What is another word for plethysmograph?
Pronunciation: [plˈɛθɪsmˌɒɡɹaf] (IPA) 
A plethysmograph is a medical device used to measure changes in volume in a particular area of the body. There are a number of different synonyms that can be used to describe plethysmographs, including pulse oximeter, volume monitor, and volumeter. Other terms that might be used to refer to this type of device include blood flow monitor, perfusion monitor, and blood pressure monitor. Regardless of the term that is used to describe this type of device, the basic principle remains the same: it is used to measure changes in volume in order to assess blood flow or pressure in a particular part of the body.
