CT引导下穿刺活检及介入治疗的临床应用(附56例分析)

目的：探讨ＣＴ引导下穿刺活检及介入治疗的临床应用价值。方法：ＣＴ引导下行诊断目的２９例,治疗目的１７例,诊断及治疗双目的的１０例病人。穿刺部位包括胸部１７例,腹部２７例,躯干及四肢１２例,共５６例６０个病灶。ＣＴ扫描确定穿刺点、角度及深度。局麻进针后,ＣＴ再次扫描确认针尖到达预定位置再进行活检取材或介入治疗。结果：６０ 个病灶穿刺６１针次,穿刺一次成功率１００％ ,确诊率９７．４％ ,治疗有效率８８．９％ ,并发症５．４％ 。结论：ＣＴ引导下穿刺活检及介入治疗属微创伤性技术,简便易行,安全有效,成功率高,并发症少。     

趋化因子受体6基因与陕西汉中地区类风湿关节炎汉族人群相关性

目的探讨趋化因子受体6基因单核苷酸多态性位点与中国陕西汉中地区类风湿关节炎汉族人群的相关性。 方法采用病例-对照研究方法,收集768例RA患者和960例正常对照DNA样本;用聚合酶链反应（PCR）法扩增目的条带,使用单碱基延伸法（SnapShot）对rs1331301、rs1556413、rs3093024、rs1854853和rs3093023位点基因分型,分析与RA的相关性。 结果CCR6基因5个标签SNP位点均符合哈迪温伯格平衡（HWE）,RA组和对照组基因型差异均无统计学意义（P > 0.05）。rs3093024位点A等位基因（OR = 1.22、P = 0.003）,显性模式（OR = 1.33、P = 0.0048）RA组与对照组差异具有统计学意义。rs1854853位点A等位基因（OR = 1.20、P = 0.0067）,显性模式（OR = 1.35、P = 0.0063）,RA组与对照组差异具有统计学意义。rs3093023位点T等位基因（OR = 1.26、P = 0.0009）,显性模式（OR = 1.38、P = 0.0015）,隐性模式（OR = 1.33、P = 0.025）,RA组与对照组差异有统计学意义。rs1331301和rs1556413两个SNP位点等位基因和显性、隐性模式,RA组与对照组差异均无统计学意义。 结论CCR6基因rs3093023、rs3093024和rs1854853三个单核苷酸多态性位点,可能是陕西汉中地区汉族人类风湿关节炎的易感基因位点。     

要重视瘢痕子宫剖宫产的麻醉处理

我国孕妇剖宫产率高达30％以上,其原因除社会、经济因素外,主要是宫内胎儿窘迫指征放宽和择期反复剖宫产,还有治疗因素,曾有1例第二次剖宫产的女孩患白血病,     

Cardiac metabolism measured noninvasively by hyperpolarized 13C MRI.

Pyruvate is included in the energy production of the heart muscle and is metabolized into lactate, alanine, and CO(2) in equilibrium with HCO(3) (-). The aim of this study was to evaluate the feasibility of using (13)C hyperpolarization enhanced MRI to monitor pyruvate metabolism in the heart during an ischemic episode. The left circumflex artery of pigs (4 months, male, 29-34 kg) was occluded for 15 or 45 min followed by 2 hr of reperfusion. Pigs were examined by (13)C chemical shift imaging following intravenous injection of 1-(13)C pyruvate. (13)C chemical shift MR imaging was used in order to visualize the local concentrations of the metabolites. After a 15-min occlusion (no infarct) the bicarbonate signal level in the affected area was reduced (25-44%) compared with the normal myocardium. Alanine signal level was normal. After a 45-min occlusion (infarction) the bicarbonate signal was almost absent (0.2-11%) and the alanine signal was reduced (27-51%). Due to image-folding artifacts the data obtained for lactate were inconclusive. These studies demonstrate that cardiac metabolic imaging with hyperpolarized 1-(13)C-pyruvate is feasible. The changes in concentrations of the metabolites within a minute after injection can be detected and metabolic maps constructed.     

TNF-α对大鼠Leydig细胞的作用及机制研究

目的观察TNF-α对睾丸细胞功能的影响并探讨其可能机制。方法通过Percoll不连续密度梯度分离获取大鼠Leydig细胞进行原代培养。HE染色进行细胞形态学观察。Leydig细胞培养48h后在培养液中分别加入不同浓度的大鼠TNF-α,使其终浓度达到0.1、1、10、100ng/ml,分别在培养的第1、2、3、4天取上清,通过放免法测定上清液中睾酮的含量,应用MTT法测定细胞增殖情况,流式细胞术与丫啶橙(AO)染色检测及观察Leydig细胞凋亡情况。结果原代细胞通过提纯后的细胞纯度可达70%~80%。HE染色后可见细胞胞质含量丰富,含有分泌颗粒,胞核圆。TNF-α在0.1~100ng/ml浓度范围内能呈剂量依赖的方式抑制Leydig细胞睾酮的基础分泌。0.1、1、10、100ng/mlTNF-α作用24h后,对Leydig细胞睾酮分泌量的抑制率分别为22.03%、34.98%、52.95%、74.83%。各组Leydig细胞睾酮的分泌量随时间延长呈减少的趋势,但除100ng/ml组外,其他各组各时间点比较差异无统计学意义。高浓度TNF-α(10、100ng/ml)组具有抑制Leydig细胞增殖和促进其凋亡作用,其增殖抑制率分别达到38.35%±4.17%、76.35%±8.65%,而凋亡率分别为13.23%±1.11%、26.43%±5.82%,与对照组比较有统计学意义(P<0.01)。AO染色见高浓度TNF-α(10、100ng/ml)组出现明显的细胞凋亡。结论TNF-α对Leydig细胞睾酮的基础分泌具有抑制作用,在较高浓度时该作用可能与其抑制Leydig细胞增殖并促进细胞凋亡有相关。     

GDNF and BDNF alter the expression of neuronal NOS,c-Jun,and p75 and prevent motoneuron death following spinal root avulsion in adult rats

In the present study, we examined the effects of glial cell line-derived neurotrophic factor (GDNF), brain-derived neurotrophic factor (BDNF), ciliary neurotrophic factor (CNTF), and insulin growth factor (IGF-1) on adult motoneuron survival following spinal root avulsion. The expression of neuronal nitric oxide synthase (nNOS), c-Jun, and the low-affinity neurotrophin receptor (P75) following treatment with these neurotrophic factors was also examined. In control animals, approximately 80% of spinal motoneurons were nNOS positive at 3 weeks following the lesion, whereas in GDNF or BDNF treated animals no nNOS positive motoneurons were found at the same time point. Following injury and treatment with GDNF and BDNF increased numbers of motoneurons were c-Jun and P75 positive. By 6 weeks following the lesion, only approximately 28% of motoneurons persisted in control animals whereas about 90% of motoneurons survived injury following treatment with either GDNF or BDNF. In contrast, CNTF and IGF-1 were ineffective in either inhibiting nNOS expression or preventing motoneuron death. Our results provide in vivo evidence that the survival of injured adult mammalian motoneurons can be promoted by specific neurotrophic factors, and that this effect is associated with inhibition of nNOS expression and up-regulation of c-Jun and P75 expression.     

Digital reconstruction and donor site resurfacing: a two-flap technique

Use of a great toe pulp flap is one of the methods to repair partial soft-tissue defect of the thumb or other digits. However, the conventional application of free skin grafts to close the donor site may bring donor-site morbidity. The authors present a two-flap technique that a reverse first dorsal metatarsal artery (FDMA) flap resurfaces the defect of the free great toe pulp flap. Six patients with soft-tissue defects of the thumbs or fingers were treated with this technique. Both the pulp and reverse flaps survived uneventfully after reconstruction of the thumbs and fingers. The reverse flap to resurface the donor site on the great toe was sensate and durable. Satisfactory appearance and function were gained in all patients. Results revealed that this technique can be accepted as an alternative method when treating soft tissue defect of the thumb or finger.