Purpose: Recent advances in real time 3D ultrasound, EM tracking, needle position optimization, and rapid prototyping support a radically new prostate high dose rate (HDR) brachytherapy workflow that uses custom needle guides to insert needles. The purpose of this study is to evaluate one part of this workflow: the needle placement error associated with using a rapidly prototyped (3D printed) n...

INTRODUCTION Sacroiliac joint (SIJ) represents a difficult location for local therapies, as intra-articular injections may be hard to execute, especially in particular conditions such as chronic inflammatory diseases. However, in selected patients, local therapies may be considered. Some recent studies demonstrated the feasibility of ultrasound (US)-guided injection of SIJ, but still a complete...

OBJECTIVE To investigate the accuracy of manual needle placement and electrical stimulation guidance, compared using ultrasonography, for injection of botulinum toxin type A into the gastrocnemius muscle of adults with spastic equinus. DESIGN Prospective clinical study. SUBJECTS A total of 81 adults with stroke who were scheduled to receive botulinum toxin type A injection into the gastrocn...

Background: The post-dural puncture headache (PDPH) is a common complication in spinal anesthesia. Headache may occure seven days after dural puncture. The headache may be worsened in sitting position and be better in supine position. PDPH is common in younger and tall people. The incidence rate of PDPH related to the size of spinal needle and the number of try and decrease with small, cutting ...

Abstract Needles are key tools to realize minimally invasive interventions. Physicians commonly rely on subjectively perceived insertion forces at the distal end of needle when advancing tip desired target. However, detecting tissue transitions is difficult since sensed dominated by shaft forces. Disentangling has potential substantially improve placement accuracy.We propose a collaborative sys...

A computational method is presented for optimizing needle placement in radiofrequency ablation treatment planning. The parameterized search is guided by an objective function that depends on transient, finite element solutions of coupled thermal and potential equations for each needle placement. A framework is introduced for solving the electrostatic equation by using boundary elements to model...

INTRODUCTION One of the most common procedures employed in modern clinical practice is percutaneous needle insertion [1]. This procedure encompasses surgical operations such as prostate biopsy and brachytherapy where the accuracy of the needle placement is important. In order to correctly estimate needle tip location, physicians currently rely on their knowledge of anatomical landmarks, and on ...

We propose an augmented reality system to automatically identify lumbar vertebral levels and the lamina region in ultrasound-guided epidural anesthesia. Spinal needle insertion procedures require careful placement of a needle, both to ensure effective therapy delivery and to avoid damaging sensitive tissue such as the spinal cord. An important step in such procedures is the accurate identificat...

Epidural catheter (EC) migration is well documented entity in literature. However, most of these reports are consistent with introduction of Tuohy needle, either partially or completely, into intravascular, subdural and subarachnoid spaces prior to the placement of catheter. We report an intra-operative delayed migration of epidural catheter into subarachnoid space after apparently normal needl...

How to improve placement accuracy of needle insertion into liver tissue is of paramount interest to physicians. A robot-assisted system was developed to experimentally demonstrate its advantages in needle insertion surgeries. Experiments of needle insertion into porcine liver tissue were performed with conic tip needle (diameter 8 mm) and bevel tip needle (diameter 1.5 mm) in this study. Manual...