Pneumothorax following ultrasound-guided jugular vein puncture for central venous access in interventional radiology: 4 years of experience.

Purpose: The purpose of our study was to review the rate of pneumothorax following central venous access, using real-time ultrasound guidance.

Materials And Methods: Data related to ultrasound-guided venous puncture, for central venous access, performed between July 1, 2004 and June 30, 2008 was retrospectively and prospectively collected. Access route, needle gauge, catheter type, and diagnosis of pneumothorax on the intraprocedure spot radiographs and or the postprocedure chest radiographs, were recorded.

Interexaminer difference in infarct volume measurements on MRI: a source of variance in stroke research.

Background And Purpose: The measurement of ischemic lesion volume on diffusion- (DWI) and perfusion-weighted MRI (PWI) is examiner dependent. We sought to quantify the variance imposed by measurement error in DWI and PWI lesion volume measurements in ischemic stroke.

Methods: Fifty-eight consecutive patients with DWI and PWI within 12 hours of symptom onset and follow-up MRI on >or= day-5 were studied.