When use of this valve was prohibited, the pneumothorax progressively disappeared and never recurred.Ī chest tube functions according to a few basic physical principles related to pressure.
On day 31, the nursing staff noted for the first time that the high negativity relief valve was used to vent excessive negativity. When the child cried, negative pressure went high in the water seal chamber, even reaching the high negativity float valve. 1), necessitating numerous manipulations, changes of tube, increases in suction (up to −30 cm H 2O) and placement of a second tube on postoperative day 31, all without success. From this day on, the pneumothorax was intractable ( Fig. A central venous catheter and a new chest tube were installed under general anesthesia. On day 27, the pleural effusion reappeared, without pneumothorax. The pneumothorax persisted, but on postoperative day 26, the chest tube stopped draining and was removed. A small pneumothorax was apparent on the subsequent chest film, and the system was connected to suction (−10 cm H 2O). The tube was connected to an underwater chest drainage system (Pleurevac A-6020 Genzyme, Fall River, Mass.). When oral alimentation was resumed, a right chylothorax developed, for which a chest tube was inserted 21 days postoperatively. A 4-month-old infant underwent resection of a huge mediastinal lymphangioma through a median sternotomy.
0 kommentar(er)
