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Wang Fangjun,Leng Xia,Gao Yi,Shen Xiuyun,Wang Wenping,Liu Huamin,Liu Pengfei 대한소화기내시경학회 2022 Clinical Endoscopy Vol.55 No.4
Background/Aims: Endoscopic wound suturing is an important factor that affects the ability to remove large and full-thickness lesionsduring endoscopic resection. We aimed to evaluate the effect of a traction metal clip with a fishhook-like device on wound sutures afterendoscopic resection. Methods: From July 2020 to April 2021, patients who met the enrollment criteria were treated with a fishhook-like device during theoperation to suture the postoperative wound (group A). Patients with similar conditions and similar size wounds who were treatedwith a “purse-string suture” to suture the wounds were retrospectively analyzed as the control group (group B). Difference in the suturerate, adverse events, time required for suturing, and number of metal clips were compared between the two groups. Results: The time required for suturing was 7.72±0.51 minutes in group A and 11.50±0.91 minutes in group B. This difference was statisticallysignificant (F=13.071, p=0.001). The number of metal clamps used in group A averaged 8.1 pieces/case, and the number ofmetal clamps used in group B averaged 7.3 pieces/case. This difference was not statistically significant (F=0.971, p=0.331). Conclusions: The traction metal clip with the fishhook-like device is ingeniously designed and easy to operate. It has a good suture effecton the wound after endoscopic submucosal dissection and effectively prevents postoperative adverse events.
Chunteng Li,Yuzhong Jiang,Guanghui Yang,Fangjun Liu 한국자기학회 2018 Journal of Magnetics Vol.23 No.2
In order to design a kind of high-sensitive, narrow-band and portable search coil magnetometer, based on the principle of magnetic measuring, an equivalent model of search coil magnetometer with parallel matched capacitor is established. The formula of the induced coil is derived, low-noise integrated operational amplifier is designed and made as the preamplifier circuit of search coil magnetometer. The parameters of the inductive coil based on multi-parameter joint optimization are obtained under consideration of the sensitivity, bandwidth, weight and volume of the inductive coil simultaneously. The search coil magnetometer test is completed in the electromagnetic shielding room. And the result shows that the sensitivity of the designed search coil magnetometer is 40 fT√Hz @80 Hz, under the precondition of guaranteeing the weight, volume and bandwidth, which is basically the same as that of the simulation.
Weijiu Huang,Shanshan Yuan,Linjiang Chai,Luyao Jiang,Haiding Liu,Fangjun Wang,Dongzhe Wang,Junjun Wang 대한금속·재료학회 2019 METALS AND MATERIALS International Vol.25 No.2
A medium-strained (13% cold-drawing) 316L austenitic stainless steel rod was subjected to annealing between 750 and1100 °C. Electron backscatter diffraction and electron channeling contrast imaging techniques were jointly employed toinvestigate the development of microstructures and grain boundary character distribution during the annealing treatments. Results show that annealing at temperatures below 900 °C does not evidently change microstructures of the as-drawn specimen. Full recrystallization is observed after the temperature reaches 1000 °C and the deformation microstructures are replacedby fine and uniform recrystallized grains. A large number of annealing twins (with Σ3 misorientation) are produced by therecrystallization, leading to markedly increased fractions of special boundaries (fSB). The maximum fSB is found to be 67.3%in the present study. In addition, for the recrystallized grains, rapid growth is noticed at relatively high temperatures due toeasy migration of grain boundaries.