Explain the mechanism for post obstructive pulmonary odema .
If the obstruction occurs primarily with forced inspiration as the patient struggles to inhale (Müller manoeuvre), it causes a high negative intrathoracic pressure that increases venous return. The resulting edema is caused by a sudden, marked decrease in the negative pleural pressure, which leads to a high hydrostatic pressure gradient between the intravascular and extravascular compartments.
Name some causes for post obstructive pulmonary oedema.
Postobstructive pulmonary edema occurs after relief from an upper airway obstruction and represents a pure form of hydrostatic edema. It is most frequently caused by an impacted foreign body, laryngospasm, epiglottitis, or strangulation.
Name a complication after extubation seen here.
Normal heart size. Perihilar butterfly pattern patchy haziness.
No pleural effusion. Normal vascular pedicles.