Muscle Tension Dysphagia: Contributing Factors and Treatment Efficacy

Impact of Patient Factors on Attendance at Remote Telehealth Swallow Therapy

In-person swallow therapy is a primary and effective treatment for dysphagia. However, remote telehealth is now a widely utilized component of healthcare delivery for therapeutic interventions. This study evaluates potential factors influencing attendance at telehealth swallow therapy. Retrospective review of 308 patients referred for telehealth swallow therapy from April 2020-November 2021 included patient referral diagnosis, diagnostic swallowing evaluations, and sociodemographic information including age, race, health insurance, interpreter use, and socioeconomic status. Univariable and multivariable analyses compared patient and appointment factors for those who attended telehealth swallow therapy with those who did not attend. Overall, 71.8% of patients attended at least one telehealth swallow therapy appointment while 28.2% did not attend any. The most common referral diagnoses were "Cancer" (19.2%) and "Dysphagia Unspecified" (19.2%). Patients diagnosed with "Cancer" and "Muscle Tension" were significantly less likely to attend telehealth swallow therapy compared to those with "Dysphagia Unspecified," "Globus," and "Gastroesophageal Reflux Disease/Laryngopharyngeal Reflux" after adjusting for covariates. Lower socioeconomic status (p = 0.023), no interpreter use (p < 0.001), and more diagnostic evaluations (p = 0.001) correlated with higher telehealth swallow therapy attendance. Race and sex did not correlate with attendance. Most patients referred to telehealth swallow therapy attended at least one appointment. Patients with dysphagia associated with cancer and muscle tension, those with higher socioeconomic status, interpreter use, and fewer diagnostic swallowing evaluations were less likely to attend telehealth swallow therapy. Future research should investigate and compare attendance and efficacy of telehealth swallow therapy with in-person therapy.

Zebras in Adult Dysphagia Workup: Where to Look When You Think You Have Looked Everywhere

While many patients who present with dysphagia have a clinically identifiable cause of dysphagia, the etiology of swallowing difficulty is oftentimes a diagnostic enigma. The aim of this article is to review possible etiologies of dysphagia when objective evidence of dysphagia is lacking. Included in this discussion are cricopharyngeal spasm, retrograde cricopharyngeal dysfunction, muscle tension dysphagia, dysphagia secondary to medications, and functional dysphagia.

Muscle Tension Dysphagia: An Expanded Investigation of Clinical Presentations and Swallowing Kinematics

PURPOSE

This study retrospectively examined patient-reported symptoms, quality of life, and swallowing kinematics in individuals with presumed muscle tension dysphagia (MTDg).

METHOD

Twenty-six individuals met the inclusion criteria. Data were gathered from patient-reported outcome measures (PROs), symptomology, clinician reports of palpation, and hyolaryngeal and hyoid movements measured on a 20-ml thin liquid bolus during videofluoroscopic swallowing studies.

RESULTS

All PROs were outside of typical limits, except for the Voice Handicap Index-10. Mean hyoid excursion was 1.52 cm (SD = 0.46, range: 0.76-2.43), and hyolaryngeal excursion was 0.77 cm (SD = 0.44, range: -0.42-1.68). A minority of participants (4%-19%) demonstrated atypical hyoid and/or hyolaryngeal excursion compared to the available normative reference value sets.

CONCLUSIONS

Individuals demonstrated abnormalities in the clinical evaluation of the areas of palpation and reported perilaryngeal discomfort and symptoms of laryngeal hyperresponsiveness, with a negative impact on their quality of life across various PROs. Atypical hyoid and/or hyolaryngeal excursion during swallowing was rare when compared to available normative reference values. The clinical evaluation of MTDg may be enhanced by including components related to muscle tension and laryngeal hyperresponsiveness in order to differentiate MTDg from idiopathic functional dysphagia and lead the patient to the otolaryngology/speech-language pathology clinic for intervention and management.

The role of laryngeal hypersensitivity in dysphagia: A scoping review with embedded stakeholder involvement

BACKGROUND

Based on stakeholder conversations, speech and language therapists have anecdotally observed cases of dysphagia with suspected laryngeal hypersensitivity. These presentations have been coined as 'muscle tension dysphagia' often with concurrent laryngeal sensitivity symptoms. However, the role of laryngeal hypersensitivity in dysphagia is not fully understood. Knowledge user engagement highlights a lack of clarity around diagnosis and investigative approaches, limited clinical guidance and inconsistent practice, which leads to inequity in service delivery and care.

AIM

To identify and present the published literature regarding the definitions and clinical identification tools used during the management of laryngeal hypersensitivity related dysphagia.

METHODS & PROCEDURES

A scoping review was conducted following Joanna Briggs Institute methodology and EQUATOR PRISMA-ScR guidance. Patient and stakeholder engagement was embedded at each review stage. The protocol was registered with the Open Science Framework: DOI 10.17605/OSF.IO/CUXYN. A multidatabase search strategy identified literature published between 2012 and 2022. A narrative description was used to report the study findings.

OUTCOMES & RESULTS

The search identified 2590 citations. The full paper screening was completed on 88 studies, with 17 studies included in data extraction. There was a wide range of terminology and assessment approaches which varied across different clinical settings. The most cited term was 'muscle tension dysphagia'. The most common assessments tools were videofluoroscopy, fibreoptic endoscopic evaluation of swallowing and videostroboscopy, predominantly used in speech and language therapy and/or Ear, Nose and Throat settings. Gastroesophageal and respiratory investigations were less frequently cited.

MAIN CONTRIBUTION

This review details the current evidence related to the terminology and assessment tools cited in laryngeal hypersensitivity related dysphagia to improve clinician knowledge and understanding. Patient and stakeholder involvement indicated that future research needs to: optimize consensus of terminology, and improve consistent identification methods, service provision and treatment approaches.

CONCLUSIONS & IMPLICATIONS

This review highlights the lack of consistent terminology across the literature. A wide range of assessment tools report nonspecific positive clinical features and a lack of significant instrumental assessment findings. Patients and stakeholders identify the research priorities should improve clinician awareness, knowledge, guidance and evidence to support patient care.

WHAT THIS PAPER ADDS

What is already known on the subject Swallowing difficulties can occur in adults for a number of different reasons, such as neurological, respiratory or physiological conditions. Swallowing difficulties with no evidence of biomechanical or structural impairment on instrumental assessment and of unknown cause (termed idiopathic functional dysphagia or medically unexplained dysphagia) is a poorly understood phenomenon. More recently, concurrent oropharyngeal dysphagia and laryngeal hypersensitivity and/or muscle tension have been posited as a potential underlying mechanism. What this study adds to the existing knowledge This scoping review contributes to our expanding knowledge of the role of laryngeal hypersensitivity in dysphagia by providing an overview of the current evidence related to the terminology and assessment tools reported in the literature. Embedded patient and stakeholder involvement further deepens real-world insights into the increased referrals for these individuals with increasing uncertainty in how to best assess, manage and support patients. Patients equally have reported that reduced professional awareness and inequalities in service delivery pathways result in poor patient experience and quality of life, and healthcare economic burden. What are the potential or actual clinical implications of this work? This scoping review draws our attention to an area of practice which has received little attention in both clinical practice and academic research. First, the study raises awareness of this population and the impact for services, speech and language therapists and clinicians; and second, highlights evidence-practice gaps with seldom consistency in the use of terminology and assessment approaches. The study provides priority research themes to expand our knowledge and understanding, as guided by the literature and patient and stakeholder input.

Examining the Influence of Chemosensation on Laryngeal Health and Disorders

Inhaled airborne stimuli are associated with laryngeal disorders affecting respiration. Clinically, several themes emerged from the literature that point to specific gaps in the understanding and management of these disorders. There is wide variation in the types of airborne stimuli that trigger symptoms, lack of standardization in provocation challenge testing using airborne stimuli, and vague reporting of laryngeal symptoms. Scientifically, evidence exists outside the field of voice science that could prove useful to implement among patients with impaired laryngeal-respiration. To expand this area of expertise, here we provide a thematic overview of relevant evidence and methodological tools from the discipline of chemosensory sciences. This review provides distinctions across the three chemosensory systems of olfaction, trigeminal chemesthesis, and gustation, guidance on selecting and delivering common chemosensory stimuli for clinical testing, and methods of quantifying sensory experiences using principles of human psychophysics. Investigating the science of chemosensation reveals that laryngeal responses to inhaled airborne stimuli have explanations involving physiological mechanisms as well as higher cognitive processing. Fortunately, these findings are consistent with current pharmacological and nonpharmacological interventions for impaired laryngeal-respiration. Based on the close relationships among inhaled airborne stimuli, respiration, and laryngeal function, we propose that new perspectives from chemosensory sciences offer opportunities to improve patient care and target areas of future research.

Features and impact of dysphagia, dysphonia and laryngeal hypersensitivity in whiplash associated disorder - a qualitative study

PURPOSE

Investigation into dysphagia, dysphonia and laryngeal hypersensitivity after whiplash is limited, offering minimal insight into specific features and impact. This study aimed to explore these symptoms.

MATERIALS AND METHODS

A qualitative interpretive description design was used. Eleven participants with chronic Whiplash Associated Disorder and self-reported swallowing, voice and/or throat-related problems completed baseline symptom questionnaires and were offered a videofluroscopic swallow study to investigate baseline swallowing biomechanics. Semi-structured interviews were conducted to explore features of swallowing, voice and laryngeal sensory complaints and analysed using thematic analysis.

RESULTS

There were high baseline levels of self-reported neck, pain- and throat-related disability and psychological distress. There was no evidence of baseline deficits in swallow biomechanics. Thematic analysis revealed 5 themes: (1) A range of features of dysphagia and dysphonia exist after whiplash with varied clinical course; (2) Activity and participation in swallow and voice activities have changed; (3) There are psychological and emotional impacts; (4) Features of laryngeal hypersensitivity co-exist and (5) There are barriers to management.

CONCLUSIONS

Swallow, voice and laryngeal sensory problems after whiplash were described, with impacts on quality of life and barriers to management. These insights broaden understanding of post-whiplash sequalae, indicating the need for better detection.Implications for rehabilitationDysphagia, dysphonia and laryngeal hypersensitivity are under-recognised consequences of whiplash.Individuals presenting with dysphagia, dysphonia and laryngeal sensory symptoms after whiplash experience significant implications to wellbeing, activity and participation.Improved understanding of these symptoms may facilitate better detection and subsequent referral to speech-language pathology.Greater understanding into the functional and psychosocial implications of these symptoms may guide more effective post-whiplash assessments and informed rehabilitation.

Telepractice Considerations for Evaluation and Treatment of Voice Disorders: Tailoring to Specific Populations

PURPOSE

The aim of this clinical focus article is to provide recommendations for implementation of telepractice services for the evaluation and treatment of voice disorders and to use case examples to highlight the advantages of this modality of service delivery.

METHOD

In this clinical focus article, key factors for successful telepractice evaluation and treatment of voice and related disorders are discussed relative to clinical outcome measures. Case examples of telepractice voice therapy are described for a pediatric, transgender, and chronic cough client including associated acoustic, auditory-perceptual, and quality-of-life treatment outcomes.

RESULTS

Acoustic, perceptual, and quality-of-life outcome measures demonstrated functional voice improvements after treatment using the telepractice modality. The pediatric client showed decreased perceptual voice strain and increased speech intelligibility. The transgender client showed increased habitual speaking fundamental frequency (pitch) and quality of life. The chronic cough client showed improved vocal hygiene and reduced cough severity.

CONCLUSIONS

A review of the literature shows comparable outcomes for in-person and telepractice voice therapy, but special considerations must be made to ensure therapeutic success. We present three representative types of voice cases that illustrate implementation of voice evaluation and treatment using the telepractice modality. In all three cases, the clients' personal therapeutic goals were achieved without needing to travel to the clinic. Furthermore, asynchronous practice opportunities were found to be positive byproducts of using the telepractice modality.

The Impact of Functional Laryngoscopy on the Diagnosis of Laryngeal Hypersensitivity Syndromes

BACKGROUND

Chronic cough and vocal cord dysfunction are manifestations of laryngeal hypersensitivity syndrome.

OBJECTIVE

The aim of the study was to determine the clinical utility of functional transnasal laryngoscopy in patients with laryngeal hypersensitivity syndromes.

METHODS

This study was a prospective observational cross-sectional study design of 71 participants with laryngeal hypersensitivity syndrome referred for functional transnasal laryngoscopy. Participants had a clinical assessment with a speech pathologist after which a provisional diagnosis of chronic cough, suspected vocal cord dysfunction, suspected muscle tension dysphonia, or a combination was made. A laryngoscopy with provocation was performed and the diagnosis revised after which the provisional and revised diagnoses were compared.

RESULTS

The diagnosis changed in 67% of participants after laryngoscopy. Vocal cord dysfunction was diagnosed in an additional 17 cases when not expected clinically but discounted when suspected clinically in 12 participants. Muscle tension dysphonia was diagnosed in an additional 31 cases when not suspected clinically and not confirmed when suspected in 2.

CONCLUSION

This study demonstrated that conditions such as muscle tension dysphonia and vocal cord dysfunction cannot be diagnosed based on symptoms alone. In addition to diagnostic accuracy, functional laryngoscopy enhances treatment planning and provides immediate feedback regarding laryngeal movement during respiration and phonation.

Clinical and Electromyographic Assessment of Swallowing in Individuals with Functional Dysphonia Associated with Dysphagia Due to Muscle Tension or Atypical Swallowing

Introduction: Over the past few years, attention has been paid to the coexistence of dysphonia with dysphagia, in the context of functional disorders. The aim of this work was to objectify logopaedic examination of dysphonic patients with coexisting swallowing difficulties by surface electromyography. Methods: The material of the work included 58 patients with muscle tension dysphonia (MTD). Each patient underwent otolaryngologic, phoniatric and logopaedic examination. We collected information about medical history and asked patients to fill out Reflux Symptom Index (RSI), Eating Assessment Tool (EAT-10), Dysphagia Handicap Index (DHI) and Swallowing Disorder Scale (SDS). The algorithm of dysphagia diagnostics in our clinic assumes parallel surface electromyography (SEMG) during Functional Endoscopic Evaluation of Swallowing. Results: In comparison to patients suffering from atypical swallowing, patients with muscle tension dysphagia (MTDg) obtained higher values from almost all questionnaires. Logopaedic evaluation revealed abnormalities in the structure and efficiency of the articulatory organs and in the assessment of primary functions. Patients with more abnormalities in logopaedic examination had significantly higher infrahyoid muscle activity during swallowing observed in EMG. Patients with non-normative swallowing pattern had significantly greater asymmetry of the average and maximum amplitude of masseters, as well as submental muscles. Patients with higher percent of muscles asymmetry gained higher scores in questionnaires. Conclusions: Surface electromyography objectifies logopaedic examination of patients with swallowing difficulties. The results of this work showed that, apart from longer swallows, patients with MTDg differ from patients with non-normative swallowing patterns in the muscle activity measured by SEMG, abnormalities in logopaedic evaluation and the severity of complaints reported by patients.

Self-reported Dysphagia and Pharyngeal Volume Following Whiplash Injury

Difficulty swallowing has been reported following whiplash injury; however, the reasons remain poorly understood. A possible factor may be the observed changes in pharyngeal volume. The current exploratory study was designed to examine the prevalence of self-reported dysphagia after whiplash and the relationship with recovery status and change in pharyngeal volume. Data were available from a longitudinal study of adults with whiplash. Data included magnetic resonance imaging (MRI) of the cervical spine, the Dysphagia Handicap Index (DHI), and Neck Disability Index (NDI) collected over four timepoints (< 1 week, 2 weeks, 3 months, and 12 months post-injury). Initial cross-sectional analysis examined 60 patients with DHI data from at least one timepoint. A second, longitudinal analysis was conducted on 31 participants with MRI, NDI, and DHI data at both early (< 1-2 weeks) and late (3-12 months) timepoints. The pharynx was contoured on axial T2-weighted MRI slices using OsiriX image processing software and pharyngeal volume (mm³) was quantified. In the 60-patient cohort, prevalence of self-reported dysphagia (DHI ≥ 3) was observed in 50% of participants at least once in 12 months (M = 4.9, SD 8.16, range 0-40). In the longitudinal cohort (n = 31), mean total DHI significantly (p = 0.006) increased between early and late stages. There was no relationship (p = 1.0) between dysphagia and recovery status, per the NDI% score. Pharyngeal volume remained stable and there was no relationship between dysphagia and pharyngeal volume change (p = 1.0). This exploratory study supports the need for further work to understand the nature of dysphagia, extent of functional compromise, and the underlying pathophysiology post-whiplash.