Non-invasive Brain Pressure Monitoring After Trauma or Hemorrhage

NCT02172703 | Completed

• 1 other identifier: aICP_CH_TBI_SAH
• Study Type: interventional
• Target: 11
• Locations: 1 country
• Sites: 1

Brief Summary

Introduction: Increased intracranial pressure (ICP) is considered to be the most important intracranial mechanism causing secondary injury in patients admitted after acute traumatic brain injury (TBI) and intracranial haemorrhage (ICB) including subarachnoid haemorrhage (SAH). Currently, ICP can be measured and monitored only using invasive techniques. The two ICP measurement methods available - intraventricular and intraparenchymal - require both a neurosurgical procedure in order to implant the catheter and probes within the brain. The invasiveness of current methods for ICP measurement limits the diagnoses reliability of many neurological conditions in which intracranial hypertension is a treatable adverse event. A reliable, accurate and precise non-invasive method to measure ICP would be of considerable clinical value, enabling ICP measurement without the need of a surgical intervention. Aim: The aim of this study is to validate a novel non-invasive ICP measurement device by comparing its measurement with the "gold standard" invasive ICP-measurement by intracranial probe. The device used in this study has been been developed in the Telematic Science Laboratory at the Kaunas University of Technology, Lithuania. Methods: The non-invasive ICP measurement method will be assessed prospectively using repeatable simultaneous non-invasive and invasive (standard with intracranial probe) ICP measurements on patients presenting with TBI and SAH. The device method is based on two-depth transcranial doppler (TCD) technique for simultaneously measuring flow velocities in the intracranial and extracranial segments of the ophthalmic artery (OA). The intracranial segment of the OA is compressed by ICP and the extracranial segment of the OA is compressed by the pressure Pe externally applied by the device. Two-depth TCD device is used as an accurate indicator of the balance point (Pe = ICP) when the measured parameters of blood flow velocity waveforms in the intracranial and extracranial segments of OA are identical. The device has the same ultrasound transmission parameters as existing TCD devices and meets all patient safety criteria.

Conditions

Traumatic Brain Injury (TBI); Subarachnoid Hemorrhage (SAH)

Keywords

TBI; SAH; ICP; non invasive measurement

Outcome Measures

Primary Outcomes (1)

• Simultaneously measured non-invasive and invasive ICP values in mmHg (millimeters of mercury)

  Physiological parameters of TBI or SAH patients of primary interest are simultaneously measured paired non-invasive and invasive ICP values. New measurement is only initiated if ICP changes for more than 4mmHg in comparison to proceeding measurement.

  Max. 3 times/day - approx. 24hours to 30 days after addmission (as long as patient is monitored with invasive ICPprobe)

Study Arms (1)

Non-invasive ICP measurement

OTHER

non-invasive ICP measurement with NON-INVASIVE ICP ABSOLUTE VALUE METER (carried out simultainusly with standard invasive ICP measurement catheter and probes)

Device: Non-invasive ICP measurement device

Interventions

Non-invasive ICP measurement device DEVICE

The non-invasive ICP measurement device used in this study has been developed in the Telematic Science Laboratory at the Kaunas University of Technology, Lithuania. The non-invasive method is based on two-depth TCD technique for simultaneously measuring flow velocities in the intracranial and extracranial segments of the ophthalmic artery (OA).

Also known as: NON-INVASIVE ICP ABSOLUTE VALUE METER, (Vittamed 205)

Non-invasive ICP measurement

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Adult patients, age ≥ 18 years, admitted after TBI or SAH at the Neurosurgical Department, Kantonsspital Aarau, Switzerland.
• Patients under sedation and ICP monitoring
• Informed consent will be obtained from the relatives prior to initiation of the measurements.

You may not qualify if:

• Age \< 18 years at study entry.
• Patients with wounds, scars including the front orbital region.
• Perforating or penetrating mechanism of TBI
• Patients with orbital injury or abnormal blood flow in both Ophthalmic Arteries
• Patients with previous retina surgery
• Patients with previous cataract surgery
• Patients with any known ocular condition that may be worsened by sustained eye pressure in the opinion of the subject's ophthalmologist
• Patients with radiological signs of calcification or atheromatose plaques in the internal carotid artery detected by CT or angiography (performed prior and independently of the study)

Sponsors & Collaborators

• Javier Fandino, MD: lead
• Kaunas University of Technology: collaborator

Study Sites (1)

Kantonsspital Aarau, Department of Neurosurgery

Aarau, Canton of Aargau, 5001, Switzerland

Location

MeSH Terms

Conditions

Brain Injuries, Traumatic; Subarachnoid Hemorrhage

Condition Hierarchy (Ancestors)

Brain Injuries; Brain Diseases; Central Nervous System Diseases; Nervous System Diseases; Craniocerebral Trauma; Trauma, Nervous System; Wounds and Injuries; Intracranial Hemorrhages; Cerebrovascular Disorders; Vascular Diseases; Cardiovascular Diseases; Hemorrhage; Pathologic Processes; Pathological Conditions, Signs and Symptoms

Study Officials

• Javier Fandino, M.D.

  Department of Neurosurgery, Kantonsspital Aarau, Aarau, Switzerland

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NA
• Masking: NONE
• Purpose: DIAGNOSTIC
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: SPONSOR INVESTIGATOR
• PI Title: Chairman, Department of Neurosurgery

Study Record Dates

• First Submitted: June 10, 2014
• First Posted: June 24, 2014
• Study Start: February 1, 2014
• Primary Completion: July 1, 2015
• Study Completion: July 1, 2015
• Last Updated: July 8, 2015

Record last verified: 2015-07

Locations

CH (1)