• Childhood Kidney Diseases
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• 제2권1호
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• pp.1-8
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• 1998

목적 : 급성 발열 환아에서 요로감염의 조기 진단과 신속한 치료는 신손상을 예방한다는 점에서 매우 중요하다. 최근 개발된 dipstick 요분석($Multistix^{(R)}$)은 간편 신속하고 저렴하여 성인 요로감염의 선별검사로서 가치가 있을 뿐만 아니라 음성 검사시에는 보다 시간이 걸리고 비용이 드는 현미경적 요분석이나 요배양 검사를 대치할 수 있다고 하였으나 소아에서는 연령과 증상 유무에따라 상반괸 결과가 보고되어 있다. 이에 저자들은 발열을 보인 영유아에서 요로감염의 신속한 선별검사로 dipstick 요분석의 진단적 가치를 평가하고자 한다. 방법 : 1994년 10월부터 1996년 2월까지 이화여자대학 부속병원 소아과에 발열을 주소로 입원한 영유아 685명(남 392명, 여 293명)을 대상으로 하였다. 방광 천자나 2회의 중간뇨 배양검사에 의해 요로감염으로 확진된 80명(11.6%)과 타 질환으로 판명된 605명 (88.4%)에서 dipstick 요분석 ($Multistix^{(R)}$)의 leukocyte esterase(LE), nitrite 검사를 현미경적 요분석(백혈구, 세균)및 요배양 검사와 비교하였다. 결과 : 1) Dipstick 요분석상 요로감염 환아에서의 LE 양성율은 38.7% (31/80), nitrite 양성율은 13.8% (11/80)로 낮았고 비요로감염 환아에서도 LE 양성율 2.1% (31/605), nitrite 양성율 1.2% (7/605)가 관찰되었다. 2) 현미경적 요분석상 요로감염 환아에서의 백혈구 양성율은 31.2% (25/80), 세균 양성율은 17.5% (14/80)로 낮았고 비요로감염 환아에서도 백혈구 양성율이 4.1% (25/605) 세균 양성율이 0.6% (4/605)가 관찰되었다. 3) Dipstick 요분석의 LE 검사 양성율 38.7%는 현미경적 요분석의 백혈구 양성율 31.2%보다 유의하게 높았고 (P<0.05), dipstick 요분석의 nitrite 검사 양성율 13.8%는 현미경적 요분석의 세균 양성율 17.5%와 유의한 차이가 없었다(P>0.05). 4) Dipstick 요분석은 민감도 43.7%, 특이도 98.3%, 양성 예측치 63.6%, 음성 예측치 92.9%로 현미경적 요분석의 40.0%, 99.0%, 54.0%, 92.3%, 60.0%, 4.5%와 유의한 차이가 없었다 (P>0.05). 두 검사를 상호보완 하더라도 민감도는 50.0%로 여전히 낮았다. 5) Dipstick 요분석에서 음성이나 현미경적 요분석에 양성인 경우는 5례로 현미곁적 요분석에 의하여 6.3% (5/80)에서 추가 진단되었다. 결론 : 급성 발열을 보이는 영유아에서 요로 감염의 선별 검사로서 dipstick 요분석의 민감도는 낮았고 현미경적 요분석으로 보완하여 약간 상승하였다. 그러나 상호 보완 하여도 민감도는 여전히 낮기 때문에 두 검사가 음성이어도 요배양 검사는 필수적이어야 한다.

• Childhood Kidney Diseases
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• 제17권2호
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• pp.42-48
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• 2013

소변검사는 신장질환과 기타전신질환의 진단에 매우 중요한 검사이다. 요시험지봉검사을 이용하면 짧은 시간에 소변의 여러 가지 화학 성상(pH, 비중, 단백, 당, 케톤체, 잠혈, 빌리루빈, 우로빌리노겐, 아질산염, 백혈구-에스테라제)을 동시에 검사할 수 있다. 요시험지봉검사는 관련된 화학반응이 복잡하여 소변에 존재하는 산화물질, 환원물질, 착색물질의 영향을 받을 수 있어 위양성 위음성 반응이 흔히 발생한다. 요시험지봉검사로 신뢰할 수 있는 결과를 얻기 위해서는 검체를 깨끗하게 채집하고 주의를 기울여 검사해야 하며 요시험지봉검사 결과를 제대로 이용하기 위해서는 검사의 원리를 잘 이해할 필요가 있다. 요시험지봉검사에서 혈뇨, 단백뇨, 요로감염이 의심되면 확진을 위해 요검경검사를 실시하여야 한다.

• Food Science and Biotechnology
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• 제15권6호
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• pp.990-992
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• 2006

In a previous study, we obtained polyclonal antibodies against the organophosphorus insecticide fenitrothion and developed an enzyme-linked immunosorbent assay (ELISA) for this pesticide. Using these antibodies and an enzyme tracer, a direct competitive ELISA method specific for fenitrothion using a dipstick format was developed. Dipstick ELISA using antibodies to fenitrothion immobilized on an Immunodyne membrane allowed the quick visual detection of fenitrothion at concentrations above $10\;{\mu}g/L$. The $IC_{50}$ value of dipstick ELISA using reflectance detection was $27\;{\mu}g/L$ with a detection limit of $2\;{\mu}g/L$. The recovery of fenitrothion from spiked lettuce and rice samples using the dipstick ELISA ranged from 87-107%.

• Parasites, Hosts and Diseases
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• 제51권1호
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• pp.93-98
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• 2013

A field applicable diagnostic technique, the dipstick assay, was evaluated for its sensitivity and specificity in diagnosing human Schistosoma mansoni infection. A monoclonal antibody (mAb) against S. mansoni adult worm tegumental antigen (AWTA) was employed in dipstick and sandwich ELISA for detection of circulating schistosome antigen (CSA) in both serum and urine samples. Based on clinical and parasitological examinations, 60 S. mansoni-infected patients, 30 patients infected with parasites other than schistosomiasis, and 30 uninfected healthy individuals were selected. The sensitivity and specificity of dipstick assay in urine samples were 86.7% and 90.0%, respectively, compared to 90.0% sensitivity and 91.7% specificity of sandwich ELISA. In serum samples, the sensitivity and specificity were 88.3% and 91.7% for dipstick assay vs. 91.7% and 95.0% for sandwich ELISA, respectively. The diagnostic efficacy of dipstick assay in urine and serum samples was 88.3% and 90.0%, while it was 90.8% and 93.3% for sandwich ELISA, respectively. The diagnostic indices of dipstick assay and ELISA either in serum or in urine were statistically comparable (P>0.05). In conclusion, the dipstick assay offers an alternative simple, rapid, non-invasive technique in detecting CSA or complement to stool examinations especially in field studies.

• International Journal of Industrial Entomology and Biomaterials
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• 제6권1호
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• pp.27-31
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• 2003

Infectious flacherie of silkworm Bombyx mori is caused by B. mori infectious flacherie virus (BmIFV) and causes severe crop loss to sericulturists. In the present study, a colloidal textile dye-based dipstick immunoassay is developed for the detection of infectious flacherie in silkworms. Colloidal textile dye (blue D2R) with Aλ$_{max}$ at 620 nm was sensitised with 500 $\mu\textrm{g}$/ml of purified anti-BmIFV IgG. The dye-antibody reagent detects purified antigen up to 10 ng/ml and BmIFV infection in diseased larval extracts $(up to a dilution of {10^-5})$ and faecal matter extracts $(up to a dilution of {10^-2})$ by forming clear blue dot within 30 min. It was observed to be stable for three months period at $4^{\circ}C$. The efficacy of textile dye-based dipstick immunoassay was on pay with HRP-based dipstick immunoassay and fluorescent antibody test, and better than latex agglutination and ouchterlony tests in the detection of BmIFV The dye-based dipstick immunoassay method provides a simple, sensitive and less expensive test for the detection of BmIFV infection in silkworms.s.

• Journal of Preventive Medicine and Public Health
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• 제40권4호
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• pp.297-304
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• 2007

Objectives : We investigated the validity of the dipstick method (Mossman Associates Inc. USA) and the expired CO method to distinguish between smokers and non-smokers. We also elucidated the related factors of the two methods. Methods : This study included 244 smokers and 50 ex-smokers, recruited from smoking cessation clinics at 4 local public health centers, who had quit for over 4 weeks. We calculated the sensitivity, specificity and Kappa coefficient of each method for validity. We obtained ROC curve, predictive value and agreement to determine the cutoff of expired air CO method. Finally, we elucidated the related factors and compared their effect powers using the standardized regression coefficient. Results : The dipstick method showed a sensitivity of 92.6%, specificity of 96.0% and Kappa coefficient of 0.79. The best cutoff value to distinguish smokers was 5-6ppm. At 5 ppm, the expired CO method showed a sensitivity of 94.3%, specificity of 82.0% and Kappa coefficient of 0.73. And at 6 ppm, sensitivity, specificity and Kappa coefficient were 88.5%, 86.0% and 0.64, respectively. Therefore, the dipstick method had higher sensitivity and specificity than the expired CO method. The dipstick and expired CO methods were significantly increased with increasing smoking amount. With longer time since the last smoking, expired CO showed a rapid decrease after 4 hours, whereas the dipstick method showed relatively stable levels for more than 4 hours. Conclusions : The dipstick and expired CO methods were both good indicators for assessing smoking status. However, the former showed higher sensitivity and specificity and stable levels over longer hours after smoking, compared to the expired CO method.

• Tribology and Lubricants
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• 제29권2호
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• pp.77-84
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• 2013

A small engine-oil-deterioration detection sensor was developed and installed at the tip of a dipstick gage. The sensor part was manufactured using printed circuit board (PCB) manufacturing technology. A set of sensor covers was installed in order to protect the sensor and realize good signal stability. The small engine-oil-deterioration detection sensor system comprised a dual sensor having etched copper electrodes coated with gold and ceramic, a flexible PCB (FPCB) acting as electric wire, and a dummy PCB with only a lock connector. The sensor can easily be installed by insertion through the guide tube of a dipstick gage. Thus, a driver can easily handle it without further installation equipment. The sensor can determine the level of deterioration in the engine oil by estimating the corresponding dielectric constant of the engine oil.

• Journal of Biosystems Engineering
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• 제33권5호
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• pp.340-347
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• 2008

Dipstick urinalysis is used as a routine test for a screening test of UTI (urinary tract infection) in primary practice because urine dipstick test is simple. The result of dipstick urinalysis brings medical professionals to make a microscopic examination and urine culture for exact UTI diagnosis, therefore it is emphasized on a role of screening test. The objective of this study was to the classification between UTI patients and normal subjects using hybrid neural network classifier with enhanced clustering performance in urine dipstick screening test. In order to propose a classifier, we made a hybrid neural network which combines with RBF layer, summation & normalization layer and L VQ artificial neural network layer. For the demonstration of proposed hybrid neural network, we compared proposed classifier with various artificial neural networks such as back-propagation, RBFNN and PNN method. As a result, classification performance of proposed classifier was able to classify 95.81% of the normal subjects and 83.87% of the UTI patients, total average 90.72% according to validation dataset. The proposed classifier confirms better performance than other classifiers. Therefore the application of such a proposed classifier expect to utilize telemedicine to classify between UTI patients and normal subjects in the future.

• Journal of Yeungnam Medical Science
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• 제1권1호
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• pp.115-120
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• 1984

1983년 5월 1일부터 1984년 10월 31일까지 1년 6개월간 영남대학 부속병원 소아과에 입원하여 "dipstick" 뇨검사를 실시한 대상 환아 844례에서 단백뇨 4.9%, 혈뇨 2.4%, 당뇨 1.1%, 케톤뇨 9.5%로 142례에서 이상 소견이 나타났다. "Dipstik" 검사의 이상 소견 발현율은 성별, 연령별, 발열 유무와는 유의한 차이를 볼 수 없었다. 중등도 이산의 탈수 증세를 나타낸 환아들은 21.2% 에서 단백뇨를, 그리고 31.8%에서 케톤뇨를 나타내어 탈수증세가 없는 환아들의 1.8% 및 1.0% 보다 유의하게 높은 양성율을 나타냈다(p<0.05). 탈수증세의 정도와 케톤뇨의 양성도는 유의한 관계를 보였다(p<0.005). 케톤뇨 양성 환아 97례 중 93.8%가 탈수증을, 54.6%가 위장관염을, 51.5%가 발열을, 그리고 29.9%가 호흡기 질환을 동반하였다. 단백뇨와 케톤뇨가 양성이었던 경우 반복검사에서 모두 음성으로 되었다. "Dipstick" 검사에서 혈뇨를 나타낸 13례 중 반복 검사에서 9례는 음성으로 나타났으며 4례는 계속 양성으로 냐타나 확진검사에서 만성 신우신염 2례, 무증상 뇨로감염증 1례, 양성 반복성 혈뇨 1례로 새로 진단되었다. "Dipstick" 선별검사는 비용이 적게 들며 간단한 검사로 입원 당시에 예상되지 않았던 신뇨로 질환을 찾아 내는데 도움이 되는 것으로 나타났다.

• Journal of Preventive Medicine and Public Health
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• 제39권5호
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• pp.427-432
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• 2006

Objectives: This study was to investigate if the dipstick proteinuria can predict cardiovascular mortality in a population of Korean men. Methods: We measured urine protein and other cardiovascular risk factors in 100059 Korean men, aged between 35-59 years in 1990 and 1992. Levels of proteinuria measured by dipstick method were trace or less, 1+, 2+, and 3+ or greater. The primary outcomes were deaths from all causes, cardiovascular disease, cancer, and others in a 12 year follow-up from 1993 to 2004. Results: The multivariate-adjusted relative risks (95% CI) for cardiovascular death according to the level of proteinuria (1+, 2+, 3+ and more) in 1990 examination were 2.18 (1.36-3.48), 2.55 (1.37-4.78), and 4.57 (2.16-9.66) respectively. The corresponding relative risks according to the level of proteinuria in 1992 examination were 2.49 (1.71-3.64), 2.64 (1.53-4.58), and 2.78 (1.15-6.73). The relative risks for cardiovascular death of men with proteinuria (1+ or greater) once and twice among the examinations were 2.18 (1.63-2.92) and 3.75 (2.27-6.18), compared with men without proteinuria in 1990 and 1992 examinations. Conclusions: Our results showed that dipstick proteinuria is associated with cardiovascular mortality in Korean men. Dipstick proteinuria could be a predictor for cardiovascular mortality.