Thickened fluids

Short description: Beverage for those with difficulty swallowing

Thickened fluids and thickened drinks are often used for people with dysphagia, a disorder of swallowing function.[1] The thicker consistency makes it less likely that individuals will aspirate while they are drinking. Individuals with difficulty swallowing may find that liquids cause coughing, spluttering, or even aspiration, and that thickening drinks enables them to swallow safely. Patients may be advised to consume thickened liquids after being extubated.

Liquid thickness may be measured by two methods, with a viscometer or by line spread test.

## Contents

* 1 Thickening amount
* 2 Thickening agents
* 3 Medical value
* 4 See also
* 5 References

## Thickening amount

There are several levels of consistency/viscosity and these have historically varied by country, although the launch of the International Dysphagia Diet Standardisation Initiative (IDDSI)[2] aims to remove this variation. According to the IDDSI, the thickness of a drink can be tested by measuring the amount that pours out of a 10ml syringe in 10 seconds.[3]

* 0 – Thin liquids: Unthickened, such as water or juice. Common thin liquids include coffee, tea, clear broth, clear juice, skim milk, 2% milk, and whole milk.
* 1 – Slightly thick (between 9 and 6 ml pour out of a 10ml syringe in 10 seconds)
* 2 – Mildly thick (between 6 and 2 ml pour out)
* 3 – Moderately thick (2 or less ml pour out)
* 4 – Extremely thick – drinks of this stage should require a spoon to drink and are comparable to pureed foods.

Patients who have a restriction on thin liquids should avoid milk shakes, ice cream, popsicles, and Jell-O, as these melt into thin liquids in the mouth.

## Thickening agents

There are multiple commercial thickeners on the market for thickening liquids. Vendors also offer pre-thickened liquids such as water, juice, and milk in individual serving sized cartons. Some commercial thickeners use modified maize starch, which helps support hydration and nutritional levels, while others use xanthan gum.

## Medical value

There is no good evidence that thickening liquids reduces pneumonia in dysphagia (swallowing problems) and it may be associated with poorer hydration and with an adverse effect on quality of life.[4][5] Thicker consistencies may also be associated with pharyngeal residue and perhaps with an increased risk of severe pneumonia if aspirated.[6][7] Concern has been expressed that patients receiving modified texture diets, such as thickened liquids are not receiving adequate information about the pros and cons and are not as result giving valid informed consent.[8]

## See also

* Consistometer

## References

1. ↑ "Dysphagia: current reality and scope of the problem" (in En). Nature Reviews. Gastroenterology & Hepatology 12 (5): 259–70. May 2015. doi:10.1038/nrgastro.2015.49. PMID 25850008.
2. ↑ "IDDSI – Home". https://iddsi.org/. Retrieved 15 January 2024.
3. ↑ "IDDSI flow test". IDDSI. http://iddsi.org/wp-content/uploads/2017/07/IDDSI-Print-Post-Poster-2-Flow-Test-July-2017.pdf.
4. ↑ "Use of modified diets to prevent aspiration in oropharyngeal dysphagia: is current practice justified?" (in En). BMC Geriatrics 18 (1): 167. July 2018. doi:10.1186/s12877-018-0839-7. PMID 30029632.
5. ↑ Makhnevich, Alexander; Perrin, Alexandra; Talukder, Dristi; Liu, Yan; Izard, Stephanie; Chiuzan, Codruta; D'Angelo, Stefani; Affoo, Rebecca et al. (1 July 2024). "Thick Liquids and Clinical Outcomes in Hospitalized Patients With Alzheimer Disease and Related Dementias and Dysphagia". JAMA Internal Medicine 184 (7): 778–785. doi:10.1001/jamainternmed.2024.0736. ISSN 2168-6114. PMID 38709510.
6. ↑ "The influence of food texture and liquid consistency modification on swallowing physiology and function: a systematic review". Dysphagia 30 (1): 2–26. February 2015. doi:10.1007/s00455-014-9578-x. PMID 25343878.
7. ↑ Robbins, JoAnne (April 2008). "Comparison of 2 Interventions for Liquid Aspiration on Pneumonia Incidence". Annals of Internal Medicine 148 (7): 509–18. doi:10.7326/0003-4819-148-7-200804010-00007. PMID 18378947.
8. ↑ O’Keeffe, S.T., Leslie, P., Lazenby-Paterson, T. et al. Informed or misinformed consent and use of modified texture diets in dysphagia. BMC Med Ethics 24, 7 (2023). https://doi.org/10.1186/s12910-023-00885-1

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