• 한국임상보건과학회지
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• 제11권1호
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• pp.1632-1638
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• 2023

Purpose: The aim of this study was to determine the distribution of the cornea thickness and intra ocular pressure Korean adult of 20 to 24 year old using the Pentacam and tonometer. Methods: The subjects of this study were 43 Korean adults with healthy eyes. Corneal thickness was measured with Pentacam device. The intra ocular pressure was measured with tonometer. Data was analyzed by means of the Pearson's correlation cofficient. P-values<0.001 were considered statistically significant. Results: Mean age of subjects was 20.41±0.86 years. The mean +/- intra ocular pressure of the right eye and left eye were 16.236±2.523mmHg and 16.971±1.992mmHg, respectively. The mean central corneal thickness of the right eye and left eye was 545.324±38.682㎛ and 547.442±33.778㎛, respectively. No significant difference in central corneal thickness was found between the right and left eyes. But, there was a statistically significant difference between central cornea thickness and peripheral cornea thickness around 4 mm of central cornea(p<0.001, Pearson's correlation). However there was no statistically significant difference between central cornea thickness and intra ocular pressure. Conclusion: The results of this study could be used as a clinical reference data for diagnosis and treatment of cornea in Korean adult.

• 한국안광학회지
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• 제8권1호
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• pp.41-45
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• 2003

노인성 백내장의 세 가지 형태학이 굴절이상에 미치는 영향에 관하여 연구하기 위해 세 가지 형태의 백내장 특성에 따른 구면 굴절력과 원주 굴절력의 변화를 백내장의 형태적인 위치에서 나타내었고 또한 백내장 수술 전후의 안압이 굴절이상에 어떠한 영향을 주는가에 대하여 연구하였다. 등가 구면 굴절력에서 핵 백내장은 근시성 전환, 피질 백내장은 원시성 전환을 보였고 낭 백내장은 양쪽의 전환 폭이 적은 것으로 나타났다. 수정체 내 백액내장의 해부학적 위치를 확인하기 위해 광학단면(세극등)을 이용하여 관찰하였고 굴절이상을 측정하기 위해 타각적, 그리고 자각적 방법을 사용하여 등가 구면 굴절력으로 나타내었다. 안압 측정은 수술전과 수술 후 인공수정체가 삽입된 일주일 뒤에 다사 각각의 상태에서 안압을 자동 안압계를 사용하여 측정하였다. 원주 굴절력의 변화는, 일반적으로 나이가 증가함에 따라 안축의 길이가 감소하는 경향을 보였지만, 백내장의 진행으로 안압이 높아져 안축의 길이가 증가하게되고 그 영향으로 직난시에서 도난시로의 전환에 영향을 주기도 하고 또한 이것이 안압으로 인해 더욱 증가하기도 함을 알 수 있었다.

• 한국임상수의학회지
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• 제36권6호
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• pp.325-329
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• 2019

This study was designed to compare the effects of continuous release of an anti-glaucoma drug applied by an osmotic pump and by conventional eye drop instillation in normal beagle dogs, by measuring drug concentration in the blood and monitoring intra-ocular pressure (IOP). In group 1, an osmotic pump filled with Trusopt® was implanted subcutaneously over the right eye of each dog and the IOP was measured. In group 2, the right eye of each dog was administered with 2% dorzolamide (Trusopt®, Merck, USA) three times per day. Blood was sampled once per week in all groups. The IOP of the end of this study was 16.7 ± 0.58 mmHg in group 2 and 17.7 ± 2.52 mmHg in group 2. Dorzolamide concentration in blood increased continuously over 4 weeks up to 585.8 ± 79.42 ㎍/L in group 1, and 747.3 ± 27.89 ㎍/L in group 2. We achieved satisfactory results in the osmotic pump group, which had a similar effect on IOP, and low fluctuations in IOP. Therefore, the results of this study should allow osmotic pumps to be consider as an alternative method to eye drops for the effective, safe, and convenient treatment of glaucoma.

• 제어로봇시스템학회논문지
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• 제21권7호
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• pp.609-614
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• 2015

Implanted telemetry systems provide the ability to monitor different species of animals while they move within their cages. Species monitored include mice, rats, rabbits, dogs, pigs, primates, sheep, horses, cattle, and others. A miniature transmitter implanted in each animal measures one or more parameters. Parameters measured include arterial pressure, intra-pleural pressure, left ventricular pressure, intra-ocular pressure, bladder pressure, ECG, EMG, EEG, EOG, temperature, activity, and other parameters and transmits the data via radio frequency signals to a nearby receiver. Every conventional dedicated transmitter contains one or more sensors, cpu and battery. Due to the expected life of the battery, the measuring time is limited. To overcome these problems, electromagnetic inductive coupling based wireless power transmission technology using multiple transmit coils were proposed, with each coil having a different active area driven by the coil driver. In this research, a parallel resonance based coil driver and serial resonance based coil driver are proposed. From the experiments we see that the parallel coil driver shows better performance under a low impedance and multiple coils configuration. However, the serial coil driver is more efficient for high impedance transmit coils.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.103.6-103
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• 2001

Glaucoma is an eye disease which is caused by abnormal high IOP (Intra Ocular Pressure) in the eye. High IOP is caused by the aqueous humor which is produced consistently but not drained due to the malfunction of the trabecular system which has a role of draining the aqueous humor into the venous system. Currently, there are some methods to treat glaucoma, Among these, the use of implants is increasing in these days due to many problems in other methods. However, conventional implants are passive implants and have critical disadvantage. Therefore, it is needed to develop a new implant using MEMS structure which is capable of controlling the IOP actively and copes with personal difference of patients. An active glaucoma implant consists of the valve actuator, pressure sensor, controller, and power supply. In this paper the valve actuator is considered. We make experiments and simulations with the fabricated ...

• 한국인터넷방송통신학회논문지
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• 제15권2호
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• pp.203-211
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• 2015

신약개발이나 동물연구 등에서 연구대상 동물이 케이지(cage) 안에서 자유롭게 움직이고 있는 상태에서 무선으로 다량의 데이터를 수집하는 장치는 실험동물 신체 내부에 배터리로 구동되는 소형발신기를 내장시켜 혈압, 온도, 심박수, Electrocardiogram(ECG), Electroencephalography(EEG) 등의 정보를 근접통신을 통해 근처의 수신기로 전달하게 된다. 이러한 장비는 한정된 내부의 배터리를 이용하기 때문에 측정시간의 한계가 있으며, 이러한 문제를 해결하기 위해서 전자기유도방식의 단점인 발신부와 수신부사이의 거리가 멀어질 때 발생하는 효율저하문제를 극복하기 위하여 다중코일 구조를 이용한 무선전력전송 구동 드라이버를 제안하였으며, 다중코일 중 수신부가 놓인 코일을 선택하기 위한 수신부 감지 장치도 제시되었다. 또한 실험을 통하여 제안된 구동드라이버 및 수신부 감지 회로의 구동 조건 선정 과정을 제시하였다.

• 대한기계학회논문집A
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• 제25권5호
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• pp.805-815
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• 2001

Glaucoma is an eye disease which is caused by abnormal high IOP (Intra Ocular Pressure). High IOP is caused by the aqueous humor which is produced consistently but not drained due to malfunction of the trabecular system which has a role of draining the aqueous humor into the venous system. Currently, there are three methods to treat glaucoma-using medicines, surgical operation, and using implant device. The first and second methods are not long acting, so the use of implants is increasing in these days in order to drain out the aqueous humor compulsory. However, though conventional implants have a capability of pressure regulation, they cannot maintain IOPs desired for different patients, and too much aqueous humor are usually drained, to cause hypotony. To solve these problems, it is needed to develop a new implant which is capable of controling the IOP actively and copes with personal difference of patients. An active glaucoma implant consists of the valve actuator, pressure sensor, controller, and power supply. In this paper, firstly, we make an analysis of the operation of a conventional implant using a bond graph and show defects and limitations of the conventional valve analytically. Secondly, we design and analyze a valve actuator considering actuation principles, resistance elements, control methods, and energy sources focused on power saving problem. Finally, using simulations the possibility of the proposed valve actuator is investigated.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 C
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• pp.1875-1877
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• 2001

Glaucoma is an eye disease which is caused by abnormal high lOP (Intra Ocular Pressure). High lOP is caused by the aqueous humor which is produced consistently but not drained due to malfunction of the trabecular system which has a role of draining the aqueous humor into the venous system. Currently, there are some methods to treat glaucoma, Among these, the use of implants is increasing in these days due to many problems In other methods. However, conventional implants are passive implants and have critical disadvantage. Therefore, it is needed to develop an active implant which is composed of a valve actuator, pressure sensor, controller, and power supply. In this paper, we make experiment with the fabricated valve actuator in In-vitro experiment, and estimate the in-vivo result using the experimental result and investigate the possibility of the fabricated valve.

• 한국안광학회지
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• 제13권1호
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• pp.131-135
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• 2008

목적: 한국 정상인 청년의 안압에 영향을 미치는 요인을 조사하고자 실시하였다. 방법: 정상인 청년 805명(남: 367, 여: 438)을 대상으로 비접촉식 안압계인 AT555 Tonometer(Reichert사)를 사용하여 조사대상자의 기본 안압을 측정하였으며 안압변동에 영향을 미치는 요인으로 주시, 기대는 자세, 순목의 경우는 남녀 각각 6명을 대상으로 10~30분 동안 요인에 따른 우좌안의 안압 변동을 조사하였으며 음수, 음주, 담배, 커피는 측정안압이 유사한 6명씩을 한 집단으로 하여 각 요인별로 4~5개 집단의 우안 안압변동을 조사하였다. 결과: 조사대상자의 평균안압은 남녀에서 각각 15.2 mmHg와 15.8 mmHg로 여자가 약간 더 높았으며 99%가 평균안압의 범위 내에 있었다. 주시, 기대는 자세, 의식적인 순목에 의하여 남녀의 안압은 각각 우좌안에서 기울기가 0.15, 0.13/0.07, 0.08와 0.09, 0.08/0.08, 0.08 및 0.19, 0.08/0.26, 0.31의 추세선으로 상승하였다. 음수에 의해 안압이 상승하였는데 1000 ml 이상에서 변동폭이 현저하였으며 음주에 의해서는 음주량에 비례하여 안압이 감소하였다. 흡연 시에는 안압이 증가하였으며 흡연량과는 유의성 있는 연관을 보이지 않았다. 커피에 의해서는 유의성 있는 안압변동을 보이지 않았다. 결론: 주시, 기대는 자세, 의식적 순목, 음수, 흡연에 의해 안압이 상승하였으며 음주에 의해서는 안압이 감소하였다.

• 한방안이비인후피부과학회지
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• 제31권3호
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• pp.60-66
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• 2018

Objectives : The purpose of this study is to review the chinese published papers on cauterization of traditional chinese medicine. Methods : We searched chinese published papers from 1958 until May 2017 via CNKI(China National Knowledge Infrastructure) with the keyword "cauterization". We analyzed the studies covered cauterization medical treatment, and classified them by 5 categories including periods, type of study, treatment site, experiment target site, and cauterizing method. Results : We reviewed 112 chinese papers which include 10 Original articles, 43 Review articles, and 59 Case reports. Examining yearly distributions, we can see that research on cauterization is becoming more active than in the past. In classification of 93 clinical studies by treatment site, the number of research on Tonsillitis accounts for almost half(43 studies), followed by Sore throat(14 studies). Among 10 experimental studies, Eye is the most frequently targeted organ which was used to study high intra-ocular pressure(5 studies), and retinal ganglion cell(2 studies). Lastly, there are various methods of cauterization used in papers: Branding iron(54 studies), and Red-hot needle(24 studies) are two major heating methods. Conclusions : This analysis shows that studies on the application of cauterization have been actively conducted in China these days. Furthermore, up-to-date cauterizing methods have been developed such as electric type and microwave type beyond traditional ways. We expect this article will encourage further research on cauterization in order to apply it to a variety of diseases. Then, it could become one of new effective medical treatments in Korean medicine.