https://www.selleckchem.com/products/otx015.html Hydraulic heads were measured to an accuracy of ±0.0065 m, and the average hydraulic gradient was estimated to be 8.0 × 10-6 (±0.9 × 10-6 ) m/m. The improvement in accuracy allowed for two reversals in the groundwater flow direction to be identified, after which the gradient averaged 2.5 × 10-5 (±0.4 × 10-5 ) m/m. This study showed it is possible to sufficiently control sources of error to measure hydraulic gradients in the 10-6 to 10-5 m/m range. COVID-19 disease can lead to severe functional impairments after discharge. We assessed the quality of life of invasively ventilated COVID-19 ARDS survivors. We carried out a prospective follow-up study of the patients admitted to the Intensive Care Units (ICUs) of a teaching hospital. Patients affected by COVID-19 ARDS who required invasive ventilation and were successfully discharged home were assessed through the telephone administration of validated tests. We explored survival, functional outcomes, return to work, quality of life, cognitive and psychological sequelae. The main variables of interest were the following demographics, severity scores, laboratory values, comorbidities, schooling, working status, treatments received during ICU stay, complications, and psychological, cognitive, functional outcomes. Out of 116 consecutive invasively ventilated patients, overall survival was 65/116 (56%) with no death occurring after hospital discharge. Forty-two patients were already discharged home with a median follow-up time of 61 (51-71) days after ICU discharge and 39 of them accepted to be interviewed. Only one patient (1/39) experienced cognitive decline. The vast majority of patients reported no difficulty in walking (32/3582%), self-care (33/3985%), and usual activities (30/3978%). All patients were either malnourished (15/3938%) or at risk for malnutrition (24/3962%). Exertional dyspnea was present in 20/39 (51%) patients. 19/39 (49%) reported alterations in senses of