Understanding differences between healthy swallows and penetration-aspiration swallows via compressive sensing of tri-axial swallowing accelerometry signals

Abstract

Swallowing accelerometry is a promising tool for non-invasive assessment of swallowing difficulties. A recent contribution showed that swallowing accelerometry signals for healthy swallows and swallows indicating laryngeal penetration or tracheal aspiration have different time-frequency structures, which may be problematic for compressive sensing schemes based on time-frequency dictionaries. In this paper, we examined the effects of different swallows on the accuracy of a compressive sensing scheme based on modulated discrete prolate spheroidal sequences. We utilized tri-axial swallowing accelerometry signals recorded from four patients during routinely schedule videofluoroscopy exams. In particular, we considered 77 swallows approximately equally distributed between healthy swallows and swallows presenting with some penetration/aspiration. Our results indicated that the swallow type does not affect the accuracy of a considered compressive sensing scheme. Also, the results confirmed previous findings that each individual axis contributes different information. Our findings are important for further developments of a device which is to be used for long-term monitoring of swallowing difficulties.

Correlation of Temporal Parameters of Laryngeal Excursion by Using Force-Sensing Resistor Sensors with Hyoid Motion in Videofluoroscopic Swallowing Study

“…Noninvasive swallowing study cannot replace VFSS. The noninvasive swallowing study was developed to complete the information obtained from analysis with VFSS [10,35,36,[40][41][42][43][44][45][46][47].…”

Assessment of cough in head and neck cancer patients at risk for dysphagia—An overview

“…100,[103][104][105] Due to its inaccuracy, research has demonstrated the risk of using CA as a stand-alone tool for assessing dysphagia. 97,101,103,104,[106][107][108][109] Comparing healthy swallows and penetration-aspiration swallows with a tri-axial accelerometer, Sejdic et al showed that each axis (three anatomical directions) reported distinct information. 97 This finding suggests that the position and orientation of a sensor influence the recorded signal.…”

“…97,101,103,104,[106][107][108][109] Comparing healthy swallows and penetration-aspiration swallows with a tri-axial accelerometer, Sejdic et al showed that each axis (three anatomical directions) reported distinct information. 97 This finding suggests that the position and orientation of a sensor influence the recorded signal. Movahedi et al have demonstrated that recordings with distinct transducers (microphones and accelerometers) are idiosyncratic and non-interchangeable.…”

“…Some studies have investigated the added value of cervical auscultation (CA) in assessing dysphagia. 97 , 98 , 99 , 100 , 101 , 102 CA consists in listening to swallowing sounds with stethoscopes, microphones, or accelerometers in a patient's natural environment. 100 , 103 , 104 , 105 Due to its inaccuracy, research has demonstrated the risk of using CA as a stand‐alone tool for assessing dysphagia.…”

The effects of compressive sensing on extracted features from tri-axial swallowing accelerometry signals

“…5,6 As these signals are K-sparse signals, we proposed a compressive sensing (CS) approach such that a discrete-time signal of dimension N is encoded by computing a measurement vector y that consists of M ≪ N linear projections of the vector s :…”