Development and Evaluation of a Precision Rehabilitation Program Based on Bedside Musculoskeletal Ultrasound for ICU-Acquired Weakness in Critically Ill Patients

INTERVENTION: Control group:Receive the regular rehabilitation exercises carried out by the same rehabilitation team;Experimental group:Accepting individualized early rehabilitation exercises guided by point‐of‐care musculoskeletal ultrasound; CONDITION: ICU‐acquired weakness PRIMARY OUTCOME: rectus femoris thickness;Thickness or cross‐sectional area of the anterior tibialis muscle;Thickness or area of the flexor digitorum superficialis muscle;Diaphragmatic mobility;Transverse cross‐sectional area of the rectus femoris muscle;The rate of change in diaphragm thickness;Femoral rectus muscle wing‐shaped angle; SECONDARY OUTCOME: FSS ‐ ICU Scale;Muscle strength score; INCLUSION CRITERIA: Critically ill patients who meet the inclusion criteria (expected ICU stay >72 hours and at risk for ICU‐acquired weakness).