The Use of Near Infrared Spectroscopy (NIRS) to Estimate Intracranial Pressure (ICP)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01850069
Recruitment Status : Completed
First Posted : May 9, 2013
Last Update Posted : May 7, 2018
Information provided by (Responsible Party):
Bhiken I. Naik, MD, University of Virginia

Brief Summary:
The aim of this study is to determine whether we can predict the intracranial pressure using near infra-red spectroscopy

Condition or disease
Intracranial Hypertension

Detailed Description:

The management of intracranial hypertension requires the presence of an intracranial pressure monitor. We are investigating whether the waveforms obtained from a near infrared spectroscopy device can predict what the intracranial pressure is non-invasively.

  • Patients with intracranial hypertension who are intubated and ventilated in the ICU will be recruited
  • we will record there intracranial pressure and systemic arterial pressure
  • recordings from the near infrared device will be recorded and analysed off-line
  • we will correlate the waveform tracings from near infrared spectroscopy and the arterial tracing

Study Type : Observational
Actual Enrollment : 24 participants
Observational Model: Cohort
Time Perspective: Prospective
Official Title: The Use of Near Infrared Spectroscopy (NIRS) to Estimate Intracranial Pressure (ICP)
Actual Study Start Date : June 2014
Actual Primary Completion Date : January 10, 2017
Actual Study Completion Date : January 10, 2017

Intracranial hypertension
Patients with raised intracranial pressure

Primary Outcome Measures :
  1. Intracranial elastance [ Time Frame: Participants will be followed while an arterial line and intracranial pressure monitor is present duing the ICU admission. This is expected to be an average of 5 days. ]
    Intracranial elastance (δP/δV)will be measured by dividing the pulse pressure of an invasive arterial blood pressure by the amplitude of high frequency oscillations in the near infrared (NIR) absorbance waveforms.

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Ages Eligible for Study:   18 Years to 80 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Patients in the ICU with intracranial hypertension, being monitored with an arterial catheter and intraranial pressure monitor

Inclusion Criteria:

Patients with an intracranial pressure monitor and arterial catheter who are admitted to the ICU

Exclusion Criteria:

Less than 18 years

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01850069

United States, Virginia
University of Virginia
Charlottesville, Virginia, United States, 22908
Sponsors and Collaborators
University of Virginia
Principal Investigator: Bhiken Naik, MBBCh University of Virginia

Responsible Party: Bhiken I. Naik, MD, Assistant Professor, Anesthesiology, University of Virginia Identifier: NCT01850069     History of Changes
Other Study ID Numbers: 16714
First Posted: May 9, 2013    Key Record Dates
Last Update Posted: May 7, 2018
Last Verified: May 2018
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

Keywords provided by Bhiken I. Naik, MD, University of Virginia:
Intracranial hypertension
intracranial elastance

Additional relevant MeSH terms:
Intracranial Hypertension
Vascular Diseases
Cardiovascular Diseases
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases