Functional obstruction of pulmonary blood flow: This has a good prognosis if it is reversible. Causes include polycythemia and hyperfibrinogenemia. Diagnosis
To help with diagnosis, the clinician can watch out for predisposing factors, such as: birth asphyxia, meconium aspiration, use of NSAIDs (non steroidal anti-inflammatory drugs) and SSRIs (selective serotonin reuptake inhibitors)  by the mother, and early onset sepsis or pneumonia. To diagnose a fetus with pulmonary hypertension, PVR must be higher than systemic vascular resistance, resulting in high afterload and decreased systemic blood flow. This causes a significant decrease in oxygen concentration, which clinically manifests as insufficient blood flow to the lower body, while there is adequate circulation to the head and right side of the body. Other echocardiographic findings in PPHN include right ventricular hypertrophy, deviation of the ventricular septum, tricuspid regurgitation, and shunting at the patent foramen ovale.Other clinical signs that may signify PPHN are respiratory distress, partial pressure of oxygen greater than 100 mg and elevated partial pressure of carbon dioxide. A gradient of 10% or more in oxygenation saturation between simultaneous preductal and postductal arterial blood gas values in absence of structural heart disease documents persistent fetal circulation. Since this may be a sign of other conditions, persistent fetal circulation must also be characterized by enlargement of right and left ventricles often confirmed through a definitive ECG.Persistent fetal circulation in neonates can be reversible or irreversible depending on the classified etiology listed above.
Pityriasis commonly refers to flaking (or scaling) of the skin. The word comes from the Greek πίτυρον "bran". Classification
Types include: 

Pityriasis alba
Pityriasis lichenoides chronica
Pityriasis lichenoides et varioliformis acuta
Pityriasis rosea
Pityriasis circinata
Pityriasis rubra pilaris
Pityriasis versicolor
Dandruff, historically called Pityriasis capitis
Pityriasis amiantacea

See also
Desquamation
List of cutaneous conditions

References


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