A pilot clinical study to estimate intracranial pressure utilising cerebral photoplethysmograms in traumatic brain injury patients.

"Declarations Ethics approvalThis study was performed in line with the principles of the Declaration of Helsinki. Approval was granted by the East of England – Cambridge Central Research Ethics Committee on 14/02/19 (REC reference 18/EE/0276, IRAS ID 219476). Consent to participateInformed consent was obtained from all individual participants included in the study. Consent for publicationNo consent was required for the use of patient photographs that have been deidentified (Fig. 1a). No identifying information was included in this article. Conflict of interestThe authors declare no competing interests. Conflict of interest The authors declare no competing interests."

"Funding The project is funded by the National Institute for Health Research (NIHR) [Invention for Innovation (i4i) Product Development (Grant Reference Number II-LA-0216–20005)]. The views expressed are those of the authors and not necessarily those of the NIHR or the Department of Health and Social Care."

"Trial registration NCT05632302, 11th November 2022, retrospectively registered."