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Biomedical subjects

J May

Publications and source records attributed to J May.

At least 253 records · Page 14Linked to original sources
PubMed1979

Comparison between saphenous vein and Dacron Velour grafts for femoropopliteal bypass.

One hundred and thirty-eight femoropopliteal grafts were performed for arteriosclerotic occlusive disease of the femoral artery in a five-year period. One group of patients who had 81 saphenous vein grafts was compared with a similar group who had 57 Dacron Velour grafts. At three years 90% of the vein grafts were patent, compared to 45% of the Dacron Velour grafts. Twenty-seven per cent of all patients presented with threatenened limb loss. Amputation was averted in all but 5%. Intraoperative flow measurement did not prove to be a reliable indicator of long-term patency.

Arterial Occlusive Diseases↗
PubMed1979

Arterial reconstruction with polytetrafluoroethylene: a preliminary report.

Early results of arterial reconstruction with reinforced expanded polytetrafluoroethylene (PTFE) in the lower extremity have been obtained by reviewing 55 patients undergoing 59 operations - 38 femoropopliteal bypasses and 21 long bypasses distal to the popliteal artery. The one-year accumulated patency rates were 73% for the femoropopliteal bypass group and 50% for the long bypass group. Early results suggest that PTFE is superior to Dacron and is an acceptable substitute for autogenous saphenous vein when the latter is unavailable or of inadequate calibre.

Adult↗
PubMed1979

Polytetrafluoroethylene (PTFE) grafts for haemodialysis: patency and complications compared with those of saphenous vein grafts.

A comparison has been made between polytetrafluoroethylene (PTFE) and saphenous vein as graft material for the construction of arteriovenous fistulas for use in haemodialysis. Fifty patients with PTFE grafts have been examined and compared with 70 patients with saphenous vein grafts. At eighteen months the accumulative patency rate was 69.8% for PTFE grafts and 68.9% for saphenous grafts. Although the PTFE grafts were similar in terms of patency, their complication rate was higher. The infection rate and distal ischaemia rate for PTFE grafts were double those of the vein grafts. Two patients developed median and ulnar nerve paralysis respectively shortly after implantation of PTFE grafts. Because of this it is recommended that their use be restricted to the lower limb. Despite a higher incidence of complications, PTFE grafts are a satisfactory substitute if a suitable saphenous vein is not available.

Adult↗
PubMed1978

Multiple aneurysms in dacron velour graft.

Fomation of an aneurysm in a Dacron graft is a rare complication. It usually occurs within two years from operation. Most cases take the form of a generalized dilation. Multiple saccular aneurysms developed in a patient with a Dacron velour graft. The cause of the complication is not always clear, but multiple defects in the construction of the Dacron graft seemed the most likely cause in this case.

Aneurysm↗
PubMed1977

An audio urine-glucose analyzer for blind diabetics.

At the instigation of one of the authors (J.M.)--a young man whose blindness is due to diabetic retinopathy--a urine-glucose analyzer was designed and constructed. Its purpose and function enable him to test his urine himself (free of dependence on thers for this service) and, thereby, he can then determine and administer his doses of insulin. He and other young blind diabetics may value the degree of freedom from dependence on others than the analyzer provides and feel it helps them to be able to work and care for themselves. A description of the instrument instructions for its use, and a summary of about 20 months' experience with it are submitted.

Blindness↗
PubMed1977

Autogenous veins and velour dacron in femoropopliteal arterial bypass.

Sixty-five patients treated by femoropopliteal bypass in 1974 were surveyed; the mean follow-up time was 10.4 months. The one year cumulative patency rate for velour Dacron was 50 percent; this was less successful than were the results from a comparable group in which vein grafts were used (79 percent). These poor results were due principally to the high failure rate of velour Dacron in patients suffering from clinically severe ischemia. In these only one in four grafts remained patent. If a less than perfect arteriographic runoff was obtained, only one in three still functioned. These results occurred despite high intraoperative graft flows. It appears that velour Dacron may be acceptable in patients treated for claudication if no adequate vein is available. This prosthesis gives an unacceptably high failure rate in patients with severe ischemia.

Adolescent↗
PubMed1976

Tibial artery bypass.

Experience with 29 tibial bypasses is presented. Twenty-one have remained patent for an average time of 13.2 months. There were two hospital deaths and five additional late ones. Autogenous saphenous vein was used in 27. Electromagnetic flowmeter studies were useful in assessment of patency, but intraoperative arteriography was of limited value only. The use of peroneal artery had equivalent results to anterior and posterior tibial arteries. It is concluded that a reasonable limb prognosis may be offered to the patient with advanced ischemic disease and one or more open tibial vessels. The late mortality in this group is appreciable.

Arteries↗
PubMed1976

[Not Available].

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Belgium↗
PubMed1976

Reversal of renal failure and control of hypertension in patients with occlusion of the renal artery.

Results of arteriographic investigation of patients with deteriorating renal function or poorly controlled hypertension have revealed that thrombosis of the renal artery is not an uncommon exacerbating factor. Seventeen patients with one or more occluded renal arteries had an operation to improve renal function or to control hypertension. Stenosis of the contralateral renal artery was present in addition to the occlusion in four patients. Reconstructive arterial procedures were performed in 15 patients and nephrectomy was performed in two. Eight patients with renal failure had marked improvement in renal function after revascularization of the occluded renal arteries. The group had a mean preoperative serum creatinine value of 7.95+/-1.81 (S.E.) milligrams per cent which fell postoperatively to 3.91+/-1.21 (S.E.) milligrams per cent at a mean follow-up period 20 months. Preoperative control of hypertension was difficult in 16 of the 17 patients. Postoperatively, the blood pressure fell to normal levels in six patients, and in an additional eight patients, it did so with the administration of antihypertension therapy. The hypertension was unchanged in two patients. Plasma renin activity was measured in 14 of the patients with hypertension. It was elevated in 13 patients and normal in one patient. Postoperatively, the blood pressure was unchanged in the patient with normal plasma renin activity, but in 12 of the 13 patients with elevated plasma renin activity, the blood pressure returned to normal levels. It is concluded that patients with occluded renal arteries should be treated surgically. The major benefits of an aggressive approach to this condition are reversal of renal failure and control of hypertension.

Acute Kidney Injury↗