Sensory Changes Related to Swallowing in Motor Neurone Disease.

Dysphagia is common in motor neurone disease (MND) and associated with negative health and psychosocial outcomes. Although largely considered a motor disease, a growing body of evidence suggests that MND can also affect the sensory system. As intact sensation is vital for safe swallowing, and sensory changes can influence the clinical management of dysphagia in people living with MND, this review evaluated and summarised the current evidence for sensory changes related to swallowing in MND. Of 3,481 articles originally identified, 29 met the inclusion criteria. Of these, 20 studies reported sensory changes, which included laryngeal sensation, taste, gag reflex, cough reflex, tongue sensation, smell, palatal and pharyngeal sensation, silent aspiration, and undefined sensation of the swallowing mechanism. Sensory changes were either described as decreased (n = 16) or heightened (n = 4). In the remaining nine studies, sensory function was reported as unaffected. The presence of changes to sensory function related to swallowing in MND remains inconclusive, although an increasing number of studies report sensory changes in some sensory domains. Future research is needed to evaluate the prevalence of sensory changes in MND and how such changes may influence dysphagia and its management.

Clinical reasoning during dysphagia assessment and management in acute care: A longitudinal qualitative study.

BACKGROUND: Competent clinical reasoning forms the foundation for effective and efficient clinical swallowing examination (CSE) and consequent dysphagia management decisions. While the nature of initial CSEs has been evaluated, it remains unclear how new information gathered by speech-language therapists (SLTs) throughout a patient's acute-care journey is integrated into their initial clinical reasoning and management processes and used to review and revise initial management recommendations. AIMS: To understand how SLTs' clinical reasoning and decision-making regarding dysphagia assessment and management evolve as patients transition through acute hospital care from referral to discharge. METHODS & PROCEDURES: A longitudinal, qualitative approach was employed to gather information from two SLTs who managed six patients at a metropolitan acute-care hospital. A retrospective 'think-aloud' protocol was utilized to prompt SLTs regarding their clinical reasoning and decision-making processes during initial and subsequent CSEs and patient interactions. Three types of concept maps were created based on these interviews: a descriptive concept map, a reasoning map and a hypothesis map. All concept maps were evaluated regarding their overall structure, facts gathered, types of reasoning engaged in (inductive versus deductive), types of hypotheses generated, and the diagnosis and management recommendations made following initial CSE and during subsequent dysphagia management. OUTCOMES & RESULTS: Initial CSEs involved a rich process of fact-gathering, that was predominantly led by inductive reasoning (hypothesis generation) and some application of deductive reasoning (hypothesis testing), with the primary aims of determining the presence of dysphagia and identifying the safest diet and fluid recommendations. During follow-up assessments, SLTs engaged in increasingly more deductive testing of initial hypotheses, including fact-gathering aimed at determining the tolerance of current diet and fluid recommendations or the suitability for diet and/or fluid upgrade and less inductive reasoning. Consistent with this aim, SLTs' hypotheses were focused primarily on airway protection and medical status during the follow-up phase. Overall, both initial and follow-up swallowing assessments were targeted primarily at identifying suitable management recommendations, and less so on identifying and formulating diagnoses. None of the patients presented with adverse respiratory and/or swallowing outcomes during admission and following discharge from speech pathology. CONCLUSIONS & IMPLICATIONS: Swallowing assessment and management across the acute-care journey was observed as a high-quality, patient-centred process characterized by iterative cycles of inductive and deductive reasoning. This approach appears to maximize efficiency without compromising the quality of care. The outcomes of this research encourage further investigation and translation to tertiary and post-professional education contexts as a clear understanding of the processes involved in reaching diagnoses and management recommendations can inform career-long refinement of clinical skills. WHAT THIS PAPER ADDS: What is already known on the subject SLTs' clinical reasoning processes during initial CSE employ iterative cycles of inductive and deductive reasoning, reflecting a patient-centred assessment process. To date it is unknown how SLTs engage in clinical reasoning during follow-up assessments of swallowing function, how they assess the appropriateness of initial management recommendations and how this relates to patient outcomes. What this paper adds to the existing knowledge Our longitudinal evaluation of clinical reasoning and decision-making patterns related to swallowing management in acute care demonstrated that SLTs tailored their processes to each patient's presentation. There was an emphasis on monitoring the suitability of the initial management recommendations and the potential for upgrade of diet or compensatory swallowing strategies. The iterative cycles of inductive and deductive reasoning reflect efficient decision-making processes that maintain high-quality clinical care within the acute environment. What are the potential or actual clinical implications of this work? Employing efficient and high-quality clinical reasoning is a hallmark of good dysphagia practice in maximizing positive patient outcomes. Developing approaches to understanding and making explicit clinical reasoning processes of experienced clinicians may assist SLTs of all developmental stages to provide high standards of care.

Implementing a Screen-Clean-Hydrate bundle of care for improving swallow screening, oral health, and hydration in acute stroke: Protocol for a Type 2 hybrid-effectiveness pre-post study.

Stroke clinical guidelines recommend care processes that optimize patient outcomes and minimize hospital-acquired complications. However, audits and surveys illustrate that recommended care is not always consistently or thoroughly implemented. This paper outlines the methods for implementing and evaluating a new bundle of care. Screen-Clean-Hydrate bundles together recommendations from the Australian Clinical Guidelines for Stroke Management and supplements these with evidence-informed best practice from the literature for: swallow screening within 4 h of presentation to hospital (Screen); oral health assessment and delivery of oral care (Clean); and hydration assessment and management (Hydrate). The study is a pre-post Type 2 hybrid effectiveness/implementation design with an embedded process evaluation, which will be conducted in two acute stroke units in a capital city of Australia. The integrated-Promoting Action on Research Implementation in Health Services (iPARIHS) framework will be used to guide study design, conduct, and evaluation. Clinical effectiveness will be measured by rates of hospital-acquired complications and proxy measures of cost (length of stay, procedure costs) for 60 patient participants pre- and postimplementation. Implementation outcomes will focus on acceptability, feasibility, uptake and fidelity, and identification of barriers and enablers to implementation through staff interviews, medical record audits, and researcher field notes. Due to its design as a hybrid effectiveness/implementation study, once completed, the study will provide information on both intervention and implementation effectiveness, including details of successful and unsuccessful multidisciplinary implementation strategies. This will inform a larger multisite effectiveness/implementation trial for future upscale, leading to improved compliance with stroke guidelines and therefore stroke outcomes.

Exploring clinical management of cognitive and behavioural deficits in MND. A scoping review.

OBJECTIVES: Little is known about how cognitive and behavioural decline in MND is managed clinically. This review aimed to summarise clinical management approaches of cognitive and behavioural decline in MND reported in peer-reviewed and grey literature. METHODS: A scoping review was conducted across Embase, Medline, Psychinfo and Emcare in October 2022. Grey literature was also searched across Google Scholar and Google in October 2022. RESULTS: A total of N = 26 studies and 8 documents were included. Thematic analysis revealed six key areas of clinical management: i. Assessment, ii. Education, iii. Advance Care Planning, iv. Adaptation of Care Plan, v. Communication and vi. Carer Support. CONCLUSIONS: The literature on management of cognitive and behavioural decline in MND is sparse. Most peer-reviewed literature consists of expert commentary and there is a lack of primary data to guide practitioners and families on how to manage cognitive and behavioural change in MND. PRACTICE IMPLICATIONS: Determining as early as practicable the presence of cognitive and behavioural changes in pwMND will enable practitioners to make adaptations to communication, provide education and supported decision-making for forward planning. This will enable individualised care, planned in partnership with families with MND, which incorporates personal needs and wishes.

Dysphagia-related acute stroke complications: A retrospective observational cohort study.

OBJECTIVES: Post-stroke dysphagia is associated with aspiration pneumonia, but strategies intended to mitigate this complication, such as oral intake modifications, may unintentionally lead to dehydration-related complications such as urinary tract infections (UTIs) and constipation. This study aimed to determine the rates of aspiration pneumonia, dehydration, UTI and constipation in a large cohort of acute stroke patients and the independent predictors of each complication. MATERIALS AND METHODS: Data were extracted retrospectively for 31,953 acute stroke patients admitted to six hospitals in Adelaide, South Australia over a 20-year period. Tests of difference compared rates of complications between patients with and without dysphagia. Multiple logistic regression modelling explored variables that significantly predicted each complication. RESULTS: In this consecutive cohort of acute stroke patients, with a mean (SD) age of 73.8 (13.8) years and 70.2% presenting with ischaemic stroke, rates of complications were: aspiration pneumonia (6.5%); dehydration (6.7%); UTI (10.1%); and constipation (4.4%). Each complication was significantly more prevalent for patients with dysphagia compared to those without. Controlling for demographic and other clinical variables, the presence of dysphagia independently predicted aspiration pneumonia (OR=2.61, 95% CI 2.21-3.07; p<.001), dehydration (OR=2.05, 95% CI 1.76-2.38; p<.001), UTI (OR=1.34, 95% CI 1.16-1.56; p<.001), and constipation (OR=1.30, 95% CI 1.07-1.59; p=.009). Additional predictive factors were increased age and prolonged hospitalisation. CONCLUSIONS: Aspiration pneumonia, dehydration, UTI, and constipation are common acute sequelae of stroke and independently associated with dysphagia. Future dysphagia intervention initiatives may utilise these reported complication rates to evaluate their impact on all four adverse health complications.

Parents' experiences of their child's transition from tube to oral feeding during an intensive intervention programme.

BACKGROUND: Persistent enteral tube feeding beyond the point of medical and/or physical necessity provides important nutrition to a child but may have implications for their development, gastrointestinal tract and quality of life. Tube dependency can affect parent-child relationships and sibling and family dynamics and place additional medical demands upon parents. It is therefore important to transition children from tube to oral eating and drinking as soon as is medically safe to do so. Tube weaning requires a skilled team to support the transition to oral intake; however, access to experienced teams is inconsistent. Without transparent discussions with their treating teams, many parents are left to navigate tube weaning options independently. METHODS: Fourteen parents were interviewed using semi-structured interviews. We explored the experiences of parents across their child's progression towards oral feeding, from the decision-making process to undertaking an intensive multi-disciplinary tube weaning programme. Thematic analysis of the parents' stories shaped the development of seven themes. RESULTS: Parents were unaware that tube weaning would be required and how that would be facilitated. They expressed a strong belief that their child could learn to eat-if afforded an opportunity. Furthermore, parents are prepared to disengage from current services if they feel they are not respected members of their child's therapeutic team. Three key learnings were identified relating to the need for tube exit plans, parents as key team members and parents as change agents. CONCLUSIONS: Parenting a tube-fed child, initiating and engaging in tube weaning, is a stressful and emotional journey. However, by establishing care partnerships, parents are willing to put trust in a process if provided with options and afforded autonomy, empowerment, acknowledgement and relevant support.

Behavioral Interventions Targeting Base of Tongue to Posterior Pharyngeal Wall Approximation: A Scoping Review.

Pharyngeal pressure generated by approximation of the base of tongue to the posterior pharyngeal wall (BOT-PPW approximation) is critical for efficient pharyngeal bolus passage and is a frequent goal of dysphagia management. This scoping review evaluated behavioral interventions available to improve BOT-PPW approximation. We searched MEDLINE, CINAHL, Ovid Emcare, Web of Science, SCOPUS, and ProQuest for studies that met the following criteria: (i) behavioral interventions targeting BOT-PPW approximation, which (ii) were assessed using BOT-PPW-specific outcome measures, and (iiia) performed over a period of time (Review Part 1) or (iiib) studied immediate effects (Review Part 2). Study quality was rated using the GRADE framework. Data were extracted and synthesized into dominant themes. Of the 150 studies originally identified, three examined long-term effects (two single cases studies of individuals with dysphagia, and a third study evaluating effortful swallowing in healthy individuals). BOT-PPW approximation only increased in the two single case studies. Twenty-one studies evaluating immediate effects were categorized as follows: (1) effortful swallowing, (2) Mendelsohn maneuver, (3) tongue-hold maneuver, (4) super supraglottic swallowing maneuver, and (5) non-swallowing exercises. Across all studies, varying levels of success in increasing BOT-PPW approximation were reported. Four of 21 immediate effects studies evaluated patients with demonstrated swallowing impairment, whereas 17 studies evaluated healthy adults. Quality assessment revealed low strength of the existing evidence base. The evidence base for rehabilitative interventions targeting BOT-PPW approximation is severely limited and translation is hindered by small sample sizes and methodological limitations. Further clinical research is warranted.

Patient suitability for free water protocols in acute stroke and general medicine: a qualitative study of clinician perceptions.

BACKGROUND: The free water protocol (FWP) is an alternate management strategy for patients with dysphagia, who would otherwise be nil by mouth or prescribed thickened fluids, allowing them to drink and potentially aspirate water under strict guidelines to minimize the risk of adverse consequences. The FWP is not widely implemented in acute settings, and it is unclear whether this is due to the complexity of patient presentations, clinician decision-making or barriers related to the setting. AIMS: To explore the perceptions and decision-making process of clinicians about using FWPs to manage dysphagia for patients admitted to acute stroke and general medicine. METHODS & PROCEDURES: A qualitative, critical realist approach was adopted to allow for in-depth exploration of the perspectives of four dietitians, seven medical officers, eight registered nurses and 17 speech and language pathologists (SLPs) from three hospitals in a capital city of Australia. Data from semi-structured interviews were analysed using the Situated Clinical Decision-Making Framework (CDF). OUTCOMES & RESULTS: Participants were cautious about FWP for patients with neurological conditions, head and neck cancer, dementia, poor immunity, chronic or recurrent respiratory illness, and certain types of stroke. Medical status and the implications for aspiration were paramount, particularly respiratory status, oxygen supplementation, cognitive status, fatigue and mobility. Participants considered patient quality of life, preferences and choices for care, but indicated that factors influencing safety often outweighed patient preference for water. Indirect factors affecting decision-making included the roles of the multidisciplinary team, individual clinical experience and attitude to risk, and availability of supervision. CONCLUSIONS & IMPLICATIONS: Despite the benefits of FWPs in other settings, in acute stroke and general medicine, clinicians erred on the side of safety and, in most cases, would not implement an FWP. Future clinical research is needed to systematically design high-quality and feasible clinical trials to determine the benefits and safety of FWPs for patients with dysphagia in these settings. This would lay the foundations for guidelines to support the complex clinical decision-making regarding patient suitability for FWPs. WHAT THIS PAPER ADDS: What is already known on the subject FWPs are an alternate management strategy for patients with dysphagia, with systematic reviews recommending their use for adults in inpatient rehabilitation with a low risk of pneumonia. However, evidence from the acute setting is sparse, leaving clinicians unsure about which patients might benefit and which may inadvertently be exposed to increased risk by an FWP. What this paper adds to existing knowledge Participants from all interviewed disciplines agreed that SLPs lead the decision-making process and as such act as 'gatekeepers' for access to an FWP. The decision-making process is complex, and participants acknowledged that disease conditions and illnesses were often used as exclusionary criteria. Although participants reported favourably on the benefits of FWPs, their decision-making privileged risk aversion over patient preference in most settings, except for palliative care. Lack of clinical guidelines and research evidence in acute care settings, as well as the focus on risk aversion, appear to perpetually reinforce the avoidance of FWP in these settings. Of note, more senior clinicians acknowledged being more deliberately guided by patient preference; hence, leadership by senior clinicians appears critical for change in practice in this space. What are the potential or actual clinical implications of this work? If evidence about the safety of FWP in the acute settings is to be collected, a systematic approach to addressing the present barriers is warranted. This may allow rigorous clinical trials to proceed and potentially lead to best-practice guidelines for dysphagia management options for wider populations of patients.

Swallowing biomechanics before and following multi-level upper airway surgery for obstructive sleep apnea.

STUDY OBJECTIVES: The effect of contemporary multi-level upper airway surgery for obstructive sleep apnea on swallowing is unclear. This study assessed the biomechanical swallowing function in participants with obstructive sleep apnea pre- and post-modified uvulopalatopharyngoplasty and coblation channeling of the tongue. METHODS: In this prospective, longitudinal study, adults diagnosed with moderate-severe obstructive sleep apnea who underwent modified uvulopalatopharyngoplasty and coblation channeling of the tongue surgery had swallowing biomechanics assessed using high-resolution pharyngeal manometry and analyzed with swallowgateway.com. Symptomatic swallowing difficulty was evaluated using the Sydney Swallow Questionnaire (≥ 234). General linear mixed-model analysis was conducted to evaluate the difference pre- and post-modified uvulopalatopharyngoplasty and coblation channeling of the tongue. Data are presented as mean [95% confidence intervals]. RESULTS: High-resolution pharyngeal manometry assessments were conducted in 10 participants (7 men; median age 50 [interquartile range 36-65]) preoperatively and repeated postoperatively at 9 months [interquartile range 6-13]. Self-reported dysphagia was unchanged following surgery (Sydney Swallow Questionnaire =149 [53, 447] to 168 [54, 247]; P = .093). High-resolution pharyngeal manometry outcomes indicated reduced mesopharyngeal pressures (148 [135, 161] to 124 [112, 137] mm Hg s cm; P = .011), reduced hypopharyngeal pressures (113 [101, 125] to 93 [84, 102] mm Hg s cm; P = 0.011), and reduced upper esophageal sphincter relaxation pressure (5 [4, 6] to 2 [1,3] mm Hg; P = 0.001) but no change to velopharyngeal pressures (135 [123, 147] to 137 [117, 157] mm Hg s cm; P = .850) postsurgery. CONCLUSIONS: Modified uvulopalatopharyngoplasty may have less implications on the swallow mechanism than previously suspected. In contrast, the reduction in mesopharyngeal contractile pressures associated with coblation channeling of the tongue, although within normal limits, may affect bolus propulsion. Biomechanical alterations were insufficient to worsen self-reported swallowing function. CITATION: Schar MS, Omari TI, Woods CW, et al. Swallowing biomechanics before and following multi-level upper airway surgery for obstructive sleep apnea. J Clin Sleep Med. 2022;18(4):1167-1176.

The prevalence of post-extubation dysphagia in critically ill adults: an Australian data linkage study.

Objective: To define the prevalence of dysphagia after endotracheal intubation in critically ill adult patients. Design: A retrospective observational data linkage cohort study using the Australian and New Zealand Intensive Care Society Adult Patient Database and a mandatory government statewide health care administration database. Setting: Private and public intensive care units (ICUs) within Victoria, Australia. Participants: Adult patients who required endotracheal intubation for the purpose of mechanical ventilation within a Victorian ICU between July 2013 and June 2018. Main outcome measures: Presence of dysphagia, aspiration pneumonia, ICU length of stay, hospital length of stay, and cost per episode of care. Results: Endotracheal intubation in the ICU was required for 71 124 patient episodes across the study period. Dysphagia was coded in 7.3% (n = 5203) of those episodes. Patients with dysphagia required longer ICU (median, 154 [interquartile range (IQR), 78-259] v 53 [IQR, 27-107] hours; P < 0.001) and hospital admissions (median, 20 [IQR, 13-30] v 8 [IQR, 5-15] days; P < 0.001), were more likely to develop aspiration pneumonia (17.2% v 5.6%; odds ratio, 3.0; 95% CI, 2.8-3.2; P < 0.001), and the median health care expenditure increased by 93% per episode of care ($73 586 v $38 108; P < 0.001) compared with patients without dysphagia. Conclusions: Post-extubation dysphagia is associated with adverse patient and health care outcomes. Consideration should be given to strategies that support early identification of patients with dysphagia in the ICU to determine if these adverse outcomes can be reduced.

Transient hypopharyngeal intrabolus pressurization patterns: Clinically relevant or normal variant?

INTRODUCTION: In oropharyngeal dysphagia, impaired pharyngoesophageal junction (PEJ) opening is reflected by an elevated hypopharyngeal intrabolus pressure (IBP), quantifiable using pharyngeal high-resolution manometry with impedance (P-HRM-I). Transient intrabolus pressurization (TP) phenomena are not sustained and last for only a brief period. We hypothesized that TP patterns reflect impaired coordination between timing of hypopharyngeal bolus arrival and PEJ relaxation. METHODS: A retrospective audit was conducted of P-HRM-I datasets; 93 asymptomatic Controls and 214 Patients with differing etiological/clinical backgrounds were included. TP patterns were examined during 10ml liquid swallows. TP was defined by a simultaneous, non-sustained, pressurization wave spanning from the velo-/meso-pharynx to PEJ. The coordination between deglutitive pharyngeal bolus distension and PEJ relaxation timing was assessed using timing variables; (i) Distention-Contraction Latency (DCL, s) and (ii) PEJ Relaxation Time (RT, s). Resultant flow resistance was quantified (IBP, mmHg). RESULTS: TP swallows were observed in 87 (28%) cases. DCL was not significantly different in relation to TP, while PEJ relaxation time was shorter, and IBP was higher during TP swallows. In Patients RT-DCL time difference correlated with IBP (r -0.368, p < 0.01). CONCLUSION: Bolus distension and PEJ relaxation were miss-timed during TP swallows, impeding bolus flow and leading to a brief period of pressurization of the pharyngeal chamber by muscular propulsive forces. While TP swallows were identified in both Controls and Patients, increased IBPs were most apparent for Patient swallows indicating that the extent of IBP increase may differentiate pathological TP swallows.

Behavioral Interventions Targeting Insufficient Upper Esophageal Sphincter Opening During Swallowing: A Scoping Review.

The upper esophageal sphincter (UES) plays a central role in safe swallowing. Impaired UES opening is commonly observed in individuals presenting with impaired swallowing and various interventions are available aiming to improve bolus passage across the UES during swallowing. This scoping review addressed the following question: Which behavioral interventions are available to improve UES opening for deglutition? We searched MEDLINE, CINAHL, Ovid Emcare, Web of Science, SCOPUS and ProQuest for studies that met the following criteria: i. behavioral interventions targeting UES opening ii. performed over a period of time, which iii. were assessed using UES specific outcome measures. Study quality was assessed using the Joanna Briggs Institute and GRADE frameworks. Data were extracted and synthesized into dominant themes. Of the 357 studies originally identified, 15 met inclusion criteria and reported interventions that were grouped into four intervention types: (1) floor of mouth exercises that were sub-categorized into the Shaker exercise and other strengthening exercises, (2) Mendelsohn maneuver, (3) lingual exercises and (4) mixed exercise paradigms. Across the included studies, varying levels of success in improving various aspects of UES opening metrics were reported. Nine of 15 studies evaluated patients with demonstrated swallowing impairment, whereas six studies evaluated healthy adults. Quality assessment revealed significant variability in study quality, unclear reporting of participant training and treatment fidelity, as well as training dosage. The evidence base for the four behavioral intervention approaches targeting deglutitive UES opening is limited. The translation of existing evidence to clinical practice is hindered by small sample sizes and methodological limitations. Further research in this space is warranted.

The incidence and clinical outcomes of postextubation dysphagia in a regional critical care setting.

BACKGROUND: Postextubation dysphagia (PED) has been shown to occur in 41% of critically ill patients requiring endotracheal intubation. With one-third of patients with PED experiencing silent aspiration, it is reasonable to anticipate negative health outcomes are likely, although this has not yet been systematically explored in an Australian context. OBJECTIVES: The aim of the study was to determine the impact of PED, in a regional Australian intensive care unit (ICU), on rates of pneumonia, the length of stay in the ICU and hospital, and healthcare expenditure. METHODS: This study was conducted as a retrospective cohort analysis, which used administrative healthcare data of patients who received endotracheal intubation for invasive mechanical ventilation. Patients with a tracheostomy or known pre-existing dysphagia were excluded. RESULTS: A total of 822 patient episodes were identified, of which 7% (n = 58) presented with PED. Half of all patients within the PED cohort (53%) were intubated for fewer than 48 h. Patients with PED had a longer median length of stay in the ICU (5 days versus 3 days, p < 0.001) and were more likely to develop pneumonia (odds ratio = 2.51, 95% confidence interval = 1.28, 4.95) than extubated patients without dysphagia. Median cost per hospital admission for patients with PED was double that for extubated patients without dysphagia (AUD $42,685 versus AUD $20,840, p < 0.001). CONCLUSIONS: This study highlights that even a short duration of intubation may carry a risk of PED. The presence of PED, regardless of duration of intubation, increased the rates of pneumonia, length of stay in the ICU and hospital, and healthcare expenditure.

Risk Factors for Postextubation Dysphagia: A Systematic Review and Meta-analysis.

OBJECTIVES/HYPOTHESIS: To identify, describe, and where possible meaningfully synthesize the reported risk factors for postextubation dysphagia (PED) in critically ill patients. STUDY DESIGN: Systematic review and meta-analysis. METHODS: A systematic search of peer-reviewed and grey literature was conducted in common scientific databases to identify previously evaluated risk factors of PED. Data extraction and risk of bias assessment used a double-blind approach. Random effects models were used for the meta-analyses. Meta-analyses were conducted where sufficient study numbers allowed after accounting for statistical and clinical heterogeneity. RESULTS: Twenty-five studies were included, which investigated a total of 150 potential risk factors. Of these, 63 risk factors were previously identified by at least one study each as significantly increasing the risk of PED. After accounting for clinical and statistical heterogeneity, only two risk factors were suitable for meta-analysis, gender, and duration of intubation. In separate meta-analyses, neither gender (RR 1.00 [0.71, 1.43], I2  = 0%) nor duration of intubation (RR 1.54 [-0.40, 3.49], I2  = 0%) were significant predictors of PED. CONCLUSIONS: A large number of risk factors for PED have been reported in the literature. However, significant variability in swallowing assessment methods, patient populations, timing of assessment, and duration of intubation prevented meaningful meta-analyses for the majority of these risk factors. Where meta-analysis was possible, gender and duration of intubation were not identified as risk factors for PED. We discuss future directions in clinical and research contexts. Laryngoscope, 132:364-374, 2022.

Implementation of free water protocols in acute care: An observation of practice.

Purpose: Evidence supporting free water protocols (FWP) in acute settings is limited and the potential risks and benefits for acutely ill patients are not well understood. This study aimed to observe how and with whom FWPs are implemented in acute stroke and general medical units.Method: Mixed methods parallel case study design. Medical and nursing records were evaluated for information pertaining to the implementation of the FWP and outcomes for three patients. Semi-structured interviews conducted with three patient-nurse-speech-language pathologist triads focussed on clinical decision-making and barriers and enablers to FWP implementation. Data were analysed descriptively and triangulated across sources.Result: Patients identified as suitable for a FWP had markedly different presentations to those described in the evidence-base and FWP were consequently significantly adapted. Although patients were permitted water, they received and consumed very small amounts. Speech-language pathologists and nurses identified more barriers than enablers to FWP implementation; cognitive impairments, reliance on others and insufficient documentation were perceived as the key barriers, while clear verbal communication was identified as a facilitator.Conclusion: Overall the findings suggest FWP implementation in the acute care setting is hindered by a lack of standardised procedures and current evidence-base that would otherwise inform best practice.

Identification of nutritional risk in the acute care setting: progress towards a practice and evidence informed systems level approach.

BACKGROUND: To improve nutritional assessment and care pathways in the acute care setting, it is important to understand the indicators that may predict nutritional risk. Informed by a review of systematic reviews, this project engaged stakeholders to prioritise and reach consensus on a list of evidence based and clinically contextualised indicators for identifying malnutrition risk in the acute care setting. METHODS: A modified Delphi approach was employed which consisted of four rounds of consultation with 54 stakeholders and 10 experts to reach consensus and refine a list of 57 risk indicators identified from a review of systematic reviews. Weighted mean and variance scores for each indicator were evaluated. Consistency was tested with intra class correlation coefficient. Cronbach's alpha was used to determine the reliability of the indicators. The final list of indicators was subject to Cronbach's alpha and exploratory principal component analysis. RESULTS: Fifteen indicators were considered to be the most important in identifying nutritional risk. These included difficulty self-feeding, polypharmacy, surgery and impaired gastro-intestinal function. There was 82% agreement for the final 15 indicators that they collectively would predict malnutrition risk in hospital inpatients. CONCLUSION: The 15 indicators identified are supported by evidence and are clinically informed. This represents an opportunity for translation into a novel and automated systems level approach for identifying malnutrition risk in the acute care setting.

Videofluoroscopic and manometric outcomes of cricopharyngeus balloon dilation for treatment of pharyngo-esophageal dysphagia associated with nasopharyngeal cancer: A case series.

BACKGROUND: Problems with pharyngo-esophageal bolus flow have been reported following nasopharyngeal cancer (NPC) treatment. While studies using videofluoroscopic assessment have shown balloon dilation can help address this impairment, the impact of dilation on pressure and bolus flow characteristics incorporating high-resolution pharyngeal manometry (HRPM) has not been reported. METHODS: Five cases with pharyngo-esophageal dysphagia post NPC underwent balloon dilation. Videofluoroscopic swallowing study (VFSS) and HRPM were completed before and 1 month post dilation. Oral intake and dysphagia related quality of life were reported to 3 months. RESULTS: VFSS, manometry and functional outcomes revealed positive benefits from dilation in two cases. In the other three cases, two showed improvements on VFSS only. These three failed to make functional swallowing gains. CONCLUSIONS: Where there was functional gain, both fluoroscopy and HRPM recorded improvement to UES function. Across the cases, response to dilation was variable and further work is needed to determine which patients would receive most benefit. LEVEL OF EVIDENCE: 4.

Altered swallowing biomechanics in people with moderate-severe obstructive sleep apnea.

STUDY OBJECTIVES: Dysphagia is a common but under-recognized complication of obstructive sleep apnea (OSA). However, the mechanisms remain poorly described. Accordingly, the aim of this study was to assess swallowing symptoms and use high-resolution pharyngeal manometry to quantify swallowing biomechanics in patients with moderate-severe OSA. METHODS: Nineteen adults (4 female; mean (range) age, 46 ± 26-68 years) with moderate-severe OSA underwent high-resolution pharyngeal manometry testing with 5-, 10-, and 20-mL volumes of thin and extremely thick liquids. Data were compared with 19 age- and sex-matched healthy controls (mean (range) age, 46 ± 27-68 years). Symptomatic dysphagia was assessed using the Sydney Swallow Questionnaire. Swallow metrics were analyzed using the online application swallowgateway.com. General linear mixed model analysis was performed to investigate potential differences between people with moderate-severe OSA and controls. Data presented are means [95% confidence intervals]. RESULTS: Twenty-six percent (5 of 19) of the OSA group but none of the controls reported symptomatic dysphagia (Sydney Swallow Questionnaire > 234). Compared with healthy controls, the OSA group had increased upper esophageal sphincter relaxation pressure (-2 [-1] vs 2 [1] mm Hg, F = 32.1, P < .0001), reduced upper esophageal sphincter opening (6 vs 5 mS, F = 23.6, P < .0001), and increased hypopharyngeal intrabolus pressure (2 [1] vs 7 [1] mm Hg, F = 19.0, P < .05). Additionally, upper pharyngeal pressures were higher, particularly at the velopharynx (88 [12] vs 144 [12] mm Hg⋅cm⋅s, F = 69.6, P < .0001). CONCLUSIONS: High-resolution pharyngeal manometry identified altered swallowing biomechanics in people with moderate-severe OSA, which is consistent with a subclinical presentation. Potential contributing mechanisms include upper esophageal sphincter dysfunction with associated upstream changes of increased hypopharyngeal distension pressure and velopharyngeal contractility. CITATION: Schar MS, Omari TI, Woods CM, et al. Altered swallowing biomechanics in people with moderate-severe obstructive sleep apnea. J Clin Sleep Med. 2021;17(9):1793-1803.

The impact of cognitive decline in amyotrophic lateral sclerosis on swallowing. A scoping review.

Purpose: Impaired swallowing is a serious symptom of amyotrophic lateral sclerosis (ALS) impacting on health and wellbeing. Little is known about how cognitive impairment in amyotrophic lateral sclerosis impacts on oropharyngeal swallowing. A scoping review was undertaken to explore how cognitive impairment impacts on a person living with ALS's (plwALS) ability to understand and manage oropharyngeal swallowing function.Method: Subject headings and keywords were searched across MEDLINE, SCOPUS, CINAHL, PsychINFO, Emcare and Google Scholar in May 2019. Articles containing information on amyotrophic lateral sclerosis and cognition and swallowing were reviewed. A secondary search was conducted in July 2020 with broadened search terms.Result: The primary search identified 1055 articles, and 47 were included for full-text review. Of these, no articles directly met the inclusion criteria of both cognitive impairment and swallowing. The secondary search with broadened terms identified an additional 762 studies, and 9 were included for full-text review, but none met the inclusion criteria. Consequently, thematic analysis was completed on articles from the full-text review to identify themes that related to both cognition and swallowing. The themes identified were: (i) early specialised multidisciplinary management of ALS achieves better outcomes; (ii) cognitive impairment impacts on management; and (iii) impaired swallowing occurs in nearly all people living with ALS and is a serious symptom of the disease.Conclusion: The interaction between cognitive impairment and oropharyngeal swallowing function in ALS has not been investigated. This is important, as cognitive impairment impacts insight and decision-making and may have implications for oropharyngeal swallowing management.