Related Experiment Video
Updated: Jul 29, 2026
11:39
Non-invasive Optical Measurement of Cerebral Metabolism and Hemodynamics in Infants
Published on: March 14, 2013
Cerebral oxygenation and the recoverable brain
1Ocean Hyperbaric Center, Lauderdale by the Sea, FL 33308, USA.
Neurological Research
|May 19, 1998
Summary
Severe ischemia can cause brain cell death, but some cells survive in the ischemic penumbra. Hyperbaric oxygen therapy can reoxygenate these dormant cells, improving brain function and metabolism.
Area of Science:
- Neurology
- Physiology
- Medical Imaging
Background:
- Severe ischemia leads to reduced oxygen availability, causing cellular damage and potentially necrosis.
- The ischemic penumbra represents a zone of viable but functionally impaired brain tissue surrounding an ischemic core.
- Understanding the penumbra is crucial for developing effective therapeutic strategies for ischemic stroke.
Observation:
- SPECT imaging under hyperbaric conditions demonstrated the existence of the ischemic penumbra.
- High plasma oxygen concentration under hyperbaric conditions served as a tracer in SPECT imaging.
- This imaging technique revealed recoverable brain tissue in patients with ischemic conditions.
Findings:
- Hyperbaric oxygen therapy improved cerebral blood flow and metabolism in patients.
- SPECT imaging identified viable but dormant neurons in the ischemic penumbra.
- Increased cerebral oxygenation under hyperbaric conditions correlated with clinical improvement.
Implications:
- Hyperbaric oxygen therapy offers a potential treatment for reversing neuronal dormancy in ischemic conditions.
- SPECT imaging can identify patients who may benefit from hyperbaric oxygen therapy.
- This approach may lead to improved clinical outcomes and functional recovery after ischemic events.
Related Concept Videos
01:17Assessment of Diffusion and Perfusion
Understanding and evaluating diffusion and perfusion is critical in assessing a patient's respiratory and circulatory health. These processes play key roles in maintaining the body's internal environment, ensuring that tissues receive adequate oxygen while waste products are efficiently removed.
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this principle...
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this principle...
01:15Ischemic Stroke ll: Pathophysiology
An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...