Mechanism of Cardiac and Cerebral Function Injury Caused by Intraoperative Limb Ischemia-reperfusion
Ischemic Reperfusion Injury
About this trial
This is an interventional prevention trial for Ischemic Reperfusion Injury
Eligibility Criteria
Inclusion Criteria: Patients undergoing TKA under general anesthesia Voluntarily sign the informed consent ASA Grade I to III BMI 18-28 kg/m2 Exclusion Criteria: Congenital heart disease or history of cardiac surgery, heart conduction disease, frequent ventricular/atrial premature beats, atrial fibrillation and other serious arrhythmias Severe liver disease and kidney disease Temporary and permanent pacemaker implantation Patients with serious central nervous system diseases or serious mental disorders Recent history of sedation, antidepressant or opioid use Body mass index >35kg/m2 Participants in other clinical trials within 1 month prior to study enrollment.
Sites / Locations
- The Third Hospital of Hebei Medical UniversityRecruiting
- The Third Hospital of Hebei Medical UniversityRecruiting
Arms of the Study
Arm 1
Arm 2
Arm 3
Arm 4
Sham Comparator
Experimental
Experimental
Experimental
C group
DEX group
ERIPC group
LRIPC group
Before induction of anesthesia, general anesthesia was performed after ultrasound-guided femoral nerve block
Before induction of anesthesia, general anesthesia was performed after ultrasound-guided femoral nerve block. Dexmedetomidine 0.8μg/kg was pumped intravenously for 10min 15min before induction of anesthesia, and then continued to be infused at 0.5μg/ (kg·h) until 30min before the end of surgery
Before induction of anesthesia, ultrasound-guided femoral nerve block was performed, and then general anesthesia was performed. After induction of anesthesia, orthopedic tourniquet was tied and inflated to 200 mmHg(1 mmHg=0.133 kPa) for 5 min and deflated for 5 min, and three cycles were repeated
An orthopedic pressure tourniquet was placed on the lower extremity 24 h before surgery and inflated to 200 mmHg for 5 min and deflated for 5 min. Three cycles were repeated