• Proceedings of the Korean Society of Computer Information Conference
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• 2021.07a
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• pp.355-357
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• 2021

환자들은 병원을 방문하면 정확한 진단 정보를 얻기 위하여 채혈한다. 이때 채혈은 주로 임상병리사가 시행하는데 채혈 시 실수가 발생하면 감염으로부터 위험해질 수 있다. 따라서 채혈에 따른 주삿바늘로부터의 감염을 예방하고 환자와 임상병리사의 안전을 위한 올인원 채혈기를 고안했다. 올인원 채혈기는 가장 굵은 정맥혈관을 찾기 위해 'AccuVein'의 기능을 이용했다. 이에 본 올인원 채혈기는 자동화 채혈 장비로써 혈관 판독부터 시작하여 혈액 튜브에 혈액을 담는 과정까지 설계되어있다. 올인원 채혈기를 사용하면 자동화 기구로 채혈하기 때문에 임상병리사가 주삿바늘에 직접 노출되는 경우가 줄어들어 감염을 예방할 수 있고, 채혈기 내에서 정맥을 식별해 정확한 채혈을 진행할 수 있다. 또한, 채혈 시간의 감축으로 인해 환자의 대기시간을 감소시킬 수 있다.

• Proceedings of the KAIS Fall Conference
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• 2010.11b
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• pp.820-823
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• 2010

본 연구는 채혈바늘에 의해 발생하는 2차 감염을 방지하기 위한 안전 랜싯(Lancet)을 설계 개발하고 연속하여 채혈하는 경우에 쉽게 그리고 편리하게 사용할 수 있도록 무선 전동방식의 채혈기를 설계제작을 목적으로 한다. 안전랜싯은 채혈침과 보호캡이 일체형으로 설계되어 채혈 순간을 제외하고는 채혈침이 항상 보호캡 속에 있도록 하여 채혈바늘에 의한 사고를 방지하도록 하였다. 전동 채혈기는 충전건전지를 전원으로 하고 솔레노이드의 작동으로 랜싯을 타격하여 채혈하도록 설계되었으며, 연발 타격 또는 단발타격의 기능을 선택하도록 설계 제작되었다. 이 채혈기는 한방병의원의 사혈기로도 사용되도록 제작되었다.

• Journal of Biomedical Engineering Research
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• v.25 no.6
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• pp.557-563
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• 2004

A new vacuum assisted auto-lancing technique is proposed to minimize pain. Specially designed lancing device was introduced, which applied -100mmHg right after skin puncture on the forearm. Sampled blood volumes were measured in 58 normal females. Mean volume of 464 samples was approximately 2.6$\muL$ and the frequency of more than 0.5$\muL$ was 86%. Thus the success rate of blood sugar test should also be the same when using modern glucose meters capable of testing with only 0.3~0.5$\muL$ of capillary blood. When pain scores were quantitatively evaluated by the visual pain measure, only 23% pain of the traditional finger sampling was experienced, demonstrating that capillary blood sampling was performed on the forearm with almost no pain. The present technique reduced pain to a great degree, though resampling might be unavoidable due to 14% of test failure rate estimated for modern glucose meters. However, minimized pain makes the present technique of great convenience for diabetic patients who need blood sampling a few times a day.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.12
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• pp.5464-5468
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• 2011

This paper deals with the development of the safety lancet and the electric lancing device. The safety lancet, in which a needle and a protective cap become one body, is designed. It is to prevent the secondary contamination by needlestick injury because the needle is always in the protective cap except for a moment of blood-gathering. The electric lancing device powered by batteries is devised to be operated by the moving rod of solenoid hitting the lancet. and to be used after selecting the repeat or the single hitting mode. The impact force by a hitting rod, the expected life of battery and etc. are measured for product development. This lancing device can be also used for the bloodletting device of the oriental medicine.

• Korean Journal of Clinical Laboratory Science
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• v.51 no.4
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• pp.495-503
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• 2019

This study explored the method of determining the appropriate size of the workforce according to the assessment of the workload of medical technologists (also called medical and clinical laboratory technologists, and medical and clinical laboratory scientists) in order to present a standard production model for the appropriate manpower in blood collection rooms. The eleven university hospitals selected for this study had between 600 and 2,000 beds. The 14-steps standard blood collection time was 4 minutes and 8 seconds for the outpatients aged between 20 to 60 years old (57%) except for children and the elderly (43%). Assuming that there were 8 hours per day for mechanically collecting blood, the maximum number of blood donations by one clinical laboratory scientist was analyzed to be 100 cases. In conclusion, it is appropriate to have fewer than 100 cases of daily blood collection by a medical technologist engaged in blood collection. Since the proper number of blood collection workers (100% of blood collection work)=the number of annual working days/(one day's work hours/time per case)×the number of working days per year, then the proper number of blood collection workers (one day's work hours)=the number of working days per year/100×the number of working days).

• Journal of the Korean Society of Radiology
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• v.84 no.2
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• pp.386-397
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• 2023

Primary aldosteronism (PA) is a curable cause of hypertension. Recent studies have revealed that the actual prevalence of PA is higher than previously recognized. Adrenal vein sampling (AVS) is an essential diagnostic procedure for revealing the cause of PA and determining the treatment plan. The success of AVS is confirmed by comparing cortisol levels between the samples from each adrenal vein and peripheral vein. The failure rate of the procedure is reported to be high in the right adrenal vein, which is directly connected to the inferior vena cava, while that in the left adrenal vein is relatively low; however, this has rarely been reported. In this review, we introduce and analyze cases of failure in left adrenal vein sampling.

• Nuclear Medicine and Molecular Imaging
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• v.40 no.1
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• pp.33-39
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• 2006

Purpose: To determine appropriate sampling frequency and time of multiple blood sampling dual exponential method with $^{99m}Tc$-DTPA for calculating glomerular filtration rate (GFR). Materials & Methods: Thirty four patients were included in this study. Three mCi of $^{99m}Tc$-DTPA was intravenously injected and blood sampling at 9 different times, 5ml each, were done. Using the radioactivity of serum, measured by gamma counter, the GFR was calculated using dual exponential method and corrected with the body surface area. Using spontaneously chosen 2 data points of serum radioactivity, 15 collections of 2-sample GFR were calculated. And 10 collections of 3-sample GFR and 12 collections of 4-sample GFR were also calculated. Using the 9-sample GFR as a reference value, degree of agreement was analyzed with Kendall's $\tau$ correlation coefficients, mean difference and standard deviation. Results: Although some of the 2-sample GFR showed high correlation coefficient, over or underestimation had evolved as the renal function change. The 10-120-240 min 3-sample GFR showed a high correlation coefficient (${\tau}=0.93$), minimal difference ($Mean{\pm}SD=-1.784{\pm}3.972$), and no over or underestimation as the renal function changed. The 4-sample GFR showed no better accuracy than the 3-sample GFR. Conclusions: In the wide spectrum of renal function, the 10-120-240 min 3-sample GFC could be the best choice for estimating the patients' renal function.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.9
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• pp.2451-2459
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• 2009

The present study aimed to evaluate the accuracy of the blood glucose test with almost painless vacuum assisted auto-lancing technique. The blood glucose concentration measurements in the capillary blood sampled from the alternative (forearm) site were compared with the standard venous or finger sampling techniques. Capillary blood was sampled from both the left index finger and the forearm, followed by the venous blood sampling in 531 patients who visited the C University Hospital. Blood sugar test was performed for each blood samples for comparative analysis. Mean blood glucose concentration measured on the forearm was closer to the venous glucose level than that of the finger, but the difference was approximately 10 mg/dL small enough to ignore from the clinical point of view. The correlation coefficients of the measured blood glucose levels between finger and vein and between forearm and vein were 0.94 and 0.92, respectively (p<0.001). The blood glucose measurement on the forearm also well correlated with the finger, showing a correlation coefficient of 0.94, and both data were very much close to each other. Therefore, the blood sugar test on the alternative capillary blood sampling site such as forearm was accurate enough for clinical practice. The vacuum assisted auto-lancing technique on the alternative site would be of particular interest for the disease management of the chronic diabetes, since it induces almost no pain when sampling blood from the capillaries.

• The Korean Journal of Blood Transfusion
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• v.23 no.2
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• pp.145-151
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• 2012

배경: 채혈 후 제제 경과시간에 따른 동결혈장의 혈액응고인자의 활성도와 이에 영향을 미치는 요인을 분석하여, 혈액응고인자제제의 원료혈장의 사용범위를 확장 가능한지 확인하고자 동결혈장의 채혈시간과 응고인자 특성을 측정하였다. 방법: ALT 부적격 혈장을 채혈 후 동결시간의 특성에 따라 4단계로 구분하였고, 6종류의 혈액 응고인자 활성도와 혈액형을 검사하였고, SAS 9.2 프로그램을 사용하여 통계처리 하였다. 결과: 혈액제제간 FVIII 활성도를 분석한 결과 PL-A>FFP>FP(8-24)${\approx}$FP(24-72) 순으로 유의하게 낮아졌고 혈액형에 따라서는 AB형이 제일 높고, O형이 제일 낮았다. 대한적십자사의 원료혈장에 대한 FVIII 활성 품질기준을 적용할 경우 PL-A, FFP와 FP24는 각각 85.0%와 82.5%로 적합하였다. 캐나다 퀘백 주처럼 FP24의 FVIII 활성이 0.52 IU/mL 이상을 적용할 경우 PL-A, FFP와 FP24는 각각 95.0%, 96.3%, 82.6%로 적합하였다. 또한 FP(8-24)의 A형과 AB형, FP(24-72)의 경우 AB형이 각각 82.1%, 83.3%, 100%로 적합하였다. 결론: 혈액응고인자제제용 원료혈장의 범위는 외국의 기준에 비추어 채혈 후 24시간 내에 동결된 혈장(FP24)으로 확대 사용이 가능하다. 이를 위해서는 채혈 후 동결시간과 혈액응고인자에 대한 품질기준을 유럽약전 또는 WHO 가이드라인과 비교하여 완화하는 것이 필요하다.

• Korean Journal of Clinical Laboratory Science
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• v.55 no.3
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• pp.159-166
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• 2023

This study investigates the current situation of medical technologists for blood collection, which is considered the most important step for diagnosis. The survey enrolled 650 medical technologists working in hospitals and medical check centers in Busan, Ulsan, and Gyeongnam. We found that each medical technologist performed blood collection for about 100 patients. There was more than one blood collection failure per day, with more than one case of pain and filing of civil complaints per year. Hence, there was a high work burden on the medical technologists. Cases where a medical technologist was stabbed with a used needle occurred more than once a year, and about 15% of them received infection control and treatment because of stab wounds. Additionally, more than half of the participants suffered from musculoskeletal disorders and mental stress due to blood collection work. Unlike administering intravenous and intramuscular injections using the same needle, no fee is charged for blood collection. Based on the results of this study, it will be possible to improve the safety and rights of medical technologists by calculating the actual fee for blood collection work and assigning a relative value score.