scholarly journals Comparison of Diagnostic Accuracy of Tuberculosis Spondylitis between Genexpert and Histopathological Examination

2021 ◽  
Vol 53 (1) ◽  
Author(s):  
David Rudianto Salim ◽  
◽  
Ahmad Ramdan ◽  
Gibran Tristan Alpharian
Keyword(s):  
Diagnostic Accuracy ◽  
Predictive Value ◽  
Histopathological Examination ◽  
Waiting Times ◽  
Screening Method ◽  
High Sensitivity ◽  
Diagnostic Methods ◽  
High Yield ◽  
Negative Results ◽  
Rapid Tests

Tuberculosis is an infectious disease caused by Mycobacterium tuberculosis. Spinal TB is associated with poor functional outcomes. Histopathological examination requires a long waiting times to obtain the results thus impractical for screening and may delay diagnosis. GeneXpert offers rapid tests for prompt screening and diagnosis. This study aimed to assess the diagnostic accuracy of GeneXpert in patients with spinal TB when compared to the histopathology test as the gold standard. This study was performed on patients in the Spine Clinic of the Department of Orthopedic and Traumatology, Dr. Hasan Sadikin General Hospital Bandung who were diagnosed with spinal TB during the period of May 2019–May 2020. Blood samples were collected from the patients and tested using GeneXpert and histopathological assessment. Results demonstrated 34 patients with a positive result and 6 patients with negative results on both diagnostic methods. Twenty nine out of 40 patients (72.5%) had rifampin-sensitive TB. Diagnostic accuracy of GeneXpert, when compared to histopathological examination, is represented by the sensitivity of 88.2%, specificity of 33.3%, positive predictive value of 88.2%, and negative predictive value of 33.3%. High sensitivity results forpatients with spinal TB on GeneXpert suggests that the test is appropriate to be used as a screening method and as a high-yield rapid diagnostic test for patients suspected for spinal TB.

scholarly journals Diagnostic accuracy of QuickVue® Dipstick Strep A test and its effect on antibiotic prescribing in children in the United Arab Emirates

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Seyed Ali Safizadeh Shabestari ◽  
Zainab A. Malik ◽  
Fadil Y. A. Al-Najjar
Keyword(s):  
Diagnostic Accuracy ◽  
United Arab Emirates ◽  
Predictive Value ◽  
Resistant Bacteria ◽  
Antibiotic Prescribing ◽  
Upper Respiratory Tract ◽  
Sample Collection ◽  
Throat Culture ◽  
Negative Results ◽  
Tract Infections

Abstract Background Unnecessary antibiotic prescription to patients with upper respiratory tract infections (URTIs) has led to the increase in antibiotics resistant bacteria rates. In this study, we evaluated the diagnostic accuracy of QuickVue® Dipstick Strep A test (QV-SAT) in children presenting with acute pharyngotonsillitis and its effect on antibiotic prescribing. Methods A single-gated diagnostic accuracy study of children with fever, runny nose, and tonsillitis presenting to a paediatric clinic between March 2016 and September 2018. Paired throat swabs for QV-SAT and culture were collected. None of the children received antibiotics prior to sample collection. The sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of the test were calculated. Results Two hundred four children were included in this study. 111 (54.4%) were boys and 146 (71.6%) were under the age of 5 years. QV-SAT was positive in 44 (21.6%) and throat culture was positive for Group A β- haemolytic Streptococcus (GAS) in 42 (20.6%) of the children. The results of QV-SAT were highly consistent with culture results: only 2 (0.9%) children with negative results had a positive throat culture. The sensitivity of the QV-SAT in the identification of GAS infection was 100% (95% CI 91.6%, 100%) and the NPV was 100% (95% CI 99.9%, 100%). Only 42 children ( 20.6%) were given antibiotics, while 162 (79.4%) were not. Conclusion The QV-SAT is a quick and reliable test that can help dramatically reduce antibiotic prescriptions to children presenting with fever and acute pharyngotonsillitis.

The predictive value of videostroboscopy in the assessment of premalignant lesions and early glottis cancers

2017 ◽  
Vol 71 (4) ◽  
pp. 14-18 ◽  
Author(s):  
Anna Rzepakowska ◽  
Ewelina Sielska-Badurek ◽  
Ewa Osuch-Wójcikiewicz ◽  
Michał Sobol ◽  
Kazimierz Niemczyk
Keyword(s):  
Predictive Value ◽  
Vocal Fold ◽  
Histopathological Examination ◽  
High Sensitivity ◽  
Vocal Folds ◽  
Invasive Cancer ◽  
Premalignant Lesions ◽  
Good Tool ◽  
Malignant Lesions ◽  
Sensitivity Specificity

Objective: To assess the sensitivity and specificity of larngovideostroboscopy (LVS) in the diagnosis of precancerous and malignant lesions of the vocal folds. Material and methods: In 175 patients (128 men and 47 women), aged 19-88 years, mean age 61.5, who were admitted to the clinic with diagnosed premalignant conditions of vocal fold mucosa (leukoplakia, chronic hypertrophic inflammatory lesions) and thickening or tumor on the vocal fold, there was performed LVS before the laryngeal microsurgery. The LVS study included: localization of the leasion, movement of the vocal folds, mucosal wave, shape of glottis clousure, amplitude and symmetry of vocal fold vibration. In the evaluation, a point scale was applied for the individual functional parameters. The scale ranged from 0 to 14. Patients with impaired vocal fold motion or absent mucosal wave were positive on LVS for malignant lesions. Those with limitted mucosal wave were positive on LVS for dysplastic lesions. The results were compared with the final histopathological examination and the sensitivity, specificity, accuracy, positive (PPV) and negative (NPV) predictive value were calculated. Results: On the basis of histopathological examination, benign lesions (normal or inflammatory mucosa) accounted for 20% of diagnoses, hypertrophy and parakeratosis for 28%, low and middle grade dysplasia accounted for 10% and malignant lesions (high-grade dysplasia, pre-invasive cancer, Invasive cancer) was diagnosed in 42% of patients. The overall mean score for LVS was 4.5 and 8.0, respectively for benign and malignant lesions. Sensitivity, specificity, accuracy, PPV and NPV of LVS in detecting malignant lesions were respectively - 95.6%, 23.8%, 61.1%, 57.6% and 83.3% and in detecting both premalignant and malignant lesions were respectively – 90.7%, 31.4%, 78.9%, 84.1% and 45.8%. Conclusions: Because of the high sensitivity of LVS in detecting precancerous and malignant lesions, this method is a very good tool for screening of pathology within the larynx.

scholarly journals The Clinical Utility of the Heparin Neutralization Assay in the Diagnosis of Heparin-Induced Thrombocytopenia

2017 ◽  
Vol 24 (5) ◽  
pp. 749-754 ◽  
Author(s):  
Gang Zheng ◽  
Michael B. Streiff ◽  
Clifford M. Takemoto ◽  
Jennifer Bynum ◽  
Elise Gelwan ◽  
...  
Keyword(s):  
Diagnostic Accuracy ◽  
Predictive Value ◽  
Clinical Utility ◽  
Predictive Accuracy ◽  
High Sensitivity ◽  
Neutralization Assay ◽  
Serotonin Release ◽  
Enzyme Linked Immunosorbent Assay ◽  
Heparin Induced Thrombocytopenia ◽  
Heparin Neutralization

Heparin-induced thrombocytopenia (HIT) remains diagnostically challenging. Immunoassays including PF4/heparin enzyme-linked immunosorbent assay (ELISA) have high sensitivity but low specificity. Whether the heparin neutralization assay (HNA) improves the diagnostic accuracy of the PF4/heparin ELISA for HIT is uncertain. In this study, to assess its clinical utility and evaluate whether it improves the diagnostic accuracy for HIT, we implemented HNA in conjunction with PF4/heparin ELISA over a 1-year period. A total of 1194 patient samples were submitted to the laboratory for testing from December 2015 to November 2016. Heparin neutralization assay alone is a poor predictor for HIT, but it has high negative predictive value (NPV): Cases with %inhibition <70% are always negative for serotonin release assay. It improves the diagnostic positive predictive value (PPV) of ELISA without compromising sensitivity: ELISA optical density (OD) ≥1.4 alone has a sensitivity of 88% (14/16) and a PPV of 61% (14/23); with HNA %inhibition ≥70%, the sensitivity remains 88% (14/16) and PPV is 82% (14/17). 4Ts score correlates with ELISA OD and predicts HIT; the predictive accuracy of 4Ts score is further improved by HNA. Interestingly, HNA %inhibition of <70% correlates with low 4Ts scores. Based on its high NPV, HNA has the potential to facilitate more timely and accurate HIT diagnosis.

scholarly journals Evaluation of endometrial causes of postmenopausal bleeding with it's correlation with endometrial thickness and hysteroscopy findings and endometrial tissue histopathology

2020 ◽  
Vol 9 (7) ◽  
pp. 2940
Author(s):  
Saurabh V. Bhangale ◽  
Shailja Sharma ◽  
Asmita Patil ◽  
Beena Kumari
Keyword(s):  
Diagnostic Accuracy ◽  
Endometrial Carcinoma ◽  
Predictive Value ◽  
Histopathological Examination ◽  
Endometrial Thickness ◽  
Endometrial Tissue ◽  
Transvaginal Sonography ◽  
Histopathological Diagnosis ◽  
Postmenopausal Bleeding ◽  
Dilation And Curettage

Background: Postmenopausal bleeding (PMB)accounts for 5% of gynecology visit. All with unexpected uterine bleeding should be evaluated for endometrial carcinoma since this potentially lethal disease is the cause of bleeding in approximately 10 percent patients (range 1 to 25 percent, depending upon risk factors). The aim of the study was to evaluate endometrial causes of postmenopausal bleeding (PMB) with it's correlation with endometrial thickness (ET)and hysteroscopy findings and endometrial tissue histopathology.Methods: A total 50 consecutive cases of PMB fulfilling the inclusion and exclusion criteria and giving informed consent were selected. Each patient was subjected to transvaginal sonography (TVS) in which uterus, adnexa and endometrial thickness (ET) was assessed. Then hysteroscopy and/or dilation and curettage was scheduled at subsequent visit. Endometrial sample was sent for histopathological examination. Sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV) and diagnostic accuracy was calculated for ET by TVS and hysteroscopy findings, considering histopathological diagnosis as the gold standard.Results: Most common endometrial cause of PMB was atrophic endometrium (44%). The other causes were endometrial carcinoma (18%), endometrial hyperplasia (18%), endometrial polyp (12%), endometritis (4%), and leiomyoma (4%). The diagnostic accuracy of ET by TVS at a cut-off point of 5 mm was 94% with sensitivity 89.3%, specificity 100%, PPV 100% and NPV 88%. The diagnostic accuracy of hysteroscopy was 98% with sensitivity 96.4%, specificity 100%, PPV 100% and NPV 95.7%.Conclusions: Being relatively cheap, easily accessible, non-invasive, TVS with ET measurement should first line investigation in the evaluation of women with postmenopausal bleeding with suspected endometrial pathology. Although hysteroscopy is more specific and sensitive, in poor resource settings it should be limited to cases with ill-defined endometrial lining, recurrent/ persistent bleeding and cases with endometrial thickness greater than 5 mm irrespective of endometrial echotexture.

scholarly journals High diagnostic accuracy of automated rapid Strep A test reduces antibiotic prescriptions for children in the United Arab Emirates

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Salama Bin Hendi ◽  
Zainab A. Malik ◽  
Amar Hassan Khamis ◽  
Fadil Y. A. Al-Najjar
Keyword(s):  
Diagnostic Accuracy ◽  
United Arab Emirates ◽  
Predictive Value ◽  
High Sensitivity ◽  
Signs And Symptoms ◽  
Throat Culture ◽  
Clinical Criteria ◽  
Variable Sensitivity ◽  
High Level ◽  
Sensitivity Specificity

Abstract Background Diagnosis of Group A Streptococcus (GAS) pharyngitis in children is hindered by variable sensitivity of clinical criteria and rapid Strep A tests (SAT), resulting in reliance on throat cultures as the gold standard for diagnosis. Delays while awaiting culture reports result in unnecessary antibiotic prescriptions among children, contributing to the spread of antimicrobial resistance (AMR). Methods Diagnostic accuracy study of an automated SAT (A-SAT) in children up to 16 years of age presenting to an emergency room with signs and symptoms of pharyngitis between March and June 2019. Paired throat swabs for A-SAT and culture were collected. Sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) for A-SAT were calculated. Results Two hundred and ninety-one children were included in this study. 168 (57.7%) were boys and the mean age was 4.2 years. A-SAT was positive in 94 (32.3%) and throat culture was positive in 90 (30.9%) children. A-SAT and throat culture results showed a high level of consistency in our cohort. Only 6 (2%) children had inconsistent results, demonstrating that the A-SAT has a high sensitivity (98.9%), specificity (97.5%), PPV (94.7%) and NPV (99.5%) for the diagnosis of GAS pharyngitis in children. Only 92 (32%) children were prescribed antibiotics while the vast majority (68%) were not. Conclusions A-SAT is a quick and reliable test with diagnostic accuracy comparable to throat culture. Its widespread clinical use can help limit antibiotic prescriptions to children presenting with pharyngitis, thus limiting the spread of AMR.

scholarly journals Assessment of the IgA Immunoassay Diagnostic Potential of the Mycobacterium tuberculosis MT10.3-MPT64 Fusion Protein in Tuberculous Pleural Fluid

2010 ◽  
Vol 17 (12) ◽  
pp. 1963-1969 ◽  
Author(s):  
Leonardo Silva Araujo ◽  
Renata Maciel Moraes ◽  
Anete Trajman ◽  
Maria Helena Féres Saad
Keyword(s):  
Pleural Fluid ◽  
Histopathological Examination ◽  
False Negative ◽  
High Sensitivity ◽  
Enzyme Linked Immunosorbent Assay ◽  
Negative Results ◽  
Diagnostic Potential ◽  
False Negative Results ◽  
Sds Page ◽  
Increased Sensitivity

ABSTRACT Pleural tuberculosis (PL-TB) remains difficult to diagnose. An enzyme-linked immunosorbent assay (ELISA) was developed based on a construction containing the fusion of the Rv3019c (MT10.3) and Rv1980c (MPT64) gene sequences, and its performance was evaluated in an area where TB is endemic. A total of 92 pleural fluid (PF) samples at serial dilutions of 1:50 to 1:800 were included in the ELISA IgA MT10.3-MPT64 evaluation: 70 from TB patients and 22 from patients with other pleurisies. Confirmation of the expression and subsequent purification of the protein was made by SDS-PAGE and Western blot assays, resulting in a 36-kDa protein. ELISA IgA MT10.3-MPT64 showed sensitivities of 61.4%, 58.6%, 62.9%, 67.1%, and 70% at each PF dilution, respectively. The cumulative results of all dilutions increased sensitivity to 81.4% without jeopardizing specificity. Similar results were also obtained at the combined dilutions of 1:50, 1:200, and 1:800 or 1:50 plus 1:800 dilutions (80%). The overall sensitivity of the reference test, i.e., histopathological examination, was 74%. But, via the ELISA IgA MT10.3-MPT64 test, sensitivity was high for specimens with a negative culture (23/27; 85.2%) or nonspecific histopathology (17/18; 94.4%). Our findings demonstrated the promising use of this test as an adjunct in PL-TB diagnoses, particularly in cases with lower bacterial loads and false-negative results in the reference tests, since the new test includes such important features as quick and easy application, high sensitivity and, perhaps most importantly, affordability, which is so crucial for its widespread use in developing countries.

scholarly journals Diagnostic accuracy of multiplex polymerase chain reaction on tissue biopsies in periprosthetic joint infections

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Igor Lazic ◽  
Susanne Feihl ◽  
Peter M. Prodinger ◽  
Ingo J. Banke ◽  
Andrej Trampuz ◽  
...  
Keyword(s):  
Diagnostic Accuracy ◽  
Multiplex Pcr ◽  
Predictive Value ◽  
Joint Infection ◽  
False Negative ◽  
Revision Arthroplasty ◽  
Pathogen Identification ◽  
Negative Results ◽  
Joint Infections ◽  
Pcr Assays

AbstractThe diagnosis and treatment of periprosthetic joint infection (PJI) currently relies on cultures, which are time-consuming and often fail. Multiplex PCR assays promise reliable and prompt results, but have been heterogeneously evaluated. In this study, we analyse multiplex PCR in pathogen identification using only tissue biopsies. 42 patients after revision arthroplasty of the hip or knee were evaluated using multiplex PCR to identify microorganisms. The patients were classified according to the diagnostic criteria published by Zimmerli et al. and the results were compared to the respective microbiological cultures. PJI was detected in 15 patients and 27 revisions were aseptic. The multiplex PCR of tissue biopsies had a sensitivity of 0.3 (95% CI 0.12–0.62), a specificity of 1.0 (0.87–1.0), a positive predictive value of 1.0 (0.48–1.0) and a negative predictive value of 0.73 (0.56–0.86). The diagnostic accuracy of multiplex PCR on tissue biopsy samples is low in comparison to routine microbiological cultures. The evaluation of tissue biopsies using multiplex PCR was prone to false negative results. However, multiplex PCR assays have the advantage of rapid pathogen identification. We therefore recommend further investigation of multiplex PCR in the setting of suspected PJI with a careful choice of specimens.

Biomarkers in acute coronary syndromes

2021 ◽  
pp. 400-408
Author(s):  
Jasper Boeddinghaus ◽  
Thomas Nestelberger ◽  
Raphael Twerenbold ◽  
Christian Mueller
Keyword(s):  
Myocardial Infarction ◽  
Heart Failure ◽  
Risk Stratification ◽  
Diagnostic Accuracy ◽  
Predictive Value ◽  
Acute Coronary Syndromes ◽  
Acute Chest Pain ◽  
High Sensitivity ◽  
Coronary Syndromes ◽  
Rule Out

Biomarkers, particularly high-sensitivity cardiac troponin T/I (hs-cTnT/I), play a major role in the early diagnosis and risk stratification of patients presenting with symptoms suggestive of an acute coronary syndrome such as acute chest pain. As heart specific markers of cardiomyocyte injury, hs-cTnT/I complement clinical assessment and the 12-lead electrocardiogram in the diagnosis of myocardial infarction, the risk stratification for life-threatening arrhythmias and death, and the triage towards early revascularization. Hs-cTnT/I allow the reliable measurement of cTnT/I concentrations around the 99th-percentile and in the normal range and increased the diagnostic accuracy for myocardial infarction at presentation. Absolute short-term changes in hs-cTnT/I within 1h or 2h further increase the diagnostic accuracy for myocardial infarction. The ESC hs-cTnT/I 0/1h-algorithms are assay-specific early triage algorithms optimized for the early rule-out and/or rule-in of myocardial infarction. They triage patients towards rule-out (about 60%), observe (about 25%), and rule-in (about 15%). Triage towards rule-out provides very high sensitivity (99%) and negative predictive value (>99%) for the safe rule-out of myocardial infarction, while triage towards rule-in provides high specificity (about 96%) and positive predictive value (about 75%) for myocardial infarction. Other biomarkers quantifying cardiomyocyte injury (e.g. CK-MB, CK, LDH, myosin-binding protein C) or other pathophysiological processes involved in acute coronary syndromes (e.g. copeptin, BNP, NT-proBNP) provide no or only very little incremental diagnostic value for myocardial infarction on top of the ESC hs-cTnT/I 0/1h-algorithms. However, the later provide incremental prognostic value for death and heart failure. Therefore, the use of BNP or NT-proBNP, as quantitative markers of hemodynamic stress and heart failure, should be considered.

scholarly journals Comparison between Amnisure Placental Alpha Microglobulin-1 Rapid Immunoassay and Standard Diagnostic Methods for Detection of Rupture of Membranes

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Beng Kwang Ng ◽  
Pei Shan Lim ◽  
Mohamad Nasir Shafiee ◽  
Nur Azurah Abdul Ghani ◽  
Nor Azlin Mohamed Ismail ◽  
...  
Keyword(s):  
Positive Predictive Value ◽  
Diagnostic Accuracy ◽  
Negative Predictive Value ◽  
Predictive Value ◽  
Medical Records ◽  
Accurate Method ◽  
Diagnostic Methods ◽  
Initial Presentation ◽  
Diagnostic Study ◽  
Tertiary Centre

Objective. To determine the diagnostic accuracy of placental alpha microglobulin-1 assay and standard diagnostic methods for detecting rupture of membrane.Study Design. Prospective diagnostic study, between June 2011 to November 2011 at a tertiary centre. Initial evaluation included both the standard diagnostic methods for rupture of membranes and placental alpha microglobulin-1 immunoassay. The actual rupture of membranes was diagnosed on review of the medical records after delivery (absence of membrane or a positive pad chart).Main Outcome Measures. Placental alpha microglobulin-1 immunoassay and standard diagnostic methods for diagnosis of rupture of membrane.Results. A total of 211 patients were recruited. At initial presentation, 187 patients (88.6%) had ruptured membranes, while 24 patients (11.4%) had intact membranes. Placental alpha microglobulin-1 immunoassay confirmed rupture of membranes at initial presentation with a sensitivity of 95.7% (179 of 187), specificity of 100% (24 of 24), positive predictive value of 100% (179 of 179), and negative predictive value of 75.0% (24 of 32). By comparison, the conventional standard diagnostic methods had a sensitivity of 78.1% (146 of 187), specificity of 100% (24 of 24), positive predictive value of 100% (146 of 146), and negative predictive value of 36.9% (24 of 65) in diagnosing rupture of membrane.Conclusion. Placental alpha-microglobulin-1 immunoassay is a rapid and accurate method for confirming the diagnosis of rupture of membrane. It was superior to conventional standard diagnostic methods (pooling, nitrazine, and ferning), the nitrazine test alone or fern test alone.

scholarly journals DIAGNOSTIC ACCURACY OF SALINE HYSTEROSONOGRAPHY IN DETECTING ENDOMETRIAL HYPERPLASIA IN PATIENTS WITH POST MENOPAUSAL BLEEDING

2020 ◽  
Vol 11 (2) ◽  
pp. 1-8
Author(s):  
Benish Yousuf ◽  
Hira Ambreen ◽  
Tahira Mariam ◽  
Abdul Raouf ◽  
Ambreen Yaseen ◽  
...  
Keyword(s):  
Diagnostic Accuracy ◽  
Predictive Value ◽  
Endometrial Hyperplasia ◽  
Foley Catheter ◽  
High Sensitivity ◽  
Cost Effective ◽  
Postmenopausal Bleeding ◽  
Cost Effective Method ◽  
Post Menopausal ◽  
Sensitivity Specificity

BACKGROUND & OBJECTIVE: Saline hysterosonography is a simple and cost-effective method with high sensitivity to detect uterine abnormalities causing postmenopausal bleeding. The objective of this study was to evaluate the diagnostic accuracy of saline hysterosonography in detecting endometrial hyperplasia in women with postmenopausal bleeding by taking histopathology as a gold standard. METHODOLOGY: A hundred and twenty (120) cases were enrolled from the outpatient and inpatient department of obstetrics and gynecology. Proper history and relevant examination of the patient was done. Then preparations were made for the procedure. The patient was counseled and the technique explained to her. Then Foley catheter no 12 was passed in cervix and sonography was done while instilling normal saline through a cervical catheter and scan pictures were frozen and results were given by expert gynecologist of Allied Hospital, Faisalabad. Histopathology specimen was sent to the pathology lab. RESULTS: Sensitivity, specificity, positive predictive value, negative predictive value, and diagnostic accuracy of saline hysterosonography in detecting endometrial hyperplasia was recorded as 96.15%,91,49%,75.76%,98.85%, and 92.5% respectively. CONCLUSION: Saline hysterosonography has high sensitivity to detect uterine hyperplasia. It can be used as a cost effective alternative to hysteroscopy in many units in Pakistan.

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