Figure 3

Hand-powered compressor. The hand-cranked version of the HPN is a sealed unit that can be operated by a health worker on a table-top. The pneumatic configuration which was given in Figure 1 is not shown, but is similar to that in Figure 2. The gray disk to the right houses the filter for the nebulizer mouthpiece and the adaptor on the left is connected to the neublizer mouthpiece. The hand crank on the right can be cranked in either direction by someone other than the patient. The hand cranked design emerged through conversations with health workers who desired a device that could be more readily transported. Additionally, a table-top device was preferred over a device operated on the floor. In many regions of the world people grind corn with hand operated mills of a similar design. This device can be carried in a backpack with room for supplies.