Identifying the affected hemisphere by 1H-MR spectroscopy in patients with temporal lobe epilepsy and no pathological findings in high resolution MRI

Up to 30% of patients with temporal lobe epilepsy (TLE) remain without remarkable changes in MRI. In this study we investigated the role of (1)H-MR spectroscopy ((1)H-MRS) in lateralizing the affected hemisphere in the mentioned patient group. Twenty-two consecutive patients diagnosed with TLE were investigated by high resolution MRI and (1)H-MRS. We examined the incidence and diagnostic accuracy of temporal metabolite alterations determined by Linear Combination of Model Spectra (L C Model) via water reference. Metabolite values of each hemisphere of TLE patients were compared with healthy controls. Results of metabolite alterations were related to intensive video EEG focus localization. Reduction of N-acetylaspartate + N-acetylaspartyl-glutamate (tNAA) in the affected hemisphere revealed identification in six of nine patients (66%) with unilateral TLE. Group comparison revealed a significant reduction of tNAA (6.1+/-0.8*) in the involved temporal lobe compared with controls (6.67+/-0.4*, P=0.026). Choline levels were significantly increased in the affected hemisphere (1.42+/-0.17*) compared with healthy controls (1.22+/-0.17*, P=0.035). The results of our study show that (1)H-MRS is able to identify the affected hemisphere of MRI negative TLE patients and can be used as an additive tool in multimodal focus localization.     

局部物理加压预防全身麻醉术后下肢深静脉血栓形成的研究

目的评价局部物理加压预防全麻术后患者下肢深静脉血栓形成的疗效和安全性。方法入选全身麻醉手术患者345例，分为对照组、肝素组和物理加压组，各组间血栓形成风险差异无统计学意义。对照组无任何抗凝措施介入，肝素组使用低分子肝素抗凝治疗，物理加压组使用梯度压力弹力袜进行下肢局部加压。所有患者在术后第7天查双下肢深静脉血管超声，术后第3天测凝血酶原时间（PT）和部分凝血活酶时间（AFYF）。结果术后血管超声检查显示，肝素组和物理加压组下肢深静脉血栓形成的发生率明显低于对照组（P〈0．01），肝素组凝血酶原时间（PT）长于对照组和物理加压组（P〈0．05）。结论下肢局部物理加压是一种预防术后下肢深静脉血栓形成安全、有效的方法。     

兔局灶脑缺血后脑片[Ca~(2 )]i的变化

目的：研究脑缺血后脑片[Ca2＋]i变化。方法：采用新型Ca2＋荧光指示剂Fura－2双波长法测定兔大脑中动脉阻塞（MCAo）局灶脑缺血后脑片细胞内游离钙（[Ca2＋]i）。结果：脑缺血后脑组织[Ca2＋]i显著升高。结论：[Ca2＋]i在脑缺血损害中起重要作用。     

视网膜与脉络膜下液的丙二醛含量测定

我们对41例孔源性视网膜脱离(RD)和5例渗出性视网膜脱离(ERD)病人的视网膜下液(SRF)及7例内眼术后脉络膜脱离(CD)的脉络膜下液(SCF)中丙二醛进行了测定,以自身血清作对照。结果表明:丙二醛在ERD—SRF中含量最高(6.820±3.28mmol/L)、CD—SCF次之(2.001±0.63mmol/L)、RD—SRF中最低(0.537±0.34mmol/L)。二者间有显著性差异(P<0.01)。与自身血清中丙二醛含量比较,ERD—SRF显著的高浓度(P<0.01),RD—SRF显著的低浓度(P<0.01),CD—SCF无显著性差异(P<0.05)。     

RNA-DNA杂交法研究乳酸脱氢酶-C基因在睾丸中特异性表达

用同位32~P标记乳酸脱氢酶-C(LDH-C)cDNA作为探针,与小鼠胸腺、脑、胰、心肌、骨骼肌、睾丸、肾、肺、肝的RNA以及人胰、皋丸、肝、骨骼肌、心肌及脑的RNA分别作点溃杂交(dot blot hybridization)及Northern印迹杂交,证实LDH-C基因只在睾丸中特异性表达。     

慢性精神分裂症患者认知功能与ApoE基因的关联研究

目的：探讨慢性精神分裂症患者的易感性及其认知功能与ApoE基因之间的关系．方法：随机抽取61例住院的慢性精神分裂症病人作研究，以90例正常人作对照．用聚合酶链式反应（PCR）扩增技术及限制性片段长度多态性（RELPs）技术测定所研究对象的ApoE基因型和等位基因．结果：发现慢性精神分裂症与ApoE基因含等位基因ε3的基因型呈负关联，与等位基因ε2呈正关联，而认知功能与ApoE基因的基因型及等位基因均无关联．结论：ApoE基因与慢性精神分裂症的易感性有关，含等位基因ε3的基因型是慢性精神分裂症的保护因子，等位基因ε2是慢性精神分裂症的风险因子，而ApoE基因在慢性精神分裂症认知功能障碍的发生中不起重要作用．     

山东省1995年脊髓灰质炎监测报告

自１９９１年４月以来，通过对报告的急性弛缓性麻痹（ＡＦＰ）病例和病人接触者的粪便标本检测，山东省未发现脊髓灰质炎（脊灰）野病毒。自１９９２年开始引用世界卫生组织（ＷＨＯ）的诊断标准，每年均有一定数量的临床确诊脊灰病例。ＷＨＯ提出，分离到野病毒作为唯一的确诊依据，在消灭脊灰后期很有必要。卫生部提出，在ＷＨＯ推荐标准基础上结合专家组诊断意见，能保证临床符合病例具有较高特异性。山东省所有确诊脊灰病例均由专家组诊断，对专家组诊断的临床脊灰病例仍应引起高度重视，以便综合分析是否有野病毒引起的可能。１５岁以下儿童非脊灰ＡＦＰ病例报告发病率已连续３年达到１／１０万的指标，ＡＦＰ病例的粪便标本采集率达到８０．２％，与医院的及时报告率提高有密切关系。受病例麻痹到就诊的时间间隔和其它客观因素的影响，麻痹两周内采集到合格粪便标本的期望比例为９３．５％，市、县两级医院能否及时报告和采便是提高监测系统敏感性和质量的关键。报告ＡＦＰ病例中经省专家组诊查剔除非ＡＦＰ病例１９１例，占报告病例的３１．２％。在强调监测敏感性的同时，也应注意提高监测工作的特异性，以全面提高监测工作的质量。     

Effects of buffering in hypercapnia and hypercapnic hypoxemia

Anesthetized, paralyzed and mechanically ventilated pigs were exposed to extreme hypercapnia (Paco_2-20 kPa) at Fio₂ 0.4 for 480 min, with (n = 6) or without (n = 6) continuous infusion of isotonic buffers (bicarbonate and trometamol). Arterial pH was higher in buffered animals than controls, 7.21 ±0.01 vs 7.01±0.01 (mean ± s.e.mean, P < 0.01). Serum osmolality and Paco₂ did not differ between groups throughout the experiment. The hemodynamic response to hypercapnia was attenuated in the buffered group, who had lower heart rate, 133 ± 6 vs 189±12 min^-1 (P < 0.01), mean arterial pressure (MAP) 109 ± 4 vs 124 ± 4 mmHg (14.5 ± 0.5 vs 16.5 ± 0.5 kPa) (P < 0.05), mean pulmonary arterial pressure 16±1 vs 23 ± 1 mmHg (2.1 ±0.1 vs 3.1 ±0.1 kPa) (P < 0.01), and pulmonary vascular resistance (PVR) 249 ± 21 vs 343 ± 20 dyn s-cm^-5 (2490±210 vs 3430±200 μN-s-cm^-5) (P < 0.01), compared with the control group. Subsequently, both groups were exposed to hypercapnic hypoxemia by stepwise increases in Fio₂ (0.15, 0.10, 0.05) at 30-min intervals, while Fico₂ was kept at 0.2. PVR increased in both groups (P < 0.05) but, except for heart rate, all hemodynamic differences between the groups disappeared during hypoxia. At Fio₂ 0.15, buffered animals had higher arterial oxygen saturation (73 ± 5%) than the controls (55 ± 5%), (P < 0.05). The control animals died after 1–29 min (mean 14 min) at Fio₂ 0.10, while all buffered animals survived Fio₂ 0.10 with stable MAP (122 ± 14 mmHg (16.3 ± 1.9 kPa). The buffered animals died after 4–22 min (mean 15 min) at Fio₂ 0.05. We conclude that buffering to a pH of 7.21 attenuates the observed hemodynamic response in extreme hypercapnia and improves survival in hypercapnic hypoxemia.