高压氧对心肌梗死大鼠模型梗死面积及左室功能的影响

Objective To investigate effect of hyperbaric oxygen treatment on infarct size of acute myocardial infarction and on the function of left ventricle in rats. Methods An acute myocardial infarction model was developed by using 50 male SD rats, which were randomly divided into 3 groups: the sham group(12 rats), the acute myocardial infarction group (AMI) (16 rats) and the HBO group(17 rats). Hyperbaric oxygen treatment was applied to the HBO group for a succession of 7 days. Infarct sizes, differences between systolic and diastolic pressures of the three groups and changes in cardiac hemodynamics (± dp/dtmax) were measured 7 days after treatment. Results When compared with that of the AMI group, infarct size and left ventricle function of the HBO group improved significantly (P < 0. 05). Conclusions Early administration of HBO could significantly reduce infarct size and improve left ventricle function of rats with AMI.     

不同高压氧治疗方案对急性一氧化碳中毒受损心肌的疗效分析

Objective To investigate the effects of different hyperbaric oxygen ( HBO) treatment profiles on damaged myocardium induced by acute carbon monoxide poisoning. Methods One hundred and fifty-five serious cases of acute carbon monoxide ( CO) poisoning admitted into the hospital for treatment from October 2006 to March 2010 were randomly divided into the routine HBO treatment group (the routine group,75 cases) and the improved HBO treatment group (the improved group,80 cases). The treatment profile of the routine HBO treatment group: the patients were compressed for 20 min to the treatment pressure of 0.25 Mpa. Following stabilization at the said pressure, the patients breathed oxygen twice for 30 min plus 10 min, once a day. The whole treatment course consisted of 12 sessions, with the patients receiving HBO treatments from 9 to 68 times. The treatment profile of the improved HBO treatment group: the patients were given routine HBO treatment in the first 5 days, then, received improved HBO treatment, with a treatment profile of lower pressure (0.20 Mpa) , shorter oxygen-breathing time, lengthening of oxygen-breathing intervals and intermittent oxygen breathing. Total oxygen-breathing time was 4 times, each for 10 min plus 3 times each for 5 min. Then, the patients were decompressed to the surface following 20-min oxygen-breathing decompression. The patients received treatment for a succession of 3 days, then, had 1-day interval, and the whole treatment course consisted of 10 sessions. Changes in ST-T and myocardial enzymes of both the routine HBO treatment group and the improved HBO treatment group were measured and analyzed. Results ST-T recovery rate of the improved HBO treatment group increased (56% ,28% ) obviously, when compared with that of the routine HBO treatment group(P ＜ 0. 05). ST-T worse rate decreased significantly following HBO treatment on the 3rd and 6th days (21% and 25% on the 3rd day, 16% and 27% on the 6th day) respectively (P＜0.01). Statistical differences could be seen in the myocardial recovery rate and worse rate, when a comparison was made between them (P＜0. 05, P＜0. 01). Conclusions The improved HBO treatment profile showed better therapeutic effect on damaged myocardium induced by CO poisoning. This treatment profile should be used instead of other treatment profiles.     

辛伐他汀预处理减轻缺血再灌注心肌损伤的实验研究

Objective To investigate the effects of pretreatment with simvastatin on iscbemia reperfusion induced myocardial injury, and to further explore related mechanism with respect to inflammation modulation. Methods The rat myocardial ischemia reperfusion model was established by the method of coronary artery ligation. The animals were divided into 3 groups: the sham group, the control group and the simvastatin group. In the simvastatin group, the animals were pretreated with simvastatin (5 mg/kg) one week before by intragastric administration. Ventricular arrhythmia was monitored and scored, infarct size and area at risk of myocardium were determined, and uhrastructural changes were observed. The serum levels of myocardial enzymes and lipids were measured. The content of myocardial inflammatory cytokines [tumor necrosis factor (TNF) -α、interleukin(IL) -6, and monocyte chemoattractant protein(MCP) - 1]were also evaluated. Results When compared with those of the control group, the amount and duration of ventricular arrhythmia in simvastatin group were less and score of ventricular arrhythmia was significantly lower. When pretreated with simvastatin, the serum levels of CK-MB and LDH in simvastatin group were significantly lower than those of the control group. The infarct size/area at risk ratio of the simvastatin treated group was significantly less than those of the control group. The uhrastructures of myocardial cells were better maintained in simvastatin group. No significant differences were observed in the serum concentrations of total cholesterol, triglycerides, low density lipoprotein and high density lipoprotein when comparisons were made each other among the three groups. However, the levels of TNF-α,IL-6 and MCP-1 in heart tissue of the treated animals were significantly lower than those of the control group. Conclusions Pretreatment with simvastatin ameliorates ischemia reperfusion induced myocardial injury, which is partly related with the down-regulation of inflammatory cytokines expression in heart tissue but independent of its role of lipids modulation.     

辛伐他汀预处理减轻缺血再灌注心肌损伤的实验研究

Objective To investigate the effects of pretreatment with simvastatin on iscbemia reperfusion induced myocardial injury, and to further explore related mechanism with respect to inflammation modulation. Methods The rat myocardial ischemia reperfusion model was established by the method of coronary artery ligation. The animals were divided into 3 groups: the sham group, the control group and the simvastatin group. In the simvastatin group, the animals were pretreated with simvastatin (5 mg/kg) one week before by intragastric administration. Ventricular arrhythmia was monitored and scored, infarct size and area at risk of myocardium were determined, and uhrastructural changes were observed. The serum levels of myocardial enzymes and lipids were measured. The content of myocardial inflammatory cytokines [tumor necrosis factor (TNF) -α、interleukin(IL) -6, and monocyte chemoattractant protein(MCP) - 1]were also evaluated. Results When compared with those of the control group, the amount and duration of ventricular arrhythmia in simvastatin group were less and score of ventricular arrhythmia was significantly lower. When pretreated with simvastatin, the serum levels of CK-MB and LDH in simvastatin group were significantly lower than those of the control group. The infarct size/area at risk ratio of the simvastatin treated group was significantly less than those of the control group. The uhrastructures of myocardial cells were better maintained in simvastatin group. No significant differences were observed in the serum concentrations of total cholesterol, triglycerides, low density lipoprotein and high density lipoprotein when comparisons were made each other among the three groups. However, the levels of TNF-α,IL-6 and MCP-1 in heart tissue of the treated animals were significantly lower than those of the control group. Conclusions Pretreatment with simvastatin ameliorates ischemia reperfusion induced myocardial injury, which is partly related with the down-regulation of inflammatory cytokines expression in heart tissue but independent of its role of lipids modulation.     

不同压力高压氧治疗对大鼠脊髓损伤后细胞凋亡的影响

目的 观察不同压力的高压氧(HBO)对大鼠脊髓损伤(spinal cord injury,SCI)后细胞凋亡的影响,探讨HBO治疗SCI的最佳压力.方法 90只SD大鼠采用Allen's打击法造成SCI后随机分为5组:对照组(A组)、0.15 MPa HBO组(B组)、0.20 MPa HBO组(C组)、0.22 MPa HBO组(D组)和0.25 MPa HBO组(E组).损伤后第3、7、14天分别对5组大鼠进行取材,采用Tunel法检测凋亡细胞,光镜下观察,并对结果进行统计学分析;神经功能评价采用开放场地实验评估大鼠后腿运动功能(BBB评分).结果 与A组比较,HBO各压力组在3个时间点凋亡的细胞数有所减少,神经功能有所改善,且差异有统计学意义(P＜0.05).与B组比较,C、D和E组凋亡的细胞数有所减少,BBB评分改善,且差异有统计学意义(P＜0.05).与C组比较,E组于第3和第7天的差异有统计学意义(P＜0.05);第14天的差异无统计学意义(P＞O.05).结论 HBO能抑制SCI后细胞的凋亡,其作用在一定范围内与压力的升高相关.

Abstract：

Objective To study the effects of HBO at different pressures on apoptosis following spinal cord injury in rats and also to investigate ideal pressure value of hyperbaric oxygen(HBO) on spinal cord injury (SCI). Methods The SCI model was established with Allen's weight dropping by using 90 SD rats. Then, the animals were randomly divided into 5 groups following SCI: the control group ( group A); the HBO treatment group at 0. 15 Mpa (group B); the HBO treatment group at 0. 20MPa (group C); the HBO treatment group at 0. 22 Mpa ( group D); the HBO treatment group at 0.25 Mpa ( group E). Segments of injured spinal cord were collected from the animals of the 5 groups for studies on the 3rd, 7th, and 14th days after injury. The apoptosis cells were labeled with Tunel and the neurologic function of the spinal cord was assessed in the open field ( the BBB score ). Results The number of Tunel - positive cells decreased considerably and the BBB score improved significantly in all the animals of the HBO groups when compared with those of group A ( P ＜ 0. 05 ). Same results were found when the group C, group D and group E were compared with group B, with statistical significance( P ＜0. 05). The number of Tunel-positive cells were decreased considerably and the BBB score improved significantly on 3rd and 7th days in group E, when compared with those of group C( P ＜ 0. 05 ), with statistical significance( P ＜ 0. 05 ). However, no statistical significance could be noted on the 14th day (P ＜0.05). Conclusions HBO could inhibit apoptosis in rats following spinal cord injury, which might be correlated with the increase of pressure within a certain range.     

不同高压氧治疗方案对急性一氧化碳中毒受损心肌的疗效分析

目的 探讨不同高压氧(hyperbaric oxygen,HBO)治疗方案对急性一氧化碳(carbon monoxide,CO)中毒受损心肌的影响.方法 对2006年10月至2010年3月收治的155例重症CO中毒患者进行HBO常规治疗(常规组,75例)和HBO改进治疗(改进组,80例).(1)常规组治疗方案:治疗压力0.25 MPa,加压20 min,稳压后吸氧2次,每次30 min,中间间歇10 min,减压20 min出舱.每日1次,12次为1个疗程,治疗9-68次.(2)改进组方案:前5 d采用HBO常规治疗,以后采用减小治疗压力、缩短吸氧时间、增加吸氧间隔、间歇给氧的治疗方案,治疗压力0.20 MPa,稳压吸氧4次,每次10min,中间间歇5 min,减压20 min出舱.连续治疗3 d后间隔1 d,10 d为1个疗程.2组患者使用相同的药物治疗方案.统计分析常规组和改进组ST-T变化及血清心肌酶变化.结果 改进组与常规组相比ST-T恢复率(56%,28%)明显升高(P＜0.05),HBO治疗第3天和第6天ST-T加重率(第3天21%、25%.第6天16%、27%)明显降低(P＜0.01);2组血清心肌酶恢复率和加重率比较差异有统计学意义(P＜0.05.P＜0.01).结论 HBO改进方案对CO中毒患者受损心肌疗效较好.

Abstract：

Objective To investigate the effects of different hyperbaric oxygen ( HBO) treatment profiles on damaged myocardium induced by acute carbon monoxide poisoning. Methods One hundred and fifty-five serious cases of acute carbon monoxide ( CO) poisoning admitted into the hospital for treatment from October 2006 to March 2010 were randomly divided into the routine HBO treatment group (the routine group,75 cases) and the improved HBO treatment group (the improved group,80 cases). The treatment profile of the routine HBO treatment group: the patients were compressed for 20 min to the treatment pressure of 0.25 Mpa. Following stabilization at the said pressure, the patients breathed oxygen twice for 30 min plus 10 min, once a day. The whole treatment course consisted of 12 sessions, with the patients receiving HBO treatments from 9 to 68 times. The treatment profile of the improved HBO treatment group: the patients were given routine HBO treatment in the first 5 days, then, received improved HBO treatment, with a treatment profile of lower pressure (0.20 Mpa) , shorter oxygen-breathing time, lengthening of oxygen-breathing intervals and intermittent oxygen breathing. Total oxygen-breathing time was 4 times, each for 10 min plus 3 times each for 5 min. Then, the patients were decompressed to the surface following 20-min oxygen-breathing decompression. The patients received treatment for a succession of 3 days, then, had 1-day interval, and the whole treatment course consisted of 10 sessions. Changes in ST-T and myocardial enzymes of both the routine HBO treatment group and the improved HBO treatment group were measured and analyzed. Results ST-T recovery rate of the improved HBO treatment group increased (56% ,28% ) obviously, when compared with that of the routine HBO treatment group(P ＜ 0. 05). ST-T worse rate decreased significantly following HBO treatment on the 3rd and 6th days (21% and 25% on the 3rd day, 16% and 27% on the 6th day) respectively (P＜0.01). Statistical differences could be seen in the myocardial recovery rate and worse rate, when a comparison was made between them (P＜0. 05, P＜0. 01). Conclusions The improved HBO treatment profile showed better therapeutic effect on damaged myocardium induced by CO poisoning. This treatment profile should be used instead of other treatment profiles.     

去铁胺对大鼠脑室出血后慢性脑积水的疗效观察

Objective To discuss the effect of deferoxamine in the treatment of chronic hydrocephalus (CH) after intraventricular hemorrhage (IVH) in rats. Methods A total of 184 female Sprague Dawley rats were randomly divided into normal saline group ( NS group), intracerebroventricular blood infusion group (Group A ) and deferoxamine plus intracerebroventricular blood infusion group ( Group B). The rat CH models were made by infusing autologous whole blood ( 130 μl) into the right lateral cerebral ventricle. The escape latency time was detected by Morris water maze at days 14 and 28.The rats were sacrificed 1,3, 7, 14, 28 days later, the transverse diameter of the lateral ventricle on the coronal slice of rat brain 0.4 mm posterior to the bregma was measured for evaluation of hydrocephalus and the index of ventricle. Pathological changes of the brain were observed. Results No CH was found in the NS group. The incidence of CH in the Group A was 73% (11/15), which was significantly higher than 27% (4/15) in Group B at day 28. The escape latency time in the NS group was (8.21 ± 2.00) s,which was significantly shorter than ( 16.36 ±5.93 ) s of the Group A ( P ＜0.01 ). There was no significant difference in the escape latency time between the NS group and Group B [(11.38 ± 2.57 )s] (P ＞0.05 ). The index of ventricle in the NS group was 1.05 ± 0.41, which was smaller than 4.53 ± 1.70 in Group A and 2.77 ± 1.53 in Group B (P ＜ 0.05 ). There were no obvious pathological changes in the NS group at different time points. There found edema of white matter surrounding the ventricle, twist and engorged callosum, proliferation of rhagiocrine cell as well as hemosiderin deposit in Group A. However, no hemosiderin deposit was found in Group B. Conclusions The content of iron in the cerebrospinal fluid may be correlated with hydrocephalus after IVH. Preventive use of deferoxamine can reduce incidence of hydrocephalus after ICH.     

富氧吸入对大鼠模拟急性高原肺水肿的防护作用

Objective To investigate the protective effects of oxygen enrichment inhalation on preventing acute high altitude pulmonary edema (HAPE) of rats and compare the effects of various oxygen inhalations. Methods Forty-four male Wistar rats were randomly and averagely divided into control, hypoxia, fulltime oxygen enrichment and nocturnal oxygen enrichment groups. Rats with various inhalations were exposed to simulated 6000 m in hypobaric chamber for 48 h except control group..The wet to dry ratio (W/D), protein concentration of bronchoalveolar lavage fluid (BALF),nitric oxide (NO) content and nitric oxide synthase (NOS) activity in serum and lung homogenate were measured, and lung histological change was determined. Results Comparing with control group, hypoxia group showed significantly increased W/D, BALF protein concentration and decreased NO level and NOS activity (P＜0.01). Interstitial pulmonary edema, haemorrhage and neutrophil infiltration were found in hypoxia group. W/D and BALF protein concentration both in fulltime oxygen enrichment and nocturnal oxygen enrichment groups were decreased compared with those in hypoxia group (P＜0. 05), while the level of NO and the activity of NOS were increased (P＜0. 01).Conclusions Oxygen enrichment inhalation has the protective effects on preventing HAPE by improving NO level and NOS activity. There is no significant different protective effect between fulltime oxygen enrichment and nocturnal oxygen enrichment groups.     

高压氧治疗兔创伤性脑损伤的磁共振观察

Objective To observe the effects of HBO therapy on cerebral edema, blood-brain barrier and neural behavioral scores, induced by brain trauma injury in rabbits with magnetic resonance imaging ( MRI). Methods Twenty-four rabbits were randomly divided into three groups: the sham operation group (n =5), with a skull window of only 8 mm in diameter; the control group (n = 10) , sustained with shock injury (shock intensity of 0.2 Mpa) following skull fenestration; the HBO group(n=90), also sustained with shock injury following skull fenestration, but with HBO treatment. Following the development of the model, MRI scans were made at 6th, 24th, 72nd, and 120th hours to calculate the volume of cerebral edema, apparent diffusion coefficient ( ADC), and neurological behavioral scores. Results After HBO treatment, neurological behavioral scores of the HBO group improved significantly, when compared with that of the control group (P＜ 0. 05). MRI showed that abnormality was not noted in the sham operation group. Before treatment, significant cerebral edema and damage of blood-brain barrier could be seen in both the HBO group and the control group. However, following HBO treatment, cerebral edema and blood-brain barrier damage of the HBO group recovered more rapidly, when a comparison was made between the groups (P＜0. 01) and ADC value of the HBO group was lower than that of the control group (P＜0. 05). Conclusions HBO could hasten recovery of the blood-brain barrier damage induced by cerebral damage with hydraulic impetus, reduce cerebral edema, significantly decrease symptoms of brain injury, and reduce disability rate.     

Effects of hyperbaric oxygen on TF、TNF-α in the rabbit model of steroid-induced avascular osteonecrosis of femoral head

Objective To investigate dynamic changes in serum TF and TNF-α in the rabbit model of steroid-induced avascular osteonecrosis of femoral head ( SANFH) and also to explore the mechanism of SANFH, as well as effects of hyperbaric oxygen ( HBO) on SANFH. Methods Seventy-eight New Zealand male rabbits were randomly divided into 3 groups:the normal control (group N) (7 animals), the model group (group M) (41 animals) and the HBO group (group H) (30 animals). The model group was subdivided into the immediate model group (the M0 group) (10 animals), the two-week model group (the M2 group) (10 animals), the four-week model group (the M4 group) (10 animals) and the six-week model group (the M6 group) (11 animals). The HBO group was further divided into the 2-week HBO therapy group (HBO2) (7 animals), the 4-week HBO therapy group (HBO4) (11 animals) and the 6-week HBO therapy group (HBO6) (12 animals). Through injection of endotoxin and methyl-prednisolone, rabbits in the group HBO2, HBO4 and HBO6 received HBO therapy 1 hour daily from the second day of the experiment. The durations of HBO therapy were 2 weeks ( HBO2), and 4 weeks respectively. The animals were sacrificed after blood samples were taken at respective blood collection time. Then, levels of TF, TNF-α in the serum were measured and the histological changes in the femoral heads were observed. Results Levels of TF and TNF-α in group M0 increased significantly, when compared with those of group N (P ＜0. 05 or P ＜0.01), while for the HBO subgroups the expression of TF and TNF-α measured at the same time points all decreased, when compared with that of the model subgroups (P＜0. 05 or P ＜0.01). To elaborate, TF levels in group M2 and M4 were much higher than those in group HBO2 and HBO4 ( P＜0. 01 ). TF level in group M6 was higher than that in group HB06 ( P ＜ 0.05). TNF-α in group M0 also increased significantly, when compared with that in group N( P ＜0.01). TNF-α levels in group M2 and M6 were also much higher than those in group HBO2 and HBO6 ( both P ＜0. 01 ). TNF-α in group M4 was higher than that in group HBO4 (P＜0.01). Histological examination revealed that tissues of the femoral heads in group N were normal, osteonecrosis and thrombus could be noted in group M2 and M4, hyperplasia fibrosis could be found in group M6, and osteonecrosis in HBO2 and HB04 groups seemed less severer than that in M2 and M4 groups, no thrombi in HBO2, HBO4 groups were noted, and growth of new bones were detected in HBO4 and HBO6. Conclusions The levels of TF and TNF-α levels increased in the rabbit model of SANFH, inducing blood coagulation. Thrombosis at the femoral heads was one of the causes of SANFH. HBO therapy could inhibit the release of TF and TNF-α, thus improving the abnormality of blood coagulation and enhancing treatment of osteonecrosis.     

Studies on the electrodeposition of uranium on aluminium

The electrodeposition method has been used to prepare thick sources of uranium on aluminium. By applying high current density in the ammonium oxalate solution (0.2 M, pH 9.0), containing ²³³U, strongly adherent layers of uranium (0.8 mg/cm²) are deposited. The electrodeposited species is found to be U(IV)-oxalate complex.     

戊二醛消毒剂在内镜消毒的效果观察

目的:观察戊二醛消毒剂对内镜消毒的效果.方法:采用安必洁多酶清洗液清洗,2%碱性戊二醛消毒剂浸泡内镜15min并检测其杀菌效果,与传统的NCX 12-Ⅱ型自动超声雾化内镜消毒机和HJ 31型内镜自动洗消机清洗消毒法进行比较.结果:2%碱性戊二醛消毒剂消毒的内镜,其细菌、病毒的检出率均低于传统清洗消毒法,χ2 =310.526,P＜0.001.结论:用2%碱性戊二醛消毒液进行内镜消毒可降低交叉感染的机率,从而达到高标准的消毒要求.     

医院船手术台合理配置研究

目的预计不同规模医院船手术台昼夜伤员通过量，提高医院船手术能力的组织指挥方法。方法运用随机服务系统理论对医院船手术台利用排队系统进行研究。结果模拟了不同手术台昼夜伤员通过量，提出了不同床位医院船手术台配置理论值，指出了提高医院船手术伤员通过量的措施。结论排队论理论在医院船手术台配置与利用中的运用，创新了手术台昼夜伤员通过量传统理论值，丰富了卫勤组织指挥理论。     

微波照射乳房促进产后泌乳效果的研究

 目的 观察微波照射乳房对促进产后泌乳的效果,并探讨其临床价值.方法 依照纳入标准随机选取产妇160例分别置入对照组、口服催乳糖浆组、微波治疗组,口服催乳糖浆+微波治疗组,口服催乳糖浆组产后当日口服催乳糖浆20 ml,1/8 h,共3 d.微波治疗组产后当日予以双侧乳房微波照射30 min,2/d,共3 d.口服催乳糖浆+微波治疗组产后当日口服催乳糖浆并予以双侧乳房微波照射3 d.观察四组产后第1天和第3天的泌乳情况、血清PRL水平及乳腺炎的发生情况.结果 产后第3天产妇的乳汁分泌及血清PRL水平口服催乳糖浆+微波治疗组>口服催乳糖浆组和微波治疗组>对照组(P<0.01),乳腺炎的发生率对照组和催乳糖浆组>微波治疗组和口服催乳糖浆+微波治疗组(P<0.01).结论 微波照射乳腺可以增加产后乳汁的分泌同时降低乳腺炎的发生率.     

咽鼓管表面活性物质成分的研究

目的通过动物实验，初步探讨咽鼓管表面活性物质的有效成分。方法杂色豚鼠15只，活杀断头暴露咽鼓管咽口，生理盐水冲洗咽鼓管，每次0．1ml，反复10次。冲洗液标本分为两组（原液组和备份组），每组5份。备份组给予二倍体积的氯仿／甲醇（2：1，V／V）混合液，进行磷脂和蛋白的分离、提取和预处理。采用首都儿科研究所研制的可控闭泡式表面张力测定仪进行活性测试，由可读显微镜和计算机算出最大表面张力（γmax）、最小表面张力（γmax）及稳定系数（S）。结果生理盐水组γmax、γmin均为最大，而S最小；原液组γmax、γmin最小，S大于生理盐水组但低于蛋白组和磷酯组；磷脂组γmax、γmin介于原液组与生理盐水组之间，与原液组接近；蛋白组γmax接近盐水组，γmin仅略大于原液组，S明显大于其它组。结论豚鼠咽鼓管内确有表面活性物质存在和作用，蛋白和磷脂协同作用形成了降低表面张力的活性特性。咽鼓管表面活性物质相关蛋白在其中不仅起着促进稳定的协同作用，同时具有降低表面张力的活性。     

姜素预防犬运动病的效果观察

目的　观察姜素预防犬运动病的效果和对豚鼠视前庭相互作用的影响。　方法　采用随机双盲和安慰剂对照实验设计 ,观察 7 2mg/kg ,3 6mg/kg和 1 8mg/kg 3种剂量姜素及苯海拉明 (乘晕宁 3 2mg/kg)、盐酸苯环壬酯 (飞塞乐 0 2mg/kg)对犬运动病预防效果和对豚鼠视前庭系统的影响。犬运动病采用三角离心摆动方式 (峰速 2 4 0°/s ,频率 0 0 5Hz)诱发 ,以一定时间内犬的呕吐发生率作为犬运动病的观察指标 ;以正弦摆动 (峰速 6 0°/s,频率 0 0 5Hz)加光条刺激方式诱发豚鼠视前庭相互作用眼震 ,以眼震次数、慢相速度和增益作为视前庭相互作用观察指标。　结果　 3种剂量姜素均可显著降低犬呕吐发生率 ,且在 7 2mg/kg和 3 6mg/kg剂量时其效果较苯海拉明、盐酸苯环壬酯显著 ,各种药物对豚鼠VVOR眼震均无显著影响。　结论　姜素用于预防对抗运动病效果显著且不会影响正常的视前庭功能     

护耳器对次声防护效果的观察

目的 观察几种护耳器(耳塞、耳罩)对次声发生器次声场的隔声效果。方法 在次声发生器工作现场，采用挪威840型实时分析仪，分别测量B．K．4128型模拟头裸耳(无防护)和闭耳(佩戴护耳器)2种状态下的线性声压级(dBSPL)、A声级(dBA)、次声级及4～20000Hz1／3倍频程声压级，2种状态声压级的差值为护耳器的隔声值。结果 3种耳塞对次声的隔声值为16．4～19．4dB，对线性声压级和A声级的隔声值比较接近，分别为20．0～21．6dB和23．0～25．6dBA；两种子罩对次声基本无防护效果，隔声值分别为0．4dB和—0．3dB，对线性声压级的隔声值分别为7．2dB和3．2dB，对A声级的隔声值分别为22．4dBA和19．5dBA；耳塞 耳罩复合防护，对次声频和低频声防护无相加效果，隔声值主要取决于耳塞的隔声性能，但对中、高频声有明显的相加隔声效果。结论 耳塞比耳罩对次声暴露有更好的防护效果。     

百赛诺对乙型肝炎的临床疗效观察

目的 :了解百赛诺 (双环醇 )对慢性乙型肝炎的临床疗效。方法 :应用百赛诺治疗 2 2例慢性乙型病毒性肝炎患者 ,总结分析其治疗前后肝功能、HBVDNA、HBV抗原抗体变化。结果 :2 2例慢性乙型肝炎患者服用百赛诺 3个月后ALT明显下降 ,与服药前相比有显著性差异 (5 4 82± 3 4 68vs14 2 0 5± 71 4 8,P <0 0 1) ;AST明显下降 ,与服药前相比具有明显差异 (68 64± 5 1 4 7vs93 82± 5 1 19,P <0 0 5 )。半年疗程后复查ALT仍低于服药前 (5 6 5 5± 64 0 2vs14 2 0 5±71 4 8,P <0 0 1) ,AST仍保持在较低水平。 2 2例病人中 ,半年疗程后及停药 3个月后共有 4例发生HBeAg转换 ,由HBeAg( )变为HBeAb( ) ,有 2例HBVDNA转阴 ,另有 2例HBVDNA定量明显下降。结论 :百赛诺具有明显的降酶护肝作用 ,可能有一定的抗病毒作用。     

萘莫司他对创伤性胰腺炎大鼠的治疗作用研究

目的考察胰蛋白酶抑制剂萘莫司他（FUT-175）对创伤性胰腺炎大鼠的治疗作用。方法采用压缩气流冲击法建立创伤性胰腺炎大鼠模型,以生理盐水和加贝酯分别作为阴性和阳性对照,考察FUT-175在造模后1 h腹腔注射给药后大鼠的生存率、血清淀粉酶和脂肪酶水平,以及胰腺组织病理学改变情况。结果与模型组相比,腹腔注射FUT-175后可显著提高创伤性胰腺炎大鼠生存率（60% vs.30%）,降低血清淀粉酶[（3030.8±869.4）vs.（6126.5±791.3）U/L]和脂肪酶水平[（203.4 ± 62.5）vs.（646.5 ± 99.3）U/L],同时有效减轻胰腺组织损伤;与阳性对照药加贝酯相比,FUT-175给药后大鼠的生存率更高（60%vs.40%）,血清淀粉酶[（3030.8±869.4）vs.（4111.4 ± 683.1）U/L]和脂肪酶水平更低[（203.4 ± 62.5）vs.（336.7±70.2）U/L]。结论胰蛋白酶抑制剂FUT-175对创伤引起的急性胰腺炎大鼠具有明显的治疗作用,值得进一步研究。