- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05594056
Transorbital Ultrasound of Optic Nerve Sheath Diameter Between Healthy Pregnant Women and Those With Severe Preeclampsia.
Transorbital Ultrasound Measurement of Optic Nerve Sheath Diameter Between Pregnant Women With Severe Preeclampsia and Normal Gestations. Prospective, Controlled Trial.
The neurological alterations associated with preeclampsia depend on cerebral autoregulation, a theory that outlines the mechanisms by which the nervous system controls cerebral perfusion. However, with the loss of autoregulation, increased blood flow, edema and eventually increased intracranial pressure are triggered and may be translated into neurological manifestations such as symptoms of vasospasm, one of the criteria for severity in preeclampsia.
Nervous system manifestations frequently found in preeclampsia are headache, blurred vision, scotomas and hyperreflexia. Although uncommon, temporary blindness (lasting a few hours to a week) may also accompany severe preeclampsia and eclampsia.
The optic nerve, as part of the central nervous system, is surrounded by cerebrospinal fluid and dura mater, which forms the optic nerve sheath. Due to the connection with the intracranial subarachnoid space, the diameter of the optic nerve sheath is influenced by variations in cerebrospinal fluid pressure. Increased intracranial pressure is transmitted to the subarachnoid space surrounding the optic nerve, causing its expansion.
Recent studies suggest that an optic nerve sheath diameter greater than 5 mm correlates 100% with ICP (intracerebral pressure) greater than 20 mm Hg. Due to the simple nature of the test and the limited time required to perform it, it is an ideal non-invasive test to assess changes in mental status, severe headache, and to take the necessary measures aimed at reducing intracranial pressure.
The diagnosis of elevated intracranial pressure is challenging and critical, because early recognition and treatment are essential to prevent brain damage or death since preeclampsia with severe data remains one of the most frequent complications in our institution.
These values are not taken from the obstetric population, so this study proposes the description of a standard value for the pregnant population. There are few studies that describe a value to help us define cases of this pathology and correlate it with the signs and symptoms of severity in patients with preeclampsia.
Study Overview
Status
Conditions
Intervention / Treatment
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Juan Carlos Ruiz, MD
- Phone Number: 60477240
- Email: ju_cr20@hotmail.com
Study Contact Backup
- Name: Adriana Martinz, MD
- Phone Number: 64802549
- Email: amartinzmd@gmail.com
Study Locations
-
-
-
Panama, Panama
- Saint Thomas H
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Age between 15-44 years.
- Gestational age between 34-40 weeks of gestation.
Exclusion Criteria:
- Eye disease (Glaucoma, diabetic neuropathy, optic neuritis).
- Nervous disorders.
- Psychiatric disorders
- Diabetes
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Diagnostic
- Allocation: Non-Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Preeclampsia
Patients with severe preeclampsia and gestational age between 34-40 weeks.
|
Measurement of the optic nerve sheet with a linear transducer (7,5 MHz).
|
Active Comparator: Control
Patients with normal gestations between 34-40 weeks.
|
Measurement of the optic nerve sheet with a linear transducer (7,5 MHz).
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Optic nerve sheet measurement
Time Frame: 24 hours
|
The diameter of the optic nerve sheath was measured three millimeters behind the eyeball, and one axis perpendicular to the optic nerve.
Three measurements were taken in each eye.
The resulting six measurements were averaged to give a mean of the optic nerve sheet measurement, to minimize measurement variability.
|
24 hours
|
Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 2022-600
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
Clinical Trials on Preeclampsia Severe
-
University Medical Centre LjubljanaCompletedPreeclampsia Postpartum | Preeclampsia SevereSlovenia
-
MemorialCare Health SystemNot yet recruitingPreeclampsia | Preeclampsia Postpartum | Preeclampsia Severe | Preeclampsia Mild
-
AMAG Pharmaceuticals, Inc.TerminatedSevere PreeclampsiaUnited States, Poland, South Africa
-
Mpilo Central HospitalCompletedSevere PreeclampsiaZimbabwe
-
Instituto Materno Infantil Prof. Fernando FigueiraCompletedSevere PreeclampsiaBrazil
-
Corniche HospitalCompletedPreeclampsia SevereUnited Arab Emirates
-
Hopital Antoine BeclereUnknownPreeclampsia SevereFrance
-
Peking University Third HospitalBeijing Forestry universityEnrolling by invitation
-
Ain Shams UniversityUnknown
-
Cairo UniversityUnknown
Clinical Trials on Transorbital ultrasound of the optic nerve sheet
-
University Hospital PilsenUniversity Hospital Olomouc; Na Homolce HospitalRecruiting
-
Istanbul UniversityCompletedOptic Nerve Sheath Diameter
-
Poitiers University HospitalCompleted
-
University Medical Centre MariborRecruitingCardiac Disease | Cardiac Valve DiseaseSlovenia
-
Hopital du Sacre-Coeur de MontrealNot yet recruitingOptic Neuropathy, Ischemic | Anterior Ischemic Optic Neuropathy | Giant Cell ArteritisCanada
-
University of MichiganDon Massey FoundationCompletedTraumatic Brain Injury | Intracranial Hypertension | Acute Brain InjuriesUnited States
-
National Heart Institute, EgyptCompletedIntracranial HypertensionEgypt
-
University of MichiganAll India Institute of Medical Sciences, New Delhi; National Institutes of... and other collaboratorsCompletedTraumatic Brain Injury | Intracranial HypertensionIndia
-
SMG-SNU Boramae Medical CenterUnknown
-
Zagazig UniversityRecruiting