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Updated: Mar 30, 2026
Adapting Human Videofluoroscopic Swallow Study Methods to Detect and Characterize Dysphagia in Murine Disease Models
Published on: March 1, 2015
Incidence of Pneumonia After Videofluoroscopic Swallowing Study and Associated Factors
Hannae Jo1, Jung-Gyoo Park2, David Min1
1Department of Rehabilitation Medicine, Kangwon National University Hospital, Baengnyeong-ro 156, Chuncheon, Gangwon, 24289, South Korea.
Abstract:
Pneumonia after videofluoroscopic swallow study (VFSS) is sometimes considered to be caused by aspiration during VFSS; however, to our knowledge, a relationship between these events has not been clearly investigated. The aim of this study was to assess the incidence of VFSS-related pneumonia and related factors. Overall, 696 VFSS cases were retrospectively reviewed. Cases in which blood culture was performed within 3 days after VFSS due to newly developed infectious signs were considered as post-VFSS infection cases. Pneumonia was suspected when there was some evidence of respiratory infectious signs in clinical, radiological, and laboratory findings. The underlying disease, clinical signs, and VFSS findings of the pneumonia group were assessed. Among 696 cases, pneumonia was diagnosed in 15 patients. The patients in the pneumonia group tended to be older and had higher aspiration rate on VFSS than those in the non-pneumonia group. In the pneumonia group, 2 patients showed no aspiration during VFSS. In 6 patients, pneumonia developed after massive aspiration of gastric content in 5 patients and inappropriate oral feeding with risk of aspiration before VFSS in 1 patient. Only 7 patients (1.0 %) were finally determined as having VFSS-related pneumonia. In conclusion, the 72-h incidence of VFSS-related pneumonia was 1.0 %. Old age and severity of swallowing difficulty are associated with occurrence of pneumonia.
Insights
The 72-hour incidence of pneumonia following videofluoroscopic swallow studies (VFSS) is 1.0%. Older age and severe swallowing difficulties increase the risk of developing VFSS-related pneumonia.
Area of Science:
- Otolaryngology
- Pulmonology
- Radiology
Background:
- Pneumonia post-videofluoroscopic swallow study (VFSS) is often attributed to aspiration during the procedure.
- However, a clear causal link and incidence of VFSS-related pneumonia have not been well-established.
Purpose of the Study:
- To determine the incidence of pneumonia developing within 72 hours after VFSS.
- To identify factors associated with VFSS-related pneumonia.
Main Methods:
- Retrospective review of 696 VFSS cases.
- Inclusion criteria for post-VFSS infection: blood culture within 3 days of VFSS due to new infectious signs.
- Pneumonia diagnosis based on clinical, radiological, and laboratory evidence of respiratory infection.
Main Results:
- Pneumonia was diagnosed in 15 patients (2.2%) overall.
- Only 7 patients (1.0%) were definitively classified as having VFSS-related pneumonia.
- Patients with pneumonia were older and had higher aspiration rates during VFSS.
Conclusions:
- The incidence of VFSS-related pneumonia within 72 hours is 1.0%.
- Advanced age and the severity of dysphagia are significant risk factors for developing pneumonia after VFSS.
- While aspiration is a concern, other factors may contribute to post-VFSS pneumonia.
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