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WO1997014364A1 - Evacuation de fumees electrochirurgicales et systeme correspondant - Google Patents

Evacuation de fumees electrochirurgicales et systeme correspondant Download PDF

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Publication number
WO1997014364A1
WO1997014364A1 PCT/US1995/013149 US9513149W WO9714364A1 WO 1997014364 A1 WO1997014364 A1 WO 1997014364A1 US 9513149 W US9513149 W US 9513149W WO 9714364 A1 WO9714364 A1 WO 9714364A1
Authority
WO
WIPO (PCT)
Prior art keywords
inlet
smoke
scalpel
evacuator
vacuum
Prior art date
Application number
PCT/US1995/013149
Other languages
English (en)
Inventor
Donald R. Monson
Daniel E. Adamek
Ervin P. Fuchs
Original Assignee
Donaldson Company, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Donaldson Company, Inc. filed Critical Donaldson Company, Inc.
Priority to PCT/US1995/013149 priority Critical patent/WO1997014364A1/fr
Priority to AU38944/95A priority patent/AU3894495A/en
Publication of WO1997014364A1 publication Critical patent/WO1997014364A1/fr

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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
    • 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
    • A61B18/1402—Probes for open surgery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2218/00—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2218/001—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body having means for irrigation and/or aspiration of substances to and/or from the surgical site
    • A61B2218/007—Aspiration
    • A61B2218/008—Aspiration for smoke evacuation

Definitions

  • This invention relates generally to evacuation of smoke and fumes during surgery when surgical instruments, such as electrocautery scalpels or laser surgical devices, are employed. More particularly, it relates to an adaptable smoke evacuator and a system for smoke evacuation during such procedures.
  • a plume is generated.
  • This plume causes a variety of problems.
  • the visible smoke in the plume can impair the view of the surgeon, and an assistant is often necessary to clear the operative field using suction.
  • the fumes also cause a noxious odor which is a source of irritation to the surgeon, surgical assistants, and, during surgeries with local anesthesia, the patient.
  • recent studies have raised concerns regarding the potential health hazards which the plume can pose to surgical personnel, including carcinogens and viruses such as HIV.
  • the tissue is burned, and cell particles are released which may become entrained in the plume. These particles can potentially carry bacteria and viruses.
  • Smoke evacuators are known in the art. While smoke evacuation in the past has generally been done with an evacuator separate from the surgical instrument (usually held by an assistant to the surgeon) , this application relates to evacuators which are attached to or integral with the instrument. The vast majority of these devices are built into the scalpel, and thus would require a purchaser to buy the entire assembly as a unit. Examples include U.S. Patent Nos. 4,719,914, 5,242,442 and 5,269,781. These devices generally have an inlet in close proximity to the blade of the scalpel and a vacuum source connected thereto. The inlet is positioned either along side the blade, as in the '442 patent, or generally co-axial with the blade, as in the '914 patent.
  • Examples include U.S. Patent Nos. 5,055,100, 5,085,657 and 5,154,709. These devices, however, suffer from a variety of shortcomings. For example, the device of the '100 patent would not eliminate smoke as efficiently as one with a co-axial inlet. Also, due to the placement of the vacuum tubing, this device would be impaired for a left-handed user. Both the devices of the '657 and '709 patents would cause difficulties in operating the control buttons due to the placement of the vacuum hose . The '709 device, in particular, would cause manipulation problems as a result of the placement of the hose attachment on the front end of the scalpel.
  • the design of smoke evacuators involves a trade off between efficient evacuation and other considerations, such as visibility problems and the potential for unintentional suck down due to the placement of the inlet relative to the blade.
  • the most important parameters which affect these considerations include the size and shape of the inlet, the distance of the inlet from the distal tip of the blade, and the vacuum flow rate.
  • a smaller inlet and farther distance improves visibility but requires a higher vacuum flow rate, while a larger inlet and decreased distance reduces the necessary flow rate but hinders visibility.
  • Most prior art evacuators are connected to surgical room wall suction, which in the United States provides a maximum vacuum flow rate of approximately 3.0 cubic feet per minute (85 l.p.m.) . This is insufficient to exhaust an acceptable amount of smoke without placing the inlet too close to the distal tip of the blade.
  • Prior art systems have not achieved a proper balance between these relevant factors to achieve efficient evacuation while maintaining good visibility for the surgeon.
  • a feature found in some prior art smoke evacuation systems is to switch the suction to the evacuator on or off depending upon whether the electrosurgical device is being used.
  • Examples include U.S. Patent Nos. 5,108,389 and 5,160,334. These systems also include a mechanism for delaying the deactivation of the smoke evacuator for a period of time after the surgical device is turned off so as to evacuate residual smoke.
  • Both of these systems incorporate the switching mechanism into the circuitry of the power controller for the electrosurgical device. With such a design, one must either buy the entire unit or modify the power controller circuitry of an existing system to incorporate the switching mechanism. In either case, to meet certification requirements, this would require that the entire system be re-certified. It does not appear that an automatic smoke evacuation system is known in the prior art which is adaptable to an existing electrosurgical system without modifying the control circuitry.
  • What has been needed is a smoke evacuator which is adaptable to a variety of electrocautery scalpels, reduces noise and pressure loss, and minimizes suck down on tissue, and a system which provides an appropriate balance between maintaining visibility while achieving efficient evacuation.
  • an automatic smoke evacuation system which provides an automatic switching mechanism which is adaptable to an existing electrosurgical system without modification to its power control circuitry.
  • a blower which is acoustically treated to reduce noise, and a simple compact filter designed to eliminate contaminants before the air is recirculated into the operating room.
  • a smoke evacuator and system for evacuating smoke from surgical devices such as electrocautery scalpels and laser surgical devices.
  • surgical devices such as electrocautery scalpels and laser surgical devices.
  • the smoke evacuator of the present invention is intended primarily for attachment to electrocautery scalpels, certain aspects of the system can be used with other surgical devices as well.
  • the smoke evacuator comprises a generally tubular nose portion extending over the fore portion of the scalpel and having an inlet generally co-axial with the blade.
  • An offset duct in fluid communication with the nose portion extends at least partially along the lower side of the scalpel toward the aft portion of the scalpel.
  • the nose portion has a fore portion engagement sleeve defining an opening for receiving the fore portion of the scalpel. This opening includes a resilient material for sealing the opening with the fore portion of the scalpel.
  • the evacuator also includes mechanisms for attaching the offset duct to the scalpel and for attaching a vacuum tube to the offset duct.
  • the smoke evacuator comprises an annular inlet proximate the blade, vacuum tubing in fluid communication with the inlet, and a mechanism for creating a vacuum through the tubing and in the inlet.
  • the inner side of the annular inlet has a radiused leading edge, with the ratio of the radius to the inlet diameter being about between .15 and .25.
  • the smoke evacuator comprises an annular inlet proximate the blade of the scalpel and a plurality of axially outwardly and radially inwardly turned ribs spaced around the circumference of the annular inlet. These ribs prevent unintentional suck down on tissue in the vicinity of the inlet .
  • the invention comprises a smoke evacuation system for an electrocautery scalpel.
  • the system comprises a smoke evacuator having a generally tubular portion which is generally co-axial with the blade, with the leading edge of the tubular portion being a predetermined distance from the distal tip of the blade.
  • a vacuum in fluid communication with the evacuator provides a suction flow rate of about between 3.0 and 5.0 cubic feet per minute (85 and 140 l.p.m.) .
  • the inlet diameter is about between .30 and .60 inches (0.75 and 1.5 cm.)
  • the distance between the leading edge of the tubular portion and the distal tip of the blade is about between 1.0 and 1.5 inches (2.0 and 4.0 cm.) .
  • the invention comprises an automatic smoke evacuation system for a surgical instrument having a power cord, such as an electrocautery scalpel or a laser surgical apparatus.
  • the system comprises a smoke evacuator attached to the surgical instrument and a vacuum in fluid communication with the evacuator.
  • a device senses whether current is flowing through the power cord.
  • a valve is moveable between a first position wherein vacuum flow is provided to the evacuator and a second position wherein it is not.
  • a switch electronically controlled by the current sensing mechanism causes the valve to move to the first position in response to a current being sensed and to the second position in response to no current being sensed.
  • Figure 1 is a perspective view of a first embodiment of a smoke evacuator according to the present invention, shown attached to an electrocautery scalpel;
  • Figure 2 is a partial cross-sectional view of the smoke evacuator shown in Figure 1 as viewed generally from Section 2-2;
  • Figure 3 is a partial cross-sectional view of the smoke evacuator shown in Figure 1 viewed generally from Section 3-3;
  • Figure 4 is a schematic diagram of a smoke evacuation system according to the present invention
  • Figure 5 is a circuit diagram of a switch mechanism for an automatic smoke evacuation system according to the present invention
  • Figure 6 is a cross-sectional view of a vacuum blower for the system of the present invention.
  • Figure 7 is a cross-sectional view of a filter for the system of the present invention.
  • Figure 8 is a partial cross-sectional view of an inlet extension for a smoke evacuator according to the present invention.
  • Figure 9 is a partial cross-sectional view of a second embodiment of a smoke evacuator according to the present invention, shown attached to an electrocautery scalpel .
  • Smoke evacuator 10 is designed to be adaptable to a variety of electrocautery scalpels.
  • the evacuator of the present invention was specifically designed to be adaptable to scalpels such as Valleylab E2516, Conmed/Aspen 60-0300-501, Birtcher/Bard 130308, and NDM 30-0100, which are the four leading disposable electrocautery "pencils" sold in the United States.
  • scalpels such as Valleylab E2516, Conmed/Aspen 60-0300-501, Birtcher/Bard 130308, and NDM 30-0100, which are the four leading disposable electrocautery "pencils" sold in the United States.
  • the principles of the evacuator could be applied to other electrocautery scalpels as well, including non- disposable scalpels.
  • Smoke evacuator 10 is shown attached to such a typical electrocautery scalpel 20.
  • Scalpel 20 includes housing 22 with upper 24 and lower 25 sides and fore 26 and aft 27 portions. Control buttons 28 are provided on an upper side 24.
  • Control buttons 28 are provided on an upper side 24.
  • In electrocautery scalpels typically there is a "cut” button and a “coagulate” button.
  • Power cord 30 extends from the rear of aft portion 27 of scalpel 20, and is typically connected to a power control unit 112, as shown in Figure 4.
  • Blade 32 extends longitudinally from fore portion 26. In typical designs, blade 32 is received within receptacle 34, and can be replaced with another blade of the same or different length.
  • Smoke evacuator 10 includes generally tubular • nose portion 12 and offset duct 14 extending from nose portion 12 along lower side 25 of scalpel 20 toward aft portion 27 of scalpel 20.
  • Nose portion 12 includes fore portion engagement sleeve 17 defining engagement opening 16 for receiving fore portion 26 of scalpel 20.
  • sleeve 17 is merely an extension of nose portion 12, and opening 16 extends downwardly from an upper wall 13 of nose portion 12 to an upper wall 15 of offset duct 14. It will be understood, however, that sleeve 17 and opening 16 could be constructed and arranged in a variety of other ways to engage fore portion 26.
  • Opening 16 includes a resilient material 44 for sealing opening 16 to fore portion 26 of scalpel 20.
  • the seal is primarily a radial seal (some longitudinal force may also add to the seal) between an inner surface 19 of opening 16 (or a gasket as discussed below) and an outer surface 29 of fore portion 26.
  • This general configuration offers several advantages. Primarily, it allows evacuator 10 to be "retrofit" to a scalpel without requiring modifications to the scalpel.
  • Co- axial inlet 40 provides more efficient evacuation of smoke as compared to an inlet which is off to the side of blade 32.
  • the placement of nose portion 12, engagement opening 16 and offset duct 14 provide easy access to control buttons 28 and permit the device to be useable by both left and right-handed users.
  • Engagement opening 16 is preferably elliptical in shape and slanted so that its upper end is forward of its lower end. This configuration permits the opening to be better adaptable to a variety of scalpels, which may have fore portions with different shapes. It also helps align nose portion 12 with fore portion 26 of scalpel 20.
  • nose portion 12 and offset duct 14 are molded as a single plastic part.
  • a "living hinge" can be employed along the bottom so as to split the ecacuator into mirror image halves connected by the hinge.
  • they could be constructed using other materials, and/or with two or more parts in varying configurations, so long as fluid communication is provided between them. Because the evacuator 10 is constructed from a plastic with some resiliency (polystyrene) and engagement opening 116 is appropriately contoured, this could provide sufficient sealing of engagement opening 16 to fore portion 26 of scalpel 20.
  • a separate sealable gasket 44 such as a thin, heat sealable or ultrasonicaily bondable plastic film or a soft, tacky sealant material, is employed to provide better sealing.
  • gaskets of varying thickness could be employed to make evacuator 10 better adaptable to different scalpels.
  • Bonding wall 45 on upper perimeter of opening 16 provides a surface for attaching sealable gasket 44, creating a finite gap 46 between the upper portion of nose portion 12 and fore portion 26 of scalpel 20. This gap 46 also creates more uniform flow from around fore portion 26 of scalpel 20 to offset duct 14.
  • Offset duct 14 need not extend to the aft end of aft portion 27 of scalpel 20, as in the first embodiment shown in Figs. 1-3.
  • This arrangement positions swivel 52 for connection to a vacuum tube close to the center of gravity of scalpel 20.
  • dexterity may be enhanced by eliminating the drag caused by the vacuum tube extending from the aft end of scalpel 20.
  • offset duct 53 is attached to scalpel 20 through offset duct upper wall 54 extending to ratchet 58, which attaches to power cord 30 as in the first embodiment 10 (discussed below) .
  • Support rib 56 extends between upper wall 54 at its aft end to an upper side of swivel exit port 55. Exit port 55 is turned downwardly to move swivel 52 and the vacuum tube attached thereto away from scalpel 20, thereby reducing interference.
  • swivel 62 is attached to aft end 60 of offset duct 14. Swivel 62 is fit into recess 64, which provides sealing. Swivel 62 rotates within recess 64 to prevent torsional forces from being transferred from the vacuum tubing to scalpel 20. Also, exit port 63 is turned slightly downward to minimize inference. This allows the surgeon to better manipulate scalpel 20 when performing surgical procedures . Vacuum tubing is connected to swivel 62 by extending the tubing over the swivel so that tooth 66 engages the tubing. Swivel 62 is preferably made from a polymer material which has a naturally low friction coefficient, such as high density polyethylene, so as to make swivel 62 "self- lubricating. "
  • Offset duct 14 is attached to scalpel 20 via a ratchet mechanism 70 which permits evacuator 10 to be attached to a variety of scalpels.
  • Ratchet 70 includes clip 72, which clips onto power cord 30, and slide 73 having channels 75 and at least one tooth (not shown) .
  • Upper wall 16 of offset duct 14 extends past swivel 62 and inserts into channels 75, and includes notches 77 on its upper side for engagement with the tooth of slide 73. Lip 76 is liftable to disengage the tooth from notches 77.
  • This adjustable ratchet mechanism permits evacuator 10 to be able to accommodate a variety of different length scalpels. It will be recognized that numerous other adjustable ratchet arrangements could also be used.
  • ribs 82 Spaced around the circumference of annular nose inlet 40 is a plurality of ribs 82 which extend radially inwardly from the circumference and axially outwardly from inlet 40. These ribs 82 guard against unintentional suck down on tissue in the vicinity of inlet 40. Ribs 82 are preferably rounded and do not extend all the way to the center of inlet 40 so as to reduce wake turbulence in the region of maximum velocity and therefore the potential for aerodynamic noise. In the preferred embodiment, ribs 82 form a single part 80 or "standoff" which is snapped into recess 84 on the outer side of nose portion 12. It will be understood, however, that ribs 82 could be molded as part of nose inlet 40. Also, it may be preferable to eliminate one or more ribs at the top of standoff 80 so as to improve visibility for the surgeon.
  • nose extension 88 is shown for use with an extended blade 36 on scalpel 20.
  • Extension 88 snaps into recess 84, and includes an identical inlet configuration, with its own recess 89 for receiving standoff 80.
  • Nose extension 88 is preferably sized to position the leading edge of the inlet with respect to blade 36 and blade tip 37 identically as with the conventional short blade.
  • inlet 40 has what is referred to as a "Bellmouth" shape so as to reduce flow separation at leading edge 90 and therefore aerodynamic noise and pressure loss.
  • Leading edge 90 is radiused to a specific value which is dependent on inlet diameter 92. Attached flow can be assured when the ratio of the radius of leading edge 90 to inlet diameter 92 is approximately .18 or greater. In the preferred embodiment, a ratio of approximately .18 (with inlet diameter 92 being approximately .45 inches (1.1 cm.)) is chosen so as to maintain attached flow while keeping the total size of inlet 40 as small as possible.
  • inlet configuration of the present design is intended for a vacuum flow rate of approximately 3.0 to 5.0 cubic feet per minute (85 to 140 l.p.m.)
  • appropriate ratio and inlet diameter may vary depending upon the flow rate which is employed.
  • a system 110 for smoke evacuation is shown. While the system is designed primarily for use with electrocautery scalpels, certain features of the system could be employed in other applications as well, such as with laser surgery devices .
  • One of the features of system 110 is to employ vacuum tubing 120 which has an increasing diameter away from scalpel 10. A trade off must be made between making the diameter of tubing 120 at scalpel sufficiently large to achieve the necessary flow rates while not making it so large as to be unduly cumbersome for the surgeon. This balance can be achieved by gradually increasing the inner diameter of tubing 120 toward the vacuum source 140,150, thereby minimizing system pressure loses.
  • a plurality of tubes of different diameters could be employed in a stepped series fashion so as to achieve this same result.
  • PVC tubing is employed with a 7mm inner diameter at the evacuator 10 progressively enlarging to a .375 inch (1.0 cm.) inner diameter at the filter 130.
  • Flex tubing 122 with an inner diameter of about 1.0 inch (2.5 cm.) is then used to connect filter 130 to blower 140 or alternatively a wall suction source 150.
  • Smoke evacuation system 110 is designed to provide an optimal balance between efficient evacuation and minimizing interference with use of the scalpel. It has been determined that the vacuum flow rate which is necessary for efficient evacuation of smoke during electrocauterization is much higher than previously predicted. Prior estimates operated under the assumption that tissue is dehydrated. In reality, the tissue is completely hydrated, and the moisture contained within tissue cells becomes instantly converted to steam during cutting or cauterizing. This steam tends to jet sporadically with high velocity as cell walls burst, entraining smoke within the jets. As a result, it has been determined that a vacuum flow rate of at least between 3.0 and 5.0 cubic feet per minute (85 and 140 l.p.m.) is necessary to efficiently evacuate the smoke and steam produced. Generally, 80% or greater evacuation would be considered acceptable.
  • smoke can be efficiently evacuated with an inlet diameter 92 of between .30 and .60 inches (0.75 and 1.5 cm.) , so as to achieve a maximum inlet flow velocity estimated to be about between 30 and 100 feet per second (9.0 and 30.0 m/s) .
  • the distance between leading edge 90 of inlet 40 and distal tip 33 of blade 32 is preferably about between 1.0 and 1.5 inches (2.0 and 4.0 cm.) in order to achieve optimal evacuation with the specified flow rate, while minimizing visibility interference for the surgeon.
  • suction flow rate is between 4.0 and 4.5 cubic feet per minute (110 and 130 l.p.m.) and inlet diameter 92 is about .45 inches (1.1 cm.) , which results in an inlet flow velocity estimated to be about between 50 and 75 feet per second (15 and 23 m/s) .
  • the distance of leading edge 90 from distal tip 33 of blade 32 is 1.25 inches (3.2 cm.) in the preferred embodiment .
  • Vacuum suction can be provided by a stand alone blower 140 or alternatively with a wall suction source 150, as shown in Fig. 4.
  • Most hospital wall suction sources can provide only up to 3.0 cubic feet per minute (85 l.p.m.) flow rate. Therefore, two such sources 150 with a regulator to achieve the preferred flow rate would be necessary to achieve the desired flow rate.
  • the smoke evacuation system 110 provides suction to evacuator 10.
  • suction flow is subsequently cut off. It is preferred that the shutting off of flow is delayed for a period of time sufficient to clean up any residual smoke .
  • the automatic smoke evacuation system 110 slaves the activation or deactivation of the system to whether a current is sensed in power cord 30 of an electrosurgical device 20, as shown in Fig. 4.
  • This approach permits the evacuation system 110 to be adapted to an existing electrosurgical device, without requiring a modification to the circuitry of power controller 112 for device 20.
  • Current in power cord 30 can be sensed using a variety of known devices.
  • a radio frequency (RF) sensor 114 which senses electromagnetic energy, is employed.
  • RF sensor 114 through antenna 115, receives the radio frequency waves emitted from power cord 30 when a current is passing therethrough.
  • RF sensor 114 is appropriately placed near controller 112, and is tuned at 0.5 MHz in the preferred embodiment .
  • This frequency is chosen to tune RF sensor 114 to the frequency of the electromagnetic energy in power cord 30 and to reduce sensitivity to AM band radio frequencies.
  • the preferred RF sensor 114 is a radio frequency coil which is tuned to resonate at a particular frequency, in this case 0.5 MHz. Examples of • other current sensing devices which could be used include loop type inductive sensors, Hall effect sensors, and capacitive sensors.
  • Time delay circuit 117 includes reset circuit 119, which resets the time delay in the event that a current is sensed during the time delay period. This assures that the full reset time delay exists whenever the electrosurgical 20 instrument is deactivated. In the preferred embodiment, this time delay can be varied from between 1 to 10 seconds using control potentiometer 123.
  • the valve which is moved by solenoid 118 in the preferred embodiment is a sleeve valve 142 at the inlet of blower 140, as shown in Fig. 4. It will be understood that the automatic system 110 could also be arranged to operate a valve connected to other suction sources, such as a wall suction source.
  • Sleeve valve 142 consists of a plurality of circumferentially spaced slots 143 which correspond to slots in the inlet duct of blower 140. Solenoid 118 operates to rotate sleeve valve an appropriate number of degrees to line up the slots 143, thereby bypassing the majority of suction flow.
  • These slots 143 should preferably have a total open area which is at least a factor of 1.5 to 2.0 greater than the cross sectional area of the inlet duct.
  • the preferred valve 142 is acoustically treated with a 1.0 inch (2.5 cm.) thick open-cell urethane foam having a random noise reduction coefficient (NRC) of approximately 0.75.
  • RNC random noise reduction coefficient
  • Other valve designs could also be used, as for example a three-way "Y-type" valve. In normal operation, blower 140 will be run throughout the procedure, and opening and closing of sleeve valve 142 will therefore immediately turn suction to instrument 20 off and on.
  • Blower 140 is an AMETEK No. 116566-13 vacuum blower which is acoustically treated to minimize noise in the operating room.
  • the inlet is acoustically treated with a packed expansion can 144.
  • the cooling air motor 148 is acoustically and aerodynamically isolated from the combined blower and cooling air exit annulus 149 to prevent the cooling motor 148 from over- heating.
  • the height of chamber 146 is approximately one-half the diameter of the blower outlet 141 to minimize back pressure.
  • the same preferred ratio is employed for the cooling motor air inlet 147 relative to the cooling fan inlet (not shown) . Air passes through expansion chamber 146 and exits blower 140 through annulus 149.
  • Annulus 149 has a length to gap ratio of approximately 10 to provide optimal noise attenuation.
  • the acoustical insulation 145 employed is preferably 1.0 inch (2.5 cm.) thick urethane open cell acoustical foam with a preferred NRC rating of approximately 0.75.
  • a filter 130 for use in the preferred system is shown.
  • Filter 130 includes particulate filter 132 capable of filtering particles in the 0.2 to 0.7 ⁇ m range, and a granular activated carbon absorption bed 134 sufficient to eliminate odors for a period estimated to be approximately 30 minutes of actual operational use.
  • the preferred geometry provides a uniform flow distribution across the media 132, 134 so as to maximize their use. This is accomplished when the ratio of the outlet header height 137 to the inlet header height 136 is approximately between 1.40 and
  • Inlet 135 and outlet 138 are appropriately connected to vacuum tubing 120 and flex tubing 122, respectively, as shown in Fig. 4.
  • the preferred inlet chamber 139 is tapered (not shown) in the downstream direction to a larger width.
  • Filter 130, along with vacuum tubing 120 and evacuator 10, are intended for one-time use, and therefore everything upstream of flex tubing 122 is replaced with each use. It should be understood that the present invention is not limited to the preferred embodiments discussed above, which are illustrative only. Changes may be made in detail, especially in matters of shape, size, arrangement of parts, or material of components within the principles of the invention, to the full extent indicated by the broad general meanings of the terms in which the appended claims are expressed.

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Abstract

La présente invention concerne une évacuation de fumée et un système destiné à des dispositifs tels que les scalpels à électrocautère et les instruments chirurgicaux à laser. La géométrie de l'évacuation, qui est conçue pour en permettre le montage a posteriori sur des scalpels à électrocautère existants, comporte un orifice d'entrée arrondi et un écarteur permettant d'éviter l'aspiration de tissus par inadvertance. Le système optimise le débit d'aspiration, le diamètre de l'orifice d'entrée et l'écartement d'aspiration de façon à obtenir une évacuation efficace tout en assurant une bonne visibilité. L'invention concerne également un système d'évacuation automatique des fumées qui met en fonction ou hors fonction l'évacuation de fumée suivant qu'il y a détection d'une intensité dans le cordon d'alimentation électrique de l'instrument électrochirurgical.
PCT/US1995/013149 1995-10-20 1995-10-20 Evacuation de fumees electrochirurgicales et systeme correspondant WO1997014364A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/US1995/013149 WO1997014364A1 (fr) 1995-10-20 1995-10-20 Evacuation de fumees electrochirurgicales et systeme correspondant
AU38944/95A AU3894495A (en) 1995-10-20 1995-10-20 Electrosurgical smoke evacuator and system

Applications Claiming Priority (1)

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PCT/US1995/013149 WO1997014364A1 (fr) 1995-10-20 1995-10-20 Evacuation de fumees electrochirurgicales et systeme correspondant

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Cited By (14)

* Cited by examiner, † Cited by third party
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EP1060752A1 (fr) * 1998-03-17 2000-12-20 American Immuno Tech, LLC Système d'élimination de déchets chirugicaux liquides et gazeux
EP1000586A3 (fr) * 1998-11-16 2001-01-31 ATMOS MEDIZINTECHNIK GmbH & Co. Dispositif chirurgical d'aspiration
WO2005110260A1 (fr) * 2004-05-13 2005-11-24 Arcusa Villacampa Francisco Ja Piece a main pour traitements medicochirurgicaux
EP1691716A4 (fr) * 2003-12-09 2008-10-08 Rubicor Medical Inc Manchon d'aspiration et dispositif d'intervention pourvu d'un tel manchon de aspiration
EP2285303A4 (fr) * 2008-06-12 2011-05-18 Ioan Cosmescu Dispositif pivotant pour bistouri électrochirurgical et évacuation des fumées associées
CN103519881A (zh) * 2012-07-03 2014-01-22 玛格戴恩医疗产品公司 具有可调实用导管的手持件
CN105407936A (zh) * 2013-03-14 2016-03-16 玛格戴恩医疗产品公司 流体排空装置
WO2016065336A1 (fr) * 2014-10-24 2016-04-28 Integrated Surgical LLC Dispositif d'aspiration pour instruments chirurgicaux
EP3388012A1 (fr) 2017-04-14 2018-10-17 Candela Corporation Système d'évacuation de fumée
US10821212B2 (en) 2015-07-13 2020-11-03 Conmed Corporation Surgical suction device that uses positive pressure gas
US10926007B2 (en) 2015-07-13 2021-02-23 Conmed Corporation Surgical suction device that uses positive pressure gas
WO2022199775A1 (fr) 2021-03-26 2022-09-29 Cfn Medico Aps Module d'évacuation de fumée et procédé d'étalonnage du module d'évacuation de fumée
US20240108396A1 (en) * 2022-09-29 2024-04-04 Robert Lee Bromley V Nose for Smoke Evacuation
EP4356858A1 (fr) * 2022-10-20 2024-04-24 Covidien LP Crayon électrochirurgical avec évacuation de fumée et visualisation d'électrode

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0447121A2 (fr) * 1990-03-15 1991-09-18 Valleylab, Inc. Dispositif de coagulation pour le gaz
US5154709A (en) * 1990-09-04 1992-10-13 Johnson Gerald W Vacuum hood attachment for electrosurgical instruments
US5224944A (en) * 1991-01-07 1993-07-06 Elliott Martin P Aspiration tip for a cautery handpiece
US5431650A (en) * 1992-12-11 1995-07-11 Cosmescu; Ioan Vortex hand piece shroud for automatic smoke evacuator system for a surgical laser apparatus and method therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0447121A2 (fr) * 1990-03-15 1991-09-18 Valleylab, Inc. Dispositif de coagulation pour le gaz
US5154709A (en) * 1990-09-04 1992-10-13 Johnson Gerald W Vacuum hood attachment for electrosurgical instruments
US5224944A (en) * 1991-01-07 1993-07-06 Elliott Martin P Aspiration tip for a cautery handpiece
US5431650A (en) * 1992-12-11 1995-07-11 Cosmescu; Ioan Vortex hand piece shroud for automatic smoke evacuator system for a surgical laser apparatus and method therefor

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1060752A1 (fr) * 1998-03-17 2000-12-20 American Immuno Tech, LLC Système d'élimination de déchets chirugicaux liquides et gazeux
EP1000586A3 (fr) * 1998-11-16 2001-01-31 ATMOS MEDIZINTECHNIK GmbH & Co. Dispositif chirurgical d'aspiration
EP1691716A4 (fr) * 2003-12-09 2008-10-08 Rubicor Medical Inc Manchon d'aspiration et dispositif d'intervention pourvu d'un tel manchon de aspiration
WO2005110260A1 (fr) * 2004-05-13 2005-11-24 Arcusa Villacampa Francisco Ja Piece a main pour traitements medicochirurgicaux
US8414576B2 (en) 2005-12-02 2013-04-09 Ioan Cosmescu Swivel device for electrosurgery pencil and surgical smoke evacuation
EP3067003A1 (fr) * 2008-06-12 2016-09-14 I.C. Medical, Inc. Dispositif tournant avec un membre rotatif pour attacher un tube à vide à un crayon électrochirurgical pour l'évacuation de fumée
EP2285303A4 (fr) * 2008-06-12 2011-05-18 Ioan Cosmescu Dispositif pivotant pour bistouri électrochirurgical et évacuation des fumées associées
CN103519881A (zh) * 2012-07-03 2014-01-22 玛格戴恩医疗产品公司 具有可调实用导管的手持件
AU2014236546B2 (en) * 2013-03-14 2018-07-05 Megadyne Medical Products, Inc. Fluid evacuation device
EP2968711A4 (fr) * 2013-03-14 2016-11-16 Megadyne Med Prod Inc Dispositif d'évacuation de fluide
CN105407936A (zh) * 2013-03-14 2016-03-16 玛格戴恩医疗产品公司 流体排空装置
WO2016065336A1 (fr) * 2014-10-24 2016-04-28 Integrated Surgical LLC Dispositif d'aspiration pour instruments chirurgicaux
US9486562B2 (en) 2014-10-24 2016-11-08 Integrated Surgical, Llc Suction device for surgical instruments
US9750855B2 (en) 2014-10-24 2017-09-05 Conmed Corporation Suction device for surgical instruments
US9867913B2 (en) 2014-10-24 2018-01-16 Conmed Corporation Suction device for surgical instruments
US10022479B2 (en) 2014-10-24 2018-07-17 Conmed Corporation Suction device for surgical instruments
US10034970B2 (en) 2014-10-24 2018-07-31 Conmed Corporation Suction device for surgical instruments
US10835649B2 (en) 2015-07-13 2020-11-17 Conmed Corporation Surgical suction device that uses positive pressure gas
US10821212B2 (en) 2015-07-13 2020-11-03 Conmed Corporation Surgical suction device that uses positive pressure gas
US10835648B2 (en) 2015-07-13 2020-11-17 Conmed Corporation Surgical suction device that uses positive pressure gas
US10850012B2 (en) 2015-07-13 2020-12-01 Conmed Corporation Surgical suction device that uses positive pressure gas
US10926007B2 (en) 2015-07-13 2021-02-23 Conmed Corporation Surgical suction device that uses positive pressure gas
US10926008B2 (en) 2015-07-13 2021-02-23 Conmed Corporation Surgical suction device that uses positive pressure gas
EP3388012A1 (fr) 2017-04-14 2018-10-17 Candela Corporation Système d'évacuation de fumée
US10925669B2 (en) 2017-04-14 2021-02-23 Candela Corporation Smoke evacuation system
US11911100B2 (en) 2017-04-14 2024-02-27 Candela Corporation Smoke evacuation system
US12285211B2 (en) 2017-04-14 2025-04-29 Candela Corporation Smoke evacuation system
WO2022199775A1 (fr) 2021-03-26 2022-09-29 Cfn Medico Aps Module d'évacuation de fumée et procédé d'étalonnage du module d'évacuation de fumée
US20240108396A1 (en) * 2022-09-29 2024-04-04 Robert Lee Bromley V Nose for Smoke Evacuation
EP4356858A1 (fr) * 2022-10-20 2024-04-24 Covidien LP Crayon électrochirurgical avec évacuation de fumée et visualisation d'électrode

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