Diagnostic methods for the detection of anterograde aspiration in enterally fed patients

Oral Intake Difficulty and Aspiration Pneumonia Assessment Using High-Resolution Manometry

OBJECTIVE

The sequential generation of swallowing pressure (SP) from the nasopharynx to the proximal esophagus is important for the bolus to pass from the oral cavity to the esophagus. The purpose of this study was to investigate the correlation of the SP sequence mode on high-resolution manometry (HRM) with oral intake difficulty and aspiration pneumonia.

METHODS

Consecutive patients with dysphagia who were admitted to our dysphagia clinic between November 2016 and November 2020 were enrolled in this cross-sectional study. We classified the HRM pressure topography data according to the SP sequence mode into type A, normal; B, partially decreased; C, totally decreased; and D, sequence disappeared, and according to the upper esophageal sphincter (UES) during pharyngeal swallowing into type 1, flattening and 2, non-flattening. Clinical dysphagia severity was determined based on oral intake difficulty and aspiration pneumonia.

RESULTS

In total, 202 patients with dysphagia (mean [standard deviation] age, 68.3 [14.5] years; 140 [69.8%] male) were enrolled. Type C (odds ratio [OR], 10.48; 95% confidence interval [CI], 2.89-51.45), type D (OR, 19.90; 95% CI, 4.18-122.35), and type 2 (OR, 6.36; 95% CI, 2.88-14.57) were significantly related to oral intake difficulty. Type C (OR, 3.23; 95% CI, 1.08-11.12) and type 2 (OR, 4.18; 95% CI, 1.95-9.15) were significantly associated with aspiration pneumonia.

CONCLUSION

The failure of sequential generation of SP was associated with higher risk of oral intake difficulty and aspiration pneumonia. These assessments are useful in understanding the pathophysiology and severity of dysphagia and in selecting safety nutritional management methods.

LEVEL OF EVIDENCE

4 Laryngoscope, 134:2127-2135, 2024.

Evaluation of Dysphagia and Inhalation Risk in Neurologically Impaired Children Using Esophageal High-Resolution Manometry with Swallowing Analysis

BACKGROUND

Dysphagia in neurologically impaired children is associated with feeding difficulties, malnutrition and aspiration pneumonia. Esophageal high-resolution manometry (HRM) has been used in the diagnosis of motility disorders affecting the swallowing process. The aim of this study was to analyze swallowing functions in NI children by using HRM in order to establish swallow parameters identifying inhalation risk.

METHODS

Twenty-five NI children with cerebral palsy were submitted to esophageal HRM with UES analysis, comparing the results with non-NI children. The following parameters were evaluated: maximum pressure and duration of contraction of the velopharynx (VP) and tongue base (TB), and maximal, minimal, resting pressure and relaxation duration of the upper esophageal sphincter (UES).

RESULTS

pVP max, pTB max, pUES max and resting pressure were lower, while p UES minimal was higher and relaxation duration was shorter in NI children vs. the control group. Predictive values of inhalation risk were evaluated.

CONCLUSIONS

This study evaluates inhalation risk in NI children using HRM to study UES function. Our results confirm the alterations described in NI children: insufficient contraction and clearing force for bolus transmission through the pharynx and incomplete UES relaxation can predispose to pharyngeal residues and inhalation independently of swallowing because of lower values of UES resting.

Changes in Pharyngeal Width Over Time as an Indicator of Dysphagia in Stroke Patients

Objective

To verify the pharyngeal width at rest as a measurement that could be used to assess changes in the degree of dysphagia over time in stroke patients.

Methods

In a cohort of stroke patients, we performed serial measurements of the pharyngeal width at the midpoints of the second (C2) and third (C3) cervical vertebral bodies using lateral neck X-rays while the patients were at rest. The JOSCYL width, a parameter named after the first initial of each developers’ surname and defined as the average value of the upper and lower pharyngeal widths, was used to formulate the JOSCYL scale, which was calculated as the JOSCYL width × 100/neck circumference. All patients also underwent serial videofluoroscopic swallowing studies (VFSSs). The Spearman correlation analysis was used to detect correlations between the serial VFSS results, JOSCYL widths, and JOSCYL scale values.

Results

Over time, we observed significant positive and negative correlations of change in the JOSCYL width and scale with changes in the Penetration-Aspiration Scale and the Dysphagia Outcome and Severity Scale scores, respectively.

Conclusion

The JOSCYL width and JOSCYL scale clearly reflected changes in dysphagia in stroke patients over time. These parameters may provide an easier method for evaluating whether post-stroke dysphagia has been alleviated.

The Gugging Swallowing Screen in dysphagia screening for patients with stroke: A systematic review

BACKGROUND

Dysphagia in patients with stroke can cause serious complications, such as aspiration and pneumonia, that often lead to increase in mortality and length of hospitalization. Several screening tests for dysphagia have been developed and are used in clinical practice to prevent dysphagia complications. The Gugging Swallowing Screen is 1 such screening test. It is suggested for use in the assessment of the ability of patients to swallow fluid and non-fluid foods separately. It also promotes effective communication between healthcare providers.

OBJECTIVES

We aimed to investigate the validity and benefit of the Gugging Swallowing Screen.

DESIGN

This was a systematic review.

DATA SOURCE

We sourced data from electronic databases including Ovid MEDLINE, Ovid EMBASE, the Cochrane Library, KoreaMed, Research Information Sharing Service, and Korean studies Information Service System.

REVIEW METHODS

We conducted a systematic review of electronic databases. We included studies published in English and Korean up to November 2018 that pertained to the Gugging Swallowing Screen. We designed strategies that included Medical Subject Headings and keywords, such as "dysphagia," "swallowing," "assessment," "screening," and "GUSS," used alone or in combination.

RESULTS

Of the 297 studies that appeared in the search result, 219 articles were reviewed by 2 independent reviewers after duplicate studies were eliminated. Finally, 8 articles were included in this study. With regard to validity, the Gugging Swallowing Screen had a pooled sensitivity of 0.97 (95% confidence interval: 0.93-0.99), a pooled specificity of 0.67 (95% confidence interval: 0.59-0.74), and an area under the receiver operating characteristic curve of 0.9381. With regard to benefit, early systematic dysphagia screening using Gugging Swallowing Screen performed by nurses reduced both screening time and pneumonia rate compared to the control group (p = 0.004). The incidence of X-ray-verified pneumonia was significantly lower in the Gugging Swallowing Screen group than in the clinical screening group (p ˂ 0.01), but no significant difference was observed in the incidence of pneumonia compared to the value predicted using the 10 mL water swallowing test.

CONCLUSIONS

The Gugging Swallowing Screen is a reliable and sensitive tool for screening dysphagia. Early and systematic assessment can prevent aspiration and pneumonia. However, further studies are needed to confirm the effectiveness of this tool.

Study of Dysphagia in Patients with Advanced Oropharyngeal Cancer Subjected to an Organ Preservation Protocol Based on Concomitant Radiotherapy and Chemotherapy

Introduction:

Organ preservation protocol (based on chemo-radiotherapy) for oropharyngeal tumors include dysphagia as a possible sequel leading to function impairment and changes in patient’s quality of life.

Objectives:

The aim of this study is to assess dysphagia severity after treatment in advanced oropharyngeal cancer patients treated with concurrent chemo-radiation.

Methods:

This prospective cross-sectional study included 64 participants who had been disease free for at least six months after primary treatment. Dysphagia severity was assessed by fibre-optic endoscopic evaluation of swallowing (FEES) and the Dysphagia Outcome and Severity Scale (DOSS); the occurrence of penetration/aspiration during swallowing was also investigated. All participants also completed the M. D. Anderson Dysphagia Inventory (MDADI). The correlation of FEES results with clinical-demographic variables and MDADI scores was assessed. Descriptive analysis was performed, and qualitative variables were compared using either the chi-square or Fisher’s exact test.

Results:

FEES revealed silent aspiration in 18.8% of the patients. Approximately 6.3% of the patients exhibited severe dysphagia (scores 1-2 in DOSS). Dysphagia severity was significantly associated with the MDADI physical domain scores. The participants with scores 5-7 in DOSS (no or mild dysphagia) exhibited less limitations in the MDADI physical domain (p=0.015).

Conclusions:

Silent aspiration was detected in one of every five patients treated with concurrent chemo-radiotherapy; almost half of the patients exhibit at least moderate dysphagia. Assessment of the participant’s quality of life via the MDADI revealed an association between the physical domain scores and dysphagia severity.

Quantitative Analysis of Swallowing Function Between Dysphagia Patients and Healthy Subjects Using High-Resolution Manometry

Objective

To compare swallowing function between healthy subjects and patients with pharyngeal dysphagia using high resolution manometry (HRM) and to evaluate the usefulness of HRM for detecting pharyngeal dysphagia.

Methods

Seventy-five patients with dysphagia and 28 healthy subjects were included in this study. Diagnosis of dysphagia was confirmed by a videofluoroscopy. HRM was performed to measure pressure and timing information at the velopharynx (VP), tongue base (TB), and upper esophageal sphincter (UES). HRM parameters were compared between dysphagia and healthy groups. Optimal threshold values of significant HRM parameters for dysphagia were determined.

Results

VP maximal pressure, TB maximal pressure, UES relaxation duration, and UES resting pressure were lower in the dysphagia group than those in healthy group. UES minimal pressure was higher in dysphagia group than in the healthy group. Receiver operating characteristic (ROC) analyses were conducted to validate optimal threshold values for significant HRM parameters to identify patients with pharyngeal dysphagia. With maximal VP pressure at a threshold value of 144.0 mmHg, dysphagia was identified with 96.4% sensitivity and 74.7% specificity. With maximal TB pressure at a threshold value of 158.0 mmHg, dysphagia was identified with 96.4% sensitivity and 77.3% specificity. At a threshold value of 2.0 mmHg for UES minimal pressure, dysphagia was diagnosed at 74.7% sensitivity and 60.7% specificity. Lastly, UES relaxation duration of <0.58 seconds had 85.7% sensitivity and 65.3% specificity, and UES resting pressure of <75.0 mmHg had 89.3% sensitivity and 90.7% specificity for identifying dysphagia.

Conclusion

We present evidence that HRM could be a useful evaluation tool for detecting pharyngeal dysphagia.

Ability of High-Resolution Manometry to Determine Feeding Method and to Predict Aspiration Pneumonia in Patients With Dysphagia

OBJECTIVES

The introduction of high-resolution manometry (HRM) offered an improved method to objectively analyze the status of pharynx and esophagus. At present, HRM for patients with oropharyngeal dysphagia has been poorly studied. We aimed to determine feeding method and predict the development of aspiration pneumonia in patients with oropharyngeal dysphagia using HRM.

METHODS

We recruited 120 patients with dysphagia who underwent both HRM and videofluoroscopic swallow study. HRM was used to estimate pressure events from velopharynx (VP) to upper esophageal sphincter (UES). Feeding methods were determined to non-oral or oral feeding according to dysphagia severity. We prospectively followed patients to assess the development of aspiration pneumonia.

RESULTS

VP maximal pressure and UES relaxation duration were independently associated with non-oral feeding. Non-oral feeding was determined based on optimal cutoff value of 105.0 mm Hg for VP maximal pressure (95.0% sensitivity and 70.0% specificity) and 0.45 s for UES relaxation duration (76.3% sensitivity and 57.5% specificity), respectively. During a mean follow-up of 18.8 months, 15.8% of patients developed aspiration pneumonia. On multivariate Cox regression analysis, VP maximal pressure (P<0.01) and UES relaxation duration (P<0.05) independently predicted the development of aspiration pneumonia. Cumulative incidence of aspiration pneumonia was significantly increased in patients with readings below optimal cutoff values for VP maximal pressure (P<0.01) and UES relaxation duration (P<0.01), individually.

CONCLUSIONS

We first established the optimal thresholds for HRM parameters to determine feeding method and predict the development of aspiration pneumonia in patients with oropharyngeal dysphagia.