PURPOSE In prostate brachytherapy, a grid is used to guide a needle tip toward a preplanned location within the tissue. During insertion, the needle deflects en route resulting in target misplacement. In this paper, 18-gauge needle insertion experiments into phantom were performed to test effects of three parameters, which include the clearance between the grid hole and needle, the thickness of...

BACKGROUND Placebo needles that can mask acupuncture practitioners to the type of needle used have been considered almost impossible to develop until now. METHODS We designed a double-blind non-penetrating placebo needle, the needle tip of which simply presses against the skin, and a matched penetrating needle. The needles are encased inside an opaque guide tube and the appearance and feel of...

A micro-advancer device that positions a narrow-gauge needle within the vitreous humor of the rat eye is described. The device is compact, simple and inexpensive to manufacture. It consists of an outer guard needle and an inner injection needle that is advanced through the guard needle. With the rat held in a stereotaxic holder and the globe fixed to a stabilizing ring, the outer 25-gauge guard...

BACKGROUND/AIMS Needle-track seeding is a rare but important complication of diagnostic and therapeutic ultrasound (US)-guided procedures in hepatocellular carcinoma (HCC). We examined the frequency of needle-track seeding after US-guided percutaneous ethanol injection (PEI), fine-needle aspiration biopsy (FNAB), and percutaneous transhepatic biliary drainage (PTBD) in order to determine the ap...

background: needle stick accidents  are a serious health  risk  for blood-borne infections among health-care workers(hcws). objective: to determine the frequency of needle stick injuries (nsis)  among hcws. material & methods: a cross-sectional study was conducted in  behesti hospital  of kashan from september 2012 to march 2013. data were collected using  a questionnaire. result: needle stick ...

background & aims of the study: the sharp injuries (sis) are a percutaneous piercing wound caused by a sharp instrument. needle sticks and sharp injuries (nssis) can increase the incidence of cases of hepatitis b, c and hiv. the purpose of this study was to investigation of the relative frequency of nssis in healthcare workers (hcws) in ahvaz, iran (razi hospital) over 3-year period (2011–2013)...

the aim of this study was to evaluate the role of fine needle aspiration cytology in the diagnosis of abdominal and retroperitoneal masses in children on this study. in 53 cases of childhood abdominal and retroperitoneal masses within a 4 year period (1998- 2001) preoperative fine needle aspiration was done under the guide of ct scan. 2 pathologists reviewed fine needle aspiration smears. in al...

background and objectives: thyroid gland because of its superficial location is amenable to direct physical examination. clinical assessment of thyroid lesions by means of physical examination, thyroid scans and ultrasonography is not completely reliable. fine needle aspiration cytology (fnac) is the most cost-effective, safe and an initial diagnostic test in the pre-operative evaluation of thy...