Fetal Actometer Based on Optical Fibre Gratings
2017
Преузимање 🢃
Аутори
Atanasoski, VladimirIvanović, Marija D.
Stojanović, N.
Hadžievski, Ljupčo
Petrović, Jovana S.
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Monitoring of fetal activity has been used to check wellbeing of fetus both clinically and in homecare. Clinically, fetal movements are monitored by an ultrasound transducer [1], simultaneously with the fetal heart rate and the uterine contractions measured by a tococardiograph (CTG) [2]. The absence of correlation between the fetal activity and the changes in its heart rate signals potential problems, the heaviest being the stillbirth [3]. In homecare, fetal movement is monitored by pregnant women directly, detection fully relying on mother's perception. It has been shown that mother's perception agrees with the fetal movement registered by an ultrasound actometer in 79% of cases in 34-40 weeks gestation period and in 72% of cases in 31-34 weeks gestation period [4]. The partial reliability of such a measurement indicates that a more accurate, objective and convenient monitoring method is needed in homecare. To further take a load off mother, who is supposed to perform measurements se...veral times a day, the new sensor should be wearable and the readout of fetal movements automatic. We propose a fetal actometer based on optical fibre grating sensors that can satisfy the above requirements. Long-period gratings are sensitive to changes in pressure, tension and curvature, hence to external changes of mother's abdomen caused by fetal movement. Detection was performed by monochromatic lateral filtering technique that relies on the transmitted power measurement at a specified wavelength [5]. An additional reference sensor was used to register mother's perception. To extract the useful information and produce a user-friendly output, an algorithm for counting fetal movements and their demarcation in the signal was developed. Traces of the maternal heart beat and breathing as well as fetal hiccups were eliminated by spectral filtering. The signal processing software is sensor independent and can be used with other actographs. Results of the study performed on healthy women in the third trimester of pregnancy show 75% agreement between the number of movements registered by the LPG sensors and mothers. A systematic difference between the signals came from the movements that the sensors registered but mothers did not perceive. The number of false positives, however, can be established only in comparison with the ultrasound detection. The good agreement with the maternal perception and the absence of cross-talk with the fetal heart rate measurement, along with the sensors' light weight, robustness and wearability, indicates their potential for use in hospitals and homecare and encourages further clinical studies.
Извор:
PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts, 2017, 121-121Издавач:
- Belgrade : Institute of Physics Belgrade
Напомена:
- VI International School and Conference on Photonics and COST actions: MP1406 and MP1402 : PHOTONICA2017 : August 23 - September 1, 2017; Belgrade.
Колекције
Институција/група
VinčaTY - CONF AU - Atanasoski, Vladimir AU - Ivanović, Marija D. AU - Stojanović, N. AU - Hadžievski, Ljupčo AU - Petrović, Jovana S. PY - 2017 UR - https://vinar.vin.bg.ac.rs/handle/123456789/13352 AB - Monitoring of fetal activity has been used to check wellbeing of fetus both clinically and in homecare. Clinically, fetal movements are monitored by an ultrasound transducer [1], simultaneously with the fetal heart rate and the uterine contractions measured by a tococardiograph (CTG) [2]. The absence of correlation between the fetal activity and the changes in its heart rate signals potential problems, the heaviest being the stillbirth [3]. In homecare, fetal movement is monitored by pregnant women directly, detection fully relying on mother's perception. It has been shown that mother's perception agrees with the fetal movement registered by an ultrasound actometer in 79% of cases in 34-40 weeks gestation period and in 72% of cases in 31-34 weeks gestation period [4]. The partial reliability of such a measurement indicates that a more accurate, objective and convenient monitoring method is needed in homecare. To further take a load off mother, who is supposed to perform measurements several times a day, the new sensor should be wearable and the readout of fetal movements automatic. We propose a fetal actometer based on optical fibre grating sensors that can satisfy the above requirements. Long-period gratings are sensitive to changes in pressure, tension and curvature, hence to external changes of mother's abdomen caused by fetal movement. Detection was performed by monochromatic lateral filtering technique that relies on the transmitted power measurement at a specified wavelength [5]. An additional reference sensor was used to register mother's perception. To extract the useful information and produce a user-friendly output, an algorithm for counting fetal movements and their demarcation in the signal was developed. Traces of the maternal heart beat and breathing as well as fetal hiccups were eliminated by spectral filtering. The signal processing software is sensor independent and can be used with other actographs. Results of the study performed on healthy women in the third trimester of pregnancy show 75% agreement between the number of movements registered by the LPG sensors and mothers. A systematic difference between the signals came from the movements that the sensors registered but mothers did not perceive. The number of false positives, however, can be established only in comparison with the ultrasound detection. The good agreement with the maternal perception and the absence of cross-talk with the fetal heart rate measurement, along with the sensors' light weight, robustness and wearability, indicates their potential for use in hospitals and homecare and encourages further clinical studies. PB - Belgrade : Institute of Physics Belgrade C3 - PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts T1 - Fetal Actometer Based on Optical Fibre Gratings SP - 121 EP - 121 UR - https://hdl.handle.net/21.15107/rcub_vinar_13352 ER -
@conference{ author = "Atanasoski, Vladimir and Ivanović, Marija D. and Stojanović, N. and Hadžievski, Ljupčo and Petrović, Jovana S.", year = "2017", abstract = "Monitoring of fetal activity has been used to check wellbeing of fetus both clinically and in homecare. Clinically, fetal movements are monitored by an ultrasound transducer [1], simultaneously with the fetal heart rate and the uterine contractions measured by a tococardiograph (CTG) [2]. The absence of correlation between the fetal activity and the changes in its heart rate signals potential problems, the heaviest being the stillbirth [3]. In homecare, fetal movement is monitored by pregnant women directly, detection fully relying on mother's perception. It has been shown that mother's perception agrees with the fetal movement registered by an ultrasound actometer in 79% of cases in 34-40 weeks gestation period and in 72% of cases in 31-34 weeks gestation period [4]. The partial reliability of such a measurement indicates that a more accurate, objective and convenient monitoring method is needed in homecare. To further take a load off mother, who is supposed to perform measurements several times a day, the new sensor should be wearable and the readout of fetal movements automatic. We propose a fetal actometer based on optical fibre grating sensors that can satisfy the above requirements. Long-period gratings are sensitive to changes in pressure, tension and curvature, hence to external changes of mother's abdomen caused by fetal movement. Detection was performed by monochromatic lateral filtering technique that relies on the transmitted power measurement at a specified wavelength [5]. An additional reference sensor was used to register mother's perception. To extract the useful information and produce a user-friendly output, an algorithm for counting fetal movements and their demarcation in the signal was developed. Traces of the maternal heart beat and breathing as well as fetal hiccups were eliminated by spectral filtering. The signal processing software is sensor independent and can be used with other actographs. Results of the study performed on healthy women in the third trimester of pregnancy show 75% agreement between the number of movements registered by the LPG sensors and mothers. A systematic difference between the signals came from the movements that the sensors registered but mothers did not perceive. The number of false positives, however, can be established only in comparison with the ultrasound detection. The good agreement with the maternal perception and the absence of cross-talk with the fetal heart rate measurement, along with the sensors' light weight, robustness and wearability, indicates their potential for use in hospitals and homecare and encourages further clinical studies.", publisher = "Belgrade : Institute of Physics Belgrade", journal = "PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts", title = "Fetal Actometer Based on Optical Fibre Gratings", pages = "121-121", url = "https://hdl.handle.net/21.15107/rcub_vinar_13352" }
Atanasoski, V., Ivanović, M. D., Stojanović, N., Hadžievski, L.,& Petrović, J. S.. (2017). Fetal Actometer Based on Optical Fibre Gratings. in PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts Belgrade : Institute of Physics Belgrade., 121-121. https://hdl.handle.net/21.15107/rcub_vinar_13352
Atanasoski V, Ivanović MD, Stojanović N, Hadžievski L, Petrović JS. Fetal Actometer Based on Optical Fibre Gratings. in PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts. 2017;:121-121. https://hdl.handle.net/21.15107/rcub_vinar_13352 .
Atanasoski, Vladimir, Ivanović, Marija D., Stojanović, N., Hadžievski, Ljupčo, Petrović, Jovana S., "Fetal Actometer Based on Optical Fibre Gratings" in PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts (2017):121-121, https://hdl.handle.net/21.15107/rcub_vinar_13352 .