In previous work in our laboratories and in the ocean, we have investigated the formation and dissociation of composite CO2 particles made of CO2 hydrate, liquid CO2, and water. The composite is formed by partially converting liquid CO2 into hydrate at mid‐ocean depth (1000–1200 m) conditions. Partial conversion of CO2 into hydrate enables injection of CO2 in seawater in the form of a dense composite material that will drive CO2 to ocean depths well below the injection point. Thermodynamic conditions allowing the formation of negatively buoyant composite particles have been established for a laboratory‐scale, continuous‐jet hydrate reactor (CJHR). An investigation has been performed to explore the issues related to the scale‐up of the CJHR. Hydrate was formed using two CJHR geometries; the first sprayed water in CO2, and the second sprayed CO2 in water. Using a plot of Ohnesorge vs. Reynolds numbers allowed flow rates to be selected that would yield a spray regime and maximize hydrate formation. The effect of varying pressure and liquid flow rates on hydrate behavior was observed. Depending on these parameters, hydrate particles were observed to sink, float, or be neutrally buoyant. A two‐order‐of‐magnitude scale‐up in the flow rates of the two fluids has been achieved with the larger CJHR geometries without losing the important characteristics of the hydrate particles (i.e., density and cohesiveness). Temperature changes as a result of hydrate formation were also monitored. A mathematical model has been developed to predict the fate of sinking CO2 hydrate particles after release in the seawater. These results can guide further field and laboratory investigations related to the scale‐up of ocean CO2 sequestration. © 2007 American Institute of Chemical Engineers AIChE J, 2007
In the United States, a total of 1,479,350 new cancer cases and 562,340 deaths from cancer were estimated to occur in 2009. 1 All patients experience some level of distress associated with the diagnosis and treatment of cancer at all stages of the disease. Surveys have found that 20% to 40% of patients with newly diagnosed and recurrent cancer show a significant level of distress. 2 However, fewer than 10% are actually identified and referred for psychosocial help. 3 Many cancer patients who are in need of psychosocial care are not able to get the help they need due to the under recognition of patient's psychological needs by the primary oncology team and lack of knowledge of community resources. The need is particularly acute in community oncology practices that The NCCN
The present investigation evaluated the NCCN distress management screening measure (DMSM) in a sample of 68 mixed site cancer patients. The DMSM was administered with the Brief Symptom Inventory (BSI) and the Brief Symptom Inventory-18 (BSI-18). Convergent validity was established by the moderate positive correlation between the DMSM and the BSI and BSI-18 global severity indices (r=0.59, p<0.001 and r=0.61, p<0.001, respectively). Divergent validity was demonstrated by the lower correlations between the DMSM and the BSI subscales suggestive of psychopathology (e.g. paranoid ideation, obsessive-compulsive). Receiver operative characteristic (ROC) analyses demonstrated that the DMSM has moderate ability to detect distress identified by the BSI and the BSI-18 (area under curve=0.74, p<0.001 and 0.80, respectively, p<0.01, respectively). While the ROC curves suggested that the DMSM lacks a single cutoff that maximizes sensitivity and specificity, the use of multiple cutoffs renders the DMSM an effective and very rapid screen for distress among cancer patients.
The integration of psychosocial care into the routine care of all patients with cancer is increasingly being recognized as the new standard of care. These NCCN Clinical Practice Guidelines in Oncology for Distress Management discuss the identification and treatment of psychosocial problems in patients with cancer. They are intended to assist oncology teams identify patients who require referral to psychosocial resources and to give oncology teams guidance on interventions for patients with mild distress to ensure that all patients with distress are recognized and treated.
BACKGROUND. With increasing numbers of childhood cancer survivors, direct sequelae of cancer therapy and psychosocial outcomes are becoming more important. The authors described psychosocial outcomes (education, employment, health insurance, and marriage) for survivors of pediatric lower extremity bone tumors. METHODS. The long-term follow-up study of the Childhood Cancer Survivor Study is a multiinstitutional cohort study comprising 14,054 individuals who have survived for 5 or more years after treatment for cancer diagnosed during childhood or adolescence. Baseline demographic and medical information were obtained. Six hundred ninety-four survivors had osteosarcoma or Ewing sarcoma of the lower extremity or pelvis and were classified by amputation status and by age at diagnosis. The median age at diagnosis was 14 years old with a median of 16 years of follow up since diagnosis. Demographic characteristics were used to analyze the rates of psychosocial outcomes. RESULTS. Amputation status and age at diagnosis did not significantly influence any of the measured psychosocial outcomes. Education was a significant positive predictor of employment, having health insurance, and being currently in their first marriage. Male gender predicted ever being employed and female gender predicted having health insurance and marriage. When compared with siblings, amputees had significant deficits in education, employment, and health insurance. CONCLUSIONS. Overall, no differences between amputees and nonamputees were found. However, gender and education play a prominent role. When compared with siblings, amputees in this cohort may benefit from additional supports.
The quality of life after bone marrow transplantation (BMT) was studied in 109 adult allogeneic BMT recipients transplanted on at the Helsinki University Central hospital for a haematological malignancy. Physical, functional, emotional and social well-being was measured on the Functional Assessment of Cancer Therapy Scale (FACT-BMT) and a shortened version of the Profile of Mood States Scale (POMS) and by the MOS social support survey and a Brief Measure of Social Support (SSQ6). The results of the present study replicate those of previous investigations by finding that physical well-being, educational level, age at BMT and social support have an impact on the perceived quality of life of BMT patients. Our results indicate that these factors have a varying impact at different time points during the post-BMT recovery process. During the first three years after BMT, physical well-being proved to be a highly significant (P < 0.001) factor for perceived life satisfaction. Moreover, physical well-being showed an average significant improvement after the first post-BMT year. The percentage of the recipients experiencing the highest levels of satisfaction with life increased from 51% during the first year after BMT to 81% for those patients five years post-BMT. One year after BMT, 75.6% of the BMT recipients were able to work, 67.8% of the patients were actively participating in work/school and 7.8% were unemployed.
To assess the impact of the diagnosis and modern treatment of childhood cancer on achievement of adult goals, the authors evaluated employment, health and life insurance coverage, marriage, divorce, and reproduction in 227 former pediatric cancer patients. Each area was evaluated in relation to a common set of disease and demographic factors that included age at follow-up, age at diagnosis, gender, marital status, history of disease recurrence, and diagnosis. Patients were younger than 20 years of age at diagnosis, and their diagnoses were made between January 1,1960, and December 31,1984. The median age at diagnosis was 11.4 years, and the median age at follow-up was 26.6 years. The percentage of unemployed male respondents did not differ from population norms. The percentage of unemployed female respondents, however, was slightly higher than that of the United States population. Approximately 11% of the survivors reported some form of employment-related discrimination, a level significantly lower than that of prior reports. Company-offered health insurance was provided to 92.4% of full-time and 90.0°/o of part-time employed respondents. Life insurance was purchased by 60% of full-time employed men and 55% of women. These percentages were lower than those reported for the United States population. Twenty-four percent of those with life insurance had difficulty obtaining it. Fifty-eight percent of the subjects were married or lived as married. The percentages of married men and women were significantly lower than United States norms. Twenty percent of those who were married or lived as married have divorced or separated or no longer live as married. Women aged 20 to 24 years were less likely to marry, and women aged 35 to 44 years had a significantly higher frequency of divorce than similarly aged United States women. In general, the history of childhood cancer did not influence the decision to marry or live as married but was occasionally (20°/0] important in the decision to dissolve a marital relationship. Many former patients indicated that their diagnosis and treatment for childhood cancer influenced their decision to have children. The current study suggests that most former pediatric cancer patients achieve adult life goals. Additional research is necessary to define those populations at greatest risk of failure to achieve these goals.
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