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Chinese Journal of Geriatrics Research(Electronic Edition) ›› 2024, Vol. 11 ›› Issue (02): 20-25. doi: 10.3877/cma.j.issn.2095-8757.2024.02.005

• Clinical Research • Previous Articles    

Effects of utrasound-guided stellate ganglion block on pulmonary shunting and cerebral oxygen metabolism in elderly patients undergoing single-lung ventilation

Yun Zhou1, Li Han2, Yue Zhao2, Chen Yuan2, Changjian Yang2, Fen Yang2, Yang Xie2,()   

  1. 1. Department of Anesthesiology, the Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Suzhou 215000, China; Department of Anesthesiology, Xinghai Hospital of Suzhou Industrial Park, Suzhou 215002, China
    2. Department of Anesthesiology, the Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Suzhou 215000, China
  • Received:2023-11-28 Online:2024-05-28 Published:2024-09-10
  • Contact: Yang Xie

Abstract:

Objective

To observe the impact of ultrasound-guided stellate ganglion block (SGB) on intrapulmonary shunt and cerebral oxygen metabolism in elderly patients undergoing single-lung ventilation.

Methods

Ninety-six elderly patients who underwent thoracic surgery under one lung ventilation at Suzhou Hospital Affiliated to Nanjing Medical University from April 2020 to October 2022 were selected. Among them, 48 patients received SGB on the ventilation side under ultrasound guidance before general anesthesia (SGB group), and the remaining 48 patients did not receive SGB (control group). At the immediate start of the procedure (T0), before single-lung ventilation (T1), 15 min (T2), 30 min (T3), 60 min (T4) after single-lung ventilation, and 15 min after resumption of two-lung ventilation (T5), the patient's physiological indices, including the mean arterial pressure (MAP) and heart rate (HR), were monitored and recorded; arterial and jugular venous blood gases were analyzed to obtain pulmonary shunt fractionn (Qs/Qt) and oxygenation index (OI); Jugular venous oxygen saturation (SvO2) and obstructed side cerebral oxygen saturation (rSO2) were recorded, and cerebral oxygen consumption rate (CERO2) was calculated. Complications related to SGB and postoperative pulmonary complications within 72 hours were documented. T test or analysis of variance was used for measurement data, and Chi-square test was used for counting data.

Results

A total of 93 patients were ultimately included in the statistical analysis, including 46 in the SGB group and 47 in the control group. The SGB group exhibited lower HR and more stable MAP during surgery compared with the control group (F=333.662, P < 0.05). After single-lung ventilation, both groups showed significantly increased intrapulmonary shunt. OI in the SGB group was higher, and Qs/Qt was lower than the control group at T2-T5 (F=793.218, 549.716; P < 0.05). At time points T2 to T4, the control group showed a significant decrease in SvO2 and rSO2 compared with preoperative values, accompanied by an increase in Ca-vO2 and CERO2. In contrast, the SGB group did not exhibit statistically significant changes in SvO2, rSO2, Ca-vO2, and CERO2 compared with the preoperative values. Intergroup comparisons revealed that at time points T2 and T3, SvO2 and rSO2 were higher in the SGB group than those in the control group (P < 0.05), while Ca-vO2 and CERO2 were lower in the SGB group than those in the control group (P < 0.05). Two cases of unilateral recurrent laryngeal nerve blockade and one case of brachial plexus blockade occurred in the SGB group, resolving within 24 hours without special treatment. No severe pulmonary complications occurred in both groups.

Conclusion

Ultrasound-guided SGB helps reduce intrapulmonary shunt during single-lung ventilation, improving intraoperative oxygenation and cerebral oxygen metabolism, providing a certain level of cerebral protection.

Key words: Stellate ganglion block, Ultrasound-guided, Single-lung ventilation, Intrapulmonary shunt, Cerebral oxygen metabolism

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