Background: Because no fasting, specific preparation, or preoperative optimization is necessary, regional block anaesthesia is the greatest alternative for life-saving surgeries when both general anaesthesia and central neuraxial anaesthesia are dangerous. It is also more stable than the central neuraxial blockade, which has adverse effects such as hypotension, bradycardia and meningitis. Peripheral nerve blocks also give surgical anaesthetic with higher cardiorespiratory stability. Peripheral nerve blocks (PNBs) are becoming more common in the field of anaesthesia as novel methods like ultrasonography and peripheral nerve stimulators have been developed. The goal of this project is to examine new developments in ultrasound guided nerve blocks and excellent anaesthetic techniques for lower limb surgery to improve patient satisfaction. Conclusion: For femoral fractures, the US-guided three-in-one FNB is a simple and safe treatment that may be done in the emergency department with little US expertise. Rapid, effective anaesthesia is provided by the three-in-one FNB, which has also been demonstrated to reduce opioid and local anaesthetic requirements for pain control.