Daniel Lichtenstein is a medical intensivist, visiting Professor, since 1989 at François Jardin's medical I.C.U.

He defined in 1991 critical ultrasound, a whole-body approach to the critically ill, mainly focused around lung ultrasound with extensions to acute respiratory failure (the BLUE-protocol), circulatory failure (the FALLS-protocol), and interventional ultrasound (thoracocentesis, venous line insertions, ...) using simple equipment and a unique probe.

One textbook (last Edition, 2010, Springer), two dozens of original articles (critical, venous and lung ultrasound).

President of CEURF (international training center with personnalized training at the bedside).