WO1992004934A1 - Combined hyperthermia and dilation catheter - Google Patents
Combined hyperthermia and dilation catheter Download PDFInfo
- Publication number
- WO1992004934A1 WO1992004934A1 PCT/US1991/005173 US9105173W WO9204934A1 WO 1992004934 A1 WO1992004934 A1 WO 1992004934A1 US 9105173 W US9105173 W US 9105173W WO 9204934 A1 WO9204934 A1 WO 9204934A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tissue
- prostatic
- dilation
- balloon
- catheter tube
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M25/1011—Multiple balloon catheters
-
- 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
-
- 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
- A61B18/1815—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 microwaves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F7/00—Heating or cooling appliances for medical or therapeutic treatment of the human body
- A61F7/12—Devices for heating or cooling internal body cavities
- A61F7/123—Devices for heating or cooling internal body cavities using a flexible balloon containing the thermal element
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
- A61B2017/00238—Type of minimally invasive operation
- A61B2017/00274—Prostate operation, e.g. prostatectomy, turp, bhp treatment
-
- 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
- A61B2018/00166—Multiple lumina
-
- 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
- A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
- A61B2018/00547—Prostate
-
- 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
- A61B18/1815—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 microwaves
- A61B2018/1861—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 microwaves with an instrument inserted into a body lumen or cavity, e.g. a catheter
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M2025/1043—Balloon catheters with special features or adapted for special applications
- A61M2025/1084—Balloon catheters with special features or adapted for special applications having features for increasing the shape stability, the reproducibility or for limiting expansion, e.g. containments, wrapped around fibres, yarns or strands
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M29/00—Dilators with or without means for introducing media, e.g. remedies
- A61M29/02—Dilators made of swellable material
Definitions
- Prostatic disease is one of the most common diseases in men in the United States. Prostatic disease, as referred to here, includes' benign prostatic hypertrophy (BPH) and prostatic cancer. These two etiologies affect a majority of men over the age of 60.
- BPH benign prostatic hypertrophy
- prostatic cancer prostatic cancer
- TURP may only be applicable to patients who are not at risk for surgical complications.
- pharmacological means such as vasoactive and antiandrogen agents.
- the vasoactive drugs primarily used are alpha, receptors which reduce smooth muscle tone within the prostate which is in part responsible for the mechanical obstruction of urine through the prostatic urethra.
- vasoactive drugs have exhibited some efficacy in relieving symptoms, it should be noted that mechanical obstruction may still exist and may promote the development of urinary tract infection, bladder stones and possible upper urinary tract obstruction.
- Antiandrogen agents have also been used to reduce the symptoms associated with BPH.
- prostatic cancer While the etiology of prostatic cancer is also not well known, it has been suggested that this disease is either biochemically or genetically induced. The symptoms of prostatic cancer are often insidious and may not be clinically manifest until the course of the disease is advanced.
- the current treatment of choice for prostatic cancer is to perform a radical prostatectomy which involves surgical excision of the prostate gland.
- cardiovascular disease The use of dilation and hyperthermia has been suggested for treatment of obstructive atheromatous plaque in cardiovascular disease.
- the etiology of cardiovascular disease is, however, markedly different from that of prostatic diseases.
- Stenoses in Body Channels in Particular Coronary Vessels and Peripheral and Arterial Vessels, disclose catheters each having at least one embodiment thereof featuring balloon dilation to mechanically compress plaque deposits on the inner surface of a vessel wall to expand the lumen of the vessel, and the application of microwave energy to the plaque to soften, coagulate, and/or electroabrade the plaque, to further expand the effective cross-sectional area of the lumen of the vessel available for flow through the vessel.
- U.S. Patent No. 4,799,479 to Spears for Method and Apparatus for Angioplasty discloses a device utilizing balloon dilation and the application of thermal energy supplied by means of a laser. Balloon inflation is used to facilitate fusion of disrupted plaque, which, together with arterial wall tissue, is heated and fused together to form a smooth, cylindrically-shaped channel in the lumen of the vessel which is resistant to restenosis.
- the cause of the reduction of the available flow channel in the lumen of the vessel i.e., the prostatic urethra is an externally induced compression of the vessel wall due to the proliferation of epithelial and stromal cell tissue, which is benign in the case of BPH and cancerous in cases of prostatic cancer.
- treatment of diseases of the prostate must cause a reduction in the mass of the prostatic tissue responsible for creating the compressive forces on the urethra which results in the obstruction of flow through the lumen of the urethra. This is accomplished either by surgical excision of the tissue or by other means which will cause changes in the cells with therapeutic effects.
- the temperature of all the target cells must be raised to a minimum of 42.5°C and maintained at that temperature for a sufficient period of time to cause cell changes. Moreover, it has been observed that with small increases in temperature above this minimum level there is an exponential increase in cell changes and concomitant therapeutic effect.
- Hyperthermia is also a means for treatment of other, non-cancerous, hyperplastic cell conditions such as BPH.
- the present invention provides an apparatus and method for treatment of prostate disease, both benign and cancerous, which utilizes in combination dilation of the prostatic urethra and the application of hyperthermal effects in diseased tissue cells.
- the apparatus and method of the present invention affords dual modes of therapy.
- both dilation and hyperthermia have a direct effect in alleviating the symptoms of the disease.
- prostatic cancer the contribution of the effects of dilation alone are not fully understood, and will not be markedly evident in alleviating symptoms unless the course of the disease has progressed to the extent that the proliferation of cancerous prostatic cells is large enough to exert a compressing force on the prostatic urethra causing an acute obstruction of the prostatic urethra.
- the dilation mode of therapy also enhances the efficacy of the hyperthermal mode of treatment by restricting blood to the target tissue thereby reducing the heat sink effect and allowing the transfer of heat energy to be more readily and uniformly absorbed by the target tissue to produce hyperthermal effects therein.
- the heat sink effect is an effect wherein blood- supplied tissue, both healthy and diseased, tends to absorb heat energy in order to dissipate the heat and prevent damage to the tissue.
- the effect is the result of the high heat capacity of blood.
- the effect is important to maintaining viability of the tissue and is desirable.
- the reduction or cut-off of the blood supply to the tissue is done for a sufficiently long period of time to enable treatment of the diseased tissue, however the blood supply is resumed before necrosis of the healthy tissue occurs.
- the temporary application of pressure to the tissue is sufficient to cause a reduction in blood flow to the tissue.
- this is conveniently achieved utilizing the dilation balloon, which when inflated to proper pressure, both dilates an obstructed prostatic urethra and also causes a reduction in blood flow to all tissue being compressed, both the target diseased prostatic tissue as well as surrounding healthy prostatic and urethral tissue and tissue of the urethelium, the lining between the prostate and the urethra. This enables a more effective hyperthermal treatment of diseased tissue utilizing minimum power consumption.
- the apparatus of the present invention comprises a flexible catheter tube for insertion into the urethra.
- the dilation means is a dilation balloon and the heating means is a microwave antenna.
- FIG. 1 A fixation balloon for securing the apparatus in place after it has been anatomically correctly positioned; cooling means for temperature moderation of the heating means to prevent overheating and for cooling the urothelium adjacent to the prostatic urethra to prevent damage to the tissue of the urothelium; a guidewire to facilitate insertion of the apparatus and increase its stiffness; a protuberance on the catheter tube, capable of being rectally palpated by the physician to assist in positioning of the apparatus; temperature sensing means for monitoring the temperature of the heating means; and feedback circuit means for regulating the amount of energy provided by the heating means.
- a fixation balloon for securing the apparatus in place after it has been anatomically correctly positioned
- FIG. 1 A fixation balloon for securing the apparatus in place after it has been anatomically correctly positioned
- FIG. 1 A fixation balloon for securing the apparatus in place after it has been anatomically correctly positioned
- FIG. 1 A fixation balloon for securing the apparatus in place after it has been anatomically
- Fig. 1 shows a combined dilation balloon and hyperthermia catheter according to the present invention.
- Fig. 2 shows a combined dilation balloon and hyperthermia catheter according to the present invention, also incorporating a fixation balloon, as it is inserted in the male urethra with both fixation balloon and dilation balloon in inflated condition.
- Fig. 3 is a fragmentary sectional view of the apparatus of Fig. 2.
- Fig. 4a is a cross-sectional view of the distal end of the device of Fig. 3 showing the dilation balloon in inflated condition.
- Fig. 4b is a cross-sectional view of the proximal end of the device of Fig. 3 showing the fixation balloon in inflated condition.
- Fig. 5b is a cross-sectional end view of the apparatus through location 5b-5b of Fig. 4b.
- Fig. 6 shows details of a microwave antenna as typically utilized in the apparatus of the present invention.
- proximal refers to an orientation towards the end of the apparatus external to the urethra and nearest the operator of the apparatus
- distal refers to an orientation towards the end of the apparatus which is inserted into the urethra, nearest to the bladder.
- a combined dilation balloon and hyperthermia apparatus 1 according to the present invention is illustrated, showing a dilation balloon 18 in deflated position for insertion and withdrawal and in inflated position (shown in dashed lines) for dilation of the prostatic urethra.
- Heating element 22 at the distal end of the catheter tube 12 is also shown.
- the fixation balloon 20 anchors the apparatus 1 in place and secures it against significant movement in the longitudinal direction, particularly, past the bladder neck 17 and up into the bladder.
- Inflatable dilation balloon 18 is mounted on catheter tube 12 at its distal end and when the apparatus 1 is in place, is properly positioned in the prostatic urethra 9 which passes through the prostate 15.
- Heating means 22 is axially mounted at the distal end of catheter tube 12 and is situated inside dilation balloon 18.
- the heating means is a microwave or radio frequency transmitting antenna or a heat-conducting element through which a thermal fluid is circulated to provide heat.
- the heating element 22 is a microwave antenna which radiates microwave energy at a frequency of about 915 MHz.
- Catheter tube 12 is formed of a material which is sufficiently flexible to follow the shape of the urethra upon insertion of the apparatus, while also being sufficiently rigid to enable the apparatus to pass any obstructions in the urethra without bending.
- Catheter tube 12 is composed of or is covered with a biocompatible material to avoid irritation of the urethra. Suitable materials for catheter tube 12 include silicone, polyester, polyvinylchloride and polyurethane.
- dilation balloon 18 is replaced with a plurality of smaller dilation balloons which can be inflated either separately or together and which give the distal end of the apparatus greater flexibility.
- the energy field radiated by the heating element 22 may be asymmetrical.
- a plurality of centering balloons are positioned inside dilation balloon 18 to maintain heating element 22 equidistant from the surface of the dilation balloon. This helps to ensure that the amount of energy reaching prostatic tissue is uniform and symmetrical.
- dilation balloon 18 In the deflated state, such a balloon made from a non-distensible material is in a folded configuration.
- limited expandability of dilation balloon 18 is achieved by making the balloon of a limited distensible composite material wherein an elastic balloon material is surrounded by a non-elastic material, such as cloth, which limits the expansion size of the balloon and assists in deflation of the balloon.
- the dilation balloon 18 is expandable to a diameter of from about 40 French to about 120 French, where the diameter in French is 3.0 times the diameter in millimeters (mm) . Therefore, the dilation balloon 18 of the present apparatus ranges in size from about 12 to about 40 mm in diameter.
- Microwave antenna 22 is typically a linear coaxial microwave antenna with choke or a standard single junction dipole microwave antenna. The latter is depicted in Fig. 6.
- the dipole microwave antenna 22 is constructed from a semi-rigid coaxial cable having an inner conductor 52 covered by an insulator 53.
- the microwave antenna 22 is mounted in antenna lumen 34.
- the coaxial cable 29 from which the antenna is formed extends from the proximal antenna opening 36 through the length of catheter tube 12 and terminates in the slotted radiating portion of the antenna 22 at the distal end of antenna lumen 34 in catheter tube 12.
- the antenna is fixedly attached, slidably mounted or detachably mounted in the antenna lumen 34.
- the antenna is generally fixed when the overall apparatus is manufactured to be disposable.
- the antenna is typically slidably mounted where the antenna is of the single junction type with one radiating gap or slot to enable movement of the antenna to direct maximal radiated energy onto various portions of the prostatic tissue along the prostatic urethra.
- the antenna is detachable where use of a more expensive type of antenna is contemplated and only the catheter tube portion of the apparatus is disposed of after use.
- an outer conductor 54 is cut circumferentially from the coaxial cable at location 55 to form an axial separation gap of about 0.1 cm between the cut portions of the outer insulator.
- a metallic connector 56 is soldered between the distal ends of the inner and outer conductors.
- This simple dipole type antenna operates substantially identically to other dipole style antennae having a soldered connection between the inner conductor and the outer conductor adjacent to the gap.
- the operation of the dipole microwave antenna 22 as is utilized in the apparatus of the present invention is described more fully in U.S. Patent No. 4,825,880 to Stauffer et al for I plantable Helical Coil Microwave Antenna, which is incorporated herein by reference.
- Other types of dipole antennae such as the sheered coaxial slot type, the balun-fed folded dipole type, the multiple junction type, the bare-tip type, and the insulated-tip type as are known in the art, may alternatively be utilized as the microwave antenna 22 in other embodiments of the apparatus of the present invention.
- the microwave antenna 22 is slidably mounted inside the antenna lumen 34.
- the apparatus may then be operated in such a way as to enable the antenna 22 to be moved forward and backward within the catheter tube 12 during the catheterization procedure to uniformly expose the prostatic tissue to the maximum amount of energy radiated from a single junction dipole antenna.
- the position of the antenna can be monitored by ultrasound imaging or by X-ray fluoroscopy.
- catheter tube 12 has a plurality of from 2 to 6 lumens for various features.
- Figs. 5a and 5b are cross-sectional views of the apparatus 1 at locations 5a-5a and 5b-5b, respectively, of the catheter tube 12, as shown in Figs. 4a and 4b.
- antenna lumen 34 extends from the distal end of catheter tube 12 through the tube to the proximal end where it terminates in proximal antenna opening 36.
- Dilation lumen 38 communicates between dilation balloon inflation port 40 and dilation balloon 18, via dilation balloon opening 42.
- Figs. 4a, 4b, 5a and 5b additionally show other lumens in a preferred embodiment of the apparatus.
- Fixation lumen 44 communicates between fixation balloon inflation port 46 and fixation balloon 20 via fixation balloon opening 48.
- One alternative embodiment of the apparatus includes a plurality of more than two ports and connectors for other lumina, such as for the inflation cooling outflow, thermometry means,and antenna.
- the ports may be arranged in a manifold.
- Dilation balloon inflation port 40 and fixation balloon inflation port 46 are each provided with a valve or a syringe fitting 50 and 52, respectively, to allow for connection of the fill ports with syringes or other means for injection or circulation of inflation/cooling fluid.
- Dilation drainage lumen 41 communicates between dilation balloon 18, via dilation balloon outlet 43 to dilation outlet port 49.
- Fixation drainage lumen 61 communicates between fixation balloon 20, via fixation balloon outlet 63 to fixation outlet port 66.
- dilation lumen 38 and fixation lumen 44, and dilation drainage lumen 41 and fixation drainage lumen 61 are co binable into single inflation and drainage lumens, respectively.
- the apparatus may also include a feedback circuit for regulating the amount of energy provided to the antenna 22.
- Urine drainage lumen 67 allows urine to drain from the bladder 17 while the apparatus is in position. Urine drainage lumen 67 extends from the distal end of the catheter tube 12, which is positioned in the bladder neck, all the way through to the proximal end of the catheter tube.
- the fixation and dilation balloons are capable of being inflated to a predetermined size by the injection of corresponding volumes of inflation fluid into each, which is supplied through their respective inflation lumens or through a common inflation lumen in the case where the apparatus is so adapted to utilize a single common inflation fluid supplied through a single lumen.
- the corresponding drainage lumen or lumens are closed by closing the respective outlet port(s) and the fluid is injected to inflate the balloons.
- the inlet port(s) are then closed to maintain the fluid inside the balloons.
- a cooling fluid or fluids which are identical to the inflation fluid or fluids utilized to inflate the fixation and dilation balloons are dynamically circulated through the inflation lumen(s) , into the balloons and out through the drainage lumen(s) .
- the inflation/cooling fluid circulated through the dilation balloon is in contact with microwave antenna 22 and serves to moderate the antenna surface temperature to prevent overheating. This also allows more efficient absorption of the energy being radiated from the antenna by the diseased tissue being hyperthermally treated.
- the flow rate of the fluid being circulated and the capacity of the lumens conducting the flow is determined by the amount of cooling required to moderate the antenna surface temperature and maintain the surface temperature of the urothelium below the therapeutic temperature at which tissue damage and cell destruction occur.
- the apparatus 1 is guided into and along the urethra. To facilitate insertion, the apparatus 1 may be guided over a previously inserted guide wire (not illustrated) or drainage lumen 34 may contain a guide wire to increase the stiffness of the apparatus 1.
- the apparatus 1 is advanced within the urethra 11 and into the prostatic urethra 9 until the dilation balloon 18 is positioned at the bladder neck 17 and in proximity with the prostate 15.
- Fig. 1 also shows the position of the dilation balloon 18 relative to the pubic bone 19 and the external sphincter 21 situated in the pelvic floor.
- the fixation balloon 20 is, at the same time, properly located in the bulbous urethra.
- the doctor determines that the apparatus 1 is properly positioned by rectally palpating the protuberance 37 circumferentially located on catheter tube 12 at a position before fixation balloon 20 in a direction towards the proximal end of catheter tube 12.
- the position of the apparatus 1 can also be determined by fluoroscopic or ultrasonic means.
- the doctor knows that the dilation balloon 18 is at its proper location at the prostatic urethra 9 since the fixation balloon 20 of the apparatus 1 is positioned along the catheter tube 12 at a distance from the dilation balloon 18 such that when fixation balloon 20 is at the bulbous urethra, then the dilation balloon 18 is at the prostatic urethra 9. Because the apparatus 1 has such a configuration, inadvertent dilation of the external sphincter 21 and the possible harmful effects consequent therefrom are avoided.
- the dilation balloon 18 is then inflated with an inflation fluid circulated through dilation lumen 38.
- a volume of inflation fluid is injected into dilation balloon 18.
- the inflation fluid used to inflate the dilation balloon 18 can be the same as or different than the inflation fluid used to inflate the fixation balloon.
- the inflation fluid used to inflate the dilation balloon 18 is deionized water, mineral oil or other suitable fluids with low dielectric properties which act to reduce refracted microwave energy and facilitate coupling of the microwave energy emitted from the surface of microwave antenna 22 into the prostatic tissue.
- an inlet port on the dilation lumen 38 is connected to an inflating means, such as a syringe, and the inflation fluid is injected to inflate the dilation balloon 18 by fluid pressure.
- the dilation balloon 18 is made of limited distensible material, which causes the balloon to expand upon inflation to a predetermined maximum diameter.
- Expansion of dilation balloon 18 causes the dilation balloon to exert pressure against the obstructive prostatic tissue in the prostatic urethra, thereby causing a widening of the prostatic urethra to an unobstructed diameter which relieves the symptoms of BPH.
- the pressure exerted on the prostatic tissue also creates a reduction in blood flow to the tissue which is beneficial during the hyperthermia part of the treatment procedure when microwave energy is applied to the prostatic tissue.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP91514830A JPH05506174A (en) | 1990-09-14 | 1991-07-29 | Combined hyperthermia and dilatation catheter |
AU84375/91A AU664157B2 (en) | 1990-09-14 | 1991-07-29 | Combined hyperthermia and dilation catheter |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US58272690A | 1990-09-14 | 1990-09-14 | |
US582,726 | 1990-09-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1992004934A1 true WO1992004934A1 (en) | 1992-04-02 |
Family
ID=24330286
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1991/005173 WO1992004934A1 (en) | 1990-09-14 | 1991-07-29 | Combined hyperthermia and dilation catheter |
Country Status (9)
Country | Link |
---|---|
US (1) | US5496271A (en) |
EP (1) | EP0548122A1 (en) |
JP (1) | JPH05506174A (en) |
AU (1) | AU664157B2 (en) |
CA (1) | CA2089739A1 (en) |
DE (1) | DE9190129U1 (en) |
IE (1) | IE913252A1 (en) |
PT (1) | PT98950A (en) |
WO (1) | WO1992004934A1 (en) |
Cited By (40)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0579599A1 (en) * | 1989-06-16 | 1994-01-26 | Mmtc, Inc. | Catheters for treating prostate disease |
EP0597463A2 (en) * | 1992-11-13 | 1994-05-18 | DORNIER MEDICAL SYSTEMS, Inc. | Thermotherapiesonde |
FR2698780A1 (en) * | 1992-12-03 | 1994-06-10 | Siemens Ag | Catheter for the treatment of a pathological tissue. |
EP0672401A2 (en) * | 1994-03-11 | 1995-09-20 | ARGOMED Ltd. | Thermal treatment apparatus |
WO1997028840A1 (en) * | 1996-02-12 | 1997-08-14 | Mentor Urology, Inc. | Prostatic tissue expander |
WO1998047557A1 (en) * | 1997-04-23 | 1998-10-29 | Pera Giuseppe | Method for the diagnosis, treatment and prophylaxis of premature ejaculation and catheter for the diagnosis, treatment and prophylaxis of premature ejaculation |
KR19980079759A (en) * | 1997-04-25 | 1998-11-25 | 클라우드 티혼 | Prostate Disorder Relief Catheter |
WO2000010472A1 (en) | 1998-08-20 | 2000-03-02 | Mmtc, Inc. | Method for forming a biological stent |
US6123083A (en) * | 1997-08-29 | 2000-09-26 | Urologix, Inc. | Device and method for treatment of a prostate while preventing urethral constriction due to collagen rich tissue shrinkage |
WO2000025848A3 (en) * | 1998-11-02 | 2000-10-05 | Mentor Corp | Prostatic tissue dilation balloon catheter |
US6379347B1 (en) | 1998-05-28 | 2002-04-30 | Terumo Kabushiki Kaisha | Energy irradiation apparatus |
US6468267B1 (en) | 1999-08-13 | 2002-10-22 | Terumo Kabushiki Kaisha | Thermal therapy apparatus |
US6530921B1 (en) | 1999-07-30 | 2003-03-11 | Terumo Kabushiki Kaisha | Laser irradiation apparatus |
US6544257B2 (en) | 2000-07-03 | 2003-04-08 | Olympus Optical Co., Ltd. | Thermal treatment apparatus |
US6579286B1 (en) | 1999-08-13 | 2003-06-17 | Terumo Kabushiki Kaisha | Laser irradiation apparatus |
US6589233B1 (en) | 1999-08-12 | 2003-07-08 | Terumo Kabushiki Kaisha | Laser irradiation apparatus |
US6599287B2 (en) | 2000-07-03 | 2003-07-29 | Terumo Kabushiki Kaisha | Medical energy irradiation apparatus |
US6605082B2 (en) | 2000-07-03 | 2003-08-12 | Olympus Optical Co., Ltd. | Thermal treatment apparatus |
US6607526B1 (en) | 1999-10-27 | 2003-08-19 | Terumo Kabushiki Kaisha | Laser irradiation apparatus |
US6695871B1 (en) | 1999-08-13 | 2004-02-24 | Terumo Kabushiki Kaisha | Thermal therapy apparatus |
US6764485B2 (en) | 2001-06-29 | 2004-07-20 | Olympus Optical Co., Ltd. | Thermal treatment apparatus |
US6893430B2 (en) | 1998-02-04 | 2005-05-17 | Wit Ip Corporation | Urethral catheter and guide |
EP1626659A2 (en) * | 2003-05-10 | 2006-02-22 | Seedings Life Science Ventures, LLC | Urethral identification system and method of identifying a patient's urethral anatomic course in real time for the precise placement of a prostate treatment element |
EP1627474A1 (en) * | 2003-05-23 | 2006-02-22 | Healthpia Co., Ltd. | Probe module for treating prostate diseases and portable prostate medical treatment apparatus |
US7008416B2 (en) | 2001-06-29 | 2006-03-07 | Terumo Kabushiki Kaisha | Medical energy irradiation apparatus |
US7022118B2 (en) | 2001-06-29 | 2006-04-04 | Terumo Kabushiki Kaisha | Medical energy irradiation apparatus |
EP2303173A2 (en) * | 2008-07-01 | 2011-04-06 | Medwaves, Inc. | Angioplasty and tissue ablation apparatus and method |
EP2334366A1 (en) * | 2008-09-16 | 2011-06-22 | Intersect Partners, LLC | Device and methods for sampling prostate fluid |
US9072532B2 (en) | 2006-07-14 | 2015-07-07 | Neuwave Medical, Inc. | Energy delivery systems and uses thereof |
US9119649B2 (en) | 2009-07-28 | 2015-09-01 | Neuwave Medical, Inc. | Energy delivery systems and uses thereof |
US9192438B2 (en) | 2011-12-21 | 2015-11-24 | Neuwave Medical, Inc. | Energy delivery systems and uses thereof |
US9861440B2 (en) | 2010-05-03 | 2018-01-09 | Neuwave Medical, Inc. | Energy delivery systems and uses thereof |
US10342614B2 (en) | 2004-04-29 | 2019-07-09 | Wisconsin Alumni Research Foundation | Triaxial antenna for microwave tissue ablation |
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Also Published As
Publication number | Publication date |
---|---|
IE913252A1 (en) | 1992-02-25 |
JPH05506174A (en) | 1993-09-16 |
AU8437591A (en) | 1992-04-15 |
EP0548122A1 (en) | 1993-06-30 |
PT98950A (en) | 1993-10-29 |
DE9190129U1 (en) | 1993-07-01 |
AU664157B2 (en) | 1995-11-09 |
CA2089739A1 (en) | 1992-03-15 |
US5496271A (en) | 1996-03-05 |
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