• Journal of Dental Anesthesia and Pain Medicine
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• 제21권2호
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• pp.139-153
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• 2021

Background: In anesthetic techniques, touching bones can cause needle bending. Theoretically, a needle should support such deflection without fracturing. However, it is possible that a needle may fracture depending on the quality and type of needle used. This study evaluated the physical, chemical, and micromorphological characteristics of long and short dental anesthetic needles, as well as the mechanical properties of flexural load and bending resistance when needles are subjected to different bending angles. Methods: Long and short needles (30G, Jets, Misawa, Selekto, Terumo, Unoject and 27G, Dencojet, Injex, Jets, Misawa, Procare, Setoject XL, Terumo) were evaluated. Scanning electron microscopy was used to evaluate the needle bevels and energy-dispersive X-ray spectroscopy was used for the chemical analysis of needle compositions. Flexural loading and bending strength assessments were performed using a universal testing machine by bending the needles (n = 5) to angles of 30°, 60°, or 90°, or until fracture occurred. Results: The Injex 27G, Jets 27G, and Septoject XL 27G needles were all less than 30 mm in length. There were small percentage variations in the chemical compositions of the needles. Superior smoothness was observed for the Unoject 30G needle, which exhibited the highest fracture resistance at 60°. The Jets 30G needle exhibited greater resistance to fractures at 90°. The Procare 27G needle exhibited the highest load resistance to bending, followed by the Septoject XL 27G needle, and both needles were tied for the lowest fracture resistance. No needle fractured when bent to 30° or at less than three bends to 60° or 90°. Conclusions: Greater needle resistance to bending increases the probability of early fracturing. Thinner and shorter needles are more resistant than longer and thicker needles. Performing a single bend does not result in any significant risk of fracture or obliterate the lumen, allowing for the continued passage of anesthetic liquid.

• Journal of Yeungnam Medical Science
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• 제39권1호
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• pp.18-23
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• 2022

Background: This study was performed to evaluate periprocedural factors, complications, and repuncture rate of the newly developed puncture needle and compare it with the routinely used puncture needle for ultrasound (US)-guided paracentesis. Methods: We retrospectively identified 137 patients who underwent US-guided paracentesis between July 2018 and March 2019. Among them, 82 patients underwent US-guided paracentesis with a newly developed puncture needle. The other 55 patients underwent US-guided paracentesis with a routinely used puncture needle. The periprocedural factors, complications, and repuncture rate were compared between the two groups using the Mann-Whitney U test and Fisher exact test. The repuncture-associated factors were assessed using logistic regression analysis. Results: There were no major or minor complications in either group. The rate of repuncture was significantly lower in the group using the newly developed puncture needle compared with the group using the routinely used puncture needle (p=0.01). The duration of the procedure was significantly shorter with the newly developed puncture needle compared with the routinely used puncture needle (p=0.01). In univariate analysis, the thickness of the abdominal wall (p=0.04) and the use of the newly developed puncture needle (p=0.01) were significantly associated with the rate of repuncture. In multivariate analysis, only the use of the newly developed puncture needle was significantly associated with the rate of repuncture. Conclusion: Using this novel puncture needle with a hard plastic sheath and plastic wings, the rate of repuncture and the duration of the procedure were decreased without complications of US-guided paracentesis.

• 한국정밀공학회지
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• 제33권7호
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• pp.565-570
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• 2016

This paper presents the characteristics related to needle insertion of a robotic device for the automated biopsy procedure. The automated biopsy device, a main component of the robotic needle insertion type intervention system, allows performance of the full biopsy procedure, except for anesthesia, without direct handling of a radiologist or a tele-operated control. In this study, the needle length parameters corresponding to various insertion depths and precision for needle insertion of the automated biopsy device, are discussed. There were two combinations of needle length parameters for appropriate needle insertion and motion capture-based measurement was performed; 0.156 mm error for the 90 mm length commanded insertion displacement was measured. The pre-defined goal is a maximum 1 mm error and thus our measured error is within the acceptable range. In the repeatability check, it was also shown that the device can implement a highly accurate insertion.

• 한국식품저장유통학회지
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• 제6권1호
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• pp.115-120
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• 1999

This study was carried out to investigate the effect of Pine needle extract on lipid oxidation and free radical reaction in iron sources reacted with active oxygen species. The results were summarized as follow; The pine needle extracts didn`t show a distinct effect on reduction of lipid oxidation if the iron ion didn`t exist in oil emulsion. The pine needle extracts played role as a strong chelating agents to bind iron ion if Ferrous iron(Fe\ulcorner) exist in oil emulsion. Ferric iron(Fe) was lower effect than Ferrous iron(Fe) on free radical reaction in oil emulsion. And also, the Fe\ulcorner reacted with pine needle extract did not show distinct effect on free radical reaction, compared to Fe\ulcorner reacted with pine needle extract. And also, Pine needle extracts reacted with H\ulcornerO\ulcorner were tended to show a low oxygen scavenging ability in case of H\ulcornerO\ulcorner only was existed, compared to those of H\ulcornerO\ulcorner + Fe\ulcorner complex. Pine needle extracts were the most powerful Fe\ulcorner binding agents, compared to other strong synthetic antioxidants such as EDTA and DTPA.

• 한국정밀공학회지
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• 제26권4호
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• pp.114-119
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• 2009

In this research, heat-acupuncture needle was coated with $Al_2O_3$ by applying a plasma spray coating method to prevent a skin burn. $Al_2O_3$, which is one of the representative bioceramics, does not have an influence on the chemical change in the body system. The ceramic coating thickness was about $100{\mu}m$. The experiments of heat conduction were performed for uncoated needle and coated needle. The results showed that the surface temperature of needle decreased as the needle was coated with $Al_2O_3$. The surface temperature of uncoated needle was about $48^{\circ}C$, while that of needle coated with $Al_2O_3$ was about $39^{\circ}C$.

• 한국한의학연구원논문집
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• 제15권2호
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• pp.51-61
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• 2009

Objective: Much has been known that the systematical theory of acupuncture was developed from stone needle as therapeutic tools for orthopedic diseases in ancient times. Stone needle is very old therapeutic method like moxibustion and has been recognized that it was developed since the Stone Age in China so far. In the present study, it was examined for the origination and formation of stone needle based on stone relics of the Stone Age in Korean Peninsular, the medical and geographical literatures. Materials and methods: The facts of stone needle was examined and arranged on the ancient medical or geographical literatures such as The Yellow Emperor's Canon Internal Medicine, Shanhaijing as an ancient geographical book, etc. The clan societies and family related to an origination of stone needle was chased together with their cultural characteristics and origination. The stone relics which have been digged out of historic sites in the North-East Asia were examined for a relevance to stone needle. Results: In The Yellow Emperor's Canon Internal Medicine, it was referred to the stone needle that originated from a fishery zone related to the east coast district in North-East Asia. Through the examination of Shan Hai Jing as an ancient geographical book and its historical reviews, a Go-yi clan society who keep Go's family tree dealt well with the stone needle and jewels including jade in the North-East Asia before the publication periods of The Yellow Emperor's Canon Internal Medicine, and is comprised in the culture of Dong-yi clan society but not the Chinese culture. The obsidian stones, which have been digged out of historical sites in the North-East Asia since the Stone Age, are originated from volcanic areas combined with seashore that seems to be Baekdu mountain district in Korea and Kyushu district in Japan. Furthermore, obsidian stone tools which were found out at Laodung peninsula and the Korean peninsula are archeologically similar to the stone needle with regards to the shape, size and dual-use. In addition, specific obsidian stone tools have been used in orthopedic surgery as well-crafted obsidian blades have a cutting edge up to five times sharper than high-quality steel surgical scalpels. Conclusion: The origin of obsidian stone needle is well corresponded to the explanation about that of the stone needle. It is suggested that the stone needle which influenced in completion of acupuncture and Meridian theory in China seems to be an obsidian stone, and distribution of obsidian stone needle has been closely connected to Dong-yi clan society which are lived in the North-East Asia including Baekdu-mountain district.

• 한국산림과학회지
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• 제101권1호
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• pp.62-68
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• 2012

우리나라 계방산, 덕유산, 지리산에 분포하고 있는 가문비나무 집단의 보존과 복원 전략 개발에 요구되는 생육 환경을 구명하기 위하여, 가문비나무 침엽의 수명, 침엽 내 엽록소 및 질소 배분 양상을 조사하였다. 가문비나무의 평균 침엽 생존율은 계방산(87.%)이 가장 높았고, 지리산(71.6%)이 가장 낮았으며, 침엽의 생존율은 침엽 연령 증가와 함께 감소하였다. 덕유산과 지리산 가문비나무의 침엽은 연령이 증가함에 따라 엽록소 a, b 모두 증가하였으나, 계방산 가문비나무의 엽록소 함량은 2년생 침엽에서 가장 높았다. 카로테노이드 함량은 계방산 가문비나무 침엽에서 가장 높았으며, 침엽의 연령이 증가함에 따라 카로테노이드 함량은 증가하였다. 엽록소 a와 b의 비는 지리산에서 가장 높았고, 계방산에서 가장 낮게 나타났다. 세 집단의 침엽 연령이 증가함에 따라 엽록소와 카로테노이드 함량의 비는 점차 감소하였다. 가문비나무 침엽 내 질소 함량은 덕유산이 1.51%로 가장 높게 나타났으며, 계방산이 1.40% 으로 가장 낮았고, 질소 함량은 침엽 연령이 증가하면서 감소하였다. 엽록소와 질소 함량의 비는 침엽의 연령이 증가함에 따라 증가하였다.

• Korean Journal of Acupuncture
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• 제34권3호
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• pp.109-115
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• 2017

Objectives : Many researches have studied warm needling technique to standardize its treatment by temperature measurement and material differences in the effectiveness. The purpose of this study is to compare the temperature changes of the acupuncture needle shaft during the combustion process of the moxa stick to determine the heat transfer pattern of the warn needling. Methods : A moxa stick($7{\times}8mm$) was connected to one side of the needle shaft using a stainless steel needle(ø 0.3 mm, ø 0.5 mm, ø 0.8 mm, shaft length 40 mm) with the needle handle removed. During the warm needling, temperature changes of the needle shaft were observed with an infrared camera(Flir E30) and an infrared thermometer(TESTO 845). Results : In the normal condition, heat transmit of needle shaft increased at spots 10 mm and 25 mm below the moxa stick. The amount of heat transmit increased with the diameter of needle shaft. However, when the heat shield was installed to exclude radiant heat from the moxa stick, heat transfer was less at 10 mm below the moxa stick and no temperature change was observed at 25 mm below the moxa stick. Heat transfer by warm needling does not reach the end of needle shaft even in ø 0.8 mm needle. Conclusions : It is suggested that the radiant heat of moxa stick results in the heat transmit of acupuncture needle shaft. Thus, radiant heat transmit must be considered as one of the heat transfer characteristics of the warm needling.

• Journal of Acupuncture Research
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• 제28권5호
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• pp.65-76
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• 2011

Objectives : Study about needle retaining time. Methods : We reviewed the ancient and the present text of China with using the China academic journal(CAJ) of China national knowledge infrastructure(CNKI) Results & Conclusions : 1. Needle retaining time is important in acupuncture, because the therapy effect is influenced by it. 2. The time of needle retaining is up to those conditions like different disease, viscera and bowels(臟腑), meridian and collateral(經絡), obtaining Qi(得氣), seasons, constitution of the patients and acupuncture tools. In ${\ll}$Hwangdineijing(黃帝內經) ${\gg}$, needle retaining time is called by 'Zhiruzhichu(直入直出)', 'Jichu(疾出)', 'Liu(留)', 'Buliu(不留)', 'Jiuliu(久留)' and 'Liu ${\bigcirc}$ hu(留${\bigcirc}$呼)', and the time was shorter than nowadays. 3. The respiration number was counted to check needle retaining time but we can't find out any evidence. Recently in China, 'obtaining Qi(得氣)' and 'Qi arrival(氣至)' is used to check it. 4. Looking into clinical researches, different diseases need different needle retaining time. For example, 20~30min is appropriate time for musculoskeletal system. 60min is for circulatory system, 10~20min is for peripheral facial nerve paralysis. Insomnia and some stubborn diseases need longer time. Cold and heat(寒熱), deficiency and excess(虛實) are always influences the needle retaining as well. 5. It is important to figure out the most effective needle retaining time for different disease with the base of connection between needle retaining time and effect.

• 한방안이비인후피부과학회지
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• 제28권2호
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• pp.45-53
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• 2015

Objective : This study was performed to investigate the effect of Needle-Embedding Therapy on peripheral facial paralysis. Method : We investigated 60 cases of patients with peripheral facial paralysis, and devided patients into two groups : We treated one group by complex korean medical treatment with Needle-Embedding therapy, and did the other group by complex korean medical treatment without Needle-Embedding therapy. Yanagihara grading system at baseline and final were used for evaluating the effect of the treatment. Results : 1. In Needle-Embedding therapy group and non Needle-Embedding therapy group, compared with baseline, at final, Y score was significantly increased.2. At final, there was significant difference in improvement between Needle-Embedding therapy group and non Needle-Embedding therapy group. Conclusions : Needle-Embedding therapy seem to be effective to improve symptoms of peripheral facial paralysis. Further studies will be needed to identify the beneficial of Needle-Embedding therapy on peripheral facial paralysis.