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Biomedical subjects

R R Tyson

Publications and source records attributed to R R Tyson.

At least 37 records · Page 2Linked to original sources
PubMed1975

Femoroperoneal bypass: evaluation of potential for revascularization of the severely ischemic lower extremity.

In 79 patients in whom distal small vessel bypass with autogenous vein was used for revascularization because of gangrene, gangrenous ulceration or rest pain, 14 had femoroperoneal bypasses. Femorotibial or femoroperoneal bypasses were performed in those patients in whom no popliteal runoff was present on pre-operative arteriogram. Femoroperoneal bypass was performed in preference to primary amputation in each case. Nine of 14 (64.3%) of femoroperoneal bypasses were functional whereas 57 of 79 (72.2%) of total distal bypasses to small vessels were functional. Salvage of severely ischemic lower extremities was achieved in 5 of 14 (35.7%) patients after femoroperoneal bypass and in 46 of 65 (70.8%) patients after bypass to anterior tibial or posterior tibial arteries. Graft patency without limb salvage occurred in 4 of 9 (44.4%) patients with patent femoroperoneal bypasses and in only 2 of 48 (4.2%) of patients with femorotibial bypass. Although limb salvage rate is considerably less with femoroperoneal than femorotibial or femoropopliteal bypass, attempted limb revascularization by peroneal bypasses is preferable to primary amputation in patients with rest pain, gangrenous ulceration or gangrene.

Amputation, Surgical↗
PubMed1975

Comparison of long-term results of 364 femoropopliteal or femorotibial bypasses for revascularization of severely ischemic lower extremities.

Successful revascularization of the severely ischemic lower extremity can be achieved by femorotibial as well as femoropopliteal bypass. The incidence of delayed graft occlusion after salvage of the severely ischemic lower extremity is low in patients with femorotibial or femoropopliteal bypass. Femorotibial bypass was performed in over one-third of patients undergoing bypass. Tibial bypasses resulted in effective prolonged revascularization of the severely ischemic lower extremity. An aggressive diagnostic and therapeutic approach to revascularization of the severely ischemic lower extremity can result in prolonged limb salvage by tibial or popliteal bypasses in lieu of primary amputation.

Arteries↗
PubMed1975

Modern concepts of diagnosis and treatment of the thoracic outlet syndrome.

Neurovascular compression at the thoracic outlet results from one or several local anatomic abnormalities, all involving the first rib to some extent. The pathologic processes produced involve syndromes usually affecting the ulnar nerve, the subclavian artery, or the subclavian vein. The majority of these cases should be managed in a nonoperative fashion and surgical treatment reserved for patients who are unresponsive to these measures. Initial conservative nonoperative treatment with physiotherapy and patient education produces satisfactory results in 70 per cent of the patients. Operative intervention, when necessary, results in satisfactory results in 90 per cent of the cases and requires first rib resection in conjunction with repair of all other attendant mechanisms. The anterior operative approach is strongly recommended whenever vascular repair is contemplated.

Arm↗