sjakov's vascular [32 articles]

Abstract

INTERPRETATION of thoracic radiographs is often challenging, even to the extent of differentiating normal from abnormal images. Overlooking significant lung pathology is clearly a problem but, conversely, over-reading of radiographs can lead to false positive diagnoses, with potentially serious consequences for the patient. Problems can arise from suboptimal image quality, variations in appearance due to technical or patient factors and non-specificity of radiographic changes. This article demystifies some of the principles surrounding interpretation of lung radiographs to help the reader gain ...

Note (first note only)

Gadofosveset Trisodium (Vasovist) is a safe and well tolerated intravascular contrast agent, currently approved in Europe and Canada. It has proved to be effective in the asessment of vascular diseases at all vascular territories. The possibility to image at steady state opens new horizons by increasing the spatial resolution and the robustness of diagnostic MRA. Initial studies proved the possibility to image beyond the vascular territory and to assess enhancing lesions as known from studies with standard contrast agents.

Abstract

OBJECTIVE: To compare hepatic, pancreatic, and gastric perfusion on dynamic computed tomography (CT) scans of clinically normal dogs with those of dogs with portal vascular anomalies. SAMPLE POPULATION: Dynamic computed tomography (CT) scans of 10 clinically normal dogs and 21 dogs with portal vascular anomalies. PROCEDURES: Retrospective analysis of dynamic CT scans. Hepatic arterial perfusion, hepatic portal perfusion, total hepatic perfusion, hepatic perfusion index, gastric perfusion, and pancreatic perfusion were calculated from time attenuation curves. RESULTS: Mean +/- hepatic arterial perfusion ...

Abstract

Objective To present details of an unusual case of caudal vena caval obstruction and its management in a cat. Study Design Clinical case report. Study Population A 15 month old male castrated domestic shorthaired cat. Results The diagnostic evaluation included the use of digital subtraction angiography and ultrasonography to locate the caudal vena caval obstruction. Treatment initially involved puncture and balloon dilation of the obstructed area of the cava. After reobstruction, the stenotic area was redilated and stented. The cat was ...

Note (first note only)

ObjectiveTo present details of an unusual case of caudal vena caval obstruction and its management in a cat.

Study DesignClinical case report.

Study PopulationA 15 month old male castrated domestic shorthaired cat.

ResultsThe diagnostic evaluation included the use of digital subtraction angiography and ultrasonography to locate the caudal vena caval obstruction. Treatment initially involved puncture and balloon dilation of the obstructed area of the cava. After reobstruction, the stenotic area was redilated and stented. The cat was euthanatized 4 weeks later because of vomiting,

Abstract

This study examined the ability of a collagen solution to aid revascularization of necrotic-infected root canals in immature dog teeth. Sixty immature teeth from 6 dogs were infected, disinfected, and randomized into experimental groups: 1: no further treatment; 2: blood in canal; 3: collagen solution in canal, 4: collagen solution + blood, and 5: negative controls (left for natural development). Uncorrected chi-square analysis of radiographic results showed no statistical differences (p >or= 0.05) between experimental groups regarding healing of radiolucencies but ...

Abstract

BACKGROUND: Stents are increasingly used in the endovascular treatment of intracranial aneurysms. We studied the effects of stenting and endothelial denudation on aneurysm and branch vessel occlusion. METHODS: Bilateral lingual bifurcation venous pouch aneurysms were created in eight dogs, surgically scraping the aneurysmal endothelial lining on one side. Both arteries were immediately stented using balloon-expandable stents. In four other dogs, a wide-neck carotid bifurcation aneurysm was created, with the vein pouch denuded or not (n=2 each), followed by immediate stenting. Results ...

Abstract

A 13-year-old, castrated male, domestic longhaired cat was diagnosed with primary hyperaldosteronism from an adrenal gland tumor and a thrombus in the caudal vena cava. Clinical signs included cervical ventriflexion, lethargy, weakness, inappetence, and diarrhea. Laboratory tests revealed hypokalemia, normonatremia, hyperglycemia, hypophosphatemia, and elevated creatine kinase activity. Hypokalemia worsened despite oral potassium supplementation. An adrenalectomy and caval thrombectomy were successfully performed utilizing deliberate hypothermia followed by progressive rewarming. ...

Abstract

Objective—To report outcome after surgical and interventional radiographic treatment of hepatic arteriovenous fistulae (HAVF) in dogs. Study Design—Retrospective study. Animals—Dogs (n=20) with HAVF. Methods—Medical records of dogs with HAVF were reviewed. Referring veterinarians and owners were contacted by telephone. History, clinical signs, biochemical and hematologic variables, ultrasonographic and angiographic findings, surgical findings, techniques used to correct the HAVF, survival time, and clinical follow-up were recorded. Results—Canine HAVF often appeared to be an arteriovenous malformation rather than a single fistula. Multiple extrahepatic portosystemic shunts were identified ...

Abstract

Computed tomographic images of the thoracic aorta of 14 German shepherd dogs were examined in order to determine the morphometry of the thoracic aorta. Examinations were carried out in the transverse plane at both intervertebral and mid-vertebral levels of each thoracic vertebra between T5 and T13. The dorsoventral and transversal diameters as well as cross-section area of the thoracic aorta were measured. The widest transversal diameter was observed at T4--5, whereas the largest dorsoventral diameter was detected at T5. The maximum ...

Abstract

A case of peripheral arterial tumor embolization in a cat is described. The cat presented with signs of aortic thromboembolism, including decreased peripheral pulse quality, pallor, and coolness of the distal limbs, as well as proprioceptive deficits. Thoracic radiographs revealed a cavitary lung mass; echocardiography was unremarkable. Cytologic evaluation of aspirates of the mass suggested malignancy. The left hindlimb was amputated, and histopathology confirmed embolization of an adenocarcinoma. Although rare, peripheral arterial tumor embolization should be considered as a differential in ...

Abstract

A five-year-old female domestic shorthair cat presented with clinical signs typical of an aortic saddle thromboembolism. An echocardiogram and thoracic radiographs excluded cardiac disease as a source of the thrombus. Two heavy metal opacity, pellet-like objects were seen in the thoracic and abdominal radiographs. Abdominal ultrasound demonstrated occlusion of aortic blood flow by the abdominal pellet but could not indicate whether this was due to a penetrating aortic wound or pellet embolisation. A necropsy confirmed a penetrating left ventricular cardiac wound ...

Abstract

OBJECTIVE: Evaluation of gastrointestinal blood flow is important. However, a non-invasive measurement method has not yet been established. The aim of this study was to compare measurement of normal gastric mucosal blood flow by advanced dynamic flow (ADF) flash echo imaging (FEI) with intravenous Levovist with measurement by laser Doppler flowmetry (LDF) to clarify the usefulness of ADF-FEI and thereby consider its feasibility as a non-invasive gastric mucosal blood flow measurement method. MATERIAL AND METHODS: Measurements were obtained in 25 beagle ...

Abstract

OBJECTIVE:: To investigate the effect of saline chase injected at 2 different rates on computed tomography (CT) angiography. MATERIALS AND METHODS:: This study was approved by our institutional animal study committee. Three injection protocols were used; contrast injection (24 mL, 0.8 mL/s) without saline chase (protocol A), contrast injection with saline chase injected at the same rate as the contrast medium (protocol B), and contrast injection with saline chase injected at half the rate (0.4 mL/s) of the contrast medium (protocol ...