Abstract #4460

Image Fusion of Ultrasound and Magnetic Resonance Imaging for Regional Anesthesia of the Hip: The Influence of MRI Scanning Position for Fusion Accuracy and Post Anesthesia Visualization of Anatomical Distribution of Local Anesthetics

Jennie Maria Christin Strid¹, Erik Morre Pedersen², Olga Vendelbo², Niels Dalsgaard¹, Yousef Nejatbakhsh³, Jens Randel Nyengaard⁴, Kjeld Søballe⁵, and Thomas Fichtner Bendtsen¹

¹Department of Anesthesiology, Aarhus University Hospital, Aarhus C, Denmark, ²Department of Radiology, Aarhus University Hospital, Aarhus C, Denmark, ³Hospital Pharmacy, Aarhus University Hospital, Aarhus C, Denmark, ⁴Electron Microscopy Lab and Stereology, Institute of Clinical Medicine, Aarhus University, Aarhus C, Denmark, ⁵Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus C, Denmark

Ultrasound guided lumbar plexus blocks holds the potential for reducing anesthesia related complications in hip surgery in the elderly punctum. The ultrasound guidance is, however, imprecise and associated with epidural spread of local anesthetic due to limited visualization. It is the overall aim of this study to improve the quality of lumbar plexus blocks using Fusion imaging between MRI and ultrasound. Here we report preliminary results of the impact of different MR scanning positions for the accuracy of fusion imaging and report on the feasibility of using gadolinium doped anesthetics for studying the distribution of local anesthetic fluid using MRI.

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