RESUMO
BACKGROUND: Recent colour duplex studies of patients presenting with venous ulceration in the community have shown that between 55 and 60 per cent have isolated superficial venous insufficiency. Previous studies of the role of superficial surgery in the treatment of venous ulceration have applied postoperative compression bandaging and therefore it has not been possible to determine the role of superficial surgery in promoting ulcer healing. The purpose of this prospective study was, therefore, to examine the healing rate after superficial surgery in patients with isolated superficial venous incompetence and venous ulceration who did not undergo postoperative compression bandaging. METHODS: Patients with isolated superficial venous incompetence, as demonstrated by colour duplex scanning and an ankle : brachial pressure index greater than 0.8, underwent saphenofemoral or saphenopopliteal disconnection under local anaesthesia, or a high tie and strip under general anaesthesia. Compression bandaging was not applied after operation. Patients were followed regularly after surgery and the endpoint was ulcer healing. RESULTS: Between May 1994 and July 1997, 122 legs with venous ulceration and isolated superficial venous incompetence underwent superficial surgery. Ninety-three (76 per cent) had long saphenous incompetence alone, 13 (11 per cent) had short saphenous incompetence alone and 16 (13 per cent) had combined long and short saphenous incompetence. The median (range) patient age was 72 (28-94) years and the median duration of ulceration was 32 weeks (range 2 weeks to 32 years). The median (range) ulcer area was 9 (1-500) cm2. Ninety patients (74 per cent) had a local anaesthetic procedure while 32 (26 per cent) had general anaesthesia. Of patients who had long saphenous surgery, 69 had high ligation only and 24 had high ligation and strip. The healing rate by life-table analysis was 58 per cent at 6 months, 73 per cent at 1 year and 82 per cent at 18 months. Clinical review and colour duplex examination of patients with ulcers that had failed to heal (n = 18) showed that two had recurrent superficial to deep connections; the remainder had fixed ankle joints or severe osteoarthritis of the hip and knee. CONCLUSION: Superficial venous surgery in patients with isolated superficial venous incompetence and venous ulceration can achieve a very high healing rate in the absence of postoperative compression.
RESUMO
BACKGROUND: Symptomatic carotid disease due to thromboembolism has been associated with acute plaque instability and intraplaque haemorrhage. These features may be influenced by the fragility and position of plaque neovessels. The purpose of this study was, therefore, to determine whether any association existed between neovessel density, position, morphology and thromboembolic sequelae. METHODS: Carotid endarterectomy (CEA) samples were collected from 15 asymptomatic patients with greater than 80 per cent stenosis and from 13 patients with greater than 80 per cent stenosis and symptoms within 30 days of CEA. Groups were matched for sex, age, risk factors and plaque size. Samples were stained with haematoxylin and eosin, and Van Gieson stains. An endothelial-specific antibody to CD31 was used for immunohistochemistry. Plaques were assessed for histological characteristics while neovessels were counted and characterized by size, site and shape. RESULTS: There were more neovessels in plaques (P < 0.00001) and fibrous caps (P < 0.0001) from symptomatic than asymptomatic patients. Symptomatic plaque neovessels were larger in size (P < 0.004) and more irregular in shape. There was a significant increase in plaque necrosis and rupture in symptomatic plaques. Plaque haemorrhage and rupture were associated with more neovessels within the plaque (P < 0.02, P < 0. 001) and fibrous cap (P < 0.05, P < 0.004). Patients with preoperative or intraoperative embolization had more plaque and fibrous cap neovessels (P < 0.03, P < 0.001). CONCLUSION: Symptomatic carotid disease is associated with increased neovascularization within the atherosclerotic plaque and fibrous cap; these vessels appear larger in size, more irregular in shape and may contribute to plaque instability and onset of thromboembolic events.
