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Audio spectrum analysis of umbilical artery Doppler ultrasound signals applied to a clinical material.

Thuring, Ann LU ; Brännström, Jonas LU ; Jansson, Tomas LU and Marsal, Karel LU (2014) In Acta Obstetricia et Gynecologica Scandinavica 93(12). p.1320-1324
Abstract
Analysis of umbilical artery flow velocity waveforms characterized by pulsatility index (PI) is used to evaluate fetoplacental circulation in high-risk pregnancies. However, an experienced sonographer may be able to further differentiate between various timbres of Doppler audio signals. Recently, we have developed a method for objective audio signal characterization; the method has been tested in an animal model. In the present pilot study, the method was for the first time applied to human pregnancies. Doppler umbilical artery velocimetry was performed in 13 preterm fetuses before and after two doses of 12 mg betamethasone. The auditory measure defined by the frequency band where the spectral energy had dropped 15 dB from its maximum... (More)
Analysis of umbilical artery flow velocity waveforms characterized by pulsatility index (PI) is used to evaluate fetoplacental circulation in high-risk pregnancies. However, an experienced sonographer may be able to further differentiate between various timbres of Doppler audio signals. Recently, we have developed a method for objective audio signal characterization; the method has been tested in an animal model. In the present pilot study, the method was for the first time applied to human pregnancies. Doppler umbilical artery velocimetry was performed in 13 preterm fetuses before and after two doses of 12 mg betamethasone. The auditory measure defined by the frequency band where the spectral energy had dropped 15 dB from its maximum level (MAXpeak-15 dB ), increased two days after betamethasone administration (p = 0.001) parallel with a less pronounced decrease in PI (p = 0.04). The new auditory parameter MAXpeak-15 dB reflected the changes more sensitively than the PI did. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Acta Obstetricia et Gynecologica Scandinavica
volume
93
issue
12
pages
1320 - 1324
publisher
Wiley-Blackwell
external identifiers
  • pmid:25168261
  • wos:000344876200016
  • pmid:25168261
  • scopus:84912013359
ISSN
1600-0412
DOI
10.1111/aogs.12468
language
English
LU publication?
yes
id
d90c5aa9-a458-4292-b719-259880ed1baf (old id 4612767)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/25168261?dopt=Abstract
date added to LUP
2016-04-01 11:09:15
date last changed
2022-01-26 05:50:24
@article{d90c5aa9-a458-4292-b719-259880ed1baf,
  abstract     = {{Analysis of umbilical artery flow velocity waveforms characterized by pulsatility index (PI) is used to evaluate fetoplacental circulation in high-risk pregnancies. However, an experienced sonographer may be able to further differentiate between various timbres of Doppler audio signals. Recently, we have developed a method for objective audio signal characterization; the method has been tested in an animal model. In the present pilot study, the method was for the first time applied to human pregnancies. Doppler umbilical artery velocimetry was performed in 13 preterm fetuses before and after two doses of 12 mg betamethasone. The auditory measure defined by the frequency band where the spectral energy had dropped 15 dB from its maximum level (MAXpeak-15 dB ), increased two days after betamethasone administration (p = 0.001) parallel with a less pronounced decrease in PI (p = 0.04). The new auditory parameter MAXpeak-15 dB reflected the changes more sensitively than the PI did.}},
  author       = {{Thuring, Ann and Brännström, Jonas and Jansson, Tomas and Marsal, Karel}},
  issn         = {{1600-0412}},
  language     = {{eng}},
  number       = {{12}},
  pages        = {{1320--1324}},
  publisher    = {{Wiley-Blackwell}},
  series       = {{Acta Obstetricia et Gynecologica Scandinavica}},
  title        = {{Audio spectrum analysis of umbilical artery Doppler ultrasound signals applied to a clinical material.}},
  url          = {{http://dx.doi.org/10.1111/aogs.12468}},
  doi          = {{10.1111/aogs.12468}},
  volume       = {{93}},
  year         = {{2014}},
}