Aeromedical retrievals as a measure of potentially preventable hospitalisations and cost comparison with provision of GP-led primary health care in a remote Aboriginal community

INTRODUCTION

Kowanyama is a very remote Aboriginal community on the Cape York Peninsula of Far North Queensland, Australia. It is among the five most disadvantaged communities in Australia, with a very high burden of disease. It has access to 2.5 days each week of fly-in, fly-out, GP-led primary health care for a population of 1200. All patients requiring higher level care undergo aeromedical retrieval to a bigger centre. A retrospective clinical audit of charts was undertaken assessing aeromedical retrievals from Kowanyama for the year 2019 to assess whether GP access might correlate with retrievals or hospital admissions for potentially preventable conditions and whether it could be cost-effective and improve outcomes to provide the benchmarked staffing of GPs.

METHODS

Using a tool made by the authors for this audit, the management and reason for evacuation were assessed against Queensland Health's Primary Clinical Care Manual guidelines, whether the presence of a rural generalist GP would have prevented the need for retrieval, and assessed against accepted Australian (and Canadian) criteria for potentially preventable hospital admissions. Each retrieval was then assessed as 'preventable' or 'not preventable'. The cost of providing benchmark levels of GPs in community was compared with the cost of potentially preventable retrievals.

RESULTS

In 2019, there were 89 retrievals of 73 patients. Thirty-nine percent (35) of all retrievals occurred when a doctor was on site. Of preventable retrievals, 33% (18) occurred with a doctor on site and 67% (36) occurred with no doctor on site. All retrievals with a doctor on site resulted in an admission. All immediate discharges (10% (9)) or deaths (1% (1)) were for retrievals without a doctor on site. Sixty-one percent (54) of all retrievals were potentially preventable, with the two most common conditions being pneumonia - non vaccine preventable (18% (9)) and bacterial/unspecified (14% (7)). Thirty-two percent (20) of patients accounted for 52% (46) of retrievals and of these 63% (29) were potentially preventable (compared to 61% overall). For preventable condition retrievals, the mean number of visits to the clinic compared to non-preventable condition retrievals was higher for registered nurse or Aboriginal Health Worker visits (1.24 v 0.93) and lower for doctor visits (0.22 v 0.37). The conservatively calculated costs of retrievals matched the maximum cost of providing benchmark numbers (2.6 full-time equivalents) of rural generalist doctors in a rotating model for the audited community.

CONCLUSION

Greater access to GP-led primary health care may lead to fewer retrievals/hospital admissions for potentially preventable conditions. It is likely that some preventable condition retrievals might be avoided if full coverage with benchmarked numbers of rural generalist GPs in a GP-led primary health team was provided in remote communities. This may be cost-effective and improve patient outcomes, and should be further explored.

Trauma care in the tropics: addressing gaps in treating injury in rural and remote Australia

In Australia, over half a million people are admitted to hospital every year as a result of injury, and where you live matters. Rural populations have disproportionately higher injury hospitalisation rates (1.5-2.5-fold), higher rates of preventable secondary complications, higher mortality rates (up to fivefold), and higher costs (threefold) than patients injured in major cities. These disparities scale up rapidly with increased remoteness, and shift the service needle from 'scoop and run' to 'continuum of care'. Poorer outcomes, however, are not solely due to longer retrieval distances or delays; they arise from inefficiencies in one or more potentially modifiable factors in the chain of survival. After discussing the burden of injury in Australia, we present a brief history of retrieval services in Queensland and discuss how remoteness requires a different kind of service delivery with many moving parts from point of injury to definitive care. We next address the ongoing challenges for the Australian Trauma Registry, and how centralisation of data from the metropolitan cities masks the inequities in rural and remote trauma. There is an urgent need for accurate data from all service providers around Australia to inform state and federal governments, and we highlight the paucity of trauma data analysis in North Queensland. Last, we identify some major gaps in treating rural and remote polytrauma and en-route patient stabilisation, and discuss the relevance of combat casualty care research and practices. We conclude that a greater emphasis should be placed on collecting more robust trauma patient records, as only accurate data will drive change.

Profiling helicopter emergency medical service winch operations involving physicians in Queensland, Australia

OBJECTIVE

To analyse the mission profiles of helicopter emergency medical service (HEMS) winch operations involving LifeFlight Retrieval Medicine physicians in Queensland, Australia, specifically focusing on patients' clinical characteristics, extrication methods and scene times.

METHODS

A retrospective analysis was performed to identify all helicopter winch missions involving physicians during 2019. Demographic, clinical and non-clinical data were accessed from an electronic database used to log cases and findings presented using descriptive statistics.

RESULTS

Out of 4356 HEMS missions involving physicians, 100 (2.3%) were winch operations. Of these, 31 (31%) occurred overwater and 12 (12%) at night. In total, 106 patients were attended, and eight patient deaths occurred. Most patients were traumatically injured (66%), male (66%) and had a median (interquartile range) age of 43.5 (28-59) years. Thirteen missions (13%) involved drowning victims. This group had a higher burden of injury and comprised half of the patients treated with endotracheal intubation. Median scene time was 30 min (20-40), and the winch stretcher was the predominant patient extrication method. Physician winching occurred in 63 (63%) missions and was associated with increased scene time and increased use of the winch stretcher.

CONCLUSIONS

Winch operations involving physicians occur infrequently in Queensland HEMS, although almost a third of missions occur overwater. Drowning victims are encountered more frequently than reported elsewhere in Australian HEMS and comprised half of the patients who underwent endotracheal intubation. Patients' severity of illness and injury may contribute to the associations between winching of physicians, increased scene times and increased use of the winch stretcher.

Aeromedical retrieval diagnostic trends during a period of Coronavirus 2019 lockdown

Background

Little is known on the trends of aeromedical retrieval (AR) during social isolation.

Aim

To compare the pre, lockdown, and post‐lockdown AR patient characteristics during a period of Coronavirus 2019 (COVID‐19) social isolation.

Methods

An observational study with retrospective data collection, consisting of AR between 26 January and 23 June 2020.

Results

There were 16 981 AR consisting of 1983 (11.7%) primary evacuations and 14 998 (88.3%) inter‐hospital transfers, with a population median age of 52 years (interquartile range 29.0–69.0), with 49.0% (n = 8283) of the cohort being male and 38.0% (n = 6399) being female. There were six confirmed and 230 suspected cases of COVID‐19, with the majority of cases (n = 134; 58.3%) in the social isolation period. As compared to pre‐restriction, the odds of retrieval for the restriction and post‐restriction period differed across time between the major diagnostic groups. This included, an increase in cardiovascular retrieval for both restriction and post‐restriction periods (odds ratio (OR) 1.12, 95% confidence interval (CI) 1.02–1.24 and OR 1.18 95%, CI 1.08–1.30 respectively), increases in neoplasm in the post restriction period (OR 1.31, 95% CI 1.04–1.64) and increases for congenital conditions in the restriction period (OR 2.56, 95% CI 1.39–4.71). Cardiovascular and congenital conditions had increased rates of priority 1 patients in the restriction and post restriction periods. There was a decrease in endocrine and metabolic disease retrievals in the restriction period (OR 0.72, 95% CI 0.53–0.98). There were lower odds during the post‐restriction period for retrievals of the respiratory system (OR 0.78, 95% CI 0.67–0.93), and disease of the skin (OR 0.78, 95% CI 0.6–1.0). Distribution between the 2019 and 2020 time periods differed (P < 0.05), with the lockdown period resulting in a significant reduction in activity.

Conclusion

The lockdown period resulted in increased AR rates of circulatory and congenital conditions.

Using publicly available flight data to analyze health disparities in aeromedical retrieval

OBJECTIVES

Specialist healthcare cannot be provided in all locations. Helicopters can help to reduce the inherent geographical inequity caused by long distances or difficult terrain. However, the selective use of aeromedical retrieval could lead to other forms of health disparities. The aim of this project was to evaluate such inequities in access to helicopter transport.

METHODS

This was a geospatial analysis of publicly available flight tracking data for 18 emergency medical helicopters in the state of Alabama for a 90-day period between March 2019 and June 2019. Data are presented as the number of incidents attended per population, by population (total, insured, and uninsured), as funnel plots, by county. This method allows the identification of positive and negative outliers.

RESULTS

We identified 672 likely scene retrieval flights. Twelve counties were probable (outside of 99% confidence interval [CI]) high outliers (more helicopter retrievals than expected), and 4 were possible (outside of 95% CI) high outliers. There were 5 possible low outliers (fewer helicopter retrievals than expected) and 6 probable low outliers. Analysis by insurance status revealed similar results. However, there was no easily discernible geographic pattern to this variability.

CONCLUSION

There is considerable geographical variability in the number of helicopter retrievals, with no easily discernable pattern. Some of this variability may be due to differences in injury epidemiology, but others may be due to case selection. However, the present data are insufficient to come to firm conclusions, and additional study is warranted.

A Comparison of Prehospital Nonphysician and Hospital Physician Placed Tube Thoracostomy

BACKGROUND

Prehospital chest decompression can be a lifesaving procedure in severe chest trauma. Studies investigating prehospital chest decompression are mostly European where physicians are assigned to prehospital care units. This report is one of the first to compare demographics and outcomes in patients undergoing prehospital chest decompression by trained aeromedical nonphysician personnel to hospital chest decompression by physicians.

METHODS

Prehospital tube thoracostomy (PTT) patients were identified from January 2014 to January 2019 and were matched in a 1:2 ratio based on age, Injury Severity Score (ISS), and chest Abbreviated Injury Score (AIS) to patients who underwent hospital tube thoracostomy (HTT) within 24 hours of admission.

RESULTS

Forty-nine PTT patients were matched to 98 HTT patients. PTT patients had lower admission Glasgow Coma Scale (GCS), a higher rate of pre-chest tube needle decompression, and higher level 1 trauma activation. PTT were placed sooner (21.9 vs 157.0 minutes, P < .001). Rates of tube malposition, organ injury, tube dislodgement, empyema, and hospital-acquired pneumonia over the course of hospital admission were not significantly different between the 2 groups. PTT patients had longer intensive care unit length of stay (LOS), but similar hospital LOS, and overall mortality.

DISCUSSION

This report demonstrates that PTT is performed sooner than hospital placed tubes. Complication rates associated with tube thoracostomy and patient outcomes were not statistically different between PTT and HTT groups.

Aeromedical retrieval for suspected appendicitis in rural and remote paediatric patients

Introduction

The aim of this paper was to describe the characteristics of paediatric patients who underwent an aeromedical retrieval within Australia (gender and Indigenous status) for suspected appendicitis between 1 July 2014 and 30 June 2018 (4 years). By understanding these trends, we hope to further justify the need for point-of-care ultrasound training for clinicians working in rural and remote Australia.

Method

Participants included Royal Flying Doctor Service (RFDS) patients aged 0-18 years (inclusive) who underwent an aeromedical retrieval for suspected appendicitis within Australia. Data were collected and coded on each patient's inflight working diagnosis, using the International Statistical Classification of Diseases and Related Health Problems, Tenth Revision, Australian Modification (ICD-10-AM) coding method. A combination of descriptive statistics and chi-square analyses was used in data analysis, with significance considered at <0.05.

Results

There were 384 children with a working diagnosis of suspected appendicitis, including 191 (49.7%) males and 193 (50.3%) females, with 133 (34.6%) patients identifying as Aboriginal and/or Torres Strait Islander (hereafter referred to as Indigenous) Australians. The aeromedical retrievals were from rural and remote locations to inner-regional or metropolitan hospitals, with an average distance flown of 339.0 (SD = 206.4) kilometres. The RFDS most frequently retrieved for acute appendicitis (n = 159; 41.4%), acute abdominal pain (n = 127; 33.1%), and unspecified appendicitis (n = 84; 21.9%). There were non-significant (P = 0.9) diagnostic differences between genders. Non-Indigenous patients were overrepresented, compared with Indigenous patients, in relation to a transfer with a diagnosis of acute appendicitis (P = <0.01), whereas Indigenous patients were overrepresented, compared with non-Indigenous patients, in relation to transfers with diagnoses of acute abdomen pain and unspecified appendicitis (P = <0.01).

Conclusion

A significant number of paediatric patients are aeromedically retrieved from rural and remote locations with a diagnosis of appendicitis or acute abdominal pain. Future research should consider whether training in abdominal point-of-care ultrasound reduces retrievals.

Patients retrieved to intensive care via a dedicated retrieval service do not have increased hospital mortality compared with propensity-matched controls

This study was performed to estimate the effect of the retrieval process on mortality for patients admitted to a mixed adult intensive care unit (ICU) compared with propensity-matched, non-retrieved controls. Patients retrieved to the Royal Adelaide Hospital (RAH) ICU between 2011 and 2015 were propensity-score matched for age, gender, Aboriginal and Torres Strait Islander status, Acute Physiology and Chronic Health Evaluation (APACHE) III score and diagnostic group with non-retrieved ICU patients to estimate the average treatment effect of retrieval on hospital mortality. Factors associated with mortality in those retrieved were assessed by multiple logistic regression. Retrieved patients comprised 1,597 (14%) of 11,641 index ICU admissions; this group were younger, mean (standard deviation) 53 (18.5) versus 59 (17.7) years, had higher APACHE III scores, 61 (30.3) versus 56 (27.5), were more likely to be Indigenous (5.1% versus 3.7%) and to have sustained trauma (34% versus 9%). The average treatment effect for retrieval on hospital mortality, risk difference (95% confidence interval), was -0.7% (-2.8% to 1.3%), <i>P</i>=0.50. Variables independently associated with hospital mortality in those retrieved included age, APACHE III score and diagnostic category. Time from retrieval team activation to arrival with the patient, rural location, radial distance from the RAH and population size at the retrieval location were not significantly associated with mortality. The hospital mortality for retrieved patients was not significantly different when compared with propensity-matched controls. Mortality in those retrieved was associated with increasing age, APACHE III score and diagnostic category; however, was independent of time from team activation to arrival with the patient.

Ketamine reduces the need for intubation in patients with acute severe mental illness and agitation requiring transport to definitive care: An observational study

OBJECTIVES

The aim of this study was to review mental health patients transported by a dedicated statewide critical care retrieval team before and after the implementation of a ketamine sedation guideline.

METHODS

This is a a retrospective cohort study of mental health patients with acute behavioural disturbance, transported between January 2010 and December 2015.

RESULTS

A total of 78 patients were transported in the study period, 50 before and 28 after implementation of the ketamine guideline in June 2013. The introduction of the ketamine guideline was associated with a significant reduction in intubation for transport (36.00 vs 7.14%) (odds ratio 0.14, 95% confidence interval 0.02-0.71, P < 0.01). The likelihood of utilising ketamine for non-intubated patients (n = 58) was higher in the period after implementation (37.50 vs 84.62%, odds ratio 9.17, 95% confidence interval 2.54-33.08, P < 0.005). The incidence of complications in our series was low.

CONCLUSIONS

The implementation of a ketamine clinical practice guideline for agitated mental health patients was associated with an increase in the number of patients receiving ketamine as part of their sedation regime and a reduction in the number of patients requiring intubation for transport. Appropriately trained critical care retrieval teams should consider ketamine as part of the sedation regime for agitated mental health patients.

Prospective evaluation of prehospital trauma ultrasound during aeromedical transport. J Emerg Med. 2014;47:638-645. [PMID: 25281177 DOI: 10.1016/j.jemermed.2014.07.056]

BACKGROUND

Ultrasound is widely considered the initial diagnostic imaging modality for trauma. Preliminary studies have explored the use of trauma ultrasound in the prehospital setting, but the accuracy and potential utility is not well understood.

OBJECTIVE

We sought to determine the accuracy of trauma ultrasound performed by helicopter emergency medical service (HEMS) providers.

METHODS

Trauma ultrasound was performed in flight on adult patients during a 7-month period. Accuracy of the abdominal, cardiac, and lung components was determined by comparison to the presence of injury, primarily determined by computed tomography, and to required interventions.

RESULTS

HEMS providers performed ultrasound on 293 patients during a 7-month period, completing 211 full extended Focused Assessment with Sonography for Trauma (EFAST) studies. HEMS providers interpreted 11% of studies as indeterminate. Sensitivity and specificity for hemoperitoneum was 46% (95% confidence interval [CI] 27.1%-94.1%) and 94.1% (95% CI 89.2%-97%), and for laparotomy 64.7% (95% CI 38.6%-84.7%) and 94% (95% CI 89.2%-96.8%), respectively. Sensitivity and specificity for pneumothorax were 18.7% (95% CI 8.9%-33.9%) and 99.5% (95% CI 98.2%-99.9%), and for thoracostomy were 50% (95% CI 22.3%-58.7%) and 99.8% (98.6%-100%), respectively. The positive likelihood ratio for laparotomy was 10.7 (95% CI 5.5-21) and for thoracostomy 235 (95% CI 31-1758), and the negative likelihood ratios were 0.4 (95% CI 0.2-0.7) and 0.5 (95% CI 0.3-0.8), respectively. Of 240 cardiac studies, there was one false-positive and three false-negative interpretations (none requiring intervention).

CONCLUSIONS

HEMS providers performed EFAST with moderate accuracy. Specificity was high and positive interpretations raised the probability of injury requiring intervention. Negative interpretations were predictive, but sensitivity was not sufficient for ruling out injury.