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公开(公告)号：US10960181B2
公开(公告)日：2021-03-30
申请号：US16046376
申请日：2018-07-26
Inventor： Michael C. Bednarek , Eric J. Wilkowske , Richard E. Stehr , William E. Butler
Abstract: An apparatus for imparting a tensile force to deflect a distal portion of a catheter while maintaining its exterior dimensions may include a handle grip including a cross-section of generally predetermined exterior dimensions, and a longitudinal axis. A flexible elongate member may include proximal and distal end portions, with the proximal end portion being coupled to the handle grip. An adjustment knob may include a cross-section of generally predetermined exterior dimensions, and is rotatably coupled to the handle grip around the longitudinal axis. An elongate deflection member may be operably coupled to the adjustment knob and to the distal end portion of the elongate member. Rotation of the adjustment knob may impart a tensile force to the deflection member thereby causing the distal end portion of the elongate member to deflect from a prior configuration while maintaining the generally predetermined exterior dimensions of the handle grip and the adjustment knob.
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2.发明授权公开(公告)号：US10912923B2
公开(公告)日：2021-02-09
申请号：US16152127
申请日：2018-10-04
Inventor： Wayne Heideman , Allan M. Fuentes , Richard E. Stehr , Sarah Cumming , Mark Dustrude
Abstract: A catheter assembly includes an inner liner made of flexible material and an outer layer having a steering mechanism. The steering mechanism includes at least one flat wire and a corresponding lumen through which the flat wire may travel. The steering mechanism may also include at least one pull ring to which the flat wires are attached. A layer of heat shrink material may encompass the outer layer. A braided wire assembly may also be provided in the outer layer, and may be formed by braiding a plurality of flat wires into a wire mesh. The overall cross-section of the catheter assembly is preferably substantially circular. A catheter shaft may include a plurality of segments of differing hardness characteristics. The outer layer typically comprises a melt processing polymer such that the catheter assembly may be laminated using heat.
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公开(公告)号：US20190015633A1
公开(公告)日：2019-01-17
申请号：US16046376
申请日：2018-07-26
Inventor： Michael C. Bednarek , Eric J. Wilkowske , Richard E. Stehr , William E. Butler
Abstract: An apparatus for imparting a tensile force to deflect a distal portion of a catheter while maintaining its exterior dimensions may include a handle grip including a cross-section of generally predetermined exterior dimensions, and a longitudinal axis. A flexible elongate member may include proximal and distal end portions, with the proximal end portion being coupled to the handle grip. An adjustment knob may include a cross-section of generally predetermined exterior dimensions, and is rotatably coupled to the handle grip around the longitudinal axis. An elongate deflection member may be operably coupled to the adjustment knob and to the distal end portion of the elongate member. Rotation of the adjustment knob may impart a tensile force to the deflection member thereby causing the distal end portion of the elongate member to deflect from a prior configuration while maintaining the generally predetermined exterior dimensions of the handle grip and the adjustment knob.
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4.发明申请公开(公告)号：US20180207322A1
公开(公告)日：2018-07-26
申请号：US15903965
申请日：2018-02-23
Inventor： Xiaoping Guo , Richard E. Stehr
CPC classification number: A61L29/049 , A61M25/00 , A61M25/0021 , A61M2025/0048 , A61M2025/006 , A61M2025/0062 , C08L83/04
Abstract: The invention comprises self-lubricating polymer compositions that are especially useful in medical devices and valves and gaskets of medical devices. In a preferred embodiment, the polymer compositions comprise a thermosetting or thermoplastic silicone elastomer in combination with a lubricity enhancing polyfluoropolyether fluid or hydrocarbon-based synthetic oil. In other preferred embodiments, the polymer compositions contain only biocompatible components. The improved anti-friction properties of the self-lubricating polymers can be demonstrated over a course of insertion and withdrawal cycles, where conventional polymers have changing and mostly increasing force required for each insertion and withdrawal, while the polymer compositions of the invention remain stable.
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公开(公告)号：US09987463B2
公开(公告)日：2018-06-05
申请号：US15140750
申请日：2016-04-28
Inventor： Xiaoping Guo , Richard E. Stehr
IPC: A61M25/00 , B29C61/00 , B29D23/00 , A61M25/01 , B29C47/02 , B29C63/00 , B29L31/00 , B29K27/18 , B29K105/16
CPC classification number: A61M25/005 , A61M25/0009 , A61M25/0012 , A61M25/0043 , A61M25/0045 , A61M25/0108 , A61M2025/0059 , A61M2205/32 , B29C47/021 , B29C61/006 , B29C63/0069 , B29D23/001 , B29K2027/18 , B29K2105/16 , B29L2031/7542
Abstract: A method of manufacturing a catheter shaft includes the steps of forming an inner layer of a first polymeric material, forming a plait matrix layer including a second polymeric material about the inner layer, and forming an outer layer of a third polymeric material about the plait matrix layer. The plait matrix layer includes a braided wire mesh partially or fully embedded within the second polymeric material, which is different from at least one of the first polymeric material forming the inner layer and the third polymeric material forming the outer layer. The second polymeric material has a higher yield strain and/or a lower hardness than at least the first polymeric material, and preferably both the first and the third polymeric materials. The first polymeric material and the third polymeric material may be different or the same. The catheter shaft may be formed by stepwise extrusion, co-extrusion, and/or reflow processes.
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Patent Agency Ranking
6.发明授权公开(公告)号：US09931440B2
公开(公告)日：2018-04-03
申请号：US15594165
申请日：2017-05-12
Inventor： Xiaoping Guo , Richard E. Stehr
CPC classification number: A61L29/049 , A61M25/00 , A61M25/0021 , A61M2025/0048 , A61M2025/006 , A61M2025/0062 , C08L83/04
Abstract: The invention comprises self-lubricating polymer compositions that are especially useful in medical devices and valves and gaskets of medical devices. In a preferred embodiment, the polymer compositions comprise a thermosetting or thermoplastic silicone elastomer in combination with a lubricity enhancing polyfluoropolyether fluid or hydrocarbon-based synthetic oil. In other preferred embodiments, the polymer compositions contain only biocompatible components. The improved anti-friction properties of the self-lubricating polymers can be demonstrated over a course of insertion and withdrawal cycles, where conventional polymers have changing and mostly increasing force required for each insertion and withdrawal, while the polymer compositions of the invention remain stable.
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7.发明申请公开(公告)号：US20170321054A1
公开(公告)日：2017-11-09
申请号：US15602979
申请日：2017-05-23
Inventor： Xiaoping Guo , David P. Johnson , Richard E. Stehr
CPC classification number: C08L69/00 , C08G69/40 , C08K5/353 , C08L33/10 , C08L77/02 , C08L77/06 , C08L77/10 , C08L2666/20
Abstract: The invention relates to biocompatible polycarbonate/polyamide polymer compositions for use in medical and surgical devices. Additional additives, crosslinking agents, phosphites, and optionally a radiopaque filler or fillers can be used to produce the high performance compositions desired. The polymer compositions have improved melt processability along with balanced or enhanced physical and mechanical properties, especially when combined or over-extruded onto or covering other polymer layers, such as soft and/or flexible layers commonly used in medical device applications and catheter tips, for example. The ability to incorporate radiopaque compounds into these polymer compositions during melt processing offers improved methods for monitoring and visualizing medical devices when used inside the body and as well as improving the operating characteristics of the medical device components
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公开(公告)号：US20170312482A1
公开(公告)日：2017-11-02
申请号：US15615255
申请日：2017-06-06
Inventor： Clint Schneider , Joshua L. Dudney , Richard E. Stehr , Troy T. Tegg , Michael C. Bednarek , Guy P. Vanney , James A. Jensen , Michael W. Stine
IPC: A61M25/01
Abstract: The present invention is a catheter actuation handle for deflecting a distal end of a tubular catheter body, the handle including an auto-locking mechanism. The handle comprises upper and lower grip portions, an actuator, and an auto-locking mechanism. The auto-locking mechanism is adapted to hold a deflected distal end of the catheter in place without input from the operator. When the distal end of the catheter is deflected from its zero position, it typically will seek a return to its zero position, and as a result exerts a force on the actuator. The auto-locking mechanism acts by providing a second force that resists this force from the distal end and holds the distal end in place. As a result, the operator does not need to maintain contact with the buttons to maintain the distal end 18 in a set position once placed there by actuating the actuator.
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公开(公告)号：US09694159B2
公开(公告)日：2017-07-04
申请号：US14311525
申请日：2014-06-23
Inventor： Clint Schneider , Joshua L. Dudney , Richard E. Stehr , Troy T. Tegg , Michael C. Bednarek , Guy P. Vanney , James A. Jensen , Michael W. Stine
CPC classification number: A61M25/0136 , A61M25/0147 , A61M2025/0186
Abstract: The present invention is a catheter actuation handle for deflecting a distal end of a tubular catheter body, the handle including an auto-locking mechanism. The handle comprises upper and lower grip portions, an actuator, and an auto-locking mechanism. The auto-locking mechanism is adapted to hold a deflected distal end of the catheter in place without input from the operator. When the distal end of the catheter is deflected from its zero position, it typically will seek a return to its zero position, and as a result exerts a force on the actuator. The auto-locking mechanism acts by providing a second force that resists this force from the distal end and holds the distal end in place. As a result, the operator does not need to maintain contact with the buttons to maintain the distal end 18 in a set position once placed there by actuating the actuator.
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公开(公告)号：US11376397B2
公开(公告)日：2022-07-05
申请号：US16661145
申请日：2019-10-23
Inventor： Troy T. Tegg , Richard E. Stehr , Alan M. Fuentes , Linda Kay Nemec
Abstract: A method of manufacturing a catheter assembly generally includes providing a catheter shaft having an outer layer and an inner reinforcing layer; removing at least a portion of the outer layer from a length of the distal end of the catheter shaft in order to expose a distal segment thereof; providing an inner jacket segment; axially engaging the inner jacket segment with an interior surface of the distal segment of the catheter shaft; providing an outer jacket segment around at least the exposed exterior region of the distal segment of the catheter shaft; and bonding the distal segment of the catheter shaft to the inner jacket segment and the outer jacket segment.
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