Non-invasive blood pressure measurement devices, systems and methods
AssigneeStryker Corporation
InventorClinton T. Siedenburg
Life of this patent
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Abstract
The disclosed non-invasive blood pressure measurement systems and methods using the conservation of mass, conservation of momentum, and/or constitutive equation(s), which may also include the water hammer equation use pulse wave velocity and blood velocity. There are multiple manners by which pulse wave velocity and blood velocity may be assessed by transmitting energy, such as light or ultrasound, through tissues of the patient and measuring values and times of reflectivity of the energy from the interrogated tissues. Blood pressure can be determined from the one or more manners of assessing the PWV, blood velocity, and blood flow profile.
Claims19
A non-invasive blood pressure (NIBP) device, comprising:
- an energy module having one or more transducers configured to emit energy towards at least one of a blood vessel of a patient or blood flowing through the blood vessel of a patient, the one or more transducers configured to:
- receive at least a portion of the energy reflected from the at least one of the blood vessel of the patient or blood flowing through the blood vessel of the patient, and
- generate a reflected energy signal based on the received energy;
- a signal processing module configured to:
- calculate at least one of a pulse wave velocity (PWV) or a blood velocity from the reflected energy signal;
- and
- determine a blood pressure of the patient based, at least in part, on the at least one of:
- a PWV or the blood velocity, or
- one or more blood vessel geometries.
A method of calculating a blood pressure in a non-invasive manner, the method including:
- emitting energy from one or more transducers, the energy directed towards at least one of a blood vessel of a patient or blood flowing through the vessel;
- receiving energy, by the one or more transducers, reflected from the at least one of the blood vessel or the blood flowing through the vessel;
- generating a reflected energy signal based on the received energy;
- calculating at least one of:
- a pulse wave velocity (PWV) or a blood velocity, or
- one or more vessel geometries from the reflected energy signal;
- and
- calculating the blood pressure based on the calculated at least one of the PWV or the blood velocity or the one or more vessel geometries.
Dependencies are inferred from the claim text.