Compare Oral to Intravenous Rehydration for Severedly Malnourished Children in Resource Limited Settings
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Reviewed by Dat Tien Nguyen, B.A, ScM.
Translated by Nhi Phuong Quynh Le, B.A |
Posted on October 20th, 2025
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For children hospitalized with severe malnutrition, rehydration therapy is often indicated. Oral rehydration is traditionally preferred over intravenous administration due to concerns that malnourished children may have compromised cardiac function, which could be further stressed by fluid overload. However, this recommendation is based on limited evidence from decades-old studies. To address this knowledge gap, the Joint Global Health Trials organization funded a study to evaluate the safety and effectiveness of intravenous rehydration in children with severe malnutrition.
The study was conducted across four African countries and enrolled 272 children with a median age of approximately 13 months. All participants were hospitalized for severe acute malnutrition, determined by weight-for-height z-scores, mid-upper-arm circumference measurements, and the presence of edema. Each child also presented with gastroenteritis, characterized by more than three loose stools per day. Participants were randomly assigned to receive either oral or intravenous rehydration, with each group further divided into fast or slow infusion protocols. Oral rehydration consisted of administering 5–10 mL of fluid per kilogram of body weight every 30–60 minutes. Rapid intravenous rehydration involved the infusion of 100 mL of lactated Ringer’s solution per kilogram over 3–6 hours, while the slow protocol extended the same volume over 8 hours.
At follow-up assessments conducted 3 and 28 days after treatment initiation, there was no significant difference in mortality between the oral and intravenous groups. However, intravenous rehydration was associated with a greater improvement in sodium levels, with an average increase of 8.2 mmol/L compared to 4.4 mmol/L in the oral rehydration group. The researchers noted that in real-world, low-resource settings, close monitoring is often infeasible, suggesting that the observed effectiveness of oral rehydration in the study may overestimate its practical performance. Given the absence of major adverse effects, intravenous rehydration may be a viable and safe option in resource-limited healthcare environments.
The study was conducted across four African countries and enrolled 272 children with a median age of approximately 13 months. All participants were hospitalized for severe acute malnutrition, determined by weight-for-height z-scores, mid-upper-arm circumference measurements, and the presence of edema. Each child also presented with gastroenteritis, characterized by more than three loose stools per day. Participants were randomly assigned to receive either oral or intravenous rehydration, with each group further divided into fast or slow infusion protocols. Oral rehydration consisted of administering 5–10 mL of fluid per kilogram of body weight every 30–60 minutes. Rapid intravenous rehydration involved the infusion of 100 mL of lactated Ringer’s solution per kilogram over 3–6 hours, while the slow protocol extended the same volume over 8 hours.
At follow-up assessments conducted 3 and 28 days after treatment initiation, there was no significant difference in mortality between the oral and intravenous groups. However, intravenous rehydration was associated with a greater improvement in sodium levels, with an average increase of 8.2 mmol/L compared to 4.4 mmol/L in the oral rehydration group. The researchers noted that in real-world, low-resource settings, close monitoring is often infeasible, suggesting that the observed effectiveness of oral rehydration in the study may overestimate its practical performance. Given the absence of major adverse effects, intravenous rehydration may be a viable and safe option in resource-limited healthcare environments.