The Journal of Practical Medicine ›› 2024, Vol. 40 ›› Issue (24): 3521-3526.doi: 10.3969/j.issn.1006-5725.2024.24.014

• Drugs and Clinic Practice • Previous Articles     Next Articles

The effects of different extracorporeal circulation temperature combined with dexmedetomidine on oxidative stress in patients undergoing cardiac surgery under cardiopulmonary bypass

Peng SUN1,Zhaojin JIA1(),Xiuhua LI1,Xiaowei CHEN2,Runsheng WEI2,Yantao JIN3,Jiantao. JIN1   

  1. *.Department of Anesthesiology,Tangshan Workers Hospital,Tangshan 063000,Hebei,China
  • Received:2024-07-15 Online:2024-12-25 Published:2024-12-23
  • Contact: Zhaojin JIA E-mail:32298830@qq.com

Abstract:

Objective To study the effects of different extracorporeal circulation temperature combined with dexmedetomidine on oxidative stress in patients undergoing cardiac surgery under cardiopulmonary bypass. Methods 240 patients who underwent cardiac surgery under cardiopulmonary bypass were selected from June 2021 to June 2024. The patients were 50 to 75 years old and did not have severe hepatic or renal insufficiency. The Mini-Mental State Examination was completed 1 day before the operation. Patients were routinely established for cardiopulmonary bypass. Patients were randomly divided into four groups (n = 55): hypothermia + normal saline group (L0), hypothermia + dexmedetomidine group (L1), hyperthermia + normal saline group (H0) and hyperthermia + dexmedetomidine group (H1). The nasopharyngeal temperature was maintained at (30 ± 1)℃ in the hypothermia group and (33 ± 1)℃ in the high-temperature group during the reflux period. Dexmedetomidine injection was intravenously injected at 1 μg/kg 10 minutes before anesthesia in L1 and H1 groups, and pumped continuously at a rate of 0.5 μg/(kg·h) until the end of surgery. L0 and H0 groups were given equal volume of normal saline until the end of operation. 5 mL of central venous blood was collected before the beginning of anesthesia (T1), at the end of surgery (T2), 24 h (T3) and 48 h(T4) after surgery, and serum neuron specific enolase (NSE), interleukin-6 (IL-6) and tumor necrosis factor -α(TNF-α) levels were detected by ELISA. The levels of superoxide dismutase (SOD) and malondialdehyde (MDA) in serum were determined by xanthine oxidase method and thiobarbituric acid method. The Confusion Assessment Method-ICU was used to evaluate the occurrence of POD. Results 220 patients were finally enrolled, including 81 patients in POD group, with an incidence of 36.8%. Compared with NPOD group, the concentrations of NSE, IL-6, TNF-ɑ and MDA in POD group were increased, while the concentration of SOD was decreased.Compared with L0 group, the concentrations of NSE, IL-6, TNF-ɑ and MDA were decreased and the concentration of SOD increased in L1 group.Compared with H0 group, NSE, IL-6, TNF-ɑ and MDA concentrations in H1 group were decreased, while SOD concentration was increased.Compared with L0 group, concentration of NSE, IL-6, TNF-ɑ and MDA increased, while the concentration of SOD decreased in H0 group. Compared with L1 group, concentration of NSE, IL-6, TNF-ɑ and MDA increased, while the concentration of SOD decreased in H1 group. Conclusion Hypothermia combined with dexmedetomidine during cardiopulmonary bypass can reduce oxidative stress response and POD in patients.

Key words: cardiopulmonary bypass, hypothermia, dexmedetomidine, oxidative stress, inflammatory reaction

CLC Number: