involuntary guarding

in·vol·un·tar·y guard·ing

abdominal muscle spasm, caused by retroperitoneal inflammation, which cannot be willfully suppressed.
References in periodicals archive ?
We report a 37 year old multi-parous lady, who in her third trimester of pregnancy, presented to the emergency room with acute diffuse abdominal pain and involuntary guarding. Findings on physical examination were consistent with peritonitis and a decision was made by the admitting team to perform an urgent laparotomy.
Physical examination revealed a distended rigid abdomen, with involuntary guarding and generalized rebound tenderness.
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