IDDSI Flow Test; Testing Tips; First Translations
April 2017
  • How to "Go with the IDDSI Flow Test"
  • First Translation Drafts on the IDDSI Website
  • Support for IDDSI
  • IDDSI on the Move
How to "Go with the IDDSI Flow Test"

The IDDSI flow test is a simple, inexpensive method developed by Dr. Ben Hanson and the IDDSI board members, to accurately and reliably determine the thickness level of liquids used for helping individuals with dysphagia.  In order to obtain accurate results the correct type of 10 ml syringe must be used.  

The flow test is designed to measure the flow of liquids to accurately identify the thickness level of the liquid based on what fluid is left in the 10 ml syringe after 10 seconds.  The test works best for IDDSI Levels 0-3.   

Since level 4 liquids do not flow, it is more appropriate, convenient and accurate to use the fork-drip and spoon-tilt tests in order to identify whether a product is level 4. These testing methods were outlined in the original framework documents.  

All 10 ml syringes are not created equal!

The dimensions of 10 ml syringes differs between manufacturers around the world, therefore IDDSI has specified the exact dimensions and features of the 10 ml syringe that must be used in order to obtain an accurate result. 

Before using the syringe, check the nozzle is clear and free from any plastic residue or manufacturing defects which very occasionally occur. (See image at right).

To check this, run 10 mls of regular water through the syringe.  It should take about 7 seconds for it to completely run through.

Testing Tips:

  • When using commercial thickener products, follow the manufacturer’s instructions and mix thoroughly, watching closely that there are no lumps present.  Be sure to allow the recommended time for the fluid to thicken completely.
  • Use a clean, dry syringe of the correct type each time you test.
  • Use the appropriate recommended IDDSI testing method to check liquid levels

IDDSI flow test for Level 0-3

IDDSI Fork drip and/or Spoon Tilt test for Level 4. 

First Translation Drafts on IDDSI Website

The first two translations of the IDDSI framework and accompanying documents are now up on the IDDSI website.   The French and French Canada drafts will be posted for feedback and comments until June 1, 2017.  We invite our global community to provide feedback on these documents here.  Once finalized the documents will be fully available on our website.  Our sincere thanks to the teams who have been working so hard on these.  

Interested in providing a translation? Contact us at

Support for IDDSI
The following organizations have recently indicated their support for IDDSI:
  • Academy of Nutrition and Dietetics (AND) and the American Speech-Language-Hearing Association (ASHA)
  • Canadian Association of Occupational Therapists. 
IDDSI on the move
Recent, current and upcoming IDDSI-related presentations:
  • March 1 - 4, 2017: Dysphagia Research Society Annual Meeting, Portland, OR, USA
  • March 7, 2017: Complete Purchasing Services Professional Development Event, Mississauga, ON, Canada
  • March 8, 2017: Canadian Industry Partner Forum, Mississauga, ON, Canada
  • March 13-19, 2017: Nutrition & Hydration Week, Global
  • April 4-5, 2017: Senior Living Culinary and Nutrition Summit at TWC 2017,Toronto, ON, Canada
  • May 3, 2017, Sysco Regional Healthcare Show, Vaughan, ON, Canada
  • May 4, 2017, Complete Purchasing Services Professional Development Event, Ottawa, ON, Canada
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