AIM Pain control, which is necessary during most dental procedures, is administered by injecting a local anaesthetic. Because the injection itself can be painful, the procedure via which pain is reduced warrants continued investigation. Only a few studies regarding the reaction of children to dental needle insertion without the use of topical anaesthetics have been reported. This study was cond...

conclusions lidocaine-meperidine-diltiazem gel provides significantly better pain control than lidocaine-diltiazem gel and lidocaine gel alone during transrectal ultrasound guided prostate biopsy and probe insertion. this mixture gel is safe, easy to administer and well accepted by patients. results the mean of visual analog pain scale was 4.5 in group a, 3.5 in group b, and 2.0 in group c duri...

Ultrasound-guided needle insertion is essential in many of minimally invasive surgeries or procedures, such as biopsy, drug delivery, spinal anaesthesia, etc. Accurate and safe needle insertion is a difficult task due to the high requirement of hand-eye coordination skills. Many proposed virtual reality (VR) based training systems put their emphasis on realistic simulation instead of pedagogica...

This work studies the control of a pneumatic actuator for needle insertion in soft tissue without using axial rotation or additional supports. Employing simplified rigid-link model description an axial-symmetric tip supported at base, two energy shaping controllers are proposed. The friction forces compensated adaptively and stability conditions closed-loop equilibrium discussed. compared by me...

In this paper, simulations for needle insertion were performed by using a novel Eulerian hydrocode FEM, which was adaptive for large deformation and tissue fracture. We also performed experiments for the same needle insertion with silicon rubbers and needles, which had conical tips of different angles in order to investigate the accuracy of the simulations. The resistance forces in the simulati...