BACKGROUND Core needle biopsy is a relatively new technique used to diagnose salivary gland lesions, and its role in comparison with fine needle aspiration cytology needs to be refined. METHODS We compared the results of 228 ultrasound-guided core needle biopsy and 371 fine needle aspiration procedures performed on major salivary gland tumors with their postoperative histological diagnoses. ...

The effectiveness of fine-needle aspiration (FNA) increases with the number of needle passes, but needle passes are also associated with increased risk of adverse events. The trade-off between needle passes and adequacy has not been well characterized. Clinical studies are limited because of their inherent variability and limited sample size. We developed mathematical models to compare the perf...

Approaches There are many approaches to regional blocks with ultrasound guidance. Here are some common techniques and some comments on their utility. Offline Markings. This means making skin markings based on ultrasound scans (but not imaging while the needle is placed). This method is limited by changes in patient position, skin mobility, elastic properties of soft tissue, distortion by local ...

background: the purpose of this study was to evaluate the effect of needle type on pain and bleeding during oocyte pick-up (opu). methods: from may through november 2013, patients undergoing opu from a single follicle without any analgesic treatment were including this study. eligible patients (n=75) were randomized 1:1 to undergo the procedure with either a reduced needle (17 gauge body, 20 ga...

BACKGROUND To reduce injection pain and improve satisfaction, a thinner (29-gauge [29G]), sharper (5-bevel) needle than the 27G/3-bevel needle used previously to inject interferon (IFN) beta-1a, 44 or 22 mcg subcutaneously (sc) three times weekly (tiw), was developed for use in multiple sclerosis (MS). METHODS Two clinical trials in healthy volunteers and five surveys of patients with MS were...

PURPOSE To introduce and determine the biopsy length performance of the novel enhanced cutting edge (ECE) needle tip design, which contains high inclination angles that allow for more efficient tissue cutting. METHODS ECE and regular two-plane symmetric needle tip's biopsy performance and cutting force are compared over a series of needle insertion experiments into bovine liver under varying ...