摘要:
An electrically activated surgical device includes a probe body, an active element and a structure for selectively electrically insulating and/or physically isolating the active element from the patient's tissue when the device is in use. The probe body defines an outer surface, a proximal end, a distal end and a window defined within the outer surface near or at the distal end. The active element is electrically connected to a power source and is configured to selectively assume a non-deployed configuration and a variable deployed configuration in which the active element at least partially emerges from the window out of the probe body. The insulating structure selectively insulates the active element from the patient's tissue when the device is inserted therein. In operation, a physician inserts the probe into the tissue, insulates the active element from the tissue (either before, during or after insertion of the probe), energizes the insulated active element using for example, radiofrequency (RF) power from the power source, and only then exposes the energized active element to the tissue. By insulating the active element during the energizing thereof, little or no current applied to the active element is dissipated in the patient's tissue, thus decreasing the time required to energize the active element and enabling lower and safer power levels to be applied to the active element during the energizing thereof.
摘要:
There is provided a device and a method for irradiating vascular tissues. The device generally includes a transfer device having a first chamber and a second chamber and a piston slidably disposed between the chambers. A ballon catheter is provided for positioning witin the vascular system and is connected to the transfer device such that an inflation lumen of the balloon catheter is in fluid communication with the second chamber. A proximal end of the balloon catheter is affixed to a mounting block which is configured to receive the transfer device. An inflation device is provided to force fluid into the first chamber such that the piston is driven to force a radioactive fluid contained in the second chamber into the balloon.
摘要:
An expandable and collapsible isolation bag having at least two layers which are bonded together at a plurality of connection sites distributed over a surface of the bag and a system for supplying a fluid between the two layers and opening the isolation bag. The two layers preferably include polyurethane film and the bag may further include a lubricous outer surface, such as a nylon mesh layer, bonded to the polyurethane film. A neck channel may be formed around the openable end of the isolation bag for supporting a drawstring which is movable through the neck channel to close the open end of the bag. The bag can be made by bonding the nylon mesh layer to two layers of polyurethane film using a radio frequency welder to form a plurality of weld sites distributed across the surface of the laminate. The drawstring is then introduced into the neck channel. The finished laminate with the drawstring is welded to form a bag assembly having an opening at one end. A neck portion of the bag assembly is then connected to a bag coupling on the end of the hollow rod. A compressive band of heat-shrinkable material may be used to secure the bag assembly on the rod. A handle assembly is bonded to the rod and the drawstring is threaded through a slidable seal between the rod and an injection tube. The end of the drawstring is connected to a movable portion of the handle or to a pulling ring.
摘要:
Embodiments isolate exposed surfaces to increase the effectiveness of different treatment modalities. Embodiments isolate hollow spaces within the body to increase the effectiveness of ultrasound energy and/or other treatments. Such hollow spaces within the body may include nasal surfaces, and recessed or sequestered surfaces, e.g. sinus cavity surfaces or other anatomical structures, such as upper and lower gastrointestinal tract, airways, uterine and vaginal cavities and the anorectal canal, for example. Isolating the area to be treated reduces the volume of the enclosed and delimited space and reduces the tissue surface against which the ultrasound and/or biologically active substances act. For example, isolating a hollow passageway within the body enhances the effectiveness of ultrasound within the isolated space, and constrains the biologically active fluid and/or the gel or fluid configured to conducts the ultrasonic energy from the emitter thereof (e.g., an ultrasound waveguide) to the surfaces to be treated.
摘要:
There is provided a device and a method for irradiating vascular tissues. The device generally includes a transfer device having a first chamber and a second chamber and a piston slidably disposed between the chambers. A balloon catheter is provided for positioning within the vascular system and is connected to the transfer device such that an inflation lumen of the balloon catheter is in fluid communication with the second chamber. A proximal end of the balloon catheter is affixed to a mounting block which is configured to receive the transfer device. An inflation device is provided to force fluid into the first chamber such that the piston is driven to force a radioactive fluid contained in the second chamber into the balloon.