Stir, Shake or Blend: A Comparison of Methods Used to Reduce Viscosity of Blenderized Tube Feedings

Blenderized tube feeding (BTF) refers to formula composed of whole foods and purees, blended to a consistency that can be administered through an enteral feeding device. BTFs have a higher viscosity than conventional enteral formulas and may be mixed with extra liquid to aid in administration via an enteral feeding device. This study compared changes in viscosity of commercially available BTF s when stirred, shaken, or blenderized. The International Dysphagia Diet Standardisation Initiative flow test was used to provide an objective level of viscosity. Our results indicate that the method chosen to thin BTFs results in significant differences in viscosity and varies depending on the percent of water by volume added to the formula as well as the presence of additional non-food ingredients such as synthetic supplements. We conclude that the method used to thin BTFs should be taken into account when a consistent viscosity level is desired.