University of Rochester

About: University of Rochester is a education organization based out in Rochester, New York, United States. It is known for research contribution in the topics: Population & Laser. The organization has 63915 authors who have published 112762 publications receiving 5484122 citations. The organization is also known as: Rochester University.

Carotid body tumor (chemodectoma). Clinicopathologic analysis of ninety cases

Abstract: The clinicopathologic findings in ninety cases of carotid body tumors seen at the Mayo Clinic from 1931 through 1966 are compared with those in 500 reported cases in the literature. In the ninety cases reviewed here, there were sixty-two men and twenty-eight women. In twenty cases surgery had been performed elsewhere; seventy patients were operated on here, with total excision in forty-nine, including one patient with bilateral tumors. The over-all surgical mortality rate was 5.7 per cent, usually related to carotid arterial damage or ligation. There were no tumor recurrences, although cervical node metastasis was noted in one patient and spinal metastasis in another. A classification was suggested for future surgical cases. Group 1 tumors are relatively small and minimally attached to the carotid vessels. Surgical excision usually can be carried out without difficulty. Group 2 tumors are usually larger and show moderate arterial attachment. These tumors are amenable to careful surgical removal. Group 3 tumors are usually large and incarcerate the carotids. Here the tumor must be approached with great care and vessel replacement should be considered.

Study design in qualitative research--2: Sampling and data collection strategies.

Abstract: In two prior papers in our series on qualitative research (Frankel & Devers (2000a, 2000b) Qualitative research: a consumer's guide, Education for Health, 13, 113-123; Frankel & Devers (2000) Study design in qualitative research—1: developing research questions and assessing research needs, Education for Health, 13, 251-261), we examine two critical issues in qualitative research design: sampling, including identifying and negotiating access to research sites and subjects, and data collection and management We describe these two key steps in the qualitative research design process, discuss challenges that often emerge when pursuing these steps, and provide guidelines for addressing them Qualitative research most often uses "purposive," rather than random, sampling strategies A good understanding of these sampling strategies and why they are used is central to designing a credible qualitative study In addition, given the real-world context in which most qualitative research is carried out, identifying and negotiating access to research sites and subjects are critical parts of the process We also provide suggestions for developing and maintaining productive and mutually satisfying research relationships with sites and subjects Finally, data collection and management are often neglected subjects in qualitative research We offer practical advice on how to collect and manage qualitative data, including factors to consider when deciding how struc- tured the data collection process should be, the pros and cons of audio- and/or videotaping compared with note-taking, and tips for writing up eeld notes and document management A forthcoming, enal paper in the series will focus on qualitative data analysis and the publication of qualitative research results