In the evacuation of pus from the pleural cavity I have recently adopted a method of drainage which prevents in a great measure the admission of air into the pleural cavity and yet permits the free outflow of pus. The advantage of maintaining a vacuum in the chest cavity is apparent.
The suggestion of Bryant1 of attaching a collapsed rubber bulb to the end of the drainage tube after sealing the chest opening prompted an experiment with the check. The need for irrigation in a recent desperate case of empyema necessitated the adoption of the double tube to secure effective and frequent irrigation, and at the same time it afforded an excellent opportunity for the test.
The rubber tubing may be of any desired size, weight or length and with but a few minutes' work is easily converted into the ideal double current drain known as the Wetherill drainage