Oesophageal screening during videofluoroscopy: International practices and perspectives of speech-language pathologists

South of the UES: Improving the ability of speech-language pathologists to detect oesophageal abnormalities during videofluoroscopy swallowing studies

PURPOSE

With two-thirds of adults presenting for a videofluoroscopy swallow study (VFSS) with oesophageal abnormalities, it seems prudent to include visualisation of the oesophagus, in the context of the entire swallow process, to provide further information to the diagnostic team. This study aims to evaluate the ability of speech-language pathologists (SLPs) to interpret oesophageal sweep on VFSS and the relative improvement in that ability with additional training.

METHOD

One hundred SLPs attended training in oesophageal visualisation during VFSS, based on a previous study. Ten oesophageal sweep videos (five normal, five abnormal) with one 20 ml thin fluid barium bolus (19% w/v) were presented at baseline and following training. Raters were blinded to patient information other than age. Binary ratings were collected for oesophageal transit time (OTT), presence of stasis, redirection, and referral to other specialists.

RESULT

Inter-rater reliability as measured by Fleiss' kappa improved for all parameters, reaching statistical significance for OTT (pre-test kappa = 0.34, post-test kappa = 0.73; p < 0.01) and redirection (pre-test kappa = 0.38, post-test kappa = 0.49; p < 0.05). Overall agreement improved significantly (p < 0.001) for all parameters except stasis, where improvement was only slight. Interaction between pre-post and type of video (normal/abnormal) was statistically significant (p < 0.001) for redirection, with a large pre-post increase in positive accuracy compared with a slight pre-post decrease in negative accuracy.

CONCLUSION

Findings indicate that SLPs require training to accurately interpret an oesophageal sweep on VFSS. This supports the inclusion of education and training on both normal and abnormal oesophageal sweep patterns, and the use of standardised protocols for clinicians using oesophageal visualisation as part of the VFSS protocol.

The Introduction of a Protocol for Esophageal Screening in Videofluoroscopic Swallowing Studies: Exploring Clinical Impacts and Barriers

PURPOSE

Esophageal screening is a valuable inclusion in videofluoroscopic swallowing studies (VFSSs). However, routine standardized esophageal screening does not always occur in clinical practice. This study introduced and evaluated an esophageal screening protocol at one Australian hospital.

METHOD

Radiology, gastroenterology, and speech-language pathology endorsed an esophageal screening protocol, which followed a timed 20-ml International Dysphagia Diet Standardisation Initiative Level 0 bolus from mouth to stomach in an upright anterior-posterior position. Measures exploring clinical impacts and barriers were recorded. Participants were compared with 100 consecutive VFSS patients prior to the introduction of the esophageal screening protocol.

RESULTS

During the esophageal screening protocol trial, 163 VFSSs were conducted with recruited patients. Aspiration risk (29%, n = 47/163) and positioning limitation (3%, n = 5/163) were barriers to esophageal screening. Rates of esophageal screening significantly increased with the esophageal screening protocol (χ2 = 63.462, p < .001). There was no difference in radiation dose for patients who had esophageal screening and those who did not in the esophageal screening protocol group (U = 1689.000, p = .237). The VFSS team breached the esophageal screening protocol for some patients, when evaluating esophageal transit time (n = 28) and recommending gastroenterology referral (n = 6). There was no difference between groups for rates of gastroenterology consults (χ2 = 1.805, p = .188) or dysphagia procedures (χ2 = 1.951, p = .209).

CONCLUSIONS

This study confirms that routine esophageal screening provides additional clinical information to assist holistic dysphagia management without adverse operational impacts. Further research with the multidisciplinary dysphagia team has commenced to continue to optimize and refine esophageal screening practice.

Oesophageal screening in videofluoroscopic swallow studies: Perceptions and practices of Australian speech-language pathologists

PURPOSE

There is building evidence that oesophageal screening (OS) should be considered a critical component of videofluoroscopic swallow studies (VFSS). This study surveyed Australian speech-language pathologists (SLPs) regarding current practices and perceptions of OS in VFSS.

METHOD

A 16-24 item online survey was distributed to Australian SLPs via relevant email forums. One response per site was requested. Survey questions explored experience and training in VFSS, skill and confidence with OS, OS protocol use, and pathways following OS.

RESULT

One hundred and one SLPs across all Australian states and territories responded, with 70% (n = 69/99) from metropolitan hospitals and 74% (n = 75/101) having more than five years' VFSS experience. While 69% (n = 70/101) of SLPs conducted OS, only half (n = 35/70) conducted OS routinely, and only 4% (n = 3/70) always used published OS protocols. Barriers to OS, for some participants, were concerns about scope of practice and confidence.

CONCLUSION

This study confirms higher levels of OS in Australia compared to similar international surveys and provides rich data on the Australian context. Prescriptive clinical guidelines for OS, consensus regarding a preferred OS protocol, and specific OS training may clarify SLP scope of practice and improve SLP confidence and standardisation in OS.

The Modified Barium Swallow Study and Esophageal Screening: A Survey of Clinical Practice Patterns

PURPOSE

Modified barium swallow study (MBSS) is a videofluoroscopic evaluation of oropharyngeal swallowing. Views of esophageal bolus flow during MBSS are permitted under speech-language pathology practice guidelines. However, controversy exists over its implementation. Poor consensus and limited practice guidance may lead to clinical practice variations. Aims of the investigation were to (a) describe current practice patterns of speech-language pathologist visualizing bolus flow through the esophagus during the MBSS, (b) understand areas of variation when incorporating esophageal visualization during the MBSS, and (c) determine clinicians' willingness to modify MBSS procedures to include esophageal imaging.

METHOD

A web-based survey (Qualtrics XM) consisting of 26 questions was distributed via web posting and e-mail to members of the American Speech-Language-Hearing Association Special Interest Group 13 and Dysphagia Café. The survey was open for 3 months. Descriptive and associative statistics were completed. Field-testing was performed prior to dissemination of the survey to address content validity.

RESULTS

A total of 321 individuals participated; 265 responses were used for analysis. Ninety-three percent of respondents viewed the esophagus during the MBSS. Twelve percent followed to the proximal esophagus, 15% to the mid esophagus, 66% to the lower esophagus, and 6% to varied levels. Variability was also reported in contrast type, volume administered, and nomenclature used. Interestingly, few people (3.61%) disagreed that esophageal visualization should be performed during MBSS.

CONCLUSIONS

Speech-language pathology respondents in this study visualize contrast flow through the esophagus and are enthusiastic about expanding the standard MBSS. However, results of the survey demonstrate a lack of uniformity in assessment practices. Unfortunately, this may impact the diagnostic accuracy and clinical utility when adding esophageal visualization to the MBSS. This study highlights the need for a standardized protocol and identifies current barriers and controversies that may prevent expanding the MBSS to more comprehensively evaluate individuals with dysphagia.