Peripheral Nerve Block vs Spinal Anesthesia in Hip Surgery

Anesthesia plays an important role in the patient's outcome: each anesthesiological technique has a different cardiovascular impact, because they act differently on the autonomic nervous system, which in turn regulates heart rate, myocardial contractility and vascular tone. Subarachnoid anesthesia can result in a reduction in cardiac output, hypotension and bradycardia due to blockage of the nerve fibers of the sympathetic system, while peripheral nerve block is associated with a lower impact on the autonomic nervous system, therefore less influence on hemodynamic changes compared to subarachnoid anesthesia. Hypotension can lead to myocardial ischaemia, especially in patients at high surgical risk. In addition, peripheral nerve block allows for better coverage from postoperative pain compared to subarachnoid anesthesia in patients undergoing hip surgery. This leads to less postoperative stress, with less impact on cardiac and respiratory function. Numerous studies have shown the efficacy and safety of regional anesthesia in hip surgery. This study aims to compare the hemodynamic changes of subarachnoid anesthesia and peripheral nerve block in patients who underwent total and partial hip replacement