![]() ![]() Conclusion: The investigated DLS sensor was sensitive to movement, overall providing less accurate HR measurements than ECG and pulse oximetry. Application of this cut-off to the second group ( n = 16) showed good agreement between DLS-derived HR and ECG-derived HR (bias –0.73 bpm 95% limits of agreement –15.46 and 14.00 bpm) at the forehead with approximately 80% (i.e., 1,066/1,310) of all data pairs remaining. When applying the international accuracy standard for HR detection, DLS accuracy in the first group ( n = 15) was optimal at the forehead (SNR cut-off 1.66). ECG-DLS paired data points were collected at the forehead, an upper extremity, the thorax, a lower extremity, and the abdomen. Results: HR measurements from 31 infants were analyzed. In the first group, the optimal SNR cut-off value was determined and then applied to the second group to assess agreement. Patients were randomly divided into 2 groups. We recorded every 10th second of the DLS-derived HR and the DLS signal-to-noise ratio (SNR), and the ECG-derived HR was extracted for analysis. HR was measured with the DLS sensor at 5 different sites for 15 min each. Methods: Stable infants with a gestational age of ≥26 weeks, monitored with ECG, were eligible for inclusion. Objective: The aim was to determine the accuracy of DLS for HR measurement in infants, compared to ECG-derived HR. Recently, the dynamic light scattering (DLS) technique has been miniaturized, allowing noninvasive HR measurements with a single sensor. Background: Heart rate (HR) detection in premature infants using electrocardiography (ECG) is challenging due to a low signal amplitude and the fragility of the premature skin. ![]()
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