Installation for administering gaseous NO with gas injection module

Gas supply installation (1, 2, 3) comprising a gas injection module (500, 800), to which there are connected:

• a mechanical ventilator (2) supplying a flow of respiratory gas containing at least 20 vol % of oxygen, and
• an NO delivery apparatus (1) supplying a flow of NO/N2 gas mixture,
• said gas injection module (500, 800) comprising a tubular module body (803) through which there extends an internal passage (811) comprising a longitudinal axis (AA),
• said tubular module body (803) comprising:
• an upstream port (801) through which the flow of respiratory gas can enter the internal passage (811),
• a downstream port (802) through which a combined gas flow can exit the internal passage (811),
• an external injection conduit (807) fluidically connecting to the tubular module body (803) and comprising an internal passage (813) for conveying the flow of NO/N2 gas mixture, and
• a tubular expansion (812) forming an injection nozzle arranged in the internal passage (811) of the tubular body (803) and comprising an internal nozzle passage (808) in fluidic communication with the internal passage (813) of the injection conduit (807), said tubular expansion (812) further comprising an injection port (809) arranged at a free end (812.1) of said tubular expansion (812), said injection port (809) opening into the internal passage (811) of the tubular module body (803),
• characterized in that the tubular expansion (812) of the tubular module body (803) of the injection module (500, 800) has a generally curved or angled shape and comprises at least one section carrying the injection port (809), arranged parallel to the longitudinal axis (AA) and directed towards the downstream port (802).