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What is important and best for patient with dophop feeding tube too give free water Every hour 40 ml or every 4 hour 140ml ?? And more specific whats best hourly free water between feeding rate 45-65 ml / hr

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enteral nutrition AND water flush

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ASPEN enteral nutrition water flush hydration adult continuous feeding guidance

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https://aspenjournals.onlinelibrary.wiley.com/doi/pdf/10.117…

For a Dobhoff feeding tube, the “best” free-water schedule depends on the patient’s prescribed daily fluid goal, formula type, urine output, sodium, kidney/heart function, and other IV fluids. Do not choose the schedule based on feeding rate alone.

First, these two options are not equal

  • 40 mL every hour = 960 mL/day
  • 140 mL every 4 hours = 840 mL/day
That is a 120 mL/day difference, before counting water already contained in the tube-feed formula and any medication flushes.

Practical answer

For a stable adult on continuous feeds at 45-65 mL/hr, 140 mL every 4 hours is generally the more practical pattern if that matches the ordered daily free-water target. It provides intermittent flushing, reduces pump/tubing handling, and is commonly compatible with continuous feeding.
40 mL/hr continuously can be appropriate only when a clinician specifically wants a higher, steady water delivery, such as for a defined fluid deficit or hypernatremia. It adds almost 1 liter/day, so it can be too much for someone with:
  • Heart failure or pulmonary edema
  • Kidney failure, oliguria, or dialysis-related fluid restriction
  • Hyponatremia/SIADH
  • Significant edema or a positive fluid balance
ASPEN notes that, for continuous enteral nutrition, small frequent water flushes are preferred in critically ill patients or those at risk of aspiration, but the total water volume must still be individualized. See ASPEN enteral nutrition safety practices.

How to calculate it correctly

  1. Daily fluid requirement: determined by the medical/dietitian team.
  2. Subtract free water in the formula. Formula labels list “% free water” or mL free water per liter.
  3. Subtract IV fluids, oral intake, and medication flush water.
  4. The remainder is the daily water-flush prescription.
At feeding rates of 45-65 mL/hr, the formula volume is:
  • 45 mL/hr = 1,080 mL formula/day
  • 65 mL/hr = 1,560 mL formula/day
The formula itself already provides substantial water, but the exact amount varies widely. A 1.0 kcal/mL formula often contains roughly 80%-85% water, while concentrated 1.5-2.0 kcal/mL formulas provide less. Check the product label rather than assuming.

Bottom line

  • If the order is for about 840 mL/day of extra water, use 140 mL every 4 hours.
  • If the intended order is 960 mL/day, that could be given as 40 mL/hr, but it should be intentional and monitored.
  • Do not automatically use 40 mL/hr simply because feeds are at 45-65 mL/hr.
  • A minimum patency flush is often much smaller than these volumes, so the higher amounts are for hydration, not merely keeping the tube open.
Monitor intake/output, daily weight, edema/lung status, serum sodium, BUN/creatinine, and urine output. If you tell me the formula name, the patient’s fluid restriction or daily fluid goal, and whether they have heart or kidney failure, I can help calculate the exact daily free-water amount.
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