Rainmed Medical Ltd. raised HK$146 million (US$19 million) in an initial public offering in Hong Kong. Its shares debuted at HK$5.60 and dropped as much as 15.38% to close at HK$5.28 on July 8, 2022, the first trading day. Jiangsu, China-based Rainmed Medical plans to use 80% of the proceeds to support the development and commercialization of its core products – a coronary angiography-derived fractional flow reserve (caFFR) system and a coronary angiography-derived index of microvascular resistance (caIMR) system.