Surgery – Miscellaneous – Devices placed entirely within body and means used therewith
Patent
1993-09-14
1995-06-20
Cohen, Lee S.
Surgery
Miscellaneous
Devices placed entirely within body and means used therewith
A61B 505
Patent
active
054253829
ABSTRACT:
There is disclosed an apparatus and method for locating a medical tube within the body of a patient. The medical tube is located by a detection apparatus which senses the static magnetic field strength gradient generated by a magnet associated with the medical tube and indicates the value of the gradient to the user. The detection apparatus is moved about the body of the patient until the greatest gradient magnitude is indicated. The detection apparatus distinguishes the field strength of the magnet associated with the medical tube from the earth's field strength by sensing the magnet's field strength at two different distances from the magnet.
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Golden Robert N.
Silverstein Fred E.
Cohen Lee S.
Green Brian M.
University of Washington
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