Back to results
US 12,364,841 B2Granted
Catheter device
AssigneeAis GmbH Aachen Innovative Solutions
InventorsJoachim Georg Pfeffer, Thomas Schmitz-Rode, Rolf W. Gunther
Life of this patent
Estimating the term…
Abstract
The catheter device comprises a drive shaft connected to a motor, and a rotor mounted on the drive shaft at the distal end section. The rotor has a frame structure which is formed by a screw-like boundary frame and rotor struts extending radially inwards from the boundary frame. The rotor struts are fastened to the drive shaft by their ends opposite the boundary frame. Between the boundary frame and the drive shaft extends an elastic covering. The frame structure is made of an elastic material such that, after forced compression, the rotor unfolds automatically.
Claims37
A method comprising:
- placing an intravascular blood pump device inside a body of a patient, the intravascular blood pump device including:
- a catheter having a proximal end and a distal end;
- a pump head disposed distal of the distal end of the catheter, the pump head having a longitudinal axis extending from a proximal end of the pump head to a distal end of the pump head, the pump head configured to take a compressed state and an expanded state, the pump head having a first radius from the longitudinal axis to an inner wall of the pump head in the expanded state and a second radius from the longitudinal axis to an inner wall of the pump head in the compressed state, wherein the pump head is configured to automatically elastically expand into the expanded state upon release from the catheter;
- a rotor disposed in the pump head and sharing the longitudinal axis of the pump head, the rotor comprising a frame structure forming at least one impeller blade and comprising a boundary frame forming a radial edge of the at least one impeller blade, the at least one impeller blade being elastically compressible and configured to automatically elastically expand to an operational state, wherein in the operational state the at least one impeller blade extends a first distance radially outward from the longitudinal axis of the pump head to the boundary frame forming the radial edge of the at least one impeller blade, wherein the at least one impeller blade is configured to convey a fluid;
- wherein in the expanded state of the pump head, the first radius of the pump head is longer than the first distance of the at least one impeller blade, forming a radial clearance gap between the boundary frame of the impeller blade and the pump head, wherein the radial clearance gap is constant during operation of the pump;
- wherein in the compressed state the inner wall of the pump head is in contact with the boundary frame of the at least one impeller blade;
- and
- pumping blood through the patient's body, using the at least one impeller blade.
5 more elements
A method comprising:
- placing an intravascular blood pump device inside a body of a patient, the intravascular blood pump device including:
- a catheter having a proximal end and a distal end;
- a pump head disposed distal of the distal end of the catheter, the pump head having a longitudinal axis extending from a proximal end of the pump head to a distal end of the pump head, the pump head configured to take a compressed state and an expanded state, the pump head having a first radius from the longitudinal axis to an inner wall of the pump head in the expanded state and a second radius from the longitudinal axis to an inner wall of the pump head in the compressed state, wherein the pump head is configured to automatically elastically expand into the expanded state upon release from the catheter;
- a rotor disposed in the pump head and sharing the longitudinal axis of the pump head, the rotor comprising a frame structure forming at least one impeller blade and comprising a boundary frame forming a radial edge of the at least one impeller blade, the at least one impeller blade being elastically compressible and configured to automatically elastically expand to an operational state, wherein in the operational state the at least one impeller blade extends a first distance radially outward from the longitudinal axis of the pump head to the boundary frame forming the radial edge of the at least one impeller blade, wherein the at least one impeller blade is configured to convey a fluid;
- wherein in the expanded state of the pump head, the first radius of the pump head is longer than the first distance of the at least one impeller blade, forming a radial clearance gap between the boundary frame of the impeller blade and the pump head, wherein the radial clearance gap is constant during operation of the pump;
- wherein the frame structure further comprises at least two radial struts extending from the boundary frame toward the longitudinal axis;
- wherein the boundary frame and the at least two radial struts form a loop defining the at least one impeller blade;
- and
- pumping blood through the patient's body, using the at least one impeller blade.
6 more elements
A method comprising
- placing an intravascular blood pump device inside a body of a patient, the intravascular blood pump device including:
- a catheter having a proximal end and a distal end;
- a pump head disposed distal of the distal end of the catheter, the pump head having a longitudinal axis extending from a proximal end of the pump head to a distal end of the pump head, the pump head configured to take a compressed state and an expanded state, the pump head having a first radius from the longitudinal axis to an inner wall of the pump head in the expanded state and a second radius from the longitudinal axis to an inner wall of the pump head in the compressed state, wherein the pump head is configured to automatically elastically expand into the expanded state upon release from the catheter;
- a rotor disposed in the pump head and sharing the longitudinal axis of the pump head, the rotor comprising a frame structure forming at least one impeller blade and comprising a boundary frame forming a radial edge of the at least one impeller blade, the at least one impeller blade being elastically compressible and configured to automatically elastically expand to an operational state, wherein in the operational state the at least one impeller blade extends a first distance radially outward from the longitudinal axis of the pump head to the boundary frame forming the radial edge of the at least one impeller blade, wherein the at least one impeller blade is configured to convey a fluid;
- wherein in the expanded state of the pump head, the first radius of the pump head is longer than the first distance of the at least one impeller blade, forming a radial clearance gap between the boundary frame of the impeller blade and the pump head, wherein the radial clearance gap is constant during operation of the pump;
- wherein the frame structure further comprises an elastic covering spanning the frame structure;
- and
- pumping blood through the patient's body, using the at least one impeller blade.
5 more elements
A method comprising:
- placing an intravascular blood pump device inside a body of a patient, the intravascular blood pump device including:
- a catheter having a proximal end and a distal end;
- a pump head disposed distal of the distal end of the catheter, the pump head having a longitudinal axis extending from a proximal end of the pump head to a distal end of the pump head, the pump head configured to take a compressed state and an expanded state, the pump head having a first radius from the longitudinal axis to an inner wall of the pump head in the expanded state and a second radius from the longitudinal axis to an inner wall of the pump head in the compressed state, wherein the pump head is configured to automatically elastically expand into the expanded state upon release from the catheter;
- a rotor disposed in the pump head and sharing the longitudinal axis of the pump head, the rotor comprising a frame structure forming at least one impeller blade and comprising a boundary frame forming a radial edge of the at least one impeller blade, the at least one impeller blade being elastically compressible and configured to automatically elastically expand to an operational state, wherein in the operational state the at least one impeller blade extends a first distance radially outward from the longitudinal axis of the pump head to the boundary frame forming the radial edge of the at least one impeller blade, wherein the at least one impeller blade is configured to convey a fluid;
- wherein in the expanded state of the pump head, the first radius of the pump head is longer than the first distance of the at least one impeller blade, forming a radial clearance gap between the boundary frame of the impeller blade and the pump head, wherein the radial clearance gap is constant during operation of the pump;
- wherein the at least one impeller blade is a helical blade;
- and
- pumping blood through the patient's body, using the at least one impeller blade.
5 more elements
A method comprising:
- placing an intravascular blood pump device inside a body of a patient, the intravascular blood pump device including:
- a catheter having a proximal end and a distal end;
- a pump head disposed distal of the distal end of the catheter, the pump head having a longitudinal axis extending from a proximal end of the pump head to a distal end of the pump head, the pump head configured to take a compressed state and an expanded state, the pump head having a first radius from the longitudinal axis to an inner wall of the pump head in the expanded state and a second radius from the longitudinal axis to an inner wall of the pump head in the compressed state, wherein the pump head is configured to automatically elastically expand into the expanded state upon release from the catheter;
- a rotor disposed in the pump head and sharing the longitudinal axis of the pump head, the rotor comprising a frame structure forming at least one impeller blade and comprising a boundary frame forming a radial edge of the at least one impeller blade, the at least one impeller blade being elastically compressible and configured to automatically elastically expand to an operational state, wherein in the operational state the at least one impeller blade extends a first distance radially outward from the longitudinal axis of the pump head to the boundary frame forming the radial edge of the at least one impeller blade, wherein the at least one impeller blade is configured to convey a fluid;
- wherein in the expanded state of the pump head, the first radius of the pump head is longer than the first distance of the at least one impeller blade, forming a radial clearance gap between the boundary frame of the impeller blade and the pump head, wherein the radial clearance gap is constant during operation of the pump;
- further comprising a flexible projection extending from the pump head;
- and
- pumping blood through the patient's body, using the at least one impeller blade.
5 more elements
A method comprising:
- placing an intravascular blood pump device inside a body of a patient, the intravascular blood pump device including:
- a catheter having a proximal end and a distal end;
- a pump head disposed distal of the distal end of the catheter, the pump head having a longitudinal axis extending from a proximal end of the pump head to a distal end of the pump head, the pump head configured to take a compressed state and an expanded state, the pump head having a first radius from the longitudinal axis to an inner wall of the pump head in the expanded state and a second radius from the longitudinal axis to an inner wall of the pump head in the compressed state, wherein the pump head is configured to automatically elastically expand into the expanded state upon release from the catheter;
- a rotor disposed in the pump head and sharing the longitudinal axis of the pump head, the rotor comprising a frame structure forming at least one impeller blade and comprising a boundary frame forming a radial edge of the at least one impeller blade, the at least one impeller blade being elastically compressible and configured to automatically elastically expand to an operational state, wherein in the operational state the at least one impeller blade extends a first distance radially outward from the longitudinal axis of the pump head to the boundary frame forming the radial edge of the at least one impeller blade, wherein the at least one impeller blade is configured to convey a fluid;
- wherein in the expanded state of the pump head, the first radius of the pump head is longer than the first distance of the at least one impeller blade, forming a radial clearance gap between the boundary frame of the impeller blade and the pump head, wherein the radial clearance gap is constant during operation of the pump;
- further comprising a bearing at a distal end of the rotor, the bearing configured to couple the rotor to the pump head;
- and
- pumping blood through the patient's body, using the at least one impeller blade.
5 more elements
Dependencies are inferred from the claim text.