No. The Ability can be used on most patients but some will require a more in depth assessment using Doppler and waveform analysis, or toe pressures and Pulse Volume Waveforms.The Ability unit should be used as the first line ABI assessment tool and will work on most patients. This ensures that the majority of patient scan now have a rapid ABI and then patients with PAD or those that cannot be measured should have a Doppler ABI and waveforms recorded.