Blood flow meter
AssigneeBoston Scientific Corporation
InventorDeepak Kumar Sharma
Life of this patent
Estimating the term…
Abstract
A blood flow meter includes a rotor configured to be placed within a flow of blood and to be driven to rotate by the flow of blood; a magnetic encoder configured to sense the rotation of the rotor and to generate a rotation signal based on the sensed rotation of the rotor; a first pressure sensor configured to measure an upstream pressure; a second pressure sensor configured to measure a downstream pressure; and a control unit. The control unit is configured to determine a differential pressure, the differential pressure including a difference between the downstream pressure and the upstream pressure; and cause an alteration to the rotation of the rotor based on the differential pressure.
Claims19
A blood flow meter, comprising:
- a rotor configured to be placed within a flow of blood and to be driven to rotate by the flow of blood;
- a magnetic encoder configured to sense the rotation of the rotor and to generate a rotation signal based on the sensed rotation of the rotor;
- a first pressure sensor configured to measure an upstream pressure, wherein the upstream pressure is the blood pressure upstream of the rotor;
- a second pressure sensor configured to measure a downstream pressure, wherein the downstream pressure is the blood pressure downstream of the rotor;
- and
- a control unit configured to:
- determine a differential pressure, the differential pressure comprising a difference between the downstream pressure and the upstream pressure;
- and
- cause an alteration to the rotation of the rotor based on the differential pressure.
A method of using a blood flow meter having a rotor placed in the flow of blood to determine a blood flow rate, wherein the rotor is configured to be driven to rotate by the flow of blood, the method comprising:
- measuring, using an upstream pressure sensor, an upstream pressure, wherein the upstream pressure is the blood pressure upstream of the rotor;
- measuring, using a downstream pressure sensor, a downstream pressure, wherein the downstream pressure is the blood pressure downstream of the rotor;
- determining a differential pressure, the differential pressure comprising a difference between the downstream pressure and the upstream pressure;
- causing an alteration to the rotation of the rotor based on the differential pressure;
- sensing, using a magnetic encoder, the rotation of the rotor;
- generating, using the magnetic encoder and based on the rotation of the rotor, a rotation signal;
- and
- determining, based on the rotation signal, a blood flow rate.
A blood flow meter, comprising:
- a rotor configured to be placed within a flow of blood and to be driven to rotate by the flow of blood;
- a magnetic encoder configured to sense the rotation of the rotor and to generate a rotation signal based on the sensed rotation of the rotor;
- a first pressure sensor configured to measure an upstream pressure, wherein the upstream pressure is the blood pressure upstream of the rotor;
- a second pressure sensor configured to measure a downstream pressure, wherein the downstream pressure is the blood pressure downstream of the rotor;
- a differential transducer configured to determine a differential pressure, the differential pressure comprising a difference between the downstream pressure and the upstream pressure;
- and
- a controller configured to cause an alteration to the rotation of the rotor based on the differential pressure.
Dependencies are inferred from the claim text.