Final Design

The final design fulfills the goal of creating a universal, single use adapter for thoracic lavage that is easier and faster to use than makeshift solutions currently found in emergency rooms. Our final prototype successfully addressed the two biggest issues with the current procedure: it provided a standardized Luer lock connection to link IV tubing directly to chest tubes, and the integrated 3-way valve eliminated the need for a second chest tube incision.

The final design features a Luer lock on the top of the adapter to connect to the IV tubing and barbed adapter ends for a secure grip onto the chest tube and waste bag suction tube. In the middle of the adapter is a press-fit 3-way rotary valve that allows for control of fluid flow direction.  

Testing confirmed that the Polyjet-printed adapter met the most critical performance requirements. It was able to produce a flow rate of 150 mL/min that was very similar to the 175 mL/min of flow rate without the adapter. The barbed connections proved to be very secure, withstanding an additional 5 N of pull force more than connections without barbs. No leakage was observed during the simulated tests when a Polyjet-printed valve was also used.

Ultimately, this adapter offers a more reliable and efficient way to treat severe hypothermia, potentially saving lives by reducing setup time and allowing doctors to perform chest compressions without interference.