MAGNETIC ANATOMICAL MARKER AND METHOD OF USE

WIPO Patent Application WO2000051514

B1

An anatomical marker uses a permanent magnet to indicate a selected location within a patient. The magnet is enclosed within a non-degradable envelop and is coupled to a retention member that is preferably manufactured from a biodegradable material, such as a polyglucuronic acid based material. The retention member may include one or more barbs to retain the anatomical marker in the selected location. An insertion tool, usable with an endoscope, can insert the anatomical marker. A retention magnet is fixedly attached to the insertion tool and holds the anatomical marker in place due to the attractive magnetic forces between the retention magnet and the marker magnet in the non-biodegradable envelope. When the anatomical marker is securely fastened at the selected location in the patient, the forces exerted by the patient's body on the retention member exceed the attractive magnetic forces between the retention magnet and the magnet in the envelope, thus causing the anatomical marker to be released from the insertion tool. The location of the magnet may be subsequently detected using a magnetic detector system.

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SINANAN MIKA N (US)
SOMOGYI CHRISTOPHER P (US)
GOLDEN ROBERT N (US)
SILVERSTEIN FRED E (US)
GONZALES ANDREI J (US)

PCT/US2000/005776

November 30, 2000

February 29, 2000

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LUCENT MEDICAL SYSTEMS INC (US)
SINANAN MIKA N (US)
SOMOGYI CHRISTOPHER P (US)
GOLDEN ROBERT N (US)
SILVERSTEIN FRED E (US)
GONZALES ANDREI J (US)

A61B19/00; A61B17/00; (IPC1-7): A61B19/00

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