PATENT CLAIM ANALYSIS

Application Number: 15953707
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-08
Patent Classification: ["600", "493000"]

Abstract:
A method for determining a calibrated aortic pressure waveform from a brachial cuff waveform involves the use of one or more generalized transfer functions. The one or more generalized transfer functions are specific for predetermined brachial cuff pressure ranges, such as below diastolic pressure, between diastolic and systolic pressure, and above systolic pressure. The brachial cuff is inflated to a pressure within the pressure range appropriate for the generalized transfer function to be applied to the brachial cuff waveform to generate the aortic pressure waveform. In some circumstances, it may be necessary to use a calibration transfer function to generate a calibrated aortic waveform. In other circumstances, the calibration transfer function is not necessary.

Claim (Index 23):
A blood pressure measuring system for determining a calibrated aortic pressure waveform with cardiovascular waveform features preserved the system comprising:\n a brachial cuff device having a brachial cuff, a tube, a pressure pump with a control unit, and a pressure sensor that provides an analog signal, said brachial cuff device being capable of measuring a patient's brachial systolic pressure (SPB) and brachial diastolic pressure (DPB) by oscillometric technique; the control unit controlling the inflation of the brachial cuff around a patient's upper arm to a constant pressure within a predetermined pressure range, wherein the predetermined pressure range is one of less than the patient's brachial diastolic pressure DPB as measured by the brachial cuff device by oscillometric technique, between the patient's brachial diastolic pressure DPB and the brachial systolic pressure SPB as measured by the brachial cuff device by oscillometric technique, and above the patient's brachial systolic pressure SPB as measured by the brachial cuff device by oscillometric technique; a digital signal processor comprising a low pass filter and a high pass filter that receives the analog signal from the pressure sensor when the cuff pressure is maintained at a constant pressure within the predetermined pressure range and outputs a digital brachial cuff signal containing filtered data that preserves cardiovascular waveform features of the patient's brachial cuff volumetric displacement waveform, said preserved cardiovascular waveform features comprising a first shoulder, a second shoulder and an incisura; and software on a computer that calibrates the brachial cuff volumetric displacement waveform using at least two of the patient's brachial systolic pressure (SPB) as measured by the brachial cuff device by oscillometric technique, the patient's brachial mean pressure (MPB) and the patient's brachial diastolic pressure (DPB) as measured by the brachial cuff device by oscillometric technique, wherein the patient's brachial mean pressure (MPB) if used is calculated by the brachial cuff device based on measured values for the patient's brachial systolic pressure (SPB) and the patient's brachial diastolic pressure (DPB), and the software further converts the calibrated brachial cuff volumetric displacement waveform with cardiovascular waveform features preserved to a calibrated aortic pressure waveform with cardiovascular waveform features preserved by using one or more generalized transfer functions; wherein each of the one or more generalized transfer functions are determined specifically for application to a calibrated brachial cuff volumetric displacement waveform measured by the brachial cuff inflated to a pressure within the predetermined pressure range, said one or more generalized transfer functions representing the harmonic ratio in amplitude and phase to transform the calibrated brachial cuff volumetric displacement waveform with cardiovascular waveform features preserved to the calibrated aortic pressure waveform with cardiovascular waveform features preserved when the brachial cuff is inflated to a pressure within the selected pressure range.

Metadata:
- Claim Count in Document: 17.0
- Percentile: 91.0
- Lexical Diversity: 2.21429
- Patent Class: 600.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15077371', '13101193', '13714058', '15019541', '12132826']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.5390378365050109
- 35 USC 102 Novelty (BERT): 0.6527072128083216
- Combined Prediction Score: 0.550404774135342
- Mean Citation Score: 449.899832
- Max Citation Score: 656.1911
- Similarity Product: 629.5093374163389

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test