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The authors make a bibliographical review of methods for studying the microbiological contamination of closed atmosphere. In a first part, they study the origins of bacterial emission (emissions from nose and pharynx, aerosolization by hospital hands manipulations, skin's emissions). In a second part, the study concern the measure of atmospheric contamination. The authors insist on the correlation may be existed between the counting of all dimensions particles and the bacteria's presence in air. They analyse in details the biological methods of measure (sedimentation, centrifugation, filtration impact) and suggest a room classification according to theirs biological contaminations.

One case of traumatic rupture of the isthmic region of the aorta is reported. Acute ischemia of the inferior limbs, anuria and paraplegia have led to the diagnosis. During the first hours after the trauma bowel ischemia appeared. The repair of the aorta was achieved within the seven hours after the accident but the bowel ischemia stayed irreversible. A such complication has not been reported in the literature as long as we know and we are think that it is possible to range this complication among some of the ischemic enterocolitis.

The artificial left ventricule is placed in the paracardiac position to ensure a short circuit of the natural left ventricule which is left in position. The prosthesis is implanted on the tip of the heart to ensure wide drainage of the left ventricule and on the ascending aorta to obtain systolic injection under physiological hemodynamic conditions. On both sites of implantation are sutured dacron tubes which permit insertion of the prosthesis without interrupting the general circulation and its withdrawal by simple ligature of the tubes of dacron.

A device for assistance of the left side of the heart in acute failure is placed in the paracardiac position. The blood is drained into the apparatus through the apex of the heart and is reinjected into the ascending aorta by an artificial pump. The flow of blood within the prosthesis and at the level of the inlet and outlet values is studied by a system of lighting in thin layers. Several types of original valve have been tested but the most satisfactory results were obtained with a classical bead valve.