Dehydration Prevention and Management Protocol

Dehydration occurs when your body loses more fluid than it takes in. Water is essential for nearly every body function - temperature regulation, nutrient transport, waste removal, joint lubrication, and cellular processes. Even mild dehydration (1-2% body weight loss) impairs physical and cognitive performance. Symptoms progress from thirst, dark urine, and fatigue to dizziness, confusion, rapid heartbeat, and in severe cases, life-threatening complications.

COMMON CAUSES:

•Inadequate fluid intake (most common)

•Exercise/heat exposure (sweating)

•Illness (vomiting, diarrhea, fever)

•Medical conditions (diabetes, kidney disease)

•Medications (diuretics)

•Alcohol consumption

•High altitude

WHEN TO SEEK MEDICAL CARE: Severe dehydration is a medical emergency. Get help immediately if: unable to keep fluids down for 24+ hours, bloody/black stool, no urination for 8+ hours, confusion or lethargy, sunken eyes, very rapid heart rate, infant with no tears/wet diapers.

REHYDRATION BASICS: Plain water is fine for mild dehydration from inadequate intake. But for dehydration from sweating, illness, or moderate-severe cases, electrolytes are essential - especially sodium. The WHO's oral rehydration solution (ORS) has saved millions of lives from diarrheal diseases by using the sodium-glucose cotransport mechanism to maximize water absorption.

* Electrolyte blends (sodium, potassium, magnesium) replace what's lost and help the body retain fluids properly.

* Glucose (small amount, 2-3%) enhances sodium and water absorption through a specific transport mechanism.

* Zinc is WHO-recommended for children with diarrheal illness to reduce duration and severity.

* Coconut water is a natural source of electrolytes for mild rehydration.

DAILY HYDRATION: General guideline is 2-3 liters daily for adults, more with exercise, heat, or illness. Urine color is a good indicator - aim for pale yellow.

Expected effects: Proper rehydration should show improvement within hours - increased urination, improved energy, normalized heart rate. Severe dehydration may require IV fluids.

Clinical Perspective

Dehydration: body water deficit. Classification by body weight loss: Mild (3-5%), Moderate (6-9%), Severe (≥10%). Classification by tonicity: Isotonic (most common - proportional sodium/water loss), Hypertonic (water loss > sodium - hypernatremia), Hypotonic (sodium loss > water - hyponatremia). Assessment: skin turgor, mucous membranes, capillary refill, heart rate, blood pressure, urine output, mental status.

Clinical approach: 1) Assess severity and type; 2) Identify and treat underlying cause; 3) Replace deficit + ongoing losses + maintenance; 4) Monitor response. Mild-moderate: oral rehydration preferred. Severe or unable to tolerate oral: IV fluids (NS or LR). Diarrheal disease: WHO low-osmolarity ORS (245 mOsm/L) most effective. Exercise-associated: sodium-containing fluids; plain water can cause dilutional hyponatremia with excessive intake.

* Electrolyte Blend/ORS (A-grade): Foundation of treatment. WHO guidelines: (PMID: 16625635). Cochrane review: (PMID: 19630960). ORS composition: Na 75 mEq/L, K 20 mEq/L, glucose 75 mmol/L, osmolarity 245 mOsm/L.

* Sodium (A-grade): Primary electrolyte; drives fluid retention. Review: exercise (PMID: 17277604). Systematic review: athletes (PMID: 25979840). 300-600mg/L for exercise; higher for salty sweaters.

* Potassium (A-grade): Intracellular fluid balance. Review: ORS (PMID: 17277604). 100-200mg/L or as part of ORS.

* Magnesium (B-grade): Lost in sweat; prevents cramps. Systematic review: (PMID: 28150472). 50-100mg/L or 300-400mg daily.

* Zinc (A-grade): WHO-recommended for pediatric diarrhea. Cochrane review: (PMID: 18279051). 10-20mg daily during illness.

* Glucose (A-grade): Sodium-glucose cotransport enhances absorption. Physiology: (PMID: 16625635). 2-3% solution optimal.

* Coconut Water (B-grade): Natural electrolytes. Comparison study: (PMID: 22257640). 500ml-1L.

* B-Complex (C-grade): Water-soluble; lost in urine/sweat. Review: (PMID: 20200808). Daily.

Assessment targets: Body weight changes, urine specific gravity (1.010-1.025 normal), urine color, serum sodium, BUN/creatinine ratio, vital signs.

Protocol notes: Oral vs IV: oral preferred if tolerated - more physiological, safer, cheaper; IV for severe dehydration, shock, intractable vomiting. Exercise-associated hyponatremia (EAH): from drinking too much plain water during prolonged exercise - presents similar to dehydration but treatment is fluid restriction, not more fluids. Sports drinks: adequate for mild exercise losses but often hyperosmolar with too much sugar; dilute 1:1 with water for better absorption. Homemade ORS: 1L water + 6 tsp sugar + 1/2 tsp salt (less precise but emergency option). Elderly: reduced thirst sensation; higher dehydration risk; often present atypically. Children: higher body water percentage; faster dehydration progression; use weight-based replacement. Fever: increases fluid needs ~100-150ml per degree C above normal. High altitude: increased respiratory water loss + diuresis; increased fluid needs. Alcohol: diuretic effect + impaired thirst; encourage water alongside. Caffeine: mild diuretic effect at high doses; moderate intake doesn't significantly impact hydration. IV fluid selection: isotonic dehydration - NS or LR; hypernatremic - slow correction with hypotonic fluids to avoid cerebral edema; hyponatremic - depends on acuity and symptoms. Monitoring: daily weights, strict I/O, electrolytes q6-12h initially for severe cases.

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