What are the survival rate of patients ending up on ventilators?

According to many sources

Studies in China:

According to the Zhou, et al. (2020) lancet journal ‘Clinical course and risk factors for mortality of adult inpatients with COVID-19 in Wuhan, China: a retrospective cohort study‘  The article reported that 32 patients required invasive mechanical ventilation, of whom 31 (97%) died. 

According to Wang et al (2020) Clinical Characteristics of 138 Hospitalized Patients With 2019 Novel Coronavirus–Infected Pneumonia in Wuhan, China. The article reported that 26% of patients required admission to the intensive care unit (ICU) and 4.3% died, but a number of patients were still hospitalized at the time. 

According to Huang et al (2020) Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China  The article reported that out of 41 admitted hospital patients, 13 (32%) patients were admitted to an ICU and six (15%) died.   

According to Cao et al (2020) Clinical features and short-term outcomes of 18 patients with corona virus disease 2019 in intensive care unit – The article reported that 102 patients was studied.   Of 18 admitted to ICU, 17 died.  Only one third were ventilated as others had septic shock or were non-compliant with mechanical ventilation.  

Study in UK

According to ICNARC report on COVID-19 in critical care (UK), Intensive Care National Audit and Research Centre, 27 March 2020 The mortality rate in intensive care close 48%.