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Gong M, Zhang Y, Chen N, Ma LL, Feng XM, Yan YX. Proteomics in Cardiovascular disease. Clin Chim Acta 2024; 557:117877. [PMID: 38537675 DOI: 10.1016/j.cca.2024.117877] [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: 02/20/2024] [Revised: 03/14/2024] [Accepted: 03/14/2024] [Indexed: 04/13/2024]
Abstract
This study focuses on recent advances in proteomics and provides an up-to-date use of this technology in identifying cardiovascular disease (CVD) biomarkers. A total of eight electronic databases (PubMed, EMBASE, Web of Science, Cochrane Library, Wanfang, Vip, Sinomed, and CNKI) were searched and five were used for integrative analysis of sensitivity, specificity, positive likelihood ratio (PLR), negative likelihood ratio (NLR), diagnostic ratio (DOR) and 1 secondary indicator area under the curve (AUC). This systematic review and integrative analysis summarized potential biomarkers previously identified by proteomics. The integrative analysis suggested that proteomics technology had high clinical value in CVD diagnosis. The findings provided new possible directions for the prevention or diagnosis of CVD.
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Affiliation(s)
- Miao Gong
- Department of Epidemiology and Biostatistics, School of Public Health, Capital Medical University, Beijing, China; Municipal Key Laboratory of Clinical Epidemiology, Beijing, China
| | - Yu Zhang
- Department of Epidemiology and Biostatistics, School of Public Health, Capital Medical University, Beijing, China; Municipal Key Laboratory of Clinical Epidemiology, Beijing, China
| | - Ning Chen
- Department of Epidemiology and Biostatistics, School of Public Health, Capital Medical University, Beijing, China; Municipal Key Laboratory of Clinical Epidemiology, Beijing, China
| | - Lin-Lin Ma
- Department of Epidemiology and Biostatistics, School of Public Health, Capital Medical University, Beijing, China; Municipal Key Laboratory of Clinical Epidemiology, Beijing, China
| | - Xu-Man Feng
- Department of Epidemiology and Biostatistics, School of Public Health, Capital Medical University, Beijing, China; Municipal Key Laboratory of Clinical Epidemiology, Beijing, China
| | - Yu-Xiang Yan
- Department of Epidemiology and Biostatistics, School of Public Health, Capital Medical University, Beijing, China; Municipal Key Laboratory of Clinical Epidemiology, Beijing, China.
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2
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Hsiao PM, Liao SC, Chen IJ, Chou YC, Hsu YH, Wang SM, Yu YH. Incidence of deep vein thrombosis and symptomatic pulmonary embolism in Taiwanese patients with pelvic and/or acetabular fractures: a retrospective study. Sci Rep 2023; 13:16352. [PMID: 37770539 PMCID: PMC10539495 DOI: 10.1038/s41598-023-43449-4] [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: 02/21/2023] [Accepted: 09/24/2023] [Indexed: 09/30/2023] Open
Abstract
Venous thromboembolism (VTE) is common in patients with trauma, and thromboprophylaxis has been advocated. However, conflicting results regarding VTE rates in the Asian population following orthopaedic procedures have been presented. We aimed to investigate the VTE incidence in Taiwanese patients with pelvic and/or acetabular fractures and identify the associated risk factors. We included 402 patients who underwent surgery for pelvic and/or acetabular fractures. All patients received mechanical thromboprophylaxis with graduated compression stockings. Duplex scanning was performed postoperatively or during follow-up when signs or symptoms of deep vein thrombosis (DVT) developed. Variables with a significance level of ≤ 0.1 in the univariate analyses were introduced into the multivariate logistic regression analysis to identify DVT risk factors. The overall DVT and symptomatic pulmonary embolism (PE) rate was 3.48% (14/402 patients). Among patients with DVT, 46.1% were asymptomatic. Patients with VTE were significantly older than those without. Multivariate logistic regression analysis revealed that age was a VTE risk factor. The incidence of DVT and symptomatic PE in our cohort was low. Advanced age was a risk factor for VTE. These findings could help clinicians develop appropriate prevention and treatment strategies for VTE in Taiwanese patients with pelvic and/or acetabular fractures.
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Affiliation(s)
- Po-Meng Hsiao
- Department of Orthopaedics, New Taipei Municipal TuCheng Hospital, No. 6, Sec. 2, Jincheng Rd., Tucheng Dist., New Taipei City, 236, Taiwan
- Chang Gung University, No. 259, Wenhua 1St Rd., Guishan Dist., Taoyuan City, 33302, Taiwan
- Department of Orthopedic Surgery, Musculoskeletal Research Center, Chang Gung Memorial Hospital, Linkou Branch, No. 5, Fu-Hsin St. Kweishan, 33302, Taoyuan, Taiwan
| | - Shu-Chen Liao
- Department of Orthopaedics, New Taipei Municipal TuCheng Hospital, No. 6, Sec. 2, Jincheng Rd., Tucheng Dist., New Taipei City, 236, Taiwan
- Chang Gung University, No. 259, Wenhua 1St Rd., Guishan Dist., Taoyuan City, 33302, Taiwan
- Department of Orthopedic Surgery, Musculoskeletal Research Center, Chang Gung Memorial Hospital, Linkou Branch, No. 5, Fu-Hsin St. Kweishan, 33302, Taoyuan, Taiwan
| | - I-Jung Chen
- Chang Gung University, No. 259, Wenhua 1St Rd., Guishan Dist., Taoyuan City, 33302, Taiwan
- Department of Orthopedic Surgery, Musculoskeletal Research Center, Chang Gung Memorial Hospital, Linkou Branch, No. 5, Fu-Hsin St. Kweishan, 33302, Taoyuan, Taiwan
| | - Ying-Chao Chou
- Chang Gung University, No. 259, Wenhua 1St Rd., Guishan Dist., Taoyuan City, 33302, Taiwan
- Department of Orthopedic Surgery, Musculoskeletal Research Center, Chang Gung Memorial Hospital, Linkou Branch, No. 5, Fu-Hsin St. Kweishan, 33302, Taoyuan, Taiwan
| | - Yung-Heng Hsu
- Chang Gung University, No. 259, Wenhua 1St Rd., Guishan Dist., Taoyuan City, 33302, Taiwan
- Department of Orthopedic Surgery, Musculoskeletal Research Center, Chang Gung Memorial Hospital, Linkou Branch, No. 5, Fu-Hsin St. Kweishan, 33302, Taoyuan, Taiwan
| | - Shu-Mei Wang
- Chang Gung University, No. 259, Wenhua 1St Rd., Guishan Dist., Taoyuan City, 33302, Taiwan
- Department of Pediatric Orthopedics, Chang Gung Memorial Hospital, No. 5, Fu-Hsin St. Kweishan, 33302, Taoyuan, Taiwan
| | - Yi-Hsun Yu
- Chang Gung University, No. 259, Wenhua 1St Rd., Guishan Dist., Taoyuan City, 33302, Taiwan.
- Department of Orthopedic Surgery, Musculoskeletal Research Center, Chang Gung Memorial Hospital, Linkou Branch, No. 5, Fu-Hsin St. Kweishan, 33302, Taoyuan, Taiwan.
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Wauthier L, Favresse J, Hardy M, Douxfils J, Le Gal G, Roy P, van Es N, Ay C, ten Cate H, Lecompte T, Lippi G, Mullier F. D-dimer testing: A narrative review. Adv Clin Chem 2023. [DOI: 10.1016/bs.acc.2023.02.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
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Hardy M, Michaux I, Bulpa P, Schonau B, Nicolay B, de Maistre E, Godon A, Lecompte T, Mullier F. Serial fibrin monomer and D-dimer plasma levels measurements can capture thrombotic complications in critically ill COVID-19 patients: A prospective observational study. Thromb Res 2023; 221:69-72. [PMID: 36476478 PMCID: PMC9712142 DOI: 10.1016/j.thromres.2022.11.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 11/22/2022] [Accepted: 11/28/2022] [Indexed: 12/03/2022]
Affiliation(s)
- M. Hardy
- Université catholique de Louvain, CHU UCL Namur, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for Life Science (NARILIS), Hematology Laboratory, Namur, Belgium,CHU UCL Namur, Anesthesiology Department, Namur, Belgium,Corresponding author at: Université catholique de Louvain, CHU UCL Namur, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for Life Science (NARILIS), Hematology Laboratory, Namur, Belgium
| | - I. Michaux
- Université catholique de Louvain, CHU UCL Namur, Intensive Care Medicine Department, Namur, Belgium
| | - P. Bulpa
- Université catholique de Louvain, CHU UCL Namur, Intensive Care Medicine Department, Namur, Belgium
| | - B. Schonau
- CHU UCL Namur, Vascular Medicine Department, Namur, Belgium
| | - B. Nicolay
- CHU UCL Namur, Anesthesiology Department, Namur, Belgium
| | - E. de Maistre
- Service d'Hématologie Biologique, Unité d'hémostase, CHU Dijon, Dijon, France
| | - A. Godon
- Department of Anesthesiology and Critical Care, Grenoble Alpes University Hospital, Grenoble, France
| | - T. Lecompte
- University of Namur, Pharmacy Department, Namur, Belgium,Université de Lorraine, Nancy, France
| | - F. Mullier
- Université catholique de Louvain, CHU UCL Namur, Namur Thrombosis and Hemostasis Center (NTHC), Namur Research Institute for Life Science (NARILIS), Hematology Laboratory, Namur, Belgium
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Thachil J, Favaloro EJ, Lippi G. D-dimers-"Normal" Levels versus Elevated Levels Due to a Range of Conditions, Including "D-dimeritis," Inflammation, Thromboembolism, Disseminated Intravascular Coagulation, and COVID-19. Semin Thromb Hemost 2022; 48:672-679. [PMID: 35803265 DOI: 10.1055/s-0042-1748193] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
D-dimers reflect a breakdown product of fibrin. The current narrative review outlines how D-dimers can arise in normal individuals, as well as in patients suffering from a wide range of disease states. D-dimers in normal individuals without evident thrombosis can arise from background fibrinolytic activity in various tissues, including kidney, mammary and salivary glands, which ensures smooth flow of arising fluids where any blood contamination could be immediately lysed. In addition, healthy individuals can also regularly sustain minor injuries, often unbeknown to them, and wound healing follows clot formation in these situations. D-dimers can also arise in anxiety and following exercise, and are also markers of inflammation. Lung inflammation (triggered by microbes or foreign particles) is perhaps also particularly relevant, since the hemostasis system and fibrinolysis help to trap and remove such debris. Lung inflammation in patients with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) may contribute to D-dimer levels additive to thrombosis in patients with COVID-19 (coronavirus disease 2019). Indeed, severe COVID-19 can lead to multiple activation events, including inflammation, primary and secondary hemostasis, and fibrinolysis, all of which may contribute to cumulative D-dimer development. Finally, D-dimer testing has also found a role in the diagnosis and triaging of the so-called (COVID-19) vaccine-induced thrombotic thrombocytopenia.
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Affiliation(s)
- Jecko Thachil
- Department of Haematology, Manchester University Hospitals, Manchester, United Kingdom
| | - Emmanuel J Favaloro
- Department of Haematology, Institute of Clinical Pathology and Medical Research (ICPMR), NSW Health Pathology, Westmead Hospital, Westmead, New South Wales, Australia.,Sydney Centres for Thrombosis and Haemostasis, Westmead, New South Wales, Australia.,Faculty of Science and Health, Charles Sturt University, Wagga Wagga, New South Wales, Australia
| | - Giuseppe Lippi
- Section of Clinical Biochemistry, University Hospital of Verona, Verona, Italy
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Brotman DJ. Higher D-Dimer Thresholds for Excluding Pulmonary Embolism: No Free Lunch? Ann Intern Med 2022; 175:295-296. [PMID: 34904904 DOI: 10.7326/m21-4295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Daniel J Brotman
- Division of Hospital Medicine, Department of Medicine, Johns Hopkins University, Baltimore, Maryland
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7
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Avila L, Amiri N, Pullenayegum E, Sealey VA, De R, Williams S, Vincelli J, Brandão LR. Diagnostic value of D-dimers for limb deep vein thrombosis in children: A prospective study. Am J Hematol 2021; 96:954-960. [PMID: 33930198 DOI: 10.1002/ajh.26212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 04/24/2021] [Accepted: 04/28/2021] [Indexed: 01/01/2023]
Abstract
The present study sought to evaluate the discriminative and predictive ability of D-dimer for pediatric limb DVT. Children aged 28 days-18 years requiring imaging to rule out limb DVT, as per the treating clinical team, were enrolled in the study. The outcome was ultrasound proven DVT. The D-dimer levels were obtained around the time of imaging. Receiver operating characteristic (ROC) curves and logistic regression models were used for data analyses. In total, 296 patients were enrolled between 2017-2020; 204 patients were diagnosed with DVT (DVT[+]). Median D-dimer levels were 2.3 μg/ml FEU (25th-75th percentile 0.9-3.9) among DVT(+) and 1.9 μg/ml FEU (25th-75th percentile 0.8-4.0) among DVT(-) patients (p = 0.60). The area under the ROC curve (AUC) was 0.52 (95% confidence interval [CI] 0.45-0.59). The odds ratio for D-dimer levels was 1.00 (95% CI 0.99-1.01), holding confounders constant. In a sub-group exploratory analysis including 23 patients with no underlying conditions or co-morbidities, the AUC curve was 0.90 (95% CI 0.76-1.00). In conclusion, in this prospective cohort study of consecutive children with suspected limb DVT, D-dimer levels had poor discriminative and predictive ability for DVT. However, D-dimer levels showed better discriminative and predictive ability for DVT in an exploratory sample of patients with no underlying conditions or co-morbidities at the time of diagnosis.
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Affiliation(s)
- Laura Avila
- The Hospital for Sick Children Toronto Ontario Canada
| | - Nour Amiri
- The Hospital for Sick Children Toronto Ontario Canada
| | | | | | - Riddhita De
- The Hospital for Sick Children Toronto Ontario Canada
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Safety of a strategy combining D-dimer testing and whole-leg ultrasonography to rule out deep vein thrombosis. Blood Adv 2020; 4:5002-5010. [PMID: 33057634 DOI: 10.1182/bloodadvances.2020002173] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 07/23/2020] [Indexed: 11/20/2022] Open
Abstract
Guidelines for the diagnostic workup of deep vein thrombosis (DVT) recommend assessing the clinical pretest probability before proceeding to D-dimer testing and/or compression ultrasonography (CUS) if the patient has high pretest probability or positive D-dimer. Referring only patients with positive D-dimer for whole-leg CUS irrespective of pretest probability may simplify the workup of DVT. In this prospective management outcome study, we assessed the safety of such a strategy. We included consecutive outpatients referred to the Emergency Department at Østfold Hospital, Norway, with suspected DVT between February 2015 and November 2018. STA-Liatest D-Di Plus D-dimer was analyzed for all patients, and only patients with levels ≥0.5 µg/mL were referred for CUS. All patients with negative D-dimer or negative CUS were followed for 3 months to assess the venous thromboembolic rate. One thousand three hundred ninety-seven patients were included. Median age was 64 years (interquartile range, 52-73 years), and 770 patients (55%) were female. D-dimer was negative in 415 patients (29.7%) and positive in 982 patients (70.3%). DVT was diagnosed in 277 patients (19.8%). Six patients in whom DVT was ruled out at baseline were diagnosed with DVT within 3 months of follow-up for a thromboembolic rate of 0.5% (95% confidence interval, 0.2-1.2). A simple diagnostic approach with initial stand-alone D-dimer followed by a single whole-leg CUS in patients with positive D-dimer safely ruled out DVT. We consider this strategy to be a valuable alternative to the conventional workup of DVT in outpatients. This trial was registered at www.clinicaltrials.gov as #NCT02486445.
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Zhao X, Ali SJ, Sang X. Clinical Study on the Screening of Lower Extremity Deep Venous Thrombosis by D-Dimer Combined with RAPT Score Among Orthopedic Trauma Patients. Indian J Orthop 2020; 54:316-321. [PMID: 33194107 PMCID: PMC7641287 DOI: 10.1007/s43465-020-00268-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Accepted: 09/18/2020] [Indexed: 02/04/2023]
Abstract
BACKGROUND Among the causes of mortality in patients with lower extremity fracture following surgery, lower extremity deep venous thrombosis (DVT) is a leading one. To lower the morbidity and mortality, early screening and preventive anticoagulation therapy are essential in clinical study. Common screening methods, including risk prediction tools, imaging tests and D-dimer test, had various drawbacks. The study aimed to establish a new method, that is, D-dimer combined with Risk Assessment and Predictor Tool (RAPT) score, for screening the lower extremity DVT among patients with lower extremity fracture and evaluate its clinical value. MATERIALS AND METHODS The RAPT score, plasma D-dimer and lower extremity venous ultrasonography examination reports were collected from Department of Emergency Surgery & Orthopaedic Surgery from July 2019 to December 2019, and the data were analyzed retrospectively. Regarding the lower extremity venous ultrasonography examination report as the "gold standard" to determine whether DVT exists, the sensitivity, specificity and area under the curve (AUC) of RAPT score alone, plasma D-dimer alone and combination of them in screening lower extremity DVT were analyzed and evaluated. RESULTS 197 patients were enrolled in the study. There were significant differences in D-dimer level and RAPT score between DVT group and non-DVT group (P < 0.01). The sensitivity, specificity and AUC of RAPT score and D-dimer in screening lower extremity DVT were 78.12%, 56.44%, 0.723 and 97.71%, 25.74%, 0.803, respectively. The optimal diagnostic value of D-dimer decided by Youden's index was 1.125 μg/ml. The sensitivity and specificity of the method by combining RAPT score with this new D-dimer threshold were 96.88% and 42.57%, respectively, and AUC was 0.812. CONCLUSION Higher diagnostic accuracy could be achieved by combining RAPT score with new D-dimer threshold. This novel diagnostic method is potential in the clinical diagnosis of DVT among orthopedic trauma patients.
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Affiliation(s)
- Xin Zhao
- Department of Emergency Surgery and Orthopaedic Surgery, Qilu Hospital, Shandong University, Jinan, 250012 China
| | - Salma Juma Ali
- School of Medicine, Shandong University, Jinan, 250002 Shandong China
| | - Xiguang Sang
- Department of Emergency Surgery and Orthopaedic Surgery, Qilu Hospital, Shandong University, Jinan, 250012 China
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Elmi G, Rinaldi ER, Domanico A, Aluigi L. Calf deep vein thrombosis – clinical relevance, diagnostic approaches and therapeutic options. VASA 2020; 49:359-366. [DOI: 10.1024/0301-1526/a000869] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Summary. Isolated distal deep vein thromboses (IDDVT) represent up to 50 % of legs deep vein thromboses (DVT). However, since their natural history is to date unknown, the need to diagnose and treat them is a matter of debate. The diagnostic strategy based on the assessment of pre-test probability and D-dimer demonstrated a scarse efficiency for IDDVT. The choice between a proximal and a complete ultrasonographic approach should be guided by the clinical context, the local expertise and the patient characteristics. Randomized and observational studies have analyzed the need of therapy and compared different regimens of anticoagulation, with conflicting results. Systematic reviews and meta-analyses tend to support the usefulness of an anticoagulant treatment, even if the optimal dose and duration are not still defined. A careful stratification of the patient’s profile, taking into account risk factors for proximal extension, recurrence and bleeding should address the therapeutic approach, which must always be discussed with an adequately informed patient. Further studies aimed to clarify the natural history of IDDVT, and to assess safety and efficacy of lower intensity and shorter duration protocols are urgently needed.
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Affiliation(s)
- Giovanna Elmi
- Medical Department, Ultrasound Program, Maggiore Hospital, Azienda USL of Bologna, Italy
| | - Elisa Rebecca Rinaldi
- Medical Department, Ultrasound Program, Maggiore Hospital, Azienda USL of Bologna, Italy
| | - Andrea Domanico
- Medical Department, Ultrasound Program, Maggiore Hospital, Azienda USL of Bologna, Italy
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Prentice D, Deroche CB, Wipke-Tevis DD. Excluding Pulmonary Embolism with End-tidal Carbon Dioxide: Accuracy, Cost, and Harm Avoidance. West J Nurs Res 2020; 42:1022-1030. [PMID: 32406785 DOI: 10.1177/0193945920914492] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A non-randomized single center prospective, descriptive, correlational design was used to determine what end-tidal carbon dioxide (EtCO2) level provided the best sensitivity, specificity, and negative predictive value to exclude pulmonary embolism (PE) diagnosis in hemodynamically stable hospitalized adults (n = 111). The financial impact and harm avoidance of adding EtCO2 to the PE diagnostic process also were examined. PE diagnosis was determined by computed tomography pulmonary angiography (CTPA). PE prevalence was 18.9%. Mean±SD EtCO2 was lower for PE positive than negative participants (28 ± 7.8 to 33 ± 8.1 mmHg respectively 95% CI: 1.22-8.96; P = .01). For PE exclusion, an EtCO2 cutoff ≥42 mmHg yielded 100% sensitivity, 12.2% specificity, and 100% negative predictive value. For every six inpatients assessed with EtCO2, one could be saved from unnecessary CTPA. Eliminating unnecessary CTPA removes the potential harm associated with radiation and intravenous contrast exposure. Additionally, an EtCO2 cutoff ≥42 mmHg could eliminate ~$88,000/year in healthcare waste at this institution.
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Affiliation(s)
| | - Chelsea B Deroche
- Biostatistics & Research Design Unit, MU School of Medicine, University of Missouri, Columbia
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Affiliation(s)
- Hyangkyoung Kim
- Division of Vascular Surgery, Department of Surgery, College of Medicine, University of Ulsan, Asan Medical Center, Seoul, Korea
| | - Sang Seob Yun
- Division of Vascular and Transplant Surgery, Department of Surgery, College of Medicine, The Catholic University of Korea, Seoul St. Mary’s Hospital, Seoul, Korea
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D-dimer as a stand-alone test to rule out deep vein thrombosis. Thromb Res 2020; 191:134-139. [PMID: 32447095 DOI: 10.1016/j.thromres.2020.04.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 04/14/2020] [Accepted: 04/20/2020] [Indexed: 11/20/2022]
Abstract
BACKGROUND Current guidelines recommend the use of clinical decision rules, such as Wells score, in combination with D-dimer to assess the need for objective imaging to rule out deep vein thrombosis (DVT). However, the clinical decision rule has limitations, and use of D-dimer as a stand-alone test has been suggested. OBJECTIVE We aimed to assess the safety and efficiency of D-dimer as a stand-alone test to rule out DVT in outpatients referred with suspected DVT. METHODS We collected data from consecutive outpatients referred to our hospital with suspected DVT in 2008-2018. D-dimer levels were analyzed using STA® Liatest® D-Di assay. D-dimer as a stand-alone test was theoretically applied in retrospect, and the number of misdiagnosed events were estimated as if such an approach had been initially used. All patients were followed for three months. RESULTS Of 1765 included patients, 293 (16.6%) were diagnosed with DVT. A total of 491 patients (27.8%) had a negative D-dimer (<500 ng/mL). Of these, nine were diagnosed with DVT, yielding a failure rate for D-dimer as a stand-alone test of 1.8% (95% CI 0.8%-3.5%). The majority of the misdiagnosed patients had distal DVT. In analyses restricted to proximal DVTs, the failure rate was 0.6% (95% CI 0.1%-1.8%). D-dimer as a stand-alone approach reduced the proportion of required ultrasounds from 81.8% to 72.2%. CONCLUSION D-dimer as a stand-alone test may be safe for excluding proximal DVT and reduce the proportion of required ultrasounds. Prospective management studies are needed to confirm our findings.
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Aggarwal T, Eskandari A, Priya S, Mullan A, Garg I, Siembida J, Mullan B, Nagpal P. Pulmonary embolism rule out: positivity and factors affecting the yield of CT angiography. Postgrad Med J 2020; 96:594-599. [PMID: 31907225 DOI: 10.1136/postgradmedj-2019-137031] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 11/22/2019] [Accepted: 12/09/2019] [Indexed: 12/18/2022]
Abstract
OBJECTIVE CT pulmonary angiography (CTPA) is one of the most commonly ordered CT imaging tests. It is often believed to be overutilised with few recent studies showing a yield of less than 2%. This study aimed to determine the overall positivity rate of CTPA examinations and understand the factors that affect the yield of the CTPA examination. METHODS We retrospectively analysed 2713 patients who received the CTPA exam between 2016 and 2018. Type of study ordered (CTPA chest or CTPA chest with abdomen and pelvis CT), patient location (emergency department (ED), outpatient, inpatient, intensive care unit (ICU)) and patient characteristics-age, sex and body mass index (BMI) were recorded. A logistic regression analysis was performed to determine what factors affect the positivity rate of CT scans for pulmonary embolism (PE). RESULTS With 296 positive test results, the overall CTPA positivity was 10.9%. Male sex was associated with higher CTPA positivity, gender difference was maximum in 18-year to 35-year age group. Overweight and obese patients had significantly higher positivity as compared with BMI<25 (p<0.05). Higher positivity rate was seen in the BMI 25-40 group (11.9%) as compared with BMI>40 (10.1%) (p<0.05). Significant difference (p<0.001) was also found in CTPA examination yield from ICU (15.3%) versus inpatients (other than ICU) (12.4%) versus ED (9.6%), and outpatients (8.5%). The difference in CTPA yield based on the type of CT order (CTPA chest vs CTPA chest with CT abdomen and pelvis), patient's age and sex was not significant. CONCLUSION CTPA yield of 10.9% in this study is comparable to acceptable positivity rate for the USA and is higher than recent studies showing positivity of <2%. Patient characteristics like obesity and ICU or inpatient location are associated with higher rate of CT positivity.
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Affiliation(s)
- Tanya Aggarwal
- Department of Radiology, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
| | - Ali Eskandari
- Department of Radiology, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
| | - Sarv Priya
- Department of Radiology, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
| | - Aidan Mullan
- Statistics, University of California Berkeley, Berkeley, California, USA
| | - Ishan Garg
- Mayo Clinic Rochester, Rochester, Minnesota, USA
| | - Jakub Siembida
- Department of Radiology, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
| | - Brian Mullan
- Department of Radiology, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
| | - Prashant Nagpal
- Department of Radiology, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
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15
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Rudolf JW, Baron JM, Dighe AS. Order Indication Solicitation to Assess Clinical Laboratory Test Utilization: D-Dimer Order Patterns as an Illustrative Case. J Pathol Inform 2019; 10:36. [PMID: 31897353 PMCID: PMC6909549 DOI: 10.4103/jpi.jpi_46_19] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Accepted: 10/10/2019] [Indexed: 11/07/2022] Open
Abstract
Background: A common challenge in the development of laboratory clinical decision support (CDS) and laboratory utilization management (UM) initiatives stems from the fact that many laboratory tests have multiple potential indications, limiting the ability to develop context-specific alerts. As a potential solution, we designed a CDS alert that asks the ordering clinician to provide the indication for testing, using D-dimer as an exemplar. Using data collected over a nearly 3-year period, we sought to determine whether the indication capture was a useful feature within the CDS alert and whether it provided actionable intelligence to guide the development of an UM strategy. Methods: We extracted results and ordering data for D-dimer testing performed in our laboratory over a 35-month period. We analyzed order patterns by clinical indication, hospital service, and length of hospitalization. Results: Our final data set included 13,971 result-order combinations and indeed provided actionable intelligence regarding test utilization patterns. For example, pulmonary embolism was the most common emergency department indication (86%), while disseminated intravascular coagulation was the most common inpatient indication (56%). D-dimer positivity rates increased with the duration of hospitalization and our data suggested limited utility for ordering this test in the setting of suspected venous thromboembolic disease in admitted patients. In addition, we found that D-dimer was ordered for unexpected indications including the assessment of stroke, dissection, and extracorporeal membrane oxygenation. Conclusions: Indication capture within a CDS alert and correlation with result data can provide insight into order patterns which can be used to develop future CDS strategies to guide appropriate test use by clinical indication.
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Affiliation(s)
- Joseph W Rudolf
- Department of Laboratory Medicine and Pathology, University of Minnesota Medical School, Minneapolis, MN, USA.,Department of Pathology, Massachusetts General Hospital, Boston, MA, USA
| | - Jason M Baron
- Department of Pathology, Massachusetts General Hospital, Boston, MA, USA
| | - Anand S Dighe
- Department of Pathology, Massachusetts General Hospital, Boston, MA, USA
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Favresse J, Lippi G, Roy PM, Chatelain B, Jacqmin H, Ten Cate H, Mullier F. D-dimer: Preanalytical, analytical, postanalytical variables, and clinical applications. Crit Rev Clin Lab Sci 2019; 55:548-577. [PMID: 30694079 DOI: 10.1080/10408363.2018.1529734] [Citation(s) in RCA: 104] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
D-dimer is a soluble fibrin degradation product deriving from the plasmin-mediated degradation of cross-linked fibrin. D-dimer can hence be considered a biomarker of activation of coagulation and fibrinolysis, and it is routinely used for ruling out venous thromboembolism (VTE). D-dimer is increasingly used to assess the risk of VTE recurrence and to help define the optimal duration of anticoagulation treatment in patients with VTE, for diagnosing disseminated intravascular coagulation, and for screening medical patients at increased risk of VTE. This review is aimed at (1) revising the definition of D-dimer; (2) discussing preanalytical variables affecting the measurement of D-dimer; (3) reviewing and comparing assay performance and some postanalytical variables (e.g. different units and age-adjusted cutoffs); and (4) discussing the use of D-dimer measurement across different clinical settings.
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Affiliation(s)
- Julien Favresse
- a CHU UCL Namur, Namur Thrombosis and Hemostasis Center, Hematology Laboratory , Université Catholique de Louvain , Yvoir , Belgium
| | - Giuseppe Lippi
- b Section of Clinical Biochemistry , University Hospital of Verona , Verona , Italy
| | - Pierre-Marie Roy
- c Département de Médecine d'Urgence, CHU d'Angers, Institut MITOVASC , Université d'Angers , Angers , France
| | - Bernard Chatelain
- a CHU UCL Namur, Namur Thrombosis and Hemostasis Center, Hematology Laboratory , Université Catholique de Louvain , Yvoir , Belgium
| | - Hugues Jacqmin
- a CHU UCL Namur, Namur Thrombosis and Hemostasis Center, Hematology Laboratory , Université Catholique de Louvain , Yvoir , Belgium
| | - Hugo Ten Cate
- d Department of Internal Medicine, Cardiovascular Institute , Maastricht University Medical Center , Maastricht , the Netherlands
| | - François Mullier
- a CHU UCL Namur, Namur Thrombosis and Hemostasis Center, Hematology Laboratory , Université Catholique de Louvain , Yvoir , Belgium
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Oqab Z, Ganshorn H, Sheldon R. Prevalence of pulmonary embolism in patients presenting with syncope. A systematic review and meta-analysis. Am J Emerg Med 2018; 36:551-555. [DOI: 10.1016/j.ajem.2017.09.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 08/10/2017] [Accepted: 09/12/2017] [Indexed: 11/28/2022] Open
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Tan X, Chen G, Liu Y, Zhou L, He L, Liu D, Liu Y, Zhang F, Li H, Liu H. Serum D-dimer is a potential predictor for thromboembolism complications in patients with renal biopsy. Sci Rep 2017; 7:4836. [PMID: 28684778 PMCID: PMC5500525 DOI: 10.1038/s41598-017-05210-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 05/24/2017] [Indexed: 12/31/2022] Open
Abstract
Renal biopsy has been widely recommended in clinic to determine the histological patterns of kidney disease. To prevent bleeding complications, patients should routinely stop anticoagulants prior to renal biopsy. However, patients with kidney disease are susceptible to thromboembolisms, particularly in those with severe hypoalbuminemia. This study was designed to investigate the application of serum D-dimer as a predictor for thrombotic events after renal biopsy. 400 consecutive native renal biopsies were prospectively included in this 2-month follow-up study. The overall incidence of bleeding and thrombotic complication is 4%, including hematuria or large perinephric hematoma (2.5%, n = 10) and thrombotic complication (1.5%, n = 6). Compared to low serum D-dimer (<2.00 μg/ml), subjects in the group of high serum D-dimer (≥2.00 μg/ml) were more incline to develop thrombotic complications (9.1% versus 0.3%; RR, 30.33; p < 0.001). D-dimer correlated positively with age (rs = 0.258, P < 0.001). Inverse correlations were found for albumin (rs = −0.339, P < 0.001). Taken together, patients with high serum D-dimer carry an increased risk of thrombotic complications after renal biopsy. Our findings suggest that serum D-dimer can serve as a potential predictor for thrombotic events in patients with kidney disease. Further cautions should be given to these subjects.
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Affiliation(s)
- Xia Tan
- Department of Nephrology, The Second Xiangya Hospital of Central South University. Renal Research Institute of Central South University, Key Lab of Kidney Disease and Blood Purification in Hunan, Changsha, China
| | - Guochun Chen
- Department of Nephrology, The Second Xiangya Hospital of Central South University. Renal Research Institute of Central South University, Key Lab of Kidney Disease and Blood Purification in Hunan, Changsha, China
| | - Yu Liu
- Department of Nephrology, The Second Xiangya Hospital of Central South University. Renal Research Institute of Central South University, Key Lab of Kidney Disease and Blood Purification in Hunan, Changsha, China
| | - Letian Zhou
- Department of Nephrology, The Second Xiangya Hospital of Central South University. Renal Research Institute of Central South University, Key Lab of Kidney Disease and Blood Purification in Hunan, Changsha, China
| | - Liyu He
- Department of Nephrology, The Second Xiangya Hospital of Central South University. Renal Research Institute of Central South University, Key Lab of Kidney Disease and Blood Purification in Hunan, Changsha, China
| | - Di Liu
- Department of Nephrology, The Second Xiangya Hospital of Central South University. Renal Research Institute of Central South University, Key Lab of Kidney Disease and Blood Purification in Hunan, Changsha, China
| | - Yexin Liu
- Department of Nephrology, The Second Xiangya Hospital of Central South University. Renal Research Institute of Central South University, Key Lab of Kidney Disease and Blood Purification in Hunan, Changsha, China
| | - Fan Zhang
- Department of Nephrology, The Second Xiangya Hospital of Central South University. Renal Research Institute of Central South University, Key Lab of Kidney Disease and Blood Purification in Hunan, Changsha, China
| | - Huiqiong Li
- Department of Nephrology, The Second Xiangya Hospital of Central South University. Renal Research Institute of Central South University, Key Lab of Kidney Disease and Blood Purification in Hunan, Changsha, China
| | - Hong Liu
- Department of Nephrology, The Second Xiangya Hospital of Central South University. Renal Research Institute of Central South University, Key Lab of Kidney Disease and Blood Purification in Hunan, Changsha, China.
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Thromboelastographic predictors of venous thromboembolic events in critically ill patients. Blood Coagul Fibrinolysis 2016; 27:804-811. [DOI: 10.1097/mbc.0000000000000503] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Saghazadeh A, Rezaei N. Inflammation as a cause of venous thromboembolism. Crit Rev Oncol Hematol 2016; 99:272-85. [DOI: 10.1016/j.critrevonc.2016.01.007] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2015] [Revised: 11/27/2015] [Accepted: 01/12/2016] [Indexed: 12/12/2022] Open
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Raja AS, Greenberg JO, Qaseem A, Denberg TD, Fitterman N, Schuur JD. Evaluation of Patients With Suspected Acute Pulmonary Embolism: Best Practice Advice From the Clinical Guidelines Committee of the American College of Physicians. Ann Intern Med 2015; 163:701-11. [PMID: 26414967 DOI: 10.7326/m14-1772] [Citation(s) in RCA: 197] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
DESCRIPTION Pulmonary embolism (PE) can be a severe disease and is difficult to diagnose, given its nonspecific signs and symptoms. Because of this, testing patients with suspected acute PE has increased dramatically. However, the overuse of some tests, particularly computed tomography (CT) and plasma d-dimer measurement, may not improve care while potentially leading to patient harm and unnecessary expense. METHODS The literature search encompassed studies indexed by MEDLINE (1966-2014; English-language only) and included all clinical trials and meta-analyses on diagnostic strategies, decision rules, laboratory tests, and imaging studies for the diagnosis of PE. This document is not based on a formal systematic review, but instead seeks to provide practical advice based on the best available evidence and recent guidelines. The target audience for this paper is all clinicians; the target patient population is all adults, both inpatient and outpatient, suspected of having acute PE. BEST PRACTICE ADVICE 1 Clinicians should use validated clinical prediction rules to estimate pretest probability in patients in whom acute PE is being considered. BEST PRACTICE ADVICE 2 Clinicians should not obtain d-dimer measurements or imaging studies in patients with a low pretest probability of PE and who meet all Pulmonary Embolism Rule-Out Criteria. BEST PRACTICE ADVICE 3 Clinicians should obtain a high-sensitivity d-dimer measurement as the initial diagnostic test in patients who have an intermediate pretest probability of PE or in patients with low pretest probability of PE who do not meet all Pulmonary Embolism Rule-Out Criteria. Clinicians should not use imaging studies as the initial test in patients who have a low or intermediate pretest probability of PE. BEST PRACTICE ADVICE 4 Clinicians should use age-adjusted d-dimer thresholds (age × 10 ng/mL rather than a generic 500 ng/mL) in patients older than 50 years to determine whether imaging is warranted. BEST PRACTICE ADVICE 5 Clinicians should not obtain any imaging studies in patients with a d-dimer level below the age-adjusted cutoff. BEST PRACTICE ADVICE 6 Clinicians should obtain imaging with CT pulmonary angiography (CTPA) in patients with high pretest probability of PE. Clinicians should reserve ventilation-perfusion scans for patients who have a contraindication to CTPA or if CTPA is not available. Clinicians should not obtain a d-dimer measurement in patients with a high pretest probability of PE.
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Affiliation(s)
- Ali S. Raja
- From Massachusetts General Hospital and Brigham and Women's Hospital, Boston, Massachusetts; American College of Physicians, Philadelphia, Pennsylvania; Hofstra North Shore Long Island Jewish School of Medicine, Huntington, New York; and Carilion Clinic, Roanoke, Virginia
| | - Jeffrey O. Greenberg
- From Massachusetts General Hospital and Brigham and Women's Hospital, Boston, Massachusetts; American College of Physicians, Philadelphia, Pennsylvania; Hofstra North Shore Long Island Jewish School of Medicine, Huntington, New York; and Carilion Clinic, Roanoke, Virginia
| | - Amir Qaseem
- From Massachusetts General Hospital and Brigham and Women's Hospital, Boston, Massachusetts; American College of Physicians, Philadelphia, Pennsylvania; Hofstra North Shore Long Island Jewish School of Medicine, Huntington, New York; and Carilion Clinic, Roanoke, Virginia
| | - Thomas D. Denberg
- From Massachusetts General Hospital and Brigham and Women's Hospital, Boston, Massachusetts; American College of Physicians, Philadelphia, Pennsylvania; Hofstra North Shore Long Island Jewish School of Medicine, Huntington, New York; and Carilion Clinic, Roanoke, Virginia
| | - Nick Fitterman
- From Massachusetts General Hospital and Brigham and Women's Hospital, Boston, Massachusetts; American College of Physicians, Philadelphia, Pennsylvania; Hofstra North Shore Long Island Jewish School of Medicine, Huntington, New York; and Carilion Clinic, Roanoke, Virginia
| | - Jeremiah D. Schuur
- From Massachusetts General Hospital and Brigham and Women's Hospital, Boston, Massachusetts; American College of Physicians, Philadelphia, Pennsylvania; Hofstra North Shore Long Island Jewish School of Medicine, Huntington, New York; and Carilion Clinic, Roanoke, Virginia
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Blasi F, Oliveira BL, Rietz TA, Rotile NJ, Day H, Naha PC, Cormode DP, Izquierdo-Garcia D, Catana C, Caravan P. Radiation Dosimetry of the Fibrin-Binding Probe ⁶⁴Cu-FBP8 and Its Feasibility for PET Imaging of Deep Vein Thrombosis and Pulmonary Embolism in Rats. J Nucl Med 2015; 56:1088-93. [PMID: 25977464 DOI: 10.2967/jnumed.115.157982] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2015] [Accepted: 04/27/2015] [Indexed: 01/07/2023] Open
Abstract
UNLABELLED The diagnosis of deep venous thromboembolic disease is still challenging despite the progress of current thrombus imaging modalities and new diagnostic algorithms. We recently reported the high target uptake and thrombus imaging efficacy of the novel fibrin-specific PET probe (64)Cu-FBP8. Here, we tested the feasibility of (64)Cu-FBP8 PET to detect source thrombi and culprit emboli after deep vein thrombosis and pulmonary embolism (DVT-PE). To support clinical translation of (64)Cu-FBP8, we performed a human dosimetry estimation using time-dependent biodistribution in rats. METHODS Sprague-Dawley rats (n = 7) underwent ferric chloride application on the femoral vein to trigger thrombosis. Pulmonary embolism was induced 30 min or 2 d after DVT by intrajugular injection of a preformed blood clot labeled with (125)I-fibrinogen. PET imaging was performed to detect the clots, and SPECT was used to confirm in vivo the location of the pulmonary emboli. Ex vivo γ counting and histopathology were used to validate the imaging findings. Detailed biodistribution was performed in healthy rats (n = 30) at different time points after (64)Cu-FBP8 administration to estimate human radiation dosimetry. Longitudinal whole-body PET/MR imaging (n = 2) was performed after (64)Cu-FBP8 administration to further assess radioactivity clearance. RESULTS (64)Cu-FBP8 PET imaging detected the location of lung emboli and venous thrombi after DVT-PE, revealing significant differences in uptake between target and background tissues (P < 0.001). In vivo SPECT imaging and ex vivo γ counting confirmed the location of the lung emboli. PET quantification of the venous thrombi revealed that probe uptake was greater in younger clots than in older ones, a result confirmed by ex vivo analyses (P < 0.001). Histopathology revealed an age-dependent reduction of thrombus fibrin content (P = 0.006), further supporting the imaging findings. Biodistribution and whole-body PET/MR imaging showed a rapid, primarily renal, body clearance of (64)Cu-FBP8. The effective dose was 0.021 mSv/MBq for males and 0.027 mSv/MBq for females, supporting the feasibility of using (64)Cu-FBP8 in human trials. CONCLUSION We showed that (64)Cu-FBP8 PET is a feasible approach to image DVT-PE and that radiogenic adverse health effects should not limit the clinical translation of (64)Cu-FBP8.
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Affiliation(s)
- Francesco Blasi
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts
| | - Bruno L Oliveira
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts
| | - Tyson A Rietz
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts
| | - Nicholas J Rotile
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts
| | - Helen Day
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts
| | - Pratap C Naha
- Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania; and
| | - David P Cormode
- Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania; and
| | - David Izquierdo-Garcia
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts
| | - Ciprian Catana
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts
| | - Peter Caravan
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts Institute for Innovation in Imaging, Massachusetts General Hospital, Boston, Massachusetts
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Abstract
BACKGROUND Plasma D-dimer tests are currently used to exclude deep vein thrombosis and pulmonary embolism. Human saliva has numerous advantages over blood as a diagnostic sample. The aims of our study were to develop a reliable immunoassay to detect D-dimer levels in saliva, and to determine the correlation between salivary and blood D-dimer levels. RESULTS/METHODOLOGY: Saliva and blood samples were collected from 40 healthy volunteers. We developed a AlphaLISA® immunoassay with acceptable analytical performances to quantify D-dimer levels in the samples. The median salivary D-dimer levels were 138.1 ng/ml (morning) and 140.7 ng/ml (afternoon), and the plasma levels were 75.0 ng/ml. Salivary D-dimer levels did not correlate with plasma levels (p = 0.61). CONCLUSION For the first time, we have quantified D-dimer levels and found twofold increase in saliva (p < 0.05) than in plasma. Further studies are required to demonstrate the clinical relevance/utility of salivary D-dimer in patients with confirmed deep vein thrombosis and/or pulmonary embolism.
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van der Hulle T, den Exter PL, Mos ICM, Kamphuisen PW, Hovens MMC, Kruip MJHA, van Es J, ten Cate H, Huisman MV, Klok FA. Optimization of the diagnostic management of clinically suspected pulmonary embolism in hospitalized patients. Br J Haematol 2014; 167:681-6. [DOI: 10.1111/bjh.13090] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2014] [Accepted: 07/09/2014] [Indexed: 11/28/2022]
Affiliation(s)
- Tom van der Hulle
- Department of Thrombosis and Haemostasis; LUMC; Leiden The Netherlands
| | - Paul L. den Exter
- Department of Thrombosis and Haemostasis; LUMC; Leiden The Netherlands
| | - Inge C. M. Mos
- Department of Thrombosis and Haemostasis; LUMC; Leiden The Netherlands
| | - Pieter W. Kamphuisen
- Department of Vascular Medicine; University Medical Centre Groningen; Groningen The Netherlands
| | | | | | - Josien van Es
- Department of Vascular Medicine; Academic Medical Centre; Amsterdam The Netherlands
| | - Hugo ten Cate
- Department of Internal Medicine and Cardiovascular Research Institute Maastricht; Maastricht University Medical Centre; Maastricht The Netherlands
| | - Menno V. Huisman
- Department of Thrombosis and Haemostasis; LUMC; Leiden The Netherlands
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Abstract
Dyspnea is a subjective and nonspecific symptom, yet very distressing for those who experience it. Acute onset dyspnea and exacerbation of chronic dyspnea from heart or lung disease significantly add to the number of emergency department visits and inpatient admissions. Although dyspnea may appear to be a simple condition to evaluate and manage, it is actually complex in description and quality. As such, dyspnea is the first symptom of many diseases. The onset of dyspnea can be due to a new acute disease, the exacerbation of an existing chronic illness, or a new disease compounding a chronic illness. Finding the cause of dyspnea is generally more difficult than it originally may appear. Therefore, the purpose of this article is to discuss the differential diagnoses associated with dyspnea.
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Affiliation(s)
- Beth Croucher
- Beth Croucher is Nurse Practitioner, Medical Intensive Care, Department of Pulmonary/Critical Care, Ohio State University Wexner Medical Center, 410 W 10th Ave, Columbus, OH 43210
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Kim TK, Oh SW, Mok YJ, Choi EY. Fluorescence immunoassay of human D-dimer in whole blood. J Clin Lab Anal 2014; 28:294-300. [PMID: 24578175 DOI: 10.1002/jcla.21683] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Accepted: 08/21/2013] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND D-dimer is a widely used biomarker for the initial clinical assessment of suspected deep vein thrombosis and pulmonary embolism. Here, we presented a new fluorescence (FL) D-dimer assay system, which was developed with a platform of point-of-care test (POCT) for clinical applications. METHODS Whole blood was mixed with FL-labeled anti-D-dimer detector antibody, and then loaded onto a disposable cartridge. After 12 min of incubation, the FL intensity was acquired by scanning of test cartridge and converted as level of D-dimer in a laser FL scanner. The analytical performance of FL immunoassay was evaluated by linearity, recovery, and precision tests. The comparability of the developed assay was examined with automated reference methods. RESULTS The FL assay system showed a good linearity, and the analytical mean recovery of control was 103% in a dynamic working range. The imprecision of intra- and inter-as-say of coefficient of variations from assay system was less than 8%. The developed FL assay system showed strong correlation with two automated reference assays, Vidas D-dimer (r = 0.973) and Stalia D-dimer (r = 0.971). CONCLUSION The new FL immunoassay for D-dimer is a user-friendly, precise, and reproducible platform of POCT in whole blood.
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Affiliation(s)
- Tae Kyum Kim
- Department of Biomedical Science, Hallym University, Chuncheon, South Korea; BodiTech Med, Inc, Chuncheon, South Korea
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Lippi G, Favaloro EJ, Plebani M. Proteomic analysis of venous thromboembolism. Expert Rev Proteomics 2014; 7:275-82. [DOI: 10.1586/epr.09.108] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Crop MJ, Siemes C, Berendes P, van der Straaten F, Willemsen S, Levin MD. Influence of C-reactive protein levels and age on the value of D-dimer in diagnosing pulmonary embolism. Eur J Haematol 2013; 92:147-55. [DOI: 10.1111/ejh.12218] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/16/2013] [Indexed: 11/27/2022]
Affiliation(s)
- Meindert Johannes Crop
- Department of Internal Medicine; Albert Schweitzer Hospital; Dordrecht the Netherlands
- Department of Internal Medicine; Erasmus Medical Center; Rotterdam the Netherlands
| | - Claire Siemes
- Department of Internal Medicine; Amphia Hospital Molengracht; Breda the Netherlands
| | - Paul Berendes
- Department of Clinical Chemistry; Albert Schweitzer Hospital; Dordrecht the Netherlands
| | | | - Sten Willemsen
- Department of Biostatistics; Erasmus Medical Center; Rotterdam the Netherlands
| | - Mark-David Levin
- Department of Internal Medicine; Albert Schweitzer Hospital; Dordrecht the Netherlands
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The utility of screening for asymptomatic lower extremity deep venous thrombosis during inflammatory bowel disease flares: a pilot study. Inflamm Bowel Dis 2013; 19:1053-8. [PMID: 23429463 DOI: 10.1097/mib.0b013e3182802a65] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND Asymptomatic deep vein thrombosis (DVT) occurs in up to 11% of medical inpatients. The incidence of asymptomatic DVT among patients with inflammatory bowel disease (IBD) is unknown but may be even higher. D-dimer is effective for DVT screening, but its utility has not been studied in the IBD population. METHODS Hospitalized and ambulatory patients with IBD during flares were recruited between 2009 and 2011. Those with clinical symptoms of venous thromboembolism or previous venous thromboembolism were excluded. We determined the prevalence of DVT among asymptomatic subjects using lower extremity Doppler ultrasound and assessed the performance characteristics of the D-dimer in this high-risk study population. RESULTS We enrolled 101 hospitalized and 49 ambulatory patients with IBD during active flares. There were no cases of proximal DVT detected by lower extremity Doppler ultrasound. The 95% confidence interval (CI) for the rate of proximal DVT was 0% to 2%. D-dimer was elevated in 60% of subjects without DVT, occurring more frequently among hospitalized than ambulatory subjects [89% versus 65%, P = 0.01; adjusted odds ratio (aOR), 4.16, 95% CI, 1.58-10.9]. Other predictors of elevated D-dimer were incremental decade in age (aOR, 1.97; 95% CI, 1.24-3.14); ulcerative colitis versus Crohn's disease diagnosis (aOR, 3.38; 95% CI, 1.29-8.84); and every 10-unit increase in C-reactive protein (aOR, 1.33; 95% CI, 1.09-1.62). CONCLUSION From this pilot study, there appears to be low prevalence of asymptomatic DVTs among patients with IBD during flares. The high prevalence of elevated D-dimer in DVT-negative patients limits its utility in IBD.
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Perveen S, Unwin D, Shetty AL. Point of care D-dimer testing in the emergency department: a bioequivalence study. Ann Lab Med 2012; 33:34-8. [PMID: 23301220 PMCID: PMC3535194 DOI: 10.3343/alm.2013.33.1.34] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2012] [Revised: 08/30/2012] [Accepted: 11/01/2012] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND D-dimer is used widely as a diagnostic aid in low- and moderate-risk patients with suspected venous thromboembolism (VTE). While our laboratory utilizes VIDAS D-dimer analyzer (bioMérieux SA, France), our emergency department (ED) recently procured a D-dimer analyzer AQT90 FLEX (Radiometer Medical ApS, Denmark) for point of care testing (POCT) to facilitate patient management. We aimed to determine whether the time taken to receive D-dimer results using the 2 different analyzers differed significantly and to quantify the limits of agreement between the results of the 2 methods measured on the same patient. METHODS Adult patients presenting to the ED and requiring diagnostic workup for suspected VTE were included in this prospective observational study. Patients underwent simultaneous D-dimer measurements using the 2 different analyzers. RESULTS The paired results from 104 patients were analyzed. The median time for the D-dimer results from triage by VIDAS was 258 min (Inter-quartile range [IQR], 173-360) and by POCT was 146 min (IQR, 55-280.5); the median time difference was 101.5 min (IQR, 82-125.5). On an average, POCT D-dimer values were 15% lower on the same sample (limits of agreement, 34-213%). POCT predicted 83% of VIDAS positive results (sensitivity, 83.3% [95% confidence interval (CI), 70.4-91.3%]; specificity, 100% [95% CI, 93.6-100%]). All patients with positive imaging were identified correctly by both methods. CONCLUSIONS POCT delivers D-dimer results in significantly shorter turnaround times than pathology services; however, poor bioequivalence between VIDAS and POCT raises the issue of acceptability for use in the ED.
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Douketis JD, Ginsberg JS, Haley S, Julian J, Dwyer M, Levine M, Eisenberg PR, Smart R, Tsui W, White RH, Morris TA, Kaatz S, Comp PC, Crowther MA, Kearon C, Kassis J, Bates SM, Schulman S, Desjardins L, Taillefer R, Begelman SM, Gerometta M. Accuracy and safety of (99m)Tc-labeled anti-D-dimer (DI-80B3) Fab' fragments (ThromboView®) in the diagnosis of deep vein thrombosis: a phase II study. Thromb Res 2012; 130:381-9. [PMID: 22658414 DOI: 10.1016/j.thromres.2012.05.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Revised: 05/02/2012] [Accepted: 05/08/2012] [Indexed: 10/28/2022]
Abstract
BACKGROUND The assessment of patients with suspected deep vein thrombosis (DVT) remains challenging despite current diagnostic algorithms. (99m)Tc-labelled DI-DD3B6/22-80B3 Fab´ fragments ((99m)Tc-DI-80B3, ThromboView®) is a novel diagnostic test that uses a radiolabelled humanized monoclonal antibody fragment specific for the D-dimer region of cross-linked fibrin to detect DVT. This test has an anatomic component to locate DVT and a functional component to differentiate acute (newly formed) thrombus from inactive (old) thrombus. METHODS In a multi-centre prospective cohort trial we investigated the diagnostic accuracy and safety of (99m)Tc-DI-80B3 in consecutive patients with suspected DVT who had the diagnosis confirmed or excluded by venography. RESULTS We enrolled 94 patients with suspected DVT of whom 12 did not have (99m)Tc-DI-80B3 imaging, leaving 82 patients for the safety analysis. Of these patients, there were 16 with non-evaluable imaging (11 venography, 7 (99m)Tc-DI-80B3, both in two patients) leaving 66 patients for the accuracy analysis. (99m)Tc-DI-80B3 imaging was well-tolerated: 2 patients developed urticaria; none developed serious adverse events. For proximal DVT, the sensitivity (84.2%; 95% confidence interval [CI]: 62.4-94.5) and specificity (97.6%; CI: 83.3-99.4) were highest when the combined 0.25-hour and 3-hour (99m)Tc-DI-80B3 images were used. The accuracy was lower for distal DVT, irrespective of the images used. There were insufficient patients to comment on the accuracy of (99m)Tc-DI-80B3 imaging for suspected recurrent DVT. CONCLUSIONS (99m)Tc-DI-80B3 (ThromboView®) is a novel diagnostic modality for patients with suspected DVT with a promising accuracy and safety profile that justifies additional clinical development in diagnostic accuracy and clinical management studies.
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Parshall MB, Schwartzstein RM, Adams L, Banzett RB, Manning HL, Bourbeau J, Calverley PM, Gift AG, Harver A, Lareau SC, Mahler DA, Meek PM, O'Donnell DE. An official American Thoracic Society statement: update on the mechanisms, assessment, and management of dyspnea. Am J Respir Crit Care Med 2012; 185:435-52. [PMID: 22336677 PMCID: PMC5448624 DOI: 10.1164/rccm.201111-2042st] [Citation(s) in RCA: 1109] [Impact Index Per Article: 92.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Dyspnea is a common, distressing symptom of cardiopulmonary and neuromuscular diseases. Since the ATS published a consensus statement on dyspnea in 1999, there has been enormous growth in knowledge about the neurophysiology of dyspnea and increasing interest in dyspnea as a patient-reported outcome. PURPOSE The purpose of this document is to update the 1999 ATS Consensus Statement on dyspnea. METHODS An interdisciplinary committee of experts representing ATS assemblies on Nursing, Clinical Problems, Sleep and Respiratory Neurobiology, Pulmonary Rehabilitation, and Behavioral Science determined the overall scope of this update through group consensus. Focused literature reviews in key topic areas were conducted by committee members with relevant expertise. The final content of this statement was agreed upon by all members. RESULTS Progress has been made in clarifying mechanisms underlying several qualitatively and mechanistically distinct breathing sensations. Brain imaging studies have consistently shown dyspnea stimuli to be correlated with activation of cortico-limbic areas involved with interoception and nociception. Endogenous and exogenous opioids may modulate perception of dyspnea. Instruments for measuring dyspnea are often poorly characterized; a framework is proposed for more consistent identification of measurement domains. CONCLUSIONS Progress in treatment of dyspnea has not matched progress in elucidating underlying mechanisms. There is a critical need for interdisciplinary translational research to connect dyspnea mechanisms with clinical treatment and to validate dyspnea measures as patient-reported outcomes for clinical trials.
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Parshall MB, Schwartzstein RM, Adams L, Banzett RB, Manning HL, Bourbeau J, Calverley PM, Gift AG, Harver A, Lareau SC, Mahler DA, Meek PM, O'Donnell DE. An official American Thoracic Society statement: update on the mechanisms, assessment, and management of dyspnea. Am J Respir Crit Care Med 2012. [PMID: 22336677 DOI: 10.1164/rccm.201111–2042st] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Dyspnea is a common, distressing symptom of cardiopulmonary and neuromuscular diseases. Since the ATS published a consensus statement on dyspnea in 1999, there has been enormous growth in knowledge about the neurophysiology of dyspnea and increasing interest in dyspnea as a patient-reported outcome. PURPOSE The purpose of this document is to update the 1999 ATS Consensus Statement on dyspnea. METHODS An interdisciplinary committee of experts representing ATS assemblies on Nursing, Clinical Problems, Sleep and Respiratory Neurobiology, Pulmonary Rehabilitation, and Behavioral Science determined the overall scope of this update through group consensus. Focused literature reviews in key topic areas were conducted by committee members with relevant expertise. The final content of this statement was agreed upon by all members. RESULTS Progress has been made in clarifying mechanisms underlying several qualitatively and mechanistically distinct breathing sensations. Brain imaging studies have consistently shown dyspnea stimuli to be correlated with activation of cortico-limbic areas involved with interoception and nociception. Endogenous and exogenous opioids may modulate perception of dyspnea. Instruments for measuring dyspnea are often poorly characterized; a framework is proposed for more consistent identification of measurement domains. CONCLUSIONS Progress in treatment of dyspnea has not matched progress in elucidating underlying mechanisms. There is a critical need for interdisciplinary translational research to connect dyspnea mechanisms with clinical treatment and to validate dyspnea measures as patient-reported outcomes for clinical trials.
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Moores LK, King CS, Holley AB. Current approach to the diagnosis of acute nonmassive pulmonary embolism. Chest 2011; 140:509-518. [PMID: 21813530 DOI: 10.1378/chest.10-2468] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Pulmonary embolism is a common and potentially lethal disease. Given the variable presentation and associated morbidity of this condition, an accurate and efficient diagnostic algorithm is required. Clinical pretest probability serves as the root of any diagnostic approach. We, thus, review several clinical decision rules that may help standardize this determination. Using a review of the literature, the accuracy, predictive values, and likelihood ratios for several diagnostic tests are described. The combination of these tests, based on the pretest probability of disease, can be used in a Bayesian fashion to make accurate treatment decisions. A completely noninvasive diagnostic algorithm for patients presenting with suspected acute pulmonary embolism is proposed.
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Affiliation(s)
- Lisa K Moores
- Department of Medicine, the Uniformed Services University of the Health Sciences, Bethesda, MD.
| | - Christopher S King
- Pulmonary and Critical Care Medicine Service, William Beaumont Army Medical Center, El Paso, TX
| | - Aaron B Holley
- Pulmonary, Critical Care, and Sleep Medicine Service, Walter Reed Army Medical Center, Washington, DC
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Warren DJ, Matthews S. Pulmonary embolism: investigation of the clinically assessed intermediate risk subgroup. Br J Radiol 2011; 85:37-43. [PMID: 21937613 DOI: 10.1259/bjr/17451818] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
OBJECTIVES The simplified Wells pre-test probability scoring algorithm for pre-investigation evaluation of pulmonary emboli (PE) is a commonly utilised and validated assessment tool. We sought to identify whether use of a dichotomised scoring system altered the overall negative predictive value (NPV) in patients referred for CT pulmonary angiography (CTPA) assessment of suspected PE. METHODS Prospective data collection of all patients referred for CTPA evaluation of suspected acute PE during a 3 year period was carried out. Pre-test risk stratification was performed according to simplified Wells criteria in conjunction with plasma d-Dimer (Bio-Pool and IL test) estimation. Retrospective dichotomisation was also performed. RESULTS 2531 patients were investigated for suspected acute PE; acute thromboemboli were confirmed in 22.7%. The overall NPV for negative d-Dimer and intermediate pre-test probability (PTP) was 98.9% [95% confidence interval (CI) 96.3-99.7%]; with retrospective dichotomisation, the NPV for the PE unlikely group was 99.0% (95% CI 94.8-99.8%). Implementation of dichotomised scoring, excluding PE unlikely with negative d-Dimer cases from further imaging, would have yielded a 4% reduction in CTPA referral pathway imaging at our institution. CONCLUSION We demonstrate no significant difference between exclusion in the intermediate subgroup and the retrospectively dichotomised PE unlikely group and demonstrate the high negative predictive power of the Bio-Pool and IL tests in conjunction with the Wells PTP tool. Prior to implementation of new guidelines for exclusion of patients with suspected PE from further imaging, hospitals should audit their own practice and validate the d-Dimer assay utilised at their institution.
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Affiliation(s)
- D J Warren
- Radiology Department, Royal Hallamshire Hospital, Sheffield NHS Teaching Hospitals Trust, Sheffield, UK.
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Machnowska M, Burbridge BE, Fladeland D. Are Pretest Clinical Probability Algorithms used before Obtaining Multidetector Computed Tomographic Pulmonary Embolism Studies? Can Assoc Radiol J 2011; 62:107-9. [DOI: 10.1016/j.carj.2010.03.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2009] [Revised: 03/03/2010] [Accepted: 03/04/2010] [Indexed: 10/19/2022] Open
Affiliation(s)
- Matylda Machnowska
- Department of Medical Imaging, Royal University Hospital, Saskatoon, Saskatchewan, Canada
| | - Brent E. Burbridge
- Department of Medical Imaging, Royal University Hospital, Saskatoon, Saskatchewan, Canada
| | - Derek Fladeland
- Department of Medical Imaging, Royal University Hospital, Saskatoon, Saskatchewan, Canada
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Kesieme E, Kesieme C, Jebbin N, Irekpita E, Dongo A. Deep vein thrombosis: a clinical review. J Blood Med 2011; 2:59-69. [PMID: 22287864 PMCID: PMC3262341 DOI: 10.2147/jbm.s19009] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Indexed: 01/01/2023] Open
Abstract
Background: Deep vein thrombosis (DVT) is the formation of blood clots (thrombi) in the deep veins. It commonly affects the deep leg veins (such as the calf veins, femoral vein, or popliteal vein) or the deep veins of the pelvis. It is a potentially dangerous condition that can lead to preventable morbidity and mortality. Aim: To present an update on the causes and management of DVT. Methods: A review of publications obtained from Medline search, medical libraries, and Google. Results: DVT affects 0.1% of persons per year. It is predominantly a disease of the elderly and has a slight male preponderance. The approach to making a diagnosis currently involves an algorithm combining pretest probability, D-dimer testing, and compression ultrasonography. This will guide further investigations if necessary. Prophylaxis is both mechanical and pharmacological. The goals of treatment are to prevent extension of thrombi, pulmonary embolism, recurrence of thrombi, and the development of complications such as pulmonary hypertension and post-thrombotic syndrome. Conclusion: DVT is a potentially dangerous condition with a myriad of risk factors. Prophylaxis is very important and can be mechanical and pharmacological. The mainstay of treatment is anticoagulant therapy. Low-molecular-weight heparin, unfractionated heparin, and vitamin K antagonists have been the treatment of choice. Currently anticoagulants specifically targeting components of the common pathway have been recommended for prophylaxis. These include fondaparinux, a selective indirect factor Xa inhibitor and the new oral selective direct thrombin inhibitors (dabigatran) and selective factor Xa inhibitors (rivaroxaban and apixaban). Others are currently undergoing trials. Thrombolytics and vena caval filters are very rarely indicated in special circumstances.
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Affiliation(s)
- Emeka Kesieme
- Department of Surgery, Irrua Specialist Teaching Hospital, Irrua, Nigeria
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Taute BM, Melnyk H, Podhaisky H. Alternative sonographische Diagnosen bei klinischem Thromboseverdacht. ACTA ACUST UNITED AC 2010; 105:619-26. [DOI: 10.1007/s00063-010-1101-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2010] [Accepted: 07/05/2010] [Indexed: 11/30/2022]
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Sasahara A, Michota F, McKean SC, Deitelzweig SB, Jacobson A. Optimizing management of venous thromboembolism: diagnosis, treatment, and secondary prevention. J Hosp Med 2009; 4:S16-23. [PMID: 19830848 DOI: 10.1002/jhm.586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Arthur Sasahara
- Cardiovascular Division, Brigham & Women's Hospital, Boston, MA 02461-1154, USA.
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Bruinstroop E, van de Ree MA, Huisman MV. The use of D-dimer in specific clinical conditions: a narrative review. Eur J Intern Med 2009; 20:441-6. [PMID: 19712840 DOI: 10.1016/j.ejim.2008.12.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2008] [Revised: 11/05/2008] [Accepted: 12/18/2008] [Indexed: 10/21/2022]
Abstract
The use of D-dimer in combination with a clinical decision rule has been widely investigated in pulmonary embolism and deep venous thrombosis. Although it has been shown to be safe in excluding venous thromboembolism, the clinician is often faced with specific situations in which the use of D-dimer is controversial. We review the best available evidence on these patients. We conclude that it is not safe to use D-dimer testing in patients with symptoms of a venous thromboembolism for over 14 days, patients receiving therapeutic heparin treatment and patients with suspected deep venous thrombosis during oral anticoagulant therapy. In these populations the levels of D-dimer can be lower then expected giving rise to false-negative results. It is safe to use D-dimer testing in combination with a clinical decision rule in patients of all ages, patients presenting with a suspected recurrent venous thromboembolism or inpatients with suspected pulmonary embolism. As patients with recurrent venous thromboembolism, elderly patients and inpatients have higher levels of D-dimer, D-dimer testing has a low specificity and the need for additional radiological testing is increased.
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Affiliation(s)
- E Bruinstroop
- Diakonessenhuis, Department of Internal Medicine, Bosboomstraat 1, 3582 KE Utrecht, The Netherlands
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Haas FJLM, Schutgens REG, Biesma DH. An age-adapted approach for the use of D-dimers in the exclusion of deep venous thrombosis. Am J Hematol 2009; 84:488-91. [PMID: 19554552 DOI: 10.1002/ajh.21455] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A normal D-dimer (DD) concentration for the exclusion of deep venous thrombosis (DVT) has a low specificity in older patients and compression ultrasonography is often required. Three D-dimer assays, STA Liatest, Tina-quant, and Innovance, are evaluated in symptomatic outpatients suspected for DVT with emphasis on its performance in older patients by using different cut-off levels. This study includes 466 outpatients suspected for having DVT. The diagnostic accuracy, measured as sensitivity and area under the curve of the receiver operation characteristic curve is good for all DD assays. The specificity of the DD assays combined with a low pretest probability varies from 42.6 to 51.5%. The specificity of the three DD assays in patients > or = 60 years varies, however, between 24.6 and 40.9%. Several cut-off values in different age-subgroups are studied. For patients < 60 years, the most accurate cut-off value is 500 microg/L for all DD assays. For patients > or = 60 years, a threshold of 750 microg/L has the best results with NPV of 100% for all assays and specificity of 48.5% (STA Liatest), 60.6% (Tina-quant), and 49.2% (Innovance), respectively. For the three assays, the number needed to test (NNT) decreases in both subgroups of patients compared to the standard algorithm. A cut-off level of 750 microg/L for patients > or = 60 years improves the clinical performance of DD assays in combination with the PTP score without the loss of NPV. The NNT improves substantially with an age-adapted algorithm.
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Affiliation(s)
- Fred J L M Haas
- Department of Clinical Chemistry, St. Antonius Hospital, 3430 EM Nieuwegein, The Netherlands.
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Strouse JJ, Tamma P, Kickler TS, Takemoto CM. D-dimer for the diagnosis of venous thromboembolism in children. Am J Hematol 2009; 84:62-3. [PMID: 19006230 DOI: 10.1002/ajh.21311] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Abstract
The D-dimer antigen is a unique marker of fibrin degradation that is formed by the sequential action of 3 enzymes: thrombin, factor XIIIa, and plasmin. First, thrombin cleaves fibrinogen producing fibrin monomers, which polymerize and serve as a template for factor XIIIa and plasmin formation. Second, thrombin activates plasma factor XIII bound to fibrin polymers to produce the active transglutaminase, factor XIIIa. Factor XIIIa catalyzes the formation of covalent bonds between D-domains in the polymerized fibrin. Finally, plasmin degrades the crosslinked fibrin to release fibrin degradation products and expose the D-dimer antigen. D-dimer antigen can exist on fibrin degradation products derived from soluble fibrin before its incorporation into a fibrin gel, or after the fibrin clot has been degraded by plasmin. The clinical utility of D-dimer measurement has been established in some scenarios, most notably for the exclusion of VTE. This article consists of 2 sections: in the first, the dynamics of D-dimer antigen formation is discussed and an overview of commercially available D-dimer assays is provided. The second section reviews available evidence for the clinical utilization of D-dimer antigen measurement in VTE, as well as emerging areas of D-dimer utilization as a marker of coagulation activation in other clinical settings.
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Tick LW, Nijkeuter M, Kramer MHH, Hovens MMC, Büller HR, Leebeek FWG, Huisman MV. High D-dimer levels increase the likelihood of pulmonary embolism. J Intern Med 2008; 264:195-200. [PMID: 18452520 DOI: 10.1111/j.1365-2796.2008.01972.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Objective. To determine the utility of high quantitative D-dimer levels in the diagnosis of pulmonary embolism. Methods. D-dimer testing was performed in consecutive patients with suspected pulmonary embolism. We included patients with suspected pulmonary embolism with a high risk for venous thromboembolism, i.e. hospitalized patients, patients older than 80 years, with malignancy or previous surgery. Presence of pulmonary embolism was based on a diagnostic management strategy using a clinical decision rule (CDR), D-dimer testing and computed tomography. Results. A total of 1515 patients were included with an overall pulmonary embolism prevalence of 21%. The pulmonary embolism prevalence was strongly associated with the height of the D-dimer level, and increased fourfold with D-dimer levels greater than 4000 ng mL(-1) compared to levels between 500 and 1000 ng mL(-1). Patients with D-dimer levels higher than 2000 ng mL(-1) and an unlikely CDR had a pulmonary embolism prevalence of 36%. This prevalence is comparable to the pulmonary embolism likely CDR group. When D-dimer levels were above 4000 ng mL(-1), the observed pulmonary embolism prevalence was very high, independent of CDR score. Conclusion. Strongly elevated D-dimer levels substantially increase the likelihood of pulmonary embolism. Whether this should translate into more intensive diagnostic and therapeutic measures in patients with high D-dimer levels irrespective of CDR remains to be studied.
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Affiliation(s)
- L W Tick
- Department of Internal Medicine, Meander Medical Center, Amersfoort, The Netherlands.
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Merli GJ. Pathophysiology of Venous Thrombosis and the Diagnosis of Deep Vein Thrombosis–Pulmonary Embolism in the Elderly. Cardiol Clin 2008; 26:203-19, vi. [DOI: 10.1016/j.ccl.2007.12.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Abstract
Venous thromboembolic disease is a common disease associated with significant morbidity and mortality. Accurate and timely diagnosis should be guided by the use of validated clinical prediction rules. The mainstay of therapy is anticoagulation, although alternative approaches, such as use of concurrent thrombolysis or placement of vena caval filters, may be appropriate in selected patients. Determination of duration of anticoagulation requires a detailed assessment of the risk factors associated with the event allowing estimation of recurrence risk, and careful assessment of bleeding risk. Although extremely effective, anticoagulants have a narrow therapeutic window; systems should be in place to reduce risk of adverse events associated with these agents.
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Affiliation(s)
- Tracy Minichiello
- Division of Hospital Medicine, Department of Medicine, University of California, San Francisco, CA 94143, USA.
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Ghys T, Achtergael W, Verschraegen I, Leus B, Jochmans K. Diagnostic accuracy of the Triage® D-dimer test for exclusion of venous thromboembolism in outpatients. Thromb Res 2008; 121:735-41. [PMID: 17888501 DOI: 10.1016/j.thromres.2007.07.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2007] [Revised: 07/05/2007] [Accepted: 07/13/2007] [Indexed: 11/25/2022]
Abstract
BACKGROUND We evaluated the diagnostic performance of the Triage D-dimer test, a new fast quantitative point-of-care whole blood D-dimer assay and compared it with the Vidas D-dimer assay. MATERIALS AND METHODS The study population comprised 319 outpatients for whom D-dimer testing was requested in order to rule out venous thromboembolism (VTE). Routine testing consisted of a plasma ELISA D-dimer analysis (Vidas). For all included patients, an additional EDTA whole blood D-dimer test (Triage) was performed. Patients were classified by reference imaging or by follow-up of the medical record. Accuracy indices, receiver operating characteristics and the kappa coefficient for agreement were calculated using the cutoff values recommended by the manufacturer. RESULTS Prevalence of VTE was 14%. Sensitivity and specificity for VTE were 98% (95%CI: 88-100) and 34% (95%CI: 28-40) for Vidas and 91% (95%CI: 78-97) and 42% (95%CI: 36-48) for Triage, respectively. The differences in sensitivity and specificity between both D-dimer assays were statistically significant (McNemar, p<0.0001). ROC-curve analysis yielded an area under the curve of 0.83 (95%CI: 0.76-0.89) for the Vidas and 0.81 (95%CI: 0.74-0.88) for the Triage (p=0.396). The kappa coefficient for agreement between Vidas and Triage was 0.75 (95%CI: 0.68-0.79). CONCLUSIONS The Triage and Vidas D-dimer tests show comparable diagnostic accuracy. Vidas showed a significant higher sensitivity. Our findings strongly suggest lowering the cutoff for the Triage D-dimer test from 400 to 350 ng/mL. In this way specificity lowers from 42 to 38%, but, more importantly, sensitivity increases from 91 to 95%.
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Affiliation(s)
- Timothy Ghys
- Department of Hematology, Universitair Ziekenhuis Brussel, Laarbeeklaan 101, B-1090 Brussels, Belgium.
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Castelli R, Bergamaschini L, Sailis P, Pantaleo G, Porro F. The impact of an aging population on the diagnosis of pulmonary embolism: comparison of young and elderly patients. Clin Appl Thromb Hemost 2007; 15:65-72. [PMID: 18160565 DOI: 10.1177/1076029607308860] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
The influence of age on predisposing factors, diagnostic tests, and clinical presentation of pulmonary embolism was evaluated in 582 subjects with suspected pulmonary embolism (180 aged <65 years; 402 aged > or =65 years) consecutively enrolled at the Emergency Department. Pulmonary embolism was confirmed in 40% of patients, 75% of those were aged >65 years. Age was directly related to the diagnosis, and the observed probability was higher than the expected probability in the 70 to 79 year subgroup. Score at the Cumulative Illness Rating Scale significantly increased as a function of both age and pulmonary embolism. Dyspnea, syncope, jugular distension, and history of previous venous thromboembolism were more frequently observed in elderly patients. In-hospital mortality rate among the elderly and younger patients was 2% and 0.2%, respectively. The authors conclude that age > or =65 years and high comorbidity are risk factors for pulmonary embolism.
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Affiliation(s)
- Robert Castelli
- Department of Internal Medicine and Medical Specialties, Internal Medicine Unit. Milano MI, Italy.
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Yamaki T, Nozaki M, Sakurai H, Takeuchi M, Soejima K, Kono T. Uses of different D-dimer levels can reduce the need for venous duplex scanning to rule out deep vein thrombosis in patients with symptomatic pulmonary embolism. J Vasc Surg 2007; 46:526-32. [PMID: 17826240 DOI: 10.1016/j.jvs.2007.05.026] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2007] [Accepted: 05/04/2007] [Indexed: 11/25/2022]
Abstract
OBJECTIVE This study investigated the prevalence and distribution of deep vein thrombosis (DVT) in patients with symptomatic pulmonary embolism (PE) to establish a screening protocol to reduce unnecessary venous duplex scanning using different D-dimer level rather than single cutoff point of 0.5 microg/mL in patients with low and moderate pretest clinical probability (PTP). METHODS The PTP score and D-dimer testing were used to evaluate 85 consecutive patients with symptomatically proven PE before venous duplex scanning. After calculating the PTP score, patients were divided into low (<or=0 points), moderate (1 to 2 points), and high (>or=3 points) PTP groups. The receiver operating characteristic (ROC) curves analysis was used to determine the appropriate D-dimer cutoff point in low and moderate PTP, with a negative predictive value of >98%. RESULTS The study enrolled 81 patients. The prevalence of DVT was 63%, with 27 patients (33%) classified as low, 38 (47%) as moderate, and 16 (20%) as high PTP. DVT was detected in nine patients (33%) in the low PTP group, in 27 (71%) in the moderate group, and in 15 (94%) in the high group. In the low PTP patients, the difference in the value of D-dimer assay between positive-scan and negative-scan patients was statistically significant (9.99 +/- 7.33 vs 3.46 +/- 4.20, respectively; P = .008). Conversely, no significant difference in the D-dimer assay value between positive and negative scan results was found in the moderate PTP patients. ROC curves analysis were used to select D-dimer cutoff points of 2.0 microg/mL for the low PTP group and 0.7 microg/mL for the moderate PTP groups. For both groups, D-dimer testing provided 100% sensitivity and 100% negative predictive value in the diagnosis of DVT. In the low PTP group, specificity increased from 33% to 67% (P = .046). In the moderate PTP group, however, the determined D-dimer level did not improve the specificity. Overall, venous duplex scanning could have been reduced by 17% (14/81) by using different D-dimer cutoff points. CONCLUSIONS A combination of specific D-dimer level and clinical probability score is most effective in the low PTP patients in excluding DVT. In the moderate PTP group, however, the recommended cutoff point of 0.5 microg/mL may be preferable. These results show that a different D-dimer level is more useful than single cutoff point of 0.5 microg/mL in excluding DVT in established PE patients.
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Affiliation(s)
- Takashi Yamaki
- Department of Plastic and Reconstructive Surgery, Tokyo Women's Medical University, Tokyo, Japan.
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