H

Richter综合征
  • 文章类型: Journal Article
    目的:本研究比较了准备时间,错误,满意,在一项随机研究中,与两种需要重建的RSV疫苗(VRR1和VRR2)相比,单盲时间和运动研究。方法:药剂师,护士,和药学技术人员被随机分配到三种疫苗的制备顺序。参与者阅读说明,然后连续制备三种疫苗,其间有3至5分钟的洗脱期。由训练有素的药剂师对准备时间和错误进行视频记录和审查,使用预定义,疫苗特异性检查表。参与者的人口统计,对疫苗制备的满意度,并记录疫苗偏好。受试者内方差分析用于比较准备时间。混合效应泊松和有序逻辑回归模型用于比较准备错误的数量和满意度得分,分别。结果:63名药师(60%),护士(35%)和药学技术人员(5%)参加了美国四个地点的活动。PFS的每个剂量的最小二乘平均准备时间比VRR1快141.8秒(95%CI:156.8,126.7;p<0.0001),比VRR2快103.6秒(118.7,88.5;p<0.0001),比合并的VRR快122.7秒(95%CI:134.2,111.2;p<0.0001)。PFS的总体满意度(“非常”和“非常”)为87.3%,VRR1为28.6%,VRR2为47.6%。大多数参与者(81.0%)更喜欢PFS疫苗。局限性:这项研究由于无法完全失明的观察者而受到限制。为了尽量减少秩序的影响,我们使用了3序列块设计,然而,疫苗的制备顺序可能影响结局.参与者被评估一次,而如果进行重复制备,则每种疫苗的训练效率可能会提高。结论:PFS疫苗可以大大简化疫苗制备过程,允许管理员每小时准备的剂量几乎是小瓶和注射器系统的四倍。
    UNASSIGNED: The current study compared preparation time, errors, satisfaction, and preference for a prefilled syringe (PFS) versus two RSV vaccines requiring reconstitution (VRR1 and VRR2) in a randomized, single-blinded time and motion study.
    UNASSIGNED: Pharmacists, nurses, and pharmacy technicians were randomized to a preparation sequence of the three vaccines. Participants read instructions, then consecutively prepared the three vaccines with a 3-5-min washout period in between. Preparations were video recorded and reviewed by a trained pharmacist for preparation time and errors using predefined, vaccine-specific checklists. Participant demographics, satisfaction with vaccine preparation, and vaccine preference were recorded. Within-subjects analysis of variance was used to compare preparation time. Mixed-effects Poisson and ordered logistic regression models were used to compare the number of preparation errors and satisfaction scores, respectively.
    UNASSIGNED: Sixty-three pharmacists (60%), nurses (35%), and pharmacy technicians (5%) participated at four sites in the United States. The least squares mean preparation time per dose for PFS was 141.8 s (95% CI = 156.8-126.7; p <.0001) faster than for VRR1, 103.6 s (95% CI = 118.7-88.5; p <.0001) faster than for VRR2, and 122.7 s (95% CI = 134.2-111.2; p <.0001) faster than the pooled VRRs. Overall satisfaction (combined \"Very\" and \"Extremely\") was 87.3% for PFS, 28.6% for VRR1, and 47.6% for VRR2. Most participants (81.0%) preferred the PFS vaccine.
    UNASSIGNED: The study is limited by the inability to completely blind observers. To minimize the effects of order, we utilized a 3-sequence block design; however, the order in which the vaccines were prepared may have affected outcomes. Participants were assessed once, whereas if repeated preparations were performed there may have been trained efficiencies gained for each vaccine.
    UNASSIGNED: PFS vaccines can greatly simplify the vaccine preparation process, allowing administrators to prepare almost four times more doses per hour than with vial and syringe systems.
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  • 文章类型: Journal Article
    用于心脏骤停(SCA)一级预防(PP)的植入式心律转复除颤器(ICD)在发展中国家未得到充分利用。改善SCA研究已经确定了1.5个一级预防(1.5PP)患者的子集,这些患者具有较高的SCA风险和ICD治疗的显着死亡率益处。从中国医疗体系的角度来看,我们评估了ICD治疗的成本效益与不对1.5PP患者进行ICD治疗,以告知临床和政策决定.
    对已发布的马尔可夫模型进行了调整和验证,以模拟疾病的病程并描述1.5PP患者的不同健康状况。病人的特点,死亡率,效用和并发症的估计来自改善SCA研究和其他文献.成本投入来自政府投标价格,中国9家公立医院的医疗服务价格和临床专家调查。对于ICD和无ICD治疗,对整个生命周期内的总医疗费用和质量调整生命年(QALYs)进行建模,并计算增量成本-效果比(ICER).进行了确定性和概率敏感性分析以评估模型参数的不确定性。我们使用中国药物经济学评价指南推荐的支付意愿(WTP)阈值,2022年是中国人均GDP的一到三倍(85,698-257,094元人民币)。
    与没有ICD治疗相比,ICD治疗的增量成本效益比(ICER)为139,652CNY/QALY,这大约是中国人均GDP的1-2倍。ICD治疗具有成本效益的概率为92.1%。敏感性分析的结果支持基本案例的发现。
    ICD治疗与没有ICD治疗相比,对于中国的1.5PP患者来说是具有成本效益的。
    UNASSIGNED: Implantable cardioverter defibrillator (ICDs) for primary prevention (PP) of sudden cardiac arrest (SCA) is underutilized in developing countries. The Improve SCA study has identified a subset of 1.5 primary prevention (1.5PP) patients with a higher risk of SCA and a significant mortality benefit from ICD therapy. From the perspective of China\'s healthcare system, we evaluated the cost-effectiveness of ICD therapy vs. no ICD therapy among 1.5PP patients with a view to informing clinical and policy decisions.
    UNASSIGNED: A published Markov model was adjusted and verified to simulate the course of the disease and describe different health states of 1.5PP patients. The patient characteristics, mortality, utility and complication estimates were obtained from the Improve SCA study and other literature. Cost inputs were sourced from government tender prices, medical service prices and clinical experts\' surveys in 9 Chinese public hospitals. For both ICD and no ICD therapy, the total medical costs and quality-adjusted life-years (QALYs) were modelled over a lifetime horizon and the incremental cost-effectiveness ratio (ICER) was calculated. Deterministic and probabilistic sensitivity analyses were performed to assess the uncertainty of the model parameters. We used the willingness-to-pay (WTP) threshold recommended by China Guidelines for Pharmacoeconomic Evaluations, one to three times China\'s GDP per capita (CNY85,698-CNY257,094) in 2022 Chinese Yuan.
    UNASSIGNED: The incremental cost effectiveness ratio (ICER) of ICD therapy compared to no ICD therapy is 139,652 CNY/QALY, which is about 1-2 times China\'s GDP per capita. The probability that ICD therapy is cost effective was 92.1%. Results from sensitivity analysis supported the findings of the base case.
    UNASSIGNED: ICD therapy compared to no ICD therapy is cost-effective for the 1.5PP patients in China.
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  • 文章类型: Journal Article
    UNASSIGNED:这项真实世界的回顾性数据库研究量化了美国肺癌或甲状腺癌患者中生物标志物检测的成本。
    UNASSIGNED:商业声称IBMMarketscan数据库,一个去识别的现实世界数据集,用于识别2015年1月至2019年12月之间诊断为肺癌或甲状腺癌的患者。符合条件的患者为18岁或以上,具有两个或更多个肺或甲状腺诊断代码。排除具有先前癌症诊断证据的患者。亚组分析评估了合格的转移性疾病患者。描述性统计数据用于评估商业保险计划付款人和患者自付费用,以进行总体诊断测试以及测试程序代码和付款人类型。成本调整为2020美元。
    UNASSIGNED:共有23,633名肺癌患者符合条件,其中13,320人患有转移性疾病。有36,867名甲状腺癌患者,其中2,241人患有转移性疾病。在68.4%/75.8%(肺/转移性肺)和18.2%/42.3%(甲状腺/转移性甲状腺)中观察到生物标志物代码。很少有患者具有综合生物标志物测试的代码(5.2%/6.7%肺/转移性肺,0.3%/2.2%甲状腺/转移性甲状腺)在进行生物标志物检测的人群中,所有生物标志物检测的每位患者的总费用中位数分别为$394/$462(肺/转移性肺)和$148/$232(甲状腺/转移性甲状腺).付款人的终生生物标志物总费用从128美元(消费者驱动的健康计划)到477美元(首选提供者组织)不等。除消费者驱动的健康计划外,肿瘤类型和所有付款人类型的患者终生自付费用中位数为0.00美元(甲状腺12美元,转移性肺10美元)。
    未经评估:虽然全面测试增加了生物标志物测试的成本,这些数据表明,对于支付者和患者而言,生物标志物检测的终生成本相对较低.在美国,生物标志物测试的成本不应限制这些人群获得商业保险计划。
    UNASSIGNED: This real-world retrospective database study quantified the costs of biomarker testing in a US population of patients with lung or thyroid cancers.
    UNASSIGNED: The commercial claims IBM Marketscan database, a de-identified real-world dataset, was used to identify patients diagnosed with lung or thyroid cancer between 1/2015 and 12/2019. Eligible patients were 18 years or older with two or more lung or thyroid diagnosis codes. Patients were excluded who had evidence of prior cancer diagnoses. Subgroup analyses evaluated eligible patients with metastatic disease. Descriptive statistics were used to evaluate commercial insurance plan payer and patient out-of-pocket costs for diagnostic testing overall as well as by test procedure code and payer type. Costs were adjusted to 2020 US dollars.
    UNASSIGNED: A total of 23,633 patients with lung cancer were eligible, 13,320 of whom had metastatic disease. There were 36,867 patients with thyroid cancer, 2,241 of whom had metastatic disease. Biomarker codes were observed among 68.4/75.8% (lung/metastatic lung) and 18.2/42.3% (thyroid/metastatic thyroid). Few patients had codes for comprehensive biomarker tests (5.2/6.7% lung/metastatic lung, 0.3/2.2% thyroid/metastatic thyroid) Among those with biomarker tests, the median per-patient total payer lifetime costs of all biomarker testing were $394/$462 (lung/metastatic lung) and $148/$232 (thyroid/metastatic thyroid). Total lifetime biomarker costs for payers ranged from a median of $128 (consumer-driven health plans) to $477 (preferred provider organizations). Median lifetime patient out-of-pocket costs were $0.00 for both tumor types and all payer types except for consumer-driven health plans ($12 for thyroid and $10 for metastatic lung).
    UNASSIGNED: While comprehensive testing adds to the cost of biomarker testing, these data suggest the relatively low lifetime cost of biomarker testing for both payers and patients. Costs for biomarker testing should not be a limitation to access among these populations with commercial insurance plans in the US.
    This real-world retrospective database study found that there is a relatively low lifetime total cost of biomarker testing for the care of patients with lung or thyroid cancers. While comprehensive testing adds to the cost of biomarker testing, these data suggest the relatively low lifetime cost of biomarker testing for both payers and patients. Payer costs for biomarker testing do not appear to be limitation to access among populations with commercial insurance plans in this study.
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  • 文章类型: Journal Article
    PULsE-AI试验旨在确定筛查策略的有效性,该策略包括机器学习风险预测算法与诊断测试相结合,以识别初级保健中未诊断的房颤(AF)。本研究旨在评估在现实世界中实施筛查策略的成本效益。
    来自PULsE-AI试验的数据-前瞻性,随机化,2019年6月至2021年2月在英格兰6项一般实践中进行的对照试验用于成本效益分析,包括混合筛查决策树和MarkovAF疾病进展模型.模型结果在个人和人群水平(估计英国人口≥30岁,未诊断的房颤高危人群)报告,并包括筛查的患者人数。确定的房颤病例数,平均总成本和增量成本(筛查,事件,治疗),质量调整寿命年(QALYs),和增量成本效益比(ICER)。
    据估计,在英国高危人群(330万)中,筛查策略可导致45,493例新的房颤诊断。与仅常规护理相比,估计增加了14,004次终生诊断。接受筛查策略的高风险个体的每位患者费用估计为1,985英镑(而仅接受常规护理的个体为1,888英镑)。在人口层面,筛查策略的费用增加约3.22亿英镑,QALY增加81,000例.与常规护理相比,筛查策略仅在公认的ICER门槛为每QALY获得20,000英镑时显示出成本效益,ICER为3994英镑/QALY。
    与仅常规护理相比,它是成本效益的目标个人在高风险的未诊断的房颤,通过AF风险预测算法,然后谁应该接受诊断测试。这种房颤风险预测算法可以减少需要筛选以识别未确诊房颤的患者数量。从而减轻初级保健负担。
    UNASSIGNED: The PULsE-AI trial sought to determine the effectiveness of a screening strategy that included a machine learning risk prediction algorithm in conjunction with diagnostic testing for identification of undiagnosed atrial fibrillation (AF) in primary care. This study aimed to evaluate the cost-effectiveness of implementing the screening strategy in a real-world setting.
    UNASSIGNED: Data from the PULsE-AI trial - a prospective, randomized, controlled trial conducted across six general practices in England from June 2019 to February 2021 - were used to inform a cost-effectiveness analysis that included a hybrid screening decision tree and Markov AF disease progression model. Model outcomes were reported at both individual- and population-level (estimated UK population ≥30 years of age at high-risk of undiagnosed AF) and included number of patients screened, number of AF cases identified, mean total and incremental costs (screening, events, treatment), quality-adjusted-life-years (QALYs), and incremental cost-effectiveness ratio (ICER).
    UNASSIGNED: The screening strategy was estimated to result in 45,493 new diagnoses of AF across the high-risk population in the UK (3.3 million), and an estimated additional 14,004 lifetime diagnoses compared with routine care only. Per-patient costs for high-risk individuals who underwent the screening strategy were estimated at £1,985 (vs £1,888 for individuals receiving routine care only). At a population-level, the screening strategy was associated with a cost increase of approximately £322 million and an increase of 81,000 QALYs. The screening strategy demonstrated cost-effectiveness versus routine care only at an accepted ICER threshold of £20,000 per QALY-gained, with an ICER of £3,994/QALY.
    UNASSIGNED: Compared with routine care only, it is cost-effective to target individuals at high risk of undiagnosed AF, through an AF risk prediction algorithm, who should then undergo diagnostic testing. This AF risk prediction algorithm can reduce the number of patients needed to be screened to identify undiagnosed AF, thus alleviating primary care burden.
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  • 文章类型: Journal Article
    OBJECTIVE: The aim of this study was to capture and measure the impact of caregiving for an adult with uncontrolled drug-resistant focal-onset seizures (FOS) on the caregivers\' quality of life (QoL), and to quantify the costs of productivity losses associated with providing informal care in this patient population.
    METHODS: An online survey, which included the EQ-5D-5L, CarerQol-7D and the Work Productivity and Activity Impairment: Specific-Health Problem (WPAI:SHP) questionnaires, was administered to caregivers of individuals with uncontrolled drug-resistant FOS in the United Kingdom (UK), France, Spain, Germany, Italy, and Sweden.
    RESULTS: The study included 345 caregivers. Most were males, aged between 25 and 34 years old whose caring responsibilities took between 15 and 24 h per week. The caregivers\' mean EQ-5D-5L score was 0.6, with 95% confidence intervals (CI) of [0.58, 0.63], whilst the mean CarerQol-7D score was 72.61 [70.46, 74.76]. Caregivers\' mental health was the most substantially affected aspect of their QoL. In addition, most caregivers reported deriving some or a lot of fulfilment out of their caregiving tasks. The WPAI:SHP showed that the mean percentage of work impairment due to caregiving responsibilities was 63%, [59.75, 66.26]. The mean annualised costs of productivity losses per caregiver were estimated at €14,872 [€11,908; €17,888].
    CONCLUSIONS: One limitation consisted in the use of an online survey instead of a face-to-face interview. However, the medical terms were clearly explained, and examples were provided to help participants to give accurate responses. Another limitation was that the respondents self-reported as caregivers. Efforts were made to mitigate this weakness by using screener questions.
    CONCLUSIONS: This study found that providing informal care for people with uncontrolled drug-resistant FOS had a negative impact on caregivers\' QoL, with mental health being affected the most. However, caregivers found their role fulfilling and had support with their caring tasks.
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  • 文章类型: Journal Article
    本研究旨在评估patiromer暴露与在一组MedicareAdvantage高钾血症(HK)患者中,没有钾(K)结合剂(NoKb)暴露与医疗保健利用和支出。
    使用Optum的诊所形式学数据集市(研究期间2016-2019),作者根据基线特征评估了血清K+浓度≥5.0mmol/L且诊断为HK的倾向评分匹配的患者(1∶1).以下结果进行了比较:(1)住院/急诊科(ED)遭遇,(2)住院费用大于或等于平均MedicareAdvantage住院费用(即$14,900),(3)相对医疗支出率。使用Logistic回归和零膨胀负二项回归分析结果。
    研究队列包括1,539个patilomer和NoKb匹配对。基线特征为(patiromer/NoKb):年龄74/75岁;女性42/40%;血清钾5.6/5.6mmol/L;eGFR率36/36mL/min/1.73m2;低收入补贴42/41%,慢性肾病96/96%;终末期肾病12/12%;充血性心力衰竭37/36%。共有253对匹配的患者(506名患者)未检查,并在6个月时进行了分析。观察到住院/ED遭遇的25%(patiromer)和37%(NoKb)(比值比[OR]0.58,95%置信区间[CI]:0.38-0.89)。暴露于患者的住院费用≥$14,900的相对几率要低50%NoKb(OR[95%CI]:0.47[0.25-0.89])。相对医疗总支出率(包括住院,门诊病人,ED,和药房费用)对于暴露于patiromer的患者比NoKb(支出率[95%CI]:0.81[0.67-0.98])。
    在香港的MedicareAdvantage患者中,patiromer暴露(vs.NoKb)与住院/急诊就诊比例的统计学显着降低相关,住院费用≥14,900美元,医疗总支出较低。进一步研究,样本量较大,有必要充分验证这些发现。
    UNASSIGNED: This study aimed to estimate the association of patiromer exposure vs. no potassium (K+) binder (NoKb) exposure with healthcare utilization and expenditures among a cohort of Medicare Advantage patients with hyperkalemia (HK).
    UNASSIGNED: Using Optum\'s Clinformatics Data Mart (study period 2016-2019), the authors assessed propensity score-matched patients (1:1) with a serum K+ concentration ≥5.0 mmol/L and an HK diagnosis that were exposed to patiromer or NoKb on baseline characteristics. The following outcomes were compared: (1) inpatient/emergency department (ED) encounters, (2) inpatient costs greater than or equal to mean Medicare Advantage inpatient cost (i.e. $14,900), and (3) the relative healthcare spending rate. Logistic regression and zero-inflated negative binomial regression were used to analyze the outcomes.
    UNASSIGNED: The study cohort included 1,539 patiromer and NoKb matched pairs. Baseline characteristics were (patiromer/NoKb): age 74/75 years; female 42/40%; serum K+ 5.6/5.6 mmol/L; eGFR rate 36/36 mL/min/1.73 m2; low-income subsidy 42/41%, chronic kidney disease 96/96%; end-stage renal disease 12/12%; and congestive heart failure 37/36%. A total of 253 matched pairs (506 patients) remained uncensored and were analyzed at 6 months. Inpatient/ED encounters were observed for 25% (patiromer) and 37% (NoKb) (odds ratio [OR] 0.58, 95% confidence interval [CI]: 0.38-0.89). The relative odds of having inpatient costs ≥$14,900 were ∼50% less for patients exposed to patiromer vs. NoKb (OR [95% CI]: 0.47 [0.25-0.89]). The relative total healthcare spending rate (including inpatient, outpatient, ED, and pharmacy costs) was 19% less for patients exposed to patiromer vs. NoKb (spending rate ratio [95% CI]: 0.81 [0.67-0.98]).
    UNASSIGNED: Among Medicare Advantage patients with HK, patiromer exposure (vs. NoKb) was associated with statistically significant reductions in the proportion with inpatient/ED encounters, inpatient costs ≥$14,900, and lower total healthcare spending. Further research, with larger sample size, is warranted to fully validate these findings.
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  • 文章类型: Journal Article
    BACKGROUND: Helicobacter pylori are gram-negative spiral shaped bacteria, with sheathed flagella. H. pylori infection is one of the most common chronic infections in humans. Infection is usually acquired during childhood, and becomes a lifelong infection in most people unless treated. The aim of this study was to evaluate serum levels of oxidative stress indices in children with H. pylori infection.
    METHODS: The present study was carried out on 60 children infected with H. pylori including 28 males, 32 females with their age ranging from 7-10 years and mean age value of 8.5 ± 1.65 ( Group I). This study included also 60 children as a control group including 26 males, 34 females with their age ranging from 7-11 and mean age value of 8.99 ± 1.63 (Group II). For all children in groups I the following were done: Diagnosis of H. pylori infection through H. pylori stool antigen testing using enzyme immunoassay kit and gastric antrum mucosal biopsies which were tested for urease activity using Campylobacter like organism test (CLO test). Measurements of serum oxidative stress markers including Superoxide dismutase (SOD), Malondialdhyde, Glutathione, Catalase and Nitric oxide were done in patients and controls.
    RESULTS: Serum nitric oxide and reduced glutathione were significantly lower in patients compared to controls while serum MDA, Serum catalase and Serum SOD were significantly higher in patients compared to controls (nitric oxide was 91.111 ±6.366 in patients versus 107.211±2.121 in controls with p value of 0.001, reduced glutathione in patients was 2.457± 0.081 versus 2.889±0.491 in controls with p value of 0.001, serum MDA in patients was 140.22±5.18 versus 116.22±2.98 in controls with p value of 0.001, catalase was 401.645± 4.344 versus 278.221±71.712 in controls with p value of 0.001 and SOD in patients was 16.936±9.145 versus 5.578±0.231 in controls with p value of 0.001).
    CONCLUSIONS: H. pylori infection is associated with oxidative stress with significantly lower serum nitric oxide and reduced glutathione and significantly higher serum MDA, catalase and SOD in patients compared to controls.
    CONCLUSIONS: Antioxidants may be beneficial adjuvant treatment in H. pylori infection as H. pylori infection is associated with oxidative stress.
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  • 文章类型: Comparative Study
    BACKGROUND: MBT carry poor prognosis and more than 80% of MBT recur locally within 2 cm of the resection margin because of inadequate surgical removal. A number of techniques have been implemented in recent years to improve surgical removal of MBT with variable success. We examined two methods commonly used to resect MBT to establish which one offered the best chances of gross total removal; MRI guided technology and ALA-induced fluorescence.
    METHODS: Twenty consecutive patients diagnosed with MBT were included in this study. They were given 20mg ALA per kg body weight 3h before anaesthesia orally mixed in water. Surgery was planned using preoperative enhanced MPR age images. Surgery was executed using the Stealth Station image guidance system and ALA-induced fluorescence microsurgical techniques. During surgery the intensity of fluorescence was graded into red, pink or blue. The intensity of fluorescence was also measured using pulsed 405 nm laser and a compact spectrometer using a touch probe directly placed on the tissue. The extent of tumour invasion was assessed intraoperatively using standard white light, blue light and spectroscopic measurements. Postoperative enhanced MRI was used to assess the extent of resection and the volume of residual tumour was measured.
    RESULTS: There were six newly diagnosed GBM, eight recurrent GBM, one oligodendroglioma (ODG) and five metastases (MET). On enhanced MRI, the mean diameter of new GBM, recurrent GBM, ODG and MET was 2.3 cm, 2.3 cm, 1.5 cm, and 2.3 cm respectively. Under the blue light, the mean diameter of new GBM, recurrent GBM, ODG and MET was 2.9 cm, 3 cm, 1.5 cm and 2.3 cm respectively. The results of quantitative measurements of fluorescence ratios revealed that red fluorescence corresponded to 5.9-11.6 (solid tumour on histology), and pink fluorescence measured 0.8-1.9 (infiltrating edge of tumour on histology). When we compared the maximum tumour diameter of GBM we found on average it was 10mm wider on spectroscopy compared to standard white light microscopy and 6mm wider than what the enhanced MRI demonstrated.
    CONCLUSIONS: Fluorescence technology revealed that GBMs are wider than the enhanced MRI had demonstrated, while MET enhanced MRI was similar in size to fluorescence. Furthermore, solid tumour can be identified intraoperatively and can be measured using fluorescence and spectroscopy techniques and it can be removed safely. Infiltrating tumour can also be identified intraoperatively using this technology and can be removed in non-eloquent areas to maximise surgical resection.
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  • 文章类型: Journal Article
    淋巴组织对于研究人类免疫缺陷病毒(HIV)和猕猴中猿猴免疫缺陷病毒(SIV)的发病机理非常感兴趣,但相对难以非侵入性采样。细针穿刺(FNA)细胞学,通常是淋巴结病的诊断程序,可用于HIV/SIV感染过程中组织细胞亚群的纵向研究。在这项研究中,我们从猪尾猕猴连续采样淋巴结(LN)FNA,并在绝对计数方面研究细胞亚群,频率,和功能通过流式细胞术。FNA样本中恢复的淋巴细胞计数中位数为2.01×10(5)(3.0×10(3)至2.25×10(6),n=38),恢复的CD4T细胞亚群中位数为5.94×10(4)(277至6.17×10(5),n=38)。尽管我们观察到从不同时间点采集的FNA样本的细胞亚群的频率有相对较大的变化,FNA样本的细胞亚群组成,特别是T细胞和CD4+T细胞频率,与整个切除的LN(n=6)大致相当,与外周血不同。CD4+T细胞的一个子集,几乎只位于次级淋巴组织,T滤泡辅助细胞(TFH),在LNFNA中很容易识别,并且TFH细胞频率与B细胞频率密切相关。使用多克隆SEB刺激证明了FNA淋巴细胞的体外功能,导致有反应的CD4+T细胞的中位数为6%,与循环CD4+T淋巴细胞相当。我们得出的结论是,使用FNA对猕猴LN进行连续采样是研究SIV感染的免疫发病机理的潜在有用方法,并且可能扩展到HIV感染。
    Lymphoid tissues are of intense interest for studies of the pathogenesis of human immunodeficiency virus (HIV) in humans and simian immunodeficiency virus (SIV) in macaques but are relatively difficult to sample non-invasively. Fine needle aspiration (FNA) cytology, conventionally a diagnostic procedure for lymphadenopathy, can be used for longitudinal study of tissue cell subsets during HIV/SIV infection. In this study, we serially sampled lymph node (LN) FNA from pigtail macaques and studied cell subsets in the aspect of absolute count, frequency, and functionality by flow cytometry. The median recovered lymphocyte count from FNA samples was 2.01×10(5) (3.0×10(3) to 2.25×10(6), n=38) and median CD4+ T cell subset recovered was 5.94×10(4) (277 to 6.17×10(5), n=38). Although we observed a relatively large variation in the frequencies of cell subsets of FNA samples taken from different time points, the cell subset composition of FNA samples, in particular T cell and CD4+ T cell frequencies, was broadly comparable to whole excised LNs (n=6) and distinct from peripheral blood. A subset of CD4+ T cells that is located almost exclusively in secondary lymphoid tissues, T follicular helper (TFH) cells, was readily identifiable in LN FNAs and the TFH cell frequencies were strongly correlated with B cell frequencies. In vitro functionality of FNA lymphocytes was demonstrated using polyclonal SEB stimulation, resulting in a median 6% of responding CD4+ T cells, comparable to circulating CD4+ T lymphocytes. We conclude that serial sampling of macaque LNs using FNA is a potentially useful method to study the immunopathogenesis of SIV infection and may be extended to HIV infection.
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