Cystometry

The image below shows rectal cancellation working badly but Detrusor Instability is still diagnosed
 
 

The three coughs in the first half of the trace are recorded very unfaithfully on the rectal channel.
Usually this is a result of air in the system and is cured fairly easily by flushing the lines
and transducer dome. However, damping might only apply to high frequencies. If the damped rectal is responding well to low frequencies such as bodliy movement might produce, there us no problem being sure about the diagnosis of detrusor Instability based on the contraction at the right
 
Click here to see 
rectal cancellation 
working well
Click here to see 
rectal cancellation 
working well but with 
rectal contractions
which can confuse
Click here to see 
rectal cancellation 
working badly


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