Patent
Thermal angioplasty system
Reads0
Chats0
TLDR
In this article, an isolation transformer is used to provide RF power and the sensor signals are optically coupled to provide increased electrical isolation for the patient, and the current drawn from the battery is compared to a predetermined current level and if exceeded, a fault signal is generated.Abstract:
A system for thermal angioplasty provides electrical power to a heating coil located inside a dilatation balloon, receives a signal from a sensor at the coil indicating its temperature and also receives signals from balloon sensors indicating the temperature at their respective positions. An isolation transformer is used to provide RF power and the sensor signals are optically coupled to provide increased electrical isolation for the patient. The heating coil temperature sensor signal is compared to high and low temperature limits and if either is exceeded, a fault signal is generated. The sensor signals from the balloon are compared to predetermined high temperature limits and if exceeded, fault signals are generated. The current drawn from the battery is compared to a predetermined current level and if exceeded, a fault signal is also generated. Upon generation of any of the fault signals, the electrical power to the heating coil is interrupted by fault detection circuitry. An RF ON reset switch is provided to prevent the inadvertent application of RF power to the heating coil. Materials used in the connectors and in the RF generator for connections to the catheter electrical leads are compatible with those leads to avoid a thermocouple effect.read more
Citations
More filters
Patent
Method and system for controlling output of RF medical generator
Steven Paul Buysse,Bret Felton,David N. Heard,David Keppel,Ronald J. Podhajsky,Dale Francis Schmaltz,Robert H. Wham,Edward C. Meagher,Kate Ryland Lawes,David A. Schechter,Chelsea Shields,Philip M. Tetzlaff,Jeremy S. James +12 more
TL;DR: In this article, a closed-loop control system for an electrosurgical generator that generates electrosurgery energy is described, which includes a user interface for selecting at least one pre-surgical parameter, such as the type of surgical instrument operatively connected to the generator, type of tissue and the desired surgical effect.
Patent
System and method for closed loop monitoring of monopolar electrosurgical apparatus
James H. Orszulak,Robert H. Wham +1 more
TL;DR: In this article, an electrosurgical system is described comprising a generator configured to electrosurgery coagulation waveforms, which includes a closed loop control system for controlling the electrosure coagulated waveforms.
Patent
Tuned rf energy and electrical tissue characterization for selective treatment of target tissues
Corbett W. Stone,Michael F. Hoey,Tom A. Steinke,Raphael M. Michel,Arthur G. Blanck,Marlene Kay Truesdale,Bret Herscher +6 more
TL;DR: A catheter and catheter system can use energy tailored for remodeling and/or removal of target material along a body lumen, often of atherosclerotic material of a blood vessel of a patient as discussed by the authors.
Patent
Selectable Eccentric Remodeling and/or Ablation of Atherosclerotic Material
TL;DR: In this paper, a catheter and catheter system for eccentric remodeling and/or removal of atherosclerotic material of a blood vessel of a patient include an elongate flexible catheter body with a radially expandable structure.
Patent
Methods and apparatus for performing a non-continuous circumferential treatment to a body lumen
Denise Demarais,Hanson S. Gifford,Nicolas Zadno,Mark Deem,Benjamin J. Clark,Andrew Wu,Kenneth J. Michlitsch +6 more
TL;DR: In this article, a non-continuous circumferential treatment of a body lumen is described, where an apparatus is used to deliver energy at a first lengthwise and angular position within the lumen to create a less-than-full treatment zone at the first position.
References
More filters
Patent
Urethral inserted applicator for prostate hyperthermia
TL;DR: In this article, a urethral inserted applicator for prostate hyperthermia includes a multi-tube, balloon type catheter, which includes first and second closed end fluid dry tubes, respectively, for a helical coil electrode type applicator, and an electromagnetic field compatible temperature sensor for measuring the temperature of the prostate tissue.
Patent
Method and apparatus for angioplasty
TL;DR: The region surrounding the balloon utilized in percutaneous transluminal coronary angioplasty is heated by means within the balloon or within the skin of the balloon upon inflation of balloon such that disrupted tissues of the plaque in the arterial wall are heated in order to fuse together fragmented segments of tissue and to coagulate blood trapped within dissected planes of tissue.
Patent
Heatable dilation catheter
TL;DR: A heatable dilation catheter includes an elongated flexible catheter which has an inflatable balloon attached to its distal end as discussed by the authors, and the balloon has a heating element attached to it.
Patent
Automatic over-temperature control apparatus for a therapeutic heating device
TL;DR: In this article, an over-temperature control for heat lesion generation equipment in the case of neurosurgery is presented. But the system is a hybrid between a purely manually controlled radio frequency heating unit and a completely automatic controlling radio frequency unit, the latter being such that it automatically raises the radio frequency power and feedbacks on a set temperature to stabilize the final electrode temperature.
Patent
Device and method for heating tissue in a patient's body
TL;DR: In this paper, a balloon is mounted on the catheter shaft and filled with an electrically conductive fluid, two or more electrical contacts enclosed within the chamber, a power supply for applying an electrical potential to the contacts, and a two-or more conductors for connecting each of the contacts to the power supply.