avulsion - n. 扯开,撕裂,扯离的部份;

• Avulsion of the splenic vessels should be considered as a cause of hypotension in any patient presenting with an acutely obstructed volvulus.
• This is called a partial nail avulsion (PNA).
• The initial phase III studies involved patients with Multiple Sclerosis, neuropathic pain, brachial plexus avulsion and cancer pain.