Precise needle placement is required for the success of a wide variety of percutaneous interventions in medicine. Insertions into soft tissues can be difficult to learn and to perform, due to tissue deformation, needle deflection and limited visual feedback. Little quantitative information is known about the interaction between needles and soft tissues during puncture, and no effective physical...

Materials and methods: Pigs raised under antibiotic-free (ABF) conditions (n = 3424) were vaccinated first with combined Mycoflex and Circoflex (Boehringer Ingelheim Vetmedica Inc, St Joseph, Missouri) and second with ER Bac Plus (Pfizer Inc, Pfizer Animal Health, New York, New York), each via either conventional syringe and needle (Needle) or NFID. The first vaccination was given on the right ...

A sheathed needle (Tru-Cut) was compared with a suction biopsy needle (Menghini) in a randomised prospective trial over 18 months to determine whether the former offered any special advantages in routine percutaneous liver biopsy. Seventy-seven consecutive biopsies were performed by a single operator. Although biopsy fragmentation was commoner with the suction needle, the length and volume of t...

and Implications Various needle gauges, lengths, and hub material was tested under static loading conditions. Significant differences exist in the needle industry in terms of strength and failure rate. Needle breakage was found to occur only when a bent needle was straightened and then reused. Manufacturing differences were found especially in the bond that joins the needle/hub assembly resulti...

sewing is one of the most commonly used manufacturing processes in the world. in the textile industry, development of sewing machines with optimal mechanical performance is very important. obviously, the quality of sewing, the increase of the needle transmission force and the optimal mechanical advantage are greatly dependent on the design criteria of the needle driving mechanism. unfortunately...

introduction: the purpose of the present study was to record their pain sensation and to assess children`s reaction objectively and subjectively while receiving dental local anesthesia with 27- and 30-gauge needles. methods: forty children (24 boys and 16 girls) participated in this study. a random double-blinded crossover design was used so that each child served as his or her own control, rec...

Dear Editors, I read with interest the study by Phelan et al. [1]. The authors should be commended for their study evaluating the use of echo-enhanced needles in obtaining ultrasoundguided vascular access using a short-axis view. Historically, ultrasound has been used to guide needle, catheter and guidewire placement by radiologists but it now is being used increasingly by anaesthesiologists, e...

BACKGROUND Vascular access is a critical skill for emergency physicians. However, it can be unpredictably challenging in some patients. While ultrasound-guided vascular access has been encouraged in emergency departments, there have been few studies evaluating echo-enhanced needles and their usefulness in performing vascular access. AIMS Our purpose was to determine if the use of an echo-enha...

Needle insertion is performed in many clinical and therapeutic procedures. Tissue displacement and needle bending which result from needle-tissue interaction make accurate targeting difficult. For performing physicians to gain essential needle targeting skills, needle insertion simulators can be used for training. An accurate needle bending model is essential for such simulators. These bending ...