[Intracranial Pressure Evaluation by Ophthalmologist].

Area of Science:

• Ophthalmology and Neurology
• Medical Diagnostics
• Non-invasive Pressure Measurement

Background:

• Direct measurement of intracranial pressure (ICT) is accurate but invasive, carrying risks of infection and tissue damage.
• Indirect methods like Transcranial Doppler ultrasonography (TDU) and Digital Ophthalmodynamometry (D-ODM) are used for ICT estimation.
• D-ODM measures Venous Pulsation Pressure (VPT), a physiological indicator related to ICT and intraorbital pressure.

Purpose of the Study:

• To evaluate the utility of Digital Ophthalmodynamometry (D-ODM) as a non-invasive method for assessing intracranial pressure (ICT).
• To explore the application of D-ODM in diagnosing various neurological and ocular conditions associated with abnormal ICT.
• To compare D-ODM with existing indirect methods for ICT measurement.

Main Methods:

• D-ODM measures Venous Pulsation Pressure (VPT) by analyzing pulse phenomena.
• ICT is approximated using mathematical formulas involving VPT, intraocular pressure (VOT), pulsatility index (PI), Body Mass Index (BMI), and other physiological parameters.
• Normal VPT values are below 15 torr; increased ICT risk is associated with values above 20 torr.

Main Results:

• D-ODM provides an indirect, non-invasive estimation of intracranial pressure (ICT).
• Calculations for approximate ICT are derived from VPT and other measurable parameters.
• Physiological relationships between VPT, ICT, and intraocular pressure are described.

Conclusions:

• D-ODM serves as a valuable screening tool for conditions such as hydrocephalus, brain tumors, cerebral hemorrhage, glaucoma, and optic neuropathy.
• It is suitable for immediate ICT evaluation but not for continuous monitoring.
• D-ODM is recommended for patients suspected of having elevated ICT due to its repeatable nature and non-invasive profile.