摘要:
Devices, systems and methods are provided for electrical stimulation of a body organ, particularly within the gastrointestinal tract. In preferred embodiments, the stomach is the organ within the gastrointestinal tract which is targeted for such stimulation. A guide wire or other delivery device is positioned within the body so as to transect the stomach wall. Devices and systems are then advanced over the guide wire for attachment to the stomach wall. The guide wire may be placed by endoscopic, open, laparoscopic or a modified percutaneous approach. In a modified percutaneous approach, the stomach is accessed without the use of general anesthesia by advancing a needle through the abdomen, transecting the stomach wall with the needle and advancing the guide wire through the needle. In some embodiments, particularly for use in obese patients, the modified percutaneous approach includes advancing a trocar through the tissue of the patient toward the outer surface of the organ and advancing the needle through the trocar prior to transecting the wall with the needle.
摘要:
Interventional catheter-based systems and methods are described herein for use in generating an initial pathway through vascular occlusions. The catheter systems generally include two elements. A first element is a Blunt Dissection Catheter including a manually actuated assembly located at the distal tip of the Blunt Dissection Catheter that performs blunt dissection in the vascular occlusion to produce a dissection track, or small pathway through the occlusion. The second element is a Sheath Catheter that serves as a conduit within which the Blunt Dissection Catheter is freely advanced, retracted and rotated. The first and second elements are used in some combination to cross vascular occlusions in both the coronary and peripheral vasculature.
摘要:
A catheter system and corresponding methods are provided for accessing a blood vessel true lumen from a sub-intimal plane of the vessel. The catheter system includes visualization elements for determining the orientation of the true lumen with respect to the sub-intimal plane at an identified entry site from a position in the sub-intimal plane. The entry site is distal to a chronic total occlusion (CTO). The catheter system also includes a system for physically securing tissue of the sub-intimal plane at the entry site to the catheter system. The attaching system reduces or eliminates catheter float within the sub-intimal space. The catheter system further includes re-entry devices to establish and maintain a path from the sub-intimal plane back into the vessel true lumen.
摘要:
Apparatus and method is disclosed relating to an infusion catheter for treating a subject region with a treatment solution. A guide catheter allows the infusion catheter to be inserted into the subject and placed near a treatment region within the vascular system. A solution source is used to selectively inflate an infusion device. A passageway in the catheter body extends to an infusion device which has inner and outer chambers. Holes in a wall of the inner chamber route solution into the outer chamber and holes in the wall of the outer chamber route the solution into a subject vasculature. Solution pressure in the inner chamber is greater then the solution pressure in the outer chamber due to the relatively greater area of the holes in the outer chamber wall.
摘要:
A method and system of providing therapy to a patient's uterus. The system has an access tool with a lumen, the access tool being adapted to be inserted through a human cervical canal to place an opening of the lumen within a uterus when the access tool is inserted through the cervical canal; a seal disposed at a distal region of the access tool and adapted to seal the access tool against an interior cervical os; a sealing indicator adapted to provide a user with an indication that the seal has sealed the access tool with the interior cervical os; and a vapor delivery mechanism adapted to deliver condensable vapor through the access tool to the uterus, the condensable vapor being adapted to condense within the uterus.
摘要:
A method and system of providing therapy to a patient's uterus. The method includes the steps of inserting an access tool through a cervix and a cervical canal into the uterus; actively cooling the cervical canal; delivering vapor through the access tool lumen into the uterus; and condensing the vapor on tissue within the uterus. The system has an access tool with a lumen, the access tool being adapted to be inserted through a human cervical canal to place an opening of the lumen within a uterus when the access tool is inserted through the cervical canal; an active cooling mechanism adapted to cool the cervical canal, the active cooling mechanism having a coolant source; and a vapor delivery mechanism adapted to deliver condensable vapor through the access tool to the uterus, the condensable vapor being adapted to condense within the uterus.
摘要:
A method and system of providing therapy to a patient's uterus. The method includes the steps of inserting an access tool through a cervix and a cervical canal into the uterus; actively cooling the cervical canal; delivering vapor through the access tool lumen into the uterus; and condensing the vapor on tissue within the uterus. The system has an access tool with a lumen, the access tool being adapted to be inserted through a human cervical canal to place an opening of the lumen within a uterus when the access tool is inserted through the cervical canal; an active cooling mechanism adapted to cool the cervical canal, the active cooling mechanism having a coolant source; and a vapor delivery mechanism adapted to deliver condensable vapor through the access tool to the uterus, the condensable vapor being adapted to condense within the uterus.
摘要:
Gastric stimulation devices, systems and methods are provided, particularly for stimulating a gastric organ having an internal cavity. Such devices and systems are typically implanted outside of the gastric organ while the environment of the internal cavity is probed and monitored by one or more sensors. The sensor information may be used to affect the stimulation signals provided to the gastric organ by the devices and systems. Such feedback integration assists in providing treatments and stimulation programs that are tailored to the needs of the individual patient.
摘要:
An apparatus for treating occlusions. In one embodiment, the apparatus comprises an outer catheter shaft with at least one axial lumen therethrough, wherein the outer catheter shaft comprises a distal end having an outer diameter, and an inner catheter shaft having an average diameter slidably disposed in the at least one axial lumen of the outer catheter shaft. The inner catheter shaft comprises at least one axial lumen therethrough, and an a traumatic, tapered protuberance comprising a distal end and a proximal end, wherein a diameter of the a traumatic, tapered protuberance tapers upward from the average diameter at the distal end to a greatest diameter at the proximal end. The embodiment further comprises a guidewire slidably disposed in the at least one axial lumen of the inner catheter shaft, wherein the guidewire is advanced through the body lumen into the occlusion. When the outer catheter shaft is advanced distally to closely approach the proximal end of the atraumatic, tapered protuberance, the outer catheter shaft and the inner catheter shaft present a relatively smooth tapering surface to the occlusion such that the outer catheter shaft may enter the occlusion.