8.2.139
PMCID: PMC3391619  PMID: 22787498
charcot-marie-tooth disease; CMT1A; compound muscle action potential; duplication; nerve conduction velocity; sensory nerve action potential
24.  The Comparative Study of Microsurgical Cerebral Aneurysm Clip Implants; Titanium Clip vs. Stainless Steel Clip 
Objective
To perform a comparative study between two groups of populations, titanium (T) group versus stainless steel (S) group, who were clipped with titanium and stainless steel materials, respectively, the incidence of regrowth from the original aneurysms, the clip slippage, and post-clipping seizure attack were analyzed. The patients were followed more than 5 years after microsurgical cerebral aneurysms clipping.
Methods
Data from 1986 through 2008 were extensively reviewed on a consecutive series of 3,770 patients who referred for ruptured/unruptured cerebral aneurysms. Forty-seven patients in the S group and 48 in the T group who met inclusion criteria, were selected for this study.
Results
The incidence of regrowth were noted that two out of total 47 patients (4.3%) in the S group, and none in the T group. The clip slippage was not observed in both groups. And there was no statistical difference (p = 0.242) in terms of regrowth between two groups. Seven out of 47 cases (14.9%) developed post-clipping seizure in the S group. On the other hand, two (4.2%) of 48 patients presented the symptom in the T group. Also, there was no significant difference (p = 0.091) between two groups.
Conclusions
The metallic types of clip employed for the microsurgical cerebral aneurysm clipping does not have any significant clinical outcome differences in this study.
doi:10.7461/jcen.2012.14.2.79
PMCID: PMC3471257  PMID: 23210032
Microsurgical clipping; Aneurysm; Stainless steel aneurysmal clip; Titanium aneurysmal clip
25.  Updates in the Relationship Between Human Rhinovirus and Asthma 
Human rhinovirus (HRV) is a nonenveloped, single stranded RNA virus belonging to the family Picornaviridae. HRV infections can cause both upper and lower respiratory illnesses in children and adults. Lower respiratory illnesses are more likely to occur in specific high risk groups, including infants, and children and adults with asthma. The relationships between rates of infection and the risk of clinical illness and exacerbation are not completely understood. Recent studies employing polymerase chain reaction and other molecular techniques indicate that there are new branches on the HRV family tree, and one characteristic of recently detected viruses is that they cannot be detected by standard tissue culture. Here we review the current literature and discuss new advances in understanding the link between HRV and asthma.
doi:10.4168/aair.2012.4.3.116
PMCID: PMC3328727  PMID: 22548203
Asthma; human rhinovirus; infection

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