BACKGROUND The effects of epidural needle design, angle, and bevel orientation on cerebrospinal fluid leak after puncture have not been reported. The impact of these factors on leak rate was examined using a dural sac model. Dural trauma was examined using scanning electron microscopy. METHODS Human cadaveric dura, mounted on a cylindrical model, was punctured with epidural needles using a mi...

conclusions there is clinical utility in knowing the relative deflection of various needle tips. when a procedure requires a needle to be steered around obstacles, or along non-collinear targets, the predictable and large amount of deflection obtained through use of a beveled spinal needle may prove beneficial. materials and methods six needles commonly used in spinal procedures (quincke, short...

OBJECTIVES To determine the effects of intraocular pressure (IOP) and needle diameter on the amount of reflux after intravitreous bevacizumab injection. METHODS Prospective randomized interventional study. Twelve New Zealand white rabbits weighing approximately 2.5 to 3.5 kg each were randomized 1:1 to group 1 or group 2. Bevacizumab stained with trypan blue was used for intravitreous injecti...

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...

PURPOSE To evaluate subretinal detection of bevacizumab 2 hours after intravitreous injection of 1.25 mg in rabbit eyes. METHODS Anterior chamber paracentesis using a 30-gauge needle was performed in nine female Dutch-belted rabbits by removal of 0.05 mL of aqueous humor. Transscleral retinal detachment was performed with a modified 25-gauge infusion cannula connected to a bottle of physiolog...

PURPOSE We describe pain scores for a modified anesthesia technique for no-scalpel vasectomy using a 1-inch 30 gauge mini-needle. MATERIALS AND METHODS A prospective study was performed in 277 patients who received anesthesia using a 3 cc syringe filled with approximately 2 cc 2% lidocaine without epinephrine and a 1-inch 30 gauge needle. Local anesthesia was given directly to the vas at the ...

PURPOSE To compare pain scores of patients during intravitreal 27-gauge bevacizumab and 30-gauge ranibizumab injection procedures. METHODS Seventy eyes of 70 patients who had not previously undergone intravitreal anti-vascular endothelial growth factor therapy were included in this study. Thirty-five patients received ranibizumab and 35 patients received bevacizumab. The diagnoses of the pati...

Fine needle aspiration biopsy of lymph nodes using a 19 gauge needle and Luer Lok syringe was performed in 59 cases. This was compared with histological diagnosis and an accuracy of 93.2% was achieved. This method is simple and is highly acceptable among patients. It is a very useful technique where a biopsy of lymph node is not possible (JPMA 30:267, 1980).