Patents by Inventor Jay J. Eum

Jay J. Eum has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20040220557
    Abstract: An apparatus and method for warming the urethra of a patient during ablative surgery. In one embodiment, at least one ablative surgical device is inserted into a prostate region of the patient. A Joule-Thomson warming assembly is inserted through the patient's urethra and into the bladder. The Joule-Thomson warming assembly is operated to warm an outer surface thereof during operation of the ablative surgical devices. The urethra is warmed by the outer surface of the Joule-Thomson warming assembly to preserve living tissue thereof.
    Type: Application
    Filed: April 30, 2003
    Publication date: November 4, 2004
    Inventors: Jay J. Eum, Thach Duong
  • Publication number: 20040133194
    Abstract: Various embodiments of open system heat exchange catheters and methods of use are disclosed. The various catheters can be used with various ablative surgical devices. One specific exemplary use is in conjunction with cryosurgical probes involving ablation of the prostate, in which the integrity of the urethra is desired to be maintained. Other uses involve various heating ablative devices. In one embodiment an injection tube assembly is used to provide heat exchange fluid through the urethra to the bladder where it is then expelled via a suprapubic suction tube. In other embodiments a coaxial tube assembly is utilized which defines a passageway for either expelling the bladder fluid or for providing access to an endoscope. In other embodiments a double lumen assembly is utilized that defines a passageway for expelling bladder fluid.
    Type: Application
    Filed: January 4, 2003
    Publication date: July 8, 2004
    Inventors: Jay J. Eum, Thach Duong
  • Publication number: 20040073203
    Abstract: A cryosurgical probe includes an actuator housing assembly and an actuator assembly. The actuator housing assembly includes an actuator housing having an elongated central opening therethrough. The actuator housing has a proximal end portion and a distal end portion. A delivery system for a cryogenic fluid, includes a first end secured to the proximal end portion of the actuator housing. An insulation layer has a proximal portion securely attached to the proximal end portion of the actuator housing. An actuator assembly includes a rotatable actuator having a portion thereof contained within the actuator housing. The rotatable actuator is rotatable relative to the actuator housing. A cryosurgical shaft assembly is securely attached to the rotatable actuator. The insulation layer extends along an inner surface of the cryosurgical shaft to define insulated portions of the cryosurgical shaft and uninsulated portions.
    Type: Application
    Filed: September 2, 2003
    Publication date: April 15, 2004
    Inventors: Xiaoyu Yu, Sanford D. Damasco, Jay J. Eum
  • Patent number: 6702846
    Abstract: A stent system and method for use in the prostate gland. The stent is made of a shape memory alloy such as nitinol, and has a low temperature martensite state, with a martensite transition temperature below body temperature, and a high temperature austenite state, with an austenite transition temperature at or above body temperature, and a memorized shape in the high temperature austenite state which is a helical coil of diameter large enough to hold the prostatic urethra open. The stent is used to heat the prostate and is left in the prostatic urethra while the prostate heals. After the prostate is substantially healed, the stent is cooled to its martensite state and is easily removed from the urethra.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: March 9, 2004
    Assignee: Endocare, Inc.
    Inventors: Paul W. Mikus, William G. Moseley, Jay J. Eum
  • Patent number: 6643535
    Abstract: An imaging device receives imaging data from a treatment region of a patient, processes the imaging data and provides imaging output data and imaging signals. A computer system includes a guidance module for processing the imaging signals and providing treatment guidance plan to an operator. A treatment module acquires and processes surgical device output data, for optimally controlling treatment parameters and providing feedback information to the operator based on the treatment guidance plan. A set of surgical devices includes at least one ablative device for providing ablation of the treatment region based on the treatment parameters and operator input; and, at least one temperature sensing device for acquiring temperature data from the treatment region and providing a temperature sensing device output signal which is a portion of the surgical device output data. The treatment guidance plan is utilized for appropriately placing the ablative device and the temperature-sensing device.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: November 4, 2003
    Assignee: Endocare, Inc.
    Inventors: Sanford D. Damasco, Jawahar M. Ali, David J. Battles, Paul W. Mikus, Jay J. Eum
  • Patent number: 6585729
    Abstract: The cryosurgical system comprises a Joule-Thomson cryoprobe including a Joule-Thomson nozzle and a cryoprobe outlet. The Joule-Thomson nozzle is in fluid communication with the cryoprobe outlet. A high pressure gas supply line is aligned to supply gas to the Joule-Thomson cryoprobe. An operating cut-off valve is operatively connected to the high pressure gas supply line, the valve being operable to supply and cut off high pressure gas to the Joule-Thomson cryoprobe. A vent valve assembly is operatively connected to the high pressure gas supply line, the vent valve assembly being operable to vent gas from the high pressure supply line immediately upon operation of the operating cut-off valve to cut off high pressure gas to the Joule-Thomson cryoprobe. An interlock controls the vent valve assembly, the interlock being operable to open the vent valve assembly immediately upon operation of the cut-off valve to cut off high pressure gas to the Joule-Thomson cryoprobe.
    Type: Grant
    Filed: June 25, 2001
    Date of Patent: July 1, 2003
    Assignee: Endocare, Inc.
    Inventor: Jay J. Eum
  • Publication number: 20030078490
    Abstract: The system for providing computer guided ablation of tissue of a patient includes an imaging device, an ablative surgical computer system, and a set of surgical devices. The imaging device receives imaging data from a treatment region of a patient, processes the imaging data and provides imaging output data and imaging signals. The imaging output data is available to an operator. The ablative surgical computer system includes a guidance module for processing the imaging signals and providing a treatment guidance plan to the operator; and, a treatment module for acquiring and processing surgical device output data, for optimally controlling treatment parameters and providing feedback information to the operator based on the treatment guidance plan.
    Type: Application
    Filed: November 27, 2002
    Publication date: April 24, 2003
    Inventors: Sanford D. Damasco, Jawahar M. Ali, David J. Battles, Paul W. Mikus, Jay J. Eum
  • Publication number: 20030055415
    Abstract: The malleable cryosurgical probe includes a cryostat assembly and a cryoprobe assembly. The cryostat assembly includes an elongated shaft assembly having at least one malleable segment thereof and a closed distal end. The shaft assembly includes at least one freezing portion, at least one thermally insulated portion and a thermally insulating element positioned about the thermally insulated portion. A cryostat is operably associated with the elongated shaft assembly. It includes a cryostat inlet for receiving gas entering the cryostat, a cryostat outlet and a heat exchanger positioned between the cryostat outlet and the cryostat inlet. The heat exchanger receives gas from the cryostat inlet and provides heat transfer between gas flowing within the cryostat and fluid exterior thereto. At least one Joule-Thomson nozzle is in fluid communication with the cryostat outlet. The at least one Joule-Thomson nozzle expands gas expelled therefrom.
    Type: Application
    Filed: September 20, 2001
    Publication date: March 20, 2003
    Inventors: Xiaoyu Yu, Jay J. Eum, David J. Battles
  • Patent number: 6517569
    Abstract: Two embodiments for a stent delivery catheter are disclosed. In the first embodiment, the stent delivery catheter comprises an outer sheath, a peel-away sheath, and an inner sheath. In the second embodiment, the stent delivery catheter comprises an outer sheath and an inner tubular member which distally ends in a tongue having an arcuate cross section.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: February 11, 2003
    Assignee: Endocare, Inc.
    Inventors: Paul W. Mikus, Jay J. Eum, Dennis Bui, Gregory Kelly
  • Publication number: 20020198518
    Abstract: An entry position grid for aiding a user in locating the approximate entry points of a plurality of cryoprobes into a patient, wherein the cryoprobes are inserted into the perineal area of the patient and then into the prostate, the entry position grid including a frame portion having a center longitudinal axis, a grid portion extending across the frame portion, the grid portion defining a plurality of evenly spaced discrete openings, identifying indicia located on the frame that identifies each discrete opening, each discrete opening being adapted to allow the user to position the cryoprobes through the entry position grid and into the patient at an angle that is not parallel to the center axis, the grid portion comprising a continuous strand of flexible material that is attached to the frame portion.
    Type: Application
    Filed: April 11, 2002
    Publication date: December 26, 2002
    Inventors: Paul W. Mikus, Jay J. Eum, Wilson S. Wong
  • Publication number: 20020177899
    Abstract: A method of loading a shape memory, superelastic (or pseudoelastic) stent onto an insertion catheter by cooling the stent to its martensite state with a spray of refrigerant, cold gas, or expanding gas. The stent may then be loaded onto the delivery catheter without the force necessary to deform the stent through the formation of stress induced martensite.
    Type: Application
    Filed: July 8, 2002
    Publication date: November 28, 2002
    Inventors: Jay J. Eum, Paul W. Mikus, Gregory L. Kelly
  • Publication number: 20020151967
    Abstract: A stent system and method for use in the prostate gland. The stent is made of a shape memory alloy such as nitinol, and has a low temperature martensite state, with a martensite transition temperature below body temperature, and a high temperature austenite state, with an austenite transition temperature at or above body temperature, and a memorized shape in the high temperature austenite state which is a helical coil of diameter large enough to hold the prostatic urethra open. The stent is used to heat the prostate and is left in the prostatic urethra while the prostate heals. After the prostate is substantially healed, the stent is cooled to its martensite state and is easily removed from the urethra.
    Type: Application
    Filed: February 28, 2002
    Publication date: October 17, 2002
    Inventors: Paul W. Mikus, William G. Moseley, Jay J. Eum
  • Patent number: 6413269
    Abstract: A stent delivery catheter. The catheter includes an inner catheter tube and an outer catheter tube which are rotatable relative to each other. The inner catheter and outer catheter include recesses to receive the ends of the stent, permitting pull wires to engage the stent ends without need to for the pull wires to extend radially beyond the bounds of the catheter or requiring the stent ends to protrude it into the lumen of the inner or outer catheter.
    Type: Grant
    Filed: July 6, 2000
    Date of Patent: July 2, 2002
    Assignee: Endocare, Inc.
    Inventors: Dennis Bui, Jay J. Eum, Paul W. Mikus
  • Publication number: 20020062129
    Abstract: Two embodiments for a stent delivery catheter are disclosed. In the first embodiment, the stent delivery catheter comprises an outer sheath, a peel-away sheath, and an inner sheath. In the, second embodiment, the stent delivery catheter comprises an outer sheath and an inner tubular member which distally ends in a tongue having an arcuate cross section.
    Type: Application
    Filed: March 20, 2001
    Publication date: May 23, 2002
    Inventors: Paul W. Mikus, Jay J. Eum, Dennis Bui, Gregory Kelly
  • Publication number: 20020035391
    Abstract: A stent delivery system for use in placing a stent within the prostatic urethra and ensuring that the stent does not interfere with the closure of the bladder neck sphincter. The delivery system includes a catheter with an anchor which anchors the catheter within the urethra and ensures placement of the stent at a predetermined distance from the bladder neck sphincter. For use with shape memory stents, the catheter includes a warming fluid system in which the endoscope used in the procedure can act as a fluid supply line and as valve spool to control the flow or warming fluid to the stent.
    Type: Application
    Filed: September 4, 2001
    Publication date: March 21, 2002
    Inventors: Paul W. Mikus, Jay J. Eum
  • Publication number: 20020022832
    Abstract: The cryoprobe assembly includes a cryoprobe and an outer sheath assembly detachably connected thereto. The cryoprobe includes: a Joule-Thomson nozzle; a high pressure gas supply line for supplying gas to the Joule-Thomson nozzle; a heat exchanger interposed between the high pressure gas supply line and the Joule-Thomson nozzle; a cryoprobe sheath containing the heat exchanger and Joule-Thomson nozzle, the cryoprobe sheath having an outer surface; and, a handle attached to the first sheath, the handle having a gripping portion directly graspable by an operator and a connecting portion. The outer sheath assembly includes an adapter covering substantially none of the gripping portion of the cryoprobe handle. The adapter is for attachment to the connecting portion. An outer sheath is connected to the adapter and surrounds the outer surface of the cryoprobe sheath wherein the outer sheath provides enhanced protection against any gas leaks.
    Type: Application
    Filed: October 16, 2001
    Publication date: February 21, 2002
    Inventors: Paul W. Mikus, Jay J. Eum
  • Patent number: 6251105
    Abstract: A cryoprobe system with a vented high pressure gas supply line. Venting of the gas supply line upon cut-off of high pressure gas quickens the warming process of the cryoprobe.
    Type: Grant
    Filed: March 31, 1998
    Date of Patent: June 26, 2001
    Assignee: Endocare, Inc.
    Inventors: Paul W. Mikus, Jay J. Eum
  • Patent number: 6221081
    Abstract: Two embodiments for a stent delivery catheter are disclosed. In the first embodiment, the stent delivery catheter comprises an outer sheath, a peel-away sheath, and an inner sheath. In the second embodiment, the stent delivery catheter comprises an outer sheath and an inner tubular member which distally ends in a tongue having an arcuate cross section.
    Type: Grant
    Filed: May 8, 2000
    Date of Patent: April 24, 2001
    Assignee: Endocare, Inc.
    Inventors: Paul W. Mikus, Jay J. Eum, Dennis Bui, Gregory Kelly
  • Patent number: 6162231
    Abstract: Two embodiments for a stent delivery device are disclosed. In the first embodiment, the stent delivery device comprises an outer sheath and an inner tubular member which distally ends in a tongue having an arcuate cross section. In a second embodiment, the stent delivery device further comprises a housing having a lumen extending longitudinally therethrough, the lumen holding the inner tubular member. A guide pin attached to the outer sheath is slidably disposed within the housing wherein the guide pin may be longitudinally displaced with respect to the lumen. In addition, an endoscope mounting plate may be slidably disposed along the housing. Detents may be used to releasably prevent a proximal displacement of the guide pin within the lumen of the housing as well as to releasably prevent the proximal displacement of the endoscope mounting plate with respect to the housing.
    Type: Grant
    Filed: June 21, 1999
    Date of Patent: December 19, 2000
    Assignee: Endocare, Inc.
    Inventors: Paul W. Mikus, Jay J. Eum
  • Patent number: 6146378
    Abstract: A placement guide for positioning ablation devices within a human body is disclosed. The placement guide comprise an outer catheter and an inner tubular member disposed within a lumen of the outer catheter. When a stop on the inner tubular member engages a seat on the outer catheter, a distal projection of the inner tubular member extends from the distal end of the outer catheter. While monitoring the position of the inner tubular member through an endoscope inserted in its lumen, a clinician positions the distal projection within a human body for optimal ablation. After securing the outer catheter in position, the inner tubular member is withdrawn and replaced with an ablation device which is inserted distally within the outer catheter lumen until a stop on the ablation device engages the seat on the outer catheter wherein a distal projection of the ablation device extends from the distal end of the outer catheter.
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: November 14, 2000
    Assignee: Endocare, Inc.
    Inventors: Paul W. Mikus, Jay J. Eum