Abstract: An injection system for the delivery of a gaseous substance to a patient respiratory system is described herein. The injection system includes a control unit and a valve assembly including a valve and a valve actuator allowing partial opening of the valve and controlled by the control unit. The control unit is supplied with gas flow data and controls the valve assembly so that the opening of the valve is a function to the gas flow to thereby enable the control over the concentration of the gaseous substance delivered to the patient.

Abstract: An injection system for the delivery of a gaseous substance to a patient respiratory system is described herein. The injection system includes a control unit and a valve assembly including a valve and a valve actuator allowing partial opening of the valve and controlled by the control unit. The control unit is supplied with gas flow data and controls the valve assembly so that the opening of the valve is a function to the gas flow to thereby enable the control over the concentration of the gaseous substance delivered to the patient.

Abstract: A controllable camera support including a pivoting arm adapted to be rotatably connected to a pivot point defining a first rotational axis. The pivoting arm also defines a radial axis. The camera support also includes a camera holder mounted on the pivoting arm. The camera holder is displaceable along the radial axis. The camera further includes motors coupled to the pivoting arm and to the camera holder. The motors are adapted to impart rotational and radial motions to the camera holder. The camera support also includes a control device for controlling the motors. The invention also covers a system further including a focal adjustable, rotational, tilting camera mounted on the camera holder. When a target that is focused by the camera becomes obstructed, the control device is adapted to move the camera to another position all the while focusing on the target.