Comprehensive Clinical Manual on Renal Replacement Therapy: Prescription, Management, and Complications across Adult, Pediatric, and Neonatal Populations
Renal replacement therapy serves as a vital intervention for adult, pediatric, and neonatal patients experiencing advanced acute kidney injury or end-stage kidney disease. Selecting between hemodialysis and peritoneal dialysis requires an assessment of patient size, vascular infrastructure, cardiovascular tolerance, and family care capabilities. Long-term treatment success depends on precise, age-specific prescription formulas, strict metabolic and growth tracking, and proactive management of infectious and mechanical complications.
1. Definition and Core Modalities
Renal Replacement Therapy (RRT) encompasses extracorporeal or intracorporeal techniques that substitute for the filtration, metabolic, and fluid-regulatory functions of failing kidneys.
- Hemodialysis (HD): An extracorporeal process where blood is pumped through a synthetic dialyzer containing thousands of semipermeable hollow fibers. Solute removal occurs via diffusion (driven by concentration gradients) and convection (driven by hydrostatic pressure), while ultrafiltration removes fluid excess.
- Peritoneal Dialysis (PD): An intracorporeal process utilizing the patient's biological peritoneal membrane as the dialyzer. A sterile, hypertonic glucose or icodextrin solution is instilled into the peritoneal cavity. Solutes diffuse down concentration gradients into the dialysate, and osmotic or oncotic gradients drive fluid ultrafiltration.
2. Clinical Indications for Initiation
Indications vary significantly based on patient age, metabolic rate, and underlying etiology.
Adult Indications
Guided by the classic AEIOU mnemonic, typically when GFR falls below 15 mL/min/1.73m² alongside clinical symptoms:
A - Acidosis: Refractory metabolic acidosis (pH < 7.20) unresponsive to bicarbonate therapy.
E - Electrolyte Imbalance: Refractory hyperkalemia (K⁺ > 6.5 mEq/L) or rapidly rising values with ECG changes.
I - Ingestions: Toxic levels of dialyzable substances (e.g., lithium, salicylates,…
Reviewed by the LibraryMedicine.com Clinical Editorial Board. Our authors are practicing physicians and medical educators dedicated to delivering evidence-based, up-to-date clinical guides.
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