1. Technical Field
The present disclosure relates to a device and method for separating and cooling energy transmission conduits from other objects. More particularly, the present disclosure relates to cable stand-offs configured to isolate energy transmission conduits of electrosurgical systems.
2. Background of Related Art
Electrosurgical systems are well known in the art. Some electrosurgical systems employ radiofrequency and microwave energy to produce a number of therapeutic effects in and/or on tissue at a target surgical site during any number of non-specific surgical procedures. Many electrosurgical systems transmit microwave energy as well as other kinds of energy through conduits including wires, cables, tubing or other energy transmission devices. Generally, the energy transmitted through the conduits of these electrosurgical systems produces unwanted heat build-up in such conduits. To address this heat build-up and other related issues, many insulators, stand-offs and the like have been devised.
For instance, one electrical insulator, used in conjunction with energy transmitting conduits, includes a laminated tube. The laminated tube serves as a support for a cover made of elastomeric material. The cover is comprised of a plurality of annular fins. Further, the laminated tube has circular and helical groves.
A second type of electrical insulator comprises a body including holes for receiving heater wires, and a plurality of radially projecting points or ribs extruding therefrom. The points or ribs are dimensioned so that the outside of the body of the electrical insulator may be disposed into a cathode sleeve and will be centered in said sleeve.
The present disclosure relates to a cable stand-off. An embodiment of the cable stand-off includes an elongated member defining a lumen therethrough and a plurality of fins extending from an outer surface of the elongated member. The elongated member is configured to receive at least one energy transmission conduit therein and is made of a thermally insulative material. The plurality of fins are arranged in sets of fins longitudinally spaced apart from one another. Each set of fins is disposed around an outer periphery of the elongated member. In one embodiment, the elongated member extends along a portion of a length of the conduit. In one particular embodiment, the elongated member extends along an entire length of the conduit. The cable stand-off may additionally include a plurality of elongated members supported on the conduit. These elongated members are longitudinally spaced apart from one another. In yet another embodiment, each fin extends radially away from a respective elongated member. At least one of the fins has a rectangular cross-section or any other suitable shape.
In another embodiment of the present disclosure, the cable stand-off includes an elongated member. At least a portion of the elongate member has a helical shape. The elongated member surrounds at least a portion of a length of at least one energy transmission conduit. In this embedment, the elongated member is formed of thermally insulative material. In one embodiment, the elongated member extends at least a portion of a length of the conduit. An embodiment of the presently disclosed cable stand-off has an elongated member extending along substantially an entire length of the conduit. In another embodiment, the elongated member includes helical segments jointed to one another by bridges. These helical segements may be longitudinally spaced apart from one another. In an embodiment, at least one of the bridges extends longitudinally between adjacent helical segements.
The present disclosure also describes another embodiment of the cable stand-off. This embodiment includes an elongated member surrounding at least a portion of a length of an energy transmission conduit. The elongated member is made of a non-flammable, low particulate, flexible fiber material. This material exhibits low thermal conductivity. In one embodiment, the elongated member extends along at least a portion of a length of the conduit. In another embodiment, the elongated member extends along an entire length of the conduit. The elongated member may include a woven or mesh sleeve. The low thermal conductivity material may include synthetic or natural fiber. In addition, the low thermal conductivity material may include fiberglass or polymer-based fiber. The material with low thermal conductivity may have an a bi-directional or unidirectional arrangement
Embodiments of the present disclosure are disclosed herein with reference to the accompanying drawings, wherein:
Embodiments of the presently disclosed cable stand-off are now described in detail or corresponding elements in each of the several views. Terms such as “above”, “below”, “forward”, “rearward”, etc. refer to the orientation of the figures or the direction of components and are simply used for convenience of description.
During invasive treatment of diseased areas of tissue in a patient, the insertion and placement of an electrosurgical energy delivery apparatus, such as an RF or a microwave ablation device, relative to the diseased area of tissue is important for successful treatment. Generally, electrosurgical energy delivery apparatuses employ energy to produce a plurality of therapeutic effects in tissue at a target surgical site during any number of non-specific surgical procedures. Such apparatuses usually include conduits in the form of a cable, wire, tubing or other elongated member suitable for transmitting energy. The energy transmitted through the conduit generally heats the conduit and may result in heat transfer to the adjacent environment, structure, and individuals. The devices hereinbelow described allow for cooling, separation and/or isolation of the heated conduits from users and patients.
A cable stand-off in accordance with an embodiment of the present disclosure is generally referred to in
As seen in
As depicted in
In one embodiment, cable stand-off 100 may extend along substantially the entire length of conduit “C”. Alternatively, as seen in
In use, raised profile 104 of cable stand-off 100 increases the cooling area of cable stand-off 100, thereby increasing the convective cooling of conduit “C”. Additionally, raised profile 104 effectively separates conduit “C” from users and patients and from adjacent conduits and the like. Cable stand-off 100 may be configured to be used with microwave ablation devices, RF ablation devices, or in combination with any other medical device having conduits transmitting electrosurgical energy.
Turning now to
Cable stand-off 200 may be formed of a suitable thermally insulative material, such as for example cardboard or paper. Further, cable stand-off 200 may be configured for enhancing heat transfer along conduit “C” by facilitating convective cooling throughout the entire length of conduit “C”. In other embodiments, cable stand-off 200 is formed from an electrically and thermally insulative material.
Turning now to
In use, cable stand-off 200 isolates conduit “C”, thereby preventing contact between conduit “C” and a user or patient. Cable stand-off 200 may also serve as a cable management system separating conduit “C” from other cables, wires or tubes.
Turning now to
In use, elongated member 302 of cable stand-off 300 separates conduit “C” from users and patients, and from adjacent conduits and the like. In addition, airflow may circulate through the cross-sectional area of elongated member 302 and convectively cool conduit “C”. Users may stretch elongated member 302 and position it over structures contiguous to conduit “C”.
In an alternative embodiment, as seen in
In use, cable stand-off 300 isolates and separates conduit “C” from users and patients, and from other conduits and the like. In this embodiment, airflow may also travel through the cross-sectional area of elongated member 302 and convectively cool conduit “C”.
The applications of the cable stand-offs and methods of using the stand-offs discussed above are not limited to electrosurgical systems used for microwave ablation, but may include any number of further electrosurgical applications. Modification of the above-described cable stand-offs and methods for using the same, and variations of aspects of the disclosure that are obvious to those of skill in the art are intended to be within the scope of the claims.
The present application claims priority to, and the benefit of, U.S. Provisional Patent Application Ser. No. 60/975,891, filed on Sep. 28, 2007, the entire contents of which are hereby incorporated by reference.
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