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AbstractPurposeMethodResultConclusionPharyngeal residue rating scales are often used to rate pharyngeal residue observed during flexible endoscopic evaluation of swallowing. Despite the widespread use of pharyngeal residue rating scales, there is no data that has systematically explored user experience. The aim of this scoping review was to investigate specific reporting of user experience, user centred design principles, and normative data in the development of pharyngeal residue rating scales.A scoping review was conducted across four electronic databases inclusive of all dates until June 2024. Grey literature searching occurred in March–April 2023 and was repeated in June 2024. This review followed the Preferred Reporting Items for Systematic Review and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR) protocol. Titles/abstracts, full texts, and data extraction were reviewed by two independent reviewers.A total of 22 sources were included, with 18 unique pharyngeal residue rating scales identified. Two studies referred to user experience, seven included at least one user centred design principle, and four studies reported on normative data.The findings of this review highlight few pharyngeal residue rating scales include the experience of the intended user and establish normative data in the initial development phase. User experience, user centred design principles, and normative data may be useful considerations to optimise functionality. [ABSTRACT FROM AUTHOR]

Texture modification in the form of gels or jellies is used for patients with dysphagia. For over 20 years, our group has been using gelatin jellies, a type of gel, as a starting diet for patients with dysphagia. Gelatin jellies are served in a small-sliced form and swallowed whole. In sliced jelly whole swallowing (SJWS), sliced gelatin jelly (SGJ) passes through the pharynx in one lump without collapsing. This study aimed to examine the usefulness of SJWS. We analyzed the images of videofluoroscopic swallowing studies performed using the normalized residue ratio scale (NRRSv: vallecula, NRRSp: pyriform sinus), the penetration–aspiration scale (PAS), and pharyngeal transit time (PTT) in 50 patients with dysphagia and compared the results in a prospective study. SJWS had significantly less residue in both NRRSv and NRRSp than in moderately thickened liquid swallowing. No significant differences in PAS scores were found between SGJ and moderately thickened liquid. Additionally, no significant differences in PTT scores were noted between the two. This study demonstrated the usefulness of SJWS in improving swallowing safety in patients with dysphagia. Further studies are needed to evaluate the reproducibility of the test, the comparison of SGJ with other thickened liquids, and the safety of SJWS for different diseases. [ABSTRACT FROM AUTHOR]

Hyoid bone excursion (HBE) is one of the most critical events in the pharyngeal phase of swallowing. Most previous studies focused on the total displacement and average velocity of HBE. However, HBE during swallowing is not one-dimensional, and the change of velocity and acceleration is not linear. This study aims to elucidate the relationship between the instantaneous kinematics parameters of HBE and the severity of penetration/aspiration and pharyngeal residue in patients with stroke. A total of 132 sets of video-fluoroscopic swallowing study images collected from 72 dysphagic stroke patients were analyzed. The maximal instantaneous velocity, acceleration, displacement, and the time required to reach these values in the horizontal and vertical axes were measured. Patients were grouped according to the severity of the Penetration-Aspiration Scale and the Modified Barium Swallow Impairment Profile- Pharyngeal Residue. The outcome was then stratified according to the consistencies of swallowing materials. Stroke patients with aspiration were associated with a lower maximal horizontal instantaneous velocity and acceleration of HBE, a shorter horizontal displacement, and prolonged time to maximal vertical instantaneous velocity compared to the non-aspirators. In patients with pharyngeal residue, the maximal horizontal displacement of HBE was decreased. After stratification according to bolus consistencies, the temporal parameters of HBE were more significantly associated with aspiration severity when swallowing thin bolus. Meanwhile spatial parameters such as displacement had a bigger influence on aspiration severity when swallowing viscous bolus. These novel kinematic parameters of HBE could provide important reference for estimating swallowing function and outcomes in dysphagic stroke patients. [ABSTRACT FROM AUTHOR]

Dysphagia diets are recommended to prevent choking and aspiration in people with dysphagia; however, rice-porridge and mashed rice-porridge, which are used as staple foods for people with dysphagia in Japan, are time-consuming to prepare. The National Agriculture and Food Research Organization has found jelly-like food products made from high-amylose rice-flour (rice-flour jelly) to be easy to prepare with a texture suitable for dysphagia diets. To investigate the potential of rice-flour jelly for the dysphagia diet, we evaluated the amount of pharyngeal residue after swallowing rice-flour jelly using fiberoptic endoscopic evaluation of swallowing and compared it with those of rice-porridge, mashed rice-porridge, and fruit jelly. We enrolled 70 participants (43 males and 27 females, aged 32–96 years, median 74.5 years) and evaluated their pharyngeal residue using the Yale Pharyngeal Residue Severity Rating Scale which includes five levels from I (none) to V (severe). Statistical analysis showed that level I was more common in fruit jelly for vallecula residue and pyriform sinus residue, and level III (mild) was more common in rice-porridge for vallecula residue (p < 0.05). No differences of pharyngeal residue were found in rice-flour jelly or mashed rice-porridge. No significant difference was observed in the number of participants with laryngeal penetration or aspiration. Therefore, rice-flour jelly is a suitable alternative to rice-porridge as a staple food for people with dysphagia in terms of food texture. [ABSTRACT FROM AUTHOR]

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. [ABSTRACT FROM AUTHOR]

Pediatric eating assessment tool (Pedi-EAT-10Arabic) is a validated and reliable caregiver administered outcome instrument designed for detection of children at high risk of penetration/aspiration. The objective of this study is to translate and validate the Arabic version of Pedi-EAT-10 and to correlate its results with pharyngeal residue and aspiration on fiber optic endoscopic examination of swallowing (FEES). A cross-sectional study including 202 children selected randomly from those attending the swallowing clinic in phoniatrics unit, Otorhinolaryngology department (ORL) at main university hospital between February 2019 and October 2020 complaining of dysphagia. For test–retest reliability, one hundred caregivers refilled the Pedi-EAT-10Arabic after a 2-week period following their first visit. Validity was established by comparing the scores of dysphagia patients to healthy controls. Internal consistency of Pedi-EAT-10Arabic was high (Cronbach's alpha 0.986). Intra class correlation showed excellent test–retest reliability (r = 0.968). The median Pedi-EAT 10Arabic score was significantly higher in dysphagia group compared to healthy controls. (Median 27 IQR 21–34 for cases compared to median zero IQR 0–2 points for healthy controls, P less than 0.001). A strong correlation was found between Pedi-EAT 10Arabic scores and PAS scores with Spearman's correlation coefficient r = 0.803 and P < 0.001. The ROC for evaluating the discriminatory capacity of Pedi-EAT 10 for aspiration showed an AUC of 0.92 (95% CI of 0.89 to 0.96). Conclusion: Pedi-EAT 10Arabic was found to be a valid and reliable screening tool for further instrumental assessment of risk of dysphagia in pediatric population. [ABSTRACT FROM AUTHOR]

This study aimed to assess the validity and reliability of the Turkish translation of the Yale pharyngeal residue severity rating scale. The scale measures the severity of residue in the vallecula and pyriform sinus. The original scale was translated into Turkish by two bilingual English-Turkish translators, and the Turkish version was translated back into English by two qualified professional translators to assess accuracy. The evaluators were divided into two groups (training and no-training) and two subgroups according to their experience. Intra-rater, inter-rater, and intra-class correlation coefficient measurements were analyzed by calculating agreement rates, kappa, and p values. In the analysis of the reliability, intra-class correlation coefficient values in the overall ratings for both the vallecula and the pyriform sinus were 0.9996 (95% CI 0.9992–0.9998) and 0.9997 (95% CI 0.9995–0.9999), respectively (p < 0.01). High agreement (> 95%) and perfect Fleiss kappa values were obtained for the vallecula and pyriform sinus ratings in the inter-rater initial assessments (κ = 0.959 and κ = 0.967, respectively). Perfect kappa values were found in the intra-rater results for both the vallecula and pyriform sinus (α = 0.9959 and κ = 0.9959, respectively). In the inter-rater secondary analysis, the vallecula and pyriform sinus kappa values were perfect (κ = 0.959 and κ = 0.967, respectively). In the intra-rater analysis, perfect kappa values were obtained for the vallecula and pyriform sinus in the no-training group and less-experience subgroup (κ = 0.9918 and κ = 1.0 for the vallecula, and κ = 1.0 and κ = 0.9902 for the pyriform sinus, respectively) In the inter-rater analysis, perfect kappa values were obtained for the vallecula and pyriform sinus in the no-training group and less-experience subgroup (κ = 0.9507 and κ = 0.9606 for the vallecula, and κ = 0.9836 and κ = 1.0 for the pyriform sinus, respectively). The Turkish translation of the Yale pharyngeal residue severity rating scale demonstrated high validity and reliability scores in determining pharyngeal residue location and value in the fiberoptic endoscopic evaluation of swallowing. [ABSTRACT FROM AUTHOR]

Aim: Dentures play an important role in improving masticatory and oropharyngeal swallowing functions in some edentulous patients without dysphagia. However, few studies have been conducted on patients with dysphagia. This study investigated the effect of dentures on pharyngeal swallowing function in patients with dysphagia. Methods: Older inpatients with dysphagia who used well‐fitting dentures were included in the study. Videofluoroscopic swallowing study findings with and without dentures were compared. Pharyngeal residue and area as spatial, the distance between the maxilla and mandible, hyoid bone/laryngeal displacement, and upper esophageal sphincter opening as kinematics, oral/pharyngeal transit time as temporal measurements, and patient‐reported symptoms were evaluated. The primary outcome was the pharyngeal residue measured using the normalized residue ratio scale. Comparisons were made using the paired t‐test, Wilcoxon signed‐rank test and Fisher's exact test. Results: The mean age of the 27 participants was 86.1 ± 6.8 years. The vallecular residue was more in those without dentures (with dentures: 0.01 [0–0.02], without dentures: 0.03 [0–0.08]; P = 0.003). The pyriform sinus residue showed no significant difference. Denture removal significantly increased the pharyngeal area. The distance between the maxilla and mandible decreased in the absence of dentures, and other kinematic measurements showed no significant differences. Oral/pharyngeal transit time was prolonged without dentures. Conclusions: Morphological changes caused by the removal of dentures led to pharyngeal expansion, which may result in increased vallecular residue. A treatment plan that considers the effect of dentures on pharyngeal swallowing function may provide rehabilitation that is more effective. Geriatr Gerontol Int 2021; 21: 907–912. [ABSTRACT FROM AUTHOR]

Background: Nasopharyngeal carcinoma (NPC) ranks first for head and neck malignancies, and radiotherapy is a recommended treatment. Most post-radiotherapy NPC patients experience oropharyngeal dysphagia that results in pharyngeal residue. Pharyngeal residue is thought to be a risk factor for aspiration-penetration. Objective: Examining the correlation between pharyngeal residue and penetration-aspiration in post-radiotherapy NPC patients. Method: Participants have been identified since 2018 to find out the total number of NPC patients. In the period January-October 2019, identifcation of NPC patients was performed according to participant criteria. Participants were examined for fberoptic endoscopic evaluation of swallowing (FEES), pharyngeal residue using the Yale Pharyngeal Residue Severity Rating Scale (YPR-SRS), and penetration-aspiration using Penetration-Aspiration Scale (PAS). Statistical tests were used Spearman correlation test with p<0.05. Results: The highest participant's pharyngeal residue appeared in vallecula when given soft bolus (96.55%), and in pyriform sinus when given thick liquid bolus (72.41%). Most participants with soft bolus had the highest negative penetration (72.59%) and positive penetration in thick liquid bolus (51.72%), while most had negative aspirations with the lowest value (89.66%). There is aspiration in 10.34% of patients when given a dilute liquid. There was a significant correlation between pharyngeal residue in vallecula and pyriform sinus with penetration-aspiration (p<0.05). There was a positive association with the use of soft bolus (r=0.623), thick liquid bolus (r=0.631), and dilute liquid bolus (r=0.891). Conclusions: There is a significant association between pharyngeal residue and penetration-aspiration in post-radiotherapy NPC patients. [ABSTRACT FROM AUTHOR]

Considering that measurement is a critical part of diagnostic technique for evaluating swallowing dysfunction, there is a need for a better foundational understanding of what influences residue measurement on flexible endoscopic evaluation of swallowing (FEES). This study investigated two factors and their potential influence on trends in residue ratings on FEES: (1) bolus consistency, and (2) residue severity levels on two different types of rating scales. Thirty-three clinicians were asked to rate their overall impressions of pharyngeal residue on 75 FEES videos representing a wide range of residue severities for thin liquid, applesauce, and cracker boluses. Ratings were made on both a visual analog scale (VAS) and a five-point ordinal scale in a randomized fashion across two sessions about two weeks apart. Statistical correlations were determined to assess the association between residue ratings and severity levels and bolus consistency. A total of 2475 VAS ratings and 2473 ordinal ratings were collected. Residue ratings were statistically different depending on severity level (p < 0.0001) and bolus consistency (p < 0.004). Raters appeared to avoid rating at the severe end of the scales, especially on visual analog scales. This study documented the relationship between clinician ratings of pharyngeal residue on FEES and various factors like severity and bolus type. Other findings, such as differences in ratings depending on the type of rating scale and halo effects on the VAS, are valuable for future scale development for understanding perceptual ratings of residue on FEES. [ABSTRACT FROM AUTHOR]

Background: Pharyngeal residue can trigger aspiration and choking after swallowing. Various studies to assess the amount of pharyngeal residue have been conducted; however, an easy and quantitative method is yet to be established. The aroma released from the pharyngeal residue is thought to be delivered from the pharynx to the nasal cavity via velopharynx by expiration, that is, retronasal pathway. Objective: This study verified that the amount of pharyngeal residue could be estimated by aroma intensity. Methods: Ten healthy adult subjects had tubes in from the oral cavity to the pharynx. Varying amounts of essence were dispensed into the pharynx through the tube either at rest or after swallowing the essence. Pharyngeal residue was simulated by retention essence in the pharynx without swallowing. An odour sensor was placed in the nostril, and the aroma intensity of the retained essence was measured over time. Results: The aroma intensity level flattened after a certain period of time had elapsed, and a significant correlation was found between the amount of essence dispensed and the flattened aroma intensity, both at rest and after swallowing. Furthermore, to estimate in a short period of time, changes in aroma intensity over time were estimated by fitting to a decay curve. The estimated intensity at convergence, calculated from the fitted curve from 80 to 120 seconds after swallowing, was significantly correlated to the measured intensity. Conclusion: The amount of pharyngeal residue can be estimated in a short period of time by measuring the aroma intensity. [ABSTRACT FROM AUTHOR]

Common practices to improve the ability to swallow include modifying physical properties of foods and changing the posture of patients. Here, we quantified the effects of the viscosity of a liquid bolus and patient posture on the bolus pathway and pharyngeal residue using a computational fluid dynamics simulation. We developed a computational model of an impaired pharyngeal motion with a low pharyngeal pressure and no pharyngeal adaptation. We varied viscosities from 0.002 to 1 Pa·s and postures from 15° to 30° (from nearly vertical to forward leaning). In the absence of pharyngeal adaptation, a honey-like liquid bolus caused pharyngeal residue, particularly in the case of forward-leaning postures. Although the bolus speed was different among viscosities, the final pathway was only slightly different. The shape, location, and tilting of the epiglottis effectively invited a bolus to two lateral pathways, suggesting a high robustness of the swallowing process. [ABSTRACT FROM AUTHOR]

Reduced laryngeal sensation and accumulated pharyngeal secretions are known predictors of aspiration. Yet, their association with residue has not been fully explored. One Hundred and ten fiberoptic endoscopic examination of swallowing (FEES) examinations were retrospectively analyzed. Murray's secretion scale (MSS) for secretion stasis and laryngeal sensation were tested for association with residue severity (Yale pharyngeal residue severity rating scale, YPR-SRS) and the number of swallows required to clear the bolus. The bolus challenges of each consistency (liquid, purée and solid) with the highest PAS and YPR-SRS scores were analyzed. Impaired laryngeal sensation (ILS) and MSS were both independently significantly associated with higher YPR-SRS for all consistencies examined. Mean YPR-SRS for patients with both ILS and secretion stasis was respectively 2.4 ± 1.1, 2.5 ± 1.2, 2.4 ± 1.2 for liquid, purée and solids in the vallecula, and 2.9 ± 1.3, 2.3 ± 1.1, 2 ± 1 for pyriform sinuses residue compared to 1.8 ± 0.7, 1.6 ± 1, 1.6 ± 1 for vallecular residue and 1.8 ± 0.8, 1.4 ± 0.8, 1.3 ± 0.7 for pyriform sinus residue of patients with normal laryngeal sensation and no stasis (p < 0.05 for all except liquids in vallecula). The combined findings of both ILS and MSS ≥ 1 had a sensitivity of 25.9%, specificity of 94.2%, positive predictive value (PPV) of 83.3% and negative predictive value (NPV) of 53.3% for prediction of pharyngeal residue and a sensitivity of 58.3%, specificity of 88.8%, PPV of 39.9% and a NPV of 94.6% for prediction of aspiration. Both ILS and MSS were significantly associated with increased number of swallows required to clear a bolus. Abnormal laryngeal sensation and secretion stasis are associated with pharyngeal residue severity and reduced residue clearing on FEES. [ABSTRACT FROM AUTHOR]

The aim of this study was to validate the German Version of the Yale Pharyngeal Residue Severity Rating Scale and to investigate the impact of rater experience and training. The English original scale was translated into German language using a forward-backward method. For the validation, 30 images of different pharyngeal residue amounts have been selected and assigned to the scales' severity levels by two experts. 28 raters rated the images in randomized order in two passes. To investigate the impact of experience and training, raters were grouped into subgroups. Statistical analysis was carried out using kappa statistics. The results demonstrate excellent residue ratings for construct validity, inter-rater reliability and intra-rater reliability regarding overall group and all subgroups (Kappa > 0.90). No significant differences were found between groups by experience and inconstant differences were found between groups by training. The German version of the Yale Pharyngeal Residue Severity Rating Scale is a valid, reliable instrument for scoring location and severity of pharyngeal residue in the context of flexible endoscopic evaluations of swallowing. [ABSTRACT FROM AUTHOR]

The Eating Assessment Tool-10 (EAT-10) is a 10-item patient-reported outcome measure (PROM) for dysphagia patients. The objective of this study was to translate and validate the EAT-10Heb and to test for a correlation between its score and residue, penetration and aspiration on Fiberoptic Endoscopic Examination of Swallowing (FEES). 136 patients visiting two specialized dysphagia clinics and undergoing FEES between April 2015 and August 2017, filled the EAT-10Heb. 23 patients refilled the EAT-10Heb during a 2-week period following their first visit. FEES were scored for residue (1 point per consistency, maximum 3 points) and penetration and aspiration (1 point for penetration, 2 points for aspiration per consistency, maximum 6 points). 51 healthy volunteers also filled the EAT-10Heb. Internal consistency and test-retest reproducibility were examined for reliability testing. Validity was established by comparing EAT-10Heb scores of dysphagia patients to healthy controls. The EAT-10Heb score was then correlated with the FEES score. Internal consistency of the EAT-10Heb was high (Cronbach's alpha = 0.925) as was the test-retest reproducibility (Spearman's correlation coefficient = 0.82, p < 0.0001). The median EAT-10Heb score was significantly higher in the dysphagia group compared to healthy controls (13, IQR 7-22 points for dysphagia patients compared to 0, IQR 0-0 points for healthy controls, p < 0.0001). A weak correlation was found between the EAT-10Heb scores and the FEES score (Pearson's correlation coefficient = 0.376, p < 0.0001). While the EAT-10Heb was found to be a reliable and valid PROM, it only weakly correlates with the pathological findings on FEES examination. [ABSTRACT FROM AUTHOR]

The purpose of this study was to investigate the reliability of residue ratings on Fiberoptic Endoscopic Evaluation of Swallowing (FEES). We also examined rating differences based on experience to determine if years of experience influenced residue ratings. A group of 44 raters watched 81 FEES videos representing a wide range of residue severities for thin liquid, applesauce, and cracker boluses. Raters were untrained on the rating scales and simply rated their overall impression of residue amount on a visual analog scale (VAS) and a five-point ordinal scale in a randomized fashion across two sessions. Intra-class correlation coefficients, kappa coefficients, and ANOVAs were used to analyze agreement and differences in ratings. Residue ratings on both the VAS and ordinal scales had acceptable inter- and intra-rater reliability. Inter-rater agreement was acceptable (ICC > 0.7) for all comparisons. Intra-rater agreement was excellent on the VAS scale (rc = 0.9) and good on the ordinal scale (k = 0.78). There was no significant difference between expert ratings and other raters based on years of experience for cracker ratings (p = 0.2119) and applesauce ratings (p = 0.2899), but there was a significant difference between clinicians on thin liquid ratings (p = 0.0005). Without any specific training, raters demonstrated high reliability when rating the overall amount of residue on FEES. Years of experience with FEES did not influence residue ratings, suggesting that expert ratings of overall residue amount are not unique or specialized. Rating the overall amount of residue on FEES appears to be a simple visual-perceptual task for puree and cracker boluses. [ABSTRACT FROM AUTHOR]

The goal of this work was to better understand perceptual judgments of pharyngeal residue on flexible endoscopic evaluation of swallowing (FEES) and the influence of a visual analog scale (VAS) versus an ordinal scale on clinician ratings. The intent was to determine if perceptual judgments of residue were more accurately described by equal or unequal intervals. Thirty-three speech language pathologists rated pharyngeal residue from 75 FEES videos representing a wide range of residue severities for thin liquid, applesauce, and cracker boluses. Clinicians rated their impression of the overall residue amount in each video on a VAS and, in a different session, on a five-point ordinal scale. Residue ratings were made in two separate sessions separated by several weeks. Statistical correlations of the two rating methods were carried out and best-fit models were determined for each bolus type. A total of 2475 VAS ratings and 2473 ordinal ratings were collected. Residue ratings from both methods (VAS and ordinal) were strongly correlated for all bolus types. The best fit for the data was a quadratic model representing unequal intervals, which significantly improved the r 2 values for each bolus type (cracker r 2 = 0.98, applesauce r 2 = 0.99, thin liquid r 2 = 0.98, all p < 0.0001). Perceptual ratings of pharyngeal residue demonstrated a statistical relationship consistent with unequal intervals. The present findings support the use of a VAS to rate residue on FEES, allowing for greater precision as compared to traditional ordinal rating scales. Perceptual judgments of pharyngeal residue reflected unequal intervals, an important concept that should be considered in future rating scales. [ABSTRACT FROM AUTHOR]

Identification of pharyngeal residue severity located in the valleculae and pyriform sinuses has always been a primary goal during fiberoptic endoscopic evaluation of swallowing (FEES). Pharyngeal residue is a clinical sign of potential prandial aspiration making an accurate description of its severity an important but difficult challenge. A reliable, validated, and generalizable pharyngeal residue severity rating scale for FEES would be beneficial. A systematic review of the published English language literature since 1995 was conducted to determine the quality of existing pharyngeal residue severity rating scales based on FEES. Databases were searched using controlled vocabulary words and synonymous free text words for topics of interest (deglutition disorders, pharyngeal residue, endoscopy, videofluoroscopy, fiberoptic technology, aspiration, etc.) and outcomes of interest (scores, scales, grades, tests, FEES, etc.). Search strategies were adjusted for syntax appropriate for each database/platform. Data sources included MEDLINE (OvidSP 1946-April Week 3 2015), Embase (OvidSP 1974-2015 April 20), Scopus (Elsevier), and the unindexed material in PubMed (NLM/NIH) were searched for relevant articles. Supplementary efforts to identify studies included checking reference lists of articles retrieved. Scales were compared using qualitative properties (sample size, severity definitions, number of raters, and raters' experience and training) and psychometric analyses (randomization, intra- and inter-rater reliability, and construct validity). Seven articles describing pharyngeal residue severity rating scales met inclusion criteria. Six of seven scales had insufficient data to support their use as evidenced by methodological weaknesses with both qualitative properties and psychometric analyses. There is a need for qualitative and psychometrically reliable, validated, and generalizable pharyngeal residue severity rating scales that are anatomically specific, image-based, and easily learned by both novice and experienced clinicians. Only the Yale Pharyngeal Residue Severity Rating Scale, an anatomically defined and image-based tool, met all qualitative and psychometric criteria necessary for a valid, reliable, and generalizable vallecula and pyriform sinus severity rating scale based on FEES. [ABSTRACT FROM AUTHOR]

Objective: In the dysphagic patient, pharyngeal residues (PR) are associated with aspiration and poor quality of life. The assessment of PR using validated scales during flexible endoscopic evaluation of swallowing (FEES) is crucial for rehabilitation. This study aims to validate and test the reliability of the Italian version of the Yale Pharyngeal Residue Severity Rating Scale (IT-YPRSRS). The effects of training and experience in FEES on the scale were also determined., Methods: The original YPRSRS was translated into Italian according to standardised guidelines. Thirty FEES images were selected after consensus and proposed to 22 naive raters who were asked to assess the severity of PR in each image. Raters were divided into two subgroups by years of experience at FEES, and randomly by training. Construct validity, inter-rater, and intra-rater reliability were assessed by kappa statistics., Results: IT-YPRSRS showed substantial to almost perfect agreement (kappa > 0.75) in validity and reliability for both the overall sample (660 ratings), and valleculae/pyriform sinus sites (330 ratings each). No significant differences emerged between groups considering years of experience, and variable differences were observed by training., Conclusions: The IT-YPRSRS demonstrated excellent validity and reliability in identifying location and severity of PR., (Copyright © 2023 Società Italiana di Otorinolaringoiatria e Chirurgia Cervico-Facciale, Rome, Italy.)

The Yale Pharyngeal Residue Severity Rating Scale was developed, standardized, and validated to provide reliable, anatomically defined, and image-based assessment of post-swallow pharyngeal residue severity as observed during fiberoptic endoscopic evaluation of swallowing (FEES). It is a five-point ordinal rating scale based on residue location (vallecula and pyriform sinus) and amount (none, trace, mild, moderate, and severe). Two expert judges reviewed a total of 261 FEES evaluations and selected a no residue exemplar and three exemplars each of trace, mild, moderate, and severe vallecula and pyriform sinus residue. Hard-copy color images of the no residue, 12 vallecula, and 12 pyriform sinus exemplars were randomized by residue location for hierarchical categorization by 20 raters with a mean of 8.3 years of experience (range 2-27 years) performing and interpreting FEES. Severity ratings for all images were performed by the same 20 raters, 2 weeks apart, and with the order of image presentations randomized. Intra-rater test-retest reliability, inter-rater reliability, and construct validity were determined by pooled multi-category multi-rater kappa statistics. Residue ratings were excellent for intra-rater reliability for vallecula (kappa = 0.957 ± 0.014) and pyriform sinus (kappa = 0.854 ± 0.021); very good to excellent for inter-rater reliability for vallecula (kappa = 0.868 ± 0.011) and pyriform sinus (kappa = 0.751 ± 0.011); and excellent for validity for vallecula (kappa = 0.951 ± 0.014) and pyriform sinus (kappa = 0.908 ± 0.017). Clinical uses include accurate classification of vallecula and pyriform sinus residue severity patterns as none, trace, mild, moderate, or severe for diagnostic purposes, determination of functional therapeutic change, and precise dissemination of shared information. Scientific uses include tracking outcome measures, demonstrating efficacy of interventions to reduce pharyngeal residue, investigating morbidity and mortality in relation to pharyngeal residue severity, and improving training and accuracy of FEES interpretation by students and clinicians. The Yale Pharyngeal Residue Severity Rating Scale is a reliable, validated, anatomically defined, and image-based tool to determine residue location and severity based on FEES. [ABSTRACT FROM AUTHOR]

Introduction: In this study we aimed to demonstrate the distinctive features of dysphagia in patients with myotonic dystrophy type 1 (DM1) and Duchenne muscular dystrophy (DMD). Methods: Diet-type score (DTS) and maximum tongue pressure (MTP) were measured in 20 DM1 and 24 DMD patients; all patients were also examined by videofluoroscopy (VF). We used VF to measure the range of hyoid bone excursion (RHBE) during pharyngeal transit time and the area of pharyngeal residue (APR) after the first swallow. Results: RHBE and APR values for DM1 patients were significantly greater than those for DMD patients. DTS and MTP did not differ between patients. A significant correlation was observed between DTS, MTP, and RHBE in DMD patients, but not in DM1 patients. Conclusions: Our findings reveal the differences in the distinctive features of dysphagia in DM1 and DMD. Adjustments in the diet of DMD patients in accordance with swallowing ability could be useful. Muscle Nerve 46: 490-495, 2012 [ABSTRACT FROM AUTHOR]

Background: Oral support during feeding was clinically provided to patients with severe motor and intellectual disabilities (SMID) for the prevention of dysphasia. The present study investigated the advantages of oral support anatomically and functionally., Methods: A videofluoroscopic swallowing study was conducted on nine patients with SMID (age = 5-41 years; mean age = 15.0; four males, five females) and 24 healthy adults (age = 26-67 years; mean age = 44.3; 16 males, eight females). The movements of the hyoid bone and mandible during pharyngeal swallowing were tracked, and the pharyngeal residues were evaluated. The temporal and spatial features of the movements were compared between patients with and without oral support as well as healthy adults., Results: The mandible moved downward earlier and showed larger displacement in the patients with SMID. The patients also had insufficient anterior displacement of the hyoid, which was associated with the pharyngeal residue. This displacement was enhanced, and the pharyngeal residue decreased with oral support., Conclusions: Oral support to hold the mandible successfully improved hyoid excursion and reduced pharyngeal residue during swallowing, which is a simple and reliable strategy for the prevention of dysphasia in patients with SMID., (© 2021 Japan Pediatric Society.)

Tablet size and head posture have been reported to affect swallowing of medications, but no previous studies have evaluated their effects in detail. Our aim was to investigate for the first time the effect of tablet size and head posture on drug swallowing by endoscopic evaluation in healthy subjects. Round tablets (7 , 10 , 12, and 14 mm in diameter) were swallowed by 15 healthy adults with an endoscope inserted in the neutral, head flex-ion, and head extension positions. Evaluation of swallowing difficulty using a numeric rating scale (NRS), presence or absence of pharyngeal residue and its location, and tablet oral transit time (TOTT) were recorded. In the neutral position, the NRS score was higher with the 14 mm tablets than with the 7 mm tablets. The TOTT with the 7 mm tablets was significantly shorter in the head extension than in the neutral position. Swallowing difficulty increased when the tablet diameter was more than 7 mm. Residues were found in the epi-glottis, pyriform sinus, and tongue base. These findings suggest that head extension shortens the TOTT and assists oral-pharyngeal transport., Competing Interests: No potential conflict of interest relevant to this article was reported.

Common practices to improve the ability to swallow include modifying physical properties of foods and changing the posture of patients. Here, we quantified the effects of the viscosity of a liquid bolus and patient posture on the bolus pathway and pharyngeal residue using a computational fluid dynamics simulation. We developed a computational model of an impaired pharyngeal motion with a low pharyngeal pressure and no pharyngeal adaptation. We varied viscosities from 0.002 to 1 Pa·s and postures from -15° to 30° (from nearly vertical to forward leaning). In the absence of pharyngeal adaptation, a honey-like liquid bolus caused pharyngeal residue, particularly in the case of forward-leaning postures. Although the bolus speed was different among viscosities, the final pathway was only slightly different. The shape, location, and tilting of the epiglottis effectively invited a bolus to two lateral pathways, suggesting a high robustness of the swallowing process. NEW & NOTEWORTHY Thickening agents are often used for patients with dysphagia. An increase in bolus viscosity not only reduces the risk of aspiration but also can cause a residual volume in the pharynx. Because information obtained from videofluoroscopic swallowing studies is only two-dimensional, measurement of pharyngeal residue is experimentally difficult. We successfully quantified the three-dimensional bolus pathway and the pharyngeal residual volume using computational modeling and simulation.