WO2002071966A1 - Electrosurgical device having a tissue reduction sensor - Google Patents
Electrosurgical device having a tissue reduction sensor Download PDFInfo
- Publication number
- WO2002071966A1 WO2002071966A1 PCT/US2002/007081 US0207081W WO02071966A1 WO 2002071966 A1 WO2002071966 A1 WO 2002071966A1 US 0207081 W US0207081 W US 0207081W WO 02071966 A1 WO02071966 A1 WO 02071966A1
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- WO
- WIPO (PCT)
- Prior art keywords
- tissue
- treated
- clamping member
- electrosurgical device
- electrode
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B18/1442—Probes having pivoting end effectors, e.g. forceps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00017—Electrical control of surgical instruments
- A61B2017/00022—Sensing or detecting at the treatment site
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/03—Automatic limiting or abutting means, e.g. for safety
- A61B2090/033—Abutting means, stops, e.g. abutting on tissue or skin
- A61B2090/034—Abutting means, stops, e.g. abutting on tissue or skin abutting on parts of the device itself
- A61B2090/035—Abutting means, stops, e.g. abutting on tissue or skin abutting on parts of the device itself preventing further rotation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
- A61B2090/061—Measuring instruments not otherwise provided for for measuring dimensions, e.g. length
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
- A61B2090/064—Measuring instruments not otherwise provided for for measuring force, pressure or mechanical tension
- A61B2090/065—Measuring instruments not otherwise provided for for measuring force, pressure or mechanical tension for measuring contact or contact pressure
Definitions
- the present invention relates generally to electrosurgical devices for use in surgical procedures and, more particularly, to an electrosurgical device having a sensor for detecting a change in tissue dimension.
- Electrosurgical devices use electrical energy, most commonly radiofrequency (“RF”) energy, to cut tissue and/or cauterize blood vessels.
- RF radiofrequency
- a voltage gradient is created at the tip of the device, thereby, inducing current flow and related thermal energy generation in the tissue.
- the thermal energy generated is sufficient to cut or shrink the tissue being treated, or cauterize blood vessels.
- Existing electrosurgical devices can cause the temperature of the tissue being treated (e.g., the tissue treatment zone) to rise significantly higher than 100 degrees C, resulting in tissue desiccation, tissue sticking to the electrodes, tissue perforation, char formation and/or smoke generation.
- Peak tissue temperatures as a result of RF treatment can be as high as 350 degrees C, and such high temperatures may be transmitted to adjacent tissue via thermal diffusion. Undesirable results of such transmission to adjacent tissue include unintended thermal damage to the tissue.
- electrosurgical devices have been developed that simultaneously introduce a fluid (e.g., an electrolytic solution with RF applications) to the tissue treatment zone, thereby, distributing the thermal energy at the tissue treatment zone, and providing cooling as well.
- the surgeon or operator of the electrosurgical device it is often desirable to allow the surgeon or operator of the electrosurgical device to control the dimensional changes of the tissue being treated. Typically, this is accomplished by monitoring the temperature at or near the tissue treatment zone. With some electrosurgical devices, the surgeon or operator can manually control the thermal energy being introduced to the tissue treatment zone. Alternatively, other electrosurgical devices can be configured to operate with a feedback control system to automatically control the thermal energy introduced to the tissue being treated. In either case, shortcomings with existing electrosurgical devices limit their effectiveness in controlling the dimensional changes of the tissue being treated. In particular, existing electrosurgical devices monitor the temperature at or near the tissue treatment zone using a temperature sensor, such as, a thermocouple, thermistor, phosphor-coated optical fibers, or some other temperature sensor.
- a temperature sensor such as, a thermocouple, thermistor, phosphor-coated optical fibers, or some other temperature sensor.
- the temperature read by the temperature sensor including the temperature of the tissue being treated as well as any fluid being simultaneously infused at the tissue treatment zone. Furthermore, the temperature being read by the temperature sensor varies as the surgeon or operator moves the electrosurgical device into or out of the tissue treatment zone. As a result of these and other factors, it is often difficult to precisely achieve the desired dimensional change (e.g., the amount of shrinkage) of the tissue being treated. Improvements in electrosurgical devices used in surgical procedures are, therefore, sought.
- the present disclosure relates to an electrosurgical device for use in surgical procedures. More particularly, the present disclosure relates to an electrosurgical device having a sensor for detecting a change in tissue dimension, such as, tissue expansion or contraction.
- the electrosurgical device comprises a main body having a proximal end and a distal end.
- a heat delivery modality is situated and arranged at the distal end of the main body.
- a sensor arrangement is also situated and arranged at the distal end of the main body.
- the heat delivery modality provides thermal energy to a tissue being treated while the sensor arrangement is configured to engage and detect shrinkage of the tissue being treated.
- the heat delivery modality can be configured to provide a continuous flow of electrically conductive fluid to the tissue being treated while thermal energy is introduced.
- the sensor arrangement can comprise at least one contact sensor situated and arranged at the distal end of the main body.
- the at least one contact sensor is constructed and arranged to engage and detect the shrinkage of the tissue being treated.
- the sensor arrangement can comprise first and second clamping members that are situated astride the main body.
- the first clamping member can include a first end pivotably connected at the main body and a second end opposite the first end.
- the second clamping member can include a first end pivotably connected at the main body and a second end opposite the first end.
- Each of the second ends of the first and second clamping members can be constructed and arranged to engage and detect shrinkage of the tissue being treated such that the first and second clamping members rotate inwardly with respect to one another.
- first clamping member can include a first mechanical stop for limiting the rotation of the first clamping member.
- second clamping member can include a second mechanical stop for limiting the rotation of the second clamping member. Accordingly, the first and second mechanical stops can be configured to limit the rotation of the first and second clamping members when the tissue being treated achieves a predetermined shrinkage level.
- the first clamping member can include a first jaw and a second jaw at the second end of the first clamping member.
- the first and second jaws of the first clamping member can be selectively adjustable to grasp the tissue being treated.
- the second clamping member can include a first jaw and a second jaw at the second end of the second clamping member.
- the first and second jaws of the second clamping member can be selectively adjustable to grasp the tissue being treated.
- each of the first and second jaws of the first clamping member can include a textured inner surface for resistively contacting the tissue being treated.
- Each of the first and second jaws of the second clamping member can also include a textured inner surface for resistively contacting the tissue being treated.
- each of the first and second jaws of the first clamping member can include a solution delivery channel for delivery of a conductive solution to the tissue being treated.
- each of the first and second jaws of the second clamping member can include a solution delivery channel for delivery of a conductive solution to the tissue being treated.
- the heat delivery modality can include a first electrode arrangement operable with the first clamping member. The first electrode arrangement can be coupled to a source of radio frequency energy. Similarly, the heat delivery modality can include a second electrode arrangement operable with the second clamping member. The second electrode arrangement can be coupled to the source of radio frequency energy.
- the first electrode arrangement can include at least one wet electrode that is coupled to the source of radio frequency energy while the second electrode arrangement can include at least one wet electrode that is coupled to the source of radio frequency energy.
- the electrosurgical device can include a forceps extending from the distal end of the main body between the first and second clamping members.
- the forceps can include a first arm and a second arm that is selectively adjustable to slidably receive the tissue being treated.
- the heat delivery modality can include a first electrode disposed at the first arm of the forceps and a second electrode disposed at the second arm of the forceps.
- both the first and second electrodes can be wet electrodes.
- first arm of the forceps can include a first solution delivery channel for delivery of a conductive solution to the tissue being treated.
- the second arm of the forceps can include a second solution delivery channel for delivery of a conductive solution to the tissue being treated.
- the sensor arrangement can be configured to provide input to the heat delivery modality such that the thermal energy being provided by the heat delivery modality is varied according to the shrinkage of the tissue being treated. Alternatively, the thermal energy provided by the heat delivery modality can be minimized when the tissue being treated achieves a pre-determined shrinkage level. Furthermore, the sensor arrangement can be operably connected to a displacement measurement device for measuring the change in shrinkage of the tissue being treated, such as, a linear potentiometer, an optical sensor, a spring/force sensor, or other measurement device.
- the disclosure relates to an electrosurgical device comprising a main body having a proximal end and a distal end, a heat delivery modality situated and arranged at the distal end of the main body, and a sensor arrangement situated and arranged at the distal end of the main body.
- the heat delivery modality is capable of providing thermal energy to a tissue being treated as well as a continuous flow of electrically conductive fluid to the tissue being treated while thermal energy is introduced.
- the sensor arrangement is configured to engage and detect shrinkage of the tissue being treated and can comprise first and second clamping members that are situated astride the main body.
- the first clamping member can include a first end pivotably connected at the main body and a second end opposite the first end.
- the second clamping member can include a first end pivotably connected at the main body and a second end opposite the first end.
- Each of the second ends of the first and second clamping members are preferably constructed and arranged to engage and detect shrinkage of the tissue being treated such that the first and second clamping members rotate inwardly with respect to one another.
- the first clamping member can include a first jaw and a second jaw at the second end of the first clamping member.
- the first and second jaws of the first clamping member can be selectively adjustable to grasp the tissue being treated.
- the second clamping member can include a first jaw and a second jaw at the second end of the second clamping member. The first and second jaws of the second clamping member can be selectively adjustable to grasp the tissue being treated.
- each of the first and second jaws of the first clamping member can include a textured inner surface for resistively contacting the tissue being treated.
- Each of the first and second jaws of the second clamping member can also include a textured inner surface for resistively contacting the tissue being treated.
- each of the first and second jaws of the first clamping member can include a solution delivery channel for delivery of a conductive solution to the tissue being treated.
- each of the first and second jaws of the second clamping member can include a solution delivery channel for delivery of a conductive solution to the tissue being treated.
- the heat delivery modality can include a first electrode arrangement operable with the first clamping member and coupled to a source of radio frequency energy.
- the heat delivery modality can include a second electrode arrangement operable with the second clamping member and coupled to the source of radio frequency energy.
- the first electrode arrangement can include at least one wet electrode that is coupled to the source of radio frequency energy.
- the second electrode arrangement can include at least one wet electrode that is coupled to the source of radio frequency energy.
- the electrosurgical device can include a forceps extending from the distal end of the main body between the first and second clamping members. The forceps can include a first arm and a second arm that is selectively adjustable to slidably receive the tissue being treated.
- the heat delivery modality can include a first wet electrode disposed at the first arm of the forceps and coupled to a source of radio frequency energy.
- the heat delivery modality can include a second wet electrode disposed at the second arm of the forceps and coupled to a source of radio frequency energy.
- the first arm of the forceps can include a first solution delivery channel for delivery of a conductive solution to the tissue being treated.
- the second arm of the forceps can include a second solution delivery channel for delivery of a conductive solution to the tissue being treated.
- the sensor arrangement can be configured to provide input to the heat delivery modality such that the thermal energy being provided by the heat delivery modality is varied according to the shrinkage of the tissue being treated.
- the thermal energy provided by the heat delivery modality can be minimized when the tissue being treated achieves a pre-determined shrinkage level.
- the sensor arrangement can be operably connected to a displacement measurement device for measuring the change in shrinkage of the tissue being treated, such as, a linear potentiometer, an optical sensor, a spring/force sensor, or other measurement device.
- FIG. 1 is a high-level diagram illustrating one possible embodiment of an electrosurgical device having a sensor for detecting a change in tissue dimension in accordance with the present disclosure connected to a power source and an electronic controller;
- FIG. 2 is an enlarged, top view illustrating the electrosurgical device of FIG. 1 having a sensor for detecting a change in tissue dimension;
- FIG. 3 is an enlarged, side section view illustrating the electrosurgical device of FIG. 2 having a sensor for detecting a change in tissue dimension;
- FIG. 4 is an enlarged, a top view illustrating the electrosurgical device of FIG. 2 having a tissue positioned within the device;
- FIG. 5 is an enlarged, side section view illustrating the electrosurgical device of FIG. 4;
- FIG. 6 is an enlarged, top view illustrating a second possible embodiment of the electrosurgical device of FIG. 1;
- FIG. 7 is an enlarged, side section view illustrating the electrosurgical device of FIG. 6 having a sensor for detecting a change in tissue dimension
- FIG. 8 is an enlarged, a top view illustrating the electrosurgical device of FIG. 6 having a tissue positioned within the device;
- FIG. 9 is an enlarged, side section view illustrating the electrosurgical device of FIG. 8.
- FIG. 10 illustrates an alternative configuration of the electrosurgical device of FIG. 1 for measuring change in tissue dimension in accordance with the present disclosure.
- the present disclosure has particularized applicability to electrosurgical devices having a tissue reduction or shrinkage sensor.
- the medical device of the present disclosure may be implemented during any surgical procedure where thermal energy is being used to contract and/or expand collagen and it is desirous to precisely measure and/or control the change in dimension of the tissue being treated.
- change in dimension it is generally meant that the electrosurgical device of the present disclosure is able to measure and/or control the shortening, lengthening, widening, thinning, or other similar dimensional variations, of the tissue being treated.
- the electrosurgical device 100 generally includes a main body 102 having a proximal end 106 and a distal end 108.
- proximal end is generally meant to refer to the portion of the electrosurgical device 100 that is held in the operator's hand during use.
- distal end is generally meant to refer to the portion of the electrosurgical device 100 at or near a location that contacts the patient.
- the main body 102 can include a handle portion 104 at or near its proximal end 106 and an end effector region E at or near its distal end 108.
- the handle portion 104 depends downwardly along the main body portion 102 away from the end effector region E to provide a suitable area for gripping or handling the electrosurgical device 100 during use.
- the electrosurgical device 100 is connected to a power source 118 via a pair of conductors 120.
- the power source 118 supplies energy to the electrosurgical device 100.
- the electrosurgical device 100 can be configured to provide feedback to an electronic controller 116 that is configured to modulate the energy supplied by the power source 118.
- the end effector region E generally includes an arrangement for delivering thermal energy to the tissue (not shown) being treated.
- the arrangement for delivering thermal energy can comprise a heat delivery modality 110 capable heating the tissue being treated, thereby, causing the tissue to contract.
- the arrangement for delivering thermal energy can comprise a device capable of cooling the tissue being treated, thereby, causing the tissue to expand.
- the heat delivery modality 110 generally can include any mechanism capable of delivering thermal energy to the tissue being treated, such as, RF energy, microwave energy, coherent (e.g., laser) and incoherent light energy, direct thermal transfer, electrical resistive heating, as well as other similar forms of energy.
- the heat delivery modality 118 can be connected to any suitable energy source capable of introducing thermal energy to the tissue being treated, thereby, causing the tissue to contract.
- the end effector region E also includes a sensor arrangement 112.
- the sensor arrangement 112 generally can include any device capable of engaging and detecting a change in dimension, such as, shrinkage or expansion, of the tissue (not shown) being treated as thermal energy is introduced.
- the sensor arrangement 112 can include at least one contact sensor situated and arranged at the distal end 108 of the main body 102. While many embodiments of the sensor arrangement 112 are contemplated, the sensor arrangement illustrated in FIG. 1, generally includes a first contact sensor 114a and a second contact sensor 114b, such as, clamping members, needles, or other devices, configured to grasp or embed within the tissue being treated.
- One or both of the contact sensors 114a, 114b can be pivotably attached to the main body 102 of the electrosurgical device 100 such that the contact sensors 114a, 114b move relative to the change in dimension of the tissue being treated.
- the contact sensors 114a, 114b move relative to the shrinkage of the tissue being treated.
- the sensor arrangement 112 is able to detect the shrinkage of the tissue being treated, thereby, allowing the surgeon or operator to precisely shrink or contract the tissue being treated.
- the surgeon or operator can precisely shrink or contract the tissue by manually adjusting the power source 118 when the tissue shrinks to a desired level.
- the electrosurgical device 100 can be configured to provide a feedback control signal to the electronic controller 116 that is configured to modulate the energy supplied by the power source 118 such that the electrosurgical device 100 can automatically shrink or contract the tissue being treated to a predetermined level.
- the predetermined level can be established according to preset criteria, such as, shrinkage percentage or total tissue length reduction. Specific embodiments of the heat delivery modality 110 and the sensor arrangement 112 will be discussed in greater detail below.
- the end effector region E can include a forceps 130 for receiving the target tissue (not shown) to be treated.
- the forceps 130 includes a first arm 130a and a second arm 130b.
- the first and second arms 130a, 130b are spaced apart a distance D F to define a passageway therebetween.
- the forceps 130 slidably receive the target tissue to be treated within the passageway defined between the first and second arms 130a, 130b.
- the forceps 130 allow the tissue being treated to shrink as thermal energy is introduced to the treatment zone.
- the forceps 130 define a heat delivery modality 110 for providing thermal energy to the tissue (not shown) being treated. While many embodiments of the heat delivery modality 110 are contemplated, in the illustrated embodiment, the heat delivery modality 110 defined by the forceps 130 includes an electrode arrangement 131 for providing thermal energy to the tissue being treated. In particular, as shown in FIG.
- the first arm 130a of the forceps 130 can include a first electrode 132
- the second arm 130b can include a second electrode 134 having a polarity opposite the first electrode 132.
- the electrode arrangement 131 illustrated in FIG. 3 is a bipolar configuration. However, one skilled in the art will readily appreciate that the electrosurgical device 100 of the present disclosure can be implemented using a monopolar electrode arrangement.
- the first and second electrodes 132, 134 can be selectively energized to provide thermal energy to the tissue being treated.
- the thermal energy supplied to the tissue being treated is produced as a result of a voltage gradient created by a RF energy power source 118 (FIG. 1).
- the thermal energy supplied to the tissue being treated can be provided by any suitable energy source sufficient to allow the tissue being treated to shrink or contract.
- the energy source 118 connected to the heat delivery modality 131 can be microwave energy, coherent (e.g., laser) or incoherent light energy, direct thermal transfer, electrical resistive heating, as well as other similar forms or sources of energy.
- the electrode arrangement 131 discussed above is a wet electrode arrangement and is used in conjunction with a conductive fluid (e.g., an electrolytic solution).
- a conductive fluid e.g., an electrolytic solution.
- the use of a conductive fluid in connection with the electrode arrangement 131 allows the thermal energy to be distributed equally, thereby, minimizing hot spots within the tissue being treated.
- the first arm 130a of the forceps 130 (FIG. 2) is provided with a solution delivery channel 138.
- the second arm 130b is provided with a solution delivery channel 139.
- the solution delivery channels 138, 139 provide a path for fluid communication between a fluid source (not shown) and the forceps 130.
- the solution delivery channel 138 provides a path for fluid communication between a fluid source and the first arm 130a and the solution delivery channel 139 provides a path for fluid communication between a fluid source and the second arm 130b.
- Fluid can flow from the solution delivery channel 138 through small holes (not shown) in the first electrode 132 and into a region 132' located between the first electrode 132 and the tissue (not shown).
- fluid can flow from the solution delivery channel 139 through small holes (not shown) in the second electrode 134 and into a region 134' located between the second electrode 134 and the tissue.
- the electrosurgical device 100 can introduce a conductive fluid, such as, a saline solution or other similar electrolytic solution, at the electrode/tissue interface to minimize the amount of tissue damage, char formation, smoke generation or other similar damage to the tissue being treated.
- a conductive fluid such as, a saline solution or other similar electrolytic solution
- the end effector region E also includes a sensor arrangement 112 configured to engage and detect a change in dimension of the tissue being treated.
- the sensor arrangement 112 can be used to measure the shrinkage or contraction of the tissue being treated.
- the sensor arrangement 112 generally includes at least one contact sensor situated and arranged at the distal end 108 of the main body 102.
- Exemplary contact sensors capable of engaging and detecting shrinkage of the tissue being treated include, but are not limited to, clamping members, needles, or other devices that can grasp or embed within the tissue being treated. While many embodiments of the sensor arrangement 112 are contemplated, in the illustrated embodiment, the sensor arrangement 112 includes a first clamp 140 and a second clamp 160 situated and arranged astride the forceps 130. By “astride,” it is generally meant that the forceps 130 is situated and arranged between the first and second clamps 140, 160. As shown in FIG. 3, the first clamp 140 can comprise first and second symmetrical jaw members 140a, 140b. Each of the jaw members 140a, 140b include a lower arm member 142 (FIG.
- the first and second symmetrical jaw members 140a, 140b also include a proximal end portion 148 (FIG. 2) and a distal end portion 150 (FIG. 2).
- proximal end portion is generally meant to refer to the portion of each of the first and second jaw members 140a, 140b at or near their point of attachment to the main body 102.
- distal end portion is generally meant to refer to the portion of each of the first and second jaw members 140a, 140b at or near a location furthest from their point of attachment to the main body 102.
- the second clamp 160 comprises first and second symmetrical jaw members 160a, 160b.
- Each of the jaw members 160a, 160b include a lower arm member 162 (FIG. 2) extending away from the main body portion 102 of the device 100 and an upper flange member 164 (FIG. 2).
- an elbow or shoulder 166 (FIG. 2) is defined by the intersection of the lower arm member 162 and the upper flange 164.
- Each of the jaw members 160a, 160b comprising the second clamp 160 also include a proximal end portion 168 (FIG. 2) and a distal end portion 170 (FIG. 2).
- proximal end portion is generally meant to refer to the portion of each of the first and second jaw members 160a, 160b at or near their point of attachment to the main body 102.
- distal end portion is generally meant to refer to the portion of each of the jaw members 160a, 160b at or near a location furthest from their point of attachment to the main body 102.
- first and second symmetrical jaw members 140a, 140b comprising the first clamp 140 are spaced apart a distance D c to define a passageway for receiving the tissue being treated.
- the distance D £ can be selectively adjusted, thereby, increasing or decreasing the compressive forces being applied to the tissue being treated.
- the first and second jaw members 140a, 140b can include inner surfaces 141a, 141b, respectively, that resistively contact the tissue being treated.
- resistively contact it is generally meant that the inner surfaces 141a, 141b are textured such that the first clamp 140 can maintain a grasp on the tissue being treated.
- the inner surfaces 141a, 141b can include serrations, grooves, or any other surface roughness that increase the friction between the first clamp 140 and the tissue being treated.
- the first and second symmetrical jaw members 160a, 160b comprising the second clamp 160 are spaced apart a distance D c to define a passageway for receiving the tissue being treated.
- the distance D c can be selectively adjusted to increase or decrease the compressive forces being applied to the tissue being treated.
- the first and second jaw members 160a, 160b comprising the second clamp 160 can include inner surfaces 161a, 161b that resistively contact the tissue being treated.
- a tissue 180 such as, a tendon or ligament is shown positioned between the forceps 130 and the first and second clamps 140, 160 of the electrosurgical device 100. More particularly, the tissue 180 is shown positioned between the first and second arms 130a, 130b of the forceps
- the tissue 180 is shown positioned between the first and second jaws 140a, 140b of the first clamp 140 and the first and second jaws 160a, 160b of the second clamp 160.
- the operator of the electrosurgical device 100 can selectively energize the heat delivery modality 110 to provide thermal energy to the tissue treatment zone.
- the operator of the electrosurgical device 100 can selectively energize the electrode arrangement 131 (e.g., the first and second electrodes 132, 134) to induce an electric current through the tissue 180 being treated or, more particularly, the treatment zone.
- the phrase "treatment zone" generally refers to the portion or area of the tissue 180 located adjacent to and/or substantially between the first and second arms 130a, 130b of the forceps 130.
- the thermal energy passes through the treatment zone as shown by the dotted lines in FIG. 5.
- the thermal energy causes the tissue 180 within the treatment zone to contract or shrink.
- Existing electrosurgical devices monitor the temperature at or near the treatment zone to allow the surgeon to control the thermal energy introduced to the tissue treatment zone.
- the electrosurgical device 100 of the present disclosure allows the operator to precisely control the thermal energy being introduced to the tissue treatment zone by monitoring the shrinkage of the tissue 180 being treated. Accordingly, the shrinkage of the tissue 180 being treated can be more precisely controlled.
- the sensor arrangement 112 is configured to engage or contact the tissue 180, thereby, sensing or detecting the shrinkage or contraction of the tissue 180 as thermal energy is introduced to the tissue treatment zone.
- the first and second clamping members 140, 160 are shown in engagement with the tissue 180 outside of the tissue treatment zone.
- the first clamp 140 is preferably pivotably connected to the main body 102 at or near a pivot position 152.
- the first clamp 140 is able to rotate about the pivot position 152 such that the upper flange 144 (FIG. 2) moves inwardly towards the forceps 130.
- inwardly it is generally meant that the first clamp 140 moves leftward and towards the forceps 130 such that the lateral distance D L (FIG.
- the second clamp 160 is preferably pivotably connected to the main body 102 at or near a pivot position 172. As a result, the second clamp 160 is able to rotate about the pivot position 172 such that the upper flange 164 moves inwardly towards the forceps 130.
- inwardly it is generally meant that in the orientation shown in FIG. 2, the second clamp 160 moves rightward and towards the forceps 130 such that the lateral distance D L (FIG. 2) between the second clamp 160 and the forceps 130 is reduced.
- first and second clamps 140, 160 are pivotably connected to the main body 102
- first and second clamps 140, 160 can be slidably connected to the main body 102 so that they are able to slide back and forth relative to the expansion and/or contraction of the tissue 180 being treated.
- the electrosurgical device 100 is able to detect a change in dimension of the tissue 180 being treated as thermal energy is introduced to the treatment zone.
- the electrosurgical device 100 is able to detect the shrinkage or contraction of the tissue 180 being treated as thermal energy is introduced to the treatment zone.
- the electrosurgical device 100 is able to detect the recovery or expansion of the tissue 180 being treated as the thermal energy (e.g., heat) is removed from the treatment zone.
- the electrosurgical device 100 also can include a displacement measurement device 174 for measuring the change in dimension of the tissue 180, for example, the shrinkage or contraction of the tissue 180 being treated.
- the first and second clamps 140, 160 are coupled to a displacement measurement device 174 that measures the angular or rotational displacement of the first and second clamps 140, 160 as thermal energy is introduced to the treatment zone.
- the first and second clamps 140, 160 can be coupled to a linear potentiometer, optical sensor, spring/force sensor, or other similar displacement measurement device for measuring the angular or rotation displacement of the first and second clamps 140, 160.
- the amount of change in the dimension of the tissue 180 being treated can be determined by calculating the displacement of each of the contact sensors used to engage the tissue 180.
- the amount of shrinkage in the tissue 180 is determined by calculating the angular displacement of the first and second clamps 140, 160.
- the displacement measurement device 174 can provide a control signal to the electronic control unit 116 (FIG. 1) to reduce or minimize the amount of thermal energy being supplied to the treatment zone by regulating the power source 118 (FIG. 1).
- the first and second clamps 140, 160 can include a mechanical stop (not shown) to prevent shrinkage of the tissue beyond a pre-determined amount or percentage.
- the electrosurgical device 200 generally includes a main body 202 having a proximal end 206 and a distal end 208.
- proximal end is generally meant to refer to the portion of the electrosurgical device 200 that is held in the operator's hand during use.
- distal end is generally meant to refer to the portion of the electrosurgical device 200 at or near a location that contacts the patient.
- the main body 202 can include a handle portion 204 at or near its proximal end 206 and an end effector region E' at or near its distal end 208.
- the handle portion 204 depends downwardly along the main body portion 202 away from the end effector region E' to provide a suitable area for gripping or handling the electrosurgical device 200 during use.
- the handle portion 204 extends below the end effector region E'.
- the end effector region E' includes a sensor arrangement 212 that is configured to engage and detect a change in dimension of the tissue being treated.
- the sensor arrangement 212 generally includes at least one contact sensor situated and arranged at the distal end 208 of the main body 202.
- Exemplary contact sensors capable of engaging and detecting a change in dimension of the tissue being treated include, but are not limited to, clamping members, needles, or other devices that can grasp or embed within the tissue being treated. While many embodiments of the sensor arrangement 212 are contemplated, in the illustrated embodiment, the sensor arrangement 212 includes a first clamp 240 and a second clamp 260 situated and arranged astride the main body 202.
- the first clamp 240 can comprise first and second symmetrical jaw members 240a, 240b.
- Each of the jaw members 240a, 240b include a lower arm member 242 (FIG. 6) extending away from the main body portion 202 of the device 200 and an upper flange member 244 (FIG. 6).
- an elbow or shoulder 246 (FIG. 6) is defined by the intersection of the lower arm member 242 and the upper flange 244.
- the first and second symmetrical jaw members 240a, 240b also include a proximal end portion 248 (FIG. 6) and a distal end portion 250 (FIG. 6).
- proximal end portion is generally meant to refer to the portion of each of the first and second jaw members 240a, 240b at or near their point of attachment to the main body 202.
- the phrase "proximal end portion" is generally meant to refer to the portion of each of the first and second jaw members 240a, 240b at or near their point of attachment to the
- distal end portion is generally meant to refer to the portion of each of the first and second jaw members 240a, 240b at or near a location furthest from their point of attachment to the main body 202.
- the second clamp 260 can comprise first and second symmetrical jaw members 260a, 260b.
- Each of the jaw members 260a, 260b include a lower arm member 262 (FIG. 6) extending away from the main body portion 202 of the device 200 and an upper flange member 264 (FIG. 6).
- an elbow or shoulder 266 (FIG. 6) is defined by the intersection of the lower arm member 262 and the upper flange 264.
- Each of the jaw members 260a, 260b comprising the second clamp 260 also include a proximal end portion 268
- proximal end portion is generally meant to refer to the portion of the second clamp 260 at or near it point of attachment to the main body 202.
- distal end portion is generally meant to refer to the portion of each of the jaw members 260a, 260b at or near a location furthest from its point of attachment to the main body 202.
- the first and second symmetrical jaw members 240a, 240b comprising the first clamp 240 are spaced apart a distance D c ' to define a passageway for receiving the tissue being treated.
- the distance D c ' can be selectively adjusted, thereby, increasing or decreasing the compressive forces being applied to the tissue being treated.
- the first and second jaw members 240a, 240b can include inner surfaces 241a, 241b that resistively contact the tissue being treated.
- resistively contact it is generally meant that the inner surfaces 241a, 241b are textured such that the first clamp 240 maintains a grasp on the tissue being treated.
- the inner surfaces 241a, 241b can include serrations, grooves, or any other similar surface roughness that increase the friction between the first clamp 240 and the tissue being treated.
- first and second symmetrical jaw members 260a, 260b comprising the second clamp 260 are spaced apart a distance D c ' to define a passageway for receiving the tissue being treated.
- the distance D c ' can be selectively adjusted to increase or decrease the compressive forces being applied to the tissue being treated.
- the first and second jaw members 260a, 260b comprising the second clamp 260 can include inner surfaces 261a, 261b that resistively contact the tissue being treated.
- resistively contact it is generally meant that the inner surfaces 261a, 261b are textured such that the second clamp 260 maintains a grasp on the tissue being treated.
- the inner surfaces 261a, 261b can include serrations, grooves, or any other surface roughness that increase the friction between the second clamp 260 and the tissue being treated.
- the end effector region E' includes a heat delivery modality 210 for providing thermal energy to the tissue being treated. While many embodiments of the heat delivery modality 210 are contemplated, in the illustrated embodiment, the heat delivery modality 210 includes an electrode arrangement for providing thermal energy to the tissue being treated. In particular, as shown in FIG. 7, the heat delivery modality 210 can include a first electrode arrangement 231a operable with the first clamp 240 and a second electrode arrangement 231b operable with the second clamp 260.
- the first electrode arrangement 231a includes a first electrode 232 at the first jaw member 240a of the first clamp 240 and a second electrode 233 at the second jaw member 240b.
- the second electrode arrangement 231b includes a first electrode 234 at the first jaw member 260a of the second clamp 260 and a second electrode 235 at the second jaw member 260b.
- the first and second electrodes 232, 233 at the first clamp 240 and the first and second electrodes 234, 235 at the second clamp 260 can be selectively energized to provide electrical energy to the tissue being treated.
- the thermal energy provided to the tissue being treated is RF energy.
- the first and second jaw members 240a, 240b of the first clamp 240 is preferably provided with a solution delivery channel.
- a first solution delivery channel 236 is provided within the first jaw member 240a and a second solution delivery channel 237 is provided within the second jaw member 240b.
- the solution delivery channels 236, 237 provide a path for fluid communication between a fluid source (not shown) and the first clamp 240.
- the solution delivery channel 236 provides a path for fluid communication between a fluid source and the first jaw member 240a and the solution delivery channel 237 provides a path for fluid communication between a fluid source and the second jaw member 240b.
- Fluid can flow from the solution delivery channel 236 through small holes (not shown) in the first electrode 232 (at the first clamp 240) and into a region 232' located between the first electrode 232 and the tissue (not shown).
- fluid can flow from the solution delivery channel 237 through small holes (not shown) in the second electrode 233 (at the first clamp 240) and into a region 233' located between the second electrode 233 and the tissue.
- first and second jaw members 260a, 260b of the second clamp 260 is preferably provided with a solution delivery channel.
- a first solution delivery channel 238 is provided within the first jaw member 260a and a second solution delivery channel 239 is provided within the second jaw member 260b.
- the solution delivery channels 238, 239 provide a path for fluid communication between a fluid source (not shown) and the second clamp 260.
- the first solution delivery channel 238 provides a path for fluid communication between a fluid source and the first jaw member 260a
- the second solution delivery channel 239 provides a path for fluid communication between a fluid source and the second jaw member 260b.
- Fluid can flow from the, solution delivery channel 238 through small holes (not shown) in the first electrode 234 (at the second clamp 260) and into a region 234' located between the first electrode 234 and the tissue (not shown).
- fluid can flow from the solution delivery channel 239 through small holes (not shown) in the second electrode 235 (at the second clamp 260) and into a region 235' located between the second electrode 233 and the tissue.
- the electrosurgical device 200 of the present disclosure is able to introduce a conductive fluid, such as, a saline solution or other similar electrolytic solution, at the electrode/tissue interface to minimize the amount of tissue damage, char formation, smoke generation or other similar damage to the tissue being treated.
- a tissue 280 such as, a tendon or ligament is shown positioned between the first and second clamps 240, 260 of the electrosurgical device 200. More particularly, the tissue 280 is shown positioned between the first and second jaws 240a, 240b of the first clamp 240 and the first and second jaws 260a, 260b of the second clamp 260.
- the operator of the electrosurgical device 200 can selectively energize the first and second electrodes 232, 233 situated at the first clamp 240 and the first and second electrode 234, 235 situated at the second clamp 260 to provide thermal energy to the tissue 280 being treated or, more particularly, the treatment zone.
- treatment zone generally refers to the portion or area of the tissue 280 located adjacent to and/or substantially between the first and second clamps 240, 260.
- thermal energy passes through the treatment zone as shown by the dashed lines in FIG. 9.
- the thermal energy causes the tissue 280 within the treatment zone to contract or shrink.
- the electrosurgical device 200 allows the operator to precisely control the thermal energy being introduced to the tissue treatment zone by monitoring the shrinkage of the tissue 280 being treated. Accordingly, the shrinkage of the tissue 280 can be more precisely controlled.
- the sensor arrangement 212 is configured to engage or contact the tissue 280, thereby, sensing or detecting the shrinkage or contraction of the tissue 280 as thermal energy is introduced to the treatment zone.
- the first and second clamping members 240, 260 are shown in engagement with the tissue 280.
- the first clamp 240 is preferably pivotably connected to the main body 202 at or near a pivot position 252.
- the first clamp 240 is able to rotate about the pivot 252 such that the upper flange 244 (FIG. 6) moves inwardly towards a reference axis A- A extending upwards from the main body 202 as shown in FIG. 6.
- inwardly it is generally meant that the first clamp 240 moves leftward and towards the reference axis A-A such that the lateral distance D' L between the first clamp 240 and the reference axis A-A is reduced.
- the second clamp 260 is preferably pivotably connected to the main body 202 at or near a pivot position 272.
- the second clamp 260 is able to rotate about the pivot 272 such that the upper flange 264 moves inwardly towards the reference axis A-A.
- inwardly it is generally meant that in the orientation shown in FIG. 5, the second clamp 260 moves rightward and towards the reference axis A-A such that the lateral distance D' L between the second clamp 260 and the reference axis is reduced.
- the electrosurgical device 200 is able to detect a change in dimension of the tissue 280 being treated as thermal energy is introduced to the treatment zone.
- the electrosurgical device 200 is able to detect the shrinkage or contraction of the tissue 280 being treated as thermal energy is introduced to the treatment zone.
- the electrosurgical device 200 is able to detect the recovery or expansion of the tissue 280 being treated as the thermal energy (e.g., heat) is removed from the treatment zone.
- the electrosurgical device 200 also can include a displacement measurement device 274 for measuring the shrinkage or contraction of the tissue 280 being treated.
- the first and second clamps 240, 260 are coupled to a displacement measurement device 274 that measures the angular or rotational displacement of the first and second clamps 240, 260 as thermal energy is introduced to the treatment zone.
- the first and second clamps 240, 260 can be coupled to a linear potentiometer, optical sensor, spring/force sensor, or other similar sensing device for measuring the angular or rotation displacement of the first and second clamps 240, 260.
- the amount of shrinkage or contraction in the tissue 280 can be determined by calculating the displacement of each contact sensors used to engage and detect shrinkage of the tissue 280. In the illustrated embodiment, the amount of shrinkage in the tissue 280 is determined by calculating the angular displacement of the first and second clamps 240, 260. Once the desired shrinkage of the tissue 280 has been achieved, the displacement measurement device 274 can provide a control signal to the electronic control unit 116 (FIG. 1) to reduce or minimize the amount of thermal energy being supplied to treatment zone by regulating the power source 118 (FIG. 1). Alternatively, the first and second clamps 240, 260 can include a mechanical stop (not shown) to prevent shrinkage of the tissue beyond a pre-determined amount or percentage.
- a visual indicator can be used to allow the operator or surgeon to visually detect the shrinkage or contraction of the tissue being treated.
- a visual indicator 282 can be used to measure the shrinkage of the tissue 280.
- the visual indicator 282 can be applied to the surface of the tissue 280.
- the visual indicator 282 is applied to the surface of the tissue 280 between the first and second clamps 240, 260 using a non-toxic ink or other substance capable of being applied to a tissue. In so doing, the operator can visually inspect the indicator 282 as the thermal energy is being introduced into the treatment zone.
- the visual indicator 282 changes shape.
- the visual indicator 282 prior to the introduction of thermal energy is an elliptical pattern 284.
- the visual indicator 282 shrinks to a circular pattern 284'.
- the operator or surgeon can reduce the amount of thermal energy being supplied by the heat delivery modality 210 by regulating the power source 118 (FIG. 1).
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Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US09/802,288 US6689131B2 (en) | 2001-03-08 | 2001-03-08 | Electrosurgical device having a tissue reduction sensor |
US09/802,288 | 2001-03-08 |
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WO2002071966A1 true WO2002071966A1 (en) | 2002-09-19 |
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PCT/US2002/007081 WO2002071966A1 (en) | 2001-03-08 | 2002-03-07 | Electrosurgical device having a tissue reduction sensor |
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WO (1) | WO2002071966A1 (en) |
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Also Published As
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US7951148B2 (en) | 2011-05-31 |
US20040162552A1 (en) | 2004-08-19 |
US6689131B2 (en) | 2004-02-10 |
US20020128650A1 (en) | 2002-09-12 |
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