Effects of kwashiorkor malnutrition on measured capillary filtration rate in forearm

Area of Science:

• Pediatric Nutrition
• Cardiovascular Physiology
• Malnutrition Research

Background:

• Kwashiorkor is a severe form of malnutrition characterized by edema.
• Understanding its impact on fluid exchange is crucial for treatment.
• Previous research has not fully elucidated the mechanisms of altered fluid dynamics in kwashiorkor.

Purpose of the Study:

• To investigate the effects of kwashiorkor malnutrition on blood tissue fluid exchange.
• To measure capillary filtration rate (CFR) in children with kwashiorkor.
• To differentiate the effects of kwashiorkor from other conditions like marasmus and non-kwashiorkor edema.

Main Methods:

• Measured forearm capillary filtration rate (CFR) in response to increased venous pressure.
• Compared CFR in kwashiorkor patients (K), recovered patients (RK), marasmus (M), non-kwashiorkor edema (E), and controls (C).
• Assessed forearm cutaneous blood flow using laser Doppler flowmetry (LDF) in control and kwashiorkor groups.

Main Results:

• Capillary filtration rate (CFR) was significantly lower in kwashiorkor patients (K) compared to all other groups (P < 0.05).
• No significant differences in CFR were found between recovered (RK), marasmus (M), edema (E), and control (C) groups.
• Forearm cutaneous blood flow (LDF) was only slightly lower in kwashiorkor patients (K) and showed no correlation with CFR.

Conclusions:

• The reduced CFR in kwashiorkor is reversible and specific to the condition, not solely due to malnutrition or edema.
• Peripheral vasoconstriction does not appear to be the cause of the lower CFR in kwashiorkor.
• Kwashiorkor significantly impairs microvascular fluid exchange, suggesting a specific pathophysiological mechanism.