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Imaging in the ICU. Modalities. X-Ray CT scans MRI Ultrasound examinations Angiography Flouroscopy. X-Ray. Most common AP view Centering difficult Exposure equalization difficult X-Rays other than chest difficult. ??. Case 1.
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Imaging in the ICU Kishore P. Critical Care Conference
Modalities • X-Ray • CT scans • MRI • Ultrasound examinations • Angiography • Flouroscopy Kishore P. Critical Care Conference
X-Ray • Most common • AP view • Centering difficult • Exposure equalization difficult • X-Rays other than chest difficult Kishore P. Critical Care Conference
Case 1 • 70 year old diabetic reverend admitted to the ICU for Urosepsis. Intubated for poor sensorium and labored breathing. On treatment gradually getting better. On day 5, being weaned from ventilation when he desaturates with no hemodynamic instability. On examination has decreased breath sounds on right side and crackles bilaterally Kishore P. Critical Care Conference
Collapse • Humidification • Suction • Chest physiotherapy • Position • PEEP • Bronchoscopy Kishore P. Critical Care Conference
Case 2 • 30 yr old man with AML on chemotherapy develops bilateral fungal pneumonia. He is intubated for persistent hypoxia in spite of CPAP. His lung infiltrates worsen on Amphotericin and antibiotics and he requires high peep, low tidal volumes and prone position ventilation to maintain saturations of 88-92%. He is also on high inotropes. On Day 15, he develops a sudden deterioration of oxygenation and hemodynamics. Kishore P. Critical Care Conference
898326C • 20 yr old primi with scrub typhus
Pneumothorax • Deep sulcus sign Kishore P. Critical Care Conference
Clinically suspected pneumothorax Hemodynamic compromise Suspected tension Hemodynamically stable FiO2 100% Reduce PEEP to 3 FiO2 100% Reduce PEEP to 3 Chest X-Ray Needle aspiration and chest tube placement Mechanical ventilation Symptomatic Self ventilating asymptomatic Conservative management Chest X-Ray Chest tube/pigtail Kishore P. Critical Care Conference
Case 3 • Patient with Multiple Myeloma on mechanical ventilation for respiratory failure due to bilateral pneumonia. • FiO2 100%, PEEP 15cm H2O, TV 360ml Rate 35/min. Kishore P. Critical Care Conference
A B 16 year old girl with ITP,autoimmune thyroiditis and medium vessel vasculitis on mechanical ventilation with high PEEP for ARDS due to viral pneumonia
A B
Causes of pneumomediastinum in mechanical ventilation • High tidal volumes • High PEEP • “fighting” the ventilator • Auto PEEP Kishore P. Critical Care Conference
Case 4 • 35 yr old lady with SLE and lupus nephritis and mild CRF on steroids is intubated for severe hypoxia when she presents to the emergency department with breathlessness. Examination reveals bilateral crackles. She is started on cover for bacterial, fungal and PCP etiologies. Kishore P. Critical Care Conference
The VPW is measured by (1) dropping a perpendicular line from the point at which the left subclavian artery exits the aortic arch and (2) measuring across to the point at which the superior vena cava crosses the right mainstem bronchus Ely, E. W. et al. Chest 2002;121:942-950 Kishore P. Critical Care Conference
Patients with a VPW > 70mm coupled with a cardiothoracic ratio >0.55 are more than three times likely to have a Pulmonary Artery Occlusion Pressure > 18mm Hg compared to those without these findings. Kishore P. Critical Care Conference
Review • Collapse • Deep sulcus sign for pneumothorax • Pneumomediastinum • Fluid overload-VPW • Pleural effusion • Wayward lines Kishore P. Critical Care Conference