Surgical implement detector utilizing a powered marker

摘要: An apparatus for detecting a surgical implement (16) in human or animal tissue has means defining transmitting zone (14) encompassing wound (12) the tissue. A battery powered marker (20) is secured to positioned within (12). Field generating (27) are provided an electromagnetic field having predetermined frequency band. signal (22) generates The operative cause generate field, providing with identity. (30) antenna (32) located of detects irrespective marker's orientation therewithin.