Associations Between Changes in Activity and Dietary Behaviors after Metabolic and Bariatric Surgery.

INTRODUCTION: Patients who undergo metabolic and bariatric surgery (MBS) are advised to make healthy activity and dietary changes. While previous research has examined post-surgical changes in activity and dietary behaviors separately, no study has assessed whether changes in these behaviors are beneficially associated with each other. We evaluated whether post-surgical improvements in activity behaviors related to favorable changes in dietary behaviors overall and by surgery type (Roux-en-Y gastric bypass [RYGB], sleeve gastrectomy [SG]). METHODS: At pre-surgery and 6- and 12-months post-surgery, participants (N = 97; 67 RYGB/30 SG) wore an accelerometer for 7 days and completed 24-h dietary assessments on 3 days. General linear models assessed associations between pre- to post-surgical changes in activity (moderate-to-vigorous physical intensity activity [MVPA], sedentary time [ST]) and dietary (total energy intake [EI; kcal/day], dietary quality [healthy eating index/HEI scores]) behaviors, with surgery type as a moderator. RESULTS: Participants on average: demonstrated small, non-significant post-surgical changes in MVPA and ST minutes/day (ps > .05); and reported significant post-surgical decreases in EI (p < .001), but no changes in HEI scores (ps > .25). Greater 12-month post-surgical increases in MVPA were significantly associated with greater decreases in EI, but only for RYGB participants (p < .001). DISCUSSION: Participants reported large decreases in EI, but made minimal changes in other behaviors after MBS. Results suggest greater increases in MVPA could assist with achieving greater decreases in EI, although this benefit appears to be limited to RYGB patients. Additional research is needed to confirm these findings and determine whether activity-dietary behavior associations differ beyond the immediate post-surgical year.

Does Early Surgical Decompression in Cauda Equina Syndrome Improve Bladder Outcome?: Comments on a Recent Study by Srikandarajah et al.

STUDY DESIGN AND OBJECTIVES: This study by Srikandarajah et al is a retrospective cohort study of 200 CES patients. Although parts of the study appear to be well done we identified serious problems that impacted their conclusions. SUMMARY OF BACKGROUND DATA: There is strong consensus that patients with incomplete cauda equina syndrome (CESI) should be operated upon expeditiously to prevent progression to CES with urinary retention (CESR). There is controversy concerning optimal timing of surgery in patients who have entered CESR. Some studies conclude urgent surgery for CESR does nothing to improve chance of recovery; others conclude surgery should be done within a 48 or 24-hours window after onset of bladder paralysis. Srikandarajah et al concluded that in CESI patients, decompressive surgery within 24 hours of onset of autonomic symptoms reduces bladder dysfunction at follow-up. In CESR patients, "no statistically significant difference in outcome was observed" regarding timing of surgery. METHODS: We analyzed the methods used by Srikandarajah et al to collect and analyze their data. RESULTS: The primary problem with their study is that it does not consider deterioration to CESR that occurs in CESI patients over time. We also found serious problems with the methods, implementation (including numeric errors), and interpretation of the statistical analysis. CONCLUSION: The authors' conclusion that in CESR patients, "no statistically significant difference in outcome was observed" regarding timing of surgery is not justified as a representation of their findings, because absence of statistical significance does not mean acceptance of the null hypothesis of "no effect". Their numeric results do show elevated risk of delay. We do not want to detract from the basic importance of this study, because it emphasizes the importance of operating expeditiously on patients with CESI. However, the authors' conclusions are compromised by the methodological problems. LEVEL OF EVIDENCE: N/A.

Geisinger's ProvenCare methodology: driving performance improvement within a shared governance structure.

Many performance improvement projects fail because they occur in parallel to the organization's shared governance structure. Leveraging the full potential of its nursing shared governance structure, Geisinger Health System's ProvenCare methodology harnessed the full potential of its staff nurses to create truly reliable workflows that benefit patients and that the team finds professionally satisfying. Using ProvenCare Perinatal and its smoking cessation education intervention and outcomes as an example, the authors describe the ProvenCare methodology.

Clinical microsystems, Part 4. Building innovative population-specific mesosystems.

BACKGROUND: In 2005, the Geisinger Health System (Danville, Pennsylvania) developed ProvenCare, first applied to coronary artery bypass graft (CABG), as an innovative provider-driven quality improvement program to promote reliable delivery of evidence-based best practices. A new mesosystem is created for each ProvenCare model, integrating the care delivery process between contributing microsystems and defining new mesosystem leadership. The approach has been expanded to many patient populations, including percutaneous coronary intervention (PCI). A NEW PCI MESOSYSTEM: In 2007 clinical microsystem thinking was applied to PCI: understanding the current processes and patterns, assembling the frontline professionals to redesign the processes, and using a beta-test phase to measure the changes and adjust accordingly, until the best process was established. A new mesosystem team was created to ensure that the right care is delivered at the tight time. REFINING IMPLEMENTATION: In the course of developing the CABG initiative, Geisinger established role definitions to keep teams on track; a comprehensive plan from design through execution and follow-up; and guiding principles established for the teams engaged in designing, developing, and implementing ProvenCare programs. PRELIMINARY EXPERIENCE: For the 40 measurable process elements in the PCI mesosystem pathway, as of month seven (July 2008) of the beta-test phase, 55% of the patients received 100% of the identified process elements. CONCLUSION: Geisinger Health System has joined different microsystems to form an innovative mesosystem capable of producing reliable, evidence-based care for patient subpopulations. This approach to embedding evidence-based care into routine care delivery can be adapted by others.