Analysis of the suprahyoid muscles during tongue elevation: High-density surface electromyography as a novel tool for swallowing-related muscle assessment.

BACKGROUND: High-density surface electromyography (HD-sEMG) has enabled non-invasive analysis of motor unit (MU) activity and recruitment, but its application to swallowing-related muscles is limited. OBJECTIVE: We aimed to investigate the utility of HD-sEMG for quantitatively evaluating the MU recruitment characteristics of the suprahyoid muscles during tongue elevation. METHODS: We measured the sEMG activity of the suprahyoid muscles of healthy participants during tongue elevation using HD-sEMG. Maximum voluntary contraction (MVC) was measured, followed by data collection during sustained and ramp-up tasks to capture suprahyoid muscle activity. Changes in the temporal/spatial MU recruitment patterns within individual suprahyoid muscles were analysed. RESULTS: This study enrolled 16 healthy young adults (mean age: 27.8 ± 5.3 years; eight males and eight females). Increasing muscle force corresponded to a decrease in modified entropy and correlation coefficient and an increase in the coefficient of variation. No significant differences were observed between male and female participants. CONCLUSION: The results of this study, consistent with those observed in other muscles, such as the vastus lateralis muscle, suggest that HD-sEMG is a valuable and reliable tool for quantitatively evaluating MU recruitment in the suprahyoid muscles. This measurement technique holds promise for novel assessments of swallowing function.

Assessing Dysphagia in the Adult.

This article explores the landscape of dysphagia assessment in adults. Dysphagia, a complex condition affecting the lifespan and many health conditions, significantly compromises individuals' quality of life. Dysphagia is often underdiagnosed, emphasizing the need for comprehensive assessment methods to ensure timely and accurate intervention. It encompasses clinical history, physical examination, clinical and instrumental swallow evaluations. Procedures within each of these modalities are reviewed, highlighting strengths, limitations, and contribution toward a complete understanding of dysphagia, ultimately guiding effective intervention strategies for improved patient outcomes.

Epiglottopexy in Infants Younger Than 6 Months Old: A Case Series.

BACKGROUND: Severe laryngomalacia, characterized by apnea, hypoxia, and feeding difficulties, is an uncommon diagnosis that often requires surgical intervention with supraglottoplasty. Children who require surgery at a young age and those with additional comorbidities pose a special challenge and may require further surgical interventions. Posterior displacement of the epiglottis has been noted in some infants with congenital stridor and is commonly treated with epiglottopexy. The goal of our study is to review the outcomes of epiglottopexy combined with supraglottoplasty in our cohort of infants younger than 6 months old with severe laryngomalacia. METHODS: A retrospective chart review of infants younger than 6 months old who underwent epiglottopexy combined with supraglottoplasty for severe laryngomalacia from January 2018 to July 2021 at a tertiary care children's hospital. RESULTS: 13 patients (age 1.3 week-5.2 months) underwent supraglottoplasty and epiglottopexy for severe laryngomalacia and epiglottis retroflection. The patients were admitted to the intensive care unit and remained intubated for at least one night. All patients demonstrated subjective and objective improvement in upper airway respiratory signs and symptoms. Ten patients demonstrated aspiration immediately postoperatively, despite 4 of them having no concern for aspiration at preoperative evaluation. On follow-up, 1 patient required revision supraglottoplasty and epiglottopexy for persistent laryngomalacia, and 2 patients required tracheostomy tube placement due to cardiopulmonary comorbidities. CONCLUSION: Infants younger than 6 months old with medical comorbidities undergoing epiglottopexy with supraglottoplasty may demonstrate significant improvement in respiratory symptoms. Worsening dysphagia may complicate the postoperative period, particularly among children with medical comorbidities.

Pharyngeal Residue Severity and Aspiration Risk in Stroke Patient Using Fiber-Optic Endoscopic Evaluation of Swallowing.

INTRODUCTION: Pharyngeal residue, defined as the material remaining in the pharynx post-swallow, is a sign of swallowing biomechanical impairment and a clinical predictor of aspiration. This study investigates the correlation between pharyngeal residue severity using the Mansoura FEES Residue Rating Scale (MFRRS) and penetration/aspiration scores using the penetration-aspiration scale (PAS) on FEES. METHODS: Two hundred ten (210) swallows were obtained during standard FEES assessments of thirty patients with poststroke dysphagia. Residue, in both vallecula and the pyriform sinuses' locations, and penetration/aspiration were scored using MFRRS and PAS, respectively. The Spearman's rank-order correlation was used to assess the correlation between residue and PAS scores. The significance of the obtained results was judged at the (p < 0.05) level. RESULTS: Significant strong positive correlations were demonstrated between PAS scores and each vallecular residue score (rs = 0.663, p = 0.000) and pyriform residue score (rs = 0.688, p = 0.001). CONCLUSION: There is a significant strong positive correlation between residue severity and penetration/aspiration in each anatomical site evaluated (valleculae and pyriform sinuses). Our results do not designate one site as riskier than the other because either can contribute to aspiration, but rather demonstrate penetration/aspiration to better correlate with the overall severity of the residue, perhaps as a better marker for pharyngeal inefficiency. This study offers insight into the association of residue severity with swallowing safety and efficiency.

[Effect of acupuncture for dysphagia after stroke based on fiberoptic endoscopic swallowing function evaluation].

OBJECTIVE: To observe the effect of acupuncture combined with regular treatment and swallowing function training on pharyngeal motor, sensory function and penetration-aspiration function in patients with dysphagia after stroke. METHODS: A total of 60 patients with dysphagia after stroke were randomly divided into a control group and an observation group, 30 patients in each group. Both groups were treated with conventional treatment and swallowing function training; in addition, the observation group was treated with acupuncture at Lianquan (CV 23), Fengfu (GV 16), Yifeng (TE 17). All the treatments were given once a day, 5 days a week, for totally 4 weeks. In the two groups, the pharyngeal motor and sensory function, penetration-aspiration scores were evaluated by fiberoptic endoscopic evaluation of swallowing (FEES), and the Kubota water swallowing test scores were assessed before and after treatment, and the clinical effects were compared. RESULTS: After treatment, the pharyngeal motor and sensory function in the two groups were all higher than those before treatment (P<0.05), and those in the observation group were better than the control group (P<0.05). After treatment, the penetration-aspiration scores and Kubota water swallowing test scores in the two groups were all lower than those before treatment (P<0.05), and those in the observation group were lower than the control group (P<0.05). The total effective rate was 93.3% (28/30) in the observation group, which was better than 73.3% (22/30) in the control group (P<0.05). CONCLUSION: Acupuncture combined with regular treatment and swallowing training could improve the pharyngeal motor and sensory function, and penetration-aspiration scores in patients with dysphagia after stroke.

Swallowing Function in COVID-19 Patients After Invasive Mechanical Ventilation.

OBJECTIVE: To explore swallowing function and risk factors associated with delayed recovery of swallowing in patients with COVID-19 post-invasive mechanical ventilation using the Functional Oral Intake Scale (FOIS). DESIGN: Longitudinal cohort study. SETTING: Three secondary-level hospitals. PARTICIPANTS: Invasively ventilated patients (N=28) who were hospitalized with severe COVID-19 and referred to the hospitals' speech and language pathology (SLP) departments after mechanical ventilation between March 5 and July 5, 2020 for an evaluation of swallowing function before commencing oral diet. INTERVENTIONS: SLP assessment, advice, and therapy for dysphagia. MAIN OUTCOME MEASURES: Oral intake levels at baseline and hospital discharge according to the FOIS. Patients were stratified according to FOIS (1-5, dysphagia; 6-7, functional oral intake). Data regarding comorbidities, frailty, intubation and tracheostomy, proning, and SLP evaluation were collected. RESULTS: Dysphagia was found in 71% of the patients at baseline (79% men; age, 61±12y; body mass index, 30±8 kg/m2). The median FOIS score at baseline was 2 (interquartile range [IQR], 1) vs 5 (IQR, 2.5) at hospital discharge. Patients with dysphagia were older (64±8.5y vs 53±16y; P=.019), had a higher incidence of hypertension (70% vs 12%; P=.006), and were ventilated invasively longer (16±7d vs 10±2d; P=.017) or had a tracheostomy (9±9d vs 1±2d; P=.03) longer. A negative association was found between swallowing dysfunction at bedside and days hospitalized (r=-0.471, P=.01), and number of days in the intensive care unit (ICU) (r=-0.48, P=.01). CONCLUSION: Dysphagia is prevalent in COVID-19 patients after invasive mechanical ventilation and is associated with number of days in hospital and number of days in the ICU. Swallowing function and tolerance of oral diet improved at discharge (P<.001).

Effect of acupuncture for dysphagia after stroke based on fiberoptic endoscopic swallowing function evaluation / 中国针灸

OBJECTIVE@#To observe the effect of acupuncture combined with regular treatment and swallowing function training on pharyngeal motor, sensory function and penetration-aspiration function in patients with dysphagia after stroke.@*METHODS@#A total of 60 patients with dysphagia after stroke were randomly divided into a control group and an observation group, 30 patients in each group. Both groups were treated with conventional treatment and swallowing function training; in addition, the observation group was treated with acupuncture at Lianquan (CV 23), Fengfu (GV 16), Yifeng (TE 17). All the treatments were given once a day, 5 days a week, for totally 4 weeks. In the two groups, the pharyngeal motor and sensory function, penetration-aspiration scores were evaluated by fiberoptic endoscopic evaluation of swallowing (FEES), and the Kubota water swallowing test scores were assessed before and after treatment, and the clinical effects were compared.@*RESULTS@#After treatment, the pharyngeal motor and sensory function in the two groups were all higher than those before treatment (P<0.05), and those in the observation group were better than the control group (P<0.05). After treatment, the penetration-aspiration scores and Kubota water swallowing test scores in the two groups were all lower than those before treatment (P<0.05), and those in the observation group were lower than the control group (P<0.05). The total effective rate was 93.3% (28/30) in the observation group, which was better than 73.3% (22/30) in the control group (P<0.05).@*CONCLUSION@#Acupuncture combined with regular treatment and swallowing training could improve the pharyngeal motor and sensory function, and penetration-aspiration scores in patients with dysphagia after stroke.

Simultaneous evaluation of symptoms, swallowing functions, and patient-reported swallowing difficulties and their correlations with ingestion status during definitive chemoradiotherapy for oropharyngeal and hypopharyngeal cancer.

PURPOSE: To clarify the correlations among symptoms, swallowing functions, and ingestion status and to validate a method of swallowing evaluation during chemoradiotherapy (CRT) for head and neck cancer. METHODS: Oropharyngeal and hypopharyngeal cancer patients who were to receive definitive CRT as initial treatment were included in this prospective, single-center, observational study. The Functional Oral Intake Scale (FOIS) for ingestion status and grades of symptoms (dryness, dysgeusia, mucositis, and the analgesic ladder); the Yale Pharyngeal Residue Severity Rating Scale on fiberoptic endoscopic evaluation of swallowing (FEES) and the Penetration-Aspiration Scale (PAS) on videofluoroscopic (VF) evaluation for swallowing functions; and the 10-item Eating Assessment Tool (EAT-10) questionnaire were assessed at 5 time points unless the participant refused. The FEES and VF evaluation findings at each point were also compared. RESULTS: There were 38 participants. Dysgeusia, mucositis, and pain grade, as well as the FOIS score, were the worst at 70 Gy and then improved after treatment. The improvements of pharyngeal residue and the PAS after treatment were limited. The EAT-10 and the pain ladder were highly correlated with the FOIS changes at many time points. The VF evaluation rate dropped after 40 Gy, whereas the FEES rate remained high. There were good correlations between pharyngeal residue and the PAS at 0 Gy, 70 Gy, and 3 months. CONCLUSION: The EAT-10 and pain reflected the FOIS score changes well, while two swallowing evaluations did not. To avoid aspiration, VF evaluation may not be necessary during CRT because of high correlations with pharyngeal residue on FEES.

Assessing Hyolaryngeal Excursion: Comparing Quantitative Methods to Palpation at the Bedside and Visualization During Videofluoroscopy.

PURPOSE: Hyolaryngeal excursion (HE) is typically assessed via palpation during clinical swallowing exams (CSE) or visually during videofluoroscopy (VFSS). Minimal evidence exists to support the use of these perceptual methods for judging HE. We investigated whether binary judgment of HE differentiates quantitative measures of hyoid movement, using frame-by-frame VFSS analysis to measure anatomically scaled peak hyoid positions. METHODS: Medical records of patients who received a CSE and VFSS within a 24-h period were reviewed. Clinician ratings of HE ('reduced' or 'normal') were collected from CSE and VFSS reports, along with rater experience. Five ml puree swallows were extracted from each VFSS for randomized, blinded analysis. Peak hyoid position from C4 was captured in anterior, superior, and hypotenuse positions and expressed relative to C2-C4 length. T-test comparisons of hyoid positions between patients judged to have reduced versus normal HE on palpation and VFSS were conducted. RESULTS: Eighty-seven patients (56 male, mean age 61) met criteria. Peak anterior hyoid position was significantly different between patients judged to have reduced (mean = 89.2% C2-C4) and normal (mean = 110.6% C2-C4) HE on palpation (p = 0.001). Further analysis revealed no effect of clinician experience on differentiation of objective measures based on palpation. No differences were found across any objective measures when compared to clinician VFSS ratings. CONCLUSIONS: Clinicians appeared to be able to differentiate peak anterior hyoid movement but not superior or hypotenuse movement on palpation. On VFSS visualization, no significant differences were found between swallows judged to have reduced versus normal HE in any directional dimension. While perceptual methods may contribute to clinical decision-making, clinicians should remain cautious when making judgments about HE using these methods.

Aspiration: diagnostic contributions from bedside swallowing evaluation and endoscopy.

The aim of this study was to identify which characteristics, collected by bedside swallowing evaluation (BSE) and fiberoptic endoscopic evaluation of swallowing (FEES), are a risk or a protective factor for aspiration. This retrospective study included data on 1577 consecutive patients, collected by BSE and FEES. Bivariate analysis was performed to verify the association of each variable with aspiration (Chi-Square test). The variables associated with aspiration were entered into a multivariate logistic model to quantify this association. Several variables were significantly associated (p < 0.05) with aspiration; cooperation, sensation, laryngeal elevation and direct therapy were found to be protective factors against aspiration. The regression model identified the most variables related with aspiration, among which tracheotomy, material pooling and spillage. Patients able to perform dry swallows were 77% less likely to aspirate (protective factor). Several variables are involved in protection of airways during swallowing. Their interaction, in patients with swallowing disorders, offers the clinician the best means of interpreting BSE and FEES.

First Step in Telehealth Assessment: A Randomized Controlled Trial to Investigate the Effectiveness of an Electronic Case History Form for Dysphagia.

The need for developing effective telehealth tools for dysphagia management is high not only for people who live in rural areas, but also for individuals with mobility/access limitations. We aimed to develop an electronic case History Tool/form (thereafter, e-HiT) for dysphagia, and compare its effectiveness with its paper-based version (PBV) on completion time, completeness, independence, and patient perceptions/satisfaction. Secondarily, we examined associations between the aforementioned variables and predictor variables, such as age, cognition, and computer/internet use. Forty adults who expressed concerns with eating/swallowing participated. To compare both versions, a randomized, controlled two-period crossover design was used. In Visit 1, Group A completed the e-HiT and Group B completed the PBV. In Visit 2, Group A completed the PBV and Group B completed the e-HiT. A satisfaction survey was completed post visits. There were no statistically significant differences for completion time (p = 0.743), completeness (p = 0.486), and independence (p = 0.738). Patient perception/satisfaction was significantly higher with the e-HiT (p = 0.004). In addition, a significant association was found between completion time and age (p = 0.0063). Our results indicate that completing the e-HiT is as time efficient as completing the PBV and that both forms elicit the same amount of information with no or minimal support. Also, completion of the e-HiT yielded significantly higher satisfaction responses. This is the first study documenting the effectiveness of the e-HiT for outpatients with dysphagia, providing evidence that the first step of a swallowing assessment-case history completion-can be effectively completed via telehealth by individuals with reliable internet connection and basic computer literacy skills.

How does radiotherapy impact swallowing function in nasopharynx and oropharynx cancer? Short-term results of a prospective study.

The objective of this study is to report the initial results of a prospective trial assessing instrumental deglutition function in nasopharynx and oropharynx cancers after radio or chemoradiotherapy using intensity-modulated radiotherapy (IMRT). IMRT was delivered aiming to spare the swallowing organ at risk (SWOARs) for Stage II-IV naso- and oropharynx cancer. Objective instrumental assessment included videofluoroscopy (VFS), fiberoptic endoscopic evaluation of swallowing (FEES) and oro-pharyngeal-oesophageal scintigraphy (OPES) at baseline and at 1 month after radiotherapy. Dysphagia parameter scores were calculated at each exam after liquid (L) and semi-liquid (SL) bolus intake: pre-deglutition penetration, aspiration, pharyngeal transit time (PTT) and hypopharyngeal retention index (HPRI). Overall, 20 patients (6 nasophaynx and 14 oropharynx) completed treatment and instrumental assessment after 1 month. Comparison between pre- and post-treatment HPRI score values showed a significant worsening in both FEES-L (p = 0.021) and SL (p = 0.02) and at VFS-L (p = 0.008) and SL (p = 0.005). Moreover, a relationship between HPRI worsening at FEES-L and FEES-SL (p = 0.005) as well as at VFS-L and VFS-SL (p < 0.001) was observed. PTT was not significantly affected by radiotherapy (p > 0.2). Only a few patients experienced pre-deglutition penetration (1 patient with base of tongue cancer at FEES-L and SL) and aspiration (1 patient with nasopharynx cancer at OPES-L and FEES-SL) after radiotherapy. Our early results showed that IMRT-SWOARs sparing caused a significant increase in the post-deglutition HPRI score. Longer follow-up will be necessary to evaluate if the increase of HPRI is related to a high risk of developing late aspiration.

Validation of the Hebrew Version of the Eating Assessment Tool-10 (H-EAT-10).

BACKGROUND AND OBJECTIVES: Dysphagia is a common disability with different etiologies. In order to measure dysphagia symptom severity and effects on quality of life, the Eating Assessment Tool (EAT-10) was developed and validated in the English language. We aimed to develop a Hebrew version of the EAT-10 and to evaluate its internal consistency, test-retest reliability, and validity in Hebrew-speaking adults with dysphagia. SUBJECTS AND METHODS: The Hebrew EAT-10 (H-EAT-10) questionnaire was completed by 132 patients: 56 patients with dysphagia and 76 controls. Internal consistency analysis was calculated using Cronbach α, and test-retest reliability was calculated using intraclass correlation coefficient in order to assess clinical validity. RESULTS: Internal consistency and test-retest reliability were found to be high in the H-EAT-10 (Cronbach α = 0.955 and intraclass correla tion = 0.98). In addition, H-EAT-10 scores in the dysphagia group were found to be significantly higher than those in the control group (p < 0.001). CONCLUSION: This study demonstrated that H-EAT-10 is a reliable and valid tool that may be implemented for clinical practice and research on dysphagia in a Hebrew-speaking population.

To Cough or Not to Cough? Examining the Potential Utility of Cough Testing in the Clinical Evaluation of Swallowing.

PURPOSE: The clinical swallowing evaluation (CSE) represents a critical component of a comprehensive assessment of deglutition. Although universally utilized across clinical settings, the CSE demonstrates limitations in its ability to accurately identify all individuals with dysphagia. There exists a need to improve assessment and screening techniques to improve health outcomes, treatment recommendations and ultimately mortality in individuals at risk for dysphagia. The following narrative review provides a summary of currently used validated CSE's and examines the potential role of cough testing and screening in the CSE. RECENT FINDINGS: Recent evidence highlights a relationship between objective physiologic measurements of both voluntarily and reflexively induced cough and swallowing safety status across several patient populations. Although more research is needed across a wider range of patient populations to validate these findings; emerging data supports the consideration of inclusion of cough testing during the CSE as an index of airway defense mechanisms and capabilities in individuals at risk for aspiration. SUMMARY: The sensorimotor processes of cough and swallowing share common neuroanatomical and functional substrates. Inclusion of voluntarily or reflexively induced cough testing in the CSE may aide in the identification of dysphagia and reduced airway protection capabilities.

Prospective Comprehensive Swallowing Evaluation of Minimally Invasive Esophagectomies with Cervical Anastomosis: Silent Versus Vocal Aspiration.

INTRODUCTION: Pneumonia and tracheal aspiration remain problematic following esophagectomy. We hypothesized that the incidence of postesophagectomy pneumonia occurs in part because of swallowing dysfunction and more importantly silent tracheobronchial aspiration. Therefore, we instituted a routine prospective formal swallowing evaluation to determine if the aspiration rate and its associated morbidity can be decreased by early identification of patients with silent or vocal aspiration. METHODS: Patients undergoing minimally invasive McKeown esophagectomy and receiving neoadjuvant chemoradiotherapy (NACR) were prospectively enrolled between December 2013 to January 2015. A standardized cineradiography observation utilizing the Rosenbek penetration-aspiration (RPA) scale was used to rule out anastomotic leak and/or aspiration. RESULTS: Of 27 patients evaluated, twelve patients were noted to have silent (n = 8) or vocal (cough n = 4) aspiration of thin liquid (n = 8) or nectar-thick consistency (n = 4) on their initial study. Three patients were noted to have an anastomotic leak and vocal aspiration on their initial study. Eight of the nine patients who aspirated but did not have an anastomotic leak on their initial study had a repeat RPA study prior to discharge showing improvement from the initial study. Six patients (22 %) had vocal cord paresis and clinical hoarseness, but only two patients who had clinical diagnosis of pneumonia were noted to have vocal cord paresis and silent aspiration. CONCLUSIONS: Swallowing dysfunction remains a common problem after minimally invasive esophagectomy (MIE) with cervical anastomosis and can be readily identified. Silent aspiration likely contributes to pneumonia after MIE.

Comparison of cough reflex test against instrumental assessment of aspiration.

BACKGROUND: Silent aspiration is associated with pneumonia and mortality, and is poorly identified by traditional clinical swallowing evaluation (CSE). The aim of this study was to validate cough reflex testing (CRT) for identification of silent aspiration against aspiration confirmed by instrumental assessment. METHODS: Cough reflex threshold testing was completed on all patients using inhaled, nebulised citric acid. Within an hour, 80 patients underwent videofluoroscopic study of swallowing (VFSS) and 101 patients underwent fibreoptic endoscopic evaluation of swallowing (FEES). All tests were recorded and analysed by two researchers blinded to the result of the alternate test. RESULTS: Significant associations between CRT result and cough response to aspiration on VFSS (X(2) (2)=11.046, p=.003) and FEES (X(2) (2)=34.079, p<.001) were identified. Sensitivity and specificity were optimised at 0.6mol/L in patients undergoing VFSS (71%, 60% respectively) and at 0.4mol/L in patients undergoing FEES (69%, 71% respectively). A concentration of 0.8mol/L had the highest odds ratio (OR) for detecting silent aspiration (8 based on VFSS; 7 based on FEES). CONCLUSION: CRT results are significantly associated with aspiration response on instrumental assessment. Lower concentrations of citric acid provide a better predictive measure of silent aspiration.

The validity and reliability of Tengdao's swallowing evaluation for stroke patients with dysphagia / 中华物理医学与康复杂志

Objective To study the validity and reliability of Tengdao's swallowing standard for stroke pa-tients with dysphagia.Methods A total of 128 patients with postroke dysphagia took the swallowing test and then were divided into three sub-groups.Their scores on Tengdao's evaluation and their fluoroscopy results were analyzed using Spearman's correlation coefficient.Intra-class coefficients (ICCs)were used to examine the intra-rater and in-ter-rater reliability of Tengdao's evaluation.Results TenIgdao's evaluation possessed good validity and reliability.There was a high correlation between the scores in Tengdao's evaluation and fluoroscopy results. Conclusions Tengdao's evaluation is valid,reliable,simple and safe.It can be used in the clinic to evaluate the stroke patients with dysphagia.