A demonstration of the range of motion test, performed with the device, a syringe and needle, a basin of water, and a latex surgical glove. The basin was held at an angle so that the syringe could be held horizontally, which is the orientation closest to the clinical setting.
Test Description
This test ensured that the device permitted drawing sufficient fluid with one smooth, comfortable motion. Five subjects were given the device, attached to a 1 mL syringe with a needle, and a properly fitted latex glove. The subjects were instructed to draw water for as long as comfortably possible. Afterwards, the total volume of water in the syringe and the distance that the plunger moved was measured. This was repeated five times per subject.
Results
Both test results exceeded their requirements. Subjects were able to draw over 0.35 mL of water on average, which was above the required 0.3 mL of fluid extracted during anterior chamber paracentesis. Similarly, subjects were able to move the plunger back far enough to draw sufficient fluid, even with the minimal volumes of air drawn during every use.