US20040092913A1 - Endovenous closure of varicose veins with mid infrared laser - Google Patents

Endovenous closure of varicose veins with mid infrared laser Download PDF

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Publication number
US20040092913A1
US20040092913A1 US10/699,212 US69921203A US2004092913A1 US 20040092913 A1 US20040092913 A1 US 20040092913A1 US 69921203 A US69921203 A US 69921203A US 2004092913 A1 US2004092913 A1 US 2004092913A1
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Prior art keywords
fiber optic
delivery device
laser
laser delivery
optic laser
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Abandoned
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US10/699,212
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English (en)
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David Hennings
Mitchell Goldman
Robert Weiss
Eric Taylor
Don Johnson
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New Star Lasers Inc
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COOL TOUCH Inc
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Priority to US10/699,212 priority Critical patent/US20040092913A1/en
Application filed by COOL TOUCH Inc filed Critical COOL TOUCH Inc
Assigned to COOL TOUCH INCORPORATED reassignment COOL TOUCH INCORPORATED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GOLDMAN, MITCHEL P., HENNINGS, DAVID R., JOHNSON, DON, TAYLOR, ERIC B., WEISS, ROBERT A.
Publication of US20040092913A1 publication Critical patent/US20040092913A1/en
Priority to US11/562,944 priority patent/US7921854B2/en
Priority to US11/855,762 priority patent/US7644715B2/en
Priority to US12/565,673 priority patent/US20100016846A1/en
Priority to US12/565,665 priority patent/US8365741B2/en
Priority to US12/604,815 priority patent/US9782222B2/en
Priority to US12/877,885 priority patent/US20110218525A1/en
Assigned to NEW STAR LASERS, INC. reassignment NEW STAR LASERS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: COOL TOUCH INCORPORATED
Priority to US14/920,308 priority patent/US20160113714A1/en
Abandoned legal-status Critical Current

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    • 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
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • A61B18/22—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor
    • A61B18/24—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor with a catheter
    • 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
    • A61B2017/00084—Temperature
    • 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
    • A61B2018/00005—Cooling or heating of the probe or tissue immediately surrounding the probe
    • 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
    • A61B2018/00053—Mechanical features of the instrument of device
    • A61B2018/00184—Moving parts
    • A61B2018/00196—Moving parts reciprocating lengthwise
    • 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
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • A61B18/22—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor
    • A61B2018/2255—Optical elements at the distal end of probe tips
    • A61B2018/2261—Optical elements at the distal end of probe tips with scattering, diffusion or dispersion of light
    • 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
    • A61B2090/036—Abutting means, stops, e.g. abutting on tissue or skin abutting on tissue or skin

Definitions

  • the present invention relates generally laser assisted method and apparatus for treatment of varicose veins, and more particularly, to an improved catheter method and apparatus to target blood vessel walls directly and with a controlled amount of the appropriate type of energy using a motorized pull-back device.
  • Navarro et al. U.S. Pat. No. 6,398,777 issued Jun. 4, 2002, teaches a device and method of treating varicose veins that involves using a laser whose wavelength is 500 to 1100 nm and is poorly absorbed by the vessel wall. Laser energy of wavelengths from 500 to 1100 nm will penetrate 10 to 100 mm in tissue unless stopped by an absorbing chromophore. See figure X. Most of the energy used by this method passes through the vessel wall and causes damage to surrounding tissue. Procedures using these wavelengths can require cooling of the surface of the leg to prevent burning caused by transmitted energy. Operative complications of this technique include bruising and extensive pain caused by transmitted energy and damage to surrounding tissue.
  • Navarro also claims the delivery of energy in bursts. This is required using their technique because they have no means to uniformly control the rate of energy delivered. Navarro teaches a method of incrementally withdrawing the laser delivery fiber optic line while a laser burst is delivered. In clinical practice this is very difficult to do and results in excessive perforations and complications.
  • GSV greater saphenous vein
  • RF radiofrequency
  • RF energy can be delivered through a specially designed endovenous electrode with microprocessor control to accomplish controlled heating of the vessel wall, causing vein shrinkage or occlusion by contraction of venous wall collagen. Heating is limited to 85 degrees Celsius avoiding boiling, vaporization and carbonization of tissues. In addition, heating the endothelial wall to 85 degrees Celsius results in heating the vein media to approximately 65 degrees Celsius which has been demonstrated to contract collagen. Electrode mediated RE vessel wall ablation is a self-limiting process. As coagulation of tissue occurs, there is a marked decrease in impedance that limits heat generation.
  • the presumed target is intravascular red blood cell absorption of laser energy.
  • thermal damage with resorption of the GSV has also been seen in veins emptied of blood. Therefore, direct thermal effects on the vein wall probably also occur.
  • the extent of thermal injury to tissue is strongly dependent on the amount and duration of heat the tissue is exposed to. When veins are, devoid of blood, vessel wall rupture occurs.
  • This invention is a method and device to treat varicose veins by targeting the vessel wall directly with a more appropriate wavelength of laser light and controlling that energy precisely using a motorized pull back device, diffuse fiber delivery systems and utilizing thermal feedback of the treated tissue. This technique allows less energy to be used and helps prevent damage to surrounding tissue and perforation of the vessel.
  • This new technique is more predicable and controllable in the presence of residual blood and is more effective in targeting only the vessel wall.
  • the present improved device and method in contrast to the teachings of the prior art does not require direct intraluminal contact with the vessel wall because it is less affected by residual blood.
  • the energy passes through the residual blood without boiling or exploding and is absorbed primarily by the vessel wall. This is a significant clinical improvement over the methods of the prior art, with much better control and predictability.
  • the present improved device and method utilize a continuously running laser and energy delivery with a continuous controlled withdrawal rate using a motorized pull back device.
  • FIG. 1 is a representative schematic block diagram of a preferred embodiment of the apparatus 100 of the present invention for performing a preferred embodiment of the varicose vein closure procedure of the present invention.
  • FIG. 2A is a representative view of varicosed veins 200 to be treated according to the preferred embodiment of the method and apparatus of the present invention.
  • FIG. 2B is a representative-view of the GSV 202 to be treated according to the preferred embodiment of the method and apparatus of the present invention.
  • FIG. 3A is a representative view showing the beginning of the introducer or dilator 300 for percutaneous access according to the preferred embodiment of the method and apparatus of the present invention.
  • FIG. 3B is a representative view showing the use of the introducer or dilator 300 with the laser fiber 306 passing through the lumen 302 of the dilator 300 and into the GSV 202 according to the preferred embodiment of the method and apparatus of the present invention.
  • FIG. 4 is a representative view of the use of an ultrasound device 400 according to the preferred embodiment of the method and apparatus of the present invention.
  • FIG. 5 is a representative view of a physician 500 performing manual compression of tissue near the tip 308 of the fiber 306 according to the preferred embodiment of the method and apparatus of the present invention.
  • FIG. 6 is a representative view of the non-contact thermal sensor 600 and the cooling system 602 of the preferred embodiment of the method and apparatus of the present invention.
  • FIG. 7 is a is a representative view of a varicosed vein 200 , showing prolapsed valves 690 .
  • FIG. 8 is a representative view of administration of tumescent anesthesia 700 and how it compresses the vein 200 around the fiber 306 according to the preferred embodiment of the method and apparatus of the present invention.
  • FIG. 9A is a representative view of a diffusing fiber tip according to the preferred embodiment of the method and apparatus of the present invention.
  • FIG. 9B is a representative view of another diffusing fiber tip according to the preferred embodiment of the method and apparatus of the present invention.
  • FIG. 9C is a representative view of yet another diffusing fiber tip according to the preferred embodiment of the method and apparatus of the present invention.
  • FIG. 10 shows curves for absorption coefficients of melanin, hemoglobin and water as a function of wavelength according to the preferred embodiment of the method and apparatus of the present invention.
  • FIG. 11 is a photograph of experimental results showing the distal greater saphenous vein immediately after treatment with a 1320 nm Nd:YAG laser.
  • FIG. 1 is a representative schematic block diagram of a preferred embodiment of the apparatus 100 of the present invention for performing a preferred embodiment of the varicose vein closure procedure of the present invention.
  • the system 100 of the present invention includes a laser console 102 , a motorized, fiber optic catheter “pull-back” machine 104 , a fiber optic catheter or other laser delivery device 106 to deliver laser energy into the patient's vein, a sterile field 108 and a controller 110 .
  • FIG. 2A is a representative view of varicosed veins 200 to be treated according to the preferred embodiment of the method and apparatus of the present invention.
  • FIG. 2B is a representative view of the GSV 202 to be treated according to the preferred embodiment of the method and apparatus of the present invention.
  • FIG. 3A is a representative view showing the beginning of the introducer or dilator 300 for percutaneous access according to the preferred embodiment of the method and apparatus of the present invention.
  • FIG. 3B is a representative view showing the use of the introducer or dilator 300 with the laser fiber 306 passing through the lumen 302 of the dilator 300 and into the GSV 202 according to the preferred embodiment of the method and apparatus of the present invention.
  • FIG. 4 is a representative view of the use of an ultrasound device 400 according to the preferred embodiment of the method and apparatus of the present invention.
  • FIG. 5 is a representative view of a physician 500 performing manual compression of tissue near the tip 308 of the fiber 306 according to the preferred embodiment of the method and apparatus of the present invention.
  • the means for applying mechanical compression of the tissue near the tip 308 of the fiber includes manual compression, mechanical clamps or straps, chemical or other drug-induced swelling, etc.
  • FIG. 7 is a is a representative view of a varicosed vein 200 , showing prolapsed valves 690 .
  • FIG. 8 is a representative view of administration of tumescent anesthesia 700 and how it compresses the vein 200 around the fiber 306 according to the preferred embodiment of the method and apparatus of the present invention.
  • tumescent anesthesia 700 Prior to treatment with the laser 102 , blood is removed from the vessel 200 by using tumescent anesthesia 700 , typically consisting of lidocaine 0.05 to 0.1% in normal saline. Alternate compositions for tumescent anesthesia 700 will be known to those skilled in the art.
  • a quartz or sapphire fiber optic 306 is inserted into the vein 200 via a 16 gauge needle or similar, or through the vein 200 which has been externalized through a 2-3 mm incision with a phlebectomy hook (not shown).
  • the fiber 306 is preferably 500 to 600 um in diameter, but fibers from 50 um to 1 mm or more or less, could be used.
  • the fiber catheter 300 is threaded through the length of the vein 200 .
  • the position of the fiber 306 within the vein 200 is noted by observing the red aiming beam of the laser 102 as it is emitted from the tip 304 of the catheter 300 and is visible through the skin.
  • a duplex ultrasound device 400 or similar may be used to visualize the fiber tip 308 as well as the cannulated blood vessel 200 to determine vein wall contraction and closure.
  • the catheter 300 must either be removed prior to pull-back, or be secured to the fiber 306 so that both the fiber 306 and the cannula or catheter 300 are retracted simultaneously.
  • the catheter 300 is connected to a motorized pullback device 104 either inside or outside of the sterile field 108 of the patient.
  • the procedure begins by starting the pull back for about 2 or 3 mm and then turning the laser 102 on at about 5 watts of power.
  • the procedure could also be done at 1 to 20 watts of power by varying the speed of the pullback device 104 .
  • Optical absorption curves presented by Baumgardner, Anderson, and Grove show that the primary absorbing chromophore in a vein for the 810, 940 and 1.06 um laser wavelengths is hemoglobin.
  • the 1.2 to 1.8 um laser wavelengths are ideally suited to penetrate the small amount of remaining blood in the vessel 200 but also is much more strongly absorbed in the vessel wall 704 by collagen. Most of the energy is concentrated in the wall 704 for heating and shrinkage and is not transmitted through to surrounding tissue 702 . This dramatically increases, the safety of the procedure.
  • these laser wavelength are considered more “eye” safe than the 800 to 1.06 um lasers, decreasing the risk of eye damage to the doctor and others in the operating arena.
  • the Nd:YAG laser 102 or any other suitable, similar laser can be used.
  • This laser 102 can operate at a wavelength of 1.32 um and can be either pulsed or continuous wave. This procedure works best when the laser 102 is continuous or pulsed at a high repetition rate to simulate a continuous output.
  • the repetition rate for a pulsed laser 102 should be 10 Hz to 10,000 Hz.
  • lasers 102 such as Nd:YAP, ER:YAP, ER:YLF and others could be used to provide laser wavelengths in the 1.2 to 1.8 um region. These lasers 102 can be powered by optically pumping the laser crystal using a xenon or krypton flashlamp or laser diodes. They may be continuously pumped or pulsed using electro optical or acousto-optical shutters-or by pulsing the, flashlamp itself. Lasers 102 in this wavelength region also include diode lasers that emit 1.2 to 1.8 um wavelengths directly, or fiber lasers that use a length of doped fiber optic as the lasing medium.
  • thermocouple or infrared thermal detector 600 has been described for other applications, including on laser delivery fibers and for the treatment of varicose veins 202 using an radiofrequency heating device.
  • a thermocouple on the end of the laser delivery fiber optic device for the treatment of varicose veins, delivery of thermal energy can be more precisely controlled.
  • a non-contact thermal sensor can be located in the laser console and measure tip temperature by measuring the black body infrared radiation profile emitted at the opposite end of the fiber reflected from the treatment site, typically via a beamsplitter in the laser console.
  • a small-diameter sapphire fiber can be constructed that can be sterilized and re-used.
  • Data obtained from the non-contact thermal sensor equipment 600 can also be used to either servo control delivery of the laser energy to maintain a certain temperature at the treatment site, or the control system can be used as a safety device, i.e., to terminate delivery of laser energy if a certain temperature is exceeded.
  • thermal feedback device 600 can be an external device that measures the heat that is transmitted out of the side of the vein 200 or 202 and heats up the surface of the skin 608 adjacent the treated vein 200 or 202 .
  • this detector can be either a contact thermocouple or a, non contact infrared detector 600 .
  • a particularly advantageous use of this type of thermal detection would be to automatically activate a cooling device 602 , such as a cryogen spray, onto the skin surface 604 to keep it cool, or to send an alarm signal to the operator of the laser that too much energy is being delivered to and escaping from the treatment site.
  • the laser operator could point an external detector at a red aiming light that is visible through the skin from the end of the treatment, fiber, similar to the use of the ultrasound device currently used, in order to control the location and duration of the delivery of the laser energy.
  • FIG. 6 is a representative view of the non-contact thermal sensor 600 and the cooling system 602 of the preferred embodiment of the method and apparatus of the present invention.
  • Non-contact thermal sensors 600 as well as contact devices, including RTDs, are well known in the art.
  • the cooling device 602 can be any suitable, controlled device which allows a predetermined amount of cryogenic fluid to be dispensed from an on-board fluid reservoir or from an external/line source.
  • the device 602 is computer controlled, to provide spurts or squirts of cryogenic fluid at a predetermined rate or for a predetermined duration.
  • the cryogenic fluid is dispensed onto the surface of the skin 604 in an area adjacent the fluid dispensing nozzle 606 , and the non-contact thermal sensor 600 determines the temperature of the skin in the same area 604 or in an area 608 distal from the area being cooled 604 .
  • the present invention incorporates by reference the following issued patents with regards surface cooling methods and apparatus utilized in the present invention: U.S. patent application Ser. No. 08/692,929 filed Jul. 30, 1996, now U.S. Pat. No. 5,820,626.
  • U.S. patent application Ser. No. 10/185,490 filed Nov. 3, 1998, now U.S. Pat. No. 6,413,253.
  • Diffusing tip fibers are well known for use with high energy lasers in other fields particularly to coagulate cancerous tumors. In addition they have been used to direct low intensity visible radiation in conjunction with photo dynamic cancer therapy.
  • diffusing tip fibers typically require a scattering material like ceramic to be attached to the tip of a fiber in order to overcome index matching properties of the blood and liquid that the fiber is immersed into. It is frequently insufficient to abrade, roughen or shape the end of a quartz fiber by itself because the index of refraction of typical types of quartz is very close to the index of the immersing liquid, therefore any shape or structure formed in the glass or quartz portion would be ineffective in the liquid.
  • material is selected that has bulk light scattering characteristics, like most ceramics, i.e., light is scattered as it passes through the material, as opposed to simply providing surface scattering properties.
  • diffusing tip fibers for the treatment of varicose veins is unique and has not been previously described.
  • Adding a ceramic or quartz cap to the end of a small fiber will also aid in inserting the fiber in the vein.
  • the cap can be made smooth and rounded so that the fiber tip does not catch on the vein or on valves within the vein as it is being inserted.
  • a cap or smooth tip also reduces the chance of perforating the vein with a sharp fiber tip.
  • FIG. 9A is a representative view of a diffusing fiber tip 308 A according to the preferred embodiment of the method and apparatus of the present invention.
  • a ceramic or other suitable material diffusing tip 902 has an internal screw thread 904 which screws onto a buffer portion 906 of the fiber optic laser delivery device 306 .
  • the threaded portion 904 can be replaced with a clip portion or any, other suitable mechanical connection.
  • a non-toxic, heat-resistant-or other suitable epoxy 908 is used to permanently or removably mount the diffusing tip 902 to the fiber optic laser delivery device 306 .
  • FIG. 9B is a representative view of another diffusing fiber tip 308 B according to the preferred embodiment of the method and apparatus of the present invention.
  • a small, circular diffusing bead or head 920 formed of ceramic or other suitable, appropriate material is coupled to the fiber optic laser delivery device 306 .
  • a non-toxic, heat-resistant or other suitable epoxy 908 is used to permanently or removably mount the diffusing tip 920 to the fiber optic laser delivery device 306 .
  • FIG. 9C is a representative view of yet another diffusing fiber tip 308 C according to the preferred embodiment of the method and apparatus of the present invention.
  • a quartz tube 922 is placed over the distal end 906 of the optical fiber laser delivery device 306 , thereby forming a sealed air chamber 924 .
  • a spherical or other shaped diffusing ball 926 is placed within the air chamber 924 such that electromagnetic radiation directed through the fiber optic laser delivery device 306 is diffused as it is delivered from the tip 922 of the device 308 C.
  • a non-toxic, heat. resistant or other suitable epoxy 908 or other suitable attachment means is used to permanently or removably mount the quartz capillary tube 922 to the fiber optic laser delivery device 306 .
  • FIG. 10 shows curves for absorption coefficients of melanin, hemoglobin and water as a function of wavelength according to the preferred embodiment of the method and apparatus of the present invention. It will be observed in FIG. 10 that the region between about 550 nm to about 1060 nm shows high hemoglobin absorption and low water absorption, as is well known in the prior art technology. It will further be observed that the region between about 1200 nm to about 1800 nm shows low hemoglobin and higher water absorption, which is a key to the present invention.
  • EXPERIMENTAL RESULTS A novel endoluminal laser was evaluated in 12 incompetent greater saphenous veins in 11 patients.
  • a 550 um quartz fiber is inserted into the vein through an externalization approach as previously described and threaded up to the saphenofemoral junction.
  • the position of the fiber within the vein is noted by observing the red aiming beam of the laser as it is emitted from the tip of the catheter as well as through Duplex evaluation.
  • the catheter is connected to a motorized pull back device. The procedure begins by starting the pull back for about 2 or 3 mm and then turning the laser on in a near continuous mode at 5W at 167 mjoules given at a repetition rate of 30 Hz. All laser fibers were withdrawn with a motorized pull-back system at a rate of 1 mm/second.
  • the average length of treated GSV was-1.7.45+/ ⁇ 3 cm. Average fluence utilized was 755 Joules over 160+/ ⁇ 20 seconds for an average of 4.7 JIsec.
  • the distal 3 cm was excised, the proximal portion ligated with 3/0 vicryl suture and placed in formaldehyde for histopathologic processing and evaluation.
  • Nine veins were evaluated by a dermatopathologist blinded to the purpose and parameters of the experiment.
  • FIG. 11 is a photograph of experimental results showing the distal greater saphenous vein immediately after treatment with a 1320 nm Nd:YAG laser.
  • Table 2 describes the extent of thermal damage into the vein wall in mm of amorphous amphophilic material. In addition, the layers of vein wall exhibiting thermal damage were described. Full thickness vein wall damage occurred in all specimens.
  • Optical absorption curves show that the primary absorbing, chromophore in a vein for the 810, 940 and 1064 nm laser wavelengths is hemoglobin.
  • the 1 320 nm laser wavelength is ideally suited to penetrate the small amount of remaining blood in the vessel and is much more strongly absorbed in the vessel wall by collagen. Most of the energy is concentrated in the wall for heating and shrinkage.
  • This study demonstrates that the 1320 nm-Nd:YAG laser with an automated pull-back system is safe and effective for endovascular laser destruction of the GSV.

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US10/699,212 2002-10-31 2003-10-30 Endovenous closure of varicose veins with mid infrared laser Abandoned US20040092913A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US10/699,212 US20040092913A1 (en) 2002-10-31 2003-10-30 Endovenous closure of varicose veins with mid infrared laser
US11/562,944 US7921854B2 (en) 2002-10-31 2006-11-22 Endovenous laser treatment for varicose veins
US11/855,762 US7644715B2 (en) 2002-10-31 2007-09-14 Restless leg syndrome treatment
US12/565,665 US8365741B2 (en) 2002-10-31 2009-09-23 Restless leg syndrome treatment
US12/565,673 US20100016846A1 (en) 2002-10-31 2009-09-23 Restless Leg Syndrome Treatment
US12/604,815 US9782222B2 (en) 2002-10-31 2009-10-23 System and method for endovenous treatment of varicose veins with mid infrared laser
US12/877,885 US20110218525A1 (en) 2002-10-31 2010-09-08 Preparation For Endovenous Laser Ablation
US14/920,308 US20160113714A1 (en) 2002-10-31 2015-10-22 Preparation For Endovenous Laser Ablation

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US42256602P 2002-10-31 2002-10-31
US10/699,212 US20040092913A1 (en) 2002-10-31 2003-10-30 Endovenous closure of varicose veins with mid infrared laser

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US11/562,944 Continuation US7921854B2 (en) 2002-10-31 2006-11-22 Endovenous laser treatment for varicose veins

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PCT/US2003/035178 Continuation-In-Part WO2004039435A2 (fr) 2002-10-31 2003-10-30 Fermeture endoveineuse de veines variqueuses au laser infrarouge moyen
US11/562,944 Continuation-In-Part US7921854B2 (en) 2002-10-31 2006-11-22 Endovenous laser treatment for varicose veins
US11/855,762 Continuation-In-Part US7644715B2 (en) 2002-10-31 2007-09-14 Restless leg syndrome treatment
US12/604,815 Continuation US9782222B2 (en) 2002-10-31 2009-10-23 System and method for endovenous treatment of varicose veins with mid infrared laser

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Cited By (55)

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US20020068866A1 (en) * 2000-08-14 2002-06-06 Zikorus Arthur W. Method and apparatus for positioning a catheter relative to an anatomical junction
US20040153060A1 (en) * 2003-02-04 2004-08-05 Cardiodex Ltd. Methods and apparatus for hemostasis following arterial catheterization
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US9782222B2 (en) 2017-10-10
US20100042085A1 (en) 2010-02-18
WO2004039435A2 (fr) 2004-05-13
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AU2003287511A1 (en) 2004-05-25
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