| 摘要 |
A surgical retractor comprises an arm having a first end and a second end. A blade has an outer surface and a contact surface. The blade is fixed to at least one of the first end and the second end of the arm. A transducer is disposed on the contact surface of the blade. A Doppler ultrasound sensor is in electrical communication with the transducer. The transducer transmits signals to the Doppler ultrasound sensor that can be used to calculate blood flow rate proximate to a surgical site where the surgical retractor is being used.
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