Alternative Haemodiafiltration in Summer Season for Chronic Kidney Disease Patients

Overview

Hemodiafiltration is a renal replacement technique combining diffusion and convection to enhance solute removal. Post dialyser replacement fluid is administered to achieve the target fluid balance. The skin is the largest human organ playing an important role in thermal and Na regulation and skin blood flow is 8.5-10%of cardiac output .

Sweat contains electrolytes, creatinine and urea, with higher excretion by mild physical exercise. These findings motivate studies investigating the effect of stimulated sweating on volume control in kidney disease patients. Using sweat as the vehicle for removing molecules normally excreted in the urine was identified some decades ago. sweat urea concentration could reach 5.5 to 50 times the serum concentration . Physical inactivity was reported as the fourth leading cause of death from chronic disease worldwide. Warm water immersion (37-46◦C) increases limb blood flow, and muscle heating activates regulators of mitochondrial biogenesis. water immersion represent diffusion .the average person sweats between (0.8- 1.4) liters during an hour of exercise, drinking water represent water replacement . Particularly, urea concentrations in sweat are persistently elevated in uremic patients. The 24-hour urinary urea excretion in summer was 1/4 the quantity in winter in uremic patients, indicating the compensatory urea excretion in sweat gland fluid . Sweat glands are inactive except above 29°C, due to a concentration gradient within the stratum corneum, results in continuous water convection from within the body through the skin and into the environment. In our study we stimulate sweating of chronic kidney disease patients through mild physical activity as walking then they immersied in water to enhance waste excretion through skin.Evaluation of these patients will be done through following up blood pressure,laboratory investigations as kidney function test sodium, potassium,phosphorus levels and uric acid.

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