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Pathological Findings of Donor Vessels in Bypass Surgery
Yohei Nounaka1, Yasuo Murai1, Asami Kubota1
1Department of Neurological Surgery, Nippon Medical School Hospital, Tokyo 113-8603, Japan.
Insights
This study histologically evaluated donor vessels for cerebral revascularization. Donor vessel pathology did not significantly differ by disease, though hypertension correlated with atherosclerosis.
Area of Science:
- Vascular Surgery
- Neurology
- Pathology
Background:
- Cerebral revascularization is crucial for intracranial arterial stenosis from moyamoya disease, atherosclerosis, or aneurysms.
- Histological evaluation of donor vessels across different diseases is lacking.
- Various donor harvesting methods exist, but their pathological impact requires investigation.
Purpose of the Study:
- To conduct the first histological evaluation of donor vessels used for cerebral revascularization.
- To compare pathological findings in donor vessels based on the underlying disease (aneurysm, atherosclerosis, moyamoya disease).
- To assess the relationship between patient factors and donor vessel pathology.
Main Methods:
- Analysis of pathological findings in harvested superficial temporal artery, radial artery, occipital artery, and saphenous vein.
- Classification of patients by disease: aneurysm, atherosclerosis, and moyamoya disease.
- Assessment of donor vessel abnormalities, patient history, demographics, and anastomosis patency.
Main Results:
- 98 donor vessels were analyzed from patients with a mean age of 57.2.
- Common findings included atherosclerosis (71.4%), dissection (11.2%), and inflammation (10.2%).
- No significant difference in pathological findings was observed between disease groups; hypertension was linked to donor vessel atherosclerosis.
Conclusions:
- This study provides the first histological comparison of donor vessels across different neurosurgical conditions.
- Vascular dissection rates were similar across disease groups, suggesting surgical manipulation impact is consistent.
- Donor vessel quality is crucial for successful cerebral revascularization, irrespective of the specific disease etiology.
Abstract:
(1) Background Cerebral revascularization is necessary to treat intracranial arterial stenosis caused by moyamoya disease, atherosclerosis, or large complex aneurysms. Although various donor vascular harvesting methods have been reported safe, there are no reports on the histological evaluation of donor vessels for each disease, despite the variety of diseases wherein vascular anastomosis is required. (2) Methods Pathological findings of the superficial temporal artery (STA), radial artery (RA), occipital artery (OA), and saphenous vein (SV) harvested at the institution were analyzed. Patients classified according to aneurysm, atherosclerosis, and moyamoya disease were assessed for pathological abnormalities, medical history, age, sex, smoking, and postoperative anastomosis patency. (3) Results There were 38 cases of atherosclerosis, 15 cases of moyamoya disease, and 30 cases of aneurysm in 98 donor vessels (mean age 57.2) taken after 2006. Of the 84 STA, 11 RA, 2 OA, and 1 SV arteries that were harvested, 71.4% had atherosclerosis, 11.2% had dissection, and 10.2% had inflammation. There was no significant difference in the proportion of pathological findings according to the disease. A history of hypertension is associated with atherosclerosis in donor vessels. (4) Conclusions This is the first study to histologically evaluate the pathological findings of donor vessels according to disease. The proportion of dissection findings indicative of vascular damage due to surgical manipulation was not statistically different between the different conditions.
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