共查询到20条相似文献，搜索用时 717 毫秒
1.
2,6-二甲苯胺噻嗪(rompun,xylazine),广泛用于马、牛、羊、犬、猫、兔等多种动物的麻醉.例如2,6-二甲苯胺噻嗪复合麻醉剂对犬呼吸系统影响的评价[1].但是其作用机制却未见报道,本试验通过研究2,6-二甲苯胺噻嗪对大鼠不同脑区Na+-K+-ATP酶活性的影响,揭示2,6-二甲苯胺噻嗪复合麻醉剂对中枢神经系统钠、钾泵的作用机制,以阐明其麻醉作用对跨膜信号转导机制的影响,为今后α2-受体激动剂合理应用于临床建立理论依据与参考标准. 相似文献
2.
为探讨2,6-二甲苯胺噻嗪麻醉对大鼠机体的影响,本试验对30只wistar大鼠腹腔50mg/kg注射2,6-二甲苯胺噻嗪,检测单纯使用2,6-二甲苯胺噻嗪麻醉时,血液中钙离子、钾离子和钠离子的浓度变化.分别于麻醉前,麻醉诱导期、麻醉期、麻醉恢复期Ⅰ、麻醉恢复期Ⅱ断头取血,使用分光光度计测定离子的浓度变化.结果证明,2,6-二甲苯胺噻嗪麻醉对大鼠血液中离子的含量存在影响. 相似文献
3.
为研究噻环乙胺对大鼠不同脑区腺苷酸环化酶（AC）活性及3’、5’-环腺苷酸（cAMP）含量的动态影响,将168只SD大鼠随机均分为2大组,分别测定脑AC活性及cAMP含量。每大组分为对照组和低、高剂量噻环乙胺组（腹腔注射30、60 mg.kg-1）,每个剂量组又随机均分为麻醉组、恢复Ⅰ组和恢复Ⅱ组3个亚组。用放射免疫法测定脑组织AC活性、cAMP含量。结果表明：在两剂量的麻醉组不仅大脑皮层、丘脑的AC活性明显增强,而且上述脑区cAMP含量显著升高（与对照组相比,P〈0.05）。在高、低剂量的恢复Ⅰ组上述两脑区的AC活性、cAMP含量均有不同程度的下降,其中高剂量组下降极显著（与麻醉组相比,P〈0.01）,恢复Ⅱ组明显下降（与麻醉组相比,P〈0.01）。两剂量组对大鼠海马、脑干及小脑等脑区的AC活性、cAMP含量均无明显的影响。结果提示：AC、cAMP可能在噻环乙胺全麻作用产生的分子机理中发挥重要作用。噻环乙胺麻醉作用可能与提高大脑皮层、丘脑的AC活性,增加cAMP含量相关。 相似文献
4.
研究隆朋对大鼠不同脑区抑制性单胺类神经递质含量的变化影响,探讨隆朋麻醉作用机制。本试验将32只大鼠随机分为四组,分别为对照组,麻醉组,恢复Ⅰ组和恢复Ⅱ组,使用高效液相色谱法检测不同麻醉时期不同脑组织的5-羟色胺(5-HT)和5-羟吲哚乙酸(5-HIAA)的含量。结果隆朋作用后,大鼠大脑皮层、海马和丘脑5-HT和5-HIAA含量分别升高,且差异极显著。表明这三个脑区是隆朋作用脑组织的靶位区,由此推断隆朋可以通过促进海马、丘脑和大脑皮层内神经突触释放5-HT和5-HIAA而产生麻醉作用。 相似文献
5.
为探讨去甲肾上腺素和5-羟色胺在小型猪特异性麻醉颉颃剂催醒过程中的作用,40只Wistar大鼠随机均分为单纯麻醉组和麻醉-催醒组。这两组又随机均分为恢复翻正反射即刻和恢复直线爬行即刻2个小组。采用高效液相色谱法检测麻醉大鼠不同脑区去甲肾上腺素和5-羟色胺含量变化。结果显示,注射颉颃剂后,麻醉大鼠各脑区内去甲肾上腺素呈现升高趋势,5-羟色胺呈现降低的趋势,与大鼠苏醒过程行为学变化基本吻合。研究表明小型猪特异性麻醉颉颃剂催醒作用可能与大脑皮层、丘脑内去甲肾上腺素和5-羟色胺的变化有关,这可能是XFM麻醉与催醒的靶位之一。 相似文献
6.
研究咪达唑仑对山羊不同脑区cAMP含量的影响,探讨其在中枢麻醉中的作用机制。试验用15只健康山羊,3只为生理盐水对照组,其余为试验组,试验组山羊肌肉注射14mg/kg体重咪达唑仑。分别在给药后诱导期、麻醉期、恢复1期和恢复2期4个时间点,每个给药点剖杀3只山羊取脑组织,并采用ELISA测定不同脑区cAMP含量。注射咪达唑仑后,山羊大脑皮层、海马、丘脑、小脑和脑干内cAMP含量显著升高,恢复2期上述脑区内cAMP含量均恢复到正常水平,这种变化趋势与山羊肌肉注射咪达唑仑麻醉后行为学变化基本一致。表明咪达唑仑的麻醉作用可能与激活山羊各个脑区内cAMP信号转导系统相关。 相似文献
7.
研究盐酸塞拉嗪麻醉下大鼠不同脑区兴奋性氨基酸类神经递质含量的变化,探讨盐酸塞拉嗪中枢麻醉作用的可能机理.将48只Wistar大鼠随机分成6组,分别为对照组、诱导组、麻醉组、恢复Ⅰ组、恢复Ⅱ组和恢复Ⅲ组.采用反向高效液相色谱法测定各脑区Glu和Asp的含量.结果表明:腹腔注射盐酸塞拉嗪40 mg·kg-1后,麻醉组大鼠海马和丘脑Glu、Asp的含量显著降低(P＜0.05或P＜0.01),而小脑和大脑皮质Glu、Asp的含量显著增加(P＜0.01);恢复Ⅰ组除脑干外其它各脑区Glu和Asp的含量与对照组比较差异显著(P＜0.05);恢复Ⅱ组各脑区Glu和Asp的含量均恢复显著(P＞0.05);麻醉全程,脑干内Glu和Asp含量均无显著变化(P＞0.05).结果提示,盐酸塞拉嗪对海马、丘脑、小脑和大脑皮质内Glu、Asp含量的影响可能是其产生全麻作用的重要机理之一.盐酸塞拉嗪的中枢麻醉作用,可能与降低海马和丘脑内Glu、Asp,增加小脑和大脑皮质内Glu、Asp的含量有关,海马可能是盐酸塞拉嗪作用的最敏感的脑区. 相似文献
8.
为探讨环鸟苷酸(cGMP)在噻环乙胺全麻分子学机理中可能的作用,48只SD大鼠,随机均分为对照组、麻醉组、恢复Ⅰ组和恢复Ⅱ组,用放射免疫法分别测定各脑区的cGMP含量.结果显示,大鼠腹腔注射噻环乙胺30mg/kg后,麻醉组大脑皮层、海马、丘脑的cGMP含量明显降低,分别较对照组降低了35.30%(P<0.01),26.48%(P<0.01),40.67%(P<0.01),而在恢复Ⅰ组和恢复Ⅱ组cGMP含量明显恢复(与对照组相比,P>0.05).在噻环乙胺麻醉全过程中脑干、小脑的cGMP含量未发生明显的变化.这表明,cGMP参与了噻环乙胺全麻作用产生的分子学机理的调控,噻环乙胺全麻作用可能与抑制大脑皮层、海马和丘脑等脑区cGMP释放有关. 相似文献
9.
2,6-二甲苯胺噻嗪(Rompun.Xylazine),商品名称为隆朋,属于化学保定药(也称制动药),是1962年德国拜耳公司合成的一系列苯胺噻嗪取代物中的一种,起初用于医学临床作为降压药,后发现其为肾上腺素α2受体激动剂[1],具有确切的中枢性镇静、微弱的镇痛和肌松作用,被推广到兽医临床作为麻醉药应用,广泛用于马、牛、羊、犬、猫、兔等多种动物的麻醉. 相似文献
10.
为探讨乳化异氟醚对大鼠不同脑区中枢神经NO-NOS-cGMP信号通路的影响,将36只Wistar大鼠分为对照组、麻醉组和麻醉恢复组,大鼠经尾静脉注射乳化异氟醚麻醉,采用比色和ELISA法检测各组不同脑区中枢神经一氧化氮(NO)产量、一氧化氮合酶(NOS)活性和环鸟苷酸(cGMP)含量。结果显示,大鼠在注射乳化异氟醚前后大脑皮质和海马中NO产量、NOS酶活性和cGMP含量变化与麻醉深度呈相关性,表明大脑皮质和海马中NO/cGMP信号转导系统参与了麻醉调控过程,大脑皮质和海马可能是乳化异氟醚产生麻醉效应的作用靶位。 相似文献
11.
In late December 1983, 2 800 veterinarians across Canada were sent a questionnaire in order to assess the status of heartworm disease in Canada in 1983 and 26% of them responded. Veterinarians reported that 59 504 dogs were blood-tested to check for microfilariae and 771 dogs (1.30% of those tested) were found with Dirofilaria immitis. Heartworm disease was diagnosed in all provinces except New Brunswick and Newfoundland but most (733) of the cases were in Ontario. Heartworm disease was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 31% of the cases were observed with clinical signs of heartworm disease and 64% had a history of not having left Canada. Southwestern Ontario continues to be the focus of the infection and most of the dogs there had not left the province previously. 相似文献
13.
In late December 1985, 1485 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1985 and 44% of them responded. Veterinarians reported that 137,300 dogs were blood-tested to check for microfilariae and 1210 dogs were found with heartworm. Another 36 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number diagnosed in 1985 as 1247 (0.91%). Heartworm was reported from all provinces except Prince Edward Island, Newfoundland and Saskatchewan but most (1126) of the cases were in Ontario. Southwestern Ontario continued to be the primary focus of the infection in Canada. From Quebec, 91 cases were reported mostly from and around Montreal. From Manitoba, 19 cases were reported from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 28% of the cases were observed with clinical signs of heartworm disease and 78% had a history of not having left Canada. 相似文献
14.
In late November 1988, 1581 small and mixed animal clinics and institutional veterinarians across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1988, and 46% of them responded. Veterinarians reported that 181,577 dogs were blood-tested for heartworm disease and 367 dogs were found with D. immitis microfilariae. Another 60 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1988 as 441 (0.24%). 相似文献
15.
In late December 1984, 1853 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1984 and 35% of them responded. Veterinarians reported that 97,794 dogs were blood-tested to check for microfilariae and 1417 dogs (1.45% of those tested) were found with heartworm. Another 34 dogs were amicrofilaremic, but were diagnosed as having heartworm disease, to give the total number diagnosed in 1984 as 1451 (1.48%). Heartworm was reported from all provinces except Prince Edward Island and Newfoundland but most (1310) of the cases were in Ontario. In Quebec, 126 cases were reported mostly from west of Montreal. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 27% of the cases were observed with clinical signs of heartworm disease and 72% had a history of not having left Canada. Southwestern Ontario continued to be the primary focus of the infection. 相似文献
17.
In late November 1991, 1883 clinics in Canada were sent a questionnaire to assess the status of Dirofilaria immitis in dogs in 1991 and there was a 60.0% response. There were 344,031 dogs tested for heart-worm (HW), 627 were found infected and the prevalence of HW infection was 0.18%. There were 417 dogs with HW in Ontario, 116 in Manitoba, 38 in Quebec, 53 in British Columbia, three in Alberta, and one in Nova Scotia. In British Columbia, all of the infected dogs but one were from the Okanagan valley which, as from 1991, is a new focus of infection in Canada. Most dogs with HW had not been on preventive medication in 1990, and the prevalence among dogs tested and unprotected was 0.59%. That prevalence was considerably higher in endemic areas. Companion dogs, over three years of age and maintained primarily outdoors in rural areas, were most frequently infected. One cat was diagnosed with D. immitis and 33 dogs had Dipetalonema reconditium. 相似文献
18.
In late November 1989, 1732 clinics and institutional veterinarians were sent a questionnaire to assess the status of Dirofilaria immitis, and 51.7% responded. Of 247,716 dogs tested, 394 had D. immitis microfilariae and 51 were amicrofilaremic for a total of 445 cases and heartworm prevalence of 0.17%. Most (408) of these dogs had no preventive medication and the prevalence among dogs tested and unprotected was 1.01%. That prevalence was considerably higher in endemic areas. Thirty-seven dogs with heartworm had preventive medication. Heartworm was most frequent in companion dogs over three years of age maintained outdoors in rural areas. About 75% of the cases had never left Canada, 26% had clinical signs and 125 were not treated. Heartworm was reported from British Columbia, Manitoba, Ontario, Quebec, Nova Scotia and Newfoundland, but 383 cases were in Ontario. South-western Ontario was the primary focus of infection. There were 33 cases in Quebec and 24 in Manitoba, mainly found in and around Metropolitan Montreal and Winnipeg respectively. 相似文献
19.
In late November 1987, 1246 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1987, and 50% of them responded. Veterinarians reported that 165,428 dogs were blood tested for heartworm disease and 511 dogs were found with D. immitis microfilariae. Another 78 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1987 as 589 (0.35%). 相似文献
20.
In late December 1986, 1224 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1986; 46% of them responded. Veterinarians reported that 150,989 dogs were blood-tested for microfilariae and 869 dogs were found with heartworm. Another 65 dogs were amicrofilaremic but diagnosed with heartworm disease and one was found with heartworm at necropsy to give the total number diagnosed in 1986 as 935 (0.62%). Heartworm was reported from Manitoba, New Brunswick, Ontario and Quebec, but most (810) of the cases were from Ontario. South-western Ontario continued to be the primary focus of the infection in Canada. There were 103 cases reported from Quebec, mostly from and around Montreal, and 21 cases from Manitoba, from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 33% of the cases were observed with clinical signs of heartworm disease and 81% had a history of not having left Canada. 相似文献
|
