Percutaneous device exchange
Inventors
Blacker, Steven J. • Zirps, Christopher
Assignees
Siemens Healthineers Endovascular Robotics Inc
Publication Number
US-12357797-B2
Publication Date
2025-07-15
Expiration Date
2038-03-06
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Abstract
A system and method include operation of a device coupled to a base to hold a catheter to the base, the catheter defining a lumen in which a portion of an elongated medical device is disposed, and a portion of the catheter being disposed in a hemostasis valve, movement of the base relative to the hemostasis valve along a first path while the catheter is held to the base such that the catheter moves relative to the hemostasis valve, and operation of a mechanism coupled to the base to maintain a position of the elongated medical device within the lumen relative to the hemostasis valve while the base and the mechanism are moved along the first path and the catheter is held to the base.
Core Innovation
The invention relates to a system and method for exchanging percutaneous devices during catheter-based intervention procedures. It includes a device coupled to a base that holds a catheter, which contains a portion of an elongated medical device such as a guidewire within its lumen. The system moves the base relative to a hemostasis valve or anatomical feature along a defined path, simultaneously maintaining the position of the distal portion of the elongated medical device fixed relative to the anatomy while the catheter is moved.
The problem addressed by the invention arises during catheter exchange procedures, where maintaining the distal end of an elongated medical device like a guidewire in a fixed anatomical position is critical while withdrawing or advancing catheters. Manual methods require an operator to apply counterpressure to maintain the guidewire position, which may be imprecise or inefficient. The invention automates this process by coordinating movement of the catheter holding base with mechanisms that maintain the elongated medical device position, facilitating the exchange of catheters such as balloon catheters and stent catheters without displacing the guidewire.
The system also contemplates both rapid exchange devices with a monorail portion receiving the guidewire over a fixed length, and over-the-wire catheters where the guidewire lumen extends the catheter length. The mechanism includes clamps, wheels, or other drive elements coupled with robotic arms or slides that provide multiple degrees of freedom to move and hold devices precisely, ensuring the distal guidewire position remains substantially fixed relative to anatomical features, hemostasis valves, or the patient during device exchange.
Claims Coverage
The independent claims focus on methods and apparatuses for manipulating a catheter and maintaining the position of an elongated medical device during catheter exchange procedures.
Maintaining distal portion of elongated medical device fixed relative to anatomical feature
Operating a device coupled to a base to hold a catheter defining a lumen for the elongated medical device; moving the base relative to an anatomical feature along a first path; and operating a mechanism coupled to the base to maintain the distal portion of the elongated medical device in a substantially fixed location relative to the anatomical feature while moving.
Mechanism for maintaining device position using clamps with leapfrog movement
Including a first clamp and a second clamp coupled to the base, the first clamp movable from a first position intermediate the second clamp and anatomical feature to a second position where the second clamp is intermediate the first clamp and the anatomical feature to maintain the elongated medical device position.
Mechanism including pair of wheels to move the base relative to the elongated medical device
Utilizing a pair of wheels operatively moving the elongated medical device relative to the base while the base moves along the first path to maintain the device position fixed relative to anatomy.
The independent claims cover methods and apparatuses that move a catheter while maintaining the position of an elongated medical device relative to an anatomical feature by employing mechanisms such as clamps and drive wheels coupled to a base which moves relative to the anatomical feature along a defined path.
Stated Advantages
Maintains the distal end of an elongated medical device in a substantially fixed position relative to an anatomical feature during catheter exchange.
Enables robotic or automated movement of catheters relative to hemostasis valves with precise control to avoid displacement of guidewires.
Facilitates efficient exchange of percutaneous devices such as balloon and stent catheters, reducing manual intervention.
Supports both rapid exchange and over-the-wire catheter platforms.
Includes mechanisms that provide multi-degree freedom movement, enhancing maneuverability and positioning.
Documented Applications
Percutaneous catheter-based intervention procedures such as angioplasty and stent placement in cardiovascular disease treatment.
Exchange of balloon catheters and stent catheters while maintaining guidewire position.
Use in robotic catheter systems with remote workstations and imaging systems assisting positioning within vasculature.
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