排序方式： 共有39条查询结果，搜索用时 15 毫秒
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XUE Ying-sheng WANG Jing-feng NIE Ru-qiong WU Wei-kang LUO Han-chuan CHEN Xiao-wei 《园艺学报》2004,20(4):603-607
AIM: To investigate the influence of Sini decoction (SND) on the proliferation and apoptosis of rabbit abdominal aorta smooth muscle cells after ballon injury and discuss the effect of vascular smooth muscle cell's (VSMCs) proliferation and apoptosis in post-percutaneous coronary intervention (PCI) restenosis (RS) and the feasibility of SND preventing post-PCI RS. METHODS: The animal model of rabbit abdominal aorta ballon injury was set up and the therapertic group was treated with SND. The shape of proliferative and apoptotic cell were investigated by electron microscope. Immunohistochemistry staining was performed using α-actin,PCNA and Cyclin E monoclonal antibodies. In situ Cell Death Detection Kit was used to identify apoptotic cells. Abdomial aorta angiography was operated in the 84th day subgroup and the stenosis degree was evalued by quantitative angiographic analysis. RESULTS: As compared with the control group, the therapeutic group displayed a lower proliferative percentage and a higher apoptosic percentage (P<0.05). Moreover, the apoptosic peek time was on the 14th day after operation,which was longer than the control group. CONCLUSION: SND effectly inhibited the proliferation of VSMCs and iuduced apoptosis in VSMCs. 相似文献
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A 10½-year-old, male neutered, pug presented with increasing ascites over two months. Echocardiography revealed cor triatriatum dexter with no concurrent cardiovascular anomalies, subsequently confirmed by computed tomography angiography. Balloon dilation of the perforated intra-atrial membrane under fluoroscopic guidance resulted in the transient resolution of all clinical abnormalities, but six months later stenosis and ascites recurred. After repeated balloon dilation, a stent was placed across the membrane. The dog remains asymptomatic fourteen months after the second procedure. One noteworthy feature of this case is the onset of congestive heart failure due to a congenital defect only at more than 10 years of age. 相似文献
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NIE Xiao-min LIU Rui-run HUANG Zhen-wen DONG Jian-zeng ZHANG Jin-ying LI Geng-shan 《园艺学报》2001,17(3):248-250
AIM:To investigate the effect of L-arginine (L-Arg) on intimal proliferation and expression of related cell cycle regulatory factors after vascular injury in rats. METHODS:Rats were divided into three groups :sham operation group, balloon injury group(this group included balloon 48 h,7 d and 14 d subgroup) and balloon+L-Arg group. Neointima area were calculated morphologiocally. The expression of cyclin dependent kinase-2(CDK2),cyclin E and proliferation cell nuclear antigen (PCNA) were measured by means of immunohistochemical technique and computer image analyzer. RESULTS:After vascular balloon injury, the level of plasma NO decreased, CDK2、cyclin E and PCNA expressed in the media at 48 h and in the neointima at 7 d and 14 d but with low and undetected expression in the media, the expression of CDK2, cyclin E and PCNA increased with the intima thickening. Compared with balloon 14 d group, the plasma NO level increased (P＜0.01), the neointima area reduced by 59.1%(P＜0.01) and the positive expression indexes of CDK2, cyclin E and PCNA decreased by 36.1%, 46.3% and 76.2% respectively in balloon+L-Arg group (P all＜0.01). CONCLUSION:L-Arg can effectively repress intima proliferation after vascular injury, which may be associated with its inhibiting the proliferation of vascular smooth muscle cell through downregulating the excessive expression of CDK2, cyclin E and PCNA. 相似文献
4.
Schrope DP 《Clinical Techniques in Small Animal Practice》2005,20(3):182-195
Balloon valvuloplasty has become the accepted method of therapy for the majority of dogs with valvular pulmonic stenosis. Success rate of balloon valvuloplasty is excellent but the procedure can have a steep learning curve. An understanding of the equipment used and specifics of the procedure is important to maximize success and minimize risk. This paper will review criteria for choosing candidates for balloon valvuloplasty, discuss the equipment used, discuss the procedure in detail, and finally discuss assessment of success and possible complications. 相似文献
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Oesophageal strictures in 2 horses with chronic recurrent oesophageal obstruction or choke was diagnosed by endoscopy and contrast radiography. Balloon dilation of the strictures was performed under endoscopic and fluoroscopic guidance. Follow‐up endoscopic and radiological examinations performed 6 weeks after the procedure showed clear dilation of the strictures. Both horses did not have any recurrence during follow‐up periods of 10 and 12 months. 相似文献
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Abstract Both efficiency and precision of field-grown plant biomass survey are expected to be improved when aerial images of whole fields are acquired. Many such studies have been conducted in paddy rice (Oryza sativa L.), wheat (Triticum aestivum), and beans (Glycine max (L.) Merr. and Phasaeolus vulgaris), but few in vegetables. In this study, we examined whether or not aerial image analysis is useful for the biomass survey of vegetables. Aerial images of field-grown crisphead lettuce (Lactuca sativa L.) in a three-year fertilizer trial were acquired at head formation and harvesting stages in summer and autumn cropping with a compact digital camera hung under a tethered small balloon (2.2 m in length, 0.56 m3 in volume). The camera height ranged from 36 to 65 m, and the ground resolution ranged from 1.3 to 2.2 cm pixel ?1. The horizontally projected area of the plant was measured as follows: Aerial images of the field were topographically corrected, the lettuce part was extracted based on the difference in color, the images were binarized, and the projected area was determined by image processing software. The estimation of fresh weight of one plant from the projected area was difficult because of the large data dispersion. When the averaged projected area in each plot was used, estimation was improved in some cases. Estimation of fresh weight at the harvesting stage by using the projected area at the head formation stage was difficult due to the low correlation coefficient. The results of factor analysis of fertilizer treatments by using projected area agreed well with those done using fresh weight when the correlation coefficient between the projected area and the fresh weight was high. It was concluded that the estimation of absolute lettuce fresh weight was difficult, but relative comparisons among treatments were possible until the head formation stage, using aerial images acquired by low-altitude small-balloon sensing. 相似文献
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《Veterinary anaesthesia and analgesia》2023,50(5):388-396
ObjectiveTo evaluate the effect of a prophylactic lidocaine constant rate infusion (CRI) on the incidence and malignancy of catheter-induced ventricular ectopic complexes (VECs) during balloon valvuloplasty for management of pulmonic stenosis in dogs.Study designSingle-centre, prospective, randomized study.AnimalsClient-owned dogs (n = 70) with pulmonic stenosis.MethodsDogs were randomly assigned to one of two anaesthetic protocols: administration of lidocaine 2 mg kg–1 bolus followed by a CRI (50 μg kg–1 minute–1; group LD) or a saline placebo (group SL) during balloon valvuloplasty. All dogs were premedicated with methadone (0.3 mg kg–1) intramuscularly and a digital three-lead Holter monitor was applied. Anaesthetic co-induction was performed with administration of alfaxalone (2 mg kg–1) and diazepam (0.4 mg kg–1), and anaesthesia was maintained with isoflurane vaporised in 100% oxygen. CRIs were started on positioning of the dog in theatre and discontinued as the last vascular catheter was removed from the heart. All dogs recovered well and were discharged 24 hours postoperatively. Blinded Holter analysis was performed by an external veterinary cardiologist using commercially available dedicated analysis software; p < 0.05.ResultsOf the 70 dogs enrolled in the study, 61 were included in the final analysis: 31 in group LD and 30 in group SL.There was no significant difference between sinus beats (p = 0.227) or VECs (p = 0.519) between groups. In group LD, 19/31 (61.3%) dogs had a maximum ventricular rate ≥250 units and 20/30 (66.7%) dogs in group SL (p = 0.791).Conclusion and clinical relevanceIn this study, the use of a prophylactic lidocaine bolus followed by CRI in dogs undergoing balloon valvuloplasty for management of pulmonic stenosis did not significantly decrease the incidence nor the malignancy of VECs during right heart catheterization compared with a saline CRI. 相似文献
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对陕西商洛地区桔梗根结线虫(MeloidogynehalpaChitwood)发病率及其生活环境和为害程度进行了调查,并采用化学药剂和植物粉剂对桔梗根结线虫进行了防治研究。结果表明,桔梗根结线虫在陕西商洛地区普遍发生,有虫株率为6.45%~44.6%,其主要生活在砂壤地中;化学药剂对桔梗根结线虫的防治效果优于植物粉剂。 相似文献
10.
Amara Estrada DVM N. Sydney Moïse DVM MS Shari Renaud-Farrell BS LVT 《Journal of Veterinary Cardiology》2005,7(1):41-51
Pulmonic valvuloplasty is a well-established method for the treatment of valvular pulmonic stenosis in people and dogs. In dogs, pulmonic valvuloplasty has been restricted to a single balloon; however, the simultaneous use of two balloons is common in pediatric cardiology. The use of two balloons provides an alternative to the use of a single large balloon in small dogs with a pulmonic anulus size that requires a large dilation catheter and large diameter introducer. Moreover, double balloon valvuloplasty permits dilation in large dogs with large pulmonic anulus sizes for which standard dilation catheters are not available. This report outlines the materials required, describes the technique, gives the advantages and disadvantages encountered when performing percutaneous double balloon valvuloplasty and provides some ‘tips’ for a successful outcome. 相似文献