Inhibition of K⁺ outward currents by linopirdine in the outer hair cells (OHCs) of circling mice (homozygous (cir/cir) mice), an animal model for human deafness (DFNB6 type), was investigated using a whole cell patch clamp technique. Littermate heterozygous (+/cir) and ICR mice of the same age (postnatal day (P) 0 –P6) were used as controls. Voltage steps from –100 mV to 40 mV elicited small inward currents (–100 mV~–70 mV) and slow rising K⁺ outward currents (–60 mV ~40 mV) which activated near –50 mV in all OHCs tested. Linopirdine, a known blocker of K⁺ currents activated at negative potentials (I(K,n)), did cause inhibition at varying degree (severe, moderate, mild) in K⁺ outward currents of heterozygous (+/cir) or homozygous (cir/cir) mice OHCs in the concentration range between 1 and 100 µM, while it was apparent only in one ICR mice OHC out of nine OHCs at 100 µM. Although the half inhibition concentrations in heterozygous (+/cir) or homozygous (cir/cir) mice OHCs were close to those reported in I(K,n), biophysical and pharmacological properties of K⁺ outward currents, such as the activation close to –50 mV, small inward currents evoked by hyperpolarizing steps and TEA sensitivity, were not in line with I(K,n) reported in other tissues. Our results show that the delayed rectifier type K⁺ outward currents, which are not similar to I(K,n) with respect to biophysical and pharmacological properties, are inhibited by linopirdine in the developing (P0~P6) homozygous (cir/cir) or heterozygous (+/cir) mice OHCs.
Animals ; Deafness ; Hair Cells, Auditory, Outer* ; Humans ; Mice* ; Mice, Inbred ICR ; Models, Animal ; Tea

A clinical review of 212 cases of tuberculous cervical lymphadenitis during the past 6 years from January 1990 to December 1995 was made at the Department of General Surgery, Eul ji Medical College Hospital,Taejeon. The results are as follows: 1) The age of peak incidence was the 3rd decade (43.3%), and females predominated over males by 3.1 : 1. 2) The time interval from the onset of symptoms to the first visit was less than 3 months in 53.3% of the patients. 3) The location of lymphadenitis was the right neck in 59.9%, the left neck 38.7%, and bilateral in 1.4% of the patients. 4) Signs on the first visit were a mass, a cold abscess and/or a discharge. A palpable mass was the most frequent symptom (86.8%). 5) The incidence of associated pulmonary tuberculosis was 26.9%. 6) Seventy patients (33.0%) had a past history of tuberculosis. Among them, 55.7% had lymphadenitis, 28.6% pulmonary tuberculosis, and 15.7% medical problems at other sites. 7) Treatments of tuberculous cervical lymphadenitis were chemotherapy alone (68.4%) or surgical management combined with chemotherapy (31.6%). The surgical treatments included excision, incision and drainage, and neck dissection in 17.5%, 13.2%, and 0.9% of the patients, respectively. 8) The rate of recurrence was 3.1% (5 cases) for 160 cases, among them, 1.2% (2 cases) involved chemotherapy alone and 1.9% (3 cases) surgery with chemotherapy. The other 52 cases were lost from follow up.
Abscess ; Drainage ; Drug Therapy ; Female ; Follow-Up Studies ; Humans ; Incidence ; Lymphadenitis* ; Male ; Neck ; Neck Dissection ; Recurrence ; Tuberculosis ; Tuberculosis, Pulmonary

No abstract available.
Polyarteritis Nodosa*

Child abuse and neglect are also becoming a serious threat to the health of children in Korea. Most of abused or neglected children are suffered from some mental problems. Psychiatrists are a important position to evaluate and/or treat the emotional or behavioral problems resulting from child abuse or neglect. It is crucial that psychiatrists define their role and develop the appropriate clinical skills to manage child abuse or neglect effectively. This article reviews the clinically relevant literature on the child abuse and neglect including the strategic agenda of the Korean Medical Association for promoting of optimal child health and development comprehensively.
Child ; Child Abuse* ; Child Health ; Child* ; Clinical Competence ; Humans ; Korea ; Psychiatry

OBJECTIVE: The ovarian cycle is characterized by repeating patterns of cellular proliferation and differentiation that accompany follicular development and the formation and regression of the corpus luteum (CL). That angiogenesis may play an important role in this process. Angiogenesis is supposed to be regulated by vascular endothelial growth factor (VEGF). The goal of the present investigation, therefore, was to determine whether the expression of VEGF was changed in the normally cycling human ovary. We also investigated VEGF expression in the regressed CL (ie, nonfunctiong CL) of normal term pregnancy to define the association with steroidogenic activity. To our knowledge there is no report available on VEGF expression in the CL of term pregnancy. METHODS: We assessed VEGF expression in ovaries obtained from, 26-42 yr of age, and from patients undergoing hysterectomy and salpingo-oophorectomy for nonendocrinological or nonovarian disorders. Tissue samples from premenopausal women included specimens from follicular (n=4) and luteal (n 4) phases. In addition, we studied ovarian specimens from pregnant women (n=3). Immunohistochemical analysis for VEGF was performed using a rabbit polyclonal antibody directed against human VEGF. RESULTS: These data demonstrate a development-related VEGF expression in the follicle and indirectly show that VEGF expression may be up to the existence of LH-receptor. And also, VEGF was overexpressed in the regressed CL of pregnant women compared with the functioning CL of nonpregnant cycles CONCLUSION: This study suggests that the intensity of VEGF expression is not correlated with steroidogenic activity, although both of them are stimulated by LH.
Cell Proliferation ; Corpus Luteum ; Female ; Humans* ; Hysterectomy ; Menstrual Cycle ; Ovarian Follicle ; Ovary* ; Pregnancy ; Pregnant Women ; Vascular Endothelial Growth Factor A*

No abstract available.
Apoptosis* ; Placenta Previa* ; Placenta*

No abstract available.
Amnion* ; Cyclooxygenase 2*

PURPOSE: Chest compression is the corner stone of resuscitation. As a result, many studies insist on the importance of retention of skill performance. But there are weak points. First, a unique characteristic of skill is ignored, "the more practice, the better outcome". Second, no one knows when they have a proficiency in a skill. Learning curve-CUSUM analysis is a good tool to evaluate each trainee's performance. Hence, we designed this study to evaluate each trainee's proficiency in performing chest compression using LC-CUSUM analysis. METHODS: Four medical students were enrolled. We asked them to perform chest compression for two minutes per day without any intervention over six weeks. Data included the depth and rate of chest compression. Eventually, all trainees performed chest compression at least 30 times. We plotted the LC-CUSUM curve according to the results of attempts, successes or failures. RESULTS: According to median values of the depth and rate of chest compression through the 30th attempt, trainees had performances within the acceptable range, 40~49 mm (for depth) and 100~105 beats per minutes (for rate) of chest compression. Nonetheless, LC-CUSUM analysis indicated that two trainees no longer were proficient throughout, and even though the rest of them were once proficient, they appear to have lost that proficiency regarding depth of chest compression. LC-CUSUM analysis of rate of compression showed that all trainees had proficiency during the early phase. CONCLUSION: We propose that instructors can evaluate their trainees' proficiency easily, based on LC-CUSUM analysis.
Cardiopulmonary Resuscitation ; Clinical Competence ; Humans ; Learning ; Resuscitation ; Retention (Psychology) ; Students, Medical ; Thorax ; Training Support

K+ outward currents in the outer hair cells (OHCs) of circling mice (homozygous (cir/cir) mice), an animal model for human deafness (DFNB6 type), were investigated using a whole cell patch clamp technique. Littermate heterozygous (+/cir) mice of the same age (postnatal day (P) 0 -P6) were used as controls. Similar slow rising K+ currents were observed in both genotypes, but their biophysical and pharmacological properties were quite different. The values of V(half) for activation were significantly different in the heterozygous (+/cir) and homozygous (cir/cir) mice (-8.1+/-2.2 mV, heterozygous (+/cir) mice (n=7) and -17.2+/-4.2 mV, homozygous (cir/cir) mice (n=5)). The inactivation curve was expressed by a single first order Boltzmann equation in the homozygous (cir/cir) mice, while it was expressed by a sum of two first order Boltzmann equations in the heterozygous (+/cir) mice. The K+ current of homozygous (cir/cir) mice was more sensitive to TEA in the 1 to 10 mM range, while the 4-AP sensitivities were not different between the two genotypes. Removal of external Ca2+ did not affect the K+ currents in either genotype, indicating that the higher sensitivity of K+ current to TEA in the homozygous (cir/cir) mice was not due to an early expression of Ca2+ activated K+ channels. Our results suggest that the K+ outward current of developing homozygous (cir/cir) mice OHCs is different in both biophysical and pharmacological aspects than that of heterozygous (+/cir) mice.
Animals ; Deafness ; Genotype ; Hair* ; Humans ; Mice* ; Models, Animal ; Potassium Channels, Calcium-Activated ; Tea

PURPOSE: Study purposes were to exam effects of self-care education for children with type 1 diabetes on their diabetes management behaviors and to explore the relationship among diabetes management behaviors, knowledge, self-efficacy and clinical variables. METHODS: This study was a one group quasi-experimental study. Study participants were children with type 1 diabetes and attended a four hour self-care education of a diabetes camp. Data were collected using structured questionnaires including Diabetes Management Behavior Scale (DMBS), Michigan Diabetes Research and Training Center's Brief Diabetes Knowledge Test and Self-Efficacy for Diabetes Self-Management. RESULTS: The mean age of the participants was 12 (+/-2.3) years. After the education, their DMBS and knowledge improved, but the improvement was not statistically significant (t=1.758, p=.101; t=0.528, p=.606). Two areas of DMBS, daily prevention behaviors and modification of care plan, were associated with study variables. Daily prevention behaviors were associated with duration of diabetes (r=.653, p=.008), HbA1c (r=.563, p=.038) and having a complication (r=-2.788, p=.015). Modification of care plan was associated with age at diagnosis (r=-.552, p=.033). CONCLUSION: Children with type 1 diabetes could improve some parts of their diabetes management behaviors even after a short diabetes camp.
Child* ; Diabetes Mellitus, Type 1 ; Diagnosis ; Disease Management ; Education* ; Humans ; Michigan ; Self Care* ; Self Efficacy