• 재활복지공학회논문지
• /
• 제9권2호
• /
• pp.169-175
• /
• 2015

자동배설처리기는 현재 배뇨 혹은 배변 장애가 있는 노인들에게 사용되고 있는 기저귀를 대치할 수 있을 것으로 기대되고 있다. 이 장치들은 소변이나 대변을 감지하고, 본체에서 운반된 세정수로 배설기관들을 씻어주고, 이 배설물을 본체의 오물 저장용기에 흡입하여 보관하였다가 버릴 수 있도록 하며, 배설기관 주위를 본체에서 공급하는 온풍으로 건조할 수 있다. 따라서 이 장치들은 간병인의 수고를 경감시키고 환자의 위생을 향상시킬 수 있다. 본 논문에서는 소변과 대변을 감지하는 장치와 자동배설처리기의 주요 구조를 살펴보고 현재 사용되고 있는 자동배설처리 장치들을 기기별 특징에 따라 분류하고자 하였다.

• 센서학회지
• /
• 제9권4호
• /
• pp.256-267
• /
• 2000

본 논문에서는 뇨실금 환자들에 대한 지원 기술의 일환으로 인체에 무해하고 비침습적인 초음파를 이용하여 배뇨시기를 알려주는 뇨의 경보기용 뇨량검출 센서의 개발과 이를 이용한 방광 벽간거리와 뇨량과의 상관관계에 관하여 연구하였다. 개발된 센서의 중심 주파수는 2.25 MHz이며, 이는 인체내로의 침투력이 비교적 좋으면서도 분해능이 높아 오차를 감소시킬 수 있게 설계하였다. 이 센서를 이용하여 방광 전 후벽간의 거리를 검출하여 이로부터 뇨량을 정량적으로 측정하기 위한 기초 실험을 실시하였다. 기초실험은 건강한 성인 남자 3명을 대상으로 초음파 뇨량검출 센서를 이용한 초음파 RF 반사신호 획득장치와 초음파 진단기에 의한 2가지 방법으로 이루어졌고 그 결과 뇨량과 벽간거리와의 사이에는 높은 상관성이 있음을 확인할 수 있었다. 결론적으로, 실험 결과를 토대로 하여 제작된 초음파 뇨량검출용 센서는 뇨실금 환자로 하여금 배뇨시기를 알려주는 뇨의 경보 시스템으로 활용될 수 있으며, 보건 복지적인 측면에서 현대사회에 기여할 공헌도가 매우 클 것이라 생각된다.

• 대한의용생체공학회:의공학회지
• /
• 제23권5호
• /
• pp.397-403
• /
• 2002

뇨당 측정 시스템은 소변 속의 글루코오스 농도를 측정함으로서 당뇨 수치를 모니터링하는 비침습적인 당뇨병 자가 진단 장치이다. 본 논문에서는 기존의 침습형 혈당측정방법의 불편성과 비색계를 이용한 뇨당 검사법의 단점을 보완한 뇨당 측정시스템을 설계하였다. 뇨당 측정시스템은 뇨당 측정용 화학센서, 신호검출부, 디지털 제어 및 신호분석부, 디스플레이부 및 전원부로 구성된다. 뇨당측정용 센서로는 재현성이 뛰어나고 다루기가 간편하며 저렴한 가격으로 대량 생산할 수, 있는 일회용 뇨당측정용 전류화학센서를 개발하였다. 설계한 뇨당 측정시스템의 성능을 평가하기 위하여 사람의 소변에 임의의 농도의 글루코오스 성분을 섞은 용액에 대하여 글루코오스 성분 분석시 사용되는 표준장비와의 비교분석을 통해서 글루코오스 농도 검출에 대한 신뢰성 평가를 수행하였다. 회귀분석에 기초한 신뢰성 평가를 수행한 결과 표준오차는 2.85282로 나타났다. 또한, 화학센서를 사용해서 측정하는 시스템을 평가 시 중요한 파라미터인 S.D(Standard Deviation)는 10%로서 임상적으로 유효한 15% 범주 내에 있음을 확인하였고, C.V(Coefficient of Validation)값은 ,5%이내이므로 혈당센서의 기준으로 평가해 볼때 만족하는 결과를 보였다.

• 한국응용과학기술학회지
• /
• 제35권4호
• /
• pp.1379-1385
• /
• 2018

The hand held voltammetry systems searched diabetic assay using glucose sensor of fluorine nafion doped carbon nanotube electrode (FCNE). An inexpensive graphite carbon pencil was used as an Ag/AgCl reference and Pt counter electrode. Upon combining and using three electrode systems, optimum square wave (SW) stripping results were attained to 1.0-9.0 ug/L with 8 points. Statistic RSD precision was of 6.02 % with n=15 in 0.1 mg/L glucose. After a total of 200 second accumulation times, analytical detection limit of 0.8 ug/L was obtained. This developed technique was applied to urine samples from diabetic patients urine for fluid analysis, it was determined that the sensor can be used with a diagnostics in the ex vivo of live cells and non treated biological fluid.

• Journal of Chest Surgery
• /
• 제19권4호
• /
• pp.563-568
• /
• 1986

Tissue 02 tension is an important guide in detection of the general condition in critical patients. The tissue 0, is more difficult to measure with 0, sensor in skeletal muscle and subcutaneous tissues to present. But it is much easier to measure 0, tension in bladder urine with Censini catheter in Foley catheter than in tissue. We have measured 0, tension in bladder urine, main pulmonary artery and radial artery in 16 patients in chest surgical department of Yonsei University. College of Medicine from September 26 to December 22, 1981. Six patients were male and ten patients were female. Their ages ranged from 8 to 43 years. The correlation equation between the simultaneously measured PuO2 and PvO2 was found to be Ypvo2=4.04 + 0.88 Xpuo2 [r=0.88, p<0.0001] in regression curve with computer [HP/3,000, Program: SPSS] in the Yonsei University. Measurement of 0, tension in bladder urine and MPA will be rather simple, rapid and reproducible method than that of the 0, tension in tissues. But the speed of 0, consumption in urine is fast and so the 0, tensions in bladder urine were measured as soon as possible after they were collected. They were no complications or morbidity during measurement of 0, tension in these procedures except spontaneous removal of radial arterial cannulas in 2 patients.

• 융합보안논문지
• /
• 제13권4호
• /
• pp.27-32
• /
• 2013

본 논문에서는 기저귀에 부착되어 배뇨를 감지한 후 10~20m 이내의 보호자 스마트폰으로 배뇨 발생을 자동으로 알리는 스마트폰형 배뇨알람장치의 구현 기술을 소개한다. 적용된 기술의 특징은 전력 소모 최소화에 있으며 이를 위해 저(低)전력 블루투스 v4.0 기술과 센서 데이터를 수집하지 않는 동안 센서 및 마이크로컨트롤러(micro-controller)를 수면(sleep) 모드로 동작시키는 전력 절감형 프로그램 구동 방식을 적용한다. 배뇨 발생의 정확도를 제고하기 위하여 온/습도 측정 데이터의 절대적인 값을 사용하지 않고 일정 시간 주기로 데이터를 측정하고 이전 값과 현재 값과의 차이를 기반으로 배뇨를 감지하는 방식을 적용한다. 적용 기술을 기반으로 시제품을 구성하고 제품의 성능 시험을 통해 최소 배뇨 검출량 100ml, 검출 정확률 90% 이상, 무선통신 성공률 100%의 성능이 제공됨을 확인한다.

• Journal of Electrochemical Science and Technology
• /
• 제12권2호
• /
• pp.173-187
• /
• 2021

In the present research, a simple electrochemical sensor based on a carbon paste electrode (CPE) modified with ZnO-Zn₂SnO₄-SnO₂ and graphene (ZnO-Zn₂SnO₄-SnO₂/Gr/CPE) was developed for the direct, simultaneous and individual electrochemical measurement of Acetaminophen (AC), Caffeine (Caf) and Ascorbic acid (AA). The synthesized nano-materials were investigated using scanning electron microscopy, X-ray Diffraction, Fourier-transform infrared spectroscopy, and electrochemical impedance spectroscopy techniques. Cyclic voltammetry and differential pulse voltammetry were applied for electrochemical investigation ZnO-Zn₂SnO₄-SnO₂/Gr/CPE, and the impact of scan rate and the concentration of H⁺ on the electrode's responses were investigated. The voltammograms showed a linear relationship between the response of the electrode for individual oxidation of AA, AC and, Caf in the range of 0.021-120, 0.018-85.3, and 0.02-97.51 μM with the detection limit of 8.94, 6.66 and 7.09 nM (S/N = 3), respectively. Also, the amperometric technique was applied for the measuring of the target molecules in the range of 0.013-16, 0.008-12 and, 0.01-14 μM for AA, AC and, Caf with the detection limit of 6.28, 3.64 and 3.85 nM, respectively. Besides, the ZnO-Zn₂SnO₄-SnO₂/Gr/CPE shows an excellent selectivity, stability, repeatability, and reproducibility for the determination of AA, AC and, Caf. Finally, the proposed sensor was successfully used to show the amount of AA, AC and, Caf in urine, blood serum samples with recoveries ranging between 95.8% and 104.06%.

• 대한의용생체공학회:의공학회지
• /
• 제39권4호
• /
• pp.153-160
• /
• 2018

3D ultrasound bladder scanners are getting popular in hospitals for the patients with bladder dysfunction. A current bladder scanner adopts a mechanical scan to acquire 3D images and requires two motors and complicated mechanical devices. In this paper, we propose a new ultrasound bladder scanner using hand-motion scan. Instead of two motors and mechanical devices, it has a motion sensor to record transducer positions during hand-motion scan. The experiments with a bladder phantom and volunteers showed similar measurement accuracy to a conventional 3D ultrasound bladder scanner. We expect that the proposed method will reduce the cost and size of the bladder scanner.

• Journal of Electrochemical Science and Technology
• /
• 제10권4호
• /
• pp.416-423
• /
• 2019

A novel non-enzymatic oxalic acid (OA) sensor based on the platinum/carbon black-nickel-reduced graphene oxide (Pt/CBNi-rGO) nanocomposite is reported. The nanocomposites were prepared by the ethylene glycol reduction method. Their morphology and chemical composition were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and transmission electron microscopy (TEM). The results clearly demonstrated the formation of the Pt/CB-Ni-rGO nanocomposite. The electrocatalytic activity of the Pt/CB-Ni-rGO electrode was investigated by cyclic voltammetry. It was determined that the appropriate amount of Pt enhanced the catalytic activity of Pt for oxalic acid electro-oxidation. Moreover, the modified electrode was determined to be highly selective for oxalic acid without interference from compounds commonly found in urine including uric acid and ascorbic acid. The chronoamperometric signal gave a wide linearity range of 20 μM-60 mM and the detection limit (3σ) was found to be 2.35 μM. The proposed method showed high selectivity, stability, and good reproducibility and could be used with micro-volumes of sample for the detection of oxalic acid. Finally, the oxalic acid content in artificial and control urine samples were successfully determined by our proposed electrode.

• Asian Pacific Journal of Cancer Prevention
• /
• 제15권11호
• /
• pp.4377-4384
• /
• 2014

According to the World Health Organization (WHO), 1.37 million people died of lung cancer all around the world in 2008, occupying the first place in all cancer-related deaths. However, this number might be decreased if patients were detected earlier and treated appropriately. Unfortunately, traditional imaging techniques are not sufficiently satisfactory for early detection of lung cancer because of limitations. As one alternative, breath volatile organic compounds (VOCs) may reflect the biochemical status of the body and provide clues to some diseases including lung cancer at early stage. Early detection of lung cancer based on breath analysis is becoming more and more valued because it is non-invasive, sensitive, inexpensive and simple. In this review article, we analyze the limitations of traditional imaging techniques in the early detection of lung cancer, illustrate possible mechanisms of the production of VOCs in cancerous cells, present evidence that supports the detection of such disease using breath analysis, and summarize the advances in the study of E-noses based on gas sensitive sensors. In conclusion, the analysis of breath VOCs is a better choice for the early detection of lung cancer compared to imaging techniques. We recommend a more comprehensive technique that integrates the analysis of VOCs and non-VOCs in breath. In addition, VOCs in urine may also be a trend in research on the early detection of lung cancer.