Clinical Application Of Ultrasound On Muscle Morphology And Hemodynamics After Limb Injury

OBJECTIVES: To measure the morphological parameters of the quadriceps(femoral rectus,medial femoral muscle,lateral femoral muscle,medial femoral muscle)and the changes in hemodynamic parameters of the lower extremity femoral artery in patients with distal fractures of the lower extremities by ultrasound and to explore the relationship between these parameters and the disuse muscle atrophy and provide reference data for early clinical rehabilitation.METHODS: Twenty patients with distal extremity fractures requiring bed-rest were divided into the affected side of the observation group and the healthy side of the observation group.The observation group was detected the parotid muscle area,quadriceps thickness and femoral artery blood flow spectrum parameters of the lower extremities,and repeated measurements on the first,fourth,seventh,and tenth days by ultrasound since hospital admission,four times in total,in order to observe the changes in these data over time.Simultaneously,in order to find difference,the femoral artery blood flow spectrum parameters of day 1 was compared with that of day 10 in the two groups respectively.RESULTS:(1)In both observation groups,the thickness and area of the rectus muscle,the thickness of the lateral femoral muscle,and the thickness of the medial femoral muscle at four times all gradually decreased,which were statistically significant(P<0.05).The shrinking time,the earliest,started on the 4th day after the ipsilateral medial femoral muscle was braked;(2)The result of the comparison of the femoral artery blood flow spectrum parameters of day 1 and day 10: In the early diastolic phase,the reverse blood flow velocity reduced,and the duration of reverse blood flow shortened,which were statistically significant(P<0.05).(3)The result of the comparison of the value at four times of the affected femoral artery: the reverse blood flow velocity in the early diastolic phase,and the duration of the reverse blood flow in the early diastolic phase all gradually decreased,which were statistically significant(P<0.05).CONCLUSIONS: There is muscle atrophy in the quadriceps of patients with lower extremity injury in a short time.Also it brings siginiance in the lower extremity femoral artery hemodynamics,which was reflected in the changes in diastolic blood flow parameters and ultrasound can assess muscle atrophy through changes in muscle thickness.