Bone Tumor Clinical Trial
Official title:
A Single-center Study Investigating the Utility of Indocyanine Green (ICG) Fluorescence Imaging in Patients With Benign Bone Tumors Requiring Intralesional Operative Management
Patients with a biopsy-proven benign bone tumor for which standard of care is intralesional operative management will receive a weight-appropriate IV dose of indocyanine green (ICG, FDA-approved) the day prior to surgery during their standard pre-operative clinic visit. On the day of surgery, fluorescence images will be obtained using a non-invasive fluorescence camera.
ICG fluorescence imaging has been used to assess tissue perfusion in vivo in real-time intra-operative arterial and lymphatic perfusion imaging and osseous flap perfusion imaging. Compared to the conventional medical imaging modalities, such as computed tomography (CT) or magnetic resonance imaging (MRI), ICG fluorescence imaging is nonionizing, low-cost, and portable. ICG is a dye that absorbs near-infrared light in the wavelength range between 790 to 805 nm and has an emission at the peak of 835 nm. ICG is almost 98% plasma protein-bound so that once it is received in the microcirculation, it remains within the lymphatic and circulatory vasculature unless inflammation is present. ICG has been approved for clinical use by the Food and Drug Administration (FDA) since 1959. Since then, ICG has been used in humans for angiography in ophthalmology and cardiology applications and is given routinely to patients in these clinical settings. ICG fluorescence imaging has also been used to guide laparoscopic surgery, robotic adrenalectomy, assess tissue perfusion in vivo in real-time intra-operative arterial and lymphatic perfusion imaging, and tissue flap perfusion imaging. ICG is ideal to measure perfusion/blood flow because it binds efficiently to blood lipoproteins and thus does not leak from circulation under normal circumstances. In addition, the ICG half-life is short making repeated measures possible, and it is indirectly activated, so that the dynamic fluorescence due to bone and tissue perfusion can be captured by a video rate imaging system. The dynamic fluorescence imaging systems to be used in this study will be preferentially the Pentero surgical microscope (Zeiss, Germany), Spy Elite Imaging System or SPY Portable Handheld Imaging (SPY-PHI) System (Novadaq/Stryker), or another imager may be used. These imagers are commercially available imaging systems that are used to assess tissue perfusion in real time in the operating room. The systems have a multi-directional imaging arm which contains a near-infrared light source that illuminates the fluorescent agent within the tissues, a high definition (HD) video camera that captures the intensity of fluorescent marker in real-time, and software that allows the user to capture relative and absolute perfusion values within the surgical field. These products are FDA-approved for use to monitor blood flow, plastic surgery, microsurgery, reconstructive surgery, gastrointestinal imaging and coronary bypass surgery. ;
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