Pressure stimulated current in progressive failure process of combined coal-rock under uniaxial compression:Response and mechanism

Effective monitoring of the structural health of combined coal-rock under complex geological conditions by pressure stimulated currents(PSCs)has great potential for the understanding of dynamic disasters in underground engineering.To reveal the effect of this way,the uniaxial compression experiments with PSC monitoring were conducted on three types of coal-rock combination samples with different strength combinations.The mechanism explanation of PSCs are investigated by resistivity test,atomic force microscopy(AFM)and computed tomography(CT)methods,and a PSC flow model based on progressive failure process is proposed.The influence of strength combinations on PSCs in the progressive failure process are emphasized.The results show the PSC responses between rock part,coal part and the two components are different,which are affected by multi-scale fracture characteristics and electrical properties.As the rock strength decreases,the progressive failure process changes obviously with the influence range of interface constraint effect decreasing,resulting in the different responses of PSC strength and direction in different parts to fracture behaviors.The PSC flow model is initially validated by the relationship between the accumulated charges of different parts.The results are expected to provide a new reference and method for mining design and roadway quality assessment.

Analytical determination of flow resistance characteristic for combination channel inside hydraulic manifold block

Computational fluid dynamics(CFD)was used in conjunction with BP neural network to study theflow resistance characteristic of the combination-channel inside hydraulic manifold block(HMB).The in-put parameters of the combination-channel model were confirmed to have effect on the pressure-drop bythe numerical method,and a BP neural network model was accordingly constructed to predict the channelpressure-drops.The flow resistance characteristic curves of various channels were achieved,and a perfor-mance parameter was given to evaluate the through-flow characteristic of the channel according to thecurves.The predictions are' in agreement with the numerical computation,indicating that the method canbe utilized to accurately determine the flow characteristic of the combination channel with high efficiency.

An Optimized Convolutional Neural Network with Combination Blocks for Chinese Sign Language Identification

(Aim)Chinese sign language is an essential tool for hearing-impaired to live,learn and communicate in deaf communities.Moreover,Chinese sign language plays a significant role in speech therapy and rehabilitation.Chinese sign language identification can provide convenience for those hearing impaired people and eliminate the communication barrier between the deaf community and the rest of society.Similar to the research of many biomedical image processing(such as automatic chest radiograph processing,diagnosis of chest radiological images,etc.),with the rapid development of artificial intelligence,especially deep learning technologies and algorithms,sign language image recognition ushered in the spring.This study aims to propose a novel sign language image recognition method based on an optimized convolutional neural network.(Method)Three different combinations of blocks:Conv-BN-ReLU-Pooling,Conv-BN-ReLU,Conv-BN-ReLU-BN were employed,including some advanced technologies such as batch normalization,dropout,and Leaky ReLU.We proposed an optimized convolutional neural network to identify 1320 sign language images,which was called as CNN-CB method.Totally ten runs were implemented with the hold-out randomly set for each run.(Results)The results indicate that our CNN-CB method gained an overall accuracy of 94.88±0.99%.(Conclusion)Our CNN-CB method is superior to thirteen state-of-the-art methods:eight traditional machine learning approaches and five modern convolutional neural network approaches.

Effects of water intrusion and loading rate on mechanical properties of and crack propagation in coal–rock combinations

Tackling the problems of underground water storage in collieries in arid regions requires knowledge of the effect of water intrusion and loading rate on the mechanical properties of and crack development in coal–rock combinations. Fifty-four coal–rock combinations were prepared and split equally into groups containing different moisture contents(dry, natural moisture and saturated) to conduct acoustic emission testing under uniaxial compression with loading rates ranging from 0.1 mm/min to 0.6 mm/min. The results show that the peak stress and strength-softening modulus, elastic modulus, strain-softening modulus, and post-peak modulus partly decrease with increasing moisture content and loading rate. In contrast, peak strain increases with increasing moisture content and fluctuates with rising loading rate. More significantly, the relationship between stiffness and stress, combined with accumulated counts of acoustic emission, can be used to precisely predict all phases of crack propagation. This is helpful in studying the impact of moisture content and loading rate on crack propagation and accurately calculating mechanical properties. We also determined that the stress thresholds of crack closure, crack initiation, and crack damage do not vary with changes of moisture content and loading rate, constituting 15.22%, 32.20%, and 80.98% of peak stress, respectively. These outcomes assist in developing approaches to water storage in coal mines, determining the necessary width of waterproof coal–rock pillars, and methods of supporting water-enriched roadways, while also advances understanding the mechanical properties of coal–rock combinations and laws of crack propagation.

Effects of combined spinal-epidural anesthesia on anxiety,labor analgesia and motor blocks in women during natural delivery

BACKGROUND The background of this study was analgesia in natural delivery.The combined spinal-epidural anesthesia has obvious analgesic effect on the parturients in natural labor,and combined spinal-epidural anesthesia has been widely used in anesthesia for various diseases.AIM To study the effects of combined spinal-epidural anesthesia on anxiety,labor analgesia,and motor blocks in parturients during natural delivery.METHODS A total of 120 women who gave birth at Changning District Maternal and Child Health Hospital between December 2021 to December 2022 were included;a random number table approach was employed to divide the women into a control group and a joint group,with each group consisting of 60 women.The control group was given epidural anesthesia,while the joint group was given combined spinal-epidural anesthesia.The visual analog scale(VAS)was used to evaluate the degree of maternal pain.Comparisons were made between the two groups’conditions of childbirth and the duration of labor.Apgar scores were used to evaluate the status of the newborns at birth;Self-rating Anxiety Scale(SAS)and General Self-Efficacy Scale(GSES)scores,umbilical artery blood gas analysis indices and stress indices were compared between the two groups;and the frequencies of motor block and postpartum complications were analyzed.RESULTS In comparison to the control group,in the joint group,the VAS scores for the first,second,and third stages of labor were lower(P<0.05).The rates of conversion to cesarean section and postpartum blood loss in the joint group were lower than those in the control group(P<0.05).No significant differences were observed in the Apgar score,the duration of the first stage of labor,or the total duration of labor between the two groups(P>0.05).The second and third stages of labor in the joint group were shorter than those in the control group(P<0.05).When compared to the control group,the postpartum SAS score of the joint group was lower,while the GSES score was greater(P<0.05).Between the control group and the joint group,the differences observed in pH,arterial carbon dioxide partial pressure,arterial oxygen partial pressure,or arterial hydrogen ion concentration were not significant(P>0.05).Nitric oxide,cortisol,and adrenaline levels were lower in the joint group than in the control group(P<0.05).There were no substantial differences in Bromage grade or rate of complications between the two groups(P>0.05).CONCLUSION For parturients during natural delivery,combined spinal-epidural anesthesia can reduce anxiety,provide labor analgesia,shorten labor time,and reduce postoperative stress levels but did not result in a motor block.

Effect of epidural block combined intravenous general anesthesia stress on the stress response and T lymphocyte subsets in patients with breast cancer undergoing radical mastectomy

Objective: To investigate the effect of epidural block combined with intravenous anesthesia on stress response and T lymphocyte subsets in patients with breast cancer undergoing radical mastectomy. Methods: In our hospital from July 2016 to June 2017 undergoing radical mastectomy for breast cancer of 88 patients were randomly divided into observation group and control group of 44 cases, 2 patients underwent routine preoperative preparation, and routine blood pressure, heart rate, pulse, oxygen saturation, ECG monitoring, control group with intravenous anesthesia. The observation group was treated with epidural block combined with intravenous anesthesia. 2 groups of patients before anesthesia, 30 MIM (T0), 1 h after skin incision (T1), 4 h after operation (T2), 24 h after operation (T3), 48 h after operation (T4) from peripheral venous blood were measured by interleukin-8 (IL-8) and interferon gamma (IFN-γ), cortisol (Cor), prolactin (PRL), growth hormone (GH) and T lymphocyte subsets (CD3+, CD4+, CD8+), the calculation of CD4+/CD8+ value. Results: the serum IL-8 level of T1, T2, T3and T4 decreased gradually, were lower than at T0, and the control group at each time point had no significant difference, T1, T2, T3group, T4IL-8 levels lower than the control group;the 2 groups of serum IFN-γ levels T1 and T2had no significant change, T3and T4increased gradually, was higher than that of T0, but no significant difference between the 2 groups of IFN-γ levels. 2 serum Cor levels peaked at T1, decreased at T2, was higher than that of T0, T3, T4returned to T0, the observation group T1, T2Cor level lower than the control group;the serum PRL levels of 2 groups reached a peak at T1, T2, T3at the time of T4decreased gradually, was higher than that of T0, T1, T2, T3of the observation group at the PRL level is lower than the control group;the serum level of GH 2 in group T1increased gradually, reached a peak at T2, T3and T4 decreased gradually, was higher than that of T0, the observation group T1, T2, T3, T4, GH levels lower than the control group. 2 groups of CD3+ decreased gradually in T1, T2, were lower than T0, T3, T4returned to T0, the observation group T1, T2CD3+ was higher than the control group;group CD4+ decreased gradually in T1, T2, T3and T4were lower than control, T0when, and the observation group CD4+ in T1, T2, T3, T4, no significant changes were observed in group T1, T2, T3, T4and CD4+ higher than that of the control group;the 2 group CD8+ had no obvious changes in T1, T2, T3, T4;observation group CD4+/CD8+ decreased gradually in T1, T2, were lower than T0, T3, T4returned to T0, the observation group T1, T2CD4+/CD8+ was higher than the control group. Conclusion: epidural block combined with intravenous anesthesia for breast cancer radical mastectomy can effectively relieve the stress and inflammatory reaction, alleviate the immunosuppression, and help to restore the postoperative immune function.

Reasonable location parameters of pick and nozzle in combined cutting system

The drum shearer and high pressure water jet combined cutting system is an effective technology to cut hard coal-rock, but one problem of the technology is the choice of pick and nozzle location parameters. In order to solve the problem, the process and mechanism of combined cutting arc studied and mining seepage catastrophe theory is used to construct the mathematic and physical model of combined cutting hard coal-rock. Based on the model and detailed analysis of combined cutting mechanism, the single pick and nozzle combined cutting test-bed is built to test the main pick and nozzle location parameters of drum shearer and water jet combined cutting system. Test results show that the best vertical distance between the pick-tip and nozzle center point is the sum of cutting thickness and proper target distance in the Y axial direction; the best horizontal distance is the length between pick-tip point and coal-rock surface bursting crack point in the X axial direction. The best incident angle of water jet should be the same as the bursting crack line＇s angle in theory, but considering other important factors comprehensively, it is more reasonable when the incident angle of water jet is 90°.

Optimization principle of combined surface and underground mining and its applications

The pit limit optimization is discussed, which is one of the most important problems in the combined min-ing method, on the basis of the economic model of ore-blocks. A new principle of the limit optimization is put for-ward through analyzing the limitations of moving cone method under such conditions. With a view to recovering asmuch mineral resource as possible and making the maximum profit from the whole deposit, the new principle is tomaximize the sum of gain from both open-pit and underground mining. The mathematical models along the horizon-tal and vertical directions and modules for software package (DM&MCAD) have been developed and tested inTonglushan Copper Mine. It has been proved to be rather effective in the mining practice.

Seventy Cases of External Humeral Epicondylitis Treated by Local Blocking and Massotherapy

External humeral epicondylitis or tennis elbow, is a commonly encountered disease in orthopaedics and traumatology. The curative effect is not satisfactory as far as its treatment by western and traditional Chinese medicine is concerned, which has a long course of treatment and a high recurrent rate. 70 cases of external humeral epicondylitis were treated by massotherapy after local blocking from August 1995 to October 1997 at this hospital with satisfactory therapeutic effects.Clinical DataOf the 70 cases in this series treated by massotherapy after local blocking, 30 were males and 40 females, ranging in age from 19 to 65 years. 55 cases were 30 to 50 years old, 20 had the left elbow affected and 50 the right elbow. 7 cases had a history of trauma, 50 a history of chronic strain, and 13 the cause unknown. The shortest duration of disease was 15 days and the longest 24 months.Among 50 cases in the control group treated by massotherapy, 20 cases were males and 30 females, ranging in age from 16 to 58 years. 40 cases were 30 to 50 years old. 15 cases were affected on the left elbow and 35 on the right elbow. 6 cases had a history of trauma, 32 a history of chronic strain, and 12 the cause unknown. The shortest duration of diseases was 7 days and the longest 22 months.

髂筋膜阻滞复合腰硬联合麻醉 在老年髋部骨折患者中的应用效果评价

目的:探究髂筋膜阻滞复合腰硬联合麻醉在老年髋部骨折患者中的应用效果。方法:将盱眙县中医院麻醉科收治的老年髋部骨折患者80例(收治时间2021年2月—2023年2月)作为研究对象,随机分为两组,每组40例。两组均实施手术治疗,对照组实施腰硬联合麻醉,观察组实施髂筋膜阻滞复合腰硬联合麻醉。比较两组麻醉效果。结果:术前,两组简易精神状态评价量表(MMSE)评分对比,差异无统计学意义(P>0.05);术后6 h、1 d、3 d,两组MMSE评分升高,且观察组均高于对照组(P<0.05)。观察组手术时间短于对照组,舒芬太尼用量少于对照组(P<0.05)。术前,两组视觉模拟评分法(VAS)评分对比,差异无统计学意义(P>0.05);术后6 h、1 d、3 d,两组VAS评分降低,且观察组均低于对照组(P<0.05)。两组麻醉效果相比,差异无统计学意义(P>0.05)。结论:老年髋部骨折患者实施腰硬联合麻醉复合髂筋膜阻滞,能够改善患者术后认知功能,减轻疼痛,缩短手术时间,减少舒芬太尼用量。

神经刺激仪引导下腰丛联合骶丛神经阻滞麻醉在股骨颈骨折患者中的应用

目的:探讨在股骨颈骨折患者中应用神经刺激仪引导下腰丛联合骶丛神经阻滞麻醉的效果。方法:选取2020年1月—2023年6月桂林市中医医院收治的98例股骨颈骨折患者作为研究对象,按照随机数表法将其分为对照组和研究组,各49例。对照组采用传统的腰硬联合麻醉,研究组采用神经刺激仪引导下腰丛联合骶丛神经阻滞麻醉。比较两组麻醉效果、平均动脉压(MAP)、心率(HR)、皮质醇(Cor)和儿茶氨酚(CA)及不良反应。结果:两组麻醉效果比较,差异无统计学意义(P>0.05)。研究组麻醉后15 min(T_(2))、麻醉后30 min(T_(3))时MAP高于对照组,差异有统计学意义(P<0.05);研究组麻醉后5 min(T_(1))、T_(2)、T_(3)、手术结束后(T_(4))时HR高于对照组,差异有统计学意义(P<0.05)。研究组术中(Tb)时CA、Cor低于对照组,差异有统计学意义(P<0.05)。两组不良反应发生率比较,差异无统计学意义(P>0.05)。结论:股骨颈骨折患者应用神经刺激仪引导下腰丛联合骶丛神经阻滞麻醉能稳定血流动力学,缓解应激反应,具有良好的麻醉效果和较高的安全性。

腰硬联合麻醉复合髋关节囊周围神经阻滞在老年髋部骨折患者中的应用效果

目的分析老年髋部骨折患者联合腰硬复合麻醉、髋关节囊周围神经阻滞的作用。方法非随机选取2021年1月—2023年1月新疆生产建设兵团第十三师红星医院收治的120例老年髋部骨折患者为研究对象,均予以外科手术治疗,按照不同麻醉方式分为两组,各60例。对照组采取腰硬联合麻醉,观察组采取腰硬联合麻醉复合髋关节囊周围神经阻滞,比较两组患者应用效果。结果观察组术后中枢神经特异蛋白、β-淀粉样蛋白1-40水平分别为(94.28±13.23)mg/L、(6.52±0.94)mg/L,均较对照组的(130.54±23.89)mg/L、(9.81±1.55)mg/L低,差异有统计学意义(t=9.044、7.837,P均<0.05);观察组术后2、4、6、12 h的VAS评分较对照组低,差异有统计学意义(P均<0.05)。结论联合腰硬复合麻醉、髋关节囊周围神经阻滞用于老年髋部骨折患者,能够减轻患者术后疼痛,并降低术后中枢神经系统的损伤。

橡胶砂芯组合砌块应用于泸定地震倒塌房屋隔震研究

该文采用有限元软件对一种适用于村镇房屋隔震的橡胶砂芯组合砌块(rubber-sand mixture cored composite block,RSMCB),在已有振动台试验的基础上进行隔震响应还原模拟。然后在MOXI波和Turkey波输入工况下,对四川省甘孜州泸定县6.8级地震中发生跪坐倒塌的某砖混结构办公楼,进行铺设橡胶砂芯组合砌块前后的地震动响应模拟,对层间位移和层间剪力进行对比分析,得出以下结论:输入加速度在经过橡胶砂芯组合砌块垫层过滤后均有一定程度的下降,其对高频振动频率的衰减过滤是其主要的隔震机理;模拟结果与试验所得误差较小,充分验证数值建模方法的正确性以及子程序本构关系的可靠性;铺设RSMCB的办公楼结构的加速度反应、层间位移和层间剪力较未铺设RSMCB结构模型明显减小,层间位移以底部隔震层最大,XYZ输入工况下,铺设RSMCB的上部结构的响应最大;RSMCB的对房屋的隔震作用十分显著且满足在村镇欠发达地区的低成本隔震需求。在实施农村发展的过程中表现出良好的应用前景。橡胶砂芯组合砌块取材便捷造价低廉,隔震效果显著,可作为一种低成本的长寿命隔震技术。

股神经阻滞联合关节腔浸润麻醉在膝关节镜手术中的应用效果

目的评价股神经阻滞联合关节腔浸润麻醉在膝关节镜手术中的安全性和有效性。方法选择滨州医学院附属医院骨关节外科2022年1月至6月因半月板损伤、游离体、骨性关节炎计划行单侧膝关节镜手术患者120例,随机分为股神经阻滞联合关节腔浸润麻醉组(F/I组)和腰硬联合麻醉组(CSEA组),每组60例。F/I组中男32例,女28例,年龄(38.75±11.35)岁;CSEA组中男25例,女35例,年龄(37.80±10.85)岁。比较两组术中补救例数、术后视觉模拟评分法(VAS)评分、术后感觉恢复时间及首次下地活动时间、术后并发症、住院花费及住院天数等指标的差异。采用t检验、χ^(2)检验、Fisher确切概率法。结果F/I组术后6 h VAS评分低于CSEA组[(2.08±0.61)分比(2.54±0.64)分],差异有统计学意义(t=-2.484,P=0.018)。F/I组感觉恢复时间长于CSEA组[(6.25±0.40)h比(3.60±0.31)h,首次下地活动时间短于CESA组[(2.99±1.05)h比(8.14±1.88)h],差异均有统计学意义(t=14.095、-12.263,均P<0.001)。术后并发症:F/I组术中加用麻醉发生率3.3%(2/60)、尿潴留发生率0、下肢静脉血栓发生率1.7%(1/60)、恶心呕吐发生率3.3%(2/60),CSEA组术中加用麻醉发生率0、尿潴留发生率10.0%(6/60)、下肢静脉血栓发生率5.0%(3/60)、恶心呕吐发生率16.7%(10/60),两组尿潴留、恶心呕吐发生率比较差异均有统计学意义(均P<0.05)。F/I组住院时间为(3.90±0.63)d、住院费用为(9612.67±507.15)元,CESA组分别为(5.27±0.75)d、(11401.52±530.01)元,差异均有统计学意义(t=-8.862、-15.425,均P<0.001)。结论股神经阻滞联合关节腔浸润麻醉在膝关节镜手术中能够减少术后并发症、缩短住院时间、降低住院费用,并提供良好的麻醉效果。

分析星状神经节阻滞对老年髋关节置换术患者术后睡眠及谵妄的影响

目的:研究星状神经节阻滞(SGB)对老年髋关节置换术(THA)患者术后睡眠及谵妄的影响。方法:选取2020年1月至2023年3月福建省泉州市惠安县医院内行髋关节置换术的老年患者84例作为研究对象,按照随机数字表法分为对照组和观察组,每组42例,2组均行腰硬联合阻滞麻醉,观察组同时行右侧星状神经节阻滞治疗。比较2组患者的术中情况,记录2组手术时间、术中出血量、术中输液量,采用匹兹堡睡眠质量指数(PSQI)比较2组患者干预前后睡眠质量的变化,采用视觉模拟评分法(VAS)比较2组患者干预前后的疼痛感受,并比较2组患者术后睡眠障碍(POSD)及术后谵妄(POD)的发生率。结果:观察组术后当天、术后第1天的PSQI得分显著低于对照组,观察组在术后当天、术后第1天的POSD发生率和POD发生率均显著低于对照组,观察组在术后当天、术后第1天的VAS评分显著低于对照组,差异有统计学意义(P<0.05)。结论:SGB在老年THA中的应用效果显著,可有效改善患者睡眠质量,对降低POSD、POD发生率有积极作用,并减轻了术后疼痛,有利于加快康复进程,值得推广应用。

小剂量轻比重腰-硬联合麻醉和股神经及坐骨神经阻滞麻醉在老年创伤性下肢骨折患者内固定术中的应用对比

目的探究小剂量轻比重腰-硬联合麻醉和股神经及坐骨神经阻滞麻醉在老年创伤性下肢骨折(TLEF)患者内固定术中的应用效果。方法随机选取南阳市中心医院在2020年5月至2022年5月收治的80例老年TLEF患者作为本次研究对象,用随机数字法将其分为对照组(40例)和研究组(40例)。两组患者均行内固定术治疗,对照组术中行小剂量轻比重腰-硬联合麻醉;研究组术中行股神经及坐骨神经阻滞麻醉。比较两组麻醉效果、生命体征变化、凝血功能、术后不良反应、术后恢复情况。结果两组麻醉起效时间、完全麻醉时间、感觉神经完全麻醉时间、运动神经完全麻醉时间比较,差异无统计学意义(P>0.05)。麻醉后,两组心率(HR)和平均动脉压(MAP)水平均低于麻醉前(P<0.05),两组麻醉后HR和MPA水平比较,差异无统计学意义(P>0.05)。术后,两组凝血酶时间(TT)、凝血酶原时间(PT)、活化部分凝血活酶时间(APTT)水平均高于术前,研究组高于对照组(P<0.05),两组纤维蛋白原(FIB)水平低于术前,研究组低于对照组(P<0.05)。两组术后不良反应差异无统计学意义(P>0.05)。研究组术后苏醒时间、拔管时间、下肢运动恢复时间及排尿恢复时间均低于对照组(P<0.05)。结论老年TLEF患者内固定术中接受小剂量轻比重腰-硬联合麻醉和股神经及坐骨神经阻滞麻醉均有较好麻醉效果,但股神经及坐骨神经阻滞麻醉可明显减轻血液高凝状态,减少麻醉不良反应,有效促进患者术后恢复。

超声引导下双侧腹横肌平面阻滞复合静脉自控镇痛泵在腰-硬联合麻醉剖宫产术后产妇中的应用

目的探讨超声引导下双侧腹横肌平面阻滞复合静脉自控镇痛泵在腰-硬联合麻醉剖宫产术后产妇中的应用效果。方法选取2022年5月至2023年6月在我院接受腰-硬联合麻醉剖宫产手术的104例产妇,根据术后镇痛方式不同分为参照组(51例)和研究组(53例)。参照组术后予以常规腹横肌平面阻滞复合静脉自控镇痛泵进行镇痛,研究组术后予以超声引导下双侧腹横肌平面阻滞复合静脉自控镇痛泵进行镇痛,均持续干预至出院。比较两组产妇术后疼痛程度、镇痛泵按压次数、首次下地活动时间、术后住院时间及不良反应。结果研究组术后6 h、12 h的VAS评分低于参照组(P<0.05)。研究组镇痛泵按压次数少于参照组,首次下地活动时间、住院时间短于参照组(P<0.05)。研究组不良反应发生率为5.66%,低于参照组的19.61%(P<0.05)。结论腰-硬联合麻醉剖宫产术后产妇应用超声引导下双侧腹横肌平面阻滞复合静脉自控镇痛泵的镇痛效果较好,能明显促进产妇术后尽快恢复,减少不良反应的发生。

大东沟泥石流勘查与治理应用

查明泥石流的地质环境条件、分布范围、规模、危害、影响因素和诱发因素等,评价与预测其稳定性,查明拟建防治工程部位工程地质条件,为下一步地质灾害治理提供依据并减小泥石流发生频率。运用地质测量地质测绘和山地工程在拟建工程部位钻孔开挖浅井和探槽综合有效的勘查方法确定地质参数。结果表明,泥石流的物源成分为安山岩,分布在形成区的主沟内和四道沟部分支沟内,危害对象为当地1100人,潜在财产损失高达9480.25万元。此外,泥石流为暴雨诱发大型低频稀性水石型沟谷泥石流,其危害性等级为中型,潜在危险性是特大型。通过对泥石流的治理,可成功保护环境,减少财产损失,促进地方的社会稳定,促进当地经济的快速发展。

规范化硬膜外阻滞复合全麻对老年卵巢癌细胞减灭术患者的影响

目的:探讨规范化硬膜外阻滞复合全麻对老年卵巢癌细胞减灭术应激、免疫指标的影响。方法:选取2022年6月至2023年9月兰州市第一人民医院收治的80例老年卵巢癌患者,分为对照组和观察组,各40例,对照组在手术时实施全麻,观察组进行规范化硬膜外阻滞复合全麻,比较两组麻醉后患者的应激、免疫指标变化情况。结果:观察组术后并发症明显低于对照组(P<0.05);两组诱导前、术毕时HR、MAP水平差异无统计学意义(P>0.05),气管插管、切皮后、手术探查时,观察组明显低于对照组(P<0.05);术后当天、第5天两组炎症因子水平无明显差异(P>0.05),术后1天、术后3天观察组炎症因子水平明显高于对照组(P<0.05)。结论:对于进行细胞减灭术的老年卵巢癌患者实施规范化硬膜外阻滞复合全麻的麻醉方式,患者术后并发症发生率相对较低,围手术期间血流动力学保持平稳,并且能减轻患者术后免疫功能的抑制。

超声引导神经阻滞复合全身麻醉对创伤性胫腓骨骨折患者的应用研究

目的:分析超声引导下腘窝处坐骨神经-股神经阻滞复合全身麻醉对创伤性胫腓骨骨折患者血流动力学及术后谵妄的影响,以探讨其应用效果。方法:回顾性纳入2022年1月—2023年11月乐平市中医医院收治的110例创伤性胫腓骨骨折患者的临床资料,根据术中采用的麻醉方法分为对照组(45例)和观察组(65例)。对照组采取全身麻醉诱导手术,观察组采用超声引导的神经阻滞复合全身麻醉。观察患者血流动力学及术后谵妄情况。结果:观察组气管拔管和苏醒时间均早于对照组,丙泊酚用量明显少于对照组(P<0.05)。麻醉前,两组收缩压及心率比较,差异均无统计学意义(P>0.05);麻醉结束时,观察组收缩压及心率均明显高于对照组(P<0.05)。术后1、2、3 d,观察组术后谵妄[简易智能精神状态检查量表(MMSE)]评分高于对照组,静息状态下疼痛视觉模拟评分法(VAS)评分明显低于对照组(P<0.05)。结论:超声引导神经阻滞复合全身麻醉治疗创伤性胫腓骨骨折患者,有利于手术中血流动力学管理,减少阿片类镇痛药物的使用,减少患者术后谵妄发生率,安全性良好。