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An optical measurement method for the simultaneous assessment of respiration and heart rates in preterm infants
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10.1063/1.4845635
/content/aip/journal/rsi/84/12/10.1063/1.4845635
http://aip.metastore.ingenta.com/content/aip/journal/rsi/84/12/10.1063/1.4845635
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic of the measurement set-up proposed for the simultaneous measurement of HR and RR.

Image of FIG. 2.
FIG. 2.

Example of data set (duration 4.5 s) from one patient: illustrating the ECG signal (top), the flow signal (middle), and LDVi signal (bottom). HP and RP are, respectively, the heart period of the ith cardiac event and the ith respiration even. Reprinted with permission from AIP Conf. Proc. , 275 (2012). Copyright 2012 American Institute of Physics. 26

Image of FIG. 3.
FIG. 3.

Skin velocity measured by LDVi (raw data) with the first 3 heart periods (HPi) highlighted.

Image of FIG. 4.
FIG. 4.

Power spectrum density of the velocity signal measured by the LDVi.

Image of FIG. 5.
FIG. 5.

Steps of the signal processing procedure: extraction of the respiration period (RP) (a) and of the cardiac periods (HP) (b).

Image of FIG. 6.
FIG. 6.

Box-and-Whisker plots of R: Results obtained for HP calculation (top) and for RP calculation (bottom). Reprinted with permission from AIP Conf. Proc. , 275 (2012). Copyright 2012 American Institute of Physics.

Image of FIG. 7.
FIG. 7.

LDVi signal (dotted line) and reference ECG signal (thick line): The epoch spans of 3 cardiac cycles (time window: 1.5 s).

Image of FIG. 8.
FIG. 8.

Scatter plot of HP values: LDV vs ECG data. Reprinted with permission from AIP Conf. Proc. , 275 (2012). Copyright 2012 American Institute of Physics.

Image of FIG. 9.
FIG. 9.

Bland-Altman plot of HP data measured by LDVi and ECG. Reprinted with permission from AIP Conf. Proc. , 275 (2012). Copyright 2012 American Institute of Physics.

Image of FIG. 10.
FIG. 10.

Processed LDVi signal (dotted line) and the reference signal from the ventilator flow-meter (thick line): Duration = 3 s.

Image of FIG. 11.
FIG. 11.

Scatter plot of RP measured by LDVi vs ECG data. Reprinted with permission from AIP Conf. Proc. , 275 (2012). Copyright 2012 American Institute of Physics.

Image of FIG. 12.
FIG. 12.

Bland-Altman plot of RP data measured by ECG and DVi. Reprinted with permission from AIP Conf. Proc. , 275 (2012). Copyright 2012 American Institute of Physics.

Image of FIG. 13.
FIG. 13.

LDVi signal during two temporary suspensions of the normal respiration rhythm.

Image of FIG. 14.
FIG. 14.

Apnea events: spectrogram of the LDVi signal.

Image of FIG. 15.
FIG. 15.

An apnea event as measured by the LDVi system.

Image of FIG. 16.
FIG. 16.

Spectrogram of the apnea event.

Image of FIG. 17.
FIG. 17.

Hiccup events.

Image of FIG. 18.
FIG. 18.

Spectrogram of the LDVi signal during a series of hiccups events.

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/content/aip/journal/rsi/84/12/10.1063/1.4845635
2013-12-20
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: An optical measurement method for the simultaneous assessment of respiration and heart rates in preterm infants
http://aip.metastore.ingenta.com/content/aip/journal/rsi/84/12/10.1063/1.4845635
10.1063/1.4845635
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