3. Results The average age of the patients was 57.38±5.9 years old and there was no significant difference between the two groups in this regard (p>0.19); in terms of gender, 55 percent of the samples were male and 45 percent of them were female and there was no significant difference between the two groups in this regard too (p>0.46). Findings showed that 81.4 percent of the patients in the intervention group and 93.3 percent of the patients in the control group were nonsmokers (p=0.09). There was no significant difference between the
two groups in terms of clinical characteristics before intervention. Table 1 indicates that some cases such as the average left ventricular Ejection Fraction (EF), the average of Fraction of Inspiratory oxygen (FIO2), arterial blood pressure mean, the amount of peripheral blood oxygen saturation, heartbeat and respiratory rate were the same in the two groups [table 1]. 15.7 percent of the samples of the control group were suffering from diabetes, but the average of suffering and not suffering from diabetes was the same in the intervention group (p=0.085). Most of the samples in both intervention: 58.30 percent and control: 51.70 percent groups were healthy in terms of suffering from HDL (p=0.46).Respectively 61.7 percent and 51.7 percent of the samples of the intervention and control groups were suffering from hypertension (p=0.35); there was no significant statistical difference in none of the above variables. None of the samples had the history of drug addiction and alcoholism. Most of the samples in the both groups were not suffering from dangerous cardiac dysrhythmia (PVC, AF), (p=0.64, p=0.24). There was no statistical significant difference between the two groups in terms of drainage (p=0.39). The average of surgery duration in the intervention and control groups was respectively 2.56±61.34 and 2.47±55.78 hours, the average length of time that the patient is connected to cardiopulmonary bypass machine in the intervention and control groups was respectively 68.85±18.47 and 67.43±16.70 minutes. The duration average of aortic artery clamping in the intervention and control groups was respectively 44.61±16.50 and 45.46±15.10 minutes. The average of duration of patient’s entry into the ward until the beginning of the intervention in the intervention and control groups was respectively 32.43±1.29 and 42.50±1.30 hours. The average of patient’s stay in the open heart intensive care unit in the intervention and control groups was respectively 42.42±11.13 and 48.05±38.62 hours. There was no significant statistical difference in the two groups regarding the above variables.
Results of the independent t-test showed that duration of weaning from mechanical ventilator was reduced in the intervention group in compare with control group and it was statistically significant (p=0.001) (table 2).