Bruises, tears, abrasions, inflammation and lacerations may be visible. Bleeding time from minor lacerations or abrasions is usually prolonged. Mechanical trauma occurs in the form of friction, pressure, abrasions, lacerations and contusions. Soft tissue injuries can be generally grouped into three categories&colon; contusions, abrasions and lacerations. These can be tears, bruises, inflammation and abrasions. Cordura fabrics are durable and resistant to abrasions, tears and scuffs. Abrasions or lacerations of the hand are also likely to occur. He had multiple bruises, swellings and abrasions on his face and head. Other passengers suffered minor injuries such as abrasions and sprains. Skin damage due to burns, abrasions, wounds and skin diseases also increase absorption. They are expected to produce contusions, abrasions, and hematomas. It may be used in first aid for minor cuts, grazes, burns, abrasions and blisters. These alterations, accretion and attrition, are commonly the abrasions and scratches on the vessel. Transmission by direct inoculation through puncture wounds or abrasions is less common. For medical purposes, saline is often used to flush wounds and skin abrasions.