This difference can be as drastic as a less than 1000 kilocalorie daily intake in patients on clear liquid diets that are not supplemented with commercial formulas to greater than 15000 kilocalories intake for patients on a full liquid diet supplemented with commercial formulas. Clinical SignificanceĮven with the concerns associated with modified diets due to poor nutrition, full liquid diets have historically been more likely than clear liquid diets to be supplemented with commercial formulas that provide a higher caloric intake for patients. Finally, full liquid diets can affect a patient's quality of life over time due to patient dissatisfaction with taste when supplemented with nutrients, patient discomfort with the texture of diet lacking solid food, and increased thirst depending on what full liquids the patient receives. Studies have shown that using full thickened liquid diets to take medications can affect the rate of absorption by delaying drug dissolution. The use of certain types of full liquid diets can also affect drug absorption. The use of modified diets, including full thickened liquid diets in long-term care patients, has correlations with higher BUN and creatinine levels as well as higher rates of dehydration over time. For example, in patients with oropharyngeal dysphagia, this type of modified diet can lead to poor nutrition. The use of any modified diet, including a full liquid diet, can be a potential issue for patients if used long-term. Unlike a clear liquid diet, which includes only liquids and semi-liquids that are non-opaque, a full liquid diet is more inclusive, as it allows all types of liquids. A patient prescribed a full liquid diet follows a specific diet type requiring all liquids and semi-liquids but no forms of solid intake.
One step in that progression is a full liquid diet. Dietary restrictions can be as restrictive as no food or liquids allowed by mouth, which may increase in a stepwise fashion until reaching regular nutrition. Patients not ready for a regular diet due to elective or emergent procedures or who experience irregularity in gastrointestinal function, dysphagia, a transition from prolonged fasted periods, etc., are typically placed on a restrictive diet.
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