摘要:
A radiation source delivery wire has a flexible operating wire member, and an irradiation member including a radiation source for applying radiation to a target portion in a cavity of a living body. The irradiation member including the radiation source is so constructed as to be flexibly bendable, and a distal end portion of the operating wire member constitutes a narrowing portion which gradually narrows toward its distal end.
摘要:
The present invention is a hybrid stent that is defined as having a central section that is balloon expandable and end sections that are self-expanding. The entire stent is mounted on a balloon of a balloon angioplasty catheter. One way to retain the self-expanding portion of the stent onto a balloon onto which it has been nested is to place a cylindrical elastomer tube around each of the self-expanding end sections of the stent. Another way to retain the hybrid stent onto a stent delivery system is to use a conventional sheath that is pulled back to initiate stent deployment
摘要:
An apparatus for use in optimizing radiation dose distributions to a rectum and a bladder of a patient during the treatment of malignancies of female genitalia is provided in accordance with the present invention. The apparatus includes a colpostat intracavitary implant including a housing portion adapted to receive a radiation source therein and a jacket. The jacket defines a cavity sized to receive the housing portion. The jacket is configured to selectively expand in volumetric size to move the rectum and the bladder away from the radiation source.
摘要:
A device for delivering radiation to at least one preselected site in a vascular system of a patient, includes an elongated flexible catheter tube of a diameter for insertion into the patient's vascular system, and a flexible guide wire within the catheter tube and movable along its length. The guide wire includes a proximal end to be located externally of the patient's vascular system for moving the guide wire within the catheter tube, and a rounded distal tip at the opposite end to facilitate movement of the guide wire through the catheter tube. At least one radiation-producing element is fixed to the guide wire at an intermediate location spaced from the rounded distal tip.
摘要:
The therapeutic laser apparatus includes at least two wands connected to a controller and radiation source via fiber optic cables. The controller and source include at least two infrared wavelength solid-state diode (“SSD”) lasers and at least two visible wavelength SSD aiming lasers. The apparatus further includes a combiner configured to maintain the electromagnetic radiation from one infrared SSD laser coincident with one visible light SSD aiming laser. In the method according to the invention, the visible light SSD aiming laser is used as a pointer so that an operator can position the wands adjacent to the skin of a mammal whereby the beams of infrared treatment lasers intersect at a region inside the body of the mammal.
摘要:
An intra-coronary radiation devices containing Ce-144 or Ru-106 deposited onto a wire and coated with a biocompatible material and methods of making and using the same.
摘要:
An apparatus (40) according to the invention includes a radiation emitter (34) for ionizing radiation and a high voltage generator (1) for generating brief voltage pulses for voltage application of electrodes (6, 15, 16, 24) included in the apparatus. The electrodes are designed to be secured at or introduced into tissue in a restricted region of a human or an animal and to form between them an electric field in the tissue. The radiation emitter (34) is provided to emit ionizing radiation to a tumor in the tissue in that region which is to be treated, while the electrodes (6, 15, 16, 24) are disposed to be placed in or at the tumor in order that the electric field pass through the tumor.
摘要:
A radiation device is used in a body lumen for treatment. The radiation device is formed of a sheath to be disposed in the body lumen, and an elongated radiation member. The sheath includes a guide wire passageway to allow a guide wire to pass therethrough, and a sheath passageway extending throughout a substantial portion thereof. The radiation member includes an outer member having a shield portion at a front part thereof, and an inner member slidably situated in the outer member and having a radiation portion at a front part thereof. When the radiation device is used, the sheath is introduced into a body lumen by sliding over the guide wire preliminary placed in the body lumen. Then, the radiation member is inserted into the sheath passageway in a condition such that the radiation portion is located inside the shielding portion. When radiation is required, the radiation portion is disposed outside the shield portion. Since the sheath prevents the radiation member from contacting the body lumen, the radiation member may be reused.
摘要:
The invention is directed to a radiation delivery catheter assembly for maintaining patency of a body lumen for a period of time sufficient to allow delivery of a radiation source to the body lumen. The catheter utilizes an inflatable region which maintains and centers the catheter in the body lumen. The catheter may include a perfusion lumen for supplying oxygenated blood to tissue located downstream from the catheter when the inflatable region is expanded in the body lumen. The inflatable region can be made up of a plurality of balloon segments which help center the radiation source, even if placed on a curved section of the body lumen. Embodiments of the invention include a catheter design which utilizes “rapid exchange” features and a dual therapeutic catheter which is capable of dilating a stenosed region of the body lumen prior to the administration of the radiation treatment. A two-piece protective sheath is used to protect the radiation source from bodily fluids.
摘要:
A brachytherapy device 10 for exposing to radioactivity a patient includes an elongate member such as a needle or cannula 12 adapted for introduction into the patient and also includes a stylet 14 slideably receivable in a longitudinal throughbore 16 in the needle 12. The device 10 also includes a portion 64 near either the proximal end 18 of the needle 12 or the distal end 24 of the stylet 14 which provides a local, defined amount of friction between the needle 12 and the stylet 14. The device 10 further includes an anti-static handle 34 connected to the needle 12. The handle 34 has an interior ramp surface 40 in communication with the throughbore 16 of the needle 12, frustoconical in shape and possessing an included apical angle of at least about 16°. The localized friction portion 64 can be a crimp or flange 48 on the stylet 14, or a crimp 44 or deformation 46 in or of the needle 12. The handle 34 is preferably composed of a polycarbonate, acrylic or acetal resin (such resins preferably being carbon-filled, or otherwise electro static dissipative), or a hydroscopic nylon blend. The device 10 is particularly advantageous in that the preferred ramp surface 40 in the handle 34 facilitates the insertion of seeds 26 of radioactive material and inert spacers 28 into the needle 12. The anti-static handle 34 eliminates, for practical purposes, the previously encountered risks of static interference, static cling of the spacers 28 and ignition spark generation. Finally, the localized friction portion 64 provides a controlled and predetermined amount of friction between the needle 12 and the stylet 14, preventing the stylet 14 from falling from the needle 12, while also preventing or reducing the risk of unintended ejection of the radioactive seeds 26 and spacers 28. Such friction is advantageously provided virtually the entire time any portion of the stylet 14 is received in the needle 12.