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Dehydration

Diagnosis

  1. Degree sunken eye retention or haematocrit    fluid req. ml./kg. B/W.
  2. % skin bold/sic value
  3. 4-8 mild not sunken 40-45 15-25
  4. 6-8 moderate barely visible 2-4 50 30-50
  5. 10-12 shock prominent 20-45 60 80-150

Isotonic dehydration

Loss of water in an iso-osmolarity reduced extra cellular fluid (ECB)only

Hypotonic dehydration 

(sodium depletion) Loss of salt in excess of water severe dehydration & hyponatraemia

Diagnosis

  • Low come of plasma Na + & cl-
  • Rigidity, fatigue

Rx

  • 0.9 Na cl parenterally => moderate
  • 5% Na cl => marked dehydration

Hypertonic dehydration (water depletion)

  • Deprivation of water without Na+ loss
  • Inc. plasma Na+ above 160 m eq

RX   

  • I/v injection of electrolyte free water 5% glucose or
  • Saline or ringer’s solution

Symptom

Thirst, sunken eye ball, Parched mucus membrane

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