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Pulse oximetry does not reliably detect aspiration on videofluoroscopic swallowing study
Tyng-Guey Wang1, Yeun-Chung Chang, Ssu-Yuan Chen
1Department of Physical Medicine & Rehabilitation, National Taiwan University Hospital, College of Medicine, and National Taiwan University, Taipei. tgw@ha.mc.ntu.edu.tw
Archives of Physical Medicine and Rehabilitation
|April 14, 2005
Summary
Pulse oximetry is unreliable for detecting aspiration in patients with dysphagia. A decrease in oxygen saturation does not correlate with aspiration identified by videofluoroscopic swallowing studies (VFSS).
Area of Science:
- Clinical Medicine
- Diagnostic Technologies
- Swallowing Disorders
Background:
- Aspiration is a significant concern in patients with dysphagia.
- Pulse oximetry is a non-invasive tool used to monitor oxygen saturation.
- Videofluoroscopic swallowing study (VFSS) is a gold standard for assessing aspiration.
Purpose of the Study:
- To evaluate the reliability of pulse oximetry in identifying aspiration.
- To compare pulse oximetry findings with VFSS results in dysphagia patients.
Main Methods:
- A nonrandomized, prospective, double-blind study was conducted.
- Sixty patients with diagnosed dysphagia were enrolled.
- Arterial oxygen saturation (SpO2) was monitored via pulse oximetry during VFSS.
Main Results:
- No significant correlation was found between desaturation (SpO2 decrease >3%) and aspiration on VFSS (P =.87).
- Pulse oximetry demonstrated a low positive predictive rate (39.1%) for aspiration.
- The negative predictive rate for aspiration was also limited (59.4%).
Conclusions:
- Pulse oximetry is not a reliable indicator for predicting aspiration during VFSS.
- Further research is needed to determine the utility of pulse oximetry for aspiration detection during regular meals.