Piezoelectric vibrator-stimulated potential and heart rate accelerations detected from the fetus
| Autor: | Rina Matsuoka, Katsuhisa Ikeda, Kazusaku Kamiya, Remi Hibiya, Atsuo Itakura, Yota Shimanuki, Takuji Koike, Miho Sato, Sinyoung Lee, Misato Kasai |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
medicine.medical_specialty
Gestational Age 03 medical and health sciences 0302 clinical medicine Fetus Heart Rate Pregnancy Internal medicine Heart rate Pressure Medicine Humans Sound pressure Sound recognition 030219 obstetrics & reproductive medicine business.industry Gestational age General Medicine Anatomy Heart Rate Fetal Fetal heart rate SOUND STIMULATION Sound Otorhinolaryngology Acoustic Stimulation embryonic structures Pediatrics Perinatology and Child Health Heart rate acceleration Cardiology Evoked Potentials Auditory Female business 030217 neurology & neurosurgery |
| Zdroj: | International journal of pediatric otorhinolaryngology. 101 |
| ISSN: | 1872-8464 |
| Popis: | Objectives The fetus is well known to have a substantial capacity for sound recognition in the uterine environment. The aim of this study was to develop a sound stimulus system equipped with a piezoelectric vibrator (PV), record the PV-stimulated potential (PVSP) of the fetus and monitor changes of the fetal heart rate (FHR) under PV stimulation. Methods The relationship between the input voltage applied to a piezoelectric vibrator and the sound pressure generated in the uterus was calibrated based on a model of the maternal abdomen. Fourteen fetuses for the measurement of the PVSP and 22 fetuses for the measurement of the heart rate changes from low-risk pregnant women were recruited. Results The PVSP responses were obtained in 9 out of 14 fetuses. All the tested fetuses accelerated the FHR after the 2 kHz tone stimulation at 70 dB intensity generated by PV from 32 to 37 weeks gestational age. Conclusions Using a newly developed sound stimulus system equipped with PV, the electric responses of a fetus recorded from electrodes placed on the mother's abdomen may be closely related to the auditory evoked response. Significant accelerations of FHR were objectively, accurately and readily obtained after the sound stimulation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect