Sterile water is used during laparotomy procedures because of its isotonic properties.

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Normal saline solution,not sterile water,should be used in abdominal procedures to moisten laparotomy sponges.Normal saline is an isotonic solution and has the same osmotic pressure as blood serum and interstitial fluid.It will not alter sodium,chloride,or fluid balance because it does not cross cell membranes.(Hypotonic solutions cause cells to swell;hypertonic solutions cause them to shrink. )

Sterile Water Is Used During Laparotomy Procedures Because of Its