Detection of large vessels during parenchymal dissection using smart blade

Abstract

An ultrasonic device may include an electromechanical ultrasonic system defined by a predetermined resonant frequency and include an ultrasonic transducer coupled to an ultrasonic blade, A method of delivering energy to the device may include applying energy to the blade at a first power level via the transducer coupled to the blade, measuring a complex impedance of the transducer, receiving a complex impedance feedback data point, comparing the complex impedance feedback data point to a reference complex impedance characteristic pattern, and determining that the blade is contacting a vessel based on the comparison. The method may also include disabling the power applied to the transducer and switching to a lower power level. The method may further include generating a warning that the blade is contacting a vessel, such as a light or a sound. An ultrasonic surgical instrument may effect the method.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Nonprovisional Patent Application Serial No. 16 / 144,472, filed September 27, 2018, entitled "DETECTION OF LARGE VESSELSDURING PARENCHYMAL DISSECTION USING A SMART BLADE," the disclosure of which is reproduced in its entirety as Incorporated herein by reference. [0003] This application also claims the benefit of U.S. Provisional Patent Application Serial No. 62 / 640,415, filed March 8, 2018, entitled "ESTIMATING STATE OF ULTRASONICEND EFFECTOR AND CONTROL SYSTEM THEREFOR," the disclosure of which is incorporated by reference in its entirety into this article. Background technique [0004] In a surgical environment, smart energy devices may need to be within a smart energy architecture environment. Ultrasonic surgical devices, such as ultrasonic scalpels, are used in a variety of applications in surgery because of their unique performance characteristics. Depending on the pa...

AI Technical Summary

Problems solved by technology

Additionally, in situations where instruments are disposable or interchangeable with handpieces, ultrasound and electrosurgical generators are limited in their ability to identify the specific instrument configuration being used and optimize control and diagnostic procedures accordingly

Additionally, capacitive coupling between the generator's non-isolated and patient-isolated circuits, especially when using higher voltages and frequencies, can result in patient exposure to unacceptable levels of leakage current

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