Who cares for the carers? carerhelp: development and evaluation of an online resource to support the wellbeing of those caring for family members at the end of their life.

BACKGROUND: Most people living with a terminal illness and approaching death will need the assistance of a non-professional carer such as a family member, friend, or neighbour to provide physical, emotional, and practical caring supports. A significant portion of these carers can feel overwhelmed, isolated and experience psychological and/or financial distress. Carers can have unmet information needs and information needs can change across the caring period. METHODS: Guided by an Australian National Reference Group, this project undertook a multiphase set of activities to enable the development of an online carer resource. These activities included a literature review of key issues and considerations for family carers supporting someone with a terminal illness, a scoping scan of existing online resources, and interviews and focus groups with eighteen carers to understand their needs and context of caring. This information formed the basis for potential digital content. A web project team was established to create the information architecture and content pathways. User testing survey and usability assessment of the CarerHelp Website was undertaken to assess/optimise functionality prior to release. An evaluation process was also devised. RESULTS: The literature review identified carer needs for practical and psychological support along with better education and strategies to improve communication. The scoping scan of available online resources suggested that while information available to carers is plentiful, much of that which is provided is general, disparately located, inadequately detailed, and disease specific. The eighteen carers who were interviewed highlighted the need for helpful information on: services, symptom management, relationships, preparation for death, managing the emotional and psychological burden that often accompanies caring, and support during bereavement. User testing and usability assessment of the prototype resource led to changes to enhance the user experience and effectiveness of navigation. It also highlighted a lack of awareness of existing resources and the needs of marketing and communication to address this problem. CONCLUSIONS: The project led to the development of an open access online resource, CarerHelp ( www.carerhelp.com.au ), for use by carers and families caring for a person who has palliative care needs. The web metrics demonstrate substantial use of the resources.

Use of Point-of-Care Ultrasound for Early Identification of Acute Aortic Root Dissection.

Point-of-care ultrasound (POCUS) is becoming a frequently utilized imaging tool in the emergency department (ED) as it can aid in early diagnosis of many pathologies. This is a case report of a 55-year-old male who presented to the emergency department by ambulance for sudden onset chest pain followed by a syncopal episode. Point-of-care echocardiogram revealed a large pericardial effusion with a significantly dilated aortic root, concerning for aortic dissection. Patient was emergently taken for a computed tomography (CT) scan, which was only remarkable for an ascending thoracic aortic aneurysm but failed to show an aortic dissection flap. On repeat POCUS, a dissection intimal flap, large pericardial effusion with tamponade physiology, and aortic regurgitation were identified and later confirmed on transesophageal echocardiogram. This case report details a rare pathology that was correctly identified on initial POCUS before it was seen on CT scan.

Family carer needs in advanced disease: systematic review of reviews.

BACKGROUND: Family carers are vital in the management and delivery of home-based palliative care. Decision-makers need to know what the most commonly expressed unmet needs of family carers are to target available support services. AIM: To identify the most commonly expressed needs of family carers of people with an advanced disease, assess the quality of current evidence, and set an agenda for future research and clinical practice. DESIGN: A systematic review of reviews, prospectively registered on PROSPERO. Study quality was assessed using the Joanna Briggs Institute critical appraisal checklist for systematic reviews and research syntheses. DATA SOURCES: MEDLINE, Embase, Emcare, PsycINFO, CINAHL, Informit and Cochrane Library were searched for reviews about the needs of carers looking after patients with advanced disease from 2010 to 2020. RESULTS: Findings from 21 reviews identified emotional support, disease-specific knowledge, carer role responsibilities, self-care and general practical support as the most commonly expressed needs expressed by family carers. Additionally, access to professional services, formal education opportunities and communication with health professionals were identified as caregivers' preferred ways of having these needs met. Extraction of carer-specific needs was challenging at times as results were often combined with patient results in reviews. CONCLUSION: Practical difficulties exist in effectively resourcing services to meet the needs of family carers. Information regarding the most commonly expressed needs shared by caregivers and their preferred delivery source can provide an opportunity to focus available support services to achieve the highest possible impact for carers of patients with advanced disease. PROSPERO REGISTRATION NUMBER: CRD42018088678.

Bridging the Gap between Ophthalmology and Emergency Medicine in Community-Based Emergency Departments (EDs): A Neuro-Ophthalmology Guide for ED Practitioners.

Coordination of care for patients with neuro-ophthalmic disorders can be very challenging in the community emergency department (ED) setting. Unlike university- or tertiary hospital-based EDs, the general ophthalmologist is often not as familiar with neuro-ophthalmology and the examination of neuro-ophthalmology patients in the acute ED setting. Embracing image capturing of the fundus, using a non-mydriatic camera, may be a game-changer for communication between ED physicians, ophthalmologists, and tele-neurologists. Patient care decisions can now be made with photographic documentation that is then conveyed through HIPAA-compliant messaging with accurate and useful information with both ease and convenience. Likewise, external photos of the anterior segment and motility are also helpful. Finally, establishing clinical and imaging guidelines for common neuro-ophthalmic disorders can help facilitate complete and appropriate evaluation and treatment.

Do family meetings for hospitalised palliative care patients improve outcomes and reduce health care costs? A cluster randomised trial.

BACKGROUND: Family meetings facilitate the exploration of issues and goals of care however, there has been minimal research to determine the benefits and cost implications. AIMS: To determine: (1) if family caregivers of hospitalised patients referred to palliative care who receive a structured family meeting report lower psychological distress (primary outcome), fewer unmet needs, improved quality of life; feel more prepared for the caregiving role; and receive better quality of end-of-life care; (2) if outcomes vary dependant upon site of care and; (3) the cost-benefit of implementing meetings into routine practice. DESIGN: Pragmatic cluster randomised trial involving palliative care patients and their primary family caregivers at three Australian hospitals. Participants completed measures upon admission (Time 1); 10 days later (Time 2) and two months after the patient died (Time 3). Regression analyses, health utilisation and process evaluation were conducted. RESULTS: 297 dyads recruited; control (n = 153) and intervention (n = 144). The intervention group demonstrated significantly lower psychological distress (Diff: -1.68, p < 0.01) and higher preparedness (Diff: 3.48, p = 0.001) at Time 2. No differences were identified based on quality of end of life care or health utilisation measures. CONCLUSIONS: Family meetings may be helpful in reducing family caregiver distress and enhancing their preparedness for the caregiving role and it appears they may be conducted without increased hospital health utilisation impacts; although opportunity costs need to be considered in order to routinely offer these as a standardised intervention. Additional health economic examination is also advocated to comprehensively understand the cost-benefit implications. TRIAL REGISTRATION: Australian and New Zealand Clinical Trials Registry ACTRN12615000200583.

Characteristics of family meetings for patients with advanced disease in an Australian metropolitan tertiary hospital.

OBJECTIVES: Family meetings (FMs) between clinicians, patients and family are recommended as a valuable communication and care planning method in the delivery of palliative care. However, there is a dearth of knowledge regarding FM characteristics, with few studies describing the prevalence, circumstances and content of FMs. The aims of this study were to: (1) measure the prevalence of FMs, (2) examine circumstance and timing of FMs, and (3) explore the content of FMs. METHODS: A retrospective medical record audit was conducted of 200 patients who died in an Australian hospital of an expected death from advanced disease. Details of FMs were collected using an audit tool, along with patient demographics and admission data. RESULTS: 33 patients (16.5%) had at least one FM during their inpatient stay. The majority of FMs occurred for patients admitted to an inpatient palliative care unit (59.5%) and were most commonly facilitated by doctors (81.0%). Patient attendance was frequent (40.5%). FM content fell into six categories: medical information, supportive communication behaviours of clinicians, psychosocial support for patients and families, end-of-life discussions, discharge planning and administrative arrangements. CONCLUSIONS: Despite the benefits FMs confer, FMs appear to be infrequently used at the end of life. When FMs are used, there is a strong medical focus on both facilitation and content. Available FM documentation tools also appear to be underused. Clinicians are encouraged to have a greater understanding of FMs to optimise their use and adopt a proactive and structured approach to the conduct and documentation of FMs.

Describing the psychosocial profile and unmet support needs of parents caring for a child with a life-limiting condition: A cross-sectional study of caregiver-reported outcomes.

BACKGROUND: There is a lack of studies examining the prevalence and severity of psychosocial distress in parents caring for a child with life-limiting condition. More research is also needed to better understand the experience, support needs and quality-of-life of this population. AIM: To describe the experience and support needs of caring for children with life-limiting conditions and examine the level of distress and quality-of-life experienced by parents. DESIGN: Cross-sectional, prospective, quantitative study guided by an advisory group. Participants completed a survey that included demographics and self-report outcome measures of unmet support needs, appraisal of caregiving, psychological distress and quality-of-life. Bivariate correlation analyses were performed to examine for associations between measures. SETTING/PARTICIPANTS: Parents currently caring for one or more children (⩽18 years) with a life-limiting condition and registered with a paediatric palliative care service (Australia). RESULTS: In total, 143 parents (88% female) completed the questionnaire (36% RR). Compared with population norms, participants reported low quality-of-life, high carer burden and high psychological distress. Almost half (47%) of the sample met the criteria for one or more diagnoses of clinically elevated stress, anxiety or depression. There were significant associations between the psychosocial outcome variables; carer strain and depression had the strongest correlations with quality-of-life (r = -.63, p < .001, for both). Participants also reported multiple unmet needs related to emotional and practical support. CONCLUSIONS: This study contributes to the growing body of evidence on paediatric palliative care, specifically that parents caring for a child with a life-limiting condition report high levels of distress and burden, low quality-of-life and need more emotional and practical support targeted at their unmet needs. Paediatric palliative care services should routinely assess parent mental health and provide appropriate support.

Lived experiences of parents caring for a child with a life-limiting condition in Australia: A qualitative study.

BACKGROUND: Experiential studies in paediatric palliative care are needed to enable an ongoing international agenda which supports the development of responsive family supports. AIM: To provide an in-depth exploration of the prevalent lived experiences of parents who are currently providing care for a child with a life-limiting condition in Australia. DESIGN: Cross-sectional, prospective, qualitative study guided by an advisory group and reported according to the consolidated criteria for reporting qualitative studies. Transcripts were subjected to a thematic analysis, underpinned by an interpretative phenomenological framework. SETTING/PARTICIPANTS: Purposively sampled parents (n = 14) recruited from a statewide paediatric hospice who self-identified as a 'primary caregiver' for one or more children and/or adolescents (⩽18 years) with a life-limiting condition. RESULTS: Four key themes represented the prevalent experiences of parents: (1) trapped inside the house, (2) the protector, (3) living with the shadow and (4) travelling a different pathway. They describe parents' physical and social isolation, exclusion from the workforce, pervasive grief and associated impacts to their health and well-being. Limited professional and diminished social supports resulted in full ownership of care responsibility. Yet, parents embraced their role as 'protector', reporting acquired meaning and purpose. CONCLUSION: This study builds upon the growing body of evidence available in paediatric palliative care internationally. The key themes highlight the substantial demand for both physical and emotional support beyond what is currently offered and call for the implementation of carefully planned support services and other societal initiatives which seek to alleviate the broad health impacts to caregivers.

Establishment and preliminary outcomes of a palliative care research network.

OBJECTIVE: The difficulties in conducting palliative care research have been widely acknowledged. In order to generate the evidence needed to underpin palliative care provision, collaborative research is considered essential. Prior to formalizing the development of a research network for the state of Victoria, Australia, a preliminary study was undertaken to ascertain interest and recommendations for the design of such a collaboration. METHOD: Three data-collection strategies were used: a cross-sectional questionnaire, interviews, and workshops. The questionnaire was completed by multidisciplinary palliative care specialists from across the state (n = 61); interviews were conducted with senior clinicians and academics (n = 21) followed by two stakeholder workshops (n = 29). The questionnaire was constructed specifically for this study, measuring involvement of and perceptions of palliative care research. RESULTS: Both the interview and the questionnaire data demonstrated strong support for a palliative care research network and aided in establishing a research agenda. The stakeholder workshops assisted with strategies for the formation of the Palliative Care Research Network Victoria (PCRNV) and guided the development of the mission and strategic plan. SIGNIFICANCE OF RESULTS: The research and efforts to date to establish the PCRNV are encouraging and provide optimism for the evolution of palliative care research in Australia. The international implications are highlighted.

Benefits and resource implications of family meetings for hospitalized palliative care patients: research protocol.

BACKGROUND: Palliative care focuses on supporting patients diagnosed with advanced, incurable disease; it is 'family centered', with the patient and their family (the unit of care) being core to all its endeavours. However, approximately 30-50% of carers experience psychological distress which is typically under recognised and consequently not addressed. Family meetings (FM) are recommended as a means whereby health professionals, together with family carers and patients discuss psychosocial issues and plan care; however there is minimal empirical research to determine the net effect of these meetings and the resources required to implement them systematically. The aims of this study were to evaluate: (1) if family carers of hospitalised patients with advanced disease (referred to a specialist palliative care in-patient setting or palliative care consultancy service) who receive a FM report significantly lower psychological distress (primary outcome), fewer unmet needs, increased quality of life and feel more prepared for the caregiving role; (2) if patients who receive the FM experience appropriate quality of end-of-life care, as demonstrated by fewer hospital admissions, fewer emergency department presentations, fewer intensive care unit hours, less chemotherapy treatment (in last 30 days of life), and higher likelihood of death in the place of their choice and access to supportive care services; (3) the optimal time point to deliver FM and; (4) to determine the cost-benefit and resource implications of implementing FM meetings into routine practice. METHODS: Cluster type trial design with two way randomization for aims 1-3 and health economic modeling and qualitative interviews with health for professionals for aim 4. DISCUSSION: The research will determine whether FMs have positive practical and psychological impacts on the family, impacts on health service usage, and financial benefits to the health care sector. This study will also provide clear guidance on appropriate timing in the disease/care trajectory to provide a family meeting. TRIAL REGISTRATION: Australian New Zealand Clinical Trials Registry ACTRN12615000200583.

Use of the Preparedness for Caregiving Scale in Palliative Care: A Rasch Evaluation Study.

CONTEXT: Studies have shown that family carers who feel more prepared for the caregiver role tend to have more favorable experiences. Valid and reliable methods are needed to identify family carers who may be less prepared for the role of supporting a person who needs palliative care. OBJECTIVES: The aim of this study was to evaluate the measurement properties of the original English version and a Swedish version of the Preparedness for Caregiving Scale (PCS). METHODS: The sample (n = 674) was taken from four different intervention studies from Australia and Sweden, all focused on improving family carers' feelings of preparedness. Family carers of patients receiving palliative home care were selected, and baseline data were used. The measurement properties of the PCS were evaluated using the Rasch model. RESULTS: Both the English and Swedish versions of the PCS exhibit sound measurement properties according to the Rasch model. The items in the PCS captured different levels of preparedness. The response categories were appropriate and corresponded to the level of preparedness. No significant differential item functioning for age and sex was detected. Three items demonstrated differential item functioning by language but did not impact interpretation of scores. Reliability was high (>0.90) according to the Person Separation Index. CONCLUSION: The PCS is valid for use among family carers in palliative care. Data provide support for its use across age and gender groups as well as across the two language versions.

The development and evaluation of a multimedia resource for family carers of patients receiving palliative care: a consumer-led project.

OBJECTIVE: Previous intervention research has shown that group education sessions for carers are effective but not always feasible due to the demands of the caregiving role and the difficulty in getting carers to attend. This project was a consumer-led research initiative to develop and evaluate a multimedia resource (DVD) providing information and support for carers of people receiving palliative care. METHOD: Eight carers were recruited from a community palliative care service to form a steering committee for the project. In collaboration with two researchers, the committee discussed the topics that would be included in the resource, developed an interview guide, participated in the filmed interviews, and developed the evaluation program. The steering committee participated in a focus group as part of the evaluation to elicit their experiences of the project. An evaluation was conducted that included the following: questionnaires for 29 carers and 17 palliative care health professionals; follow-up telephone interviews with carers; a focus group with health professionals; and a focus group with the Carer Steering Committee. RESULTS: The carers and health professionals reported that the DVD was informative (93 and 94%, respectively), realistic (96 and 88%), supportive (93 and 88%), and helpful (83 and 100%). All health professionals and carers reported that they would recommend the resource to carers. Carers on the steering committee reported substantial benefits that involved the opportunity to help others and to openly discuss and reflect on their experiences. SIGNIFICANCE OF RESULTS: This is an important resource that can be utilized to support family carers and introduce palliative care. Currently, 1500 copies have been distributed to palliative care services and professionals nationwide and is available online at centreforpallcare.org/index.php/resources/carer_dvd/. Development of this DVD represents a strong collaboration between carers and researchers to produce a resource that is informative, supportive, and meaningful.

Reducing the psychological distress of family caregivers of home based palliative care patients: longer term effects from a randomised controlled trial.

BACKGROUND: Palliative care incorporates comprehensive support of family caregivers because many of them experience burden and distress. However, evidence-based support initiatives are few. PURPOSE: We evaluated a one-to-one psychoeducational intervention aimed at mitigating the distress of caregivers of patients with advanced cancer receiving home-based palliative care. We hypothesised that caregivers would report decreased distress as assessed by the General Health Questionnaire (GHQ). METHOD: A randomised controlled trial comparing two versions of the delivery of the intervention (one face-to-face home visit plus telephone calls versus two visits) plus standard care to a control group (standard care only) across four sites in Australia. RESULTS: Recruitment to the one visit condition was 57, the two visit condition 93, and the control 148. We previously reported non-significant changes in distress between times 1 (baseline) and 2 (1-week post-intervention) but significant gains in competence and preparedness. We report here changes in distress between times 1 and 3 (8-week post-death). There was significantly less worsening in distress between times 1 and 3 in the one visit intervention group than in the control group; however, no significant difference was found between the two visit intervention and the control group. CONCLUSIONS: These results are consistent with the aim of the intervention, and they support existing evidence demonstrating that relatively short psychoeducational interventions can help family caregivers who are supporting a dying relative. The sustained benefit during the bereavement period may also have positive resource implications, which should be the subject of future inquiry.

Risk factors for developing prolonged grief during bereavement in family carers of cancer patients in palliative care: a longitudinal study.

CONTEXT: Family carers of palliative care patients report high levels of psychological distress throughout the caregiving phase and during bereavement. Palliative care providers are required to provide psychosocial support to family carers; however, determining which carers are more likely to develop prolonged grief (PG) is currently unclear. OBJECTIVES: To ascertain whether family carers reporting high levels of PG symptoms and those who develop PG disorder (PGD) by six and 13 months postdeath can be predicted from predeath information. METHODS: A longitudinal study of 301 carers of patients receiving palliative care was conducted across three palliative care services. Data were collected on entry to palliative care (T1) on a variety of sociodemographic variables, carer-related factors, and psychological distress measures. The measures of psychological distress were then readministered at six (T2; n=167) and 13 months postdeath (T3; n=143). RESULTS: The PG symptoms at T1 were a strong predictor of both PG symptoms and PGD at T2 and T3. Greater bereavement dependency, a spousal relationship to the patient, greater impact of caring on schedule, poor family functioning, and low levels of optimism also were risk factors for PG symptoms. CONCLUSION: Screening family carers on entry to palliative care seems to be the most effective way of identifying who has a higher risk of developing PG. We recommend screening carers six months after the death of their relative to identify most carers with PG.

Liquid hyper-absorption as a cause of increased DTPA clearance in the cystic fibrosis airway.

BACKGROUND: Airway liquid hyper-absorption is a key pathophysiological link between the genetic mutations of cystic fibrosis (CF) and the development of lung disease. Here we consider whether the clearance of radiolabeled diethylene triamine pentaacetic acid (DTPA) might be used to detect changes in airway liquid absorption. METHODS: Tc99m-DTPA was added to the apical (luminal) surface of primary human bronchial epithelial cell cultures from CF and non-CF lungs. Liquid absorption rates were assessed using an optical method and compared to DTPA absorption rates. Measurements of transepithelial electrical resistance (TER) were made to determine the effect of epithelial permeability. DTPA absorption was assessed after stimuli known to influence liquid absorption (volume addition and osmotic gradients) and in cultures containing different proportions of CF and non-CF cells. RESULTS: DTPA absorption rate was increased in CF cultures matching previous in vivo studies in individuals with CF. DTPA and liquid absorption rates were proportional. There was no relationship between TER and DTPA absorption rate when measured in individual cultures. Apical volume addition increased both DTPA and liquid absorption rates. DTPA absorption increased in a dose-dependent manner after basolateral mannitol addition was used to create transepithelial osmotic gradients favoring liquid absorption. Conversely, apical mannitol (a candidate therapy) slowed DTPA absorption in CF cultures. CONCLUSIONS: These results imply that DTPA absorption is directly related to liquid absorption, consistent with increased rates of airway surface liquid absorption in the CF airway, and that modification of liquid absorption from osmotic therapies might be detectable through DTPA absorption measurements in vivo. TRIAL REGISTRATION: none.

Multisite comparison of mucociliary and cough clearance measures using standardized methods.

BACKGROUND: A standardized protocol for measuring mucociliary (MCC) and cough clearance (CC) was developed and tested at the University of North Carolina at Chapel Hill, NC (UNC), Johns Hopkins University (JHU), and the University of Pittsburgh (Pitt). METHODS: A total of 50 healthy nonsmoking adults with normal lung function were studied at the three sites: 30 [21 males/9 females (21M/9F)] at UNC, 10 (6M/4F) at JHU, and 10 (4M/6F) at Pitt. Subjects inhaled an aerosol of (99m)technetium sulfur colloid in 0.9% saline (mass median aerodynamic diameter=5.4 µm) under controlled breathing conditions (500 mL/sec, 30 breaths/min) by following a metronome and flow signal from a commercial dosimeter. Following inhalation, subjects sat in front of a gamma camera as sequential lung images were acquired for 60 min. Subjects then coughed 60 times, and images were acquired after each set of 20 coughs, i.e., at 70, 80, and 90 min. Subjects returned to the laboratory approximately 24 hr later for a final image of residual lung activity. Initial aerosol distribution was measured as a central/peripheral (C/P) ratio of activity. MCC/CC was expressed as the area under the retention versus time curve over 90 min (AUC90). RESULTS: A multivariate analysis of clearance versus time with site and C/P as covariates showed no significant site-specific differences. Interestingly, MCC/CC was greater in females (n=19) versus males (n=31), with AUC90=0.84 ± 0.11 and 0.90±0.07, respectively (p=0.03), for the combined data set from all sites (not significant for any given site). There were no gender differences for either C/P ratio or 24-hr clearance. CONCLUSIONS: This standardized protocol may prove beneficial in multicenter trials for testing new therapies that are designed to improve MCC/CC.

Reducing the psychological distress of family caregivers of home-based palliative care patients: short-term effects from a randomised controlled trial.

BACKGROUND: Palliative care is expected to incorporate comprehensive support for family caregivers given that many caregivers suffer psychological morbidity. However, systematically implemented evidence-based psychological support initiatives are lacking. AIM: The objective of this study was to prepare caregivers for the role of supporting a patient with advanced cancer receiving home-based palliative care by offering a one-to-one psycho-educational intervention. We hypothesised that primary family caregivers who participated in the intervention would report decreased psychological distress (primary outcome), fewer unmet needs and increased levels of perceived preparedness, competence and positive emotions. METHODS: A three-arm randomised controlled trial was conducted comparing two versions of the intervention (one face-to-face visit versus two visits) plus standard care to a control group (standard care) across four sites in Australia. RESULTS: A total of 298 participants were recruited; 148 were in the Control condition, 57 in Intervention 1 (one visit) and 93 in Intervention 2 (two visits). Relative to participants in the control group; the psychological well-being of participants in the intervention condition was improved by a small amount but non-significantly. No significant reduction in unmet needs or improvements in positive aspects of caregiving amongst the intervention group were identified. However, the intervention demonstrated significant improvements in participants' levels of preparedness and competence for Intervention 2. CONCLUSION/IMPLICATIONS: This research adds to accumulating body of evidence demonstrating that relatively short psycho-educational interventions can enable family caregivers to feel more prepared and competent in the role of supporting a dying relative. Further investigation is required to determine the longer term outcomes of such interventions.

Subclinical increased anterior stromal reflectivity with topical taprenepag isopropyl.

PURPOSE: To assess the effect of topical taprenepag isopropyl on each layer of the cornea by confocal microscopy. METHODS: Thirty-two ocular hypertensive or glaucoma patients were randomized into a 2-period, crossover study of 14 days of 0.1% taprenepag alone and in unfixed combination with 0.005% latanoprost (combination therapy). Baseline and sequential slit-lamp biomicroscopy, fluorescein staining, central ultrasonic pachymetry, and confocal microscopy were performed. Confocal images were analyzed for the density of the central superficial and basal epithelium, midstromal keratocytes, and endothelium, as well as endothelial coefficient of variation and percentage of hexagonal cells, and reflectivity of anterior stromal and midstromal layers. RESULTS: Corneal staining increased from baseline, reaching a peak at day 13 (69% and 63% of subjects treated with monotherapy and combination therapy, respectively), which resolved by day 35. A statistically significant increase in mean corneal thickness for both eyes and both treatments occurred on days 7 and 13 (range, 20-27 µm; P < 0.001) but recovered (≤ 6 µm) by day 35. No statistically significant changes were observed in the basal epithelial, midstromal, or endothelial cells. Mean ratio of average reflectivity of anterior stroma to midstroma increased on days 13 and 35 in period 1 for each treatment (range, 1.2-1.9; P < 0.001), and this increase persisted during period 2. CONCLUSIONS: Anterior stromal reflectivity may remain increased even when biomicroscopic and confocal images of corneal layers remain normal or have recovered after topical taprenepag. This subclinical measure may be useful to detect a persistent adverse effect of a topical agent on the cornea.

Imaging the postdeposition dispersion of an inhaled surfactant aerosol.

BACKGROUND: Aerodynamic forces provide the primary means of distributing aerosol medications within the lungs. Partial airway obstructions can limit both air flow and aerosol penetration into diseased zones. We hypothesize that low surface tension additives may help to disperse aerosol medications after deposition in the airways, improving dose uniformity and drug delivery to underventilated regions. To test this, we performed a pilot scintigraphy study of surfactant and saline deposition and postdeposition dispersion. METHODS: Because inhaled antibiotics for cystic fibrosis provide an example of where self-dispersing medications may be useful, we administered calfactant and saline aerosols with added Technetium 99m sulfur colloid (Tc-SC; 100 nm filtered) on different days in randomized order to eight cystic fibrosis (CF) subjects (average FEV(1)%, p=85 ± 12%). Nebulized delivery was matched (similar aerosol sizes and volume delivery rates, fixed breathing patterns). Tc-SC distribution in the lungs was imaged continuously for 30 min after delivery. RESULTS: Both aerosols were well tolerated. Aerosol distribution was mostly peripheral (58/42%) and initially similar for saline and surfactant. Changes in whole lung counts after 30 min were also similar. Peripheral lung activity decreased more rapidly on average with calfactant though the difference versus saline was not statistically significant. Central to peripheral count ratio decreased with saline and increased with calfactant and c/p changes approached significance (-0.05 ± 0.16 vs. 0.10 ± 0.10; p=0.07 Wilcoxon). CONCLUSIONS: Our results lack statistical significance, but suggest that inhaled calfactant increased peripheral clearance, due to either surfactant-based dispersion or mucociliary effects. Further studies are needed to define the potential for low surface tension carriers to improve drug delivery.