Catheter device
AssigneeAis GmbH Aachen Innovative Solutions
InventorsJoachim-Georg Pfeffer, Thomas Schmitz-Rode, Rolf W. Günther
Life of this patent
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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.
Claims26
A method of providing left side support for a patient's heart with a percutaneous intravascular pump system, the pump system comprising a pump head and a hose, the pump head comprising a rotor inside a pump housing, the method comprising:
- inserting the percutaneous intravascular pump system within the patient's vasculature;
- positioning the hose across the patient's aortic valve such that a distal end of the hose is positioned within the patient's left ventricle and a proximal end of the hose is positioned in the patient's aorta;
- and
- operating the pump at a given output pressure during first and second time periods so that during the first time period the given output pressure relative to a first ambient pressure in the patient's aorta generates a blood flow from the patient's left ventricle to the patient's aorta that opens the hose, and during the second time period the given output pressure relative to a second ambient pressure in the patient's aorta allows the hose to at least partially close when the patient's aortic valve closes around the hose such that backflow of blood through the hose from the patient's aorta into the patient's left ventricle is restricted or prevented during the second time period.
A method of providing circulatory support for a patient's heart by a percutaneous intravascular pump system, comprising:
- inserting the intravascular pump system percutaneously into the patient's vasculature, the intravascular pump system comprising a pump having a rotor, and a cannula;
- advancing the pump and cannula through the patient's vasculature toward the patient's heart until the cannula is positioned across the patient's aortic valve;
- operating the pump at a given output pressure during a first time period to achieve a first pressure differential between the given output pressure and a first ambient pressure in the patient's aorta such that the rotor rotates and generates blood flow from the patient's left ventricle into the patient's aorta;
- and
- operating the pump at the given output pressure during a second time period to achieve a second pressure differential between the given output pressure and a second ambient pressure in the patient's aorta such that the rotor stops or rotates at a speed slower than a speed at which it rotates during the first time period, and such that blood backflow through the cannula from the patient's aorta into the patient's left ventricle is restricted or prevented during the second time period,
- wherein the first pressure differential is greater than the second pressure differential.
Dependencies are inferred from the claim text.