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排序方式: 共有504条查询结果,搜索用时 31 毫秒
1.
肺癌脑转移的CT研究 总被引:1,自引:0,他引:1
目的:研究分析肺癌脑转移瘤的CT特征和规律。材料与方法:回顾总结并分析经病理证实的74例肺癌脑转移病例,就其转移灶的CT特征和规律做出评价。结果:肺癌脑转移以顶、额叶为好发部位,转移灶主要表现为结节状均一强化和环状强化中心低密度,可单发或多发。瘤周水肿以腺癌和低分化癌较明显。环状强化中心低密度灶周水肿较结节均一强化灶周水肿明显。结论:CT增强扫描能清楚地显示转移灶的大小、部位、形态、边缘状况和密度变化,是肺癌脑转移的首选检查方法。 相似文献
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对11个人心标本沿右心室流入道和流出道各壁长轴纵行切开,再将各壁横切为上、中、下3份,各份按1mm厚度逐层切开,观察其各层肌纤维方向的角度并绘成坐标图。结果表明,右心室流入、流出道游离壁的肌纤维方向由浅入深基本上是渐变的。流入道游离壁的下1/3和流出道的上1/3,浅中层与内层之间可有纤维方向的突变。流入道隔壁的纤维方向从右向左逐渐移行,偶在左、右室内膜面有方向的改变。流出道右室面的中上部有一纤维方向变动较大的层次。对右心室各壁肌纤维方向的排列特或、分层、功能及其临床意义进行了探讨。 相似文献
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Palmer SL Gajjar A Reddick WE Glass JO Kun LE Wu S Xiong X Mulhern RK 《Neuropsychology》2003,17(4):548-555
Fifty children diagnosed with medulloblastoma completed 188 psychological evaluations using the Wechsler Intelligence Scales for Children (D. Wechsler, 1974, 1991) over a 7-year study period following 35-40 Gy postoperative craniospinal irradiation. Random coefficient models were used to predict the trend in the children's intellectual performance as a function of time since diagnosis, with both patient and treatment variables as parameters of this function. A quadratic model demonstrated a delay prior to decline in performance for older patients, whereas the younger patients showed an immediate loss of performance with a plateau at approximately 6 years postdiagnosis. A steeper decline was found for those with higher baseline performance. Clinicians may use the proposed predictive model to identify those patients who are at risk of significant intellectual decline. 相似文献
4.
Zhiling Zhang Longbin Xiong Zeshen Wu Huiming Liu Kang Ning Yulu Peng Chunping Yu Ya Ding Desheng Weng Jianchuan Xia Lijuan Jiang Shengjie Guo Hui Han Fangjian Zhou Pei Dong 《Translational andrology and urology》2021,10(5):2091
BackgroundRadical/cytoreductive nephrectomy or nephron-sparing surgery may be thought to be not safe or unfeasible in some renal cell carcinoma (RCC) patients in which tumor is locally advanced or highly complicated. Neoadjuvant therapy may reduce the volume of the tumor, thus facilitates surgery. The aim the study is to evaluate the efficacy and safety of neoadjuvant combination of pazopanib or axitinib and PD-1-activated dendritic cell-cytokine-induced killer (PD-1/DC-CIK) cell immunotherapy in those patients.MethodsData from 16 RCC patients who received neoadjuvant pazopanib (Group P, n=9) or axitinib (Group A, n=7) plus PD-1/DC-CIK cells immunotherapy were reviewed retrospectively. A total of 9 participants that were potential candidates for radical/cytoreductive nephrectomy (RN/CN) had locally advanced tumor and 5 participants with partial nephrectomy (PN) absolute indications had highly complicated tumors. The efficacy outcomes were based on volume changes of the primary tumor, lymph nodes, and tumor thrombus in 13 participants with complete computed tomography (CT) imaging. The treatment-related toxicities and surgical complications were also reported.ResultsWith a median of 2.1 months treatment, the overall volume of the tumors decreased by a median of 42.30% [interquartile range (IQR): 19.37–66.78%]. Specifically, the median reduction of tumor volume was 88.77 and 15.50 cm3 in group P and group A, respectively (P=0.014). However, participants in Group P were more likely to experience grade 3 or 4 treatment-related adverse events (AEs) than those in Group A (44.4% vs. 0). Finally, all participants were candidates for appropriate surgery after neoadjuvant therapy (as assessed by the surgeon), and 10 participants accepted surgery, including 5 PN, 4 RN/CN, and 1 lymph node dissection. A solitary participant had Clavien grade IV acute renal failure required dialysis and another had grade II lymphatic leakage.ConclusionsNeoadjuvant combination of pazopanib or axitinib and PD-1/DC-CIK cells immunotherapy was well-tolerated and could effectively reduce the volume of tumors in locally advanced or highly complicated RCC patients. 相似文献
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Desmond R. H. Mao Marcus E. H. Ong Chungli Bang Mohamed D. T. Salim Yih Yng Ng Desiree A. Lie 《Prehospital emergency care》2018,22(2):260-265
Objectives: Paramedics' decision to terminate field resuscitation without a physician present may depend on personal and external factors. This study investigates factors associated with paramedic psychological comfort with termination of resuscitation (TOR) to inform future training. Methods: We administered an anonymous survey to all practicing paramedics in a large urban Asian Emergency Medical Services system where formal TOR training had not yet been conducted and field TOR was not routinely applied. The survey assessed psychological comfort using the validated Psychological Comfort Total (PCT) scale (summed score of 28 items, with higher scores representing greater comfort). We examined scores associated with four personal (prior resolution of personal loss, knowledge of survival probability, religious affiliation and experience with death pronouncements) and two external (location of patient and perceived trust of family) factors. Data were entered into Excel and analyzed by t-tests and ANOVA. Results: Response rate was 73.6% (254/345). Respondents were 30.3 years (mean, SD 7.1) with 7.2 years (mean, SD 5.54) of practice experience. Over 60% had been involved in 6 or more field death pronouncements in the prior 12 months. Higher PCT scores were associated with prior resolution of personal loss and knowledge of survival probability. Lower PCT scores were associated with patient location in a public place and perceived family lack of trust. PCT scores were not associated with paramedic religious affiliation or number of prior death pronouncements. Conclusions: Paramedic psychological comfort with field death pronouncement is associated with personal and external factors. Since paramedic comfort is important for protocol adoption, TOR education should target not only knowledge, but also public arena management, communication skills for engaging with families, and help paramedics resolve prior personal loss. 相似文献
7.
Shengjie Wu Lan Su Pugazhendhi Vijayaraman Rujie Zheng Mengxing Cai Lei Xu Ruiyu Shi Zhouqing Huang Zachary I. Whinnett Weijian Huang 《The Canadian journal of cardiology》2021,37(2):319-328
BackgroundLeft bundle branch pacing (LBBP) is a novel method for delivering cardiac resynchronization therapy (CRT). We compared on-treatment outcomes with His bundle pacing (HBP) and biventricular pacing (BVP) in this nonrandomized observational study.MethodsConsecutive patients with left-ventricular ejection fraction (LVEF) ≤ 40% and typical left bundle branch block (LBBB) referred for CRT received BVP, HBP, or LBBP. QRS duration, pacing threshold, LVEF, and New York Heart Association (NYHA) class were assessed.ResultsOne hundred thirty-seven patients were recruited: 49 HBP, 32 LBBP, and 54 BVP; 2 did not receive CRT. The majority of patients had nonischemic cardiomyopathy. Mean paced QRS duration was 100.7 ± 15.3 ms, 110.8 ± 11.1 ms, and 135.4 ± 20.2 ms during HBP, LBBP, and BVP, respectively. HBP and LBBP demonstrated a similar absolute increase (Δ) in LVEF (+23.9% vs +24%, P = 0.977) and rate of normalized final LVEF (74.4% vs 70.0%, P = 0.881) at 1-year follow-up. This was significantly higher than in the BVP group (Δ LVEF +16.7% and 44.9% rate of normalized final LVEF, P < 0.005). HBP and LBBP also demonstrated greater improvements in NYHA class compared with BVP. LBBP was associated with higher R-wave amplitude (11.2 ± 5.1 mV vs 3.8 ± 1.9 mV, P < 0.001) and lower pacing threshold (0.49 ± 0.13 V/0.5 ms vs 1.35 ± 0.73 V/0.5 ms, P < 0.001) compared with HBP.ConclusionLBBP appears to be a promising method for delivering CRT. We observed similar improvements in symptoms and LV function with LBBP and HBP. These improvements were significantly greater than those seen in patients treated with BVP in this nonrandomized study. These promising findings justify further investigation with randomized trials. 相似文献
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目的 评价高分辨力CT(HRCT)对肺间质性疾病诊断的作用,并探讨MSCT肺容积指标与肺功能(PFT)指标之间的相关性.方法 选择50例临床诊断为间质性肺疾病的患者为病例组,对照组为22例CT胸部体检且肺功能正常者,对比两者间各种指标的差异.同时观察所有对象肺HRCT的细微结构的改变.结果 HRCT易于发现肺部间质性病变的网状阴影、小结节阴影、磨玻璃样阴影、肺气肿和细支气管病变.CT肺容积指标中,最大呼气末容积(Vex)与残气量(RV),最大吸气末容积(Vin)与肺总量(TLC),容积差(Vin-Vex)与用力肺活量(FVC),容积比(Vin/Vex)与残气量及肺总量比(RV/TLC),存在着较好的相关性,r值分别为0.91、0.87、0.65、0.65,P<0.01.结论 HRCT对诊断ILD有很高的价值,MSCT肺容积与PFT容积指标有显著相关性,MSCT肺容积指标能用于临床评价肺功能. 相似文献