Vol. 5, Issue 3, Part B (2021)

A medical ventilator is a machine designed to move breathable air in and out of the lungs, to provide breathing for a patient who is physically unable to breathe, or breathing insufficiently. The early history of mechanical ventilation begins with various versions of what was eventually called the iron lung, a form of non-invasive negative pressure ventilator widely used during the polio epidemics of Copenhagen, Denmark, in 1952. Whenever a patient is posted for laparotomy, a detailed clinical history followed by clinical examination and routine lab investigations will be done. If needed special investigations also will be done. Patient is categorized according to ASA classification and NYHA classification whenever applicable. After laparotomy details, of surgery were also collected. Surgery was elective for 143 patients and emergency for 48 patients. 25% of surgeries were emergency.8 out of 48 emergency surgery patient required ventilatory support (16.6%). 8 out of 14 ventilator patients were emergency surgery patients (57%). From this emergency surgery is found to be an important risk factor for post-operative invasive ventilation with an odds ratio of 4.567 and P value of 0.008.