# Patent

## Title
Cable stand-off

## Abstract

The different embodiments of the cable stand-off serve as a thermally inslutative protector. In one embodiment, 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, wherein the plurality of fins includes sets of fins, each set of fins being spaced a longitudinal distance from one another and being positioned around a circumference of the elongated member. Another embodiment of the cable stand-off comprises an elongated member having a helical shape and surrounding at least a portion of a length of at least one energy transmission conduit. In yet another embodiment, a cable stand-off comprises an elongated surrounding at least a portion of a length of an energy transmission conduit, wherein the elongated member is made of a non-flammable, low particulate, flexible fiber material.

## Background
CROSS-REFERENCE TO RELATED APPLICATION
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.


BACKGROUND
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.
SUMMARY
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



BRIEF DESCRIPTION OF THE DRAWINGS
Embodiments of the present disclosure are disclosed herein with reference to the accompanying drawings, wherein:
FIG. 1 is a perspective view of a cable stand-off according to an embodiment of the present disclosure;
FIG. 2 is a side elevational view of the cable stand-off of FIG. 1;
FIG. 3 is an elevational end view of the cable stand-off of FIGS. 1 and 2;
FIG. 4 is a perspective view of cable stand-off according to another embodiment of the present disclosure;
FIG. 5 is a side elevational view of the cable stand-off of FIG. 4;
FIG. 6 is a perspective view of a cable stand-off according to yet another embodiment of the present disclosure;
FIG. 7 is a side elevational view of the cable stand-off of FIG. 6;
FIG. 8 is a transverse cross-sectional view of the cable stand-off of FIGS. 6 and 7, as taken through 8-8 of FIG. 7;
FIG. 9 is a perspective view of the cable stand-off according to a further embodiment of the present disclosure;
FIG. 10 is a side elevational view of the cable stand-off of FIG. 9;
FIG. 11 is a perspective view of a cable stand-off according to another embodiment of the present disclosure;
FIG. 12 is a side elevational view of the cable stand-off of FIG. 11;
FIG. 13 is a transverse cross-sectional view of the cable stand-off of FIGS. 11 and 12, as taken through 13-13 of FIG. 12;
FIG. 14 is a perspective view of a cable stand-off according to yet another embodiment of the present disclosure;
FIG. 15 is a side elevational view of the cable stand-off of FIG. 14.



DETAILED DESCRIPTION OF THE EMBODIMENTS
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 FIGS. 1-5 as reference numeral 100. Referring initially to FIGS. 1-3, cable stand-off 100 includes an elongated member 102 having a plurality of raised profile 104 extending therefrom. Elongated member 102 defines a lumen 108 therethrough and a longitudinal axis “X”. Additionally, elongated member 102 of cable stand-off 100 may be made of any suitable material, such as one exhibiting low thermal conductivity. Lumen 108 of member 102 is configured for receiving at least one conduit, in the form of a cable, a wire or a tubing “C”. Conduit “C” transmits energy from an energy generator “G” to a probe “P”. Energy generator “G,” which may be any suitable generator operable to supply any suitable form of energy, supplies energy to probe “P”. In turn, probe “P” emits, emanates, or radiates such energy at a specific surgical site.
As seen in FIGS. 1-3, each raised profile 104 may be in the form a fin 110. Fins 110 may be extruded from an outer surface of elongated member 102 and/or affixed (e.g., welded) to the outer surface of elongated member 102, using any suitable technique. In one embodiment, each fin 110 extends in a substantially radial direction away from elongated member 102; however, fins 110 may extend outwardly from elongated member 102 in any suitable direction. Each fin 110 may have a substantially rectangular transverse cross-section profile or a cuboid shape, albeit one skilled in the art will recognize that fin 110 may have any suitable shape of transverse cross-sectional profile. Fins 110 may be positioned around the circumference of elongated member 102 in a manner that will enhance cooling or heat transfer to/away from conduit “C”.
As depicted in FIGS. 1-3, cable stand-off 100 may have sets 112 of fins 110 located at different locations along a length of elongated member 102. Each set 112 of fins includes a plurality of fins 110 disposed around the outer circumference of elongated member 102. A person with ordinary skills in the art will understand that cable stand-off 100 may have any number of sets 112 of fins 110 disposed around the circumference of elongated member 102 or a continuous set of fins 110 extending along the entire length of cable stand-off 100.
In one embodiment, cable stand-off 100 may extend along substantially the entire length of conduit “C”. Alternatively, as seen in FIGS. 4 and 5, cable stand-off 100 may be comprised of several sections 100a, 100b, 100c, etc. partially covering a portion of the length of conduit “C”. The configuration of the latter embodiment allows heat to escape from the uncovered sections of cable 106.
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 FIGS. 6-8, an alternative embodiment of a cable stand-off is generally designated as 200. Cable stand-off 200 includes an elongated member 202 having a helical shape and is configured to separate conduit “C” from a user or a patient. In the illustrated embodiment, elongated member 202 has a circular transverse cross-sectional profile; however, elongated member 102 may have any suitable transverse cross-sectional profile.
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 FIGS. 9 and 10, in an alternative embodiment, cable stand-off 200 comprises an elongated member 202 partially surrounding conduit “C”. In this embodiment, elongated member 202 includes a plurality of helical shaped segments 202a surrounding segments of conduit “C”. Each segment 202a of elongated member 202 is joined to an adjacent segment 202a by a bridge 204. Each bridge 204 extends longitudinally between adjacent helical segments 202a. This configuration allows conduit “C” to emit, emanate or radiate heat therefrom between segments 202a. In addition, airflow may convectively cool conduit “C” at locations between segments 202a. 
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 FIGS. 11-13, an alternative embodiment of a cable stand-off is generally designated as 300. Cable stand-off 300 includes an elongated member 302 in the form of a woven or mesh sleeve. As seen in FIGS. 11-13, elongated member 302 extends along at least a substantial length of conduit “C”. Elongated member 302 may be formed of any suitable insulative natural or synthetic fiber, though one skilled in the art will recognize that any suitable insulative material may be utilized. In addition, elongated member 302 may be comprised of a suitable non-flammable, low particulate, and flexible fiber. It is contemplated that the fiber of elongated member 302 should exhibit low thermal conductivity. For example, elongated member 302 may be made of any suitable fiberglass or polymer-based fiber material. These materials may be bi-directional or uni-directional.
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 FIGS. 14 and 15, elongated member 302 of cable stand-off 300 is broken into segments 302a to only cover portions of conduit “C”. The segments of conduit “C”, between segments 302a of elongated body 302, are uncovered and, as such, the heat produced by energy transmission through conduit “C” of an electrosurgical system may escape through these uncovered segments of conduit “C”.
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.

## Claims

1. A cable stand-off, comprising:
an elongated member surrounding at least a portion of a length of at least one energy transmission conduit, at least a portion of the elongated member having a helical shape;
wherein the elongated member is formed of thermally insulative material and includes helical segments of similar diameter longitudinally spaced apart from one another by longitudinally extending bridges, the bridges extending between adjacent helical segments along an outside surface of the at least one energy transmission conduit and at most only partially about the at least one energy transmission conduit.

2. The cable stand-off according to claim 1, wherein the elongated member extends along at least a portion of a length of the conduit.

3. The cable stand-off according to claim 1, wherein the elongated member extends along substantially an entire length of the conduit.

4. A cable stand-off according to claim 1, wherein at least one bridge extends off axis relative to a longitudinal body axis of an adjacent helical section at a point of extension.

5. A cable stand-off according to claim 1, wherein the bridges are configured and dimensioned to permit airflow to the at least one energy transmission conduit between the helical sections.

6. A cable stand-off according to claim 1, wherein each bridge extends from an adjacent helical section in substantially perpendicular manner.

7. A cable stand-off, comprising:
an elongated member surrounding at least a portion of a length of at least one energy transmission conduit, at least a portion of the elongated member having a helical shape;
wherein the elongated member is formed of thermally insulative material and includes helical segments of similar diameter longitudinally spaced apart from one another by longitudinally extending bridges, at least one bridge defining a longitudinal body axis which is substantially parallel to a longitudinal axis of the at least one energy transmission conduit, the longitudinal body axis being disposed at a distance from the longitudinal axis that is less than or equal to a distance from the longitudinal axis defined by a radius of at least one of the helical segments.

8. A cable stand-off, comprising:
an elongated member surrounding at least a portion of a length of at least one energy transmission conduit, at least a portion of the elongated member having a helical shape;
wherein the elongated member is formed of thermally insulative material and includes helical segments of similar diameter longitudinally spaced apart from one another by longitudinally extending bridges, the bridges extending between adjacent helical segments in close proximity to the at least one energy transmission conduit and only partially surrounding the at least one energy transmission conduit.