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Influence of sevoflurane and isoflurane anesthesia on early cognitive function after anesthesia in elderly patients with lung cancer |
ZHANG Zhaoxu,ZHAO Ge,and CHEN Qiang. |
Department of Anesthesiology, Shanxi Provincial Corps Hospital of Chinese People’s Armed Police Forces, Taiyuan 030006, China |
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Abstract Objective To compare different impacts of anesthesia on early cognitive function in elderly patients with lung cancer after surgery. Methods 60 cases of elective lung tumor patients (ASA<Ⅲ), 60 to 79 years old, able to effectively communicate with physicians, and MMSE scores> 24 points were recruited. The patients were randomly divided into 2 groups (n=30 each): sevoflurane group (group Ⅰ) and isoflurane group (group Ⅱ). For each group, on preoperative 1 d, leaving the anesthesia recovery room after surgery, 3 and 7 days after surgery. The Mini-mental State Examination (MMSE) was used to score cognitive function.The postoperative determine cognitive dysfunction (POCD) was determined by use of Z-scoring method. For the two groups of patients,on the day before surgery and postoperative 1 h and 1 d, venous blood 5 ml was exampled to do enzyme-linked immunosorbent assay (ELISA) for determining TNF-α and IL-6, in accordance with the instructions of the ELISA kit. Results Compared with preoperative 1 d (group Ⅰ: 28.2±2.2, group Ⅱ: 27.9±1.7), MMSE score decreased (group Ⅰ: 22.7±3.0, group Ⅱ: 21.8±3.2, P<0.05) in group Ⅰ and group Ⅱ when leaving the anesthesia recovery room 1 d after, and incidence of cognitive dysfunction increased (P<0.05). Compared with preoperative scores in group Ⅰ and group Ⅱ, leaving the PACU, MMSE score was lower (Ⅰ: 25.2±2.2, Ⅱ: 24.9±1.9, P<0.05) in postoperative 1 d; and there was no significant difference between the two groups. Although there was a slight decrease in 3 days (Ⅰ: 5, Ⅱ: 5) and 7 days (Ⅰ: 0, Ⅱ: 1) after the operation, compared with the preoperative scores, the difference was not statistically significant (P>0.05). IL-6 and TNF-α levels 1 h and 1 d after surgery were significantly higher than those 1 d before surgery , with statistically significant differences (P<0.05). Conclusions In elderly patients after receiving anesthesia and lung cancer surgery, when leaving recovery room, cognitive function declined at postoperative day 1 , and basically recovered three days to seven days after the operation. There was no difference in the anesthesia between the use of sevoflurane and isoflurane on cognitive dysfunction, which provides a variety of options for clinical senile anesthesia. Excessive lung tumors surgical stimulation and inflammatory cytokines may have impact on postoperative cognitive function.
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Received: 25 January 2013
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