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[Pressure-and flow measurements during carotid-subclavian-bypass operations (author's transl)]
Thoraxchirurgie, Vaskulare Chirurgie
|August 1, 1977
Insights
Carotid-subclavian bypass surgery can cause reduced carotid artery flow, termed "pseudosteal." This phenomenon occurs due to altered blood flow in healthy collateral vessels, with no observed neurological complications in patients.
Area of Science:
- Vascular Surgery
- Cerebrovascular Physiology
Context:
- Carotid-subclavian bypass (CSB) is a surgical procedure to restore blood flow to the head and neck.
- Assessing hemodynamic changes post-CSB is crucial for patient outcomes.
Purpose:
- To investigate pressure and blood flow dynamics in the common carotid artery following CSB operations.
- To understand the physiological basis of observed flow changes.
Summary:
- Hemodynamic monitoring was performed during 7 CSB operations.
- Four patients exhibited reduced common carotid artery flow post-bypass.
- This reduction was attributed to a "pseudosteal" effect, where blood flow is diverted through well-functioning collaterals.
Impact:
- The study clarifies a potential hemodynamic consequence of CSB, the "pseudosteal" phenomenon.
- Findings indicate that reduced carotid flow post-CSB may not lead to neurological complications.
- Highlights the importance of evaluating collateral circulation in cerebrovascular surgery.
Abstract:
In 7 Carotid-Subclavian-Bypass operations pressure and blood-flow were studied. In 4 patients a reduced flow in the common carotid artery was noticed after opening the bypass. There were no neurological complications in the postoperative period in any patient. This decreased flow can be explained as a so-called "pseudosteal" due to changing in direction of flow in numerous and good functioning collaterals of this area.