Oxygen Flow Rate Splitter

grabcad

Pretty sure this one fills the brief. It uses existing Nasal Cannulas. The cannula connection end is threaded through the square slide and then pushed onto the barb at the top of the Oxygen Flow Splitter. This is done for both sides. The slide is then forced past the closed position on the carriages. The Flow Splitter can then be fitted to the Oxygen Regulator. The slides will squeeze the cannula to restrict the flow and can be regulated to flow rates via the embossed numbers along the slide carriages. The small grooves on the slide and the back of the carriage plus the expansion pressure of the tubing will keep the slides in position. Set the Oxygen regulator to the sum of the desired flow rate of both patient requirements and then set the splitter slides to suit, e.g. one patient requires 4 l/m and the other requires 3 l/m, set the Oxygen regulator to 7 l/m and the slides to 3 & 4 l/m respectively. The range of flow is from full open to full closed in 1 litre/minute increments. The hooks on the side can be used as storage for the cannulas when not being used. No chance of oxygen leakage as there are no breaks in the line from regulator to patient. Footprint is 137 mm x 140 mm x 33 mm. Can be easily 3D printed and main carriage body is hollow to reduce print time, weight and material expense. Total weight of assembly without the cannulas is approximately 60 grams (2 oz)