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Real-Time Monitoring of Neurocritical Patients with Diffuse Optical Spectroscopies
Published on: November 19, 2020
[Monitoring during Cerebrovascular Surgery]
Kouichi Misaki1, Kenji Yoshiki, Tomoya Kamide
1Department of Neurosurgery, Kanazawa University.
Insights
Intraoperative monitoring is crucial for cerebrovascular surgery to prevent blood flow complications. It helps assess cerebral blood flow adequacy and detect neurological dysfunction during procedures like bypass and carotid endarterectomy.
Area of Science:
- Neurosurgery
- Neurology
- Vascular Surgery
Context:
- Intraoperative monitoring is essential in direct and endovascular treatments for cerebrovascular disease.
- Procedures like bypass, carotid endarterectomy, and aneurysm clipping require temporary blood flow interruption, necessitating monitoring.
- Understanding patient-specific cerebral circulation changes during blood flow blockade is critical due to variable collateral circulation.
Purpose:
- To prevent complications arising from blood flow disturbances during cerebrovascular surgeries.
- To assess the adequacy of reestablished cerebral blood flow after revascularization procedures.
- To detect emergent neurological dysfunction through changes in monitoring waveforms.
Summary:
- Cerebrovascular monitoring aids in managing risks associated with surgeries that interrupt blood flow, such as bypass and carotid endarterectomy.
- Waveform analysis during surgery can identify neurological dysfunction, even when blood flow is temporarily compromised.
- Monitoring helps determine the cause of malfunction post-surgery, potentially improving outcomes in subsequent interventions.
Impact:
- Enhances patient safety during complex cerebrovascular interventions.
- Facilitates timely intervention to mitigate neurological damage.
- Provides critical data for surgical decision-making and improving future surgical strategies for cerebrovascular disease.
Abstract:
Intraoperative monitoring of cerebrovascular disease is performed in direct surgery and endovascular treatment to prevent complications due to blood flow disturbance. Typical surgeries in which monitoring is useful are revascularization surgeries, such as bypass, carotid endarterectomy, and aneurysm clipping surgery. Revascularization is performed to normalize intracranial and extracranial blood flow but requires interruption of blood flow to the brain, even for a short time. Changes in cerebral circulation and function when blood flow is blocked cannot be generalized because they are affected by collateral circulation and differ among cases. Monitoring is important to understand these changes during surgery. It is also used in revascularization procedures to check if the reestablished cerebral blood flow is adequate. Changes in monitoring waveforms can detect the emergence of neurological dysfunction, but in some cases, clipping surgery can end with missing waveforms, leading to dysfunction. Even in such cases, it can help identify which surgery caused the malfunction and improve the outcome of subsequent surgeries.
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