Methods and chemical preparations for time-limited marking of biopsy sites
First Claim
1. A marker for marking a cavity site within the body of a mammalian patient from which a tissue sample has been removed, said marker formed at least in part of a clearance delaying component, and being characterized by remaining present at the cavity site in sufficient quantity to permit detection and location of the cavity site for at least a predetermined first time period after introduction to the cavity site.
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Abstract
Detectable markers that may be introduced into a cavity created by removal of a biopsy specimen to mark the location of the biopsy site so that it may be located in a subsequent medical/surgical procedure. The markers remain present in sufficient quantity to permit detection and location of the biopsy site at a first time point (e.g., 2 weeks) after introduction but clear from the biopsy site or otherwise not interfere with imaging of tissues adjacent the biopsy site at a second time point (e.g., 5-7 months) after introduction.
195 Citations
36 Claims
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1. A marker for marking a cavity site within the body of a mammalian patient from which a tissue sample has been removed, said marker formed at least in part of a clearance delaying component, and being characterized by remaining present at the cavity site in sufficient quantity to permit detection and location of the cavity site for at least a predetermined first time period after introduction to the cavity site.
- 2. An intracorporeal marker for marking a cavity site within the body of a mammalian patient from which A tissue sample has been removed, comprising a mass of material that is detectable by at least two remote imaging detection methods when introduced into the cavity site from which tissue has been removed, that remains detectable at the cavity site for at least a predetermined first time period after its introduction into the cavity site and that does not interfere worth imaging of tissue adjacent the cavity site during a predetermined second period of time after the first period of time.
Specification