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S N Carson

Publications and source records attributed to S N Carson.

24 records · Page 2Linked to original sources
PubMed1979

New techniques in the evaluation of cerebrovascular disease.

Numerous reports in the literature indicate that various noninvasive vascular techniques can now be used to evaluate atherosclerosis at the carotid bifurcation. This article reviews noninvasive screening techniques currently available and being developed. Particular emphasis has been placed on the practicality of these techniques as well as their limitations. Our conclusions are that noninvasive techniques cannot be used as definitive screening tests for cerebrovascular disease. Although these tests are frequently useful when positive, the false negative rate of these tests would appear to be significant and variable in different hands. Nonstenotic ulcers are usually not detected and total occlusion often not differentiated from stenosis. These tests should be viewed as the beginning rather than the end result of a developing field. At present, contrast arteriography remains the definitive test to evaluate the presence and significance of extracranial cerebrovascular disease.

Cerebrovascular Circulation↗
PubMed1977

Carcinoma obstructing the left side of the colon.

The clinical course, operative treatment, and results of 129 patients with carcinoma obstructing the left side of the colon were reviewed. There were 64 cases of incomplete obstruction, all secondary to primary adenocarcinoma of the colon. Sixty-five patients had complete obstruction; 37 of these had primary adenocarcinoma of the colon, and the rest, cancer from other primary sites, largely the genitourinary tract. The operations involving colostomy only or colostomy as part of a staged resection resulted in high operative mortality and low long-term survival, in addition to a high rate of postoperative sepsis. Results of operations involving primary resection of obstructing tumor were superior in all the above factors studied.

Adenocarcinoma↗
PubMedDate not supplied

Occurrence of occlusive intimal changes in an expanded polytetrafluoroethylene graft.

A case report is presented demonstrating pathologic changes in the neointima that formed when a polytetrafluoroethylene (PTFE) graft was placed in a 35 year old white male with severe arteriosclerosis. Representative sections of the patient's artery and graft were taken which demonstrated considerable smooth muscle proliferation in both along with full wall healing in the latter. Partial oclusion of the total length of the PTFE graft by a process similar to that occurring in the patient's own arteriosclerotic arteries was found. The consistency and extent of the involvement (> 10 cm in length) would appear to preclude entities such as neointimal fibrous hyperplasia and may point to another consequence of intimal injury and full wall graft healing which may be an undesirable effect of arteriosclerotic metabolism in the human. It is conceivable that full wall graft healing in an arteriosclerotic individual may have untoward events that need to be further investigated as new graft materials are developed.

Adult↗