Of the common causes for exudative pleural effusions, parapneumonic effusions have the highest diagnostic priority. Even in the face of antibiotic therapy, infected pleural effusions can rapidly coagulate and organize to form fibrous peels that might require surgical decortication.
Retrogradation is the landward change in position of the front of a river delta with time.etrogradation is the landward change in position of the front of a river delta with time.
Antegrade means âin the direction of normal flow,â in urological terms. With no other context, it just means âforward.â Retrograde means the opposite â âagainst the direction of normal flow,â or simply âbackwards.â.tâs an âantegrade urethrogram,â which youâll know by now means a picture of the urethra when urine is flowing the normal way. Of course thatâs exactly what a voiding cystourethrogram is doing. But they needed another name so it wouldnât â you know â be confusing.