Indigenous Social Enterprises and Health and Wellbeing: A Scoping Review and Conceptual Framework.

Indigenous people and communities are establishing social enterprises to address social disadvantage and overcome health inequities in their communities. This review sought to characterize the spectrum of Indigenous social enterprises in Australia, New Zealand, Canada, and the United States to identify the operational models and cultural values that underpin them and their impact on Indigenous health and wellbeing. The scoping review followed Arksey and O'Malley's six-stage methodological framework with recommended enhancements by Levac et al. underpinned by Indigenous Standpoint Theory, and an Indigenous advisory group to provide cultural oversight and direction. Of the 589 documents screened 115 documents were included in the review. A conceptual framework of seven different operational models of Indigenous social enterprises was developed based on differing levels of Indigenous ownership, control, and management: (1) individual, (2) collective, (3) delegative, (4) developmental, (5) supportive, (6) prescriptive and (7) paternalistic. Models with 100% Indigenous ownership and control were more likely to contribute to improved health and wellbeing by increasing self-determination and strengthening culture and promoting healing than others. Indigenous social enterprises could offer a more holistic and sustainable approach to health equity and health promotion than the siloed, programmatic model common in public health policy.

Minimal aortic injury after blunt trauma: selective nonoperative management is safe.

BACKGROUND: An increasing number of minimal aortic injuries (MAIs) are being identified with modern computed tomography (CT) imaging techniques. The optimal management and natural history of these injuries are unknown. We have adopted a policy of selective multidisciplinary nonoperative management of MAI. This study examines our experience with these patients from July 2004 to June 2009. METHODS: Retrospective chart review of all blunt trauma patients who underwent chest CT angiography to evaluate for blunt aortic injury (BAI) was undertaken. All patients deemed to have a MAI were managed nonoperatively, and those with a severe aortic injury underwent repair. Data collected included age, mechanism of injury, Injury Severity Score, type and location of aortic injury, intensive care unit length of stay (LOS), overall LOS, ventilator days, disposition, and mortality. In addition, all BAIs were graded according to the Presley Trauma Center CT Grading System of Aortic Injury. RESULTS: Forty-seven patients with BAI were identified. Thirty-two were classified as severe injuries, and 15 were considered MAI (32%). Nineteen underwent operative repair, 13 underwent endovascular stent graft repair, and 15 were managed nonoperatively. The average Injury Severity Score was 31 ± 10, and the average age was 44 ± 20 with no significant difference across treatment groups. There was no difference in overall or intensive care unit LOS. The nonoperative group had a shorter duration of ventilator days (1.1 vs. 4.28, p = 0.02). There were five deaths, none in the nonoperative group. None of these patients required subsequent intervention. All nonoperative patients had follow-up imaging at median of 4 days; on CT chest angiography, five injuries had resolved, eight had stable intimal flaps or pseudoaneurysm, and two had no detectable injury on subsequent aortogram. CONCLUSION: Almost one-third of our BAI were safely managed nonoperatively. Patients with MAI should be considered for selective nonoperative management in a multidisciplinary approach with close radiographic follow-up. We recommend that patients with MAIs should be considered for selective nonoperative management.

Four- and eight-channel aortoiliac CT angiography: a comparative study.

PURPOSE: To compare performance parameters, contrast material load and radiation dose in a patient cohort having aortoiliac CT angiography using 4- and 8-channel multidetector CT (MDCT) systems. METHODS: Eighteen patients with abdominal aortic aneurysms underwent initial 4-channel and follow-up 8-channel MDCT angiography. Both the 4- and 8-channel MDCT systems utilized a matrix detector of 16 x 1.25 mm rows. Scan coverage included the abdominal aorta and iliac arteries to the level of the proximal femoral arteries. For 4-channel MDCT, nominal slice thickness and beam pitch were 1.25 mm and 1.5, respectively, and for 8-channel MDCT they were 1.25 mm and 1.35 or 1.65 respectively. Scan duration, iodinated contrast material load and mean aortoiliac attenuation were compared retrospectively. Comparative radiation dose measurements for 4- and 8-channel MDCT were obtained using a multiple scan average dose technique on an abdominal phantom. RESULTS: Compared with 4-channel MDCT, 8-channel MDCT aortoiliac angiography was performed with equivalent collimation, decreased contrast load (mean 45% decrease: 144 ml versus 83 ml of 300 mg iodine/ml contrast material) and decreased acquisition time (mean 51% shorter: 34.4 sec versus 16.9 sec) without a significant change in mean aortic enhancement (299 HU versus 300 HU, p > 0.05). Radiation dose was 2 rad for the 4-channel system and 2/1.5 rad for the 8-channel system at 1.35/1.65 pitch respectively. CONCLUSION: Compared with 4-channel MDCT, aortoiliac CT angiography with 8-channel MDCT produces equivalent z-axis resolution with decreased contrast load and acquisition time without increased radiation exposure.

Cocaine-induced renal artery dissection and thrombosis leading to renal infarction.

We present the case history of a 40-year-old man who developed renal artery dissection and thrombosis, probably due to cocaine use. The patient underwent exploratory laparotomy and thrombectomy. He remained asymptomatic and cocaine-free, and warfarin was discontinued 9 months after discharge. Approximately 12 months after discharge he returned to the hospital with symptoms very similar to previous episodes. He was found to have recurrent clot formation in the right renal artery. Further workup revealed a double heterozygous methyltetrahydrofolate reductase A1298C/C677T thermolabile polymorphism with an elevated serum homocysteine.

A computer simulation of a California casualty collection point used to respond to a major earthquake

Purpose: Casualty Collection Points (CCPs) are sites predesignated by county officials for the congregation, triage, austere medical treatment, holding, and evacuation of casualties following a major disaster. A CCP is made up of a series of discrete, interrelated step that collectively result in medical care being provided to a casualty. Methods: A series of computer simulation was run comparing differences in personnel, supplies, and evacuation configuration for a jurisdiction that plans in place to establish a CCP and for one that does not. Each simulation was for 650 earthquake-related casualties. Results:1) mortality appearrs to be related directly to performance of triage of casualties and to where they are directed for care. 2) survival is related directly time, mix of medical staff, and the ability to from "care teams" on-site 3)The sudden, massive arrival of casualties will result in a "snowball" mortality effect if staff numbers are low or do not include the proper mix of training to from care teams well before the peak arrival time of casualties 4) holding ambulances until they are filled completely before evacuation may increase mortality 5) during the first four, more lives may be saved by using transportation assets to move medical staff and supplies to a CCP. Conclusions: The simulation produced useful information. In particular, local disaster response planner need to develop rapid response methods to ensure that the best combination of medical staff are available early to care for casualties (AU)