Muscle power after glucose-potassium loading in undernourished patients

Area of Science:

• Clinical Nutrition
• Skeletal Muscle Physiology
• Surgical Patient Care

Background:

• Undernourished patients exhibit depressed skeletal muscle performance.
• Preoperative nutritional status significantly impacts surgical outcomes.
• Adductor pollicis muscle function is a potential indicator of overall muscle health.

Purpose of the Study:

• To evaluate the effect of intravenous glucose-potassium loading on skeletal muscle performance in undernourished surgical patients.
• To assess the impact of nutritional repletion on muscle glycogen and respiratory exchange ratios.
• To determine the efficacy of energy-electrolyte therapy in preoperative nutritional rehabilitation.

Main Methods:

• Measurement of force-frequency characteristics and maximal relaxation rate of the adductor pollicis muscle.
• Intravenous administration of glucose (104.5 kJ/kg/24 h) and potassium (20 mmol/500 ml glucose) over 48 hours.
• Comparison of muscle performance data with healthy volunteers and pre-treatment measurements.

Main Results:

• Skeletal muscle performance, initially depressed, significantly improved after glucose-potassium loading.
• Muscle glycogen levels were restored, and respiratory exchange ratios returned towards unity.
• Enhanced muscle function suggests a positive response to energy-electrolyte repletion.

Conclusions:

• Intravenous glucose-potassium loading effectively improves skeletal muscle performance in undernourished patients.
• Energy-electrolyte repletion can be a cost-effective strategy for preoperative nutritional rehabilitation.
• Restored muscle power may indicate readiness for major surgery in undernourished individuals.