Drooling in Parkinson's disease: a novel speech and language therapy intervention

Drooling and difficulty swallowing saliva are commonly reported in people with Parkinson's disease (PD). Drooling in PD is the result of swallowing difficulties rather than excessive saliva production. Currently, there is little research into the effectiveness of treatments to reduce drooling. The aims of the study were to develop objective measures of saliva volume and drooling for PD and to assess the efficacy of two therapeutic strategies to control drooling, i.e. specific speech and language therapy (SLT) including a portable metronome brooch to cue swallowing and injections of botulinum toxin into both parotid glands to reduce the amount of saliva produced. This paper will describe the assessments used, including the measurement of saliva, swallowing and drooling. The main focus will be the strategies used in the SLT intervention. The preliminary results are presented.