Draw a line from the right anterior superior spine of the ilium to the navel. On this line, an inch and a half from the anterior superior spine, we find McBurney's point. Tenderness on deep pressure at this point gives presumptive evidence of an irritative process in the vicinity of the appendix vermiformis, but tenderness on superficial pressure at this point may mean irritation of sensory nerves of the abdominal wall, and the irritation may be due to causes ranging from hysteria to toxemia. McBurney's point is of great diagnostic value to physicians who possess a considerable degree of collateral knowledge, aside from their familiarity with the symptoms of appendicitis.
Instead of going out on the line to a point an inch and a half from the anterior superior spine of the ilium, come back on the line to a point situated an inch and a half from the navel.
MORRIS RT. McBURNEY'S POINT AND ANOTHER POINT IN APPENDIX DIAGNOSES. JAMA. 1908;L(4):278. doi:10.1001/jama.1908.25310300030003
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