Macintosh, David Lloyd

He was an orthopedic surgeon in Toronto ON.

He attended Dalhousie University (MD) and the the University of Toronto (post-graduate studies).

From 1951 to 1958, he provided medical services at Hart House and gained worldwide recognition for his discoveries related to torn anterior cruciate ligaments (ACL).

He was the first in the world to describe the ‘pivot shift’ manoeuvre, which remains the gold standard test for ACL injury diagnosis. In the late 1950s, Dr. MacIntosh performed and published the first successful ACL reconstruction, a procedure that had been eluding doctors since the 1870s.

He retired in 1984.

He was appointed as a Surgeon Lieutenant (Temp.) RCNVR (With seniority dated 25/01/1941).

He served with the Royal Navy during the Second World War.

He worked with Dr. Haldane on underwater diving physiology.

He served in HMS Philante as Medical Officer. (He was demobilized.) (He was demobilized 1945.)

The David L. MacIntosh Sport Medicine Clinic (University of Toronto);

He pioneered the first successful surgery for the management of the torn anterior cruciate ligament (ACL) of the knee. This common and serious injury in skiers, field athletes, and dancers invariably brought an end to their athletics due to permanent joint instability. Working with injured football players, Dr MacIntosh devised a way to re-route viable ligament from adjacent structures to preserve the strong and complex mechanics of the knee joint and restore stability. The subsequent development of ACL reconstruction surgery has allowed numerous athletes to return to the demands of sports at all levels.