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DUCT DEPENDENT LESIONS

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DUCT DEPENDENT LESIONS ARE CONDITIONS NEEDING PDA PATENCY FOR THE SURVIVAL OF THE CHILD. THESE ARE OF 3 TYPES: THE 1ST AND 2ND TYPES ARE DUCT DEPENDENT SYSTEMIC AND PULMONARY CIRCULATIONS RESPECTIVELY WHICH HAVE BEEN WELL EXPLAINED EVERYWHERE IN ALL TEXT BOOKS. ANOTHER TYPE IS THE 3RD TYPE ARE DUCT DEPENDENT LESIONS WHICH NEEDS PATENCY OF DUCT FOR MIXING OF BLOOD SO THAT THE CHILD SURVIVES LIKE TGA WITH INTACT INTERVENTRICULAR SEPTUM. IN THIS PDA WILL HELP THE MIXING OF SYSTEMIC AND PULMONARY BLOODS AND ONLY THEN THE NEONATE CAN SURVIVE. THESE DUCT DEPENDENT LESIONS WILL NEED PROSTIN OR PDA STENTING TO MAINTAIN PDA PATENCY TILL FURTHER CORRECTIVE OR PALLIATIVE CAN BE DONE.
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DUCT DEPENDENT LESIONS ARE CONDITIONS NEEDING PDA PATENCY FOR THE SURVIVAL OF THE CHILD. THESE ARE OF 3 TYPES: THE 1ST AND 2ND TYPES ARE DUCT DEPENDENT SYSTEMIC AND PULMONARY CIRCULATIONS RESPECTIVELY WHICH HAVE BEEN WELL EXPLAINED EVERYWHERE IN ALL TEXT BOOKS. ANOTHER TYPE IS THE 3RD TYPE ARE DUCT DEPENDENT LESIONS WHICH NEEDS PATENCY OF DUCT FOR MIXING OF BLOOD SO THAT THE CHILD SURVIVES LIKE TGA WITH INTACT INTERVENTRICULAR SEPTUM. IN THIS PDA WILL HELP THE MIXING OF SYSTEMIC AND PULMONARY BLOODS AND ONLY THEN THE NEONATE CAN SURVIVE. THESE DUCT DEPENDENT LESIONS WILL NEED PROSTIN OR PDA STENTING TO MAINTAIN PDA PATENCY TILL FURTHER CORRECTIVE OR PALLIATIVE CAN BE DONE.
Duct dependent lesions is connection of pulmonary artery to descending aorta. If ductal closure causes significant decrease in systemic circulation the condition is called ductus dependent systemic blood flow. If ductal closure caused significant decrease in pulmonary circulation is called ductus dependent pulmonary blood flow. Pulmonary blood flow: Pulmonary Atresia with or without VSD Critical Pulmonary Stenosis Tricuspid Atresia Tetralogy of Fallot Severe Ebstein'sAnomaly Severe TR Systemic blood flow: Critical Aortic Stenosis Interruption of aortic arch Hypoplastic left heart syndrome
Good elaboration. I would like to clarify a few important points. All tricuspid atresias are not duct dependent and only type 1a and 2a are duct dependent in which there is no forward flow to pa. So this needs to be specified. Second point we should not say tof to be a duct dependent lesion unless it's pul atresia tof or a pinpoint ps. All other causes are well elaborated by u. There is also a 3rd set of duct dependent lesions. Can u enumerate them?
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Duct dependent congenital heart disease are dependent on blood flow through the PDA They include coarctation of aorta, critical aortic stenosis,hypoplastic left heart syndrome, pulmonary atresia, critical pulmonary stenosis, Tricuspid atresia
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These lesions are dependent on blood flow through the PDA for adequate circulation are collectively called Ductal - Dependent lesions. Pt will present with sever cynosis,shock or collapsed.
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