Based on the data of regional geology,seismic,drilling,logging and production performance obtained from 94 major petroliferous basins worldwide,the global coal resources were screened and statistically analyzed.Then,u...Based on the data of regional geology,seismic,drilling,logging and production performance obtained from 94 major petroliferous basins worldwide,the global coal resources were screened and statistically analyzed.Then,using established definition methods and evaluation criteria for coal-rock gas in China,and by analogy with the tectono-sedimentary and burial-thermal evolution conditions of coal rocks in sedimentary basins within China,the geological resource potential of global coal-rock gas was estimated mainly by the volume method,partly by the volumetric method in selected regions.According to the evaluation indicator system comprising 14 parameters under 5 categories and the associated scoring criteria,the target basins were ranked,and the future research targets for these basins were proposed.The results reveal that,globally,coal rocks are primarily formed in four types of swamp environments within four categories of prototype basins,and distributed across five major coal-forming periods and eight coal-accumulation belts.The total geological coal resources are estimated at approximately 42×10^(12)t,including 22×10^(12)t in the strata deeper than 1500 m.The global geological coal-rock gas resources in deep strata are roughly 232×10^(12)m^(3),of which over 90%are endowed in Russia,Canada,the United States,China and Australia,with China contributing 24%.The top 10 basins by coal-rock gas resource endowment,i.e.Alberta,Kuznetsk,Ordos,East Siberian,Bowen,West Siberian,Sichuan,South Turgay,Lena-Vilyuy and Tarim,collectively hold 75%of the global total.The Permian,Cretaceous,Carboniferous,Jurassic,and Paleogene-Neogene account for 32%,30%,18%,10%,and 7%of total coal-rock gas resources,respectively.The 10 most practical basins for future coal-rock gas exploration and development are identified as Alberta,Ordos,Kuznetsk,San Juan,Sichuan,East Siberian,Rocky Mountain,Bowen,Junggar and Qinshui.Propelled by successful development practices in China,coal-rock gas is now entering a phase of theoretical breakthrough,technological innovation,and rapid production growth,positioning it to spearhead the next wave of the global unconventional oil and gas revolution.展开更多
目的:总结外侧半月板前角-前体部损伤的临床分型及相应手术策略并评估治疗效果。方法:回顾性分析2020年1月至2020年12月收治的87例外侧半月板前角-前体部损伤患者病例资料,总结撕裂类型和手术策略,根据术前和末次随访的国际膝关节评分...目的:总结外侧半月板前角-前体部损伤的临床分型及相应手术策略并评估治疗效果。方法:回顾性分析2020年1月至2020年12月收治的87例外侧半月板前角-前体部损伤患者病例资料,总结撕裂类型和手术策略,根据术前和末次随访的国际膝关节评分委员会(IKDC)评分和Lysholm膝关节评分评估治疗效果。结果:前角-前体部损伤占所有外侧半月板损伤的10.8%。依据撕裂类型将外侧半月板前角-前体部损伤分为5型,其中Ⅰ型为复合撕裂,表现为水平撕裂合并某一层垂直撕裂,并根据垂直撕裂的部位分为Ⅰa、Ⅰb、Ⅰc三种亚型;Ⅱ型为水平撕裂;Ⅲ型为垂直撕裂,并根据移位情况和形态分为Ⅲa、Ⅲb、Ⅲc三种亚型;Ⅳ型为松散型,发生在前角;Ⅴ型为缺失型,半月板前角-前体部消磨殆尽。对于常规手术入路无法处理的Ⅰb型和Ⅱ型损伤,附加外下入路进行操作并视情况进行Outside-in缝合。87例患者均获得随访,平均随访25.1±5.7月(19~31月)。末次随访时IKDC评分和Lysholm评分均显著高于术前(分别为64.5±7.4 vs 84.3±6.9和73.3±5.1 vs 90.1±5.0,均P<0.05)。结论:基于不同分型采取相应手术策略是治疗外侧半月板前角-前体部损伤的有效方法。展开更多
目的:探究多间室和内侧单间室严重骨关节炎(OA)患者内侧半月板突出(MME)及内侧半月板后根撕裂(MMPRT)的特点。方法:回顾性分析2020年6月至2021年11月我科收治的117例终末期OA患者的基线资料、X线和磁共振(MRI)图像,其中多间室严重OA患...目的:探究多间室和内侧单间室严重骨关节炎(OA)患者内侧半月板突出(MME)及内侧半月板后根撕裂(MMPRT)的特点。方法:回顾性分析2020年6月至2021年11月我科收治的117例终末期OA患者的基线资料、X线和磁共振(MRI)图像,其中多间室严重OA患者60例67膝(M-OA组),均行全膝关节置换;内侧单间室严重OA患者57例68膝(mU-OA组),均行内侧单髁置换。在MRI上测量患膝MME程度,判定是否存在MMPRT,并在X线片上测量髋膝踝角(HKA)、胫骨近端内侧角(MPTA)、机械轴股骨远端外侧角(mLDFA)、胫股关节线夹角(JLCA),在MRI上测量内侧胫骨平台后倾角(mPTS)。对基线资料、病理性MME和MMPRT发生率、MME程度、HKA、MPTA、mLDFA、JLCA和m PTS进行统计学分析。结果:两组患者年龄、体质指数(BMI)和患膝侧别等无显著性差异(P>0.05),M-OA组患者女性比例高于mU-OA组(78.33%vs 56.14%,P<0.05)。M-OA组病理性MME发生率高于m U-OA组(79.1%vs52.94%,P<0.01),且MME程度显著大于mU-OA组(4.72±1.88 mm vs 3.24±1.25 mm,P<0.01)。MOA组HKA和JLCA显著大于mU-OA组(分别为10.7°±4.5°vs 7.5°±2.3°,P<0.01;-4.3°±1.8°vs-2.1°±0.9°,P<0.05)。两组间MMPRT发生率、MPTA、mLDFA和m PTS无差异(P>0.05)。结论:多间室严重骨关节炎患者的内侧半月板突出程度和病理性内侧半月板突出发生率较高,女性比例高、髋膝踝角和胫股关节线夹角的角度大可能是其原因。展开更多
基金Supported by the China National Science and Technology Major Project on New-Type Oil and Gas Exploration and Development(2025ZD1404200,2025ZD1400800)PetroChina Science and Technology Project(2023ZZ07)。
文摘Based on the data of regional geology,seismic,drilling,logging and production performance obtained from 94 major petroliferous basins worldwide,the global coal resources were screened and statistically analyzed.Then,using established definition methods and evaluation criteria for coal-rock gas in China,and by analogy with the tectono-sedimentary and burial-thermal evolution conditions of coal rocks in sedimentary basins within China,the geological resource potential of global coal-rock gas was estimated mainly by the volume method,partly by the volumetric method in selected regions.According to the evaluation indicator system comprising 14 parameters under 5 categories and the associated scoring criteria,the target basins were ranked,and the future research targets for these basins were proposed.The results reveal that,globally,coal rocks are primarily formed in four types of swamp environments within four categories of prototype basins,and distributed across five major coal-forming periods and eight coal-accumulation belts.The total geological coal resources are estimated at approximately 42×10^(12)t,including 22×10^(12)t in the strata deeper than 1500 m.The global geological coal-rock gas resources in deep strata are roughly 232×10^(12)m^(3),of which over 90%are endowed in Russia,Canada,the United States,China and Australia,with China contributing 24%.The top 10 basins by coal-rock gas resource endowment,i.e.Alberta,Kuznetsk,Ordos,East Siberian,Bowen,West Siberian,Sichuan,South Turgay,Lena-Vilyuy and Tarim,collectively hold 75%of the global total.The Permian,Cretaceous,Carboniferous,Jurassic,and Paleogene-Neogene account for 32%,30%,18%,10%,and 7%of total coal-rock gas resources,respectively.The 10 most practical basins for future coal-rock gas exploration and development are identified as Alberta,Ordos,Kuznetsk,San Juan,Sichuan,East Siberian,Rocky Mountain,Bowen,Junggar and Qinshui.Propelled by successful development practices in China,coal-rock gas is now entering a phase of theoretical breakthrough,technological innovation,and rapid production growth,positioning it to spearhead the next wave of the global unconventional oil and gas revolution.
文摘目的:探讨肥胖对膝单髁置换术(unicompartmental knee arthroplasty,UKA)治疗膝关节内侧间室骨关节炎疗效和安全性的影响。方法:回顾性分析2020年1月至2022年1月采用UKA治疗的64例膝关节内侧间室骨关节炎患者的病例资料,其中体质量指数≥28 kg·m-2者(肥胖组)和体质量指数<28 kg·m-2者(非肥胖组)各32例。比较2组患者的手术时间、术后住院时间、术中出血量、术后引流量、膝关节疼痛视觉模拟量表(visual analogue scale,VAS)评分、美国特种外科医院(Hospital for Special Surgery,HSS)膝关节评分、膝关节屈伸活动度及并发症发生率。结果:①围手术期指标。2组患者手术时间、术中出血量、术后引流量、术后住院时间的组间差异均无统计学意义(t=0.924,P=0.562;t=0.525,P=0.692;t=0.324,P=0.747;t=0.557,P=0.112)。②膝关节疼痛VAS评分。末次随访时,2组患者的膝关节疼痛VAS评分均较术前降低(t=34.765,P=0.000;t=29.764,P=0.000),且肥胖组的评分高于非肥胖组(t=9.351,P=0.035)。③HSS膝关节评分。末次随访时,2组患者的HSS膝关节评分均较术前提高(t=21.771,P=0.000;t=32.493,P=0.000),且肥胖组的评分低于非肥胖组(t=15.386,P=0.013)。④膝关节屈伸活动度。末次随访时,2组患者的膝关节屈伸活动度均较术前增大(t=21.933,P=0.000;t=26.482,P=0.000),且肥胖组的屈伸活动度小于非肥胖组(t=9.739,P=0.027)。⑤并发症发生率。肥胖组3例发生切口持续渗出、3例发生下肢深静脉血栓形成、2例发生假体无菌性松动,非肥胖组2例发生下肢深静脉血栓形成、1例发生假体无菌性松动。切口持续渗出者,经积极换药和抗感染治疗后切口渗出情况得到控制;下肢深静脉血栓形成者,给予抗凝药物对症处理后症状缓解;假体无菌性松动者,行全膝置换术后症状缓解。2组并发症发生率的差异无统计学意义(χ^(2)=2.744,P=0.098)。结论:肥胖会影响UKA治疗膝关节内侧间室骨关节炎的疗效,但对其安全性无明显影响。
文摘目的:总结外侧半月板前角-前体部损伤的临床分型及相应手术策略并评估治疗效果。方法:回顾性分析2020年1月至2020年12月收治的87例外侧半月板前角-前体部损伤患者病例资料,总结撕裂类型和手术策略,根据术前和末次随访的国际膝关节评分委员会(IKDC)评分和Lysholm膝关节评分评估治疗效果。结果:前角-前体部损伤占所有外侧半月板损伤的10.8%。依据撕裂类型将外侧半月板前角-前体部损伤分为5型,其中Ⅰ型为复合撕裂,表现为水平撕裂合并某一层垂直撕裂,并根据垂直撕裂的部位分为Ⅰa、Ⅰb、Ⅰc三种亚型;Ⅱ型为水平撕裂;Ⅲ型为垂直撕裂,并根据移位情况和形态分为Ⅲa、Ⅲb、Ⅲc三种亚型;Ⅳ型为松散型,发生在前角;Ⅴ型为缺失型,半月板前角-前体部消磨殆尽。对于常规手术入路无法处理的Ⅰb型和Ⅱ型损伤,附加外下入路进行操作并视情况进行Outside-in缝合。87例患者均获得随访,平均随访25.1±5.7月(19~31月)。末次随访时IKDC评分和Lysholm评分均显著高于术前(分别为64.5±7.4 vs 84.3±6.9和73.3±5.1 vs 90.1±5.0,均P<0.05)。结论:基于不同分型采取相应手术策略是治疗外侧半月板前角-前体部损伤的有效方法。
文摘目的:探究多间室和内侧单间室严重骨关节炎(OA)患者内侧半月板突出(MME)及内侧半月板后根撕裂(MMPRT)的特点。方法:回顾性分析2020年6月至2021年11月我科收治的117例终末期OA患者的基线资料、X线和磁共振(MRI)图像,其中多间室严重OA患者60例67膝(M-OA组),均行全膝关节置换;内侧单间室严重OA患者57例68膝(mU-OA组),均行内侧单髁置换。在MRI上测量患膝MME程度,判定是否存在MMPRT,并在X线片上测量髋膝踝角(HKA)、胫骨近端内侧角(MPTA)、机械轴股骨远端外侧角(mLDFA)、胫股关节线夹角(JLCA),在MRI上测量内侧胫骨平台后倾角(mPTS)。对基线资料、病理性MME和MMPRT发生率、MME程度、HKA、MPTA、mLDFA、JLCA和m PTS进行统计学分析。结果:两组患者年龄、体质指数(BMI)和患膝侧别等无显著性差异(P>0.05),M-OA组患者女性比例高于mU-OA组(78.33%vs 56.14%,P<0.05)。M-OA组病理性MME发生率高于m U-OA组(79.1%vs52.94%,P<0.01),且MME程度显著大于mU-OA组(4.72±1.88 mm vs 3.24±1.25 mm,P<0.01)。MOA组HKA和JLCA显著大于mU-OA组(分别为10.7°±4.5°vs 7.5°±2.3°,P<0.01;-4.3°±1.8°vs-2.1°±0.9°,P<0.05)。两组间MMPRT发生率、MPTA、mLDFA和m PTS无差异(P>0.05)。结论:多间室严重骨关节炎患者的内侧半月板突出程度和病理性内侧半月板突出发生率较高,女性比例高、髋膝踝角和胫股关节线夹角的角度大可能是其原因。
