We measured corneal endothelial cell density of 100 normal eyes of 50 Korean volunteers on central, superior, inferior, nasal and temporal aspect, respectively. Non-contact specular microscopy were used for measurement. The data thus obteined were analyzed according to the following parameters: age, laterality, sex and location(central vs. peripheral). Corneal endothelial cell density showed gradual decrement with age, but no significant statistically differences with laterality and sex. The results showed a large difference in corneal endothelial cell density depending on the location, although they failed to show statistical significant(P>0.05).
Cell Count* ; Endothelial Cells ; Microscopy* ; Volunteers

Recently, intracameral injection of 1% unperserved lidocaine was intro-duced as a supplement to the topical anesthesia in cataract operations. We evaluated the effect of intracameral lidocaine on the corneal endothelium. One hundred eyes of 90 patients undergone scleral tunnel incision and phacoemulsification with posterior chamber intraocular lens implantation were divided into 2 group according to the methods of anesthesia. Topical anesthesia with intracameral injection of 0.2 of 1% unpreserved lidocaine was used to the 50 eyes of 45 patients[group 1] and pinpoint anestesia to the rest[group 2]. Specular microscopy using non-contact specular microscope was done preoperatively, 1 week, 1 month and 3 months postoperatively to compare the endothelial morphologic changes between the 2 groups. The reduction of central corneal endothelial cell density at 3 months postoperatively was 9.45% in Group 1 and 8.74% in Group 2. The difference between the 2 groups was not significant statistically[p>0.1]. Postoperative changes in coefficient of variation[polymegathism] and hexagonality[pleomorphism] were not significantly different between the 2 groups either[p>0.1]. We therefore concluded that intracameral injection of 1% unpreserved lidocaine does not adversely affect the corneal endothelial cell function and morphology and may safely be used as a supplement to topical anesthesia in cataract surgeries.
Anesthesia ; Cataract* ; Endothelial Cells ; Endothelium, Corneal* ; Humans ; Lens Implantation, Intraocular ; Lidocaine* ; Microscopy ; Phacoemulsification

Thirty patients who coincided with CVA and MI, from january 1980 to August 1984, at Department of Internal Medicine, Kyung Hee University Hospital, were studied. And the following results were obtained; 1) The ratio of male to female was 2:1. The average age was 61.6 years. The in-hospital mortality rate was higher than cerebrovascular accident or myocardial infarction alone. 2) The most common risk factor was hypertension(83%), smoking(64%), hyperlipidemia(57%) and diabetes mellitus(33%) in order of frequency. 3) Fifteen cases of 30 patients had acute episode of MI and CVA during hospitalization and showed highest in -hospital mortality rate(66.7%). 4) There was no difference in mortality rate between cereral infarction and cerebral hemorrhage.
Cerebral Hemorrhage ; Female ; Hospital Mortality ; Hospitalization ; Humans ; Infarction ; Internal Medicine ; Male ; Mortality ; Myocardial Infarction* ; Risk Factors ; Stroke*

Purpose: The purpose of this study was to identify the experiences of insomnia symptoms in the elderly living alone in the community. Methods: Eleven of the elderly with insomnia symptoms living alone in the community were interviewed. Data were collected through individual interviews July-September 2018. Colaizzi’s phenomenological methodology was used. Results: Results showed that the experiences of insomnia symptoms of the elderly living alone comprised 11 themes clusters and five categories: 1) Insomnia symptoms triggered by various causes, 2) Physical symptoms exacerbated by insomnia, 3) Insomnia worsened by psychological symptoms, 4) Useless efforts to fix insomnia, 5) Living with adapted insomnia symptoms. Conclusion It is necessary to develop a sleep intervention program that includes insomnia symptoms awareness, sleep health education, and social support factors. Community nurses should focus on insomnia symptoms as well as listen and empathize with various psychological phenomena in caring for the elderly with insomnia living alone.

PURPOSE: The objective of this study was to investigate the effect of TMJ disc displacement on the TMJ disc configuration and surrounding osseous structure. MATERIALS AND METHODS: The proton density and T2-weighted MR images of 57 TMJs were retrospectively studied. These TMJs were divided into three groups according to the anterior disc displacement status on MR sagittal images, those were the normal, anterior disc displacement with reduction (ADWR), anterior disc displacement without reduction (ADWOR). The frequency of disc configuration and surrounding bony change, the border status between articular disc and retrodiscal tissue were investigated according to the positional change of articular disc. RESULTS: There were significant statistical differences of chi-square statistics of TMJ disc configurational type between normal and ADWR/ADWOR group, respectively. Surrounding bony change frequently appeared in ADWOR and a statistically significant difference of chi-square statistics of bony change frequency between normal and ADWOR group was observed. CONCLUSION: These results suggested that the disc configuration and bony change of TMJ are strongly related to TMJ disc displacement.
Magnetic Resonance Imaging ; Protons ; Retrospective Studies ; Temporomandibular Joint*

OBJECTIVES: To estimate the value of statistical life (VSL) and health damage cost on theoretical mortality estimates due to environmental pollution. METHODS: We assessed the health risk on three environmental problems and eight sub-problems. Willingness to pay (WTP) was elucidated from a questionnaire survey with dichotomous contingent valuation method and VSL (which is the division of WTP by the change of risk reduction) calculated from WTP. Damage costs were estimated by multiplying VSL by the theoretical mortality estimates. RESULTS: VSLs from death caused by air pollution, indoor air pollution and drinking water contamination were about 0.3, 0.5 and 0.3 billion won, respectively. Damage costs of particulate matters (PM10) and radon were higher in the sub-problems and were above 100 billion won. Because damage cost depends on theoretical mortality estimate and WTP, its uncertainty is reduced in the estimating process. CONCLUSION: Health damage cost or risk benefit should be considered as one scientific criterion for decision making in environmental policy.
Air Pollution ; Air Pollution, Indoor ; Cost-Benefit Analysis ; Decision Making ; Drinking Water ; Environmental Policy ; Environmental Pollution ; Methods ; Mortality* ; Radon ; Risk Assessment ; Uncertainty

Brachial plexus block has been evaluated in 192 cases of surgery of the upper extremities performed during the past 13 years and 9 months. (from Jan. 1958 to Sept. 1971) We have assessed supraclavicular and axillary brachial plexus block using 1% to 2% procaine and lidocaine adding adrenaline case by case. The dosage given was 30 ml to 40 ml in each case There were 142 males and 50 females. In 26 blocks judged unsatisfactory for surgery, we have usually substituted inhalation anesthesia and .2 cases were supplimented with intravenous thiopental sodium, 2.5%, 3 ml to 5 ml intermittently and 4 cases with intravenous thiopental sodium and meperidine. There were 4 cases of complications of supraclavicular brachial plexus block including 2 cases of pneumothorax, one of Horners syndrome only and a cardiac arrest immediately after block. There were no complications in axillary approaches. Therefore in conclusion this brachial plexus block was a simple and useful technic in surgery and treatment of the upper extremities.
Anesthesia, Inhalation ; Brachial Plexus* ; Epinephrine ; Female ; Heart Arrest ; Horner Syndrome ; Humans ; Lidocaine ; Male ; Meperidine ; Pneumothorax ; Procaine ; Thiopental ; Upper Extremity

PURPOSE: To detect the progression of experimentally induced periapical lesions on periapical radiograph and cone beam computed tomograph (CBCT) by quantitative analysis. MATERIALS AND METHODS: After the removal of coronal pulps from premolars of two Beagle dogs, the root canals of premolars were exposed to oral environment during one week and then sealed for 70 days. Digital periapical radiographs and CBCTs were taken at baseline and every 7 days for 77 days after pulp exposure. We examined occurrence and areas of periapical bone resorption. Three comparative groups of CBCT radiographs were prepared by average projection of thin slabs with different bucco-lingual thicknesses (0.1, 3.0, and 8.0 mm) using a 3D visualization software. Radiographic densities were compensated by image normalization. Digital images were processed with mathematical morphology operations. The radiographic density and morphological features of periapical lesions were compared among three groups of CBCT in different time points. RESULTS: In the CBCT group with 0.1 mm thickness, radiographic density (p<0.05) and trabecular bone area (p<0.01) were significantly decreased at the fifth week. However, in the CBCT groups with 3 mm and 8 mm thickness and periapical radiographs, none of densitometric and morphological features showed any significant differences in different time points. Radiographic density of periapical lesion showed increasing tendency at the eleventh week after pulp exposure. CONCLUSION: Radiographic detection of periapical lesions was possible at the fifth week after pulp contamination by quantitative method and was affected by buccolingual bone thickness.
Animals ; Bicuspid ; Bone Resorption ; Dental Pulp Cavity ; Dogs

The diagnosis of atrial septal defect by transthoracic echocardiography remains difficult in a small subset of patients because of either suboptimal acoustic windows or unusual anatomy, for example, fenestrated defects. wer report the case of a 52-year-old woman with a fenestratdd atrial septal aneurysm that was incompletely visualized by transthoracic echocardiography. Subsequent transesophageal echocardiography demonstrated atrial septal defect and two fenestrations within the atrial septal aneurysm with left-to-right shunting. All echocardiographic findings were confirmed at surgery. This case demonstrates the addinional diagnostic accuracy of transesophageal echocardiography for detecting disease of the atrial septum.
Acoustics ; Aneurysm* ; Atrial Septum ; Diagnosis ; Echocardiography ; Echocardiography, Transesophageal ; Female ; Heart Septal Defects, Atrial* ; Humans ; Middle Aged

Basal cell nevus syndrome (BCNS) is principally characterized by cutaneous basal cell carcinomas, multiple odontogenic keratocysts and skeletal abnormalities. Our patient represented several characteristics of BCNS, such as, multiple odontogenic keratocysts, facial nevus, calcification of falx cerebri, parietal bossing and mental retardation. The cyst on posterior mandible showed recurrent and newly developing tendency.
Basal Cell Nevus Syndrome* ; Carcinoma, Basal Cell ; Humans ; Intellectual Disability ; Mandible ; Nevus ; Odontogenic Cysts* ; Rabeprazole