Passive ultrasound needle probe locator
Patent 4431006 Issued on February 14, 1984. Estimated Expiration Date: 
January 7, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 7, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3556079 3721227 3896811 Ultrasound applicator with guide slot for puncturing cannula Ultrasonic arrangement for puncturing internal body organs, vessels and the like Transducer probe for pulse-echo ultrasonic exploration Ultrasound needle tip localization system Endodontic flow-through ultrasonic instrument holder device Patent #: 4330278 InventorsAssigneeApplicationNo. 06/337899 filed on 01/07/1982US Classes:600/461, Associated with puncturing instrument601/2UltrasonicExaminersPrimary: Howell, Kyle L.Assistant: Jaworski, Francis J. International ClassesA61B 17/34 (20060101)A61B 1/00 (20060101) A61B 10/00 (20060101) A61B 17/32 (20060101) AbstractA solid steel stylet is carried coaxially within a hollow biopsy needle. The stylet carries a matching layer at its tip, such that when the needle and stylet are inserted into the body, ultrasound energy impinging on the needle tip is converted to pressure waves which are conveyed back up the stylet. An ultrasound transducer located outside the body is coupled to receive sonic energy from the stylet, and to convert it to electrical energy for coordination with, and superposition upon the image of the system.Other References
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