Appropriateness of diagnostic strategies for evaluating suspected venous thromboembolism

2007 ◽  
Vol 97 (02) ◽  
pp. 195-201 ◽  
Author(s):  
Thomas Arnason ◽  
Philip Wells ◽  
Alan Forster
Keyword(s):  
Emergency Department ◽  
Tertiary Care ◽  
Diagnostic Testing ◽  
Care Hospital ◽  
Testing Strategy ◽  
Diagnostic Strategies ◽  
Vein Thrombosis ◽  
Clinical Probability ◽  
Imaging Results ◽  
D Dimer

SummaryIt was the objective of this study to determine the proportion of patients who undergo an appropriate diagnostic work-up following a D-dimer test performed to evaluate suspected pulmonary embolism (PE) or deep vein thrombosis (DVT). We performed a retrospective cohort study at a tertiary care hospital. We included patients if they underwent D-dimer testing between 2002 and 2005, if the D-dimer was performed for evaluation of VTE, and if the D-dimer test was successful. We classified: the patients’ clinical probability of DVT or PE according to theWells models,the imaging results,and the appropriateness of the testing algorithm. Of 1,000 randomly selected patients, 863 met our study criteria. Seven hundred nineteen patients (83%) had testing during an emergency department visit, while 144 were tested as inpatients (17%). Physicians performed the D-dimer test to evaluate DVT and PE in 238 (28%) and 625 (72%) patients, respectively. Overall, the testing strategy was appropriate in 69% (95% confidence interval [CI]: 66%–72%) of cases. The testing strategy was more likely to be appropriate for emergency department versus inpatients (75% vs. 39%, p < 0.05) and for DVT versus PE patients (84% vs. 63%, p < 0.05). Of all inappropriately tested patients, under-utilization of diagnostic imaging was more common than over-utilization (90% vs. 10%, p < 0.05). VTE was confirmed in 37 of 138 ‘DVT patients’ and 35 of 625 ‘PE patients’ (16% [95% CI: 11%–21%] and 6% [95% CI: 4%–8%], respectively). In conclusion, physicians often fail to use diagnostic testing strategies for VTE correctly following a D-dimer test.

Accuracy and usefulness of a clinical prediction rule and D-dimer testing in excluding deep vein thrombosis (DVT) in cancer patients

2007 ◽  
Vol 25 (18_suppl) ◽  
pp. 19522-19522
Author(s):  
M. Carrier ◽  
A. Lee ◽  
S. Bates ◽  
P. S. Wells
Keyword(s):  
Cancer Patients ◽  
Diagnostic Testing ◽  
Prediction Rule ◽  
Clinical Prediction Rule ◽  
Clinical Prediction ◽  
Probability Score ◽  
Vein Thrombosis ◽  
Clinical Probability ◽  
Low Probability ◽  
D Dimer

19522 Background: Cancer patients frequently present with thrombotic complications and rapid, accurate diagnostic testing would reduce morbidity and mortality. Although the combination of a low clinical probability using clinical prediction rules (e.g. Well’s Score) and a negative D-dimer result have proven to be safe and reliable in ruling out DVT in the general population, the accuracy of such a strategy is less certain in cancer patients. Because cancer patients often have alternative reasons for leg swelling and pain, and because malignancy and chemotherapy can render the D-dimer test positive in the absence of DVT, we hypothesize that the Well’s Score and D-dimer testing are potentially less accurate and less useful in excluding DVT in patients with active cancer. Methods: We performed a retrospective analysis of 2 prospective studies to compare the diagnostic test characteristics of the Well’s Score and D-dimer testing between patients with and without cancer presenting with suspected DVT. Results: A total of 1630 patients were studied; 107 had cancer. DVT was confirmed in 39.3% of patients with and 13.7% of patients without cancer. In both patient groups, the proportions of patients with DVT were significantly different among the high-, moderate- and low-probability groups according to the Well’s score (P<0.001). However, significantly fewer cancer patients (19.6%) had a low-probability score compared to patients without cancer (47.5%) (P<0.001). Similarly, 36.4% of cancer vs. 60.4% of noncancer patients had a negative D-dimer result (P<0.001). In cancer patients, a low probability score alone had a sensitivity of 95.2% (95%CI 82.6%-99.2%) and a specificity of 29.2% (95% CI 18.9%-42.0%). In combination with D-dimer testing, the sensitivity improved to 100% (95%CI 31.0%-100%) but the specificity was reduced to 26.4% (95%CI 13.5%-44.7%). In contrast, the specificity in patients without cancer was preserved at 53.9% (95%CI 50.4%-57.3%). Conclusion: DVT can be ruled out in cancer patients with a low clinical probability of DVT and a negative D-dimer result. However, the low specificity of these tests excludes very few patients and thereby limits their clinical usefulness. No significant financial relationships to disclose.

scholarly journals Combination pretest probability assessment and D-dimer did not reduce outpatient imaging for venous thromboembolism in a tertiary care hospital emergency department

CJEM ◽  
2014 ◽  
Vol 16 (01) ◽  
pp. 53-62 ◽  
Author(s):  
Sarah Ingber ◽  
Rita Selby ◽  
Jacques Lee ◽  
William Geerts ◽  
Elena Brnjac
Keyword(s):  
Emergency Department ◽  
Venous Thromboembolism ◽  
False Positive Rate ◽  
Tertiary Care ◽  
Real Life ◽  
Pretest Probability ◽  
Care Hospital ◽  
Ed Visits ◽  
The Impact ◽  
D Dimer

ABSTRACTIntroduction:Venous thromboembolism (VTE) is difficult to diagnose yet potentially life threatening. A low-risk pretest probability (PTP) assessment combined with a negative Ddimer can rule out VTE in two-thirds of outpatients, reducing the need for imaging. Real-life implementation of this strategy is associated with several challenges.Methods:We evaluated the impact of introducing a standardized diagnostic algorithm including a mandatory PTP assessment and D-dimer on radiologic test use for VTE in our emergency department (ED). A retrospective review of all ED visits for suspected VTE in the year prior to and following the introduction of this algorithm was conducted. VTE diagnosis was based on imaging. Guideline compliance was also assessed.Results:ED visits were investigated for suspected VTE in the pre- and postintervention periods (n 5 1,785). Most D-dimers (95%) ordered were associated with a PTP assessment, and 50% of visits assigned a low PTP had a negative D-dimer. The proportion of imaging tests ordered for VTE in all ED visits was unchanged postintervention (1.9% v. 2.0%). The proportion of patients with suspected VTE in whom VTE was confirmed on imaging decreased postintervention (10.2% v. 14.1%).Conclusion:In spite of excellent compliance with our algorithm, we were unable to reduce imaging for VTE. This may be due to a lower threshold for suspecting VTE and an increase in investigation for VTE combined with a high false positive rate of our D-dimer assay in low–pretest probability patients. This study highlights two common real-life challenges with adopting this strategy for VTE investigation.

Diagnostic accuracy of the D-dimer in children

2017 ◽  
Vol 103 (9) ◽  
pp. 832-834 ◽  
Author(s):  
Jessica Kanis ◽  
Cassandra L Hall ◽  
Jonathan Pike ◽  
Jeffrey A Kline
Keyword(s):  
Diagnostic Accuracy ◽  
Chart Review ◽  
Characteristic Curve ◽  
Laboratory Data ◽  
Hospital System ◽  
Vein Thrombosis ◽  
Clinical Probability ◽  
Imaging Results ◽  
Deep Vein ◽  
D Dimer

BackgroundWe sought to measure the diagnostic accuracy of D-dimer in children with suspected pulmonary embolism (PE).MethodsWe queried our electronic medical record for quantitative D-dimer values obtained in all children ages 5–17 over 10 years in our 10-hospital system. Patients who had a D-dimer obtained in the evaluation of PE underwent supervised chart review to extract baseline demographics (age, sex, ethnicity), medical history, laboratory data and imaging results. PE was confirmed by imaging positive for deep vein thrombosis (DVT) or PE and excluded by imaging or no DVT or PE diagnosis within 90 days.ResultsOver a 10-year period, we identified 13 792 orders for D-dimer testing in 2554 unique patients. Chart review indicated that 526 (20.6%) unique patients had D-dimer testing performed in the evaluation of PE (Cohen’s kappa=0.95, 95% CI 0.85 to 1.0). Most D-dimers (465/526, 88%) were ordered in children aged >12 years. Of these 526 children, 34 (6.4%, 95% CI) had a criterion standard positive for new or recurrent PE. The mean D-dimer value was 2104±1394 ng/mL in the 34/34 PE+ children and 586±962 ng/mL in PE− children with a sensitivity of 34/34 (100%, 89% to 100%) and a specificity of 290/492 (58%, 54% to 63%). The area under the receiver operating characteristic curve was 0.90 ((0.9)87–0.94).ConclusionsD-dimer is currently ordered in children for suspected PE in the emergency care setting, mostly in teenagers. The observed lower limit 95% CIs of 89% and 54% for diagnostic sensitivity and the specificity, respectively, suggest if used in patients with low-clinical probability, a normal D-dimer can safely exclude PE in children.

Rapid D-dimer test combined a clinical model for deep vein thrombosis

2004 ◽  
Vol 91 (06) ◽  
pp. 1237-1246 ◽  
Author(s):  
Alfonsa Friera ◽  
Pilar Artieda ◽  
Paloma Caballero ◽  
Pilar Moliní ◽  
Marta Morales ◽  
...  
Keyword(s):  
Emergency Department ◽  
Diagnostic Strategy ◽  
Thromboembolic Complications ◽  
Clinical Model ◽  
Vein Thrombosis ◽  
Clinical Probability ◽  
Venous Thromboembolic ◽  
Deep Vein ◽  
Test Probability ◽  
D Dimer

SummaryAn optimal approach to the diagnosis of deep vein thrombosis (DVT) in lower limbs in the emergency department is still unknown. In this prospective cohort study, we aimed to evaluate the accuracy of the widely available plasma D-dimer test (VIDAS) and establish the usefulness of combining D-dimer testing with a clinical model to reduce the need for serial ultrasonographies and improve the diagnostic strategy of DVT. We performed a cohort study in 383 consecutive outpatients referred to the emergency department of Hospital La Princesa, with clinical suspicion of DVT. The patients were stratified into three pre-test probability categories using an explicit clinical model (Wells score), and underwent a quantitative automated ELISA D-dimer assay (VIDAS D-Dimer® bioMérieux). Patients were managed according to the diagnostic strategy based on clinical probability and compression ultrasonography (CU). Patients for whom DVT was considered a high pre-test probability with negative ultrasonographic findings in the initial CU, returned the following week for repeat ultrasonography. All patients with DVT excluded did not receive anticoagulant therapy, and were followed up for three months to monitor the development of venous thromboembolic complications. DVT was confirmed in 102 patients (26.6%): 95 in the initial test, four in the second test, and three who developed venous thromboembolic complications in the three-month follow-up period. The calculated D-dimer cut-off level was 1 µg/ml. One hundred patients (98%) with DVT had positive D-dimer. D-dimer had a sensitivity of 98% and a negative predictive value of 98.6%. Among the high-probability patients with positive D-dimer tests and initial negative CU, 9.75% had DVT on repeat CU at one week. The study results suggest that the addition of VIDAS D-dimer to this diagnostic algorithm could improve the management of patients with suspected DVT in daily practice. A diagnostic approach of DVT based on D-dimer (cut-off ≥1 μg/ml) as the first diagnostic tool for the exclusion of DVT, and the clinical probability model as the tool that identifies those patients requiring a second ultrasonography is useful and suitable for daily medical practice.

scholarly journals Reducing ultrasound in diagnosing deep vein thrombosis by using clinical scores and D-dimer testing

2020 ◽  
Vol 7 (2) ◽  
pp. 332
Author(s):  
Nehad Abdou Zaid ◽  
Mahmoud S. El Desoky ◽  
Seham F. Attia
Keyword(s):  
Emergency Department ◽  
University Hospital ◽  
Group 13 ◽  
Vein Thrombosis ◽  
Clinical Probability ◽  
Wells Score ◽  
The Mean ◽  
Deep Vein ◽  
Work Up ◽  
D Dimer

Background: To reduce unnecessary venous ultrasound examination in cases suspected to have deep venous thrombosis (DVT) in emergency department by using D dimer and wells score. venous duplex is widely used to diagnose DVT increasing burden on ultrasound in overcrowded emergency department. Authors can decrease this burden by using clinical probability scores and D dimer.Methods: This is prospective study done on 50 consecutive patients suspected to have DVT represented to emergency department of   Menoufia University Hospital during the period from June 2018 to June 2019. Full history, physical examination, assessment of clinical probability score, d dimer level and results of venous duplex collection.Results: According to wells score, the majority of cases diagnosed as DVT were of high probability group 13(68.4%), 5 patients with moderate probability and only one patient with low probability was diagnosed as DVT. The mean of D dimer level in cases diagnosed as DVT is (4173.6±2173.1) and in cases without DVT is (927.4±1064.6). Using wells score and D dimer together, sensitivity is 100%, Specificity is 94%. PPV is 90%, and NPV is 100% in predicting DVT. All cases with negative d dimer and low risk probability do not have DVT.Conclusions: Based on this result, using wells score and d dimer level in early work up of patients suspected to have DVT will decrease overusing and cost of venous duplex.

scholarly journals Effective Utilization of Limited Isolation Rooms to Provide Safe Patient Care and Staff Safety in a Low- and Middle-Income Country

2020 ◽  
Vol 41 (S1) ◽  
pp. s203-s204
Author(s):  
Rozina Roshanali
Keyword(s):  
Emergency Department ◽  
Tertiary Care ◽  
Limited Resource ◽  
Multidrug Resistant ◽  
Communicable Diseases ◽  
Care Hospital ◽  
Middle Income ◽  
Safe Patient Care ◽  
Bed Management ◽  
Resource Setting

Background: My tertiary-care hospital is a 750-bed hospital with only 17 airborne infection isolation room (AIIR) and negative-pressure rooms to isolate patients who have been diagnosed or are suspected with prevalent diseases like tuberculosis, measles, and chickenpox. On the other hand, only 14 single-patient isolation rooms are available to isolate patients with multidrug-resistant organisms (MDROs) such as CRE (carbapenum-resistant Enterobacter) or colistin-resistant MDROs. Due to the limited number of isolation rooms, the average number of hours to isolate infected patients was ~20 hours, which ultimately directly placed healthcare workers (HCWs) at risk of exposure to infected patients. Methods: Plan-Do-Study-Act (PDSA) quality improvement methodology was utilized to decrease the average number of hours to isolate infected patients and to reduce the exposure of HCWs to communicable diseases. A detailed analysis were performed to identify root causes and their effects at multiple levels. A multidisciplinary team implemented several strategies: coordination with information and technology team to place isolation alerts in the charting system; screening flyers and questions at emergency department triage; close coordination with admission and bed management office; daily morning and evening rounds by infection preventionists in the emergency department; daily morning meeting with microbiology and bed management office to intervene immediately to isolate patients in a timely way; infection preventionist on-call system (24 hours per day, 7 days per week) to provide recommendations for patient placement and cohorting of infected patients wherever possible. Results: In 1 year, a significant reduction was achieved in the number of hours to isolate infected patients, from 20 hours to 4 hours. As a result, HCW exposures to communicable diseases also decreased from 6.7 to 1.5; HCW exposures to TB decreased from 6.0 to 1.9; exposures measles decreased from 4.75 to 1.5; and exposures chickenpox decreased from 7.3 to 1.0. Significant reductions in cost incurred by the organization for the employees who were exposed to these diseases for postexposure prophylaxis also decreased, from ~Rs. 290,000 (~US$3,000) to ~Rs. 59,520 (~US$600). Conclusions: This multidisciplinary approach achieved infection prevention improvements and enhanced patient and HCW safety in a limited-resource setting.Funding: NoneDisclosures: None

Performance of five D-dimer assays for the exclusion of symptomatic distal leg vein thrombosis

2012 ◽  
Vol 107 (02) ◽  
pp. 369-378 ◽  
Author(s):  
Jan Schwonberg ◽  
Carola Hecking ◽  
Marc Schindewolf ◽  
Dimitrios Zgouras ◽  
Susanne Lehmeyer ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Diagnostic Value ◽  
Vein Thrombosis ◽  
Clinical Probability ◽  
Wells Score ◽  
Deep Vein ◽  
Test Result ◽  
D Dimer ◽  
Rule Out ◽  
Compression Ultrasonography

SummaryThe diagnostic value of D-dimer (DD) in the exclusion of proximal deep-vein thrombosis (DVT) is well-established but is less well-known in the exclusion of distal (infrapopliteal) DVT. Therefore, we evaluated the diagnostic abilities of five DD assays (Vidas-DD, Liatest-DD, HemosIL-DD, HemosIL-DDHS, Innovance-DD) for excluding symptomatic proximal and distal leg DVT. A total of 243 outpatients whose symptoms were suggestive of DVT received complete compression ultrasonography (cCUS) of the symptomatic leg(s). The clinical probability of DVT (PTP) was assessed by Wells score. Thirty-eight proximal and 31 distal DVTs (17 tibial/fibular DVTs, 14 muscle DVTs) were diagnosed by cCUS. Although all assays showed high sensitivity for proximal DVT (range 97–100%), the sensitivity was poor for distal DVT (range 78–93%). None of the assays were individually able to rule out all DVTs as a stand-alone test (negative predictive value [NPV] 91–96%). However, a negative DD test result combined with a low PTP exhibited a NPV of 100% for all DVTs (including proximal, tibial/fibular, and muscle DVTs) with the HemosIL-DDHS and Innovance-DD. All proximal and tibial/fibular DVTs, but not all muscle DVTs, could be ruled out with this strategy using the Liatest-DD and Vidas-DD. The HemosIL-DD could not exclude distal leg DVT, even in combination with a low PTP. The combination of a negative DD with a low PTP showed a specificity of 32–35% for all DVTs. In conclusion, our study shows that when used in conjunction with a low PTP some DD assays are useful tools for the exclusion of distal leg DVT.

Abstract 14721: Impact of Covid-19 on Cardiology Consultation in Tertiary Care Hospital of a Developing Country

Circulation ◽  
2020 ◽  
Vol 142 (Suppl_3) ◽  
Author(s):  
ghufran adnan ◽  
Osman Faheem ◽  
Maria Khan ◽  
Pirbhat Shams ◽  
Jamshed Ali
Keyword(s):  
Emergency Department ◽  
Tertiary Care ◽  
Reduction Rate ◽  
Care Hospital ◽  
Chi Square ◽  
Coronary Syndrome ◽  
Significant Difference ◽  
Drastic Increase ◽  
Chi Square Test ◽  
The Difference

Introduction: COVID-19 pandemic has overwhelmed the healthcare system of Pakistan. There has been observation regarding changes in pattern of patient presentation to emergency department (ED) for all diseases particularly cardiovascular. The aim of the study is to investigate these changes in cardiology consultations and compare pre-COVID-19 and COVID-19 era. Hypothesis: There is a significant difference in cardiology consultations during COVID era as compared to non-COVID era. Method: We collected data retrospectively of consecutive patients who visited emergency department (ED) during March-April 2019 (non-COVID era) and March-April 2020 (COVID era). Comparison has been made to quantify the differences in clinical characteristics, locality, admission, type, number, and reason of Cardiology consults generated. Results: We calculated the difference of 1351 patients between COVID and non-COVID era in terms of cardiology consults generated from Emergency department, using Chi-square test. Out of which 880 (59%) are male with mean age of 61(SD=15). Analysis shows pronounced augmentation in number of comorbidities [Hypertension(6%), Chronic kidney disease (6%), Diabetes (5%)] but there was 36% drop in total cardiology consultations and 43% reduction rate in patient’s ED visit from other cities during COVID era. There was 60% decrease in acute coronary syndrome presentation in COVID era, but fortuitously drastic increase (30%) in type II myocardial injury has been noted. Conclusion: There is a remarkable decline observed in patients presenting with cardiac manifestations during COVID era. Lack in timely care could have a pernicious impact on outcomes, global health care organizations should issue directions to adopt telemedicine services in underprivileged areas to provide timely care to cardiac patients.

VALIDATION OF QUICK COVID SEVERITY INDEX IN COVID PATIENTS ADMITTED THROUGH EMERGENCY DEPARTMENT OF A PRIVATE TERTIARY CARE HOSPITAL IN WEST BENGAL, INDIA

2021 ◽  
pp. 53-55
Author(s):  
Harsimran Singh Das
Keyword(s):  
Emergency Department ◽  
Respiratory Failure ◽  
Tertiary Care Hospital ◽  
Clinical Status ◽  
Tertiary Care ◽  
Severity Index ◽  
Adult Patients ◽  
Care Hospital ◽  
Oxygen Requirement ◽  
Clinical Tool

Introduction:qCSI (Quick COVID severity index) is a clinical tool established recently post pandemic to predict respiratory failure within 24 hours of admission in COVID-19 patients; respiratory failure being explain as increased oxygen requirement greater than 6L/min by low ow device, high ow device, noninvasive or invasive ventilation to maintain spO2 of greater than or equal to 94%, or death. Aim:To verify and validate the application of the qCSI in Emergency Department in Indian demographic for evidence-based guidance to aid physician decision making in safely dispositioning adult patients with COVID-19 with oxygen requirement less than or equal to 6L/min via low ow devices including nasal cannula and oxygen mask Materials and methods:This is an observational, retrospective study from Emergency Department in a private tertiary care hospital of admitted adult patients with COVID-19 disease. Clinical parameters in qCSI and disposition of 210 patients admitted through Emergency Department included in this study selected randomly was sought on admission and clinical status with level of care 24 hours following admission was recorded and compared with prediction based on qCSI from a period of 1 May 2020 to 31 October 2020. Result:We found that19(9.0%) patients Initial qCSI Score was Low, 80(38.1%) patients Initial qCSI Score was Low-intermediate, 84(40.0%) patients Initial qCSI Score was High-intermediate and 27(12.9%)patients Initial qCSI Score was High.qCSI Score after 24 hours 16(11.4%) patients were Low, 43(30.7%) patients were Low-intermediate, 63(45.0%) patients was High-intermediate and 18(12.9%) patients was High.Out of 210(100.0%) patients, 70 (33.3%) patients were critically ill. Conclusion:In conclusion these data show that the quick COVID-19 Severity Index provides easily accessed risk stratication relevant to Emergency Department provider.

Impact of targeted bundles to reduce the nebulization time gap from prescription to administration among red triaged patients in emergency department: An quality improvement initiative

2021 ◽  
Author(s):  
Seema Sachdeva seema sachdeva ◽  
Akshay Kumar Akshay Kumar ◽  
Parveen Aggarwal Parveen Aggarwal
Keyword(s):  
Emergency Department ◽  
Tertiary Care ◽  
Signs And Symptoms ◽  
Fish Bone ◽  
Quality Improvement Initiative ◽  
Care Hospital ◽  
Analysis Model ◽  
Post Intervention ◽  
Targeted Interventions ◽  
Administration Time

Abstract BackgroundSevere exacerbation of asthma are potentially life-threatening and therefore require prompt care and frequent management. Important elements of early treatment includes recognition of early signs and symptoms of breathing difficulty and timely prescription and administration of therapeutic agents. A subsequent delay in receiving nebulization during an acute exacerbation of asthma can leads to cardiac arrest and even death. AimTo reduce the gap in administration of nebulization from its prescription time among red triaged patients by 50% from its baseline. Setting and designThis interventional study was conducted among red triaged patients in emergency department of tertiary care hospital, India . Material and MethodsBaseline information was collected during first 4 weeks to find gap in administration of nebulization from its prescription time. Fish bone analysis and process map were laid down to analyse the situation. The intervention using targeted bundles was done via 3 PDSA (PDSA1: indenting the nebulizers, PDSA 2: training of doctors and nurses, PDSA 3; introducing equipment checklist) to reduce the gap . A run chart using time series analysis model was used to compare the pre and post intervention nebulization gap. ResultsTotal 74 patients (30 in pre- intervention, 44 in post intervention) admitted in red triaged area were observed for nebulization gap from prescription to administration. Median time for nebulization gap before intervention was 46.5 minutes which reduced to 15 minutes in post intervention phase. ConclusionThis bundles of targeted interventions was successful to reduce the nebulization gap. Key words: nebulization gap, prescription time, administration time

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