Hemostatic agents in laparoscopic surgery

Hengrasmee, Pattaya; Ito, Traci; Lam, Alan

doi:10.1201/9781351006507-37

Cited by 2 publications

(4 citation statements)

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“…The energy device in the surgical system market is also expected to grow at an annual average of approximately 10.8%, reaching $ 5.2 billion by 2025 [ 12 ]. Because of increased minimally invasive and laparoscopic surgeries, the USSs for soft tissues are increasing [ 13 ]. Recently, Covidien Corporation has developed a wireless-type USS with unique battery power modules [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

“…The wireless ultrasound surgical instrument (WUSS) is composed of a hand-piece, hand, and generator instrument with a battery module, including charger parts [ 15 ]. In the hand-piece, acoustic vibration at a specific frequency is generated in the UT modules [ 13 ]. In the hand instrument, customers or physicians can control the coagulation, incision, and hemostasis operations [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

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Wireless Ultrasound Surgical System with Enhanced Power and Amplitude Performances

Kim

You

Choe³

et al. 2020

Sensors

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A wireless ultrasound surgical system (WUSS) with battery modules requires efficient power consumption with appropriate cutting effects during surgical operations. Effective cutting performances of the ultrasound transducer (UT) should be produced for ultrasound surgical knives for effective hemostasis performance and efficient dissection time. Therefore, we implemented a custom-made UT with piezoelectric material and re-poling process, which is applied to enhance the battery power consumption and output amplitude performances of the WUSS. After the re-poling process of the UT, the quality factor increased from 1231.1 to 2418 to minimize the unwanted heat generation. To support this UT, we also developed a custom-made generator with a transformer and developed 2nd harmonic termination circuit, control microcontroller with an advanced reduced instruction set computer machine (ARM) controller, and battery management system modules to produce effective WUSS performances. The generator with a matching circuit in the WUSS showed a peak-to-peak output voltage and current amplitude of 166 V and 1.12 A, respectively, at the resonant frequency. The performance with non-contact optical vibrators was also measured. In the experimental data, the developed WUSS reduced power consumption by 3.6% and increased the amplitude by 20% compared to those of the commercial WUSS. Therefore, the improved WUSS performances could be beneficial for hemostatic performance and dissection time during surgical operation because of the developed UT with a piezoelectric material and re-poling process.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wireless Ultrasound Surgical System with Enhanced Power and Amplitude Performances

Kim

You

Choe³

et al. 2020

Sensors

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show abstract

“…As the demand for minimally invasive surgery with fewer surgical scars and rapid patient recovery increases, the use of electro-surgery and ultrasound surgery machines continues to be on the rise [24]. Ultrasonic surgical machines are less damaged by heat at the incision area than electro-surgery machines, and they are cheaper and easier to operate than laser surgical machines [25].…”

Section: Introductionmentioning

confidence: 99%

“…In 2013, Covidien provided the wireless ultrasound surgical instrument (product name: Sonicision) to provide freedom of movement because of wire reduction [26]. In 2015, Ethicon Corp. manufactures the wire ultrasound surgical instrument (product name: Ethicon) to carry out hemostasis on blood vessels up to 7 mm in length [24]. In 2016, Lotus supplied the wire ultrasound surgery scalpel to generate torsional rotation instead of linear motion in order to increase the power efficiency [25].…”

Section: Introductionmentioning

confidence: 99%

Development of an Accurate Resonant Frequency Controlled Wire Ultrasound Surgical Instrument

Kim

Choe³

et al. 2020

Sensors

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Our developed wire ultrasound surgical instrument comprises a bolt-clamped Langevin ultrasonic transducer (BLUT) fabricated by PMN-PZT single crystal material due to high mechanical quality factor and electromechanical coupling coefficient, a waveguide in the handheld instrument, and a generator instrument. To ensure high performance of wire ultrasound surgical instruments, the BLUT should vibrate at an accurate frequency because the BLUT’s frequency influences hemostasis and the effects of incisions on blood vessels and tissues. Therefore, we implemented a BLUT with a waveguide in the handheld instrument using a developed assembly jig process with impedance and network analyzers that can accurately control the compression force using a digital torque wrench. A generator instrument having a main control circuit with a low error rate, that is, an output frequency error rate within ±0.5% and an output voltage error rate within ±1.6%, was developed to generate the accurate frequency of the BLUT in the handheld instrument. In addition, a matching circuit between the BLUT and generator instrument with a network analyzer was developed to transfer displacement vibration efficiently from the handheld instrument to the end of the waveguide. Using the matching circuit, the measured S-parameter value of the generator instrument using a network analyzer was −24.3 dB at the resonant frequency. Thus, our proposed scheme can improve the vibration amplitude and accuracy of frequency control of the wire ultrasound surgical instrument due to developed PMN-PZT material and assembly jig process.

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Hemostatic agents in laparoscopic surgery

Cited by 2 publications

References 0 publications

Wireless Ultrasound Surgical System with Enhanced Power and Amplitude Performances

Wireless Ultrasound Surgical System with Enhanced Power and Amplitude Performances

Development of an Accurate Resonant Frequency Controlled Wire Ultrasound Surgical Instrument

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