The Effect of Bupivacaine Liposome Preemptive Analgesia on Postoperative Pain and Delirium in Elderly Patients Undergoing Hip Fracture Surgery

The control group routinely injected tramadol 100mg(Tramal) intramuscularly

the experimental group was given ultrasound-guided high iliofascial space block: High-frequency linear probe (5-13 MHZ, Sonosite, USA) was used to identify the iliac bone, iliac muscle and deep circumiliac artery. Then a short oblique puncture needle was used, with the intraplanar technique, and the needle was inserted from the outside. When the needle tip reached the surface of the iliac muscle (iliac fascia space), 20ml of bupivacaine liposome was injected. After the operation, electrocardiogram monitoring(Mindray) was performed for 1 hour to observe adverse reactions.