Abstract: Embodiments relate to an accumulator-based phase memory. An aspect includes a phase correction calculator configured to, based on receipt of a new frequency tuning word on a frequency tuning word input, determine a phase difference between the new frequency tuning word and a current frequency tuning word, and determine a product of the phase difference and a value of a counter. Another aspect includes wherein the accumulator-based phase memory determines a phase offset value based on the product of the phase difference and the value of the counter. Another aspect includes the accumulator-based phase memory further comprising a waveform generator configured to generate a waveform based on the new frequency tuning word and the phase offset value.

Abstract: A balloon catheter for dilation of stenotic tissue within a tubular member of the body such as a blood vessel provides fluid flow such as blood flow through the balloon while it is being inflated and after it has been inflated. For valvuloplasty applications or for predilitation prior to a TAVI procedure the balloon is placed across the stenotic aortic valve leaflets and inflated to push the leaflets aside to create a greater blood flow area or allow improved subsequent passage of the large TAVI catheter across the stenotic aortic valve leaflets. As the balloon is inflated in diameter, it is required to reduce in length; this length reduction causes a braided inner tubing to also reduce in length. The braided inner tube is thereby required it to increase in diameter during the balloon inflation and create a suitably large blood flow path through the inner tubing.

Abstract: A balloon or self expandable endoprosthesis formed of a single or multiple joined stent sections. Each section has a node and strut structure extending throughout in order to uncouple expansion forces of the stent to hold a blood vessel outward from crush forces that resist the formation of an oval shape during crush deformation. The hinge can bend in the direction of a uniformly curved surface of the stent but not in the radial direction. The strut can bend in the radial direction but not in the uniformly curved surface of the stent. The widths, lengths, and radial dimensions of the hinges and struts provide a balloon-expandable hinge stent that is non-crushable. For a self-expanding stent the hinge and strut dimensions provide expansion forces that are controlled independently from crush forces. Expansion properties are determined by the hinge dimensions and crush properties are determined independently by strut dimensions.

Abstract: A balloon or self expandable endoprosthesis formed of a single or multiple joined stent sections. Each section has a node and strut structure extending throughout in order to uncouple expansion forces of the stent to hold a blood vessel outward from crush forces that resist the formation of an oval shape during crush deformation. The hinge can bend in the direction of a uniformly curved surface of the stent but not in the radial direction. The strut can bend in the radial direction but not in the uniformly curved surface of the stent. The widths, lengths, and radial dimensions of the hinges and struts provide a balloon-expandable hinge stent that is non-crushable. For a self-expanding stent the hinge and strut dimensions provide expansion forces that are controlled independently from crush forces. Expansion properties are determined by the hinge dimensions and crush properties are determined independently by strut dimensions.

Abstract: A balloon catheter for dilation of stenotic tissue within a tubular member of the body such as a blood vessel provides fluid flow such as blood flow through the balloon while it is being inflated and after it has been inflated. For valvuloplasty applications or for predilitation prior to a TAVI procedure the balloon is placed across the stenotic aortic valve leaflets and inflated to push the leaflets aside to create a greater blood flow area or allow improved subsequent passage of the large TAVI catheter across the stenotic aortic valve leaflets. As the balloon is inflated in diameter, it is required to reduce in length; this length reduction causes a braided inner tubing to also reduce in length. The braided inner tube is thereby required it to increase in diameter during the balloon inflation and create a suitably large blood flow path through the inner tubing.

Abstract: The Access guide catheter provides passage for therapeutic and diagnostic devices through vessels or conduits that return substantially in a direction from which they originated. One application is for delivery of therapeutic catheters to the carotid or cerebral arteries via access from the radial or brachial artery. The guide catheter enters the aorta from one of the great vessels, forms a closed loop in the aorta, and is directed back into a great vessel in an opposed direction. The distal portion of the guide catheter is advanced into the great vessel for support. Further support is attained by providing tension to the proximal shaft of the guide catheter. Flexibility of the guide catheter allows diagnostic angiograms to be performed prior to delivery of a therapeutic catheter or device.

Abstract: An expandable introducer sheath can actively be induced to reduce in diameter or enlarge in diameter due to a braided internal structure that has axial strands connected to its distal end. The introducer sheath is delivered to the blood vessel or other tubular member of the body in a smaller diameter configuration with the axial strands in compression. The catheter is flexible and can be delivered to eccentrically shaped and tortuous vessels. Once the catheter is in position, the axial strands are placed into tension to cause the introducer sheath to assume a larger diameter configuration that will help straighten out tortuous vessels. The access site into the blood vessel is expanded via a radial expansion that is less traumatic. Passage of a larger interventional catheter can proceed through the larger diameter sheath configuration.

Abstract: A peripheral stent with individual segments reduces the occurrence of fatigue fracture failure seen in vessels and tubes having bending and twisting movement. Segments can be attached via connecting fibers that biodegrade and offer the segments freedom of movement. The segments are balloon-expandable but will not be crushed by external forces placed upon the stent. Hinges and struts provide the stent with a plastic deformation during expansion and remain elastic if exposed to an oval shape. The segments overlap each other to provide improved scaffolding of the vessel wall and a greater flexibility during delivery. A composite stent having both balloon-expandable and self-expanding character has application in the venous system.

Abstract: The Access guide catheter provides passage for therapeutic and diagnostic devices through vessels or conduits that return substantially in a direction from which they originated. One application is for delivery of therapeutic catheters to the carotid or cerebral arteries via access from the radial or brachial artery. The guide catheter enters the aorta from one of the great vessels, forms a closed loop in the aorta, and is directed back into a great vessel in an opposed direction. The distal portion of the guide catheter is advanced into the great vessel for support. Further support is attained by providing tension to the proximal shaft of the guide catheter. Flexibility of the guide catheter allows diagnostic angiograms to be performed prior to delivery of a therapeutic catheter or device.

Abstract: A non-contact seat position system is provided. The system includes a lower seat track, an upper seat track, a target and a sensor. The upper seat track is positionably connected to the lower seat track, whereby the upper seat track may be positioned into a desirable location. The target is connected either to the lower seat track or the upper seat track, and the sensor is connected to the other of the lower seat track and the upper seat track. The sensor has a line of sight with the target, wherein the sensor when powered, outputs a sensor signal determined from a reflected signal coming from the target. In a first embodiment of the system, the sensor is an infrared sensor. In a second embodiment of the system the sensor is an optical sensor. A method of non-contact seat position system determination is also provided.