Biocompatibility of metal injection molded versus wrought ASTM F562 (MP35N) and ASTM F1537 (CCM) cobalt alloys.

We present a comparative analysis between biocompatibility test results of wrought and Metal Injection Molded (MIM) ASTM F562-02 UNS R30035 (MP35N) and F1537 UNS R31538 (CCM) alloy samples that have undergone the same generic orthopedic implant's mechanical, chemical surface pre-treatment, and a designed pre-testing sample preparation method. Because the biocompatibility properties resulting from this new MIM cobalt alloy process are not well understood, we conducted tests to evaluate cytotoxicity (in vitro), hemolysis (in vitro), toxicity effects (in vivo), tissue irritation level (in vivo), and pyrogenicity count (in vitro) on such samples. We show that our developed MIM MP35N and CCM materials and treatment processes are biocompatible, and that both the MIM and wrought samples, although somewhat different in microstructure and surface, do not show significant differences in biocompatibility.

The language of caring: nurse's aides' use of family metaphors conveys affective care.

Purpose: Using a conceptual framework from the field of care work and the theory of boundary work, we explore the use of family metaphors by nurse's aides to describe their affective care for nursing home residents. We focus on how nurse's aides can express affective care in spite of experiencing racial abuse.

Methods: Using the technique of domain analysis, we present a secondary analysis of semistructured interviews with 30 African American and immigrant aides working in three nursing homes about their experience of racism on the job.

Dioxin and furan levels found in tampons.

Background: Human exposure to dioxins and furans through diet and other sources has been of concern for many years. One specific concern, related to exposure in women's health, is the possible link to endometriosis. Although there are differences in opinion about this link, the concern from the public is real.