A new radiological parameter as a predictor of dysphagia based on oro-pharyngeal stenosis in a cohort of pediatric patients undergoing mal-reduced C1-2 pedicle screw fixation

PURPOSE

C1 pedicle screw technique showed further advantages since it avoids the negative results from the sacrificed range of motion of the atlantooccipital joint compared to the occipitocervical fusion. However, some intractable complications are unavoidable. In the pediatric population, dysphagia after the atlantoaxial fixation can be accidentally serious. We aimed to determine the incidence of dysphagia in the pediatric population's cohort and its radiological predictor.

METHODS

Between January 2010 and August 2018, this retrospective study included 42 pediatric patients with atlantoaxial dislocation due to trauma. They were followed up with an average duration of 8 years (range 5-18 years). Twenty-seven were males and 15 females with a mean age of 8.2 years (range 5-15 years) when undergoing operations. Patients were classified according to the presence of postoperative dysphagia according to the Bazaz dysphagia grading scale. The measurements, including pre- and postoperative CVT/NSL, O-C2, and C2-C7 sagittal angles, were performed.

RESULTS

26.2% of the patients (11/42) experienced postoperative dysphagia. A significant difference in the postoperative CVT/NSL (115.2 ± 13.2 vs.134.8 ± 17.3, P = 0.002), ΔCVT/NSL (7.0 ± 11.2 vs. 20.3 ± 10.5, P = 0.001), ΔO-C2 (- 3.2 ± 5.8 vs. 2.1 ± 5.1, P = 0.026), postoperative nPAS (9.4 ± 3.7 vs. 12.6 ± 4.2, P = 0.031) and ΔPAS (- 1.5 ± 4.1 vs. 2.0 ± 3.5, P = 0.010) between dysphagia group and non-dysphagia group were found. Adjustment for age, gender, and BMI, the multivariate logistic analysis showed that ΔCVT/NSL < 8.35° (OR = 5.23; 95% CI 4.97-5.50; P = 0.001) and ΔO-C2 (OR = 3.34; 95% CI 3.17-3.51; P = 0.001) remained associated with the occurrence of the swallowing problems.

CONCLUSION

In comparison with ΔO-C2, ΔCVT/NSL might better predict postoperative dysphagia in children.

LEVEL OF EVIDENCE I

Diagnostic: individual cross-sectional studies with consistently applied reference standard and blinding.

[The role of oropharyngoesophageal scintigraphy in the assessment of dysphagia in neurological patients.]

PURPOSE

The aim of this study was to assess the role of oropharingoesophageal scintigraphy (OPES) in the management of neurological patients, investigating the clinical value of semiquantitative analysis.

MATERIALS AND METHODS

We enrolled 39 neurological patients clinically evaluated and scored according to the Dysphagia Outcome Severity Scale (DOSS) scale who underwent fibrolaryngoscopic swallowing examination (FEES) and OPES using a 99mTc-nanocolloid-radioblabelled semiliquid bolus. We calculated the following semiquantitative parameters: Oral Transit Time (OTT), Pharyngeal Transit Time (PTT), Esophageal Transit Time (ETT), Retention Index (RI), and Esophageal Emptying Rate (EER10s). Differences in OPES semiquantitative parameters between patients classified according to the DOSS scale were performed using the nonparametric Mann-Whitney U test. Optimal semiquantitative parameters cut-off values that correlated with DOSS classification were investigated with ROC curves. The agreement between OPES, FEES and DOSS results was measured using Cohen's Kappa test (K).

RESULTS

A significantly higher OTT (p=0.028), PTT (p=0.011) and ETT (p=0.030) and lower EER10s (p=0.016) values were identified. Moderate agreement resulted between OPES and DOSS results (k=0.429, 95%CI: 0.143-0.715, p=0.002).

CONCLUSIONS

Our study revealed a significant correlation between clinical dysphagia graded using DOSS scale and semiquantitative parameters obtained by OPES evaluation. Despite reliable and reproducible OPES results, allowing an adequate study also of the esophageal phase, nowadays scintigraphic study remains an underestimated method to be considered in the diagnosis of dysphagia and related complications.

Videofluoroscopic swallow study training for radiologists-in-training: a survey of practice and training needs

BACKGROUND

There is a lack of formal, published videofluoroscopic swallow study (VFSS) training targeting radiologists, yet radiology senior medical officers and resident medical officers (i.e., radiologists-in-training, known in Australia as "registrars") are expected to be involved in VFSS interpretation of anatomical anomalies and reporting. This study investigated whether VFSS training is delivered to registrars during their specialist radiology training, whether it is a perceived need and, if so, to determine the desired content for inclusion in a targeted training package.

METHODS

A cross-sectional, mixed methods study design was used. An internet-based survey was circulated via convenience and snowball sampling to radiologists (both senior medical officers and registrars) and speech-language pathologists across Australia in October-November 2017. Surveys also were distributed to practitioners based in New Zealand and the United Kingdom, as they practised within similar health systems, and it was anticipated they may have similar VFSS training practices. The radiology survey contained 36 questions and the speech-language pathology survey contained 44 questions. Participants were asked the following: (1) Report their current VFSS radiology registrar training environment; (2) Advise whether radiology registrars need VFSS training; (3) Recommend the content, format, training intensity, and evaluation methods for an effective radiology registrar training package. Demographic data were analysed descriptively, and open-ended responses were analysed using qualitative content analysis.

RESULTS

21 radiology senior medical officers and registrars and 150 speech-language pathologists predominantly based at Australian tertiary hospital settings completed the survey. Most respondents (90.6%) identified that VFSS training is needed for radiology registrars. Only one speech-language pathologist respondent reported that they deliver VFSS training for radiology registrars. Specific content and teaching modalities for a VFSS training package, including diagnosing anatomical anomalies associated with dysphagia were recommended.

CONCLUSION

While most of the radiologists and speech-language pathologists surveyed did not deliver VFSS training to radiology registrars, they identified that targeted training is needed to improve radiology registrars' effectiveness and engagement in VFSS clinics. The training package content, format and evaluation methods recommended by participants will inform the development of a VFSS training package targeting radiology registrars to be piloted at an Australian tertiary hospital.

Automated pharyngeal phase detection and bolus localization in videofluoroscopic swallowing study: Killing two birds with one stone?

BACKGROUND AND OBJECTIVE

The videofluoroscopic swallowing study (VFSS) is a gold-standard imaging technique for assessing swallowing, but analysis and rating of VFSS recordings is time consuming and requires specialized training and expertise. Researchers have recently demonstrated that it is possible to automatically detect the pharyngeal phase of swallowing and to localize the bolus in VFSS recordings via computer vision approaches, fostering the development of novel techniques for automatic VFSS analysis. However, training of algorithms to perform these tasks requires large amounts of annotated data that are seldom available. In this paper, we demonstrate that the challenges of pharyngeal phase detection and bolus localization can be solved together using a single approach.

METHODS

We propose a deep-learning framework that jointly tackles pharyngeal phase detection and bolus localization in a weakly-supervised manner, requiring only the initial and final frames of the pharyngeal phase as ground truth annotations for the training. Our approach stems from the observation that bolus presence in the pharynx is the most prominent visual feature upon which to infer whether individual VFSS frames belong to the pharyngeal phase. We conducted extensive experiments with multiple convolutional neural networks (CNNs) on a dataset of 1245 bolus-level clips from 59 healthy subjects.

RESULTS

We demonstrated that the pharyngeal phase can be detected with an F1-score higher than 0.9. Moreover, by processing the class activation maps of the CNNs, we were able to localize the bolus with promising results, obtaining correlations with ground truth trajectories higher than 0.9, without any manual annotations of bolus location used for training purposes.

CONCLUSIONS

Once validated on a larger sample of participants with swallowing disorders, our framework will pave the way for the development of intelligent tools for VFSS analysis to support clinicians in swallowing assessment.

Comparison of methods for evaluation of upper esophageal sphincter (UES) relaxation duration: Videofluoroscopic swallow study versus high-resolution manometry

This study aims to compare the 2 methods of upper esophageal sphincter (UES) relaxation measurement and determine which method has better diagnostic value in UES relaxation impairment The study included 140 patients with pharyngeal dysphagia who underwent both videofluoroscopic swallow study (VFSS) and high-resolution manometry (HRM). Feeding method was determined to oral or non-oral feeding based on the severity of dysphagia; 103 patients were in oral feeding group and 37 were in non-oral feeding group. UES relaxation duration was measured using VFSS and HRM, respectively. Receiver-operating characteristic curve analysis was conducted to validate the UES relaxation duration in determination of feeding method. UES relaxation duration was more decreased in non-oral feeding group than in oral feeding group on both VFSS and HRM. Receiver-operating characteristic analysis revealed that the optimal cutoff value of UES relaxation duration to determine feeding method (oral or non-oral feeding) was 0.42 seconds on VFSS and 0.44 seconds on HRM. The sensitivity for feeding method was higher in VFSS than HRM (83.5% vs 70.9%), while the specificity was higher in HRM than VFSS (48.6% vs 54.1%). VFSS and HRM have complementary ability in evaluating UES relaxation duration in patients with oropharyngeal dysphagia.

Which Videofluoroscopy Parameters Are Susceptible to the Influence of Differences in Barium Product and Concentration?

PURPOSE

Prior studies suggest there may be differences in videofluoroscopic measures of swallowing across different barium concentrations. Whether different barium products of identical concentration result in similar swallowing physiology remains unknown. This is important, as barium intended for videofluoroscopy (i.e., Bracco Varibar) is not available globally. Our aim was to identify differences in healthy swallowing across five different barium stimuli.

METHOD

Twenty healthy adults (10 women), aged 22-54 years, underwent videofluoroscopy including comfortable sips of thin liquid barium: two sips of 20% weight-to-volume (w/v) barium prepared with E-Z-HD powder, and two sips each of 20%w/v and 40%w/v barium prepared with Liquid Polibar Plus and E-Z-Paque powder. Recordings were analyzed according to the Analysis of Swallowing Physiology: Events, Kinematics and Timing Method. Measures of timing, kinematics and residue were obtained. Chi-square, Friedman's, and Wilcoxon signed-ranks test were used to identify differences across stimuli.

RESULTS

Significant differences were seen across barium stimuli for upper esophageal sphincter (UES) opening duration, UES diameter, pharyngeal area at maximum constriction, and residue. In all cases, smaller values were seen with the 20%w/v E-Z-HD stimulus; however, this stimulus had questionable opacity for visualization. Patterns of residue severity were not explained by barium concentration.

CONCLUSIONS

This study confirms that some measures of swallowing are influenced by barium product and/or concentration. Measures are not necessarily similar across different barium products at the same concentration. This study illustrates the importance of using standard and appropriate stimuli in videofluoroscopy, and for clinicians to report not only the product but also the concentration of stimuli used.

SUPPLEMENTAL MATERIAL

https://doi.org/10.23641/asha.20669712.

Comparison of Validated Videofluoroscopic Outcomes of Pharyngeal Residue: Concordance Between a Perceptual, Ordinal, and Bolus-Based Rating Scale and a Normalized Pixel-Based Quantitative Outcome

PURPOSE

This study compared the concordance between two validated videofluoroscopic pharyngeal residue outcome scales used in clinical and research settings: the Dynamic Imaging Grade of Swallowing Toxicity (DIGEST) and the Analysis of Swallowing Physiology: Events, Kinematics and Timing (ASPEKT) percent residue metric.

METHOD

Two trained raters completed independent and blinded videofluoroscopic ratings of both DIGEST efficiency and ASPEKT percent pharyngeal residue outcomes for bolus trials of 5 cc Varibar thin liquid (n = 223), thin liquid comfortable cup sips (n = 223), and 5 cc Varibar thin honey (n = 223). Spearman's rho and Kruskal-Wallis analyses were performed for each bolus type.

RESULTS

Significant associations between DIGEST and ASPEKT pharyngeal residue outcomes were noted for 5 cc thin (r = .54, p < .001), cup sip thin (r = .41, p < .001), and 5 cc thin honey (r = .60, p < .001) bolus trials. ASPEKT percent residue increased across worsening DIGEST efficiency ordinal scale levels, with a main effect for each bolus type. Post hoc analysis revealed significant differences in the ASPEKT percent residue values between each DIGEST pairwise comparison for the thin cup sip bolus trial and for each pairwise comparison except between the moderate-to-severe (less than half vs. majority) ordinal levels for the 5 cc thin and 5 cc honey bolus trials, p < .05.

CONCLUSIONS

Perceptual, ordinal (DIGEST) and quantitative, pixel-based (ASPEKT) videofluoroscopic pharyngeal residue outcomes were associated in this data set of 669 bolus trials. Future research is warranted to confirm these results.

Swallowing study using water-soluble contrast agents may increase aspiration sensitivity and antedate oral feeding without respiratory and drug complications: A STROBE-compliant prospective, observational, case-control trial

Although the modified barium swallowing study (MBSS) is considered the gold standard for assessing aspiration risk, aspiration of lipid-soluble barium can cause chemical pneumonitis or impair radiologic interpretation of the lungs. Water-soluble contrast agents (WSCAs) may avoid these complications while maintaining sensitivity on aspiration. This prospective, observational, case-control cohort trial evaluated all patients >3 years old referred for swallowing study from September 2015 to November 2017. Repeat evaluations of individuals were excluded. High-risk patients were evaluated by WSCA (iohexol)-based swallowing study (WSS) and others by MBSS. The study included 829 evaluations of 762 patients. After excluding 74 evaluations, 365 WSSs and 390 MBSSs were performed. The most frequent underlying condition was brain lesion, followed by aspiration pneumonia. Aspiration occurred more frequently in WSS (147 patients: 40.3%) than in MBSS (36 patients: 9.2%) (P = .00). However, neither aspiration volume (6.72 cc [3.09-10.35] vs 5.53 cc [2.21-8.85]) nor radiographic alterations differed between the 2 groups (P > .05). Moreover, the swallowed (16.62 cc [8.45-24.79]) and aspirated amounts of iohexol were not correlated with radiologic changes or deterioration (P > .05). Switching to oral feeding following WSS was more frequent (164 patients: 44.9%), whereas aspiration pneumonia was not (P = .00). WSS did not prolong the interval to patient discharge (P = .06) or induce an allergic reaction or chemotoxicity over 1 week. The absence of aspiration-induced complications and adverse drug effects suggests that, compared with MBSS, WSS may increase aspiration sensitivity and early switching to oral feeding.

Analysis of Sex-related Differences in Patients with Dysphagia: Using a Videofluoroscopy

BACKGROUND

Dysphagia is a common symptom with diverse etiologies and refers to disorders of the process of swallowing food or fluids. Many studies have reported the anatomical and functional differences between men and women in swallowing in healthy patients; however, sex discrepancies in symptomatic patients have not often been studied.

OBJECTIVES

To compare the performance of men and women with dysphagia using videofluoroscopy.

METHODS

To compare the performance of men and women with dysphagia using videofluoroscopy.

RESULTS

A total of 203 patients met the inclusion criteria, 106 men (52%) and 97 women (48%). Men complained significantly more about choking on liquids (P = 0.002) and in swallowing pills (P = 0.004) compared to women. Men had more abnormalities in the pharyngeal phase (P = 0.015) and at the upper esophageal sphincter (P = 0.056). The prevalence of aspiration, penetration, and barium residue in the hypopharynx and in the vallecula were significantly greater in men as well.

CONCLUSIONS

In patients with dysphagia, women had fewer subjective symptoms and performed better than men in videofluoroscopy especially in the pharyngeal phase. These differences are probably due to different anatomical and functional swallowing characteristics. A better understanding of these discrepancies can be useful in offering tailored treatment in clinical practice.

Alterations in white matter microstructural properties after lingual strength exercise in patients with dysphagia

OBJECTIVES

Central nervous system effects of lingual strengthening exercise to treat dysphagia remain largely unknown. This pilot study measured changes in microstructural white matter to capture alterations in neural signal processing following lingual strengthening exercise.

METHODS

Diffusion-weighted images were acquired from seven participants with dysphagia of varying etiologies, before and after lingual strengthening exercise (20 reps, 3×/day, 3 days/week, 8 weeks), using a 10-min diffusion sequence (9 b0, 56 directions with b1000) on GE750 3T scanner. Tract-Based Spatial Statistics evaluated voxel-based group differences for fractional anisotropy, mean diffusivity, axial diffusivity, radial diffusivity and local diffusion homogeneity (LDH). Paired t-tests evaluated treatment differences on each metric (P < 0.05).

RESULTS

After lingual strengthening exercise, lingual pressure generation increased (avg increase = 46.1 hPa; nonsignificant P = 0.52) with these changes in imaging metrics: (1) decrease in fractional anisotropy, forceps minor; (2) increase in mean diffusivity, right inferior fronto-occipital fasciculus (IFOF); (3) decrease in mean diffusivity, left uncinate fasciculus; (4) decrease in axial diffusivity, both left IFOF and left uncinate fasciculus; (5) increase in LDH, right anterior thalamic radiation and (6) decrease in LDH, temporal portion of right superior longitudinal fasciculus. There was a positive correlation between diffusion tensor imaging metrics and change in lingual pressure generation in left IFOF and the temporal portion of right superior longitudinal fasciculus.

CONCLUSIONS

These findings suggest that lingual strengthening exercise can induce changes in white matter structural and functional properties in a small group of patients with dysphagia of heterogeneous etiologies. These procedures should be repeated with a larger group of patients to improve interpretation of overall lingual strengthening exercise effects on cortical structure and function.

Swallowing assessment in patients with dysphagia: Validity and reliability of a pocket-sized ultrasound system

BACKGROUND

The use of ultrasound as an adjunct to clinical swallowing evaluation provides quantitative physiological and morphological data. As a low-risk procedure, ultrasound imaging can be performed outside of a medical setting. This is particularly important for patients living in rural areas with restricted access to a hospital. Technical advances have produced pocket-sized ultrasound technology that is more affordable, and therefore within the fiscal reach of most allied health services.

AIMS

To explore the validity and reliability of pocket-sized ultrasound technology in dysphagia assessment.

METHODS & PROCEDURES

Data were acquired from 43 patients with dysphagia using the Clarius ultrasound device. Ultrasound and videofluoroscopic measures of hyoid and laryngeal displacement during liquid and puree swallowing were collected concurrently to quantify correlation and agreement between identical measures derived from the two instruments. Reliability of ultrasound was assessed for measures of hyoid and laryngeal displacement, tongue thickness, and size of the submental muscles in eight patients. Reliability was evaluated for the entire process of data acquisition including scanning and online measurement using an iPad in a clinical setting and for offline measurement on a computer screen to explore environmental influences on reliability.

OUTCOMES & RESULTS

Results revealed poor correlation between the measures of interest across instruments. Reliability of the entire process of data acquisition in a clinical setting was insufficient while reliability was more promising for offline measurements.

CONCLUSIONS & IMPLICATIONS

The clinical use of pocket-sized ultrasound devices, such as the Clarius system, for swallowing evaluation is not indicated at this time. Enhanced validity and reliability of the entire process of data acquisition are needed prior to clinical translation of such technology.

WHAT THIS PAPER ADDS

What is already known on the subject The use of ultrasound allows for radiation-free, non-invasive swallowing assessment. Some data suggest that ultrasound is valid and reliable in the evaluation of swallowing using standard-sized equipment. Insufficient validity and reliability have been reported for pocket-sized ultrasound technology in the assessment of healthy swallowing. What this paper adds to existing knowledge This research is the first to provide validity and reliability data of the pocket-sized Clarius technology in the evaluation of swallowing in patients with dysphagia. Insufficient validity and reliability of online data acquisition in a clinical environment were found. Reliability for offline measurement was more promising. What are the potential or actual clinical implications of this work? The clinical use of pocket-sized ultrasound devices, such as the Clarius system, for swallowing assessment is not indicated at this time.

Unilateral Left Frontal Lobe Lesion in a Marburg's Variant of Multiple Sclerosis Patient with Impaired Swallowing and Speech: A 3-Year Clinical/Brain MRI Follow-up

Although the importance of bilateral cortical innervation in the control of swallowing is well known, neurogenic dysphagia caused by unilateral hemispheric ischemic lesion has been also reported. Our patient is a 41-year-old male who developed difficulty swallowing liquids, oral apraxia, and motor dysphasia, followed by right-hand ataxia. Brain magnetic resonance imaging (MRI) showed subcortical tumefactive conglomerate of cystic lesions in the left frontal, precentral region, which were sharp edged, with perilesional edema, concordant with lesions in Marburg's variant of multiple sclerosis. Steroid treatment and plasma exchange therapy led to disappearance of neurological symptoms. Treatment with interferon β-1a 40 mcg sc was initiated. During a 3-year follow-up, clinical/brain MRI scan showed no new neurological manifestations, a significant regression of lesion size, and no new brain lesions. To the best of our knowledge, this is a first case of dysphagia caused by unilateral hemispheric lesion in a multiple sclerosis patient.

Implementation of a speech and language therapy-led referring model for videofluoroscopic swallow studies: An evaluation of service outcomes

BACKGROUND

Videofluoroscopic swallow studies (VFSS) are integral to diagnosing and supporting dysphagia management. However, in many countries, only doctors are authorized to complete medical imaging request forms, in accordance with radiation safety regulations. This can impact workflow and timely access to VFSS. Enhanced scope of practice (ESP) models of care exist, where speech and language therapists (SLTs) are authorized to complete VFSS request forms. However, formal evaluations of these ESP models are currently lacking.

AIMS

The primary aim of this study was to examine service outcomes regarding the safety and efficiency of SLTs completing VFSS request forms compared with the medical referring model (standard care). The secondary aim was to ascertain the impacts on SLTs' daily workflow and the utility of training for SLTs to complete VFSS requests.

METHODS & PROCEDURES

The study involved a mixed-method design. First, referrals completed using standard care versus those completed under the new SLT-led VFSS referring model were compared for efficiency (days to request completion, number of contacts between staff to complete requests and delay to VFSS appointments) and safety (compliance with radiation safety standards for requests, adverse events and change to dysphagia management to justify radiation exposure). Semi-structured interviews were then conducted with SLT referrers (n = 7) exploring the impacts of the model on daily workflow and the utility of training.

OUTCOMES & RESULTS

VFSS inpatient requests were examined across a 3-month period (n = 61 requests) using the standard model, and for 6 months (n = 109 requests) following the introduction of SLT-led VFSS referring. Regarding efficiency, there was no significant difference between the two models, with most request forms taking less than or equal to 1 day to be completed. Adherence to radiation safety requirements was significantly greater in the SLT-led VFSS referring model compared with the standard model (p < 0.001) in relation to the overall requisite clinical information being documented on the request forms. No adverse events occurred and 100% of VFSSs led to changed dysphagia management. Interviews of VFSS referring SLTs revealed that completing requests was not complex or onerous, and that the training equipped them well to undertake the role.

CONCLUSIONS & IMPLICATIONS

The SLT-led VFSS referring model was feasible for SLTs and resulted in satisfactory efficiency and greater adherence to radiation safety requirements for VFSS request forms than the standard model. Improved information on VFSS request forms provides clearer justification for the radiation procedure and helps optimize the diagnostic yield of VFSS. The evidence supports further widespread adoption of this model.

WHAT THIS PAPER ADDS

What is already known on the subject Models of care permitting selected allied health professionals to refer patients for diagnostic radiology procedures have been established to achieve healthcare efficiencies. Evidence supports the safety and efficiency of physiotherapists referring to radiology. However, limited published outcome data exist regarding models of SLTs referring for radiology procedures, such as VFSS. What this paper adds to existing knowledge This study describes the implementation of a SLT-led VFSS inpatient referring model in a quaternary hospital and examines service outcomes. The findings reveal that VFSS request forms completed in the SLT-led referring model had greater adherence to radiation safety standards compared with the standard referring model. Efficiency was similar across both models and there were no adverse events. Completing VFSS requests did not disrupt daily workflow for SLTs and training was effective preparation for the role. What are the potential or actual clinical implications of this work? Results demonstrate that the SLT-led VFSS referral model can be safely and appropriately implemented in the inpatient setting. Improved quality of information documented on request forms by SLTs increases adherence with radiation safety standards, providing clearer justification for radiation assessments and potentially eliciting more targeted diagnostic information to inform dysphagia treatment planning. These findings may support other hospital services to establish this type of referring model.

[Ultrasound-guided electroacupuncture at suprahyoid muscle group for pharyngeal dysphagia after stroke: a randomized controlled trial]

OBJECTIVE

To compare the effect among ultrasound-guided electroacupuncture (EA) at suprahyoid muscle group, conventional acupuncture and conventional EA at suprahyoid muscle group on pharyngeal dysphagia after stroke, and to explore its biomechanical mechanism.

METHODS

A total of 120 patients with pharyngeal dysphagia after stroke were randomly divided into an observation group, a control-1 group and a control-2 group, 40 cases in each group. The patients in the observation group were treated with ultrasound-guided EA at suprahyoid muscle group; the patients in the control-1 group were treated with EA at Lianquan (CV 23), Wangu (GB 12) and Fengchi (GB 20), etc.; the patients in the control-2 group were treated with EA at suprahyoid muscle group according to anatomical location. The EA in the three groups were discontinuous wave, with frequency of 5 Hz and current intensity of 1 mA. The EA was given for 30 minutes, once a day, 6 times were taken as a course of treatment, and 4 courses of treatment were provided. The video floroscopic swallowing study (VFSS) was performed before and after treatment. The Rosenbek penetration-aspiration scale (PAS) score, the forward and upward movement distance of hyoid bone and thyroid cartilage, Ichiro Fujima ingestion-swallowing function score were recorded in the three groups, and the incidences of subcutaneous hematoma were recorded after treatment.

RESULTS

Compared before treatment, the PAS scores were reduced and the Ichiro Fujima ingestion-swallowing function scores were increased after treatment in the three groups (P<0.05); the PAS scores in the observation group were lower than those in the control-1 group and the control-2 group, and the Ichiro Fujima ingestion-swallowing function scores in the observation group were higher than those in the control-1 group and the control-2 group (P<0.05). After treatment, the forward and upward movement distance of hyoid bone and thyroid cartilage in the observation group and the control-2 group was increased (P<0.05), and the forward and upward movement distance of hyoid bone was increased in the control-1 group (P<0.05); the forward and upward movement distance of hyoid bone and thyroid cartilage in the observation group was longer than that in the control-1 group and the control-2 group (P<0.05). The incidence of subcutaneous hematoma in the observation group was 0% (0/40), which was lower than 20.0% (8/40) in the control-1 group and 47.5% (19/40) in the control-2 group (P<0.05).

CONCLUSION

Ultrasound-guided EA at suprahyoid muscle group could improve the swallowing function in patients with pharyngeal dysphagia after stroke by increasing the motion of hyoid laryngeal complex. Its effect and safety are better than conventional acupuncture and conventional EA at suprahyoid muscle group.

Conceptual Framework Behind the Development of a Level of Confidence Tool: The Pediatric Videofluoroscopic Swallow Study Value Scale

PURPOSE

The videofluoroscopic swallow study (VFSS) is the most commonly used instrumental procedure for evaluating swallowing in pediatric populations suspected of having dysphagia. Assessment and interpretation of a VFSS in pediatric populations is frequently challenged by testing-specific factors that can raise concerns regarding the representativeness of swallow events observed during testing compared to daily feeding/swallowing physiology. When VFSS findings do not represent typical swallowing patterns, treatment recommendations can result in suboptimal outcomes. To address this current challenge to pediatric VFSS interpretation and associated treatment recommendations, the pediatric VFSS Value Scale (pVFSS Value Scale) was developed within a tertiary regional pediatric medical center. This clinical focus article summarizes the initial scale development phases and resulting conceptual framework for rating clinical testing factors that influence a clinician's level of confidence regarding pediatric VFSS findings. Future goals for scientific evaluation and clinical utilization of this new rating scale are also reported.

CONCLUSIONS

The pVFSS Value Scale was developed to assist clinicians with interpretation of pediatric VFSS assessment outcomes and to efficiently communicate factors influencing impressions and treatment recommendations with team members and caregivers. This clinical concept article summarizes potential uses of this tool to inform treatment planning as well as future clinical research to evaluate its psychometrics and clinical utility.

Reliability of the Penetration-Aspiration Scale and Temporal and Clearance Measures in Poststroke Dysphagia: Videofluoroscopic Analysis From the Swallowing Treatment using Electrical Pharyngeal Stimulation Trial

PURPOSE

Information on reliability of outcome measures used to assess the effectiveness of interventions in dysphagia rehabilitation is lacking, particularly when used by different research groups. Here, we report on reliability of the penetration-aspiration scale (PAS) and temporal and clearance measures, determined using videofluoroscopy.

METHOD

Secondary analysis used videofluoroscopies from the Swallowing Treatment using Electrical Pharyngeal Stimulation trial in subacute stroke. PAS scores (719 scores from 18 participants) were evaluated and compared to the original PAS scores from the trial. Five conditions were assessed, including reliability for every swallow and overall mean of the worst PAS score. Operational rules for assessing temporal and clearance measures were also developed using the same data, and reliability of these rules was assessed. Reliability of component-level and derivative-level scores was assessed using the intraclass correlation coefficient (ICC) and weighted kappa.

RESULTS

Image quality was variable. Interrater reliability for the overall mean of the worst PAS score was excellent (ICC = .914, 95% confidence interval [CI] [.853, .951]) but moderate for every swallow in the bolus (ICC = .743, 95% CI [.708, .775]). Intrarater reliability for PAS was excellent (all conditions). Excellent reliability (both inter- and intrarater > .90) was seen for temporal measures of stage transition duration (ICC = .998, 95% CI [.993, .999] and ICC = .995, 95% CI [.987, .998], respectively) as well as initiation of laryngeal closure and pharyngeal transit time and all individual swallow events. Strong scores were obtained for some clearance measures; others were moderate or weak.

CONCLUSIONS

Interrater reliability for PAS is acceptable but depends on how the PAS scores are handled in the analysis. Interrater reliability for most temporal measures was high, although some measures required additional training. No clearance measures had excellent reliability.

SUPPLEMENTAL MATERIAL

https://doi.org/10.23641/asha.19090088.

Enhanced rapid review of the applicability of ultrasound in the assessment of sucking, swallowing and laryngeal function in the paediatric population

BACKGROUND

The coronavirus disease 2019 (COVID-19) pandemic has renewed interest in the use of ultrasound (US) amongst dysphagia-trained clinicians working with infants and children. US is a portable, minimally intrusive tool which carries reduced risk of aerosol-generation provoked by other instrumental swallowing assessment tools such as fibreoptic endoscopic evaluation of swallowing (FEES). For this reason, US could be a valuable addition to the dysphagia assessment toolkit. A recently published rapid review of US evidence for the assessment of swallowing and laryngeal function in the adult population provided a framework for this neonatal and paediatric review.

AIMS

This enhanced rapid review aimed to establish the applicability of US as an instrumental assessment tool for sucking, swallowing and laryngeal function in the neonatal and paediatric populations.

METHODS & PROCEDURES

A rapid review of six electronic databases was conducted to identify articles using US to assess sucking, swallowing or laryngeal function in the selected populations, compared with varied reference tests. Abstract screening was completed according to pre-defined inclusion/exclusion criteria with 10% of articles assessed by a second screener. Data was extracted from the included studies using a pre-developed form. A modified QUADAS-2 tool was used to assess study quality. Results from the included studies were summarised and grouped into sucking, swallowing and laryngeal function data.

OUTCOMES & RESULTS

Twelve studies using US in the assessment of swallowing and/or laryngeal function met inclusion criteria. No studies using US for assessment of sucking met the inclusion criteria. All were peer-reviewed, primary studies across a range of clinical populations and with a wide geographical spread. Five studies had an overall low risk of bias. Seven studies had at least one domain where risk of bias was judged as high. All studies had high applicability. The two studies assessing swallowing differed in terms of aims and use of US. The studies assessing laryngeal function predominately investigated vocal fold movement and laryngeal pathology. Sensitivity and specificity data were provided or calculated from raw data for nine of the laryngeal function studies (respective ranges of 75%-100% and 80%-100%).

CONCLUSIONS & IMPLICATIONS

Emerging evidence exists to support the use of US as adjunct to clinical assessment of swallowing and laryngeal function in the neonatal and paediatric population. A paucity of evidence to support use of US in the assessment of sucking exists. Further research is needed to establish evidence-based assessment and analysis protocols as well as development of paediatric data.

Determining the Relationship Between Hyoid Bone Kinematics and Airway Protection in Swallowing

PURPOSE

Research remains equivocal regarding the links between hyoid movement and penetration-aspiration. The aims of this study were (a) to explore associations between hyoid parameters, laryngeal vestibule closure (LVC) parameters, and penetration-aspiration on thin liquids; and (b) to determine which of these parameters are the strongest predictors of penetration-aspiration.

METHOD

This study involved retrospective analysis of an existing videofluoroscopy data set, collected in 305 participants (152 males) with noncongenital/nonsurgical/non-oncological risk for dysphagia. We extracted data for six thin liquid swallows per participant, and obtained measures of hyoid movement (peak position, speed) and LVC (complete/incomplete, timing, duration). Resulting values were coded as typical/atypical relative to healthy reference data. Relationships were explored using chi-square tests and odds ratios (a) for the entire data set and (b) for the subset of data with complete LVC. Hierarchical logistic regression models determined the strongest predictors of penetration-aspiration.

RESULTS

Significant associations were found between penetration-aspiration and incomplete LVC, prolonged time-to-most-complete-LVC, short LVC duration, reduced anterior hyoid peak position, and reduced hyoid speed. Hyoid measures were also significantly associated with LVC parameters. In the first regression model, incomplete LVC and prolonged time-to-most-complete-LVC were the only significant predictors of penetration-aspiration. For cases with complete LVC, the only significant predictor was prolonged time-to-most-complete-LVC.

CONCLUSIONS

Although reduced anterior hyoid peak position and speed are associated with penetration-aspiration on thin liquids, these measures do not independently account for penetration-aspiration when considered in conjunction with measures of LVC. When identifying mechanisms explaining penetration-aspiration, clinicians should focus on LVC (complete/incomplete) and timeliness of LVC.

Predictive value of the videofluoroscopic swallowing study for long-term mortality in patients with subacute stroke

To investigate the usefulness of the videofluoroscopic swallowing study (VFSS) for subacute stroke in predicting long-term all-cause mortality, including not only simple parameters obtained from VFSS results, but also recommended dietary type as an integrated parameter.This was a retrospective study of patients with subacute (<1 month) stroke at a university hospital between February 2014 and September 2019. The independent risk factors were investigated using stepwise Cox regression analysis, which increased the all-cause mortality of patients with stroke among VFSS parameters.A total of 242 patients with subacute stroke were enrolled. The significant mortality-associated factors were age, history of cancer, recommended dietary type (modified dysphagia diet; adjusted hazard ratio [HR], 6.971; P = .014; tube diet, adjusted HR: 10.169; P = .019), and Modified Barthel Index. In the subgroup survival analysis of the modified dysphagia diet group (n = 173), the parameters for fluid penetration (adjusted HR: 1.911; 95% confidence interval, 1.086-3.363; P = .025) and fluid aspiration (adjusted HR: 2.236; 95% confidence interval, 1.274-3.927; P = .005) were significantly associated with mortality.The recommended dietary type determined after VFSS in subacute stroke was a significant risk factor for all-cause mortality as an integrated parameter for dysphagia. Among the VFSS parameters, fluid penetration and aspiration were important risk factors for all-cause mortality in patients with moderate dysphagia after stroke. Therefore, it is important to classify the degree of dysphagia by performing the VFSS test in the subacute period of stroke and to determine the appropriate diet and rehabilitation intervention for mortality-related prognosis.

Increased cortical-medulla functional connectivity is correlated with swallowing in dysphagia patients with subacute infratentorial stroke

•

Patients with infratentorial stroke showed increased cortex-medulla connectivity.

•

The cortex-medulla functional connectivities were related to swallowing function.

•

The identified regions may be candidates for non-invasive strategies for dysphagia.

•

FC mapping using the medulla as a seed is useful in swallowing network research.

Patients with infratentorial stroke (IS) exhibit more severe dysphagia and a higher risk of aspiration than patients with supratentorial stroke. Nevertheless, a large proportion of patients with IS regain swallowing function within 6 months; however, the neural mechanism for this recovery remains unclear. We aimed to investigate possible neuroplastic changes involved using functional magnetic resonance imaging (fMRI) and their relation to swallowing function. We assessed 21 patients with IS (mean age: 59.9 ± 11.1 years) exhibiting dysphagia in the subacute phase and 21 healthy controls (mean age: 57.1 ± 7.8 years). Patient evaluations were based on the functional oral intake scale (FOIS), videofluoroscopic swallow study (VFSS), and fMRI. Temporal swallowing measures and the penetration-aspiration scale (PAS) were obtained using VFSS. Whole-brain–medulla resting-state functional connectivity (rsFC) was calculated and compared between patients and healthy controls. The rsFCs were also correlated with functional measures within the patient group. In patients with IS, whole-brain–medulla rsFCs were significantly higher in the precuneus, the left and right precentral gyrus, and the right supplementary motor area compared to those in healthy controls (P < 0.001, family-wise error-corrected cluster-level P < 0.05). The rsFCs to the medulla for the left (r = −0.507, P = 0.027) and right side (r = −0.503, P = 0.028) precentral gyrus were negatively correlated with the PAS. The rsFC between the left (r = 0.470, P = 0.042) and right (r = 0.459, P = 0.048) precentral gyrus to the medulla was positively correlated with upper esophageal sphincter opening durations (UOD). In addition, PAS was also correlated with UOD (r = −0.638, P = 0.003) whereas the laryngeal closure duration was correlated with the hyoid bone movement duration (r = 0.550, P = 0.015). Patients with IS exhibited overall modulation of cortical-medulla connectivity during the subacute phase. Patients with higher connectivities showed better swallowing performance. These findings support that there is cortical involvement in swallowing regulation after IS and can aid in determining potential treatment targets for dysphagia.

Neural correlates in the development of and recovery from dysphagia after supratentorial stroke: A prospective tractography study

•

Stroke may lead to unilateral or bilateral CBT changes regardless of dysphagia.

•

Poor fractional anisotropy of the unaffected sides relates to limited recovery.

•

Swallowing recovery may depend on the integrity of the unaffected CBT.

•

Bi-hemispheric reorganization of the CBT is associated with swallowing recovery.

Background

Methods

Results

Conclusions

Oropharyngoesophageal Scintigraphy in a Case of Complex Swallowing Disorders After a Major Oral Surgery

ABSTRACT

A 75-year-old woman had an occasional finding of a left tonsil mass for dysphagia, which resulted a high-grade squamous carcinoma. Therefore, the patient was sent to have a left pharyngectomy. After the pharyngectomy, the patient reported persistent swallowing disorders and nasal reflux. Consequently, she had an oropharyngoesophageal scintigraphy, demonstrating irregular oral and pharyngeal swallowing phases and confirming reflux episodes into the rhinopharynx and into the oropharynx. In line with these findings, the patient was send to rehabilitation; the abnormal functional mechanisms, previously identified by the scintigraphy, allowed to guide the speech therapy, with a progressive clinical improvement.

Instrumental Swallowing Assessments in the Neonatal and Pediatric Populations: A Systematic Review

The scientific scope of swallowing disorders in the neonatal and pediatric populations is growing exponentially; however, the preponderance of evidence for evaluation protocols has been concentrated in non-instrumental evaluations creating a lack of research about protocols for instrumental swallowing assessment. Thus, the purpose of this study was to systematically review the literature to identify and to report protocols used in instrumental assessments through videofluoroscopic swallow study (VFSS) and fiberoptic endoscopic evaluation of swallowing (FEES) in the neonatal and pediatric populations to support clinical decision making. The search strategy was applied in five online databases, no filters were applied to restrict languages or publication dates and the gray literature was reviewed. PRISMA statement was used to guide the construction of this review. The studies included validated and unvalidated protocols, the validated protocols had their risk of bias estimated using the QUADAS-2. In total, 13 studies were included in the final review, of these eleven assessed through QUADAS-2, and two classified with low risk of bias. One study is in the process of standardization and validation of an instrumental assessment protocol for swallowing in bottle-fed infants through VFSS. Information about validity and reliability of published protocols for instrumental evaluation in the neonatal and pediatric populations is limited. Therefore, further research is needs to development studies aiming to standardize and validate protocols for instrumental assessments in these populations.