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Howell K, Garvan C, Amini S, Kamyszek RW, Tighe P, Price CC, Spiess BD. Association Between Preoperative Anemia and Cognitive Function in a Large Cohort Study of Older Patients Undergoing Elective Surgery. Anesth Analg 2024:00000539-990000000-00859. [PMID: 38985884 DOI: 10.1213/ane.0000000000006998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/12/2024]
Abstract
BACKGROUND The etiology of anemia has tremendous overlap with the disease states responsible for cognitive decline. We used data from a perioperative database of older adults undergoing elective surgery with anesthesia to (1) examine relationships among preoperative anemia blood markers, preoperative screeners of cognitive function, and chronic disease status; and (2) examine the relationship of these factors with operative outcomes. The primary goal of this study was to investigate the association between preoperative anemia blood markers and cognition measured by a preoperative cognitive screener. Secondary goals were to (1) examine the relationship between preoperative anemia blood markers and chronic disease states (ie, American Society of Anesthesiologists [ASA] and frailty), and (2) investigate the relationship of preoperative anemia blood markers and cognition with operative outcomes (ie, discharge disposition, 1-year mortality, number of surgical complications, length of hospital stay, and length of intensive care unit [ICU] stay). METHODS Data were collected at the University of Florida Health Shands Presurgical Center and the Perioperative Cognitive Anesthesia Network clinic within the electronic medical record. Patients 65 years of age or older were included if they had a preoperative hemoglobin (Hgb) value and a preoperative screening. Nonparametric methods were used for bivariate analysis. Logistic regression was used for the simultaneous examination of variables associated with nonhome discharge and 1-year mortality. Primary outcomes were discharge disposition and 1-year mortality. Secondary outcomes were number of surgical complications and length of hospital and ICU stay. RESULTS Of 14,795 patients cognitively assessed, 8643 met the inclusion criteria. Of these, 26.7% were anemic, with 16.8%, 9.5%, and 0.4% having mild, moderate, and severe anemia, respectively. The Spearman correlation coefficient [95% confidence interval, CI] between the Hgb level and the clock drawing time (CDT) was -.15 [-.17 to -.13] (P < .0001) indicating that a lower Hgb level was associated with cognitive vulnerability. Hgb was also negatively correlated with the ASA physical status classification, patient Fried Frailty Index, and hospital and ICU length of stay. In the multivariable model, age, surgical service, ASA and Fried Frailty Index significantly predicted nonhome discharge. Furthermore, age, surgical service, ASA, Fried Frailty Index, and Hgb independently predicted death within 1 year of surgery. The odds of death, adjusted for ASA, Fried Frailty, and covariates, were 2.7 times higher for those in the mild anemic group compared to those who were not anemic (odds ratio [OR], 2.7, 95% CI, [2.1-3.5]). The odds of death, adjusted for ASA, Fried Frailty, and covariates, were 3.6 times higher for those in the moderate/severe anemic group compared to those who were not anemic (OR, 3.6, 95% CI, [2.7-4.9]). CONCLUSIONS In this first medicine study, we established relationships among anemia, preoperative markers of frailty and cognition, and chronic disease states in a large cohort of older patients undergoing elective surgery in a large tertiary medical center. We found that anemia, cognitive vulnerability, and chronic health disease states predicted death within 1 year of surgery, and that these preoperative factors negatively contribute to surgical outcomes such as time in the ICU, length of hospital stay, nonhome discharge, and 1-year mortality. The World Health Organization (WHO) and many academic medical societies have urged the adoption of patient blood management (PBM) disciplines, yet anemia is not routinely optimized as a preoperative risk factor. Given the well-defined association between preoperative anemia and postoperative morbidity and mortality, performing elective surgery on an untreated anemic patient should be considered substandard care. With established safe and effective treatment regimens, iron deficiency anemia is a modifiable preoperative risk factor that should be addressed before elective surgery.
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Affiliation(s)
- Keith Howell
- From the Department of Anesthesiology, University of Florida College of Medicine, Gainesville, Florida
| | - Cynthia Garvan
- From the Department of Anesthesiology, University of Florida College of Medicine, Gainesville, Florida
| | - Shawna Amini
- Department of Neurosurgery, University of Florida College of Medicine, Gainesville, Florida
| | - Reed W Kamyszek
- From the Department of Anesthesiology, University of Florida College of Medicine, Gainesville, Florida
| | - Patrick Tighe
- From the Department of Anesthesiology, University of Florida College of Medicine, Gainesville, Florida
| | - Catherine C Price
- Department of Neurosurgery, University of Florida College of Medicine, Gainesville, Florida
| | - Bruce D Spiess
- From the Department of Anesthesiology, University of Florida College of Medicine, Gainesville, Florida
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2
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Choffat D, Rossel JB, Aujesky D, Vollenweider P, Baumgartner C, Méan M. Association of pharmacologic thromboprophylaxis with clinically relevant bleeding and hospital-acquired anemia in medical inpatients: the risk stratification for hospital-acquired venous thromboembolism in medical patients study. J Thromb Haemost 2024; 22:765-774. [PMID: 38072378 DOI: 10.1016/j.jtha.2023.11.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 11/17/2023] [Accepted: 11/24/2023] [Indexed: 01/05/2024]
Abstract
BACKGROUND Pharmacologic thromboprophylaxis (pTPX) might exacerbate the risk of clinically relevant bleeding (CRB) and hospital-acquired anemia (HAA) in older multimorbid inpatients. OBJECTIVES We aimed to evaluate the association of pTPX use with CRB and HAA. METHODS We used data from a prospective cohort study conducted in 3 Swiss university hospitals. Adult patients admitted to internal medicine wards with no therapeutic anticoagulation were included. pTPX use was ascertained during hospitalization. Outcomes were in-hospital CRB and HAA. We calculated incidence rates by status of pTPX. We assessed the association of pTPX with CRB using survival analysis and with HAA using logistic regression, adjusted for infection, length of stay, and the International Medical Prevention Registry on Venous Thromboembolism bleeding risk score. RESULTS Among 1305 patients (mean age, 63.7 years; 44% women, 90% at low risk of bleeding), 809 (62%) received pTPX. The incidence of CRB was 2.4 per 1000 patient-days and was not significantly higher in patients with pTPX than in those without. We found no significant association between pTPX and CRB. HAA was frequent (20.2%) and higher in patients with pTPX than in those without (23.2% vs 15.3%). The incidence of HAA was 21.2 per 1000 patient-days and did not significantly differ between patients with pTPX and those without. We found an association between pTPX and HAA (adjusted odds ratio, 1.4; 95% CI, 1.0-2.1). CONCLUSION Our study confirmed the safety of pTPX in medical inpatients at low risk of bleeding but identified an association between pTPX and HAA. Adherence to guidelines that recommend administering pTPX to medical inpatients at increased venous thromboembolism risk and low bleeding risk is necessary.
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Affiliation(s)
- Damien Choffat
- Division of Internal Medicine, Department of Medicine, Lausanne University Hospital (Centre Hospitalier Universitaire Vaudois [CHUV]), Lausanne, Switzerland.
| | - Jean-Benoît Rossel
- Clinical Trial Unit of the Department of Clinical Research (CTU Bern), University of Bern, Bern, Switzerland
| | - Drahomir Aujesky
- Department of General Internal Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Peter Vollenweider
- Division of Internal Medicine, Department of Medicine, Lausanne University Hospital (Centre Hospitalier Universitaire Vaudois [CHUV]), Lausanne, Switzerland
| | - Christine Baumgartner
- Department of General Internal Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Marie Méan
- Division of Internal Medicine, Department of Medicine, Lausanne University Hospital (Centre Hospitalier Universitaire Vaudois [CHUV]), Lausanne, Switzerland
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Balafas S, Gagliano V, Di Serio C, Guidugli GA, Saporito A, Gabutti L, Ferrari P. Differential impact of transfusion guidelines on blood transfusion practices within a health network. Sci Rep 2023; 13:6264. [PMID: 37069210 PMCID: PMC10109235 DOI: 10.1038/s41598-023-33549-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 04/14/2023] [Indexed: 04/19/2023] Open
Abstract
Whether clinical practice guidelines have a significant impact on practice is unclear. The effect of guideline recommendations on clinical practice often a lags behind the date of publication. We evaluated by means of a data-driven approach if and when the guidelines on red blood cell transfusions (RBCTs) issued by Swiss Smarter Medicine in 2016 had an impact on RBCTs practice within a hospital network, where awareness of guidelines was promoted mainly among internal medicine specialties. Data on RBCTs performed in a Swiss hospital network from January 2014 to April 2021 were analyzed by hospital site and specialty to assess whether guidelines led to a decrease in inappropriate RBCTs. RBCTs were defined as "inappropriate" if patients had a hemoglobin level ≥ 70 g/L without or ≥ 80 g/L with significant cardiovascular comorbidities. Changes in the rate of inappropriate transfusions were analyzed with an advanced statistical approach that included generalized additive models. Overall prior to March 2017 there were more inappropriate than appropriate RBCTs, but after October 2017 the opposite could be observed. A change-point in the time trend was estimated from transfusion data to occur in the time interval between March and October 2017. This change was mainly driven by practice changes in the medical wards, while no significant change was observed in the critical care, surgical and oncology wards. Change in practice varied by hospital site. In conclusion, our results show that a significant change in the RBCTs practice at the hospital level occurred approximately 18 months after national guidelines were issued.
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Affiliation(s)
- Spyros Balafas
- University Centre of Statistics in the Biomedical Sciences CUSSB, UniSR, Milan, Italy
- Vita-Salute San Raffaele University, UniSR, Milan, Italy
| | - Vanessa Gagliano
- Department of Internal Medicine, Ente Ospedaliero Cantonale, Bellinzona, Switzerland
| | - Clelia Di Serio
- University Centre of Statistics in the Biomedical Sciences CUSSB, UniSR, Milan, Italy
- Vita-Salute San Raffaele University, UniSR, Milan, Italy
- Faculty of Biomedicine, Università Della Svizzera Italiana, Lugano, Switzerland
| | | | - Andrea Saporito
- Faculty of Biomedicine, Università Della Svizzera Italiana, Lugano, Switzerland
- Division of Anesthesiology, Ente Ospedaliero Cantonale, Bellinzona, Switzerland
| | - Luca Gabutti
- Department of Internal Medicine, Ente Ospedaliero Cantonale, Bellinzona, Switzerland
- Faculty of Biomedicine, Università Della Svizzera Italiana, Lugano, Switzerland
| | - Paolo Ferrari
- Faculty of Biomedicine, Università Della Svizzera Italiana, Lugano, Switzerland.
- Clinical School, University of New South Wales, Sydney, Australia.
- Department of Nephrology, Ente Ospedaliero Cantonale (EOC), 6900, Lugano, Switzerland.
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Chen HF, Ho TF, Kuo YH, Chien JH. Association between Anemia Severity and Ischemic Stroke Incidence: A Retrospective Cohort Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:3849. [PMID: 36900859 PMCID: PMC10001762 DOI: 10.3390/ijerph20053849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 02/17/2023] [Accepted: 02/17/2023] [Indexed: 06/18/2023]
Abstract
Stroke patients presenting with anemia at the time of stroke onset had a higher risk of mortality and development of other cardiovascular diseases and comorbidities. The association between the severity of anemia and the risk of developing a stroke is still uncertain. This retrospective study aimed to evaluate the association between stroke incidence and anemia severity (by WHO criteria). A total of 71,787 patients were included, of whom 16,708 (23.27%) were identified as anemic and 55,079 patients were anemia-free. Female patients (62.98%) were more likely to have anemia than males (37.02%). The likelihood of having a stroke within eight years after anemia diagnosis was calculated using Cox proportional hazard regression. Patients with moderate anemia had a significant increase in stroke risk compared to the non-anemia group in univariate analyses (hazard ratios [HR] = 2.31, 95% confidence interval [CI], 1.97-2.71, p < 0.001) and in adjusted HRs (adj-HR = 1.20, 95% CI, 1.02-1.43, p = 0.032). The data reveal that patients with severe anemia received more anemia treatment, such as blood transfusion and nutritional supplementation, and maintaining blood homeostasis may be important to preventing stroke. Anemia is an important risk factor, but other risk factors, including diabetes and hyperlipidemia, also affect stroke development. There is a heightened awareness of anemia's severity and the increasing risk of stroke development.
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Affiliation(s)
- Hui-Fen Chen
- Department of Nephrology, Taichung Tzu-Chi Hospital, Buddhist Tzu-Chi Medical Foundation, No. 88 Fong-Shing Rd., Taichung City 42743, Taiwan
| | - Tsing-Fen Ho
- Department of Medical Laboratory Science and Biotechnology, Central Taiwan University of Science and Technology, No. 666 Buzih Rd., Taichung City 40601, Taiwan
| | - Yu-Hung Kuo
- Department of Research, Taichung Tzu-Chi Hospital, Buddhist Tzu-Chi Medical Foundation, No. 88 Fong-Shing Rd., Taichung City 42743, Taiwan
| | - Ju-Huei Chien
- Department of Medical Laboratory Science and Biotechnology, Central Taiwan University of Science and Technology, No. 666 Buzih Rd., Taichung City 40601, Taiwan
- Department of Research, Taichung Tzu-Chi Hospital, Buddhist Tzu-Chi Medical Foundation, No. 88 Fong-Shing Rd., Taichung City 42743, Taiwan
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5
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Delaforce A, Farmer S, Duff J, Munday J, Miller K, Glover L, Corney C, Ansell G, Gutta N, Tuffaha H, Hardy J, Hurst C. Results from a type two hybrid-effectiveness study to implement a preoperative anemia and iron deficiency screening, evaluation, and management pathway. Transfusion 2023; 63:724-736. [PMID: 36807584 DOI: 10.1111/trf.17287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 12/29/2022] [Accepted: 01/13/2023] [Indexed: 02/23/2023]
Abstract
BACKGROUND Implementation of pathways to screen surgical patients for preoperative anemia and iron deficiency remains limited. This study sought to measure the impact of a theoretically informed, bespoke change package on improving the uptake of a Preoperative Anemia and Iron Deficiency Screening, Evaluation, and Management Pathway. STUDY DESIGN AND METHODS Pre-post interventional study using a type two hybrid-effectiveness design evaluated implementation. Four hundred (400) patient medical record reviews provided the dataset (200 pre- and 200-post implementation). The primary outcome measure was compliance with the pathway. Secondary outcome measures (clinical outcomes) were anemia on day of surgery, exposure to a red blood cell (RBC) transfusion, and hospital length of stay. Validated surveys facilitated data collection of implementation measures. Propensity score-adjusted analyses determined the effect of the intervention on clinical outcomes, and a cost analysis determined the economic impact. RESULTS For the primary outcome, compliance improved significantly post-implementation (Odds Ratio 10.6 [95% CI 4.4-25.5] p < .000). In secondary outcomes, adjusted analyses point estimates showed clinical outcomes were slightly improved for anemia on day of surgery (Odds Ratio 0.792 [95% CI 0.5-1.3] p = .32), RBC transfusion (Odds Ratio 0.86 [95% CI 0.41-1.78] p = .69) and hospital length of stay (Hazard Ratio 0.96 [95% CI 0.77-1.18] p = .67), although these were not statistically significant. Cost savings of $13,340 per patient were realized. Implementation outcomes were favorable for acceptability, appropriateness, and feasibility. CONCLUSION The change package significantly improved compliance. The absence of a statistically significant change in clinical outcomes may be because the study was powered to detect an improvement in compliance only. Further prospective studies with larger samples are needed. Cost savings of $13,340 per patient were achieved and the change package was viewed favorably.
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Affiliation(s)
- Alana Delaforce
- School of Nursing and Midwifery, The University of Newcastle, Callaghan, New South Wales, Australia.,Mater Health Services, South Brisbane, Queensland, Australia.,Mater Research Institute-UQ, South Brisbane, Queensland, Australia
| | - Shannon Farmer
- Department of Haematology, Royal Perth Hospital, Perth, Western Australia, Australia.,Discipline of Surgery, Medical School, The University of Western Australia, Perth, Western Australia, Australia
| | - Jed Duff
- School of Nursing and Midwifery, The University of Newcastle, Callaghan, New South Wales, Australia.,Centre for Healthcare Transformation/ School of Nursing, Queensland University of Technology, Kelvin Grove, Queensland, Australia
| | - Judy Munday
- Centre for Healthcare Transformation/ School of Nursing, Queensland University of Technology, Kelvin Grove, Queensland, Australia.,Faculty of Health and Nursing Science, The University of Agder, Kristiansand, Norway
| | - Kristin Miller
- Mater Health Services, South Brisbane, Queensland, Australia
| | - Lynne Glover
- Mater Health Services, South Brisbane, Queensland, Australia
| | - Chris Corney
- Mater Health Services, South Brisbane, Queensland, Australia
| | - Gareth Ansell
- Mater Health Services, South Brisbane, Queensland, Australia.,School of Clinical Medicine-Mater Clinical Unit, The University of Queensland, St Lucia, Queensland, Australia
| | - Naadir Gutta
- Mater Health Services, South Brisbane, Queensland, Australia.,School of Clinical Medicine-Mater Clinical Unit, The University of Queensland, St Lucia, Queensland, Australia
| | - Haitham Tuffaha
- Centre for the Business and Economics of Health, The University of Queensland, St Lucia, Queensland, Australia
| | - Janet Hardy
- Mater Health Services, South Brisbane, Queensland, Australia.,Mater Research Institute-UQ, South Brisbane, Queensland, Australia
| | - Cameron Hurst
- QIMR Berghoffer Medical Research Institute, Brisbane, Queensland, Australia
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6
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Meier JM, Tschoellitsch T. Artificial Intelligence and Machine Learning in Patient Blood Management: A Scoping Review. Anesth Analg 2022; 135:524-531. [PMID: 35977362 DOI: 10.1213/ane.0000000000006047] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Machine learning (ML) and artificial intelligence (AI) are widely used in many different fields of modern medicine. This narrative review gives, in the first part, a brief overview of the methods of ML and AI used in patient blood management (PBM) and, in the second part, aims at describing which fields have been analyzed using these methods so far. A total of 442 articles were identified by a literature search, and 47 of them were judged as qualified articles that applied ML and AI techniques in PBM. We assembled the eligible articles to provide insights into the areas of application, quality measures of these studies, and treatment outcomes that can pave the way for further adoption of this promising technology and its possible use in routine clinical decision making. The topics that have been investigated most often were the prediction of transfusion (30%), bleeding (28%), and laboratory studies (15%). Although in the last 3 years a constantly increasing number of questions of ML in PBM have been investigated, there is a vast scientific potential for further application of ML and AI in other fields of PBM.
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Affiliation(s)
- Jens M Meier
- From the Department of Anesthesiology and Critical Care Medicine, Kepler University, Hospital GmbH and Johannes Kepler University, Linz, Austria
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7
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Hofmann A, Shander A, Blumberg N, Hamdorf JM, Isbister JP, Gross I. Patient Blood Management: Improving Outcomes for Millions While Saving Billions. What Is Holding It Up? Anesth Analg 2022; 135:511-523. [PMID: 35977361 DOI: 10.1213/ane.0000000000006138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Patient blood management (PBM) offers significantly improved outcomes for almost all medical and surgical patient populations, pregnant women, and individuals with micronutrient deficiencies, anemia, or bleeding. It holds enormous financial benefits for hospitals and payers, improves performance of health care providers, and supports public authorities to improve population health. Despite this extraordinary combination of benefits, PBM has hardly been noticed in the world of health care. In response, the World Health Organization (WHO) called for its 194 member states, in its recent Policy Brief, to act quickly and decidedly to adopt national PBM policies. To further support the WHO's call to action, this article addresses 3 aspects in more detail. The first is the urgency from a health economic perspective. For many years, growth in health care spending has outpaced overall economic growth, particularly in aging societies. Due to competing economic needs, the continuation of disproportionate growth in health care spending is unsustainable. Therefore, the imperative for health care leaders and policy makers is not only to curb the current spending rate relative to the gross domestic product (GDP) but also to simultaneously improve productivity, quality, safety of patient care, and the health status of populations. Second, while PBM meets these requirements on an exceptional scale, uptake remains slow. Thus, it is vital to identify and understand the impediments to broad implementation. This includes systemic challenges such as the so-called "waste domains" of failure of care delivery caused by malfunctions of health care systems, failure of care coordination, overtreatment, and low-value care. Other impediments more specific to PBM are the misperception of PBM and deeply rooted cultural patterns. Third, understanding how the 3Es-evidence, economics, and ethics-can effectively be used to motivate relevant stakeholders to take on their respective roles and responsibilities and follow the urgent call to implement PBM as a standard of care.
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Affiliation(s)
- Axel Hofmann
- From the Faculty of Health and Medical Sciences, Discipline of Surgery, The University of Western Australia, Perth, Western Australia, Australia.,Institute of Anesthesiology, University of Zurich and University Hospital Zurich, Zurich, Switzerland
| | - Aryeh Shander
- Department of Anesthesiology, Critical Care and Hyperbaric Medicine, Englewood Health, Englewood, New Jersey.,College of Medicine, University of Florida, Gainesville, Florida.,School of Medicine at Mount Sinai, New York, New York.,Rutgers University, Newark, New Jersey
| | - Neil Blumberg
- Department of Pathology and Laboratory Medicine, School of Medicine and Dentistry, University of Rochester Medical Center, Rochester, New York
| | - Jeffrey M Hamdorf
- From the Faculty of Health and Medical Sciences, Discipline of Surgery, The University of Western Australia, Perth, Western Australia, Australia
| | - James P Isbister
- School of Medicine, The University of Sydney, Sydney, New South Wales, Australia
| | - Irwin Gross
- Department of Medicine, Eastern Maine Medical Center, Bangor, Maine
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Saporito A, La Regina D, Hofmann A, Ruinelli L, Merler A, Mongelli F, Trentino KM, Ferrari P. Perioperative inappropriate red blood cell transfusions significantly increase total costs in elective surgical patients, representing an important economic burden for hospitals. Front Med (Lausanne) 2022; 9:956128. [PMID: 36111110 PMCID: PMC9468475 DOI: 10.3389/fmed.2022.956128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Accepted: 08/12/2022] [Indexed: 01/28/2023] Open
Abstract
Background Red blood cell (RBC) transfusions in surgical patients are associated with increased morbidity a hospital stay. However, little is known about how clinical and economic outcomes differ between appropriately and inappropriately transfused patients. We hypothesized that inappropriate RBC transfusions in elective surgical patients would significantly increase hospital cost. The aim of this study was to quantify the economic burden associated with inappropriate RBC transfusions. Methods We retrospectively included all adult patients admitted for elective non-cardiac surgery between January 2014 and March 2020. Patients were divided into three groups (not transfused, appropriately transfused and inappropriately transfused). The primary outcome was the excess in hospital cost in patients inappropriately transfused compared to non-transfused patients. Costs were calculated using a bottom–up approach and involving cost calculation on a granular level. According to international guidelines, transfusions were considered appropriate if administered with an ASA score of 1–2 and the last hemoglobin level measured before transfusion < 70 g/L, or with an ASA score ≥ 3 and the last hemoglobin level < 80 g/L. Cases where RBC transfusions were deemed necessary regardless of the Hb levels were reviewed by the patient blood management (PBM) board and classified accordingly. Secondary outcomes included total transfusion rate, transfusion index, and length of hospital stay. Statistical analysis was carried out by multivariable regression models. Results During the study period there were 54,922 consecutive surgical admissions, of these 1,997 received an RBC transfusion, with 1,125 considered inappropriate. The adjusted cost of each inappropriate RBC transfusions was estimated in United States dollars (USD) 9,779 (95% CI, 9,358 – 10,199; p < 0.001) and totaled USD 11,001,410 in our series. Inappropriately transfused patients stayed 1.6 times (95% CI, 1.5–1.6; p < 0.001) longer in hospital (10.6 days vs. 6.7 days) than non-transfused patients and a mean 2.35 RBC units per patient were administered. Conclusion Inappropriate RBC transfusions in elective surgical patients seem to be common and may represent a significant economic burden. In our experience, inappropriate transfusions significantly increased hospital costs by an average of USD 9,779 compared to non-transfused patients. Through specific PBM policy, hospitals may improve cost-effectiveness of their elective surgical activity by lowering inappropriate transfusions.
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Affiliation(s)
- Andrea Saporito
- Faculty of Biomedical Sciences, University of Italian Switzerland, Lugano, Switzerland
- Division of Anesthesiology, Bellinzona e Valli Regional Hospital, Ente Ospedaliero Cantonale, Bellinzona, Switzerland
| | - Davide La Regina
- Faculty of Biomedical Sciences, University of Italian Switzerland, Lugano, Switzerland
- Department of Surgery, Bellinzona e Valli Regional Hospital, Ente Ospedaliero Cantonale, Bellinzona, Switzerland
| | - Axel Hofmann
- Institute of Anesthesiology, University Hospital of Zurich, Zurich, Switzerland
- Medical School, University of Western Australia, Perth, WA, Australia
| | - Lorenzo Ruinelli
- Information and Communications Technology Unit, Bellinzona e Valli Regional Hospital, Ente Ospedaliero Cantonale, Bellinzona, Switzerland
| | - Alessandro Merler
- Information and Communications Technology Unit, Bellinzona e Valli Regional Hospital, Ente Ospedaliero Cantonale, Bellinzona, Switzerland
| | - Francesco Mongelli
- Faculty of Biomedical Sciences, University of Italian Switzerland, Lugano, Switzerland
- Department of Surgery, Bellinzona e Valli Regional Hospital, Ente Ospedaliero Cantonale, Bellinzona, Switzerland
- *Correspondence: Francesco Mongelli,
| | - Kevin M. Trentino
- Medical School, University of Western Australia, Perth, WA, Australia
| | - Paolo Ferrari
- Faculty of Biomedical Sciences, University of Italian Switzerland, Lugano, Switzerland
- Division of Nephrology, Lugano Regional Hospital, Ente Ospedaliero Cantonale, Lugano, Switzerland
- Clinical School, University of New South Wales, Sydney, NSW, Australia
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9
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Guralnik J, Ershler W, Artz A, Lazo‐Langner A, Walston J, Pahor M, Ferrucci L, Evans WJ. Unexplained anemia of aging: Etiology, health consequences, and diagnostic criteria. J Am Geriatr Soc 2022; 70:891-899. [PMID: 34796957 PMCID: PMC9298858 DOI: 10.1111/jgs.17565] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 10/07/2021] [Accepted: 10/17/2021] [Indexed: 02/02/2023]
Abstract
BACKGROUND Up to 15% of people aged 60 and over are anemic, and the prevalence of anemia increases with age. In older men and women, anemia is associated with increases in the risk of death and all-cause hospitalization, poor functional capacity, quality of life, and depression. METHODS AND RESULTS We reviewed the literature describing anemia in aging populations, focusing on the specific diagnostic criteria of anemia and potential causes in older men and women. Even after extensive etiologic workup that involves careful medical history, physical examination, laboratory measurements, and additional studies such as bone marrow biopsy, anemia of aging is unexplained in up to 40% of older patients with anemia. As a result, treatment options remain limited. CONCLUSIONS The prevalence of unexplained anemia of aging (UAA; also called unexplained anemia of the elderly, UAE), its deleterious impacts on health, physical function, and quality of life, and the lack of effective treatment or therapy guidelines represent a compelling unmet clinical need. In this review and consensus document, we discuss the scope of the problem, possible causes of UAA, diagnostic criteria, and potential treatment options. Because even mild anemia is strongly linked to poor clinical outcomes, it should receive clinical attention rather than simply being considered a normal part of aging.
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Affiliation(s)
- Jack Guralnik
- University of Maryland School of MedicineBaltimoreMarylandUSA
| | | | - Andrew Artz
- City of Hope Medical CenterDuarteCaliforniaUSA
| | | | - Jeremy Walston
- Division of Geriatric MedicineJohns Hopkins School of MedicineBaltimoreMarylandUSA
| | - Marco Pahor
- Department of Aging & Geriatric MedicineUniversity of Florida College of MedicineGainesvilleFloridaUSA
| | | | - William J. Evans
- Department of Nutritional Sciences and ToxicologyUniversity of CaliforniaBerkeleyCaliforniaUSA,Division of GeriatricsDuke Medical CenterDurhamNorth CarolinaUSA
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10
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Shander A, Hardy JF, Ozawa S, Farmer SL, Hofmann A, Frank SM, Kor DJ, Faraoni D, Freedman J. A Global Definition of Patient Blood Management. Anesth Analg 2022; 135:476-488. [PMID: 35147598 DOI: 10.1213/ane.0000000000005873] [Citation(s) in RCA: 71] [Impact Index Per Article: 35.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
While patient blood management (PBM) initiatives are increasingly adopted across the globe as part of standard of care, there is need for a clear and widely accepted definition of PBM. To address this, an expert group representing PBM organizations, from the International Foundation for Patient Blood Management (IFPBM), the Network for the Advancement of Patient Blood Management, Haemostasis and Thrombosis (NATA), the Society for the Advancement of Patient Blood Management (SABM), the Western Australia Patient Blood Management (WAPBM) Group, and OnTrac (Ontario Nurse Transfusion Coordinators) convened and developed this definition: "Patient blood management is a patient-centered, systematic, evidence-based approach to improve patient outcomes by managing and preserving a patient's own blood, while promoting patient safety and empowerment." The definition emphasizes the critical role of informed choice. PBM involves the timely, multidisciplinary application of evidence-based medical and surgical concepts aimed at screening for, diagnosing and appropriately treating anemia, minimizing surgical, procedural, and iatrogenic blood losses, managing coagulopathic bleeding throughout the care and supporting the patient while appropriate treatment is initiated. We believe that having a common definition for PBM will assist all those involved including PBM organizations, hospital administrators, individual clinicians and policy makers to focus on the appropriate issues when discussing and implementing PBM. The proposed definition is expected to continue to evolve, making this endeavor a work in progress.
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Affiliation(s)
- Aryeh Shander
- From the Department of Anesthesiology, Critical Care and Hyperbaric Medicine, Englewood Health, Englewood, New Jersey.,Society for the Advancement of Patient Blood Management (SABM), Mount Royal, New Jersey
| | - Jean-Francois Hardy
- Department of Anaesthesiology and Pain Medicine, Université de Montréal, Montréal, Quebec, Canada.,Network for the Advancement of Patient Blood Management, Haemostasis and Thrombosis (NATA), Paris, France
| | - Sherri Ozawa
- Society for the Advancement of Patient Blood Management (SABM), Mount Royal, New Jersey.,Institute for Patient Blood Management and Bloodless Medicine and Surgery, Englewood Health, Englewood, New Jersey
| | - Shannon L Farmer
- Medical School and Division of Surgery, Faculty of Medicine and Health Sciences, The University of Western Australia, Perth, Western Australia, Australia.,Department of Haematology, Royal Perth Hospital, Perth, Western Australia, Australia.,International Foundation for Patient Blood Management, Basel, Switzerland.,The Western Australia Patient Blood Management Group, The University of Western Australia, Perth, Western Australia, Australia
| | - Axel Hofmann
- Medical School and Division of Surgery, Faculty of Medicine and Health Sciences, The University of Western Australia, Perth, Western Australia, Australia.,International Foundation for Patient Blood Management, Basel, Switzerland.,Department of Anesthesiology, University Hospital Zurich, Zurich, Switzerland
| | - Steven M Frank
- Department of Anesthesiology, Critical Care Medicine, Johns Hopkins Health System Patient Blood Management Program, The Armstrong Institute for Patient Safety and Quality, Johns Hopkins Medicine, Baltimore, Maryland
| | - Daryl J Kor
- Division of Critical Care Medicine, Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Michigan.,Patient Blood Management Program, Mayo Clinic, Rochester, Michigan
| | - David Faraoni
- Network for the Advancement of Patient Blood Management, Haemostasis and Thrombosis (NATA), Paris, France.,Department of Anesthesiology, Hospital for Sick Children, Toronto, Ontario, Canada
| | - John Freedman
- Ontario Nurse Transfusion Coordinators Program (ONTraC), Ontario, Canada.,The Department of Medicine, University of Toronto, Toronto, Ontario, Canada
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11
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Organizational Strategies for the Management of Intravenous Iron Therapy in Non-Hospitalized Settings: A Safe Opportunity to Implement Patient Blood Management in Italy. Healthcare (Basel) 2021; 9:healthcare9091222. [PMID: 34574994 PMCID: PMC8467602 DOI: 10.3390/healthcare9091222] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 09/11/2021] [Accepted: 09/15/2021] [Indexed: 01/25/2023] Open
Abstract
This article analyzes the recommendations issued by the Emilia Romagna region in July 2020 on “Organizational strategies for the safe management of intravenous iron therapy in patients in non-hospitalized settings”. The objective of these recommendations is to set up safe intravenous iron administration sites outside the hospital environment across the national territory. The document facilitates the organization of methods for intravenous iron infusion that are safe for the patient and correct from a medico-legal perspective. In addition, it opens the way for the widespread use of iron infusion in the field, providing benefits to patient quality of life. This program prevents unnecessary transfusions, reduces costs, prevents overcrowding in hospitals in the event of a pandemic, and enables patient treatment in the field, thus, saving on the use of personnel.
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12
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Hofmann A, Spahn DR, Holtorf AP. Making patient blood management the new norm(al) as experienced by implementors in diverse countries. BMC Health Serv Res 2021; 21:634. [PMID: 34215251 PMCID: PMC8249439 DOI: 10.1186/s12913-021-06484-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 05/06/2021] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Patient blood management (PBM) describes a set of evidence-based practices to optimize medical and surgical patient outcomes by clinically managing and preserving a patient's own blood. This concepts aims to detect and treat anemia, minimize the risk for blood loss and the need for blood replacement for each patient through a coordinated multidisciplinary care process. In combination with blood loss, anemia is the main driver for transfusion and all three are independent risk factors for adverse outcomes including morbidity and mortality. Evidence demonstrates that PBM significantly improves outcomes and safety while reducing cost by macroeconomic magnitudes. Despite its huge potential to improve healthcare systems, PBM is not yet adopted broadly. The aim of this study is to analyze the collective experiences of a diverse group of PBM implementors across countries reflecting different healthcare contexts and to use these experiences to develop a guidance for initiating and orchestrating PBM implementation for stakeholders from diverse professional backgrounds. METHODS Semi-structured interviews were conducted with 1-4 PBM implementors from 12 countries in Asia, Latin America, Australia, Central and Eastern Europe, the Middle East, and Africa. Responses reflecting the drivers, barriers, measures, and stakeholders regarding the implementation of PBM were summarized per country and underwent qualitative content analysis. Clustering the resulting implementation measures by levels of intervention for PBM implementation informed a PBM implementation framework. RESULTS A set of PBM implementation measures were extracted from the interviews with the implementors. Most of these measures relate to one of six levels of implementation including government, healthcare providers, funding, research, training/education, and patients/public. Essential cross-level measures are multi-stakeholder communication and collaboration. CONCLUSION The implementation matrix resulting from this research helps to decompose the complexity of PBM implementation into concrete measures on each implementation level. It provides guidance for diverse stakeholders to design, initiate and develop strategies and plans to make PBM a national standard of care, thus closing current practice gaps and matching this unmet public health need.
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Affiliation(s)
- Axel Hofmann
- Institute of Anesthesiology, University and University Hospital of Zurich, Zurich, Switzerland
- University of Western Australia Faculty of Health and Medical Sciences, Perth, Australia
| | - Donat R. Spahn
- Institute of Anesthesiology, University and University Hospital of Zurich, Zurich, Switzerland
| | - Anke-Peggy Holtorf
- Health Outcomes Strategies GmbH, Colmarerstrasse 58, CH4055 Basel, Switzerland
- Faculty of the College of Pharmacy, University of Utah, Salt Lake City, UT USA
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13
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Peretto G, Sala S, Camaschella C. Iron deficiency in chronic myocarditis: Assessment and prognostic significance. Eur J Intern Med 2021; 89:129-131. [PMID: 33893018 DOI: 10.1016/j.ejim.2021.03.037] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 03/24/2021] [Accepted: 03/28/2021] [Indexed: 12/26/2022]
Affiliation(s)
- Giovanni Peretto
- Myocarditis Unit,Department of Cardiac Electrophysiology and Arrhythmology,IRCCS San Raffaele Scientific Institute, Milan, Italy; Medicine School,San Raffaele Vita-Salute University, Milan, Italy.
| | - Simone Sala
- Myocarditis Unit,Department of Cardiac Electrophysiology and Arrhythmology,IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Clara Camaschella
- Medicine School,San Raffaele Vita-Salute University, Milan, Italy; Department of Hematology, IRCCS San Raffaele Scientific Institute, Milan, Italy
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14
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Cohn CS, Pagano MB, Allen ES, Frey KP, Gniadek T, Lokhandwala PM, Murphy CH, Raval JS, Dunbar NM. How do I manage long-term blood component shortages in a hospital transfusion service? Transfusion 2020; 60:1897-1904. [PMID: 32643156 DOI: 10.1111/trf.15857] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 04/27/2020] [Accepted: 04/28/2020] [Indexed: 01/09/2023]
Affiliation(s)
- Claudia S Cohn
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, Minnesota, USA
| | - Monica B Pagano
- Department of Laboratory Medicine, University of Washington, Seattle, Washington, USA
| | - Elizabeth S Allen
- Department of Pathology, University of California San Diego, La Jolla, California, USA
| | - Kathrine P Frey
- Department of Pathology, Fairview Southdale Hospital, Minneapolis, Minnesota, USA
| | - Thomas Gniadek
- Department of Pathology and Laboratory Medicine, North Shore University Health System, Evanston, Illinois, USA
| | - Parvez M Lokhandwala
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Colin H Murphy
- Department of Pathology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Jay S Raval
- Department of Pathology, University of New Mexico, Albuquerque, New Mexico, USA
| | - Nancy M Dunbar
- Department of Pathology and Laboratory Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA
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15
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Santos CAD, Rosa CDOB, Franceschini SDCC, Firmino HH, Ribeiro AQ. Usefulness of the StrongKids Screening Tool in Detecting Anemia and Inflammation in Hospitalized Pediatric Patients. J Am Coll Nutr 2020; 40:155-163. [PMID: 32281910 DOI: 10.1080/07315724.2020.1750072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Objective: To assess whether the nutritional risk classified by StrongKids is associated with anemia and inflammation (total leukocytes and C-reactive protein (CRP)), as well as to compare the ability of StrongKids with anthropometry in identifying these changes in hospitalized pediatric patients.Methods: Cross-sectional study with patients admitted to the pediatric ward of a public hospital in Brazil, from 2014 to 2018. The experimental protocol included: nutritional risk screening by StrongKids; weight and height measurements; and biochemical tests (complete blood count and C-reactive protein - CRP). Sensitivity, specificity, positive predictive value and negative predictive value were calculated to assess the ability of StrongKids and anthropometry to identify patients with the biochemical changes.Results: The study included 482 patients (54.2% male), with a median age of 2.7 years. The frequency of nutritional risk (medium or high) was 85.9% and the prevalence of malnutrition (acute and/or chronic) was 20.2%. Overall, of the patients evaluated, 40.2% had anemia, 28.2% leukocytosis, and 78.0% high CRP. Children and adolescents classified as at nutritional risk (moderate/high) had lower levels of hemoglobin and higher levels of CRP and total leukocytes, as well as a higher frequency of leukocytosis, high CRP and the three alterations combined when compared with individuals at low risk. No association was found between anthropometric variables and biochemical alterations. The sensitivity of nutritional screening was high to detect all biochemical alterations and was superior to the anthropometric assessment.Conclusion: StrongKids was associated with alterations in biochemical parameters with a better performance than anthropometry.
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Affiliation(s)
| | | | | | - Heloísa Helena Firmino
- Nutrition Support Team, Department of Dietetics, São Sebastião Hospital, Viçosa, Minas Gerais, Brazil
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16
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Murphy MF, Palmer A. Patient blood management as the standard of care. HEMATOLOGY. AMERICAN SOCIETY OF HEMATOLOGY. EDUCATION PROGRAM 2019; 2019:583-589. [PMID: 31808828 PMCID: PMC6913475 DOI: 10.1182/hematology.2019000063] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Blood transfusion is one of the most common hospital procedures in developed countries. However, inappropriate use of blood transfusion is common, and this is of considerable concern because transfusion is known to be associated with adverse events and is costly. Reductions in blood use have resulted from recent evidence indicating that restrictive use of red blood cell transfusions is associated with similar patient outcomes to liberal strategies and from a focus on patient blood management (PBM), which recognizes the importance of conserving the patient's own blood alongside the judicious use of transfusion. A recent Consensus Conference in Frankfurt developed practice and research recommendations for PBM but also indicated that additional studies are needed to provide better evidence for PBM interventions, including for improved patient outcomes and lower hospital costs as well as for reductions in blood utilization. In the meanwhile, it is of utmost importance to translate PBM guidelines into practical day-to-day recommendations and encourage their use to make PBM "the standard of care."
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Affiliation(s)
- Michael F Murphy
- National Health Service Blood & Transplant, Oxford, United Kingdom
- National Institute for Health Research Biomedical Research Centre, Oxford University Hospitals and University of Oxford, Oxford, United Kingdom; and
| | - Antony Palmer
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, Oxford, United Kingdom
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17
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LaVallee C, Cronin P, Bansal I, Kwong WJ, Boccia R. Importance of Initial Complete Parenteral Iron Repletion on Hemoglobin Level Normalization and Health Care Resource Utilization: A Retrospective Analysis. Pharmacotherapy 2019; 39:983-993. [PMID: 31411763 DOI: 10.1002/phar.2319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
STUDY OBJECTIVE Iron deficiency anemia is the most common form of anemia, and parenteral iron therapy is necessary in select patients. The objective of this analysis was to assess the impact of initial complete parenteral iron repletion on serum hemoglobin (Hgb) level normalization and on health care resource utilization in real-world practice. DESIGN Retrospective observational study. DATA SOURCE Decision Resources Group Real-World Data Repository (United States databases). PATIENTS A total of 2966 patients who had a baseline Hgb level below normal (< 12 g/dl for females and < 13.5 g/dl for males) and were treated with parenteral iron between March 2015 and February 2017. MEASUREMENTS AND MAIN RESULTS The effect of receiving the required parenteral iron dose to replete the deficit, calculated by a modified Ganzoni formula, within 3 weeks of the first parenteral iron therapy claim (index date) on the likelihood of Hgb level normalization, was estimated by using logistic regression. All analyses were adjusted for sex, age, comorbidities, and use of prescription oral iron therapy. The adjusted mean numbers of all-cause inpatient admissions, outpatient visits, and emergency department (ED) visits within 6 months and 1 year after the index date were compared between patients with and without normalized Hgb levels by using negative binomial regression. Of the 2966 included patients, 33.9% received the required iron dose within 3 weeks of the index date, and 19.6%, 48.2%, and 53.9% had a normalized Hgb level within 8 weeks of the index date, within 1 year of the index date, and until the end of data availability, respectively. Patients who received the required iron dose within 3 weeks of the index date were significantly more likely to have a normalized Hgb level within 8 weeks of the index date and at any time during the study period than those who did not: adjusted odds ratio (OR) (95% confidence interval [CI]) 2.67 (2.20, 3.24) and 2.33 (1.96, 2.77), respectively. Hgb level normalization within 1 year of the index date was associated with fewer inpatient admissions and outpatient visits and a similar number of ED visits compared with no Hgb level normalization 1 year after the index date. CONCLUSION The results of these analyses underscore the importance of initial complete parenteral iron repletion for rapidly improving clinical outcomes. Prompt achievement of a normalized Hgb level may also provide an opportunity to reduce health care resource utilization in patients with iron deficiency anemia receiving parenteral iron therapy.
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Affiliation(s)
- Chris LaVallee
- Health Outcomes Research, Decision Resources Group, Boston, Massachusetts
| | - Patrick Cronin
- Analytics, Decision Resources Group, Boston, Massachusetts
| | - Isha Bansal
- Analytics, Decision Resources Group, Boston, Massachusetts
| | | | - Ralph Boccia
- Center for Cancer and Blood Disorders, Bethesda, Maryland
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18
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Trentino KM, Leahy MF, Sanfilippo FM, Farmer SL, Hofmann A, Mace H, Murray K. Associations of nadir haemoglobin level and red blood cell transfusion with mortality and length of stay in surgical specialties: a retrospective cohort study. Anaesthesia 2019; 74:726-734. [DOI: 10.1111/anae.14636] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/20/2019] [Indexed: 01/07/2023]
Affiliation(s)
- K. M. Trentino
- Medical School The University of Western Australia Perth WAAustralia
| | - M. F. Leahy
- Department of Haematology Royal Perth Hospital Perth WAAustralia
| | - F. M. Sanfilippo
- School of Population and Global Health The University of Western Australia Perth WAAustralia
| | - S. L. Farmer
- Medical School The University of Western Australia Perth WAAustralia
| | - A. Hofmann
- Medical School The University of Western Australia Perth WAAustralia
| | - H. Mace
- Fiona Stanley Hospital Perth WAAustralia
| | - K. Murray
- School of Population and Global Health The University of Western Australia Perth WAAustralia
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