Objectives Although studies have shown regional and interhospital variability in the intensity of end-of-life care, few data are available assessing variability in specific aspects of palliative care in the ICU across hospitals or interhospital variability in family and nurse ratings of this care. Recently, relatively high family satisfaction with ICU end-of-life care has prompted speculation that ICU palliative care has improved over time, but temporal trends have not been documented. Design/Setting Retrospective cohort study of consecutive patients dying in the ICU in 13 Seattle-Tacoma-area hospitals between 2003 and 2008. Measurements We examined variability over time and among hospitals in satisfaction and quality of dying assessed by family, quality of dying assessed by nurses, and chart-based indicators of palliative care. We used regression analyses adjusting for patient, family, and nurse characteristics. Main Results Medical charts were abstracted for 3,065 of 3,246 eligible patients over a 55-month period. There were significant differences between hospitals for all chart-based indicators (p < 0.001), family satisfaction (p < 0.001), family-rated quality of dying (p = 0.03), and nurse-rated quality of dying (p = 0.003). There were few significant changes in these measures over time, although we found a significant increase in pain assessments in the last 24 hours of life (p < 0.001) as well as decreased documentation of family conferences (p < 0.001) and discussion of prognosis (p = 0.020) in the first 72 hours in the ICU. Conclusions We found significant interhospital variation in ratings and delivery of palliative care, consistent with prior studies showing variation in intensity of care at the end of life. We did not find evidence of temporal changes in most aspects of palliative care, family satisfaction, or nurse/family ratings of the quality of dying. With the possible exception of pain assessment, there is little evidence that the quality of palliative care has improved over the time period studied.

Repeatability of CPET parameters is generally higher than previously reported. There were no significant differences in variability related to sex, age, and fitness level; diurnal factors had a limited effect. The threshold for meaningful change in peak V˙O2 and for V˙O2@LT should be considered when gauging a response to therapies or training.

Objectives: Hyperbaric oxygen (HBO2) exposure may enhance cardiorespiratory fitness. Exercise training and HBO2 exposure stimulate mitochondrial biogenesis, increase capillary density, and induce adaptive antioxidant mechanisms. We hypothesized that an exercise regimen of sprint interval training (SIT) while breathing HBO2 would lead to a greater improvement in exercise performance compared to the same training breathing ambient air. Methods: Healthy long-term intermediate-altitude residents, ages 20-39 years, with normal spirometry and cardiorespiratory fitness were randomized to two groups: one performing six sessions of an SIT regimen over two weeks in a hyperbaric chamber (1.4 ATA [141.9 kPa], FiO2=1.0); the other performing under ambient pressure conditions (0.85 ATA [86.1 kPa], FiO2=0.21). Training effect was evaluated by comparing incremental cycle ergometry cardiopulmonary exercise testing before and after the training regimen. The primary outcome measure was peak oxygen consumption (V̇O2), while secondary outcomes included additional exercise parameters. The effect of study group on exercise parameters was assessed using two-factor repeated measures ANOVA. Results: Of 58 participants randomized, 49 completed the training program and all cardiopulmonary exercise tests (n=23 HBO2, n=26 ambient). Both groups experienced an increase in peak V̇O2: 8.1% HBO2 and 7.1% ambient; the differences were not significant (p=0.50). Secondary parameters of peak work rate and peak V̇E experienced a significantly higher change in the HBO2 group compared to the ambient group (p=0.05 and p=0.03, respectively). Conclusion: Cardiorespiratory fitness improved after a two-week SIT regimen, but improvement in peak V̇O2 was not significantly different between ambient and HBO2 groups.

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