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D C Wallace

Publications and source records attributed to D C Wallace.

258 records · Page 15Linked to original sources
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Research priorities in mental health nursing.

This study determined nursing research priorities that focused on mental health nursing in the published literature from 1990 to 1996. Determination of which priorities were related to mental health was completed using 18 sources (experts, organizations, and individual research projects). A content analysis of the 18 sources was completed, and 56 mental health related research priorities were identified. Six categories emerged from the data analysis: support, holism, mental health nursing practice, quality care outcomes, mental health etiology, and mental health delivery systems. As mental health nursing embraces evidenced-based practice, the need for clear research priorities is imperative for knowledge development in the field.

Evidence-Based Medicine↗
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Effects of iced and room temperature injectate on cardiac output measurements in critically ill patients with low and high cardiac outputs.

OBJECTIVE: To determine the effect of injectate temperature (iced or room temperature) on cardiac output values in critically ill adults with low and high cardiac outputs. DESIGN: Quasi-experimental. SETTINGS: Two multidisciplinary intensive care units in two large, metropolitan, private, nonprofit hospitals in Texas. SUBJECTS: A convenience sample of 21 critically ill men and women who averaged 61 years of age (range 31 to 82 years) and whose most recent cardiac output measured with room temperature injectate was low (< or = 3.5 L/min) or high (> or = 8.0 L/min). INTERVENTION: Iced injectate and room temperature injectate (randomly ordered) were used to measure cardiac output in each subject. OUTCOME MEASURES: Cardiac output value with iced injectate versus cardiac output value with room temperature injectate. RESULTS: We found significant differences between cardiac output measurements with room temperature and those with iced injectate in eleven critically ill patients with low cardiac outputs (< or = 3.5 L/min) and in ten critically ill patients with high cardiac outputs (> or = 8.0 L/min). In the low cardiac output group, cardiac outputs using room temperature injectate averaged 0.37 L/min (range 0.1 to 1.10 L/min) higher than cardiac outputs using iced injectate (p = 0.001). In the high cardiac output group, measurements with room temperature injectate averaged 1.17 L/min L/min (range 0.3 to 3.0 L/min) higher than cardiac outputs with iced injectate (p = 0.005). Percent differences between room temperature and iced injectate values averaged 13% (range 3% to 27%) in patients with low cardiac outputs and 11% (range 3% to 29%) in patients with high cardiac outputs. Seven (77%) of the patients in the low cardiac output group and four (40%) of the patients in the high cardiac group had a 10% or greater difference--which many clinicians describe as a clinically significant difference--between room temperature and iced injectate cardiac output values. CONCLUSION: Although research is clearly needed to substantiate these findings, we suggest that nurses use iced injectate in patients with low and high cardiac outputs (< or = 3.5 L/min or > or = 8.0 L/min) to ensure accurate measurement of cardiac output.

Adult↗
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Mitochondrial DNA and Y chromosome-specific polymorphisms in the Seminole Tribe of Florida.

Mitochondrial DNA (mtDNA) sequence variation was examined in 37 Seminoles from Florida by polymerase chain reaction amplification and high resolution restriction endonuclease analysis. The Y chromosome TaqI restriction fragment length polymorphisms detected by the probes 49a, 49f, and 12f2 were examined in the 26 males of this group. Analysis of the mtDNA revealed that all four Native American haplogroups (A, B, C and D) were present in the Seminoles encompassing about 95% of the Seminole mtDNAs. No European mtDNAs were found among the Seminoles, but two mtDNAs (about 5%) were members of the African-specific haplogroup L1, thus indicating that a limited number of African women were incorporated in the Seminole tribe. Analysis of Y chromosome haplotypes supports the hypothesis that haplotypes 18 and 63 are the most likely founding Native American Y chromosome haplotypes from Asia. However, 11% of the Seminole Y chromosomes represented haplotypes generally attributed to Europeans, though none harbored standard African haplotypes. These findings support historical evidence that the Seminole tribe has integrated individuals of European and African ancestry, but suggests that the sex ratio of nonnatives from different continents may have varied.

DNA↗