Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in semi-upright position . Comparison is made with the next preceding similar study obtained one hour earlier during the same day . During the latest interval , a right - sided pigtail - end drainage catheter has been placed apparently approached through the lateral lower chest wall at the level of the seventh or eighth intercostal space . The pig - tail end of the line is overlying the medial portion of the right diaphragm , but it can not be identified if anterior or posterior on this single - view examination . Also , impossible to decide on the single - view examination if a sharp kink in the line at the site of the entrance makes a shallow or tight loop which possibly could impair flow . Evidence of previously described moderate - sized pneumothorax persists and likewise extensive chest wall emphysema is present bilaterally , extending into the lower neck region . Referring physician , ___ , was paged at 1 :20 p .m .
    OUTPUT:
    
Persistent pneumothorax . Pigtail drainage catheter advanced into the lower diaphragmatic pleural space , but questionable function .