Aeromedical retrieval services characteristics globally: a scoping review

BACKGROUND

Aeromedical emergency retrieval services play an important role in supporting patients with critical and often life-threatening clinical conditions. Aeromedical retrieval services help to provide fast access to definitive care for critically ill patients in under-served regions. Typically, fixed-wing aeromedical retrieval becomes the most viable transport option compared with rotary-wing aircraft when distances away from centres of definitive care extend beyond 200 kms. To our knowledge, there are no studies that have investigated fixed-wing aeromedical services in the member countries of the organisation for economic cooperation and development (OECD). A description of the global characteristics of aeromedical services will inform international collaboration to optimise clinical outcomes for patients.

AIM

In this scoping review, we aimed to describe the features of government- and not-for-profit organisation-owned fixed-wing aeromedical retrieval services in some of the member countries of the OECD.

METHODS

We followed scoping review methodology based on the grey literature search strategy identified in earlier studies. This mostly involved internet-based searches of the websites of fixed-wing aeromedical emergency retrieval services affiliated with the OECD member countries.

RESULTS

We identified 460 potentially relevant records after searching Google Scholar (n = 24) and Google search engines (n = 436). After removing ineligible and duplicate information, this scoping review identified 86 government-and not-for-profit-operated fixed-wing aeromedical retrieval services as existing in 17 OECD countries. Concentrations of the services were greatest in the USA followed by Australia, Canada, and the UK. The most prevalent business models used across the identified OECD member countries comprised the government, not-for-profit, and hybrid models. Three-quarters of the not-for-profit and two-fifths of the hybrid business models were in the USA compared to other countries studied. The government or state-funded business model was most common in Australia (11/24, 46%), Canada (4/24, 17%), and the UK (4/24, 17%). The frequently used service delivery models adopted for patients of all ages included primary/secondary retrievals, secondary retrievals only, and service specialisation models. Of these service models, primary/secondary retrieval involving the transportation of adults and children from community clinics and primary health care facilities to centres of definitive care comprised the core tasks performed by most of the aeromedical retrieval services studied. The service specialisation model provided an extra layer of specialist health care dedicated to the transportation of neonates and paediatrics. At least eight aeromedical retrieval services catered solely for children from birth to 16 years of age. One aeromedical service, the royal flying doctor service in Australia also provided primary health care and telehealth services in addition to primary retrieval and interhospital transfer of patients. The doctor and registered nurse/paramedic (Franco-German model) and the nurse and/or paramedic (Anglo-American model) configurations were the most common staffing models used across the aeromedical services studied.

CONCLUSIONS

The development and composition of fixed-wing aeromedical emergency retrieval services operated by not-for-profit organisations and governments in the OECD countries showed diversity in terms of governance arrangements, services provided, and staffing models used. We do not fully understand the impact of these differences on the quality of service provision, including equitable service access, highlighting a need for further research.

Cohort study comparison of Mental Health and Wellbeing Services delivered by The Royal Flying Doctor Service, across Far North and Central West Queensland

Background

Understanding cultural differences between geographical regions is essential in delivering culturally appropriate healthcare. We aimed to describe the characteristics and outcomes of diverse clients using the Far North Mental Health and Wellbeing Service (FNS) and the Central West Health and Wellbeing Service (CWS).

Methods

We conducted a cohort study within Queensland, Australia, on all clients who received a mental health therapy session at either the FNS or the CWS. Patient data was prospective data collected form July 2019 to December 2020.

Findings

There were1202 clients, with a median number of individual contacts per-client of 3.0 (IQR 2.0-6.0). There was 428 (35.6% 95% CI 32.90-38.39) males and 772 (64.2% 95% CI 61.44-66.94) females with a median age across the genders of 38.0 (IQR 28.0-51.0). There was 505 (42.0% 95% CI 39.20-44.86) identifying as Indigenous and 697 (58.0% 95% CI 55.14-60.80) as non-Indigenous Australians. The FNS had a significantly higher proportion of Indigenous clients (n=484; 54.8% 95% CI 51.46-58.13) as compared to the CWS (n=21; 6.6% 95% CI 4.12-9.89). Of the 1202 clients, 946 (78.7% 95% CI 76.28-80.99) had a socio-economic classification of ‘most disadvantaged’, consisting of 740 (83.8%) clients from the FNS and 206 (64.6%) clients from the CWS. The majority of presentations were for neurotic, stress-related and somatoform disorders (n=568; 47.3%), followed by mood affective disorders (n=310; 25.8%). The overall number of treatments strategies employed was 10798, equalling a median of 6.0 (IQR 4.0-9.0) strategies per-client, with the leading strategies being counselling/psychosocial (n=1394; 12.9%), reflective listening (n=1191; 11.0%), and strengths based reasoning (n=1116; 10.3%). There were 511 (42.5%) clients who completed the Kessler Psychological Distress Scale (K10/K5), with 493 (41.0%) clients not offered as deemed not culturally appropriate by the treating team. The mean initial K10/K5 score was 23.7 (SD 9.4) which significantly decreased (p<0.001) to 18.0 (SD 10.0) at final consultation.

Interpretation

This study highlighted client socioeconomic differences between two geographically remote mental health services. It is essential that services are regionally co-designed to ensure cultural appropriateness.

Funding

No funding to declare.

Pregnancy-related aeromedical retrievals in rural and remote Australia: national evidence from the Royal Flying Doctor Service

BACKGROUND

Inequalities in the availability of maternity health services in rural Australia have been documented, but not the impact on aeromedical retrievals. This study aims to examine the prevalence of pregnancy-related aeromedical retrievals, the most common conditions (overall and in specific age groups), and their distribution according to operation area and demographic characteristics.

METHODS

Cross-sectional study using administrative data from the Royal Flying Doctors Service (RFDS) including all pregnant women aged 15-49 years retrieved by the RFDS between 2015 and 2019. All pregnancy-related aeromedical retrievals were classified according to the International Classification of Diseases, Tenth Revision (ICD-10, chapter XV). The distribution of pregnancy-related conditions was presented overall and stratified by age group (i.e. < 20 years, 20-34 years and 35+ years). Retrieval and receiving sites were geographically mapped with Tableau mapping software® based on postcode numbers of origin and destination.

RESULTS

A total of 4653 pregnancy-related retrievals were identified (mean age 27.8 ± 6.1 years), representing 3.1% of all RFDS transfers between 2015 and 18 and 3.5% in 2018-19 (p-value 0.01). The highest proportion of pregnancy-related retrievals (4.8%) occurred in Western operation. There was an apparent increase in pregnancy-related retrievals in South Australia and the Northern Territory (Central Operation) in 2018-19. Preterm labour/delivery was responsible for 36.4% of all retrievals (40.7% among women aged 15-19 years) and premature rupture of membranes for 14.9% (19.4% among women aged 35-49 years). Inter-hospital transfers represented 87.9% of all retrievals, with most patients relocated from rural and remote regions to urban hospitals; most retrievals occurred during the day, with a median distance of 300 km. Adolescents and Aboriginal and Torres Strait Islander were overrepresented in the sample (four and eight times higher than their metropolitan counterparts, respectively).

CONCLUSIONS

The proportion of pregnancy-related aeromedical retrievals varies geographically across Australia. Overall, one-third of retrievals were related to preterm/delivery complications, especially among adolescents. Most retrievals performed by the RFDS are susceptible to public health strategies aimed at improving antenatal care and preventing unintended pregnancies among adolescents and Aboriginal and Torres Strait Islander women. Greater capacity to manage pregnancy conditions in rural hospitals could reduce the requirement for aeromedical inter-hospital transfers.

Investigating the intra- and inter-rater reliability of a panel of subjective and objective burn scar measurement tools

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Subjective scar measures have poor reliability unless repeated by more than one assessor.

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Objective scar measures have been demonstrated to have good to excellent reliability.

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Physical symptoms of scars such as pain and itch were found to be more important to patients compared to surface, area and colour although this finding was not sustained when corrected for multiple comparisons.

Background

Research into the treatment of hypertrophic burn scar is hampered by the variability and subjectivity of existing outcome measures. This study aims to measure the inter- and intra-rater reliability of a panel of subjective and objective burn scar measurement tools.

Methods

Three independent assessors evaluated 55 scar and normal skin sites using subjective (modified Vancouver Scar Scale [mVSS] & Patient and Observer Scar Assessment Scale [POSAS]) and objective tools. The intra-class correlation coefficient was utilised to measure reliability (acceptable when >0.70). Patient satisfaction with the different tools and scar parameter importance were assessed via questionnaires.

Results

The inter-rater reliabilities of the mVSS and POSAS were below the acceptable limit. For erythema and pigmentation, all of the Scanoskin and DSM II measures (except the b* value) had acceptable to excellent intra and inter-rater reliability. The Dermascan ultrasound (dermal thickness, intensity) had excellent intra- and inter-rater reliability (>0.90). The Cutometer R0 (firmness) had acceptable reliability but not R2 (gross elasticity). All objective measurement tools had good overall satisfaction scores. Patients rated scar related pain and itch as more important compared to appearance although this finding was not sustained when corrected for multiple comparisons.

Conclusion

The objective scar measures demonstrated acceptable to excellent intra- and inter-rater reliability and performed better than the subjective scar scales.

Similarities between military and medical service: stigma of seeking mental health assistance

Studies have identified that there are many barriers to treatment of mental health illnesses in military populations, including the negative-associated stigma. One such barrier includes perceptions of weakness, leading to concerns about leadership and competency and being seen as malingering. Furthermore, similarities can be seen in civilian health professionals, where concerns of negative perceptions can limit reporting and treatment of mental health illnesses. Despite the frequency of stressful events, military and health professionals do not become immune to stress and are often ill prepared to cope with acute stressors that can often build on each other until emotional exhaustion and/or crisis point. Even with targeted internal programmes, the stigma of seeking mental health assistance in the military and medicine is poor and is believed to contribute to poor outcomes, such as the potential of increased suicide prevalence.

Visualization of the nucleus and nuclear envelope in situ by SEM in tissue culture cells

Our previous work characterizing the biogenesis and structural integrity of the nuclear envelope and nuclear pore complexes (NPCs) has been based on amphibian material but has recently progressed into the analysis of tissue-culture cells. This protocol describes methods for the high resolution visualization, by field-emission scanning electron microscopy (FESEM), of the nucleus and associated structures in tissue culture cells. Imaging by fluorescence light microscopy shows general nuclear and NPC information at a resolution of approximately 200 nm, in contrast to the 3-5 nm resolution provided by FESEM or transmission electron microscopy (TEM), which generates detail at the macromolecular level. The protocols described here are applicable to all tissue culture cell lines tested to date (HeLa, A6, DLD, XTC and NIH 3T3). The processed cells can be stored long term under vacuum. The protocol can be completed in 5 d, including 3 d for cell growth, 1 d for processing and 1 d for imaging.

A protocol for isolating Xenopus oocyte nuclear envelope for visualization and characterization by scanning electron microscopy (SEM) or transmission electron microscopy (TEM)

This protocol details methods for the isolation of oocyte nuclear envelopes (NEs) from the African clawed toad Xenopus laevis, immunogold labeling of component proteins and subsequent visualization by field-emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). This procedure involves the initial removal of the ovaries from mature female X. laevis, the dissection of individual oocytes, then the manual isolation of the giant nucleus and subsequent preparation for high-resolution visualization. Unlike light microscopy, and its derivative technologies, electron microscopy enables 3-5 nm resolution of nuclear structures, thereby giving unrivalled opportunities for investigation and immunological characterization in situ of nuclear structures and their structural associations. There are a number of stages where samples can be stored, although we recommend that this protocol take no longer than 2 d. Samples processed for FESEM can be stored for weeks under vacuum, allowing considerable time for image acquisition.

Generation of cell-free extracts of Xenopus eggs and demembranated sperm chromatin for the assembly and isolation of in vitro-formed nuclei for Western blotting and scanning electron microscopy (SEM)

This protocol details methods for the generation of cell-free extracts and DNA templates from the eggs and sperm chromatin, respectively, of the clawed toad Xenopus laevis. We have used this system with scanning electron microscopy (SEM), as detailed herein, to analyze the biochemical requirements and structural pathways for the biogenesis of eukaryotic nuclear envelopes (NEs) and nuclear pore complexes (NPCs). This protocol requires access to female frogs, which are induced to lay eggs, and a male frog, which is killed for preparation of the sperm chromatin. Egg extracts should be prepared in 1 d and can be stored for many months at -80 degrees C. Demembranated sperm chromatin should take only approximately 2-3 h to prepare and can be stored at -80 degrees C almost indefinitely. The time required for assembly of structurally and functionally competent nuclei in vitro depends largely on the quality of the cell-free extracts and, therefore, must be determined for each extract preparation.