TY - GEN
T1 - Parking sensor-inspired approach to photoacoustic-guided hysterectomy demonstrated with human cadavers
AU - Wiacek, Alycen
AU - Wang, Karen C.
AU - Wu, Harold
AU - Lediju Bell, Muyinatu A.
N1 - Funding Information:
This work was supported by a Johns Hopkins Discovery Award and NSF CAREER Award ECCS-1751522. The authors thank John Thate and Karl Storz Endoskope for the generous use of their laparoscopic equipment and Michelle Graham and Eduardo Gonzalez for their assistance during the cadaver studies. We additionally acknowledge support from the Johns Hopkins Carnegie Center for Surgical Innovation.
Publisher Copyright:
© COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
PY - 2021
Y1 - 2021
N2 - Similar to the parking-assist sensors on modern automobiles, which alert drivers of impending impact to an object, we are developing an auditory photoacoustic-based guidance system to assist with avoidance of impending injuries to ureters during hysterectomy procedures. The contribution described in this paper considers international standards for medical alarms. The system was demonstrated during both open and laparoscopic hysterectomy procedures on two human cadavers. Using methylene blue to enhance ureter contrast, the proximity of a surgical tool tip to the ureter was measured using the visual information provided in photoacoustic images. Distance measurements were then successfully mapped to auditory signals, which increased in auditory frequency as the tool-to-ureter distance decreased to convey surgical tool proximity to the ureter. Fundamental frequencies increased from 150 Hz to 866 Hz for tool-to-ureter distances of 2.47 mm to 5 mm. These results are promising to assist with the avoidance of accidental ureteral injuries during hysterectomy and other procedures that suffer from similar challenges with regard to iatrogenic ureteral injuries.
AB - Similar to the parking-assist sensors on modern automobiles, which alert drivers of impending impact to an object, we are developing an auditory photoacoustic-based guidance system to assist with avoidance of impending injuries to ureters during hysterectomy procedures. The contribution described in this paper considers international standards for medical alarms. The system was demonstrated during both open and laparoscopic hysterectomy procedures on two human cadavers. Using methylene blue to enhance ureter contrast, the proximity of a surgical tool tip to the ureter was measured using the visual information provided in photoacoustic images. Distance measurements were then successfully mapped to auditory signals, which increased in auditory frequency as the tool-to-ureter distance decreased to convey surgical tool proximity to the ureter. Fundamental frequencies increased from 150 Hz to 866 Hz for tool-to-ureter distances of 2.47 mm to 5 mm. These results are promising to assist with the avoidance of accidental ureteral injuries during hysterectomy and other procedures that suffer from similar challenges with regard to iatrogenic ureteral injuries.
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U2 - 10.1117/12.2579023
DO - 10.1117/12.2579023
M3 - Conference contribution
AN - SCOPUS:85109102526
T3 - Progress in Biomedical Optics and Imaging - Proceedings of SPIE
BT - Photons Plus Ultrasound
A2 - Oraevsky, Alexander A.
A2 - Wang, Lihong V.
PB - SPIE
T2 - Photons Plus Ultrasound: Imaging and Sensing 2021
Y2 - 6 March 2021 through 11 March 2021
ER -