# Patent

## Title
Cool tip junction

## Abstract

A conduit junction for use with an electrosurgical system includes a body having a lumen defined therein and at least one positioning structure. The lumen is configured to receive to receive at least a portion of a tubular structure. The tubular structure includes at least one of a conductor and a conduit of an electrosurgical system. The positioning structure is disposed in mechanical cooperation with the lumen and is adapted to position at least one of the conductor and the conduit within the body of the conduit junction. The body of the conduit junction may include a first section and a second section pivotably connected to each other. The positioning structure may include at least one rib pocket.

## Background
CROSS-REFERENCE TO RELATED APPLICATIONS
The present application is a divisional of U.S. patent application Ser. No. 11/899,921 filed on Sep. 7, 2007, now U.S. Pat. No. 8,181,995 which is incorporated by reference herein.


BACKGROUND
1. Technical Field
The present disclosure relates generally to methods and apparatuses for thermal treatment of tissue and, more particularly, to a conduit junction for use with an electrosurgical system configured to secure conduits in place in the electrosurgical system.
2. Background of the Related Art
Electrosurgical systems are well known in the art. Some electrosurgical systems employ microwave energy to produce a number of therapeutic effects in 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 conductors, such as, wires, cables, tubing or other suitable energy transmission structure. In addition to the energy transmitting conductors, some electrosurgical systems have conduits adapted to carry cooling fluids to the surgical tip of the electrosurgical system. These conduits transport cooling fluid to the surgical tip of the electrosurgical system to transfer heat between the surgical tip and the fluid.
Ideally, the maximum amount of cooling fluid should reach the surgical tip and, therefore, the conduits should not have leaks. To this end, manufacturers of electrosurgical systems usually test these conduits for leakage. During quality inspection, if a leak is found in the conduits, the entire electrosurgical system is often discarded.
SUMMARY
The present disclosure relates to a conduit junction for use with an electrosurgical system. The conduit junction includes a body having a lumen defined therein and at least one positioning structure. The lumen of the body is configured to receive at least a portion of the tubular structure. The tubular structure includes at least one of a conductor and a conduit. The positioning structure is disposed in mechanical cooperation with the lumen and is adapted to position at least one of the conductor and the conduit within the body of the conduit junction.
The present disclosure also relates to an electrosurgical system. The electrosurgical system includes a surgical device, a tubular structure, and a conduit junction. The tubular structure includes a conduit defined therein and a conductor. The conduit is configured to carry fluid towards the surgical device. The conductor is configured to deliver energy to the surgical device. The conduit junction has at least one positioning structure adapted to position at least one of the conductor and the conduit.
The present disclosure additionally relates to a method of assembling an electrosurgical system. This method includes the steps of providing an electrosurgical system having a first and second sections, and a conduit junction including at least one positioning structure. Further, the method includes the step of connecting the first section and the second section of the electrosurgical system to the conduit junction.



BRIEF DESCRIPTION OF THE DRAWINGS
Embodiments of the presently disclosed electrosurgical system and conduit junction for use therewith are disclosed herein with reference to the drawings, wherein:
FIG. 1 is a perspective view of an electrosurgical system according to an embodiment of the present disclosure;
FIG. 2 is a side elevational view of the electrosurgical system of FIG. 1;
FIG. 3 is a perspective view a conduit junction according to an embodiment of the present disclosure in an open position;
FIG. 4 is a perspective view of the conduit junction of FIG. 3 in a closed position; and
FIG. 5 is a side elevational view of the conduit junction of FIG. 3 in an open position.



DETAILED DESCRIPTION OF THE EMBODIMENTS
Embodiments of the presently disclosed electrosurgical system and conduit junction for use therewith are described in detail with reference to the drawings, in which like reference numerals designate identical or corresponding elements in each of the several views. As used herein and as is traditional, the term “distal” refers to the portion that is farther from the user and the term “proximal” refers to the portion that is closer the user. Also, in the specification and the claims, all singular forms, including “a,” “an,” and “the,” include the plural reference unless the context clearly dictates otherwise. Likewise, all plural forms include the singular reference.
The conduit junction of the present disclosure is intended to be used with an electrosurgical system or any other suitable surgical system. Generally, electrosurgical systems deliver electrosurgical energy to tissue for thermal treatment such as tissue ablation, tissue vaporization and tissue coagulation. For example, radio frequency (RF) energy may be applied to tissue to treat benign prostatic hyperplasia (BPH). The applications of electrosurgical systems, however, are not limited to the treatment of BPH. Surgeons often employ electrosurgical systems in other kinds of surgical procedures such as cardiac ablation, cancer treatment, among others. Some electrosurgical systems are designed for use during minimally invasive procedures.
The present disclosure relates to a conduit junction that interconnects at least two portions of an electrosurgical system. Specifically, the presently disclosed conduit junction operatively couples conduits and conductors of an electrosurgical system. Since the conduit junction joins at least two portions of an electrosurgical system, the conduits and conductors do not need to extend throughout the entire length of the system. The conduits and conductors of the present disclosure can be shorter than the conduits and conductors of typical electrosurgical systems. The shorter length of these conduits allows manufacturers to perform leak testing more efficiently. Also, if a leak or any other manufacturing defect is detected in the electrosurgical system of the present disclosure, it is envisioned that only the flawed portion of the electrosurgical system may be replaced or repaired. The remaining portion of the electrosurgical system can be saved and reused.
Referring initially to FIGS. 1 and 2, an electrosurgical system is generally designated as reference numeral 10. The present disclosure is not limited to any specific kind of electrosurgical system. Rather, electrosurgical system 10 can be a microwave ablation system, an RF system or any other suitable surgical system. In an embodiment, electrosurgical system 10 includes a handle assembly 12, a tubular structure 14, a conduit junction 20, and a surgical device 16. Handle assembly 12 is attached to the proximal end of tubular structure 14. In turn, the distal end of the tubular structure 14 is operatively fixed to surgical device 16. Surgical device 16 can be any suitable surgical apparatus, such as an ablation instrument, a microwave antenna, or an RF probe.
Tubular structure 14 has a lumen or a bore 4 extending therethrough, as seen in FIG. 3. Bore 4 is adapted to receive at least one conductor 17 and a conduit 15. Tubular structure 14 can be made of an electrically and thermally insulative material. As shown in FIGS. 1 and 2, tubular structure 14 includes a first section 14a secured to the handle assembly 12 and a second section 14b fixed to surgical device 16. A conduit junction 20 interconnects first section 14a and second section 14b of tubular structure 14 with each other. In particular, a proximal end 1 of first section 14a is secured to handle assembly 12 and a distal end 2 of first section 14a is attached to conduit junction 20. A proximal end 3 of second section 14b, in turn, is connected to conduit junction 20 and a distal end 5 of second section 14b is secured to surgical device 16.
As seen in FIGS. 1 and 3, an electrosurgical generator 19 supplies energy to electrosurgical system 10 and is in electro-mechanical cooperation with conductor 17. The energy supplied by electro surgical energy generator 19 is carried towards surgical device 16 through conductor 17. Accordingly, conductor 17 is capable of transmitting electrosurgical energy therethrough and may extend from handle assembly 12 to surgical device 16. The present disclosure envisions that conductor 17 can be made of any suitable electrically conductive material. Additionally, it is contemplated that conductor 17 can be formed of wires, cables, or any suitable energy transmitting apparatus. Conductor 17 can include one or more energy transmitting apparatuses. In the embodiment depicted in FIG. 3, for instance, conductor 17 includes three wires 17a, 17b, and 17c. It is also envisioned that conductor 17 includes a first section 13 and a second section 9 in electro-mechanical cooperation with each other.
With reference to FIGS. 3 and 6, conduit junction 20 operatively interconnects first section 13 and second section 9 of conductor 17. In particular, a proximal end 13a of first section 13 is connected to handle assembly 12 and a distal end 13b of first section 13 is positioned within to conduit junction 20. A proximal end 9a of second section 9 is positioned within conduit junction 20 and a distal end 9b of second section 9 is attached to surgical device 16. In one embodiment, connectors 11 electrically connect first section 13 and second section 9 of conductor 17. An electrically insulative material, such as heat shrink, may cover and insulate connectors 11. Although the drawings show three connectors 11, electrosurgical system 10 may include more or fewer connectors 11. The number of connectors 11 may depend on the number of energy transmitting apparatuses of conductor 17.
In addition to conductor 17, bore 4 of tubular structure 14 is configured to receive at least one conduit 15. As seen in FIG. 1, a fluid delivery source 18 supplies cooling fluid to electrosurgical system 10 through conduit 15. Conduit 15 is in fluid communication with fluid delivery source 18 and is configured to carry a cooling fluid towards surgical device 16. The present disclosure contemplates that conduit 15 may be a closed fluid channel. During operation, fluid delivery source 18 supplies cooling fluid to conduit 15, the cooling fluid then flows through conduit 15 towards surgical device 16 and extracts at least part of the heat generated on surgical device 16, and thereafter, the cooling fluid flows away from surgical device 16.
Conduit 15 can include an inflow portion 21 and an outflow portion 23. Inflow portion 21 carries cooling fluid towards surgical device 16 whereas outflow portion 23 carries cooling fluid away from surgical device 16. Inflow portion 21 of conduit 15 is in fluid communication with fluid delivery source 18 and may have a first section 21a and a second section 21b operatively connected to each other. Conduit junction 20 connects the distal end of first section 21a of inflow portion 21 with the proximal end of second section 21b of inflow portion 21. The proximal end of first section 21a is operatively attached to fluid delivery source 18 and the distal end of second section 21b is operatively attached to surgical device 16. In one embodiment, a luer fitting 28 connects first section 21a and second section 21b of inflow portion with one another. Luer fitting 28 can be disposed within a body 22 of conduit junction 20. Although the drawings illustrate luer fitting 28 interconnecting first and second sections 21a, 21b of inflow portion 21, any suitable fitting can be used to operatively couple these two sections 21a, 21b. 
Similarly, outflow portion 23 of conduit 15 may have a first section 23a and a second section 23b in fluid communication with each other. The proximal end of first section 23a of outflow portion 23 is attached to fluid delivery source 18 and the distal end of second section 23b of outflow portion 23 is secured to surgical device 16. Conduit junction 20 operatively couples the distal end of first section 23a with the proximal end of second section 23b of outflow portion 23. Luer fitting 28 disposed within the body 22 of conduit junction 20 is shown interconnecting first section 23a and second section 23b of outflow portion 23. One skilled in the art, however, will recognize that any suitable fitting may be used to interconnect first section 23a and second section 23b of outflow portion 23 and that the fitting may be disposed within conduit junction 20.
The presently disclosed electrosurgical system 10, as previously discussed, includes a conduit junction 20 disposed in mechanical cooperation with tubular structure 14. As seen in FIGS. 3 and 4, conduit junction 20 has a body 22 with a lumen 24 and at least one positioning structure 26. Lumen 24 of body 22 is configured to receive at least a portion of tubular structure 14. In the depicted embodiment, body 22 includes a first section 22a and a second section 22b and has an elongate structure. Body 22, however, can have other suitable structures. First section 22a and second section 22b of body 22 can be pivotably connected to one another and their shapes may be substantially similar. A hinge or any other suitable member may pivotably connect first section 22a and second section 22b of body 22. In addition, first section 22a and second section 22b of body 22 move with respect to each other between a first position and a second position. In the first position, first section 22a and second section 22b allow access to positioning structures 26, as illustrated in FIGS. 3 and 5. On the other hand, when first section 22a and second section 22b of body 22b are placed in the second position, the positioning structures 26 are inaccessible, as shown in FIG. 4.
Body 22 of the conduit junction 20 has at least one positioning structure 26. The embodiment shown in FIGS. 3 and 5 includes three positioning structures 26a, 26b, and 26c. Regardless of the number of positioning structures 26 in body 22, positioning structures 26 are disposed in mechanical cooperation with the lumen 24. Positioning structures 26 are adapted to position at least one of the conductor 17 and the conduit 15 within body 22. In addition to positioning conductor 17 and conduit 15, positioning structures 26 can also secure at least one of conductor 17 and conduit 15 in body 22 of conduit junction 20. Further, positioning structures 26 may be configured to a minimum distance between conduit 15 and conductor 17 to reduce heat transfer therebetween. As shown in FIG. 5, positioning structures 26 can be adapted to maintain a distance X between conductor 17 and outflow portion 23 of conduit 15. Similarly, positioning structure 26 can be designed to maintain a distance Y between the inflow portion 21 and the outflow portion 23 of conduit 15. In one embodiment, distance X is greater than distance Y. An embodiment of the present disclosure includes a conduit junction 20 having two positioning structures 26a, 26b that position and secure inflow portion 21 and outflow portion 23 of conduit 15 within body 22, as shown in FIGS. 3 and 5. An additional positioning structure 26c is shown that positions conductor 17 within body 22. In this embodiment, positioning structures 26a, 26b, 26c maintain a minimum distance between conduit 15 (e.g. inflow portion 21) and conductor 17. Moreover, positioning structures 26a, 26b, 26c can be configured to hold luer fitting 28 or any other suitable fitting to facilitate the connections between first and second sections 21a, 21b of inflow portion 21; first and second sections 23a, 23b of outflow portion 23; and first and second sections 13, 9 of conductor 17.
Positioning structures 26 can further include at least one rib pocket 29. Rib pockets 29 are adapted to hold conduit 15, conductor 17, and/or fitting 28 interconnecting two sections of conduit 15 and/or conductor 17. As illustrated in FIGS. 3 and 4, a first rib pocket 29a can position and secure inflow portion 21 of conduit 15 and another rib pocket 29b may position and secure outflow portion 23 of conduit 15. A separate rib pocket 29c can specifically hold a fitting, such as luer fitting 28, operatively coupling first section 21a and second section 21b of inflow portion 21. In a similar vein, an additional rib pocket 29d can hold a fitting operatively joining first section 23a and second section 23b of outflow portion 23. Alternatively, rib pocket 29 may itself include a fitting interconnecting first section 21a and second section 21b of inflow portion 21 and/or a fitting operatively coupling first section 23a and second section 23b of outflow portion 23.
In operation, conduit junction 20 may be utilized with electrosurgical system 10 or any other suitable surgical system. A method of using conduit junction 20 includes assembling or integrating conduit junction 20 to electrosurgical system 10. To integrate conduit junction 20 and electrosurgical system 10, a user interconnects first section 14a and second section 14b of tubular structure 14. First and second section 14a, 14b of tubular structure 14 can be interconnected by coupling sections of the inflow and outflow portions 21, 23 of conduit 15 as well as a section of conductor 17.
An operator can connect first section 21a and second section 21b of inflow portion 21 of conduit 15 with a fitting (e.g. luer fitting 28). First section 23a and second section 23b of outflow portion 23 of conduit 15 can also be coupled with a fitting. These fitting may then be placed in rib pockets 29 of positioning structures 26. A user can also couple first section 13 and second section 15 of conductor 17 with at least one electrical connector 11. Thereafter, electrical connector 11 can be positioned in rib pocket 29 of positioning structure 26. After placing the fittings and connectors 11 in rib pockets 29, the user may move conduit junction 20 to its second position, as seen in FIG. 4, by moving the second section 22b of body 22 in the direction indicated by arrow “A” in FIG. 3.
Although the present disclosure describes specific embodiments, these embodiments should not be construed as limitations on the present disclosure, but merely exemplifications of the embodiments of the present disclosure. Those skilled in the art will envision many other variations that are within the scope and spirit of the present disclosure as defined by the claims appended hereto.

## Claims

1. An electrosurgical system, comprising:
a surgical device;
a tubular structure having a distal end operatively fixed to the surgical device, the tubular structure including:
a conduit defined therein, the conduit being configured to carry a fluid towards the surgical device; and
a conductor configured to deliver energy to the surgical device; and
a conduit junction including:
at least one positioning structure being adapted to position at least one of the conductor and the conduit within the conduit junction,

wherein the at least one positioning structure includes at least one luer fitting.

2. The electrosurgical system of claim 1, wherein the conduit junction includes a body having a first section and a second section, wherein the first section of the body and the second section of the body are movable with respect to each other between a first position where the at least one positioning structure is accessible and a second position where the at least one positioning structure is inaccessible.

3. The electrosurgical system of claim 1, wherein the at least one positioning structure is configured to secure at least one of the conductor and the conduit.

4. The electrosurgical system of claim 1, wherein the positioning structure includes at least one rib pocket.

5. The electrosurgical system of claim 1, wherein the at least one positioning structure is configured to maintain a minimum distance between the conductor and the conduit.

6. An electrosurgical system, comprising:
a surgical device;
a tubular structure having a distal end operatively fixed to the surgical device, the tubular structure including:
a conduit defined therein. the conduit being configured to carry a fluid towards the surgical device; and
a conductor configured to deliver energy to the surgical device; and
a conduit junction including:
at least one positioning structure being adapted to position at least one of the conductor and the conduit within the conduit junction,


wherein an inflow portion of the conduit is configured to carry fluid towards the surgical device and an outflow portion of the conduit configured to carry fluid away from the surgical device, wherein the inflow portion includes a first section and a second section, and wherein the conduit junction is configured to connect the first section of the inflow portion and the second section of the inflow portion.

7. An electrosurgical system, comprising:
a surgical device;
a tubular structure having a distal end operatively fixed to the surgical device. the tubular structure including:
a conduit defined therein, the conduit being configured to carry a fluid towards the surgical device; and
a conductor configured to deliver energy to the surgical device; and
a conduit junction including:
at least one positioning structure being adapted to position at least one of the conductor and the conduit within the conduit junction,


wherein an inflow portion of the conduit is configured to carry fluid towards the surgical device and an outflow portion of the conduit configured to carry fluid away from the surgical device, wherein a first section of the inflow portion and a second section of the inflow portion are operatively connected by a luer fitting.

8. An electrosurgical system, comprising:
a surgical device;
a tubular structure having a distal end operatively fixed to the surgical device. the tubular structure including:
a conduit defined therein, the conduit being configured to carry a fluid towards the surgical device; and
a conductor configured to deliver energy to the surgical device; and
a conduit junction including:
at least one positioning structure being adapted to position at least one of the conductor and the conduit within the conduit junction,


wherein an inflow portion of the conduit is configured to carry fluid towards the surgical device and an outflow portion of the conduit configured to carry fluid away from the surgical device, wherein the outflow portion includes a first section and a second section, and wherein the conduit junction is configured to connect the first section of the outflow portion and the second section of the outflow portion.

9. The electrosurgical system of claim 8, wherein the first section of the outflow portion and the second section of the outflow portion are operatively connected by a luer fitting.