Segmentation by type classifies instruments into Ultrasound‑based, Transcranial Doppler (TCD)‑based, Optical‑based, and Bioimpedance‑based systems, each contributing distinct value propositions to the market. Ultrasound‑based monitors, leveraging cranial bone windows, dominate the high‑end segment due to their quantitative accuracy and integration with existing imaging workflows, capturing approximately 40% of market sales. TCD‑based devices, which assess blood flow velocity as a surrogate for ICP, hold a 30% share, favored for their lower cost and established clinical familiarity. Optical‑based monitors, employing near‑infrared spectroscopy to infer cerebral blood volume changes, account for roughly 20% of revenue, driven by advancements in sensor mini‑aturization and non‑contact operation. Bioimpedance‑based instruments, measuring tissue resistance variations, occupy the remaining 10%, primarily in niche research and early‑adoption clinical trials. This type‑level taxonomy clarifies how technological differentiation influences pricing, adoption rates, and ultimately the overall market footprint.