Hyperbaric Oxygen Therapy for Prodromal Alzheimer´s Disease With Cerebrovascular Disease

  • End date
    Mar 10, 2025
  • participants needed
  • sponsor
    Assaf-Harofeh Medical Center
Updated on 10 August 2022


Alzheimer´s disease is a devastating illness that effects the patients as well as their family members. Its prevalence increases exponentially and the burden on the healthcare system is enormous. AD neuropathology begins 15-20 years before the occurrence of cognitive symptoms, which ranges from preclinical stage to mild cognitive impairment (MCI) to dementia. Prodromal AD is an early stage of the disease which is characterized by positive biomarkers and MCI. To this day, there is no medication that can cure or halt the progression of the disease and most studies focus on finding reversible risk factors and changing their influence. Several aetiologies have been proposed, like the deposition of amyloid and tau proteins, neuroinflammation and cerebral ischemia due to cerebrovascular factors. The Amyloid deposition, which serves as the biological marker of AD, was originally thought to be the main cause of the disease, however, recent data suggests that it is not the cause and that it might actually has a protective role. On the other hand, it is known today that vascular changes with related tissue ischemia and neuroinflammation have a crucial role in the development of AD in many patients. These pathologies, ischemia & neuroinflammation, can be improved by the use of hyperbaric oxygen therapy (HBOT). The goal of this study is to explore the potential beneficial effect of HBOT on prodromal AD.


Alzheimer disease is characterised by cognitive, mental and functional disability that is expected to progress until the patient is fully dependent on others for activities of daily living. The pathology begins many years until the cognitive symptoms appear. Prodromal Alzheimer's disease is a state where a person has mild cognitive impairment and Amyloid deposition, which is seen on brain Amyloid PET or in lumbar puncture.

To date, there has been neither a cure nor a therapy that can significantly halt or relieve symptoms for most patients.

This study offers a new biological therapeutic approach aimed to induce neuroplasticity and improve neurological and cognitive functions. Pre -clinical as well as clinical data indicate that HBOT can be beneficial for those patients who suffer from MCI due to Alzheimer's disease and also to patients with cerebral vascular disease.

HBOT is a well-known treatment used in clinical practice for other indications and is considered to be safe with relative rare mild and reversible side effect .The study is designed as a prospective, randomized, sham controlled double blinded study.

Subjects will be enrolled up to a total of 100 subjects, age 60-85, diagnosed with MCI and positive Amyloid PET and vascular changes on brain MRI.

Eligible patients will be randomized to the two study groups at a ratio of 6:6 (in clusters of 6 patients). The HBOT/sham treatment includes 60 daily sessions of 90 minutes each, five days per week. After the treatment period, there will be a maintenance period of HBOT/sham sessions twice a week for 6 months. All assessments with be done on baseline, after the treatment period and after the maintenance period.

The primary endpoint includes improvement in cognitive scores in neurocognitive evaluations (Neurotrax). Secondary and tertiary endpoints include changes in cognitive, physiological, physical, imaging, lab tests and self report questionaires.

Condition Prodromal Alzheimer's Disease, Cerebral Vascular Disorder, Mild Cognitive Impairment, Vascular Cognitive Impairment
Treatment SHAM, Hyperbaric oxygen therapy
Clinical Study IdentifierNCT05349318
SponsorAssaf-Harofeh Medical Center
Last Modified on10 August 2022


Yes No Not Sure

Inclusion Criteria

Diagnosis of Mild cognitive impairment (MCI) due to AD or mixed AD and vascular dementia pathology
MMSE score of 20 and above
Stable psychological and pharmacological treatment for more than three months prior to inclusion
Caregiver that is seeing the patient at least twice per week and is willing to participate and accompany the patient and fill questionnaires
Subject willing and able to read, understand and sign an informed consent

Exclusion Criteria

Inability to attend scheduled clinic visits and/or comply with the study protocol
History of traumatic brain injury, brain tumors, brain surgery, chronic subdural haemorrhages, Epilepsy
Active malignancy
Substance use at baseline, except for prescribed cannabis if vaporized or taken PO as tincture
History of other neurodegenerative diseases including Parkinson's disease (PD), Lewy body dementia (LBD), Frontotemporal dementia (FTD), Multiple sclerosis (MS), Amyotrophic lateral sclerosis (ALS), Creutzfeld Jacob disease (CJD), Multisystem atrophy (MSA), Pseudobulbar palsy (PSP), Corticobasal degeneration (CBD), Wernicke Korsakoff syndrome
Chronic use of medications that may compromise cognitive function and cannot be stopped: Anticonvulsants, Anticholinergics, antiparkinsonian, corticosteroids, Benzodiazepines
Moderate to severe sleep apnea with no use of CPAP
Diagnosis of a psychiatric disorder including: major depression, schizophrenia, bipolar disorder
Serious suicidal ideation
Renal or liver insufficiency, electrolyte imbalances
Chronic heart failure with ejection fraction of 35 or less
HBOT for any reason prior to study enrolment
Chest pathology incompatible with pressure changes (including active asthma or COPD)
Ear or Sinus pathology incompatible with pressure changes (above 3 otolaryngologist visits a year)
An inability to perform an awake brain MRI or Amyloid PET
An inability to perform computerized cognitive tests (Neurotrax)
MMSE score below 20
No evidence of amyloid in the brain PET
No evidence of vascular related lesions in the brain MRI
Active smoking
Participation in another study
Clear my responses

How to participate?

Step 1 Connect with a study center
What happens next?
  • You can expect the study team to contact you via email or phone in the next few days.
  • Sign up as volunteer to help accelerate the development of new treatments and to get notified about similar trials.

You are contacting

Investigator Avatar

Primary Contact



Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

Learn more

If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

Learn more

Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

Learn more

Similar trials to consider


Not finding what you're looking for?

Every year hundreds of thousands of volunteers step forward to participate in research. Sign up as a volunteer and receive email notifications when clinical trials are posted in the medical category of interest to you.

Sign up as volunteer

user name

Added by • 



Reply by • Private

Lorem ipsum dolor sit amet consectetur, adipisicing elit. Ipsa vel nobis alias. Quae eveniet velit voluptate quo doloribus maxime et dicta in sequi, corporis quod. Ea, dolor eius? Dolore, vel!

  The passcode will expire in None.

No annotations made yet

Add a private note
  • abc Select a piece of text from the left.
  • Add notes visible only to you.
  • Send it to people through a passcode protected link.
Add a private note