Mareike Klee,Christianus Martinus Van Heesch,Peter Dirksen,Ruediger Mauczok,Nico Maris Adriaan De Wild
申请号：
US13384879
公开号：
US20120123270A1
申请日:
2010.07.26
申请国别(地区):
US
年份:
2012
代理人:
摘要：
The invention proposes to equip the tip of a surgical instrument such as a needle or catheter or any other instrument with an ultrasound transducer array to measure flow just in front of the tip by means of time and frequency differences between the sent and received pulses. Since no image is required, only a few transducer elements are required. The transducer elements generate a pressure pulses in specific directions and receives its echos without the use of imaging techniques and complex driving electronics. Using the frequency shift and time delay of the received signals the proximity and lateral direction of the blood flow may be detected, thus identifying blood vessels.
