Integrated real time bowel sound detector for artificial pancreas systems

Mamun, Khandaker A. Al; McFarlane, Nicole

doi:10.1016/j.sbsr.2016.01.004

Cited by 24 publications

(23 citation statements)

References 17 publications

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“…Research on BSs use the characteristics of BSs to observe gastrointestinal status and diagnose gastrointestinal diseases. In clinical practice, the observation of gastrointestinal peristalsis is used to monitor feeding events, thus for example, providing a reference for the monitoring of blood glucose in an arti cial pancreas system [4]; BSs can also be used as one of the indicative parameters of gastrointestinal diseases [5]. If a gastrointestinal tract development lesions occur, such as gastroduodenal disease, intestinal disease, and large bowel disease, the corresponding intensity or number of BSs may also be abnormal.…”

Section: Studies Of Noninvasive Methods To Judge the Recovery Of Gastmentioning

confidence: 99%

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Changes in bowel sounds of inpatients undergoing general anesthesia

Wang

Liu

et al. 2020

Preprint

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Background: General anesthesia can affect intestinal function, but there is no objective, practical and effective indicator to evaluate the inhibition and recovery of intestinal function. The main objectives of this study were to assess whether bowel sounds (BSs) changed before, immediately after and 3 hours after general anesthesia, and whether these changes in BSs are an effective indicator of intestinal function and an accurate guide for post-operative feeding. Methods: We randomly selected 26 inpatients and collected three sets of 5-minute continuous BS data before the operation (Pre-op), immediately after the operation (Pro-op) and three hours after the operation (3h-Pro-op) for each patient. Then the linear and nonlinear characteristic values (CVs) of each effective bowel sound were extracted and paired t-tests and rank-sum tests were used to evaluate the changes in the BSs. Results: The differences in CVs, between Pre-op and Pro-op, as well as between Pro-op and 3h-Pro-op, were statistically significant (p <0.05). However, there is no statistically significant differences between all the CVs between Pre-op and 3h-Pro-op (p >0.05). Conclusion: BSs changes before and after general anesthesia. Furthermore, the BSs are weakened due to general anesthesia and recover to the pre-op state three hours later. Therefore, the BSs can be an indicator of intestinal function under general anesthesia, so as to provide guidance for postoperative feeding, which is of considerable clinical significance.

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Section: Studies Of Noninvasive Methods To Judge the Recovery Of Gastmentioning

confidence: 99%

“…The authors declare that they have no competing interests. 4 Anesthesia and Operation Center, Chinese PLA General Hospital, Beijing, China. 5 College of Otolaryngology Head and Neck Surgery, Chinese PLA General Hospital, Beijing, China.…”

Section: Declarations Fundingmentioning

confidence: 99%

Changes in bowel sounds of inpatients undergoing general anesthesia

Wang

Liu

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…Researches on BSs use the characteristics of BSs to observe gastrointestinal state and diagnose gastrointestinal diseases. In clinical practice, the observation of gastrointestinal peristalsis is used to monitor feeding events, thus providing a reference for the monitoring of blood glucose in the artificial pancreas system [4]; BS can also be used as one of the indicative parameters of gastrointestinal diseases [5]. Gastrointestinal tract development if lesions occur, such as gastroduodenal disease, intestinal disease, and large bowel disease, the corresponding intensity or number of BSs may also be abnormal.…”

Section: Studies On Noninvasive Methods Judge the Recovery Of Gastroimentioning

confidence: 99%

Changes in bowel sounds of inpatients undergo general anesthesia

Wang

Liu

et al. 2020

Preprint

View full text Add to dashboard Cite

Background: General anesthesia can affect intestinal function, but there is no objective and effective indicator to evaluate the inhibition and recovery of intestinal function. The main objective of this study is to assess whether bowel sounds (BSs) change before and after general anesthesia, then it can be explained that the BS can be an effective indicator of intestinal function. Methods: We randomly selected 26 inpatients and collected three sets of 5-minute continuous BSs before operation (Pre-op), after operation (Pro-op) and three hours after operation(3h-Pro-op) separately for each patient. The data were de-noised with adaptive filtering and wavelet threshold denoising, and processed with fractal dimension to identify the effective bowel sounds (EBSs). Then the linear and nonlinear characteristic values (CVs) of each EBS were extracted and paired t -test and rank-sum test were used to evaluate the changes of the BSs after general anesthesia. Results: For the difference between Pre-op and Pro-op, as well as between Pro-op and 3h-Pro-op, there are statistical differences ( p <0.05). Specifically, the linear CVs that can reflect the occurrence frequency, overall energy and overall duration of EBSs and the nonlinear CVs that can reflect the dispersion degree of stability and complexity of EBSs were statistically significant. However, there is no statistical difference in the CVs reflecting the energy and duration, as well as the stability and complexity of locally EBSs ( p >0.05). Also, there is no statistically significant difference between all the characteristic values between Pre-op and 3h-Pro-op ( p >0.05). Conclusion: The BSs change after general anesthesia. Furthermore, the BSs are weakened after general anesthesia and recovered to the state before general anesthesia three hours later. Therefore, the BS can be an indicator of intestinal function under general anesthesia, so as to provide guidance for postoperative feeding , which is of great clinical significance.

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“…In contrast to the above works, the focus of the work presented in the current paper is early meal detection using abdominal sounds. To the best of author's knowledge Mamun and McFarlane [9] were the first to explore the sound recordings for meal detection. They developed a bowel-sound detector circuit, aiming to use it in an artificial pancreas.…”

Section: Introductionmentioning

confidence: 99%

Pilot Study of Early Meal Onset Detection from Abdominal Sounds

Kumar

Soiland

Stavdahl

et al. 2019

2019 E-Health and Bioengineering Conference (EHB)

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A typical artificial pancreas depends only on the continuous glucose monitoring (CGM) value for insulin dosing. However, both the insulin infusion and the glucose sensing are subject to time delays and slow dynamics. An automated and reliable meal onset information could enhance the control outcome of artificial pancreas by making it possible to infuse insulin earlier and thereby avoid large postprandial glucose excursions.In this study we employ abdominal sounds recorded in two healthy volunteers with a condenser microphone and propose an automated approach for meal onset detection from abdominal sounds. We use the Mel-frequency cepstral coefficients (MFCCs) and wavelet entropy extracted from the abdominal sounds as features. These features are fed to a simple feed forward neural network for discriminating meal from no-meal abdominal sounds.This approach detects meal onset with an average delay of 4.3 minutes in our limited number of subjects. More importantly, it provides lesser response delay than the state-of-the-art CGM based approach, which achieved a response delay ranging from 30-40 minutes. The preliminary results indicate that the proposed abdominal sound-based approach may provide early meal onset information. This can be exploited in an artificial pancreas through allowable earlier meal insulin boluses, resulting in improved glycemic control.

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Integrated real time bowel sound detector for artificial pancreas systems

Cited by 24 publications

References 17 publications

Changes in bowel sounds of inpatients undergoing general anesthesia

Changes in bowel sounds of inpatients undergoing general anesthesia

Changes in bowel sounds of inpatients undergo general anesthesia

Pilot Study of Early Meal Onset Detection from Abdominal Sounds

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