Bladder sphincter dyssynergia

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Fig. 1 urodynamic trace of detrusor sphincter dyssynergia .
Fig. 1 urodynamic trace of detrusor sphincter dyssynergia .

Bladder sphincter dyssynergia or more correctly detrusor sphincter dyssynergia (DSD) is a consequence of a neurological condition such as spinal injury or multiple sclerosis (MS) whereby the micturition reflex is disordered. Instead of the urethra relaxing completely during voiding it dyssynergically contracts causing the flow to be interrupted and the detrusor pressure to rise.

Striclty DSD can only be diagnosed from an EMG trace or x-ray findings, but the trace in the image shows both the pressure and flow phenomena mentioned.

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