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ICSE Class 9 Answered

Why do the doctors administer saline only, but not the distilled water 
Asked by dasarinrao1412 | 26 Sep, 2022, 18:26: PM
answered-by-expert Expert Answer
  • Saline is administered instead of distilled water because water is hypotonic relative to the contents of the blood and it may cause the cells to burst.
  • Distilled water causes cells to lyse, so injecting distilled water into a vein will cause some degree of haemolysis. 
  • Haemolysis is the rupture of red blood cells.  Large amount of distilled water would cause much more damage not just limited to haemolysis and but can also cause brain damage or cardiac arrest and death. 
  • That is why fluids such as saline are administered to patients. Saline due the presence of salts is hypertonic relative to the contents of blood.
Answered by Sheetal Kolte | 27 Sep, 2022, 13:36: PM

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