PENG block and pre-habilitation

INTERVENTION: Pericapsular Nerve Group Block using 20ml of 0.375% ropivacaine in intervention group; 20ml of saline in control group CONDITION: D005265 Femoral neck fracture ; Femoral neck fracture, hip fracture PRIMARY OUTCOME: Success rate of mobilization in the initial preoperative rehabilitation (defined as transferring to a wheelchair with the assistance of a physical therapist) SECONDARY OUTCOME: (1) Achievement of the following rehabilitation items in the initial rehabilitation (total of 5 items; 1 point if achieved, 0 point if not achieved, full score of 5 points; under the assistance of a physical therapist):; 1) Bed sitting position; 2) Edge sitting position; 3) Stand up; 4) Maintaining a standing position (holding a standing position for 10 seconds with support for unloading the affected leg using a walker); 5) Wheelchair transfer; (2) NRS (pain score) at the time of implementation of each item; (3) Level of achievement of rehabilitation after the second preoperative session; (4) Preoperative hemoglobin; (5) Intraoperative blood loss amount; (6) Complications within 1 week after surgery (thromboembolic event); (7) POD3 Cumulated Ambulation Score (CAS; score that predicts postoperative patient's motor function; correlates with postoperative outcome); (8) Achievement of postoperative rehabilitation using the protocol shown in (1); (9) Required number of days for each postoperative rehabilitation item; (10) Discharge time; (11) Discharge destination (home, rehabilitation hospital, facility, unable to transfer hospital, etc.); (12) Half year mortality, ADL INCLUSION CRITERIA: (1) Patients who are 20 years old or older at the time of obtaining the consent form (2) Patients with a Garden stage 3‐4 femoral neck fracture who are scheduled artificial head replacement surgery (3) ASA‐PS (American Society of Anesthesiologists physical status): 1 (good general condition without complications) to 3 (severe systemic disease but not incapacitated)