Role of Magnetic Resonance Perfusion Imaging in Acute Stroke: Arterial Spin Labeling Versus Dynamic Susceptibility Contrast-Enhanced Perfusion.

Introduction: The role of perfusion neuroimaging in managing cases of acute ischemic stroke (AIS) is to identify ischemic penumbra and regions of hypo-perfusion, which can be salvaged. Dynamic susceptibility contrast (DSC) perfusion imaging techniques have been the main magnetic resonance imaging (MRI) perfusion techniques used to identify AIS. Arterial spin labelling (ASL) is an alternative non-invasive perfusion technique, which permits tissue perfusion measurement without any need for administration of exogenous contrast agents.

Endoscopic pyloric suturing to facilitate weight loss: a canine model.

Background: More than 66% of adults in United States are overweight or obese.

Objective: To decrease gastric emptying and cause early and prolonged satiety by endoscopically narrowing the gastric pylorus.

Design: Thirteen dogs were randomized into 3 groups (suture, sham, and control).

A retrospective review of enteroclysis in patients with obscure gastrointestinal bleeding and chronic abdominal pain of undetermined etiology.

Our purpose was to determine the diagnostic utility of enteroclysis in the evaluation of obscure gastrointestinal bleeding and abdominal pain of unknown etiology. This is a retrospective review of 97 consecutive patients (mean age, 54.1+/-17.

Comparison of a salivary/sputum pepsin assay with 24-hour esophageal pH monitoring for detection of gastric reflux into the proximal esophagus, oropharynx, and lung.

The purpose of this study was to determine whether measurement of salivary/sputum pepsin could be used as a surrogate marker for detecting gastroesophageal reflux using 24-hr esophageal pH monitoring as the gold standard. Patients with gastroesophageal reflux symptoms underwent simultaneous 24-hr esophageal pH monitoring and collection of saliva and sputum samples for pepsin measurement using a recently developed assay. In all, 16 patients provided 19 positive (10.

A new device for measuring esophageal variceal pressure.

Background: Esophageal varices are a frequent source of bleeding in patients with cirrhosis. Elevated intravariceal pressure is associated with variceal bleeding. There is no simple, easy-to-use device for noninvasive measurement of intravariceal pressure.