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Mechanism of keyhole evolution and welding quality of electron beam welded magnesium alloy with scanning path variation via modeling and numerical study 认领 引用
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作者 Qianxing Yin Ziyou Yang +1 位作者 Hui Li Hejun Du 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2025年第7期3166-3185,共20页
Welding quality of electron beam welded joint is usually susceptible to the stability of keyhole during welding process.The more stable the keyhole,the better the welding quality.To reveal the evolution mechanism of k... Welding quality of electron beam welded joint is usually susceptible to the stability of keyhole during welding process.The more stable the keyhole,the better the welding quality.To reveal the evolution mechanism of keyhole and welding quality of the electron beam welded joint of magnesium-gadolinium alloy under different scanning path,numerical simulation was conducted for the changes in morphology of keyhole and liquid flow in molten pool.The magnesium-gadolinium alloy was welded by electron beam in vacuum with two different scanning paths,sinusoid path and cochleoid path,indicating the identical heat input,welding speed,and focusing state.The stability of keyhole was mainly related to the frequency of keyhole collapse.When the sinusoid scanning path was adopted,the fluids both inside the molten pool and at keyhole wall were disorder,corresponding to the numerous independent vortices and dramatically chaotic flows at their junctions.The maximum velocity of fluids ranged from 0.79 m/s to 1.02 m/s.The average and maximum depth of keyhole were 3.48 mm and 4.51 mm,respectively,meaning that the keyhole collapsed frequently.As the scanning path was changed into cochleoid mode,the electron beam scanned in a homogeneous manner without abrupt change in direction and speed like sinusoid path at its peaks and troughs.The maximum velocity of fluids was more uniform without drastic variation,ranging from 0.90 m/s to 1.01 m/s.The average and maximum depth of keyhole were decreased to 3.30 mm and 4.05 mm,respectively,indicating the more stable keyhole and alleviated collapse.Both the actual in-situ capture of molten pool signature and porosity inside the weld corresponded to the analysis of the change in keyhole stability. 展开更多
关键词 Magnesium-gadolinium alloy Keyhole stability Electron beam welding Scanning path Fluid flow
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Numerical analysis of plasma arc physical characteristics under additional constraint of keyhole 认领 引用 被引量：9
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作者 Bin Xu Fan Jiang +3 位作者 Shujun Chen Manabu Tanaka Shinichi Tashiro Nguyen Van Anh 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第3期306-313,共8页
The physical characteristics of a plasma arc affect the stability of the keyhole and weld pool directly during keyhole plasma arc welding(KPAW).There will be significant change for these characteristics because of the... The physical characteristics of a plasma arc affect the stability of the keyhole and weld pool directly during keyhole plasma arc welding(KPAW).There will be significant change for these characteristics because of the interaction between the keyhole weld pool and plasma arc after penetration.Therefore,in order to obtain the temperature field,flow field,and arc pressure of a plasma arc under the reaction of the keyhole,the physical model of a plasma arc with a pre-set keyhole was established.In addition,the tungsten and base metal were established into the calculated domain,which can reflect the effect of plasma arc to weld pool further.Based on magneto hydrodynamics and Maxwell equations,a twoSdimensional steady state mathematical model was established.Considering the heat production of anode and cathode,the distribution of temperature field,flow field,welding current density,and plasma arc pressure were solved out by the finite difference method.From the calculated results,it is found that the plasma arc was compressed a second time by the keyhole.This additional constraint results in an obvious rise of the plasma arc pressure and flow velocity at the minimum diameter place of the keyhole,while the temperature field is impacted slightly.Finally,the observational and metallographic experiments are conducted,and the shapes of plasma arc and fusion line agree with the simulated results generally. 展开更多
关键词 characteristics of plasma arc interaction of keyhole and plasma arc pre-set keyhole model nu-merical analysis
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NTWV-based sensing keyhole dimension in plasma arc welding 认领 引用
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作者 贾传宝 武传松 张裕明 《China Welding》 EI CAS 2008年第3期1-5,共5页
During stable keyhole plasma arc welding, the pilot arc and the transferred arc exist at the meantime, and the arcs can be considered as a composition of two parts inside and outside the nozzle, respectively. Under th... During stable keyhole plasma arc welding, the pilot arc and the transferred arc exist at the meantime, and the arcs can be considered as a composition of two parts inside and outside the nozzle, respectively. Under the mechanical constriction and thermal contraction effects, the inside arc has certain arc length, electron density and arc profile etc. inducing constant tungsten-to-nozzle voltage. However, the arc outside the nozzle diverges at about 5 degrees and has certain characteristics similar to the free arcs. The nozzle-to-workpiece voltage （NTWV） depends mainly on the length of the arc, which gets bigger as increasing of the weld penetration and keyhole size. The NTWV sensor is developed for monitoring NTWV in real time. The welding experiments are designed to get different penetrations and keyhole sizes. It is found that as the weld penetration and the keyhole size increase, NTWV also increases linearly. The NTWV signals can be used as the feedback variable in automatic control of keyhole plasma arc welding. 展开更多
关键词 keyhole plasma arc welding nozzle-to-workpiece voltage penetration keyhole sensor
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Detection of keyhole entrance and exit in plasma arc welding 认领 引用
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作者 Liu Xinfeng Ren Wenjian Gao Jinqiang Zhang Guokai 《China Welding》 EI CAS 2014年第2期41-45,共5页
Sensing of keyhole shape and size is important for controlling of plasma arc welding process. In this study, a synchronous vision system is developed by using two CCD cameras to observe the keyhole entrance and exit s... Sensing of keyhole shape and size is important for controlling of plasma arc welding process. In this study, a synchronous vision system is developed by using two CCD cameras to observe the keyhole entrance and exit simultaneously. Experiments are conducted on stainless steel workpiece, Whole keyhole exit image and part of keyhole entrance image are captured synchronously under different welding conditions. Image processing and calibration algorithms are proposed. The boundary and front point of the keyhole entrance and exit are extracted respectively. The effects of welding current and welding speed on ,front point of keyhole entrance and exit are analyzed. Compared to the front point of the keyhole entrance, the position of the front point of the keyhole exit is better to reflect the variation of the welding parameters. 展开更多
关键词 keyhole plasma are welding keyhole entrance and exit front point synchronous vision system
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Image processing of weld pool and keyhole in Nd:YAG laser welding of stainless steel based on visual sensing 认领 引用 被引量：13
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作者 高进强 秦国梁 +3 位作者 杨家林 何建国 张涛 武传松 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第2期423-428,共6页
In order to obtain good welding quality, it is necessary to apply quality control because there are many influencing factors in laser welding process. The key to realize welding quality control is to obtain the qualit... In order to obtain good welding quality, it is necessary to apply quality control because there are many influencing factors in laser welding process. The key to realize welding quality control is to obtain the quality information. Abundant weld quality information is contained in weld pool and keyhole. Aiming at Nd：YAG laser welding of stainless steel, a coaxial visual sensing system was constructed. The images of weld pool and keyhole were obtained. Based on the gray character of weld pool and keyhole in images, an image processing algorithm was designed. The search start point and search criteria of weld pool and keyhole edge were determined respectively. 展开更多
关键词 laser welding keyhole weld pool edge image processing algorithm
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Keyhole Foraminotomy via a Percutaneous Posterior Full-endoscopic Approach for Cervical Radiculopathy:An Advanced Procedure and Clinical Study 认领 引用 被引量：12
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作者 Rong-jin LUO Yu SONG +5 位作者 Zhi-wei LIAO Hui-peng YIN Sheng-feng ZHAN Sai-deng LU Chao CHEN Cao YANG 《Current Medical Science》 SCIE CAS 2020年第6期1170-1176,共7页
Endoscopic cervical foraminotomy is increasingly used for cervical spondylotic radiculopathy(CSR),but there is great concern about radiation exposure because of the heavy dependence of this surgical method on fluorosc... Endoscopic cervical foraminotomy is increasingly used for cervical spondylotic radiculopathy(CSR),but there is great concern about radiation exposure because of the heavy dependence of this surgical method on fluoroscopy.The objective of this study was to introduce in detail an advanced surgical technique of keyhole foraminotomy via a percutaneous posterior full-endoscopic approach as a treatment for CSR and investigate its clinical outcomes.We retrospectively reviewed 33 consecutive patients with CSR who underwent keyhole foraminotomy via a percutaneous posterior full-endoscopic approach from October 2015 to April 2017.The patients’general characteristics,including operative time,blood loss,hospital stay,complications,and recurrence,were obtained.Clinical outcomes were evaluated using the visual analogue scale(VAS)for radicular pain,the neck disability index(NDI)for functional assessment,and the modified MacNab criteria for patient satisfaction.All operations were successfully performed(mean operation time,62 min),with no measurable blood loss or severe related complications.The mean follow-up was 25 months.The VAS and NDI scores were significantly improved as compared with those in the preoperative period(preoperative vs.final follow-up:7.6±1.6 vs.3.83±7.34 for VAS,P<0.01;69.5%±10.5%vs.17.54%±13.40%for NDI,P<0.01).Of the 33 patients,32(97.0%)had good-to-excellent global outcomes and all patients obtained symptomatic improvement.In conclusion,keyhole foraminotomy via a percutaneous posterior full-endoscopic approach is an efficient,safe,and feasible procedure for the treatment of CSR.Its simplified single-step blunt incision for localization appears to decrease radiation exposure risks. 展开更多
关键词 cervical spondylotic radiculopathy percutaneous posterior full endoscopic keyhole foraminotomy
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Study on stress and deformation of keyhole gas tungsten arc-welded joints 认领 引用 被引量：7
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作者 Han Tao Gu Shiwei +2 位作者 Xu Liang Zhang Hongjie OuYang Kai 《China Welding》 CAS 2020年第1期17-25,共9页
Keyhole gas tungsten arc welding(K-TIG)of Q345 low alloy steel plates was simulated by using SYSWELD software.The temperature field of the K-TIG welding process was simulated with three different combined heat sources... Keyhole gas tungsten arc welding(K-TIG)of Q345 low alloy steel plates was simulated by using SYSWELD software.The temperature field of the K-TIG welding process was simulated with three different combined heat sources and was compared with the weld profile that was obtained experimentally.The temperature field that was obtained by a combination of a double ellipsoid heat source on the upper half and a three-dimensional Gauss heat source on the lower half was similar to the real situation.The effects of plate thickness,gap and welding speed on the deformation and stress of the K-TIG welded joints were investigated by K-TIG welding numerical simulation.A reduction in the thickness of the weld plates reduced the z-direction deformation and transverse residual stress;an appropriate gap reduced the residual stress and an increase in the welding speed reduced deformation after welding,but did not help to control the residual stress after welding. 展开更多
关键词 keyhole gas tungsten arc welding numerical simulation deformation residual stress
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翼点keyhole入路处理前循环及鞍周部位病变 认领 引用 被引量：9
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作者 张远征 潘隆胜 +5 位作者 卜博 乔光宇 孙正辉 周涛 张军 佟怀宇 《中国微侵袭神经外科杂志》 CAS 2003年第1期8-10,共3页
目的介绍颞部鬓角皮肤小切口,翼点keyhole骨孔(2.5cm×3cm)入路处理前循环动脉瘤、前颅窝底及鞍周部位病变。方法病人仰卧、面转向对侧60°。沿鬓角的发际前缘做一皮肤切口,长约6～7cm。从额骨颧突下剥离颞肌,显露出翼点。颅骨... 目的介绍颞部鬓角皮肤小切口,翼点keyhole骨孔(2.5cm×3cm)入路处理前循环动脉瘤、前颅窝底及鞍周部位病变。方法病人仰卧、面转向对侧60°。沿鬓角的发际前缘做一皮肤切口,长约6～7cm。从额骨颧突下剥离颞肌,显露出翼点。颅骨钻孔后直接用咬骨钳咬成3cm×3cm骨孔。2∶3显露额颞叶,切开硬脑膜,分离外侧裂,进入手术区。结果采用此keyhole开颅术进行各类手术52例,手术进行顺利。结论翼点keyhole开颅术具有对外观影响小,开关颅时间短(15～20min),创伤轻微等优点。 展开更多
关键词 前循环病变 鞍周部位病变 颞部鬓角皮肤小切口 翼点keyhole骨孔入路 显微神经外科
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基于Keyhole和Landsat MSS融合影像的土地利用变化监测研究——以杭州湾南岸为例 认领 引用 被引量：3
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作者 陈喜芬 吴文渊 +3 位作者 卢善龙 徐俊锋 张登荣 胡潭高 《北京师范大学学报（自然科学版）》 CAS CSCD 北大核心 2021年第6期845-853,共9页
以杭州湾南岸为研究区,利用1980年9月20日的Keyhole遥感影像与同一时期的Landsat MSS遥感影像,通过融合处理,获得既具有高空间分辨率又有多光谱分辨率的历史遥感影像,填补历史高分辨率遥感影像的空缺.研究结果将历史土地利用类型变化监... 以杭州湾南岸为研究区,利用1980年9月20日的Keyhole遥感影像与同一时期的Landsat MSS遥感影像,通过融合处理,获得既具有高空间分辨率又有多光谱分辨率的历史遥感影像,填补历史高分辨率遥感影像的空缺.研究结果将历史土地利用类型变化监测时间序列推前的同时,提高杭州湾南岸土地利用变化监测的精度.研究中将使用历史融合影像对杭州湾土地利用类型变化进行监测,同时结合1990-2020年4景Landsat遥感影像,获得杭州湾南岸地区近41年的土地利用情况,辅以前人的目视解译结果图,得到分类精度>90%的土地覆被利用分类结果.从面积变化、类型转化、年均变化率3方面分析讨论了1980-2020年间杭州湾南岸地区土地利用的时空变化特征.结果表明:1980-1990年,杭州湾南岸库塘呈减少的趋势,耕地逐渐向海岸地区扩张;1990-2020年,城市的扩张面积不断增加且呈现向海岸扩张的趋势,库塘的面积增加明显,主要表现在人工养殖场继续向海岸扩张.城市的发展是影响杭州湾南岸土地利用变化的主要因素,并且在杭州湾城市规划的同时应该充分考虑其生态环境的问题,加强自然湿地保护,严格控制自然湿地的开发规模,坚持可持续发展,在保护湿地的基础上进行合理的开发利用. 展开更多
关键词 图像融合 Keyhole影像 土地利用变化 变化监测
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Front side keyhole detection in plasma arc welding of stainless steel 认领 引用 被引量：3
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作者 董春林 吴林 +2 位作者 张慧 朱轶峰 邵亦陈 《China Welding》 EI CAS 1999年第2期24-32,共9页
The establishment and maintenance of a stable keyhole during plasma arc welding process is of critical importance. Spectroscopic study on the relationship between the keyhole and arc light radiation intensity is pursu... The establishment and maintenance of a stable keyhole during plasma arc welding process is of critical importance. Spectroscopic study on the relationship between the keyhole and arc light radiation intensity is pursued in plasma arc welding of stainless steel. It is found that there are salient changes similar to negative pulse in arc light radiant intensity signal with the characteristic changes of the keyhole. In addition, the above signal, which is of particular advantage for estimating the keyhole formation or closure, can be improved by means of detecting sensitive spectral line intensity. 展开更多
关键词 PAW keyhole spectra
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Behavior of vapor/plasma within the keyhole and above the workpiece during CO_2 laser penetration welding 认领 引用 被引量：4
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作者 段爱琴 陈俐 巩水利 《China Welding》 EI CAS 2008年第4期7-11,共5页
In this paper, a high-speed camera and an optical emission monitor were used to study the behavior of vapor/ plasma during CO2 laser welding of SUS304 stainless steel. Results of optical emission from vapor/plasma sho... In this paper, a high-speed camera and an optical emission monitor were used to study the behavior of vapor/ plasma during CO2 laser welding of SUS304 stainless steel. Results of optical emission from vapor/plasma show that two characteristic frequency bands exist, 100 -500 Hz and 1 500 -3 500 Hz. At the same time, the changing images of vapor/ plasma and bottom pool also confirm that there are two different fluctuation frequency bands. One of the frequency bands represents the characteristic of vapor/plasma within the keyhole, and it is within 167 -500 Hz. Another frequency band is within 1 500 - 3 500 Hz, and it obviously derives from the shielding gas. Some factors may cause these frequency differences between the keyhole plasma and the shielding gas plasma. One of them is that the vapor/plasma pressure within the keyhole will increase slowly. 展开更多
关键词 CO2 laser welding vapor/plasma keyhole frequency
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Finite element analysis of keyhole plasma arc welding based on an adaptive heat source mode 认领 引用 被引量：5
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作者 胡庆贤 武传松 张裕明 《China Welding》 EI CAS 2007年第2期55-58,共4页
An adaptive heat source mode is proposed to account for the keyhole effect and the characteristics of volumetric distribution along the direction of the workpiece thickness. Finite element analysis of the temperature ... An adaptive heat source mode is proposed to account for the keyhole effect and the characteristics of volumetric distribution along the direction of the workpiece thickness. Finite element analysis of the temperature field in keyhole plasma arc welding is conducted and the weld geometry is obtained. The predicted results are in agreement with the measured ones. 展开更多
关键词 keyhole plasma arc welding adaptive heat source mode finite element analysis
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Acquisition and processing of coaxial image of molten pool and keyhole in Nd:YAG laser welding with high power 认领 引用 被引量：2
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作者 秦国梁 齐秀滨 +2 位作者 杨永波 王旭友 林尚扬 《China Welding》 EI CAS 2004年第1期51-55,共5页
An experimental setup of acquiring the coaxial visual image of the molten pool and keyhole in high power Nd:YAG laser welding is introduced in this paper. It is one of the most difficult problems in acquiring coaxial ... An experimental setup of acquiring the coaxial visual image of the molten pool and keyhole in high power Nd:YAG laser welding is introduced in this paper. It is one of the most difficult problems in acquiring coaxial image that the coaxial imaging signal of molten pool and keyhole must be separated from the laser beam with high power. This problem was resolved by designing a dichroitic spectroscope. The characteristics of imaging signal were analyzed and the coaxial image of molten pool and keyhole was acquired. A smoothing filter and a homomorphic filter were designed to remove the low frequency noise and to enhance the image according to the characteristics of imaging signal. At last, edges of molten pool and keyhole were detected and extracted based on image segmentation with threshold. 展开更多
关键词 laser welding molten pool keyhole coaxial visual image image processing
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Transport phenomena and keyhole evolution process in laser welding of stainless steel 认领 引用 被引量：4
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作者 LIU Jiang-wei ZENG Ping-wang +1 位作者 RAO Zheng-hua ZHANG Tian-li 《Journal of Central South University》 SCIE EI CAS CSCD 2019年第8期2088-2099,共12页
Knowledge of transport phenomena and keyhole evolution is important for controlling laser welding process. However, it is still not well understood by far due to the complex phenomena occurring in a wide temperature r... Knowledge of transport phenomena and keyhole evolution is important for controlling laser welding process. However, it is still not well understood by far due to the complex phenomena occurring in a wide temperature range. A transient 3D model including heat transfer, fluid flow and tracking of free surface is built in this study. The transport phenomena are investigated by calculating the temperature and velocity fields. The 3D dynamic keyhole evolution process is revealed through tracking free surface using volume-of-fluid method. The results show that the keyhole deepening speed decreases with laser welding process before the quasi-steady state is reached. The plasma can greatly affect the keyhole depth through absorbing a great amount of laser energy and thus lowering the recoil pressure. Moreover, the relationship between keyhole depth and weld penetration is also discussed. This paper can help to better understand the dynamics in molten pool and then improve laser welding process. 展开更多
关键词 laser welding keyhole evolution weld pool dynamics free surface tracking weld penetration
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Filling technique for keyhole of friction stir spot welding based on the principles of resistance spot welding 认领 引用 被引量：4
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作者 Deng Lipeng Ke Liming Liu Jinhe 《China Welding》 CAS 2019年第3期34-41,共8页
Keyhole at the end of a weld prepared by friction stir welding(FSW)is one of the major issues that impede the application of FSW.To address this issue,a keyhole filling technique was proposed in this paper,which is ba... Keyhole at the end of a weld prepared by friction stir welding(FSW)is one of the major issues that impede the application of FSW.To address this issue,a keyhole filling technique was proposed in this paper,which is based on the principles of resistance spot welding(RSW).A three-phase secondary rectifier resistance spot welder was applied as the experimental instrument for filling the keyhole in the center of friction stir spot weld(FSSW).The test sheet is a 2024-T4 aluminium alloy with a thickness of 6.0mm.The experiments results show that the filled joint strength is improved by 26.12%since the area is increased for the plug in the keyhole.And there are two kinds of dimples in the tensile fracture-equiaxial dimples and long dimples.The filled joint involves the fusion welding zone(FWZ),pressure welding zone(PWZ),melted plug zone(MPZ),and plastic deformation zone(PDZ).The FWZ and the PWZ is the melting bond and diffusion bond between the plug and keyhole,respectively.The MPZ is the center part and the PDZ is upper or lower part of the plug. 展开更多
关键词 friction stir spot welding resistance spot welding keyhole aluminum alloy
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Detection accuracy of target accelerations based on vortex electromagnetic wave in keyhole space 认领 引用 被引量：1
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作者 郭凯 雷爽 +2 位作者 雷艺 周红平 郭忠义 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第2期283-290,共8页
The influence of the longitudinal acceleration and the angular acceleration of detecting target based on vortex electromagnetic waves in keyhole space are analyzed.The spectrum spreads of different orbital angular mom... The influence of the longitudinal acceleration and the angular acceleration of detecting target based on vortex electromagnetic waves in keyhole space are analyzed.The spectrum spreads of different orbital angular momentum(OAM)modes in different non-line-of-sight situations are simulated.The errors of target accelerations in detection are calculated and compared based on the OAM spectra spreading by using two combinations of composite OAM modes in the keyhole space.According to the research,the effects about spectrum spreads of higher OAM modes are more obvious.The error in detection is mainly affected by OAM spectrum spreading,which can be reduced by reasonably using different combinations of OAM modes in different practical situations.The above results provide a reference idea for investigating keyhole effect when vortex electromagnetic wave is used to detect accelerations. 展开更多
关键词 vortex electromagnetic waves detect accelerations keyhole space spectrum spread
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Determining the keyhole geometry based on double-elliptic distribution of plasma arc pressure 认领 引用 被引量：4
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作者 霍玉双 武传松 《China Welding》 EI CAS 2009年第3期12-15,共4页
The plasma arc pressure plays an important role in determining the keyhole formation and size. So it is of great significance to choose adaptive distribution mode of the plasma arc pressure for determining keyhole sha... The plasma arc pressure plays an important role in determining the keyhole formation and size. So it is of great significance to choose adaptive distribution mode of the plasma arc pressure for determining keyhole shape and size. In this study, through employing a double-elliptic distribution mode of plasma arc pressure, three-dimensional keyhole was numerically simulated. The unsymmetric feature of the keyhole inside the weld pool was described. The development of keyhole was demonstrated under different levels of welding current. The critical current required to form an open keyhole was obtained for the study cases . 展开更多
关键词 keyhole shape double-elliptic distribution plasma arc pressure
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A computer-based control system for keyhole plasma arc welding 认领 引用 被引量：2
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作者 贾传宝 武传松 张裕明 《China Welding》 EI CAS 2007年第4期7-10,共4页
A new kind of control system for keyhole plasma arc welding （K-PAW） was developed based on the computer and the Graphics Language--LabVIEW. It can set and output the required current waveforms with desired decreasin... A new kind of control system for keyhole plasma arc welding （K-PAW） was developed based on the computer and the Graphics Language--LabVIEW. It can set and output the required current waveforms with desired decreasing slopes so that the corresponding ＂opening and closing＂ of keyhole can occur periodically. With this control strategy of welding current waveforms, the workpiece is fully penetrated while no burn-through Occurs. Keyhole plasma arc welding experiments were conducted to verify the stability and reliability of the developed system. 展开更多
关键词 control system keyhole plasma arc welding
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Experimental determination of the weld penetration evolution in keyhole plasma arc welding 认领 引用 被引量：2
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作者 胡庆贤 武传松 张裕明 《China Welding》 EI CAS 2007年第1期6-8,共3页
Keyhole plasma arc welding experiments are conducted to measure the weld geometry and penetration at different moments during the initial phase from igniting arc to quasi-steady state. Indirect information on keyhole ... Keyhole plasma arc welding experiments are conducted to measure the weld geometry and penetration at different moments during the initial phase from igniting arc to quasi-steady state. Indirect information on keyhole formation and evolution in plasma arc welding can be extracted based on the weld macrophotograph at cross section. It has laid foundation to verify the mathematical models of keyhole plasma arc welding. 展开更多
关键词 weld penetration keyhole plasma arc welding
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Keyhole术式在腹腔镜造口旁疝修补术中的应用 认领 引用 被引量：2
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作者 王志凯 张超 +3 位作者 张辉 梁鸿 郑伟 谢毅 《河南医学研究》 CAS 2015年第7期33-34,共2页
目的探讨Keyhole术式在造口旁疝修补术中的应用效果。方法回顾性分析2013年4月至2014年12月河南省人民医院胃肠外科实施Keyhole术治疗的8例直肠癌术后结肠造口旁疝患者的临床资料。结果 8例手术均获成功。手术时间为48～162 min,平均106... 目的探讨Keyhole术式在造口旁疝修补术中的应用效果。方法回顾性分析2013年4月至2014年12月河南省人民医院胃肠外科实施Keyhole术治疗的8例直肠癌术后结肠造口旁疝患者的临床资料。结果 8例手术均获成功。手术时间为48～162 min,平均106 min。疝环直径3～5 cm,平均4.2 cm。术中出血5～75 ml,平均20 ml。术后2例发生补片区域血清肿,经彩超引导下穿刺引流后痊愈,未发生与手术相关的感染。术后住院时间为4～8 d,平均6.5 d。术后随访3～24个月,2例复发。结论 Keyhole术式在腹腔镜造口旁疝修补术中安全、可行,早期的临床疗效较理想,但复发率高,远期效果差。 展开更多
关键词 腹腔镜 造口旁疝 Keyhole术
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