NeuroDx Development is a medical device company focusing on the neurosurgical market. It offers ShuntCheck, a portable, non-invasive, non-radiologic tool for testing the patency of CSF (cerebrospinal fluid) shunts in hydrocephalus patients. The ShuntCheck system consists of three components: a ShuntCheck thermosensor (which monitors skin temperature), a Data Acquisition Unit (which converts the sensor signal into digital format), and a battery‐powered computer running ShuntCheck software.