Soleno Therapeutics, Inc., formerly Capnia, Inc., is a healthcare company that develops and commercializes neonatology devices and diagnostics. The Company also has a therapeutics platform based on its proprietary technology for precision metering of gas flow. The Company offers products, such as CoSense end-tidal carbon monoxide (ETCO) Monitor, NeoPIP Infant Resuscitator and Accessories, and Serenz Nasal Relief. The Company has developed the CoSense End-Tidal Carbon Monoxide Monitor that measures ETCO for the detection of dangerous hemolysis rates. The Infant Solutions product line, including the NeoPIP Infant Resuscitator Unit and accessories, is designed for controlled and accurate resuscitation of neonates and infants in the clinical environment. Serenz Nasal Relief is a hand-held nasal irrigator that uses carbon dioxide (CO2) gas to wash the nasal passages.