• Korean Journal of Radiology
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• 제22권4호
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• pp.568-576
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• 2021

Arteriovenous malformations (AVMs) are direct communications between primitive reticular networks of dysplastic vessels that have failed to mature into capillary vessels. Based on angiographic findings, peripheral AVMs can be classified into six types: type I, type IIa, type IIb, type IIc, type IIIa, and type IIIb. Treatment strategies vary with the types. Type I is treated by embolizing the fistula between the artery and the vein with coils. Type II (IIa, IIb, and IIc) AVM is treated as follows: first, reduce the blood flow velocity in the venous segment of the AVM with coils; second, perform ethanol embolotherapy of the residual shunts. Type IIIa is treated by transarterial catheterization of the feeding arteries and injection of diluted ethanol. Type IIIb is treated by transarterial or direct puncture approaches. A high concentration of ethanol is injected through the transarterial catheter or direct puncture needle. When the fistula is large, coil insertion is required to reduce the amount of ethanol. Type I and type II AVMs showed the best clinical results; type IIIb showed a satisfactory response rate. However, type IIIa showed the poorest response rate, either alone or in combination with other types. Clinical success can be achieved by using different treatment strategies for different angiographic AVM types.

• Korean Journal of Radiology
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• 제20권1호
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• pp.166-170
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• 2019

Objective: To establish a cost-effective and easily available phantom for training residents in ultrasound-guided fine needle thyroid nodule targeting punctures. Materials and Methods: Tofu, drinking straws filled with coupling gel, a urine tube, and 21-gauge needles were used to generate a phantom thyroid with nodules for training. Twelve radiology residents were involved in the study. The puncture success rates were recorded and compared before and after phantom training using the Wilcoxon signed-rank test. Results: On ultrasonography, tofu mimicked the texture of the thyroid. Drinking straws filled with coupling gel mimicked vessels. The urine tube filled with air mimicked the trachea, and 21-gauge needles mimicked small nodules in the transverse section. The entire phantom was similar to the structure of the thyroid and surrounding tissues. The puncture success rates of radiology residents were significantly increased from 34.4 ± 14.2% to 66.7 ± 19.5% after training (p = 0.003). The phantom was constructed in approximately 10 minutes and materials cost less than CNY 10 (approximately $ 1.5) at a local store. Conclusion: The tofu model was cost-effective, easily attainable, and effective for training residents in ultrasound-guided fine needle thyroid nodule targeting punctures in vitro.

• The Korean Journal of Pain
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• 제28권2호
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• pp.109-115
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• 2015

Background: This study sought to determine safe ranges of oblique angle, skin entry point and needle length by reviewing computed tomography (CT) scans and to evaluate the usefulness of a bent tip needle during celiac plexus block (CPB). Methods: CT scans of 60 CPB patients were reviewed. Image of the uppermost margin of L2 vertebral body was used to measure the minimal and maximal oblique angles and the distances from the midline to skin puncture point. The imaginary needle trajectory distance was calculated by three-dimensional measurement. When the procedure was performed by using a $10^{\circ}$ bent tip needle under a $20^{\circ}$ oblique X-ray fluoroscopic view, the distance (GF/G'F) from the midline to the actual puncture site was measured. Results: The imaginary safe oblique angle range was $26.4-34.2^{\circ}$ and $27.7-36.0^{\circ}$ on the right and left, respectively. The distance from the midline to skin puncture point was 6.1-7.6 cm on the right and 6.3-7.6 cm on the left. The needle trajectory distance at minimal angle was 9.6-11.6 cm on the right and 9.5-11.5 cm on the left. The distance of GF/G'F was 5.1-6.5 cm and 5.0-6.4 cm on the right and left, respectively. All imaginary parameters were correlated with BMI except for GF/G'F. All complications were mild and transient. Conclusions: We identified safe values of angles and distances using a straight needle. Furthermore, using a bent tip needle under a $20^{\circ}$ oblique fluoroscopic view, we could safely perform CPB with smaller parameter values.

• Applied Biological Chemistry
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• 제46권2호
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• pp.113-116
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• 2003

수용성 키토산 필름 용액에 분리 대두단백질(SPI)과 $CaCl_2$ 첨가가 키토산 필름의 물성에 미치는 영향을 알아보기 위해 이들을 첨가하여 제조한 필름의 색도, puncture strength, 인장강도와 신장률, 수증기투과도를 측정하였다. 필름의 puncture strength는 0.15% $CaCl_2$를 첨가하여 제조한 키토산 필름이 $458.8\;g_f$로 대조구의 $174.5\;g_f$보다 약 2.5배 증가된 가장 높은 값을 나타냈다. 인장강도의 경우 대조구가 0.06 MPa인 반면에 0.05% $CaCl_2$를 첨가한 키토산 필름은 1.58 MPa로 가장 높은 값을 보였고 SPI를 2.5% 첨가한 필름은 0.73 MPa로 나타났다. 필름의 신장률은 대조구가 12.25%인 반면 0.15% $CaCl_2$를 첨가한 필름은 44.80%로 $CaCl_2$의 양이 증가함에 따라 커지는 경향을 보였으며, 수증기투과도는 $CaCl_2$를 첨가한 필름이 SPI를 첨가한 필름보다 더 낮은 값을 보였다.

• Journal of Radiation Protection and Research
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• 제32권1호
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• pp.35-44
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• 2007

밀봉선원은 과학기술부고시에 의거하여 사용용도별로 등급에 따라 해당 성능시험을 수행하고, 각 성능시험을 거친 후 해당 방사성핵종의 방사능 누설량이 200베크렐을 초과하지 아니하여야 한다. 이러한 성능시험은 온도시험, 의부압력시험, 충격시험, 진동시험 및 관통시험으로 구성되어 있으며 등급에 따라서 각 성능시험의 조건이 각각 다르다. 본 연구에서는 진동시험을 제외한 성능시험을 위한 장치를 개발하고 이를 세 가지 종류의 밀봉선원의 성능시험에 적용하였다. 의료용 근접치료기에 사용되는 근접치료기용 선원은 5등급의 온도시험, 3등급의 외압시험, 2등급의 충격시험을 수행하여 'C53211' 등급의 기준에 적합함을 보였다. 산업용 조사기에 사용되는 $^{75}Se$ 및 $^{169}Yb$ 선원에 대하여 4등급의 온도시험, 3등급의 외압시험, 5등급의 충격시험과 관통시험을 실시하여 'C43515' 등급의 기준에 적합함을 입증하였다.

• 대한수의사회지
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• 제14권4호
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• pp.227-231
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• 1978

The results obtained by acupuncture on the unknown canine paresis were as follow; 1. Operator could feel special sense in case of hitting the meridian points and could tell the success or failure of the puncture. 2. Even puncturing the sane meridian point

• Journal of Chest Surgery
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• 제26권4호
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• pp.316-319
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• 1993

Although Behcet`s disease, characterized by oro-genital ulceration and ocular abnormalities, is rare and unfamiliar disease to thoracic surgeon, one must remember that it can cause serious complications on the vascular system such as thrombophlebitis,thrombotic obstuction and aneurysm.We report a case of multiple arterial aneurysms with Behcet`s disease. This 31 year-old female had five times surgical interventions during short period[19 months]. 6 aneurysms were developed in this case, 3 were spontaneous aneurysms, 2 were anastomotic aneurysms and 1 was false aneurysm due to arterial puncture.

• 대한약학회:학술대회논문집
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• 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2
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• pp.229-229
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• 2002

Although hepatocellular dysfunction occurs during sepsis. the mechanism responsible for this remains unclear. Since Kupffer cells provide signals that regulate hepatic response in endotoxin and inflammation. the aim of this study was to investigate the role of Kupffer cells in the alterations in the hepatic microsomal drug metabolizing function during sepsis. Rats were subjected to polymicrobial sepsis by cecal ligation and puncture (CLP)followed by fluid resuscitation. (omitted)

• Journal of applied mathematics & informatics
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• 제30권5_6호
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• pp.821-827
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• 2012

In this paper, we prove that for all odd prime powers $q$ there exist MDS(maximum distance separable) self-dual codes over $\mathbb{F}_{q^2}$ for all even lengths up to $q+1$. Additionally, we prove that there exist MDS self-dual codes of length four over $\mathbb{F}_q$ for all $q$ > 2, $q{\neq}5$.

• 한국표면공학회지
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• 제28권4호
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• pp.236-242
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• 1995

This paper describes a study of electrical tree growth in DGEBA/MDA/SN system subjected to ac high electric field. The dielectric breakdown process, which consists of tree initiation, tree propagation and the complete puncture of the system was investigated. Dielectric breakdown always initiated from the needle tip where the electric field reinforcement is the highest. Higher temperature and voltage accelerated the tree growth and reduced the time to breakdown.