Razi Journal of Medical Sciences

Electrolyte imbalance is one of the important factors in the occurrence of cardiac arrhythmias (9) and in order to prevent the occurrence of these arrhythmias, it is necessary to measure serum electrolytes regularly after the operation and examine the patient for signs of decrease or increase in potassium, sodium and calcium. take (10). In connection with achieving the above goal, the amount of liquid absorption and excretion should be accurately measured and recorded. In order to determine the adequacy of hydration and cardiac output, the central venous pressure, blood pressure, serum electrolytes and, if possible, the patient's weight should be monitored regularly, and the patient should be carefully monitored for signs of hypokalemia, hyperkalemia, hyponatremia (sodium depletion) and hypocalcemia (calcium depletion). be taken care of Any signs or symptoms of dehydration, excess fluid accumulation or electrolyte imbalance should be reported to the doctor immediately (11).

The present study was conducted as a single-blind randomized clinical trial on 60 adult patients who were candidates for coronary artery bypass surgery, who were randomly divided into two groups of 30 people. The objectives and method of the study were explained to the patients and written informed consent was obtained. At the beginning of the study, the amount of sodium, potassium and calcium electrolytes of patients who were to undergo open heart surgery were recorded. All patients were operated on by a cardiac surgeon in Hazrat Fatima Zahra Sari Hospital. Arterial pressure of all patients was controlled through the radial artery and they underwent general anesthesia with the same drugs. And each of them performed their own operation, after the completion of the operation and transfer to the ICU, special checklists containing demographic information and electrolyte changes were completed. The desired electrolytes were measured and noted on the day after surgery and the day of discharge from ICU. Finally, after data collection, the information was analyzed using SPSS 21 statistical software and descriptive statistics (mean and standard deviation) and inferential statistics (independent t test and one-way analysis of variance).

3.Results

Based on the results of the present study, the level of sodium and potassium in the two groups is different only one day after surgery, and there is a statistically significant difference; Sodium and potassium levels were higher in the hypothermic group than in the northermic group one day after surgery. These values ​​are not significantly different on the day of discharge from ICU and before surgery. The comparison of sodium and potassium levels by groups and by time was significant only in the hypothermic group, which increased and then decreased on the day after the operation. There was no significant difference in the level of calcium in the two groups; However, the comparison of calcium level by groups and by time showed that this value has a significant difference in both groups, in such a way that the calcium level was higher one day before surgery than the other two times.