The HALYARD* Analog Manometer allows a physician to inject fluid into a patient and measure the pressure of the fluid using the manometer. Simplifies provocation discography, providing a precise, simple and cost-effective way of interpreting disc pressure without electronics. Pressure gauge measures fluid pressures over the range of 0-100 psi and is accurate to +/- 5%. Syringe has 2cc graduations and is accurate +/- 2cc when filled to 20cc. Optional 3-Way Stopcock allows filling of syringe with needle attached. Quick-latch mechanism allows the user to release the latch with one hand for ease of use. Plunger can be displaced with the thumb or by rotation for more controlled displacement.