Electrosurgical device
a surgical device and electrode technology, applied in the field of electrosurgical devices, can solve the problems of adversely affecting surgeon visibility and patient anatomy, current to follow unintended paths, etc., and achieve the effects of improving the coagulation and ablation performance, improving the rf field consistency of rf electrodes, and reducing the conductivity of current paths
Pending Publication Date: 2022-03-03
GYRUS MEDICAL LTD
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Benefits of technology
This patent is about an improved surgical instrument that improves the consistency of RF field for better RF coagulation and ablation. The instrument has a complex layout that can cause current to flow in unintended paths, which affects the consistency of the RF field. To solve this problem, the instrument has an insulating portion between the electrodes and the inner cutting member to reduce conductivity and improve RF field consistency. This also reduces shedding and unwanted particulate matter that can affect surgeon visibility and patient anatomy.
Problems solved by technology
In a system that provides both bipolar RF functions and a cutting action, the end effector has a complex layout which can cause current to follow unintended paths from the electrodes to other sections of the end effector, such as a rotating cutting edge.
This minimises the generation of unwanted particulates within the surgical site, which could adversely affect surgeon visibility and patient anatomy.
Method used
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Embodiment Construction
[0031]Referring to the drawings, FIG. 1 shows electrosurgical apparatus including an electrosurgical generator 1 having an output socket 2 providing a radio frequency (RF) output, via a connection cord 4, for an electrosurgical instrument 12. The instrument 12 has a suction tube 14 which is connected to a suction source 10. Activation of the generator 1 may be performed from the instrument 12 via a handswitch (not shown) on the instrument 12, or by means of a footswitch unit 5 connected separately to the rear of the generator 1 by a footswitch connection cord 6. In the illustrated embodiment, the footswitch unit 5 has two footswitches 5a and 5b for selecting a coagulation mode or a cutting or vaporisation (ablation) mode of the generator 1 respectively, although in some embodiments of the electrosurgical instrument 12 described herein it is envisaged that only one or other of the coagulation or ablation modes would be used, with cutting being provided mechanically by way of a rotati...
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Abstract
A surgical instrument is configured to reduce conductivity between an RF electrosurgical portion and a cutting portion. This reduces improves the efficiency and consistency of the generated RF field, with higher current densities nearest the target tissue, improving the performance of the RF electrosurgical instrument. The conductivity may be reduced using a layer of insulating material, a projecting insulating portion or a cutting portion constructed from an insulating material. Further, by providing a lubricous insulating layer shedding may be reduced, increasing the usable life of the cutting portion.
Description
TECHNICAL FIELD[0001]Embodiments of the present invention described herein relate to an electrosurgical device, and in particular to an electrosurgical device wherein a means of reducing conductivity is provided between a first cutting portion and a pair of electrodes so as to improve the performance of the device.[0002]Background to the Invention and Prior Art A prior art arrangement, U.S. Pat. No. 7,150,747 B1, describes a surgical device with a blade used to cut tissue mechanically and to coagulate cut tissue. The blade is electrically conductive and serves as an active electrode in a bipolar arrangement with a return electrode. Electrical energy is transferred to the blade through an electrical connection between the distal region of the blade and a second member which has a lumen for receiving the first member.SUMMARY OF THE INVENTION[0003]Embodiments of the present invention provide an improved electrosurgical instrument configured to improve the RF field consistency of RF ele...
Claims
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IPC IPC(8): A61B18/14A61B18/12
CPCA61B18/14A61B2018/00601A61B18/1206A61B2018/126A61B2218/007A61B2018/00083A61B2018/00202A61B2018/00577A61B2018/00589A61B2018/00607A61B2018/0091A61B2217/005A61B18/148A61B18/1482A61B18/149A61B2018/167A61B2018/00142A61B2018/00136A61B2018/1497A61B2018/00208A61B17/32002A61B17/1659A61B2018/1467A61B18/1402A61B2018/00178A61B2018/00916
Inventor MCALEER, LIAM JOHNLLOYD, THOMASDICKSON, JAMES ALAN
Owner GYRUS MEDICAL LTD