Muscle Laceration

Muscle laceration occurs as a result of direct penetrating injury. The laceration fills with haematoma which appears of low echogenicity (Fornage 2000). There is a high risk of scar formation. 

Examples Cut, puncture, laceration, abrasion, fracture, bruise, amputation, insect bite, electrocution, or a thermal, chemical, electrical, or radiation bum. Sprain and strain injuries to muscles, joints, and connective tissues are classified as injuries when they result from a slip, trip, fall or other similar accidents. 

Post-traumatic stenoses occur after direct trauma or rupture of the urethral canal due to pelvic fracturing, with laceration of the perineal muscles. They differ from inflammatory stenoses to the extent that they affect different areas of the urethral tract and are normally one-off short-lived episodes. 

Fig. 3.15a,b. Closed contusion trauma. Two different cases of thigh muscle injuries following blunt trauma by sharp objects, a Transverse 12-5 MHz US image over the vastus lateralis (m) reveals an extensive laceration of muscle tissue filled in with hypoechoic hematoma (arrowheads). Note the intact subcutaneous tissue (s). b Transverse 12-5 MHz US image over the medial thigh demonstrates combined laceration of the subcutaneous tissue (s) and the gracilis muscle (m) with interruption of the fascia (arrows). The defect is filled in with hypoechoic hematoma (arrowheads)... 

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