High-frequency Electric Knife
High-frequency Electric Knife - Related Videos
10:25
Specimen Preparation, Imaging, and Analysis Protocols for Knife-edge Scanning Microscopy
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Cited by 15 •
2011
The full process from brain specimen preparation to serial sectioning imaging using the Knife-Edge Scanning Microscope, to data visualization and analysis is described. This technique is currently used to acquire mouse brain data, but it is applicable to other organs, other species.
12:20
Fabrication of Carbon Nanotube High-Frequency Nanoelectronic Biosensor for Sensing in High Ionic Strength Solutions
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Cited by 7 •
2013
We describe the device fabrication and measurement protocol for carbon nanotube based high frequency biosensors. The high frequency sensing technique mitigates the fundamental ionic (Debye) screening effect and allows nanotube biosensor to be operated in high ionic strength solutions where conventional electronic biosensors fail. Our technology provides a unique platform for point-of-care (POC) electronic biosensors operating in physiologically relevant conditions.
06:50
Electric Potential
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2023
Source: Yong P. Chen, PhD, Department of Physics & Astronomy, College of Science, Purdue University, West Lafayette, IN Electric potential, also known as "voltage", measures the electric potential energy per unit charge. Electric field is a scalar quantity and is fundamental to many electrical effects. Like potential energy, what is physically meaningful is the difference in the electric potential. For example, the spatial variation in the electric potential is related to the electric...
09:38
Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
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Cited by 4 •
2015
We describe the generation of far-infrared radiation using an optically pumped molecular laser along with the measurement of their frequencies with heterodyne techniques. The experimental system and techniques are demonstrated using difluoromethane (CH2F2) as the laser medium whose results include three new laser emissions and eight measured laser frequencies.
04:53
Electrical Safety
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2023
Robert M. Rioux & Suprita Jharimune, Pennsylvania State University, University Park, PA Among the many hazards present in the laboratory, electrical hazards are one of the most common we must be cognizant of since most of the laboratory equipment we use requires electricity for operation. Improper handling or operation of electrical devices might lead to electric shock with the potential risk of injury or even death. Electric sparks can lead to fire or explosion (since many flammable...
FAQs
The active electrode transfers alternating current into tissue, and the tissue’s electrical resistance converts that energy into localized heat. When the generated heat is sufficient to vaporize tissue, the result is cutting. Under different energy delivery conditions, heat instead denatures proteins, producing coagulation and helping control bleeding. Thus, tissue effect depends on how energy becomes heat at the contact site.
Waveform, power, and contact conditions strongly influence the surgical result. A combination that concentrates enough heat to vaporize tissue supports cutting, whereas conditions that promote protein denaturation favor coagulation. Because these variables change how heat develops locally, selecting them appropriately helps match the instrument’s effect to the intended task and reduces the likelihood of unwanted tissue damage.
Electrical resistance determines how much of the delivered alternating current is converted into heat within tissue. When that heat remains localized, the surgeon can use it for focused dissection or hemostasis. If energy delivery produces unintended thermal spread, nearby tissue may be injured. Understanding this relationship therefore supports more deliberate setting selection and safer use of the instrument.
A conventional blade separates tissue mechanically, whereas this technique uses electrically generated heat to create tissue effects. The same instrument can support dissection and bleeding control, rather than relying only on a blade followed by separate hemostatic measures. Its value is therefore not simply replacing a cutting edge, but combining tissue separation with localized coagulation during a procedure.
Settings should be chosen according to the intended tissue effect, especially whether the goal is vaporization for cutting or protein denaturation for coagulation. Waveform, power, and contact conditions all affect the heat produced at the active electrode. Matching these variables to the surgical task helps support precise dissection or hemostasis while limiting unintended thermal injury.
The instrument is used in both open and minimally invasive surgery, where it can support tissue dissection and bleeding control. Its ability to produce either cutting or coagulating effects makes it relevant when surgeons need to separate tissue while addressing hemostasis during the same procedure. The specific settings and contact conditions determine which outcome is emphasized.
Appropriate application can provide precise dissection, localized control of bleeding, and reduced reliance on conventional blades. These outcomes arise from directing electrical energy through an active electrode and selecting conditions that produce the desired thermal response. In medicine, understanding the resulting tissue effects is important because the benefits of control and efficiency depend on limiting unintended thermal injury.