Related Experiment Video

Updated: Aug 9, 2026

A Neonatal BALB/c Mouse Model of Necrotizing Enterocolitis
05:39

A Neonatal BALB/c Mouse Model of Necrotizing Enterocolitis

Published on: November 30, 2021

Fecal sodium and potassium losses in low birth weight infants

R P Verma1, E John, L Fornell

  • 1Department of Pediatrics, Hahnemann University Hospital, Philadelphia, PA 19102.

Indian Journal of Pediatrics
|September 1, 1993
PubMed

Insights

Preterm neonates exhibit higher fecal potassium losses compared to term infants, contributing to electrolyte imbalances. Sodium losses in preterm infants were similar to term infants, except for lower sodium per gram of stool.

Area of Science:

  • Neonatal Physiology
  • Pediatric Gastroenterology
  • Clinical Nutrition

Background:

  • Electrolyte imbalances, particularly sodium and potassium, are common in preterm neonates.
  • Fecal losses represent a potential, yet understudied, route of electrolyte imbalance in this population.
  • Understanding these losses is crucial for optimizing fluid and electrolyte management in vulnerable infants.

Purpose of the Study:

  • To quantify 24-hour fecal sodium (Na) and potassium (K) losses in preterm neonates during the early postnatal period.
  • To compare fecal electrolyte losses between unfed extremely low birth weight infants, fed preterm infants, and fed term infants.
  • To elucidate the contribution of fecal excretion to electrolyte disturbances in preterm infants.

Main Methods:

  • Measurement of 24-hour fecal volume and total electrolyte content (Na and K).
  • Calculation of fecal electrolyte losses per kilogram of body weight, per gram of stool, and as a percentage of intake.
  • Comparison of these variables across three groups: unfed extremely low birth weight infants, fed preterm infants, and fed term infants.

Main Results:

  • Fecal Na losses did not differ between unfed and fed preterm infants but were significantly lower than in term infants.
  • Fecal K loss per gram of stool was significantly higher in the extremely low birth weight preterm group compared to both fed preterm and term infants.
  • Fecal K/Na ratio was highest in the extremely low birth weight preterm group and decreased with increasing gestational age.

Conclusions:

  • Preterm neonates, especially those extremely preterm, experience higher relative fecal potassium losses, potentially exacerbating hyperkalemia risk.
  • Fecal sodium losses are not a primary driver of differences between preterm and term infants, though lower per gram of stool in preterm infants.
  • These findings highlight the importance of considering fecal electrolyte losses in the management of preterm infants and warrant further investigation into factors influencing these losses.

More Related Videos

Effect of Hyaluronic Acid 35 kDa on an In Vitro Model of Preterm Small Intestinal Injury and Healing Using Enteroid-Derived Monolayers09:36

Effect of Hyaluronic Acid 35 kDa on an In Vitro Model of Preterm Small Intestinal Injury and Healing Using Enteroid-Derived Monolayers

Published on: July 28, 2022

Ear Plaster Therapy as a Safe and Effective Treatment for Gestational Vomiting05:33

Ear Plaster Therapy as a Safe and Effective Treatment for Gestational Vomiting

Published on: August 4, 2023

Related Concept Videos

Antihypertensive Drugs: Potassium-Sparing Diuretics01:28

Antihypertensive Drugs: Potassium-Sparing Diuretics

Liddle syndrome is a genetically inherited form of hypertension characterized by the overactivity of epithelial sodium channels in the nephron, the functional unit of the kidney. This heightened activity leads to increased sodium reabsorption and excessive excretion of potassium. To counteract this, potassium-sparing diuretics such as amiloride are used. They function by blocking these sodium channels, thereby reducing the influx of sodium into the epithelial cells and minimizing the loss of...
Reabsorption and Secretion in the Loop of Henle01:17

Reabsorption and Secretion in the Loop of Henle

The thick ascending limb of the nephron loop has Na+–K+–2Cl− symporters in the apical membranes of its cells. These symporters simultaneously reclaim one sodium ion, one potassium ion, and two chloride ions from the tubular fluid. Sodium ions are actively transported into the interstitial fluid at the base and sides of the cell, diffusing into the vasa recta. Chloride ions move through leakage channels in the basolateral membrane into the interstitial fluid and then into the vasa recta.
Roles of Electrolytes: Sodium and Potassium01:24

Roles of Electrolytes: Sodium and Potassium

Sodium plays a crucial role in maintaining fluid and electrolyte balance and overall bodily homeostasis. Sodium balance is primarily regulated by kidney function, which adjusts sodium elimination to match dietary intake and maintain proper electrolyte levels. Sodium is the most abundant cation in the extracellular fluid (ECF) and is found in salts such as sodium chloride (NaCl) and sodium bicarbonate (NaHCO3). Although cellular plasma membranes are relatively impermeable to sodium, its role in...
Pharmacokinetics in Pediatric Patients: Drug Excretion01:26

Pharmacokinetics in Pediatric Patients: Drug Excretion

In pediatric medicine, understanding the renal function and drug elimination nuances is crucial for administering safe and effective treatments. Newborns, in particular, display markedly slower renal functions than adults, profoundly affecting how drugs are cleared from their bodies. This slower drug clearance requires clinicians to extend the dosing intervals for many medications to prevent drug accumulation and toxicity while ensuring therapeutic efficacy.One key area where these adjustments...
Physiology of the Genitourinary System II: Tubular Reabsorption and Secretion01:22

Physiology of the Genitourinary System II: Tubular Reabsorption and Secretion

The kidneys maintain homeostasis through filtration, reabsorption, and secretion. Tubular reabsorption and secretion are crucial in forming urine and regulating electrolytes, water balance, and waste elimination.Tubular Reabsorption and Secretion ProcessesTubular reabsorption is the process that reclaims essential substances such as electrolytes, glucose, amino acids, and water from the glomerular filtrate back into the bloodstream. This is achieved through passive and active transport...
Acute Kidney Injury V: Interprofessional Care01:20

Acute Kidney Injury V: Interprofessional Care

Acute Kidney Injury (AKI) requires a collaborative healthcare approach to restore renal function and prevent complications. Essential management strategies involve monitoring fluid and electrolyte balance, adjusting medications, initiating dialysis when necessary, and providing nutritional support.Fluid and Electrolyte ManagementFluid Monitoring: Regularly monitoring body weight, central venous pressure, and urine output helps detect fluid imbalances early. Patient intake and output are...