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Continuous Intraspinal Narcotic Analgesia: Technical Aspects of an Implantable Infusion System
  1. Dennis W. Coombs, M.D.,
  2. Richard L. Saunders, M.D. and
  3. Mark G. Pageau, R.N.
  1. From the Sections of Anesthesiology and Neurosurgery, Department of Surgery, Dartmouth-Hitchcock Medical Center, Hanover, New Hampshire


A totally implantable system for administering continuous intraspinal narcotic analgesia (CINA) has been evaluated. The system combines an implanted Silastic® intraspinal catheter connected in series with an implanted Infusaid® reservoir. To date, 13 patients have been treated with this system and have been followed for periods up to eight months. Constant intraspinal flow rates with morphine have been observed with no incidences of catheter or pump infection, respiratory depression, or pump failure.

  • Intraspinal infusion
  • constant
  • morphine
  • Regional anesthetic techniques
  • Narcotic analgesics

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  • This work was supported in part by grants from the Kingsbury Fund, Keene, New Hampshire, and the Robert C. Osgood, Jr., Memorial Fund, Claremont, New Hampshire.

    Address reprint requests to Dr. Coombs: Director of Clinical Investigation, Department of Surgery (Anesthesiology), Dartmouth‐Hitchcock Medical Center, Hanover, NH 03755.