Comparison Effects of Lumbosacral Plexus Block and Sacral Plexus Block + Suprainguinal Fascia Iliaca Plane Block Combination on Perioperative Pain Measured With Analgesia Nociceptive Index Monitor on High-risk Patients Undergoing Hip Fracture Surgery

The most preferred types of anesthesia in hip surgery are general anesthesia or neuraxial blocks. Both types have advantages as well as disadvantages. They may cause hemodynamic instability in geriatric and comorbid patient groups.

Peripheral nerve blocks have been associated with fewer complications both in the treatment of postoperative pain and in fragile, high-risk patients, making them an alternative to other anesthesia types.

It is important for patients to accurately measure their perioperative analgesic needs. There are many subjective methods for assessing pain. In the evaluation of analgesia level with Analgesia Nociception Index (ANI) monitorization, it is advantageous to evaluate the objective findings measuring parasympathetic system activity.

ANI is a monitor that can be measured continuously and non-invasively. It measures parasympathetic tone - based on electrocardiography - by analyzing minimal changes in heart rate that occur under anesthesia, in the early stages of awakening, and in each respiratory cycle of awake patients. At the end of the measurement, a value between 0-100 is obtained.

Parasympathetic modulation (stress level, e.g., pain) is obtained with a minimum value of 0 and a maximum of 100. ANI values measured in the early period of recovery correlate with pain scores. When compared with hemodynamic parameters, it has been reported that the ANI response is more sensitive to nociceptive stimuli occurring in the intraoperative period.