Planes de Rehidratación en Pediatría

Understanding Pediatric Rehydration Plans

Definition and Causes of Dehydration

• Dehydration is a pathological state characterized by a decrease in body water or fluids due to low intake or high output.

• It can be accompanied by an electrolyte disorder, although this is not common. Common causes include vomiting, diarrhea, fever, and excessive diuresis.

Classification of Dehydration

• Dehydration is classified into three grades:

• Grade 1 (mild)

• Grade 2 (moderate)

• Grade 3 (severe)

• Each grade has specific physical examination findings that help in classification. For instance, dry oral mucosa indicates at least grade 1 dehydration.

Indications for Electrolyte Testing

• Specific indications for serum electrolytes include:

• Severe dehydration (grade 3).

• Patients with severe malnutrition or those not responding to parenteral fluids.

• A discrepancy between reported symptoms and physical examination findings may also necessitate testing.

Initial Management Plans Based on Dehydration Severity

• For patients without dehydration but at risk, a supervised plan will be implemented.

• Mild dehydration (grade 1) requires Plan B; moderate (grade 2) may require Plan B or C; severe dehydration always necessitates Plan C.

Specific Guidelines for Parenteral Hydration

• Parenteral hydration is indicated for:

• Altered consciousness in grade 3 dehydration.

• High-output diarrhea defined as over ten mL/kg/hour.

• Other indicators include persistent vomiting and inability to take oral fluids effectively. Patients under four months old or weighing less than four kilograms are also prioritized for parenteral hydration plans.

Overview of Rehydration Plans

• The rehydration plans consist of:

• Plan A: Home management for non-dehydrated patients experiencing diarrhea/vomiting.

• Plan A Supervised: Continuous observation with oral rehydration salts administered at a rate of 10–20 mL/kg over two hours.

• Plan B: Use of oral rehydration salts based on severity.

• Plan C: Intravenous fluids when necessary due to severe conditions like shock or high-output diarrhea.

Dietary Recommendations During Rehydration

• In cases of diarrhea, special dietary measures should be taken while avoiding acidic foods that could exacerbate the condition.

• Parents should be educated about warning signs and preventive hygiene measures to avoid future infections during treatment sessions.

Hydration Management in Patients

Initial Assessment and Plan

• The patient will be sent home with a hydration plan; if no improvement is observed, the degree of dehydration will be reassessed to determine necessary actions.

Oral Rehydration Strategy

• Plan B involves administering oral rehydration salts (ORS) at a rate of 60-100 mL/kg over the first four hours. If vomiting occurs, wait 10 minutes before re-administering ORS more slowly.

Evaluation After Four Hours

• After four hours, three scenarios are possible:

• If improved and hydrated, send home with a plan.

• If improved but still dehydrated, continue Plan B for two more hours.

• If no improvement, transition to Plan C.

Composition of Oral Rehydration Solutions

• The most effective ORS is solution 75 due to its high glucose and sodium content; however, solutions 60 or 45 may be better accepted by pediatric patients due to their sweeter taste.

Administration Techniques

• Two administration schemes exist:

• Rapid Scheme: For patients under 12 months, administer 30 mL/kg in the first hour followed by 70 mL/kg over five hours. For those over two months, give the initial dose within the first half-hour and follow up with remaining fluids over a shorter duration.

Monitoring Hydration Status

• Once intravenous fluids begin, monitor every 30 minutes. If no improvement is noted after administering the total required volume (100 mL/kg), adjust infusion speed based on hydration status.

Phases of Fluid Resuscitation

• The resuscitation process consists of three phases:

• Phase One: Vascular perfusion restoration through bolus doses (20 mL/kg).

• Phase Two: Correcting water deficits in intracellular and extracellular compartments.

• Phase Three: Replacing current losses from vomiting or diarrhea as they occur.

Bolus Administration Guidelines

• Administer boluses based on patient condition; critical patients may receive boluses every five minutes while stable ones can have longer intervals. Prefer lactated Ringer's solution over normal saline during this phase.

Calculating Fluid Needs Based on Dehydration Level

• Calculate fluid needs based on dehydration severity:

• For children under one year with severe dehydration:

• Grade I = loss of ~50 mL/kg/24h,

• Grade II = ~100 mL/kg,

• Grade III = ~150 mL/kg.

• For older children (>12 months), calculations shift to body surface area rather than weight.

This structured approach ensures clarity in managing hydration effectively across different patient scenarios.

Hydration Guidelines for Pediatric Patients

Basal Fluid Requirements

• The basal fluid requirement is 100 cc per kilogram every 24 hours. For patients weighing between 10 and 20 kilograms, the total becomes 1000 cc plus an additional 50 cc for each kilogram over 10.

• For patients weighing between 20 and 40 kilograms, the requirement increases to 1500 cc per kilogram every 24 hours, with an extra 20 cc for each kilogram above 20.

Calculating Total Fluid Needs

• The total fluid administered to a patient is calculated by adding the deficit to the basal needs and subtracting initial boluses only in cases of severe dehydration.

• This total is then divided into two parts: 50% given in the first eight hours and the remaining 50% over the next sixteen hours.

Solution Selection Based on Symptoms

• If a patient presents with diarrhea, it is recommended to administer Ringer's lactate; if vomiting occurs, normal saline is preferred.

• In phase one of treatment, regardless of age, Ringer's solution or a saline solution (0.9%) should be used. However, Ringer's lactate is generally preferred.

Variations in Treatment for Different Age Groups

• For infants and school-aged children in phase two, a mixture of dextrose at 5% in distilled water combined with sodium chloride (80 mEq) and potassium chloride (20 mEq) is suggested.

• School-aged patients may receive a mix of Ringer's lactate plus potassium chloride (20 mEq), while adolescents typically use only Ringer's lactate during phase two.

Special Considerations for Rehydration

• Dextrose solutions have shown effective results for rehydration in pediatrics; special considerations are necessary when there’s no external glucose source available.

• Continuous monitoring of fluid balance is crucial due to risks associated with inadequate secretion of hormones like ADH. Hypotonic solutions are not recommended as primary options.

Case Studies and Practical Application

• The speaker invites viewers to engage through comments or direct messages regarding case studies related to hydration plans based on dehydration severity.

• Viewers are encouraged to participate in exercises calculating liquid requirements based on specific patient scenarios presented throughout the discussion.