Nursing - Research Publications
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ItemIncreased retinal venular calibre in acute infections(NATURE PORTFOLIO, 2021-08-26)Population-based studies have demonstrated that increased retinal venular calibre is a risk factor for cardiac disease, cardiac events and stroke. Venular dilatation also occurs with diabetes, obesity, dyslipidemia and autoimmune disease where it is attributed to inflammation. This study examined whether the inflammation associated with infections also affected microvascular calibre. Participants with infections and CRP levels > 100 mg/L were recruited from the medical wards of a teaching hospital and assisted to complete a demographic and vascular risk factor questionnaire, and to undergo non-mydriatic retinal photography (Canon CR5-45NM, Japan). They were then treated with appropriate antibiotics, and underwent repeat retinal imaging when their CRP levels had fallen to less than 100 mg/L. Retinal images were examined for arteriole and venular calibre using validated semi-automated software based on Knudtson's modification of the Parr-Hubbard formula (IVAN, U Wisconsin). Differences in inflammatory markers and calibre were examined using the paired t-test for continuous variables. Determinants of calibre were calculated from multiple linear regression analysis. Forty-one participants with respiratory (27, 66%), urinary (6, 15%), skin (5, 12%), or miscellaneous (3, 7%) infections were studied. After antibiotic treatment, participants' mean CRP levels fell from 172.9 ± 68.4 mg/L to 42.2 ± 28.2 mg/L (p < 0.0001) and mean neutrophil counts fell from 9 ± 4 × 109/L to 6 ± 3 × 109/L (p < 0.0001). The participants' mean venular calibre (CRVE) decreased from 240.9 ± 26.9 MU to 233.4 ± 23.5 MU (p = 0.0017) but arteriolar calibre (CRAE) was unchanged (156.9 ± 15.2 MU and 156.2 ± 16.0 MU, p = 0.84). Thirteen additional participants with infections had a CRP > 100 mg/L that persisted at review (199.2 ± 59.0 and 159.4 ± 40.7 mg/L, p = 0.055). Their CRAE and CRVE were not different before and after antibiotic treatment (p = 0.96, p = 0.78). Hospital inpatients with severe infections had retinal venular calibre that decreased as their infections resolved and CRP levels fell after antibiotic treatment. The changes in venular calibre with intercurrent infections may confound retinal vascular assessments of, for example, blood pressure control and cardiac risk.
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ItemResuscitation status and characteristics and outcomes of patients transferred from subacute care to acute care hospitals: A multi-site prospective cohort study(WILEY, 2020-04)AIMS AND OBJECTIVES: To examine the relationship between resuscitation status and (i) patient characteristics; (ii) transfer characteristics; and (iii) patient outcomes following an emergency inter-hospital transfer from a subacute to an acute care hospital. BACKGROUND: Patients who experience emergency inter-hospital transfers from subacute to acute care hospitals have high rates of acute care readmission (81%) and in-hospital mortality (15%). DESIGN: This prospective, exploratory cohort study was a subanalysis of data from a larger case-time-control study in five Health Services in Victoria, Australia. There were 603 transfers in 557 patients between August 2015 and October 2016. The study was conducted in accordance with the STrengthening the Reporting of OBservational studies in Epidemiology guidelines. METHODS: Data were extracted by medical record audit. Three resuscitation categories (full resuscitation; limitation of medical treatment (LOMT) orders; or not-for-cardiopulmonary resuscitation (CPR) orders) were compared using chi-square or Kruskal-Wallis tests. Stratified multivariable proportional hazard Cox regression models were used to account for health service clustering effect. FINDINGS: Resuscitation status was 63.5% full resuscitation; 23.1% LOMT order; and 13.4% not-for-CPR. Compared to patients for full resuscitation, patients with not-for-CPR or LOMT orders were more likely to have rapid response team calls during acute care readmission or to die during hospitalisation. Patients who were not-for-CPR were less likely to be readmitted to acute care and more likely to return to subacute care. CONCLUSIONS: Two-thirds of patients in subacute care who experienced an emergency inter-hospital transfer were for full resuscitation. Although the proportion of patients with LOMT and not-for-CPR orders increased after transfer, there were deficiencies in the documentation of resuscitation status and planning for clinical deterioration for subacute care patients. RELEVANCE TO CLINICAL PRACTICE: As many subacute care patients experience clinical deterioration, patient preferences for care need to be discussed and documented early in the subacute care admission.
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ItemNurses' role in recognising and responding to clinical deterioration in surgical patients(WILEY, 2018-05)AIM AND OBJECTIVES: To explore nurse' role in recognising and responding to deteriorating post-operative patients. BACKGROUND: Clinical deterioration is a significant problem in acute care settings. Nurses play a vital role in post-operative patient monitoring; however, there is limited understanding of the nurses' role in recognising and responding to clinical deterioration in surgical patients. METHODS: This qualitative exploratory study was conducted at a metropolitan teaching hospital in Melbourne, Australia. Data were collected through focus groups from 1 September to 31 October 2014. Four focus groups of 2-5 surgical nurses (n = 14) were conducted to explore the nurses' perception of their role in managing deterioration over the first 72 hr postoperatively. Qualitative data were recorded, transcribed and key themes identified. RESULTS: Nurses demonstrated a high level of awareness of their role in recognising and responding to early signs of deterioration. The themes that arose from the focus group interviews were "struggling with blood pressure," and "we know our patient is sick." The nurses were confident about the clinical indicators of deterioration and the appropriate channels to use to escalate care. Using track and trigger observation charts enabled nurses to identify deteriorating patients prior to the patient fulfilling rapid response system escalation criteria. CONCLUSIONS: These findings highlight the importance of a collective team approach to preventing, recognising and responding to clinical deterioration across the whole patient journey. Initiatives to ensure accurate written and verbal communication between medical and nursing staff warrants further assessment. RELEVANCE TO CLINICAL PRACTICE: Nurses working in acute surgical wards are highly engaged in the process of recognising and responding to clinical deterioration in post-operative patients. Many nurses reported being able to anticipate deterioration occurring but are required by current organisational frameworks to escalate care to rapid response systems. How nurses anticipate and manage deterioration prior to the patient fulfilling rapid response system criteria warrants further investigation.
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ItemFrequency, nature and timing of clinical deterioration in the early postoperative period(WILEY, 2018-10)AIMS AND OBJECTIVES: To establish the frequency of clinical deterioration in the early postoperative period in patients who have undergone general or orthopaedic surgery. BACKGROUND: Worldwide, clinical deterioration is a significant problem in acute care settings. Early recognition and response to clinical deterioration is one of the ten National Safety and Quality Health Service Standards in Australia. However, there is limited understanding of the frequency of clinical deterioration in surgical patients. METHODS: A point prevalence study was conducted from September-October 2014. The records of 100 consecutive in patients admitted for orthopaedic (n = 48) or general surgery (n = 52) to a health service in Melbourne, Australia, were audited. The frequency of clinical deterioration episodes was summarised using descriptive statistics. RESULTS: Baseline characteristics of the two patient groups were equivalent except that orthopaedic patients were older than the general surgery patients (median age 71 [IQR 19] years vs. 62 [IQR 17] years). There were 17 medical emergency team calls and 23 calls for urgent clinical review in 28 patients. The main indications for emergency calls were hypotension (26%), fever (19%), hypoxia (15%), tachycardia (13%) and altered blood glucose level (11%). The majority of episodes were managed on the ward, and there were one ICU transfer and no cardiac arrest calls. CONCLUSION: One in four patients experienced early postoperative clinical deterioration. Hypotension was the most common trigger for escalation of care highlighting a need to optimise fluid and haemodynamic management of postoperative patients. RELEVANCE TO CLINICAL PRACTICE: Haemodynamic instability leading to the activation of rapid response systems is very common in the immediate postoperative period. There is the need for locally tailored interventions to optimise fluid management and decrease incidence of further complications.
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ItemPaediatric nurses', children's and parents' adherence to infection prevention and control and knowledge of antimicrobial stewardship: A systematic review.(Elsevier BV, 2021-05)INTRODUCTION: Infection prevention and control precautions help to decrease microbial transmission, and through the appropriate use of antibiotics, Antimicrobial Stewardship programs aim to decrease the prevalence and emergence of Antimicrobial Resistance. METHODS: A systematic review was undertaken to critically appraise and synthesise evidence for nurses', children's and parents' knowledge and understanding of antimicrobial stewardship, and of infection prevention and control in acute paediatric care settings. The Preferred Reporting Items for Systematic reviews and Meta-Analyses guided the review. Studies were included if they examined the factors that contributed to nurses' adherence to, or consumers' practice in relation to, antimicrobial stewardship and infection prevention and control. RESULTS: Of the 16,957 papers identified, 50 studies conducted in acute paediatric settings met the eligibility criteria, and were included. Most studies were of low methodological quality. Fourteen studies evaluated nurses' knowledge and self-reported adherence to Infection Prevention and Control principles and identified consistent practice gaps by nurses. Six studies evaluating the effectiveness of education programs reported modest improvements in nurses' knowledge and adherence to infection prevention and control. There were 15 studies, that investigated consumers' involvement in infection prevention and control that identified the following themes: Consumer knowledge and attitudes to infection prevention and control and transmission-based precautions, and parents' willingness to take an active role in infection prevention. Six studies focused on paediatric nurses' role in antimicrobial stewardship, exploring the following themes: (1) nurses' understanding and beliefs of antimicrobial stewardship roles, and (2) barriers to nurses taking a greater role in antimicrobial stewardship. Nine studies explored the role of consumers in antimicrobial stewardship and identified consumers' misconceptions about the benefits and downplayed concerns regarding antibiotic use. DISCUSSION: Although consumers articulated a willingness to be actively involved in infection prevention, observed practice remained lower than that required to consistently prevent infection transmission. CONCLUSION: These findings highlight a critically important gap in current practice. In relation to optimal use of antimicrobials, although paediatric nurses were involved in supporting antimicrobial stewardship processes and educating consumers, they identified limited antimicrobial stewardship knowledge. Consumers appeared to lack understanding about the benefits of antibiotics and negated concerns regarding antibiotic use.
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ItemSix-year trends in postoperative prescribing and use of multimodal analgesics following total hip and knee arthroplasty: A single-site observational study of pain management(WILEY, 2021-01)Background Guidelines for acute postoperative pain management recommend administering analgesics in multimodal combination to facilitate synergistic benefit, reduce opioid requirements and decrease side‐effects. However, limited observational research has examined the extent to which multimodal analgesics are prescribed and administered postoperatively following joint replacement. Methods In this longitudinal study, we used three‐point prevalence surveys to observe the 6‐year trends in prescribing and use of multimodal analgesics on the orthopaedic wards of a single Australian private hospital. We collected baseline postoperative data from total hip and knee arthroplasty patients in May/June 2010 (Time 1, n = 86), and follow‐up data at 1 year (Time 2, n = 199) and 5 years (Time 3, n = 188). During the follow‐up, data on prescribing practices were presented to anaesthetists. Results We found a statistically significant increase in the prescribing (p < 0.001) and use (p < 0.001) of multimodal analgesics over time. The use of multimodal analgesics was associated with lower rest pain (p = 0.027) and clinically significant reduction in interference with activities (p < 0.001) and sleep (p < 0.001). However, dynamic pain was high and rescue opioids were likely under‐administered at all time points. Furthermore, while patients reported high levels of side‐effects, use of adjuvant medications was low. Conclusions We observed significant practice change in inpatient analgesic prescribing in favour of multimodal analgesia, in keeping with contemporary recommendations. Surveys, however, appeared to identify a clinical gap in the bedside assessment and management of breakthrough pain and medication side‐effects, requiring additional targeted interventions. Significance Evaluation of 6‐year trends in a large Australian metropolitan private hospital indicated substantial growth in postoperative multimodal analgesic prescribing. In the context of growing global awareness concerning multimodal analgesia, findings suggested diffusion of best‐evidence prescribing into clinical practice. Findings indicated the effects of postoperative multimodal analgesia in real‐world conditions outside of experimental trials. Postoperative multimodal analgesia in the clinical setting was only associated with a modest reduction in rest pain, but substantially reduced interference from pain on activities and sleep.
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ItemRelationship between health-related quality of life, and acute care re-admissions and survival in older adults with chronic illness(BMC, 2013-08-06)BACKGROUND: Australia's ageing population means that there is increasing emphasis on developing innovative models of health care delivery for older adults. The assessment of the most appropriate mix of services and measurement of their impact on patient outcomes is challenging. The aim of this evaluation was to describe the health related quality of life (HRQoL) of older adults with complex needs and to explore the relationship between HRQoL, readmission to acute care and survival. METHODS: The study was conducted in metropolitan Melbourne, Australia; participants were recruited from a cohort of older adults enrolled in a multidisciplinary case management service. HRQoL was measured at enrolment into the case-management service using The Assessment of Quality of Life (AQoL) instrument. In 2007-2009, participating service clinicians approached their patients and asked for consent to study participation. Administrative databases were used to obtain data on comorbidities (Charlson Comorbidity Index) at enrolment, and follow-up data on acute care readmissions over 12 months and five year mortality. HRQoL was compared to aged-matched norms using Welch's approximate t-tests. Univariate and multivariate logistic regression models were used to explore which patient factors were predictive of readmissions and mortality. RESULTS: There were 210 study participants, mean age 78 years, 67% were female. Participants reported significantly worse HRQoL than age-matched population norms with a mean AQOL of 0.30 (SD 0.27). Seventy-eight (38%) participants were readmitted over 12-months and 5-year mortality was 65 (31%). Multivariate regression found that an AQOL utility score <0.37 (OR 1.95, 95%CI, 1.03 - 3.70), and a Charlson Comorbidity Index ≥6 (OR 4.89, 95%CI 2.37 - 10.09) were predictive of readmission. Multivariate analysis demonstrated that age ≥80 years (OR 7.15, 95%CI, 1.83 - 28.02), and Charlson Comorbidity Index ≥6 (OR 6.00, 95%CI, 2.82 - 12.79) were predictive of death. CONCLUSION: This study confirms that the AQoL instrument is a robust measure of HRQoL in older community-dwelling adults with chronic illness. Lower self-reported HRQoL was associated with an increased risk of readmission independently of comorbidity and kind of service provided, but was not an independent predictor of five-year mortality.
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ItemMicrovascular retinopathy and angiographically-demonstrated coronary artery disease: A cross-sectional, observational study(PUBLIC LIBRARY SCIENCE, 2018-05-08)Epidemiological studies suggest retinal microvascular abnormalities predict cardiac events. This study examined microvascular features associated with coronary artery abnormalities. This was a single-centre, cross-sectional, observational study of 144 consecutive subjects undergoing coronary angiography for clinical indications. Their angiograms were deidentified and graded for disease (Leaman score, LAD stenosis ≥ 70%, number of vessels stenosed ≥ 70%), and Thrombolysis in Myocardial Infarction (TIMI) blush score. Subjects also underwent retinal photography (KOWA non-mydriatic camera, Japan), and their deidentified retinal images were graded for hypertensive microvascular retinopathy (Wong and Mitchell classification), vessel calibre using a computer-assisted method (IVAN, U Wisconsin), and diabetic retinopathy (modified Airlie House scheme) independently by a trained grader and an ophthalmologist. Retinal abnormalities were compared between subjects with high and low angiography scores using one way ANOVA, Chi squared and logistic regression analysis (StataCorp, Texas). Subjects had a mean age of 61 years (range 32-88), and included 101 males (70%). Seventeen (12%) had Leaman scores > 10.5, 46 (32%) had LAD stenosis, 13 (9%) had ≥ 3 arteries stenosed, and 20 (14%) had TIMI blush scores < 1. Twenty-six subjects (18%) had a retinal hemorrhage, and 115 (74%) a mild or moderate hypertensive retinopathy. Fifty-five (38%) had diabetes, and 24 (17%) a background (n = 20) or proliferative (n = 4) diabetic retinopathy. A retinal hemorrhage (p = 0.046), moderate microvascular retinopathy (p = 0.08) and proliferative diabetic retinopathy (p = 0.04) were all associated with a higher Leaman score. Venular calibre was increased with triple vessel disease (205.7 ± 21.6 μm, and 193.7 ± 22.3 μm in normals, p = 0.03). Diabetic retinopathy correlated with an increased TIMI blush score (p = 0.01). Retinal microvascular imaging warrants further evaluation in identifying the presence, extent and nature of coronary artery disease.
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ItemMicrovascular narrowing and BP monitoring: A single centre observational study(PUBLIC LIBRARY SCIENCE, 2019-03-14)INTRODUCTION: Half of all hypertensive individuals have inadequately-controlled BP because monitoring methods are ineffective. This single centre study examined consecutive subjects undergoing 24 hour BP measurements for clinic and ambulatory BP levels, and for end-organ damage (retinal microvascular abnormalities and left ventricular hypertrophy, LVH, > 1.1 cm). Retinal images were graded for microvascular retinopathy (Wong and Mitchell classification), and vessel calibre using a semiautomated method. Features were compared using chi-squared, Fisher's exact or the student's t test. METHODS: One hundred and thirty-one individuals (59 male, 45.0%, mean age 61.7 ± 14.5 years) were studied. Ninety-nine (76.2%) had a clinic BP ≥ 140/90 mm Hg, 84 (64.6%) had a mean awake systolic BP ≥ 135 mm Hg, 100 (76.9%) had a mean sleeping systolic BP ≥ 120 mm Hg, and 100 (76.2%) had abnormal nocturnal BP dipping patterns. Sixty-nine individuals had undergone echocardiography and 23 (33.3%) had LVH. RESULTS: All participants had a mild (88.5%) or moderate (11.5%) microvascular retinopathy. Moderate microvascular retinopathy was found in 86.7% of those with a mean awake systolic BP ≥135 mm Hg (p = 0.058) but was not associated with other abnormal BP measurements, abnormal dipping patterns or LVH. However retinal arteriole calibre was reduced in subjects with a mean 24 hour awake systolic BP ≥ 135 mm Hg (p = 0.05). Retinal arteriole calibre was smaller in subjects with LVH (128.1 ± 13.5 μm compared with 137.6 ± 14.1 μm in normals, p = 0.014). Venular calibre was also less in subjects with LVH (185.4 ± 24.6 μm compared with 203.0 ± 27.2 μm in normals, p = 0.016). Arteriole narrowing predicted an increased risk of LVH (AUC 0.69, 95%CI 0.55 to 0.83) that was comparable with 24 hour systolic BP ≥130 mm Hg (AUC 0.68, 95%CI 0.53 to 0.82) and mean awake systolic BP ≥135 mm Hg (AUC 0.68, 95%CI 0.54 to 0.83). CONCLUSIONS: This study suggests that retinal arteriole narrowing may be equally accurate in predicting LVH as any clinic or ambulatory BP measurement. The convenience and accuracy of microvascular calibre measurement mean that it should be investigated further for a role in routine hypertension assessment and monitoring.
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ItemPatient activation intervention to facilitate participation in recovery after total knee replacement (MIME): a cluster randomised cross-over trial(BMJ PUBLISHING GROUP, 2019-10)BACKGROUND: Patient participation in care is a fundamental element of safe and high-quality healthcare with the potential to enhance health outcomes and improve patient satisfaction. OBJECTIVES: To test the efficacy of a clinician-facilitated, bedside multimedia (MyStay) intervention designed to support patient participation in their recovery after total knee replacement surgery. The primary outcome was patients' reported worst pain intensity on postoperative day 3. Secondary outcomes were patient activation, length of hospital stay, knee function and satisfaction with care. METHODS: Unmasked, cluster randomised, four-period cross-over trial with a simultaneous process evaluation within in a large private, not-for-profit, metropolitan teaching hospital. Statistical analyses used linear mixed models with random effects for wards, cohorts within wards and patients within cohorts and fixed effects for treatment and period. RESULTS: 241 patients were recruited between March 2014 and June 2015. Patients were admitted to intervention (104) or control (137) clusters. Intervention group patients reported significantly lower mean pain intensity scores on postoperative day 3 (6.1 vs 7.1, 95% CI -1.94 to -0.08, p=0.04). The percentages of patients who reported severe pain (score ≥7) were 43.7% and 64.2% in the intervention and control groups, respectively (χ2 9.89, p=0.002; generalised linear mixed model Wald test, p=0.05). Intervention group patients on average stayed in hospital one less day (5.3 vs 6.3, 95% CI 0.05 to 1.94, p=0.04), reported higher activation (45.1% vs 27.1% at level 4 activation) (p=0.04) and higher overall satisfaction with care (9.3 vs 8.6, 95% CI 1.09 to 0.219, p=0.01), and were more likely to refer family or friends to the health service (9.3 vs 8.7, 95% CI 1.07 to 0.13, p=0.02). CONCLUSION: The clinician-facilitated, MyStay bedside multimedia intervention enhanced patients' activation and participation in their care after surgery; pain intensity and length of stay in hospital were reduced and patients were more satisfied with their care. TRIAL REGISTRATION: ACTRN12614000340639 (http://www.anzctr.org.au/default.aspx).