Coil embolization of patent ductus arteriosus via the carotid artery in seven dogs     

Sarah J. Miller  William P. Thomas 《Journal of Veterinary Cardiology》2009,11(2):129-136

This study was designed to evaluate the feasibility and limitations of transcatheter embolization coil occlusion of patent ductus arteriosus in dogs using a carotid artery approach. Seven dogs examined at the University of California, Davis Veterinary Medical Teaching Hospital in 2002-2003 for evaluation of heart disease had congenital patent ductus arteriosus diagnosed by characteristic physical, electrocardiographic, radiographic, and anatomic and Doppler echocardiographic findings. Dogs were anesthetized for transesophageal echocardiography and transcatheter coil embolization of the ductus via the right external carotid artery. Coil embolization was achieved in all seven cases, using one to four detachable embolization coils. There were no major complications. Minor complications occurred in two dogs (additional coils placed using a femoral arterial approach and coil embolization of a left femoral artery branch). One dog was examined only 24 h post-operatively and had no murmur and trivial residual ductal flow by Doppler echocardiography. The other 6 dogs were clinically healthy when examined up to three years post-intervention. One dog had a very soft continuous murmur and mild residual ductal flow; the other five had no audible continuous murmur, with only one dog having trivial residual ductal flow identified by Doppler echocardiography. Although technically challenging, coil embolization via the carotid artery is a viable alternative approach for transcatheter closure of patent ductus arteriosus in some dogs.  相似文献   

针刺颈椎病穴治疗椎动脉型颈椎病的临床观察     

蒋学余  付漫娣   《勤云标准版测试》2012,32(9):70-73

目的观察针刺颈椎病穴治疗椎动脉型颈椎病的临床疗效。方法将 102例椎动脉型颈椎病患者随机分成治疗组和对照组各51例。治疗组针刺以颈 椎病穴为主穴,对照组针刺以颈夹脊穴为主穴;两组针刺得气后,均辨证取穴, 接电针仪,中等刺激强度,每日1次,10次为1个疗程。均治疗2个疗程后,采用头 晕症状评分量表和经颅多普勒(TCD)检查比较2组患者治疗前后临床症状改善 情况及椎-基底动脉血流速度改善情况。结果治疗组患者临床愈显率为85%,显 著高于对照组50%(P<0.05);眩晕证候积分减少率,血流速度改变率,两组治疗 后比较差异有统计学意义(P<0.05)。结论针刺颈椎病穴在改善患者临床症状, 改善血流速度,提高临床愈显率方面较颈夹脊穴组有明显的优势。  相似文献   

螺旋CT对大脑中动脉供血区超急性期脑梗死的诊断价值     

唐璐 《吉林林学院学报》2009,(6):516-517

目的探讨螺旋CT对大脑中动脉供血区超急性期脑梗死的诊断价值.方法对62例大脑中动脉供血区超急性期脑梗死（发病6 h内）的CT征象进行分析.结果大脑中动脉供血区脑梗死超急性期CT表现为MCA高密度征、点状征及豆状核边缘模糊,密度减低;岛叶密度减低,相应侧裂池变窄;颞叶灰质密度减低,脑沟变窄或消失,灰白质界限不清.结论螺旋CT对大脑中动脉供血区超急性期脑梗死有很高的诊断价值.  相似文献   

Destructive lesions of the proximal sesamoid bones as a complication of dorsal metatarsal artery catheterization in three horses     

Barr ED  Clegg PD  Mark Senior J  Singer ER 《Veterinary surgery : VS》2005,34(2):159-166

OBJECTIVE: To describe focal destructive lesions of the proximal sesamoid bones (PSBs) as a complication of dorsal metatarsal artery catheterization performed for direct blood pressure monitoring during equine general anesthesia. STUDY DESIGN: Retrospective study. ANIMALS: Three client-owned horses. METHODS: A dorsal metatarsal artery was catheterized in each of 3 horses for direct blood pressure monitoring during anesthesia. Radiography, ultrasonography, synoviocentesis, and arthroscopy were used to diagnose postoperative lameness that occurred in the limb used for blood pressure monitoring. RESULTS: Horses developed severe lameness, localized to the fetlock region of the catheterized limb within 21 days of surgery. Antibiotic therapy was administered. Surgical debridement was possible in 1 horse. Two horses that had lesions that were inaccessible, failed to respond to medical management and were euthanatized. The 3rd horse that had surgical debridement of affected bone, survived. Changes in hospital protocol, by improving aseptic technique during catheter insertion and use of new manometer tubing and heparinized saline for each arterial catheter inserted in the dorsal metatarsal artery, have eliminated this complication. CONCLUSIONS: Diagnosis and treatment of destructive lesions of the PSB were difficult. Strict aseptic technique should be followed during insertion of arterial catheters. CLINICAL RELEVANCE: Focal destructive lesions of the PSB subsequent to dorsal metatarsal arterial catheterization is a rare but serious complication of equine anesthesia.  相似文献   

Spectral waveform analysis of major arteries in conscious dogs by Doppler ultrasonography     

Kichang Lee  DVM  MS    Mincheol Choi  DVM  PhD    Junghee Yoon  DVM  PhD    Juhyun Jung  DVM  MS 《Veterinary radiology & ultrasound》2004,45(2):166-171

Normal values of arterial blood flow velocity and waveforms in major arteries of 10 healthy conscious Beagle dogs were determined using Doppler ultrasonography. Peak systolic, early diastolic, and end-diastolic velocities of the basilar artery, common carotid artery, abdominal aorta, external iliac artery, femoral artery, and peak ejection velocity of the valvular aorta were evaluated. Pulsatility index (PI) of the basilar artery and blood pressure were recorded. All arteries had a high-resistance flow pattern with triphasic flow velocity except the basilar artery, which had a low-resistance pattern. Mean peak systolic velocities of the basilar artery, common carotid artery, abdominal aorta, external iliac artery, and femoral artery were 72 +/- 19, 115 +/- 17, 121 +/- 24, 105 +/- 25, and 110 +/- 17 cm/s, respectively. The PI of the basilar artery and peak ejection velocity of the valvular aorta were 1.37 +/- 0.13 and 96 +/- 16 cm/s, respectively. Mean systolic and diastolic blood pressures were 137 +/- 13 and 78 +/- 15 mmHg, respectively. Present findings may be used as references in future studies on vascular diseases and hemodynamics in dogs.  相似文献   

INFLUENCE OF NORMOVOLEMIC ANEMIA ON DOPPLER-DERIVED BLOOD VELOCITY RATIOS OF ABDOMINAL SPLANCHNIC VESSELS IN CLINICALLY NORMAL DOGS     

Lee M. Koma  Robert M. Kirberger  Leonie Scholtz  Paul Bland-van den Berg 《Veterinary radiology & ultrasound》2005,46(5):427-433

Doppler spectra of the abdominal aorta (AAo), cranial mesenteric artery (CMA), celiac artery (CA), and left renal artery (LRA) were obtained from 11 fasted, clinically healthy, conscious Beagles before and after inducing severe acute normovolemic anemia (mean±standard deviation hematocrit 16.0±0.77%). Peak systolic, end diastolic, and time-averaged mean velocities were measured. The different vessels were compared with each other. Peak systolic velocity ratio and time-averaged mean velocity ratio of splanchnic vessels to corresponding variables of the AAo were computed and compared between and within vessels during physiologic and anemic states. There was no difference between LRA and AAo, CMA or CA regarding time-averaged mean velocity, time-averaged mean velocity ratio, or end diastolic velocity during the physiological state. During the anemic state, LRA mean time-averaged mean velocity ( P ≤0.008) and mean end diastolic velocity ( P ≤0.041) were significantly lower than those of AAo, CMA, and CA. Mean time-averaged mean velocity ratio of the LRA was also significantly ( P ≤0.004) lower than the CMA and CA ratios, and significantly ( P =0.014) lower during anemic state than physiologic state of the same vessel. End diastolic and time-averaged mean velocities of the AAo, CMA, and CA increased proportionally during anemia, but there was a relatively less increase in the same variables of the LRA, suggesting less increase in blood flow. Doppler ratios allowed a noninvasive comparison between splanchnic and aortic hemodynamics. Velocity ratios might be useful for clinical detection of relative hemodynamic changes between different vessels.  相似文献   

ULTRASONOGRAPHIC EVALUATION OF PRE- AND POSTNATAL DEVELOPMENT OF THE EYES IN BEAGLES     

Susanne A. E. B. Boroffka  DVM  Dr. Med. Vet. 《Veterinary radiology & ultrasound》2005,46(1):72-79

Transabdominal ultrasonography was performed to visualize the development of intraocular structures of both eyes of four different fetuses in each of two pregnant beagles. Postnatally the development of both eyes of 11 pups was visualized with ultrasonography. Furthermore, biometric measurements of the length of the eye, the depth of cornea, the anterior chamber, the lens (anteroposterior depth and equatorial diameter), and the vitreous body of the fetuses and pups were obtained when these structures could be identified with ultrasonography. In all fetuses the eyes with lens, vitreous body, hyaloid artery, and scleroretinal rim could be clearly identified from day 37 of pregnancy. Postnatally also the cornea, anterior chamber, iris, ciliary body, and optic disc were visible. Biometric measurements revealed, both pre- and postnatally, a continuous growth of the depth of the eye, anterior chamber, lens (anteroposterior depth and equatorial diameter), and vitreous body.  相似文献   

ASSESSMENT OF LOCATION OF THE CELIAC AND CRANIAL MESENTERIC ARTERIES RELATIVE TO THE THORACOLUMBAR SPINE USING MAGNETIC RESONANCE IMAGING     

Ruth Dennis 《Veterinary radiology & ultrasound》2005,46(5):388-390

Exact localization of thoracolumbar lesions can be harder with magnetic resonance (MR) imaging than with radiography. The celiac and cranial mesenteric arteries are easily seen on MR images and are always included in sagittal thoracolumbar studies. This study was undertaken to establish whether their location was sufficiently consistent to enable them to be used as anatomic landmarks. It was found that their location varied considerably, and there was no useful relationship to breed, gender, age, or body weight. They are therefore unreliable for use in establishing initial localization of a spinal lesion although they can be helpful when comparing multiple image planes.  相似文献   

THREE-DIMENSIONAL HELICAL COMPUTED TOMOGRAPHIC ANGIOGRAPHY OF THE LIVER IN FIVE DOGS     

MATTHEW D. WINTER  LINDA M. KINNEY  LAWRENCE J. KLEINE 《Veterinary radiology & ultrasound》2005,46(6):494-499

The objective of this study was to develop a simple, safe, minimally invasive protocol to evaluate the hepatic vasculature. Five purpose-bred Beagle dogs underwent noncontrast-enhanced computed tomographic scan of the entire abdomen. A dynamic, nonincremental computed tomography scan at the level of T11 was then performed using a test bolus of contrast medium to determine time to peak opacification and to aid in the calculation of scan delay. The time to peak arterial enhancement ranged from 2.0 to 7.0 s, with a median of 2.0 s. The time to peak portal venous enhancement ranged from 23.0 to 46.0 s, with a median of 32.0 s. Scan delay for arterial opacification ranged from 0 to 5.0 s, with a median of 0 s. Scan delay for the portal phase of opacification ranged from 6.0 to 21.0 s, with a median of 17.0 s. Using this information, two separate computed tomographic studies were used to image the arterial and portal venous phases of circulatory opacification, respectively. The dogs were hyperventilated to prevent breathing motion during the scan, each of which required approximately 20 s. A power injector was used to inject diatrizoate meglumine (128 mg I/kg) through an 18-gauge cephalic vein catheter at a rate of 5 ml/s. Scanning was initiated after the appropriate scan delay to optimize the specific phase of vascular filling. Maximum intensity projections allowed clear delineation of the hepatic arteries and the portal venous system, while eliminating overlying structures that might interfere with image analysis. Time/density curves were generated, and the time needed for each study was recorded. Hepatic arteries and portal veins were clearly visualized in all dogs. Parenchymal opacification was also observed.  相似文献   

Vasomotor effects of histamine on bovine and equine basilar arteriesin vitro     

A. Miyamoto  A. Nishio 《Veterinary research communications》1994,18(6):447-456

The vasomotor effects of histamine on isolated bovine and equine basilar arteries were examined. Histamine induced contractions in both these preparations. The maximal response to and pEC₅₀ value for histamine of the equine artery were larger than those of bovine tissue. Similar results were obtained with endothelium-denuded basilar arteries. Diphenhydramine (H₁-receptor antagonist) inhibited histamine-induced contractions of the basilar arteries from both species in a concentration-dependent manner and its pA ₂ values (with 95% confidence limits) were 7.61 (7.39–7.83) and 8.15 (8.01–8.29) for the bovine and equine preparations, respectively. Cimetidine (H₂-receptor antagonist) slightly potentiated histamine-induced contractions of bovine, but not equine, basilar arteries. 2-Thiazolylethylamine (H₁-receptor agonist) induced contractions in both preparations, whereas impromidine (H₂-receptor agonist) induced weak relaxation of the bovine, but not the equine, tissue. These findings indicate that bovine basilar arterial smooth muscle cells possess H₁- and H₂-receptors. Stimulation of the former results in contraction, whereas stimulation of the latter results in weak relaxation. Equine basilar arterial smooth muscle cells possess H₁-receptors, stimulation of which results in contraction.Abbreviations CR concentration ratio - EC₅₀ concentration producing 50% maximal response - pA ₂ negative logarithm of the molar concentration of antagonist that produces a twofold rightward shift of a concentration-response curve - pEC₅₀ negative logarithm of EC₅₀ - PGF₂ prostaglandin F₂ - PGI₂ prostaglandin I₂  相似文献