ASV - Adaptive Support Ventilation Summary Basic Set Parameters: 1) Target MV (80-120%) 2) PEEP 3) FiO2 What's Happening: - Input height (IBW) to determine ideal minute ventilation. The vent attempts to achieve this MV w/ lowest amount of work by optimizing 1) Pinsp (pressure with each breath) 2) Rate, which depends on the # of breaths the patient initiates. - Patients can be almost completely dependent to completely spontaneous. Best for: - Patients with some respiratory drive - Patients with no significant pulmonary pathology Downside: - While a "weaning" mode, it's hard to know exactly how reliant the patient is on the vent. - Limited control. Not ideal for patients with ARDS, COPD, asthma or other sig pulm pathology Troubleshooting: - Confirm the patients height and IBW are entered correctly. - Decreasing the % of predicted needed MV can mitigate hyperventilation but if <80% choose different mode - If pt apneic on SBT after being on ASV, it's like they were hyperventilated Assess: - No. of spontaneous breaths - Degree of support for delivered breaths Casey Albin, MD @caseyalbin #ASV #Adaptive #Support #Mechanical #Ventilation #pulmonary
