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排序方式: 共有68条查询结果,搜索用时 46 毫秒
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不同肠段中氨基酸螯合锌吸收特点的研究 总被引:3,自引:0,他引:3
用 50日龄Wistar纯系雄性大鼠 ,以体内原位结扎肠段灌注技术结合放射性同位素示踪技术 ,通过与氯化锌比较 ,研究了十二指肠和空肠对氨基酸螯合锌 (以赖氨酸螯合锌和蛋氨酸螯合锌为代表 )的吸收特点。试验中观察了向结扎肠段灌注含不同形态锌的灌注液后 ,不同时间 (5 ,1 5 ,30 ,60 ,90 ,1 2 0min)血液中6 5Zn比放射性的动态变化 ,1 2 0min (试验结束 )时结扎肠段6 5Zn的消失率 ,不同组织器官中6 5Zn的比放射性的变化。试验结果表明 ,和空肠相比 ,十二指肠对 3种锌源的吸收率高 ;和氯化锌相比 ,十二指肠和空肠对 2种氨基酸螯合锌的吸收率高 相似文献
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OBJECTIVE: To describe clinical findings, surgical treatment, and outcome associated with trichophytobezoar duodenal obstruction in New World camelids. STUDY DESIGN: Retrospective study. ANIMALS: Alpacas (7) and 1 llama. METHODS: Historical and clinical data were obtained from the medical records of New World camelids with a diagnosis of trichophytobezoar duodenal obstruction confirmed by surgical exploration or necropsy. RESULTS: Seven camelids were <1 year old. Abnormal clinical findings included anorexia, reduced fecal output, recumbency, colic, abdominal distension, regurgitation, decreased serum chloride concentration, increased serum bicarbonate concentration, and/or elevated first gastric compartment chloride concentration. Survey abdominal radiographs obtained (4 animals) revealed gastric distension (4) and/or visualization of the obstruction (2). Diagnosis was confirmed at necropsy (1) or surgery (7). Right paracostal celiotomy was performed on all animals and duodenotomy (3) or retropulsion of the trichophytobezoar combined with third compartment gastrotomy (4) was used to remove the obstruction. Six animals survived to discharge and 5 were healthy at follow-up, 8-20 months later. The remaining discharged alpaca was healthy at 12 months but subsequently died of unrelated causes. CONCLUSIONS: Diagnosis of trichophytobezoar duodenal obstruction should be considered in juvenile New World camelids with abdominal distension and hypochloremic metabolic alkalosis. Right paracostal celiotomy can be used for access to the descending duodenum and third gastric compartment for surgical relief of obstruction. CLINICAL RELEVANCE: Duodenal obstruction from bezoars should be considered in New World camelids <1year of age with abdominal distension and hypochloremic metabolic alkalosis. Surgical relief of the obstruction by right paracostal celiotomy has a good prognosis. 相似文献
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An 8-year-old Haflinger mare with a 10-day-old foal at foot was referred with mild abdominal pain. On the basis of clinical examination, blood and peritoneal fluid analysis, the cause of pain was suspected septic peritonitis. The horse was initially managed medically, with the horse placed in box confinement under close monitoring. No permission was given for an exploratory laparotomy, and it was decided to perform a diagnostic laparoscopy in the standing horse. The laparoscopy revealed a 360-degree anticlockwise partial duodenal volvulus of the caudal descending duodenum, which was manually reduced (hand-assisted laparoscopy). After the release, the mesentery of the duodenum showed an ischaemic band (yellowish white and dark red with a hyperaemic side) and the duodenum had a distinct ischaemic ring (orally and aborally) distinguishing the incarcerated part from the normal duodenum. Ten minutes after the release, the colour remained the same. In conjunction with the owner, it was decided to euthanise the pony. Pathology confirmed the presence of a strangulation ring and the ischaemic condition of the involved duodenum. 相似文献
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Small intestine was taken from the caudal flexure of the duodenum and the terminal ileum proximal to the ileocaecal fold of 25 horses, 9 with acute grass sickness (AGS), 12 with subacute grass sickness (SAGS) and 12 with chronic grass sickness (CGS). The motility in the samples was measured isometrically either within 1 h of death or after storage for 24 h at 4°C.In control tissue, noradrenaline produced contractions of muscle strips which did not involve a muscarinic cholinergic mechanism and which were unaffected by the 1 antagonist prazosin but were blocked by the 2 antagonist yohimbine. Pretreatment with the antagonist phentolamine prevented the contractile response to noradrenaline and the background contractions either continued at a reduced rate and amplitude or were abolished after a few minutes. Thus, following blockade, noradrenaline reduced the background contraction rate by an effect on inhibitory adrenoceptors. The rate of background contractions in duodenal preparations was significantly greater than that in control ileal preparations.Although cold storage for 24 h caused a reduction in the background contraction rates of the control preparations, there was no effect on the contractile responses to noradrenaline, the associated pharmacology being similar to that of fresh tissue. This suggests that noradrenaline-evoked contraction was not dependent on enteric neural elements.The response to noradrenaline by grass sickness-affected tissue was generally similar to that of tissue from control horses, with an immediate contraction which was 2 sensitive. The contractile response to noradrenaline after propranolol was significantly reduced in the CGS group and there were significant differences between the AGS, CGS and control groups. There was a significant difference between the ileal preparations from the control and SAGS groups in their response to noradrenaline following pretreatment with propranolol. 相似文献
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十二指肠灌注DL-蛋氨酸对肉牛营养物质消化率和血液指标影响的研究 总被引:2,自引:0,他引:2
根据基础日粮+待测氨基酸法,由十二指肠瘘管连续灌注DL-Met,通过日增重、氮平衡试验、小肠营养物质消化率指标和血浆游离氨基酸含量确定基础日粮条件下十二指肠氨酸最佳灌注量。试验结果表明:III组日增重最高,比I组提高15.27%(P<0.05)II组和III组沉积氮、沉积氮/可消化氮显著高于I组(P<0.05),其中III组高于II组;III组尿中尿素氮显著低于I组(P<0.05)。III组小肠氮的表观消化率最高,比I组高5.72%(P<0.05)。III组血浆氨氮显著低于I组(P<0.05)。血浆Cys和MetIV组显著高于其它3组(P<0.05),而Ser和Ile则相反。III组血浆Leu、Lys、BCAA和EAA显著低于其它各组(P<0.05)。肉牛十二指肠蛋氨酸最佳灌注量为13g/d。 相似文献
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复合微生态制剂对肉仔鸡血清生化指标和十二指肠组织形态的影响 总被引:3,自引:1,他引:2
本试验旨在研究由鼠李糖乳杆菌和啤酒酵母共生培养物制备的复合微生态制剂对肉仔鸡血清生化指标和十二指肠组织形态的影响。试验选用1日龄健康艾维茵肉仔鸡240只,随机分为6个组,每组4个重复,每个重复10只鸡。对照组饲喂基础日粮,抗生素组饲喂含600 mg/kg金霉素的基础日粮,4个试验组饲喂基础日粮,并在饮水中分别添加0.1%、0.5%、1.0%、1.5%复合微生态制剂。试验结果表明,复合微生态制剂能有效提高肉仔鸡血清钙、磷、总蛋白、球蛋白和白蛋白的含量(P<0.05),能降低胆固醇的含量和白球比(P<0.05),并使十二指肠肠绒毛密度增加,长度显著增长(P<0.05)。复合微生态制剂对肉仔鸡血清中某些生化指标和十二指肠组织形态有一定的影响。 相似文献
10.
通过免疫组织化学法,应用CD3、CD4和CD8单克隆抗体研究了CD3+T淋巴细胞及CD4+和CD8+T淋巴细胞亚群在鸡盲肠扁桃体中的出现、迁移、组织定位分布及数量变化规律等一系列发育过程。结果显示:CD3+、CD8+T淋巴细胞最初于11胚龄时出现,而CD4+T淋巴细胞在15胚龄时出现。在定位分布变化上,CD3+主要分布在黏膜上皮中,CD4+主要分布在黏膜固有层中,CD8+在黏膜固有层和黏膜上皮内都有大量分布。在数量变化上,1~7日龄雏鸡各种阳性细胞的数量都骤然增加;而到7日龄时,雏鸡CD3+淋巴细胞的数量明显减少,CD4+、CD8+T细胞的数量无明显变化;从21日龄开始直到35日龄,雏鸡CD3+、CD4+和CD8+T淋巴细胞的数量持续增加。试验证明,鸡在出壳后初期十二指肠的细胞免疫功能增强。 相似文献