Automated CCHD screening and detection

摘要

Automated critical congenital heart defect (“CCHD”) screening systems and processes are described. A caregiver may be guided to use a single or dual sensor pulse oximeter to obtain pre- and post-ductal blood oxygenation measurements. A delta of the measurements indicates the possible existence or nonexistence of a CCHD. Errors in the measurements are reduced by a configurable measurement confidence threshold based on, for example, a perfusion index. Measurement data may be stored and retrieved from a remote data processing center for repeated screenings.

主权项

1. A method of detecting a critical congenital heart defect using a pulse oximeter, the method comprising:
instructing a caregiver, using a display of a pulse oximeter, to position a noninvasive sensor to a first measurement site predetermined to be indicative of a pre-ductal blood oxygenation level, wherein said noninvasive sensor is configured to output signals responsive to attenuation of light at measurement sites on a patient, and wherein said pulse oximeter is in communication with the noninvasive sensor to drive light sources of said noninvasive sensor and receive said output signals; receiving, during a first duration of time, said output signals to obtain a first waveform responsive to a pre-ductal oxygen saturation of the patient, said first duration of time corresponding to when said noninvasive sensor is positioned at said first measurement site; instructing the caregiver, using the display of the pulse oximeter, to position said noninvasive sensor to a second measurement site predetermined to be indicative of a post-ductal blood oxygenation level; receiving, during a second duration of time, said output signals to obtain a second waveform responsive to a post-ductal oxygen saturation of the patient, said second duration of time corresponding to when said noninvasive sensor is positioned at said second measurement site; electronically determining, by one or more signal processors, one or more waveform features in said first waveform responsive to said pre-ductal oxygen saturation; electronically determining, by the one or more signal processors, one or more of said one or more waveform features in said second waveform responsive to said post-ductal oxygen saturation; electronically time-wise aligning, by the one or more signal processors, one or more of said one or more waveform features from said first waveform with one or more of said one or more waveform features from said second waveform; electronically determining, by the one or more signal processors, a pre-ductal value of said first waveform at a first time; electronically determining, by the one or more signal processors, a post-ductal value of said second waveform at said first time taking into account said time-wise aligning; and in response to determining said pre-ductal value and said post-ductal value differ by a predetermined threshold, outputting display indicia to said display indicating a likelihood that said patient has said critical congenital heart defect.