48 results about "Percutaneous techniques" patented technology

A system is provided comprising an optically-guided catheter having a proximal end, a distal end, and at least one lumen. A light-emitting means is coupled to the catheter, the catheter is inserted into place in the patient, and light is emitted as a point or points from a selected location, usually the distal tip, of the catheter to which it is coupled. The system further comprises an external detection device that detects the transdermally projected light, emitted by the light-emitting point from within the patient, thereby indicating precise placement of the catheter within the patient.

The present invention expands a spinal canal by drilling a cylindrical passage in each pedicle of a vertebra, making a circumferential pedicle cut (osteotomy) through each pedicle from within the passage, separating each pedicle cut by inserting an implant into the passage which distracts the pedicle cut to expand the spinal canal, and securing each pedicle cut, allowing the vertebra to heal with the spinal canal expanded. The implant includes an outer sleeve, an inner bolt, and expandable flanges. The outer sleeve includes an upper portion and a lower portion, with the expandable flanges connected to the lower portion and housed within the upper portion. Rotation of the inner bolt causes the upper and lower portions of the outer sleeve to separate, causing the pedicle cut to widen and the expandable flanges to radially extend into and stabilize the widened pedicle cut to effectuate expansion of the spinal canal.

A leaflet clip has an elongated member including a proximal end portion and a distal end portion, and first and second clipping arms movable between an open position and a closed position. The clipping arms include respective proximal end portions coupled to the proximal end portion of the elongated member, and respective distal end portions extending distally and radially outward relative to the elongated member. The leaflet clip further includes a tubular member coaxially disposed about the elongated member. Axial motion of the tubular member with respect to the elongated member or axial motion of the elongated member with respect to the tubular member causes corresponding movement of the clipping arms between the open and closed positions.

A percutaneous nephroscope comprises a bridge assembly, a puncture needle, a sheath assembly and a lens assembly, wherein the bridge assembly is provided with a bridge passage and a bridge base, and the sheath assembly is provided with a sheath passage and a sheath base arranged on the end of the sheath passage. In the step of puncture, the front end of the puncture needle is inserted into and extends out of the sheath passage, and the end of the puncture needle abuts against the sheath base; when the sheath base is tightly connected with the bridge base, the sheath passage communicates with the bridge passage, and the lens assembly sequentially passes through the bridge passage and the sheath passage. The percutaneous nephroscope has the following advantages: (1) the operating procedure is simplified, the time of an operation can be shortened, the requirement on the endurance of patients is decreased, and the working intensity of doctors can be decreased; (2) particularly, unnecessary expansion which can cause the pain and tissue injuries of patients is reduced; (3) because the diameter of the sheath is small, the percutaneous nephroscope can be flexibly operated in the narrow spaces of the renal pelvis and the renal calyx, the risk of tearing kidney tissues is reduced, and moreover, the surgical cut is small and can easily heal up after the operation.