The Beila Ophiolite from the Bangong-Nujiang Suture Zone, Northern Tibetan Plateau

The Beila ophiolite is located in the middle part of the Bangong-Nujiang suture zone,northern Tibetan plateau.It is a complete ophiolite suite,and plays a key role in understanding the evolution of the Bangong-Nujiang suture zone,as well as the Meso-Tethys Ocean.The Beila ophiolite was composed of peridotite,serpentinite,gabbro,pillow basalt,and minor rodingite.Peridotites comprisemainlymedium–tocoarse–grained serpentinized harzburgites and minor plagioclase-bearing lherzolites and dunites.There are some felsic-ultramafic dykes within the peridotite and they are mainlypegmatoidal pyroxenites,coarse to fine-grained gabbros,and diabases.Gabbros included isotropic and cumulate gabbros,and they commonly contain minor pegmatoidal gabbros veins.Pillow basalts and basaltic andesites overlaid on the margin of the serpentinized peridotites.Rodingite occurs as lenses and/or dykes within the host serpentinized peridotites.Zircon SHRIMP U–Pb dating for two rodingite samples yielded the ages ranging from172 to 164 Ma.Whole-rock geochemical and zircon Hf isotopic data show that the Beila ophiolite shows SSZ-type ophiolite affinity.Finally,we suggest that the Beila ophiolite was generated in an initial subduction process at the middle Jurassic(164–172 Ma).

The Characteristics of Yongzhu–Guomang Lake Ophiolitic Melange in Bangong-Nujiang Suture, Xizang(Tibet),China

Yongzhu–Guomang Lake ophiolitic melange exposed about 100 km with large scale and complete ophiolitic uint in Xainza County,Xizang(Tibet).It is connected with Nam Lake,Kaimeng ophiolitic mélange to the east,and

Variation of Moho Depth across Bangong-Nujiang Suture in Central Tibet—Results from Deep Seismic Reflection Data

There is a long-term dispute at Moho depth across the Bangong-Nujiang suture (BNS). Due to the complicated and changeable seismic geological condition, it is not easy to acquire images of the reflective Moho in central Tibet. In the support of the SinoProbe project, a series of deep seismic reflection profiles were conducted to image Moho structure across the BNS and the Qiangtang terrane. These profiles extend from the northern Lhasa terrane to the Qiangtang terrane crossing the BNS. Both shot gathers and migration data show clear Moho images beneath the BNS. The Moho depth varies from 75.1 km (~24 s TWT) beneath the northmost Lhasa terrane to 68.9 km (~22 s TWT) beneath southmost Qiangtang terrane, and rises smoothly to 62.6 km (~20 s TWT ) at ~28 km north of the BNS beneath the Qiangtang terrane. We speculate that the Moho appears a 6.2 km sharp offset across the BNS and becomes ~12.5 km shallower from the northmost Lhasa terrane to the south Qiangtang terrane at ~28 km north of the BNS. The viewpoint of Moho depth across the BNS based on deep seismic reflection data is inconsistent with the previous 20 km offset.

The Cretaceous of the Eastern Bangong-Nujiang Suture Zone (Tibet):Tectono-Sedimentation

The ophiolite-bearing Bangong-Nujiang zone (BNZ) traversing central Tibet from east to west separates the Qiangtang block in the north from the Lhasa block in the south. The Cretaceous of the area includes Chuanba Formation (K 1c ), Duoba Formation (K 1d ), Langshan Formation (K 1l ) and Jiangba Formation (K 2j ). The K 1c is composed of black shale, sandy pelite, siltstone, sandstone, coal beds and volcanic rocks, of shallow marine facies. The K 1 d consists of terrestrial siliciclastics intercalated with some calcareous sandstone beds bearing Orbitolina sp. indicating marine influence. The K 1j is carbonate platform deposits of shallow marine and lagoon. The K 2j is characterized by terrestrial thick massive red conglomerate. An active margin related to B-subduction zone is considered to be the geological setting of the Cretaceous sedimentation.

Double-nylon purse-string suture in closing postoperative wounds following endoscopic resection of large(≥3 cm)gastric submucosal tumors

BACKGROUND Endoscopic full-thickness resection(EFTR)of gastric submucosal tumors(SMTs)is safe and effective;however,postoperative wound management is equally important.Literature on suturing following EFTR for large(≥3 cm)SMTs is scarce and limited.AIM To evaluate the efficacy and clinical value of double-nylon purse-string suture in closing postoperative wounds following EFTR of large(≥3 cm)SMTs.METHODS We retrospectively analyzed the data of 85 patients with gastric SMTs in the fundus of the stomach or in the lesser curvature of the gastric body whose wounds were treated with double-nylon purse-string sutures after successful tumor resection at the Endoscopy Center of Renmin Hospital of Wuhan University.The operative,postoperative,and follow-up conditions of the patients were evaluated.RESULTS All tumors were completely resected using EFTR.36(42.35%)patients had tumors located in the fundus of the stomach,and 49(57.65%)had tumors located in the body of the stomach.All patients underwent suturing with double-nylon sutures after EFTR without laparoscopic assistance or further surgical treatment.Postoperative fever and stomach pain were reported in 13(15.29%)and 14(16.47%)patients,respectively.No serious adverse events occurred during the intraoperative or postoperative periods.A postoperative review of all patients revealed no residual or recurrent lesions.CONCLUSION Double-nylon purse-string sutures can be used to successfully close wounds that cannot be completely closed with a single nylon suture,especially for large(≥3 cm)EFTR wounds in SMTs.

Early Triassic Volcanic Rocks in the Western Yarlung Zangbo Suture Zone:Implications for the Opening of the Neo-Tethys Ocean

In this study,zircon U-Pb dating of volcanic rocks from the Zhongba ophiolite of the Yarlung Zangbo Suture Zone(YZSZ)in southern Xizang(Tibet)yielded an age of 247±3 Ma.According to whole rock geochemical and Sr-NdPb isotopic data,the Early Triassic samples could be divided into two groups:Group 1 with P-MORB affinity,showing initial^(87)Sr/^(86)Sr ratios of 0.70253–0.70602,ε_(Nd)(t)values of 4.2–5.3,(^(206)Pb/^(204)Pb)_(t)ratios of 16.353–18.222,(^(207)Pb/^(204)Pb)_(t)ratios of 15.454–15.564,and(^(208)Pb/^(204)Pb)_(t)ratios of 35.665–38.136;Group 2 with OIB affinity,showing initial^(87)Sr/^(86)Sr ratios of 0.70249–0.70513,ε_(Nd)(t)values of 4.4–4.9,(^(206)Pb/^(204)Pb)_(t)ratios of 17.140–18.328,(^(207)Pb/^(204)Pb)_(t)ratios of 15.491–15.575,and(^(208)Pb/^(204)Pb)_(t)ratios of 36.051–38.247.Group 2 rocks formed by partial melting of the mantle source enriched by a former plume,and assimilated continental crustal material during melt ascension.The formation of Group 1 rocks corresponds to the mixing of OIB melts,with the same components as Group 2 and N-MORBs.The Zhongba Early Triassic rocks belong to the continental margin type ophiolite and formed in the continental–oceanic transition zone during the initial opening of the Neo-Tethys in southern Xizang(Tibet).

Transcriptomic and cellular decoding of scaffolds-induced suture mesenchyme regeneration

Precise orchestration of cell fate determination underlies the success of scaffold-based skeletal regeneration.Despite extensive studies on mineralized parenchymal tissue rebuilding,regenerating and maintaining undifferentiated mesenchyme within calvarial bone remain very challenging with limited advances yet.Current knowledge has evidenced the indispensability of rebuilding suture mesenchymal stem cell niches to avoid severe brain or even systematic damage.But to date,the absence of promising therapeutic biomaterials/scaffolds remains.The reason lies in the shortage of fundamental knowledge and methodological evidence to understand the cellular fate regulations of scaffolds.To address these issues,in this study,we systematically investigated the cellular fate determinations and transcriptomic mechanisms by distinct types of commonly used calvarial scaffolds.Our data elucidated the natural processes without scaffold transplantation and demonstrated how different scaffolds altered in vivo cellular responses.A feasible scaffold,polylactic acid electrospinning membrane(PLA),was next identified to precisely control mesenchymal ingrowth and self-renewal to rebuild non-osteogenic suture-like tissue at the defect center,meanwhile supporting proper osteointegration with defect bony edges.Especially,transcriptome analysis and cellular mechanisms underlying the well-orchestrated cell fate determination of PLA were deciphered.This study for the first time cellularly decoded the fate regulations of scaffolds in suture-bony composite defect healing,offering clinicians potential choices for regenerating such complicated injuries.

Single self-leading suture technique for iridodialysis repairment

Dear Editor,We described an innovative“single self-leading suture technique”for repairing iridodialysis.Instead of moving the needle forth and back,our method is easier to manipulate in the narrow surgical space between the cornea and lens,which will decrease the unnecessary complications related to iatrogenic injury.We provide an economical friendly and less time-taking method,which improves the suture accuracy.

Intermittent sliding-lock-knot suture for limbal conjunctival autograft fixation in pterygium surgery:a technique note

AIM:To report a technique used with intermittent slidinglock-knot(ISLK)fixation for limbal conjunctival autografts in pterygium surgery and compared with those of routine intermittent(RI)fixation.METHODS:Consecutive patients with primary pterygium who had undergone pterygium excision combined with limbal conjunctival autograft transplantation between March 2021 and March 2022 at our institute were retrospectively analyzed.Primary outcome measures were mean duration of surgery and suture removal,degree of conjunctival hyperemia on postoperative day 1,pain score at suture removal,postoperative symptoms at 6mo,including conjunctival hyperemia,foreign body sensation,and graft stability.RESULTS:Ninety-eight patients underwent monocular surgery and were divided into ISLK(51 eyes)and RI(47 eyes)groups according to the type of conjunctiva autograft fixation method planned.There was no significant difference in mean duration of surgery between the two groups(18.59±2.39min vs 18.15±2.20min,P=0.417);however,compared to the RI group,shorter suture removal times were observed in the ISLK group[0.58min(0.42-0.87)vs 3.00min(2.21-4.15),P<0.001].The degree of conjunctival hyperemia on postoperative day 1 was milder in the ISLK group(P<0.001).Pain scores at suture removal were lower in the ISLK group than in RI group[1(0-3)vs 2(1-4),P<0.001].Postoperative symptoms at 6mo were comparable between the groups(P=0.487),with no recurrence.CONCLUSION:ISLK is an innovative method for limbal conjunctival autograft fixation after pterygium excision.Compared to RI fixation,ISLK facilitates suture removal and reduces discomfort,with comparable surgery duration and less conjunctival hyperemia.

Outcomes of a non-randomised audit of single pigtail suture stents in urolithiasis management of Asian patients in Singapore

Objective:Double-J(DJ)ureteric stents are commonly placed perioperatively for semirigid or flexible ureteroscopic renal surgery.It is believed that lesser stent material within the bladder mitigates stent-related symptoms.This study aimed to evaluate the J-Fil ureteral stent,a single pigtail suture stent compared with conventional DJ stent in relation to stent symptoms in an Asian population undergoing ureterorenal intervention.Methods:Based on internal audit committee recommendation approval,the records of 50 patients retrieved,available data of 41 patients who were prospectively enrolled into two groups(Group 1[J-Fil stent group],n=21 and Group 2[DJ stent group],n=20)between August 2020 to January 2021,were analysed.Parameters compared were nature of procedure,stone location and size,ease of deployment or removal,and complications.A modified universal stent symptom questionnaire was used to assess morbidity of stent symptoms within 48 h of insertion and at removal.Results:Both groups had similar median age,distribution in male to female ratio,and stone size.The overall median universal stent symptom questionnaire score at insertion was similar for bladder pain,flank or loin pain,and quality of life between Group 1 and 2;however,at removal Group 1 fared significantly better than Group 2,especially for flank or loin pain and pain at voiding.Both groups had similar ease in insertion with no hospital readmissions.Conclusion:Our audit favoured the single pigtail suture stent in Asian ureters in mitigating stent-related issues.It showed a good safety profile with easy deployment and removal.It promises a new standard in stenting.

Arthroscopic M-shaped suture fixation for tibia avulsion fracture of posterior cruciate ligament:A modified technique and case series

BACKGROUND Tibial avulsion fractures of the posterior cruciate ligament(PCL)are challenging to treat and compromise knee stability and function.Traditional open surgery often requires extensive soft tissue dissection,which may increase the risk of morbidity.In response to these concerns,arthroscopic techniques have been evolving.The aim of this study was to introduce a modified arthroscopic tech-nique utilizing an M-shaped suture fixation method for the treatment of tibial avulsion fractures of the PCL and to evaluate its outcomes through a case series.AIM To evaluate the effects of arthroscopic M-shaped suture fixation on treating tibia avulsion fractures of the PCL.METHODS We developed a modified arthroscopic M-shaped suture fixation technique for tibia avulsion fractures of the PCL.This case series included 18 patients who underwent the procedure between January 2021 and December 2022.The patients were assessed for range of motion(ROM),Lysholm score and International knee documentation committee(IKDC)score.Postoperative complications were also recorded.RESULTS The patients were followed for a mean of 13.83±2.33 months.All patients showed radiographic union.At the final follow-up,all patients had full ROM and a negative posterior drawer test.The mean Lysholm score significantly improved from 45.28±8.92 preoperatively to 91.83±4.18 at the final follow-up(P<0.001),and the mean IKDC score improved from 41.98±6.06 preoperatively to 90.89±5.32 at the final follow-up(P<0.001).CONCLUSION The modified arthroscopic M-shaped suture fixation technique is a reliable and effective treatment for tibia avulsion fractures of the PCL,with excellent fracture healing and functional recovery.

Assessing clinical and patient reported outcomes of Sironix suture anchors in rotator cuff and Bankart repair surgeries

BACKGROUND Rotator cuff tears and Bankart lesions significantly affect shoulder function and quality of life.Arthroscopic rotator cuff repair and Bankart repair has become the standard treatment for restoring function and reducing pain.Recent advancements include new suture anchor technologies,such as the Sironix suture anchor known for its biomechanical strength and promising outcomes.However,there are limited real-world data on its effectiveness and safety,particularly in the Indian population.AIM To evaluate the effectiveness and safety of Sironix suture anchors in rotator cuff and Bankart repair surgeries.METHODS Sixty participants underwent surgery between January 2021 and December 2022,and demographic data and postoperative outcomes were collected through retrospective reviews and telephonic interviews.Validated scales,including the PENN Shoulder Score(PSS),Disabilities of the Arm,Shoulder,and Hand(DASH)score,and Single Assessment Numeric Evaluation(SANE),were utilized for assessment.RESULTS Treatment with Sironix suture anchor devices,including Ceptre Knotted UHMWPE Suture Titanium Anchor,Spyke Knotted UHMWPE Suture Peek Anchor,Stativ Knotted UHMWPE Suture Anchor,and Viplok Knotless Peek Screw Anchor with Titanium Tip,revealed no repair failures.Participants demonstrated high satisfaction and functional improvement,as evidenced by the mean Quick DASH score(32.01)and PSS(71.65)and the satisfactory SANE scores for both injured joints(74.33)and non-injured(83.67)shoulder joints.CONCLUSION The study yielded favorable outcomes for rotator cuff tear repair and Bankart repair.No repair failures were observed,supporting the safety and efficacy of these devices in shoulder injury management.

关节镜辅助下Suture-button弹性固定治疗高位踝关节扭伤

背景:高位踝关节扭伤容易漏诊导致踝关节功能障碍,关节镜检查可发现隐匿性高位踝关节扭伤,采用Suture-button弹性固定能恢复远端胫腓联合的生物力学稳定性。目的:探讨踝关节镜辅助下采用Suture-button弹性固定治疗高位踝关节扭伤的临床疗效。方法:回顾性分析2019年8月至2021年8月武汉市第四医院足踝外科在踝关节镜辅助下进行Suture-button弹性固定治疗的40例高位踝关节扭伤患者的病历资料。所有患者均采用Suture-button弹性固定,记录患者术前及术后末次随访美国矫形外科足踝协会踝-后足功能评分、目测类比疼痛评分、踝关节活动度,将患者术前影像学数据与术中关节镜下分离程度进行相关性分析,按照Meislin标准进行疗效评估并记录术后并发症发生情况。结果与结论:①40例患者术后获16-48个月随访;②术后末次随访美国矫形外科足踝协会踝-后足功能评分为(88.95±6.64)分,目测类比评分为(1.78±1.23)分,踝背伸活动度为(33.50±5.79)°,踝跖屈活动度为(34.50±5.97)°,与术前相比差异均有显著性意义(P<0.05);③影像学分离指标与关节镜下分离程度存在低度正相关(r=0.612,P<0.01);④采用Meislin标准对疗效进行评估,优良率为95%(38/40);术后踝关节疼痛减轻,踝关节自主活动明显改善;⑤随访期间所有患者均未出现神经损伤及切口感染情况;1例患者因术后存在皮肤刺激、下蹲卡顿感取出内固定;⑥提示采取关节镜辅助Suture-button弹性固定治疗高位踝关节扭伤的临床疗效确切,能够更有效地恢复患肢足踝功能,恢复并维持关节稳定性且无需二次取出,值得临床应用。

Moho offset beneath the central Bangong-Nujiang suture of Tibetan Plateau

By analyzing teleseismic waveforms recorded by 53 stations of Hi-Climb profile passing through the central Bangong-Nujiang suture(BNS) ,a total of 4764 high-quality receiver functions are obtained.The average crustal thickness and Poisson's ratio beneath each station are estimated using the travel time of Ps and PpPs of the Moho.The discontinuities such as the Moho,the 410and 660-km interfaces are also studied using the common converted points(CCP) time to depth migration of receiver functions. The main results are as follows:(1) The Moho of Lhasa terrane and that of Qiangtang terrane nearby BNS are overridden and offset by～10 km.The structural geometry shows a northward uplifting and the southward deepening for the Moho of Lhasa terrane and Qiangtang terrane,respectively,which is related to the reactivated structure beneath BNS since Cenozoic era.(2) The variation range of Poisson's ratios along the profile is between 0.237 and 0.280,indicating that the crust is mainly composed of felsic and intermediate rocks.The anti-correlation between the crustal thickness and Poisson's ratio suggests that thicker crust beneath the southern Qiangtang terrane may be related to the successive thrust of felsic and intermediate rock of Lhasa terrane.(3) The thickness of the mantle transition zone along the profile remains about 255 km,implying that the tectonic activities caused by the India-Asia collision are confined to the depths above 410 km.

Suture Button装置修复下胫腓联合损伤的初步报告

[目的]探讨Suture Button装置治疗下胫腓联合损伤后的手术方法及临床效果。[方法]对截止于2007年9月利用Suture Button装置固定的下胫腓联合急、慢性损伤的13例病人进行连续随访观察,通过术后X线片数字化测量和标准的踝足功能评分,评估其疗效并探讨临床应用前景。[结果]除1例病人因术后短期再次创伤意外,行2次手术更换为传统螺钉内固定外,其余病人均在术后6周开始部分负重功能锻炼,术后第3个月功能平均评分达到满意,术后第6、12个月功能平均评分达到优良,X线片未发现内固定失效。[结论]Suture Button装置治疗下胫腓联合损伤具有技术简单、手术时间短、内固定器物理特性符合人体正常解剖生理、固定强度足够、无需2次手术取出等多项优势,可能成为下胫腓联合损伤新的治疗标准。

关节镜下Suture-Bridge线桥技术止点足印重建前交叉韧带撕脱骨折

目的 ：探讨关节镜下复位、Suture-Bridge线桥技术止点足印重建前交叉韧带撕脱骨折的手术方法及临床疗效。方法：2010年3月至2012年9月,对6例膝关节前交叉韧带（ACL）胫骨端止点撕脱骨折患者,在关节镜下行撕脱骨块解剖复位、Suture-Bridge线桥技术ACL止点胫骨端足印重建术。ACL止点撕脱骨折Meyers-Mc KeeverZaricznyj分型：Ⅲ型2例,Ⅳ型4例;其中男2例,女4例;年龄14～52岁,青少年2例,分别为男14岁和女15岁）。术前患膝前抽屉试验及Lachman试验均呈阳性。结果：所有患者获随访,时间均超过2年。术后患膝前抽屉试验及Pivotshift均阴性,无伸膝受限。术后影像学复查示ACL止点撕脱骨折均愈合,骨折复位良好,ACL走行正常。术后3个月及1、2年的Lysholm及IKDC评分均较术前改善。结论 ：关节镜下复位、Suture-Bridge线桥技术止点足印重建前交叉韧带撕脱骨折的手术方式安全有效,实现ACL胫骨止点解剖重建,尤其适用于撕脱骨块碎裂严重或胫骨骨骺未闭合的青少年患者。

Peridotites and Chromitites from the Dingqing Ophiolite in the Eastern Segment of Bangong–Nujiang Suture Zone, Tibet: Occurrence Characteristics and Classifications

The Dingqing ophiolite is located in the eastern segment of the Bangong-Nujiang suture zone. This suture zone is W–E trending parallel with the Yarlung–Zangbo suture zone and is an strategic area for exploring chromite deposits in China. The Dingqign ophiolite is distributed in near SE-NW direction. According to the spatial distribution, the Dingqing ophiolite is sudivided into two massifs, including the East and the West massifs. The Dingqing ophiolite covers an area of nearly 600 km2. This ophiolite is composed of peridotite, pyroxenite, gabbro, diabase, basalt, plagiogranite and chert(Fig. 1). The peridotite is the main lithology of the Dingqing ophiolite. The peridotite covers about 90% of the total area of the Dingqing ophiolite. The Dingqing ophiolite is dominated by harzburgite with a small amounts of dunite. The Dingqing harzburgite displays different textures, such as massive, Taxitic, oriented and spherulitic textures(Fig. 2d–i). These four types of harzburgite occur in both the East and West massifs, especially in the Laraka area of the eastern part of the East massif. Dunites have different occurrences in the field outcrops, such as lenticular or stripshaped, thin-shell and agglomerate varieties(Fig. 2a–c). On the basis of detailed field work, we have discovered 83 chromitite bodies, including 27 in the East massif and 56 in the West massif. According to the occurrence scale and quantity of the chromitite bodies, we have identified four prospecting areas, namely Laraka, Latanguo, Langda and Nazona. Chromitites in the Dingqing ophiolite show different textures, including massive, disseminated, veined and disseminated-banded textures(Fig. 3). On the basis of the Cr#(=Cr/(Cr+Al)×100) of chromite, we have classified the Dingqing chromitite into high-Cr, medium high chromium type, medium chromium type and low chromium type chromitite(Figs. 4, 5). Among them, low chromium type chromitite Cr# is extremely low, ranging from 9.23 to 14.01, with an average of 11.89;TiO2 content is 0.00% to 0.04%, and the average value is 0.01%, which may be a new output type of chromitite. These different types of chromitites have different associations/assemblages of mineral inclusions. The inclusions in high chromium type chromitite are mainly clinopyroxene and a small amount of olivine;medium high chromium chromitite are mainly amphibole, a small amount of clinopyroxene and phlogopite;while low-chromium chromite rarely develops mineral inclusions, and micron-sized clinopyroxene inclusions are common in olivines which are gangue mineral in it. These different types of chromite ore bodies have a certain correspondence with the field output, and may also restrict their genesis. This part will be further developed in the follow-up work.

Suture-anchor锚钉在Weber C型踝关节骨折合并下胫腓联合损伤中的应用

目的 研究Suture-anchor锚钉修复下胫腓前韧带在Weber C型踝关节骨折合并下胫腓联合损伤中的临床应用效果。方法 回顾性分析延安大学附属医院2017年3月至2021年3月间收治的84例Weber C型踝关节骨折合并下胫腓联合损伤患者的临床资料,根据患者下胫腓前韧带修复方法将其分为锚钉组(Suture-anchor锚钉修复,n=39)与螺钉组(皮质骨螺钉内固定,n=45),比较两组患者围术期相关指标、复位质量以及术后6个月美国足踝外科协会(AOFAS)踝足评分系统和踝关节Baird-Jackson功能得分情况。结果 锚钉组患者的手术耗时和术中透视次数分别为(103.69±17.79) min、(14.49±3.36)次,明显短(少)于螺钉组的(126.41±20.15) min和(18.41±4.15)次,差异均具有统计学意义(P<0.05);锚钉组患者的下胫腓联合前间距(ITFACS)为(1.86±0.26) mm,明显短于螺钉组的(2.79±0.32) mm,差异有统计学意义(P<0.05),但两组患者的下胫腓联合后间距(ITFPCS)比较差异无统计学意义(P>0.05);锚钉组患者的骨折愈合时间及术后恢复正常工作时间分别为(3.26±0.43)个月和(3.43±0.63)个月,明显短于螺钉组的(3.61±0.39)个月和(3.79±0.71)个月,差异均有统计学意义(P<0.05);术后6个月,两组患者的Baird-Jackson功能评分系统得分及AOFAS踝足功能量表得分比较差异均无统计学意义(P>0.05);锚钉组患者术后并发症发生率为2.56%,略低于螺钉组的17.78%,但差异无统计学意义(P>0.05)。结论 与皮质骨螺钉内固定比较,带线骨锚钉内固定在治疗Weber C型踝关节骨折合并下胫腓联合损伤中更具优势,其可有效增加下胫腓联合前切迹的解剖复位率,且安全性高。

Suture Endobutton与跖肌腱重建Lisfranc韧带的生物力学对比研究

目的通过Suture Endobutton与跖肌腱重建Lisfranc韧带的生物力学对比研究,评价两种方法对恢复Lisfranc关节稳定性的作用,为临床治疗Lisfranc损伤提供理论依据。方法选取10例成人新鲜尸体小腿标本,依次制备Lisfranc韧带完整模型、损伤模型及损伤后的Suture Endobutton或跖肌腱重建模型,并分别给予轴向或外展载荷,记录内侧楔骨（C1）～第2跖骨（M2）基底的平均位移变化。结果轴向载荷和外展载荷下,完整模型C1～M2的平均位移变化分别为（0.70±0.05）mm、（1.21±0.10）mm,损伤模型为（1.59±0.07）mm、（3.73±0.11）mm,Suture Endobutton重建模型为（0.84±0.04）mm、（1.29±0.06）mm,跖肌腱重建模型为（1.01±0.05）mm、（1.34±0.05）mm。轴向或外展载荷下,完整模型和重建模型C1～M2间位移变化明显小于损伤模型,差异具有统计学意义（P〈0.05）;重建模型的位移变化略大于完整模型,但差异无统计学意义（P〉0.05）;Suture Endobutton与跖肌腱重建模型之间位移变化相似,差异无明显统计学意义（P〉0.05）;任一模型外展载荷时的C1～M2位移变化大于轴向载荷。结论 （1）在恢复Lisfranc关节稳定性上,Suture Endobutton与跖肌腱的重建方法提供的生物力学强度相似;（2）相对于轴向载荷的位移变化,外展载荷的实验结果差异更加明显,推荐使用外展载荷进行Lisfranc关节相关力学试验。

V-Locsutures与普通可吸收线在后腹腔镜肾部分切除术中应用比较

目的:比较V-Loc sutures与普通可吸收线在后腹腔镜肾癌部分切除术中的应用价值。方法:2012年5月-2013年6月,本手术组共收治了25例确诊的病理分期为T1N0M0的肾癌患者,其中12例术中肾脏创面缝合均采用V-Loc sutures,其中男9例,女3例,年龄28-68岁,平均48.2岁;肿瘤大小为0.9-4.7cm,平均2.8cm;另13例术中采用普通可吸收线缝合创面,其中男8例,女5例,年龄34-74岁,平均45.5岁;肿瘤大小为1.2-4.5cm,平均2.6cm;比较两组患者手术中的手术时间、术中出血量、肾动脉阻断时间、创面缝合时间、各组手术前后测血肌酐、胱抑素C变化,术后并发症。结果:25例手术均在后腹腔镜下顺利完成。V-Loc sutures组和普通可吸收线组手术时间、术中出血、肾动脉阻断时间、肾创面缝合时间均有差异(P<0.05);V-Loc sutures组手术前后血肌酐、胱抑素C无明显差异(P>0.05),普通可吸收线组手术前后血肌酐、胱抑素C有差异(P<0.05);V-Loc sutures组出现1例血尿,普通可吸收线组出现1例漏尿。结论:V-Loc sutures较普通可吸收线可缩短手术时间及肾创面缝合时间,减少术中出血,更好的保护小肾癌患者的肾功能。