Recruitment temporarily held for site retraining

Invasive intracranial pressure (ICP) monitoring is highly effective, but involves risks. HS-1000 measures ICP non-invasively by assessing the acoustic properties of the patient's head.

HS-1000 device, a proprietary non-invasive ICP monitor, is expected to safely and accurately monitor ICP with minimal discomfort to patients, and provide information about normal or elevated ICP levels to the physicians.

A prospective study will be conducted on 80 patients with an inserted invasive intraparenchymal ICP monitor. Once a patient undergoes invasive ICP monitoring, has a life expectancy of greater than 48 hours and is 14 years old and over at the screening visit, and has an intact/continuous dura layer, the patient will become a candidate for enrollment into the study. If the patient signs the informed consent or the patient's legal authorized representative signs on the patient's behalf, the patient will be enrolled into the trial. Each enrolled patient will be monitored in parallel to the invasive ICP monitor with the HeadSense's device. Once the data collection is complete, results will be analyzed by comparing ICP readings from both devices.

The primary end-point of the study is to collect 60-120 minutes of ICP monitoring data over two sessions of 30-60 minutes each for 80 neurosurgery patients of any etiology. The secondary endpoint of this study is evaluate the safety of the device as measured by incidence of adverse events and serious adverse events over each subject's 96 hours of participation.

Inclusion Criteria:

• Male and female subjects, aged 14 years old and over at screening visit
• Patient with invasive ICP monitor due to suspected ICP elevation, regardless of etiology
• Survival expectancy greater than 48 hours
• Subject or legal authorized representative (per local regulation) is able and willing to comply with the requirements of the protocol
• Subject or legal authorized representative (per local regulation) is able to understand and sign written informed consent to participate in the study

Exclusion Criteria:

• Subject with ear disease, ear trauma
• Subject with a punctured or discontinuous dura layer (must be intact)
• Subject with cerebral fluid (CSF) leakage
• Known allergy or hypersensitivity to any of the test materials or contraindication to test materials
• Subjects currently enrolled in or less than 30 days post-participation in other investigational device or drug study(s), or receiving other investigational agent(s)
• Any condition that may jeopardize study participation (e.g., abnormal clinical or laboratory finding) or interpretation of study results, or may impede the ability to obtain informed consent (e.g. mental condition)