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Chen EY, Tse D, Hou H, Schreiber WA, Schaner PE, Kmiec MM, Hebert KA, Kuppusamy P, Swartz HM, Williams BB. Evaluation of a Refined Implantable Resonator for Deep-Tissue EPR Oximetry in the Clinic. Appl Magn Reson 2021; 52:1321-1342. [PMID: 34744319 PMCID: PMC8570533 DOI: 10.1007/s00723-021-01376-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 06/11/2021] [Accepted: 06/17/2021] [Indexed: 05/04/2023]
Abstract
OBJECTIVES (1) Summarize revisions made to the implantable resonator (IR) design and results of testing to characterize biocompatibility;(2) Demonstrate safety of implantation and feasibility of deep tissue oxygenation measurement using electron paramagnetic resonance (EPR) oximetry. STUDY DESIGN In vitro testing of the revised IR and in vivo implantation in rabbit brain and leg tissues. METHODS Revised IRs were fabricated with 1-4 OxyChips with a thin wire encapsulated with two biocompatible coatings. Biocompatibility and chemical characterization tests were performed. Rabbits were implanted with either an IR with 2 oxygen sensors or a biocompatible-control sample in both the brain and hind leg. The rabbits were implanted with IRs using a catheter-based, minimally invasive surgical procedure. EPR oximetry was performed for rabbits with IRs. Cohorts of rabbits were euthanized and tissues were obtained at 1 week, 3 months, and 9 months after implantation and examined for tissue reaction. RESULTS Biocompatibility and toxicity testing of the revised IRs demonstrated no abnormal reactions. EPR oximetry from brain and leg tissues were successfully executed. Blood work and histopathological evaluations showed no significant difference between the IR and control groups. CONCLUSIONS IRs were functional for up to 9 months after implantation and provided deep tissue oxygen measurements using EPR oximetry. Tissues surrounding the IRs showed no more tissue reaction than tissues surrounding the control samples. This pre-clinical study demonstrates that the IRs can be safely implanted in brain and leg tissues and that repeated, non-invasive, deep-tissue oxygen measurements can be obtained using in vivo EPR oximetry.
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Affiliation(s)
- Eunice Y. Chen
- Section of Otolaryngology, Department of Surgery, Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States and Geisel School of Medicine at Dartmouth, Hanover, NH
| | - Dan Tse
- Department of Radiology, Geisel School of Medicine at Dartmouth, Hanover, NH, United States
| | - Huagang Hou
- Department of Radiology, Geisel School of Medicine at Dartmouth, Hanover, NH, United States
| | - Wilson A. Schreiber
- Department of Radiology, Geisel School of Medicine at Dartmouth, Hanover, NH, United States
| | - Philip E. Schaner
- Section of Radiation Oncology, Department of Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States and Geisel School of Medicine at Dartmouth, Hanover, NH
| | - Maciej M. Kmiec
- Department of Radiology, Geisel School of Medicine at Dartmouth, Hanover, NH, United States
| | - Kendra A. Hebert
- Department of Radiology, Geisel School of Medicine at Dartmouth, Hanover, NH, United States
| | - Periannan Kuppusamy
- Department of Radiology, Geisel School of Medicine at Dartmouth, Hanover, NH, United States
| | - Harold M. Swartz
- Department of Radiology, Geisel School of Medicine at Dartmouth, Hanover, NH, United States
- Section of Radiation Oncology, Department of Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States and Geisel School of Medicine at Dartmouth, Hanover, NH
| | - Benjamin B. Williams
- Department of Radiology, Geisel School of Medicine at Dartmouth, Hanover, NH, United States
- Section of Radiation Oncology, Department of Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States and Geisel School of Medicine at Dartmouth, Hanover, NH
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Khan N, Hou H, Eskey CJ, Moodie K, Gohain S, Du G, Hodge S, Culp WC, Kuppusamy P, Swartz HM. Deep-tissue oxygen monitoring in the brain of rabbits for stroke research. Stroke 2015; 46:e62-6. [PMID: 25613304 DOI: 10.1161/strokeaha.114.007324] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Nadeem Khan
- From the Department of Radiology, EPR Center for the Study of Viable Systems, Geisel School of Medicine at Dartmouth, Hanover, NH (N.K., H.H., S.G., G.D., S.H., P.K., H.M.S.); Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, NH (N.K., H.H., S.G., P.K., H.M.S.); Department of Radiology, Dartmouth-Hitchcock Medical Center, Lebanon, NH (C.J.E.); Center for Comparative Medicine and Research, Dartmouth College, Hanover, NH (K.M.); and Department of Radiology, Interventional Radiology, University of Arkansas for Medical Sciences, Little Rock (W.C.C.).
| | - Huagang Hou
- From the Department of Radiology, EPR Center for the Study of Viable Systems, Geisel School of Medicine at Dartmouth, Hanover, NH (N.K., H.H., S.G., G.D., S.H., P.K., H.M.S.); Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, NH (N.K., H.H., S.G., P.K., H.M.S.); Department of Radiology, Dartmouth-Hitchcock Medical Center, Lebanon, NH (C.J.E.); Center for Comparative Medicine and Research, Dartmouth College, Hanover, NH (K.M.); and Department of Radiology, Interventional Radiology, University of Arkansas for Medical Sciences, Little Rock (W.C.C.)
| | - Clifford J Eskey
- From the Department of Radiology, EPR Center for the Study of Viable Systems, Geisel School of Medicine at Dartmouth, Hanover, NH (N.K., H.H., S.G., G.D., S.H., P.K., H.M.S.); Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, NH (N.K., H.H., S.G., P.K., H.M.S.); Department of Radiology, Dartmouth-Hitchcock Medical Center, Lebanon, NH (C.J.E.); Center for Comparative Medicine and Research, Dartmouth College, Hanover, NH (K.M.); and Department of Radiology, Interventional Radiology, University of Arkansas for Medical Sciences, Little Rock (W.C.C.)
| | - Karen Moodie
- From the Department of Radiology, EPR Center for the Study of Viable Systems, Geisel School of Medicine at Dartmouth, Hanover, NH (N.K., H.H., S.G., G.D., S.H., P.K., H.M.S.); Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, NH (N.K., H.H., S.G., P.K., H.M.S.); Department of Radiology, Dartmouth-Hitchcock Medical Center, Lebanon, NH (C.J.E.); Center for Comparative Medicine and Research, Dartmouth College, Hanover, NH (K.M.); and Department of Radiology, Interventional Radiology, University of Arkansas for Medical Sciences, Little Rock (W.C.C.)
| | - Sangeeta Gohain
- From the Department of Radiology, EPR Center for the Study of Viable Systems, Geisel School of Medicine at Dartmouth, Hanover, NH (N.K., H.H., S.G., G.D., S.H., P.K., H.M.S.); Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, NH (N.K., H.H., S.G., P.K., H.M.S.); Department of Radiology, Dartmouth-Hitchcock Medical Center, Lebanon, NH (C.J.E.); Center for Comparative Medicine and Research, Dartmouth College, Hanover, NH (K.M.); and Department of Radiology, Interventional Radiology, University of Arkansas for Medical Sciences, Little Rock (W.C.C.)
| | - Gaixin Du
- From the Department of Radiology, EPR Center for the Study of Viable Systems, Geisel School of Medicine at Dartmouth, Hanover, NH (N.K., H.H., S.G., G.D., S.H., P.K., H.M.S.); Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, NH (N.K., H.H., S.G., P.K., H.M.S.); Department of Radiology, Dartmouth-Hitchcock Medical Center, Lebanon, NH (C.J.E.); Center for Comparative Medicine and Research, Dartmouth College, Hanover, NH (K.M.); and Department of Radiology, Interventional Radiology, University of Arkansas for Medical Sciences, Little Rock (W.C.C.)
| | - Sassan Hodge
- From the Department of Radiology, EPR Center for the Study of Viable Systems, Geisel School of Medicine at Dartmouth, Hanover, NH (N.K., H.H., S.G., G.D., S.H., P.K., H.M.S.); Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, NH (N.K., H.H., S.G., P.K., H.M.S.); Department of Radiology, Dartmouth-Hitchcock Medical Center, Lebanon, NH (C.J.E.); Center for Comparative Medicine and Research, Dartmouth College, Hanover, NH (K.M.); and Department of Radiology, Interventional Radiology, University of Arkansas for Medical Sciences, Little Rock (W.C.C.)
| | - William C Culp
- From the Department of Radiology, EPR Center for the Study of Viable Systems, Geisel School of Medicine at Dartmouth, Hanover, NH (N.K., H.H., S.G., G.D., S.H., P.K., H.M.S.); Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, NH (N.K., H.H., S.G., P.K., H.M.S.); Department of Radiology, Dartmouth-Hitchcock Medical Center, Lebanon, NH (C.J.E.); Center for Comparative Medicine and Research, Dartmouth College, Hanover, NH (K.M.); and Department of Radiology, Interventional Radiology, University of Arkansas for Medical Sciences, Little Rock (W.C.C.)
| | - Periannan Kuppusamy
- From the Department of Radiology, EPR Center for the Study of Viable Systems, Geisel School of Medicine at Dartmouth, Hanover, NH (N.K., H.H., S.G., G.D., S.H., P.K., H.M.S.); Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, NH (N.K., H.H., S.G., P.K., H.M.S.); Department of Radiology, Dartmouth-Hitchcock Medical Center, Lebanon, NH (C.J.E.); Center for Comparative Medicine and Research, Dartmouth College, Hanover, NH (K.M.); and Department of Radiology, Interventional Radiology, University of Arkansas for Medical Sciences, Little Rock (W.C.C.)
| | - Harold M Swartz
- From the Department of Radiology, EPR Center for the Study of Viable Systems, Geisel School of Medicine at Dartmouth, Hanover, NH (N.K., H.H., S.G., G.D., S.H., P.K., H.M.S.); Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, NH (N.K., H.H., S.G., P.K., H.M.S.); Department of Radiology, Dartmouth-Hitchcock Medical Center, Lebanon, NH (C.J.E.); Center for Comparative Medicine and Research, Dartmouth College, Hanover, NH (K.M.); and Department of Radiology, Interventional Radiology, University of Arkansas for Medical Sciences, Little Rock (W.C.C.)
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