Figure 4. . An example of slow recovery from carry-over block effect after application of kilohertz frequency alternating current for 2 h.
The PS/DS ratio is the ratio of twitch forces produced by test stimulation proximal and distal to the site of conduction block and is an index of residual nerve block and recovery.
COBE: ‘Carry-over’ block effect; DS: Distal stimulation; KHFAC: Kilohertz frequency alternating current; PS: Proximal stimulation.