scholarly journals Systematic Sonography Looking for Occult Wounds: accuracy of an abdominal ultrasound adjunct in penetrating trauma

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Sri Devi Jagjit ◽  
Jordan Rupp ◽  
Robinson M. Ferre ◽  
Mary Kate Jordan ◽  
Brian Bales
Keyword(s):  
Positive Predictive Value ◽  
Negative Predictive Value ◽  
Likelihood Ratio ◽  
Predictive Value ◽  
False Positive ◽  
Fluid Collection ◽  
False Negative ◽  
Case Series ◽  
Penetrating Trauma ◽  
Care Surgery

Abstract Background Systematic Sonography Looking for Occult Wounds (SSLOW) in trauma is a novel technique for the evaluation of intra-abdominal wounds in penetrating trauma. No data exist regarding the effectiveness. The objective of this study was to evaluate the accuracy of the SSLOW exam. Methods This is a prospective collected case series conducted over a period of 10 months and took place at the Accident and Emergency Department (A&E) of the Georgetown Public Hospital Corporation (GPHC). The study enrolled patients presenting to the A&E who were 16 years old or greater with penetrating abdominal trauma. All patients with penetrating trauma received an E-FAST examination. If the E-FAST examination was negative, a SSLOW examination was completed. The sonographer evaluated for free fluid collection between the loops of bowel. The results of the SSLOW were compared to usual care (surgery consult, serial abdominal and E-FAST exams, laparotomy, and 7-day follow-up) and then categorized into four groups: true positive, false positive, true negative, and false negative. These results lead to four categorical values. From these results, sensitivity, specificity, positive predictive value, negative predictive value, and likelihood ratios were calculated. Results There were 5 (12%) true positives, 1 (2%) false positive, 37 (86%) true negatives, and zero (0%) false negative. The SSLOW was 100% sensitive (95% CI 5–100%) and 97% specificity (95% CI 74–96%). There was an 80% positive predictive value (95% CI 1.0–64% 95% CI) and 100% negative predictive value (95% CI 88–100%). The positive likelihood ratio was 8.4 (95% CI 3.69–19.1) and negative likelihood ratio was 0. Conclusion The SSLOW examination may be a useful tool in the evaluation of penetrating abdominal injuries.

scholarly journals Comparison of efficiency between RMI1 and RMI2 in diagnosing ovarian malignancy

2019 ◽  
Vol 8 (8) ◽  
pp. 2991
Author(s):  
Rashmi R. Shalagar ◽  
Narayan Y. Kabadi
Keyword(s):  
Positive Predictive Value ◽  
Negative Predictive Value ◽  
Predictive Value ◽  
False Positive ◽  
Medical Condition ◽  
Menopausal Status ◽  
False Negative ◽  
Histopathological Diagnosis ◽  
Risk Of Malignancy ◽  
Risk Of Malignancy Index

Background: This study was conducted in department of obstetrics and gynaecology, to know the efficiency of risk of malignancy index (RMI) to differentiate a malignant from a benign tumor and to compare the efficiency of risk of malignancy index 1 and 2 (RMI1 and RMI2). The study was conducted from June 2012 to August 2013 in women who got admitted with adnexal tumor.Methods: It was a prospective study. A proforma was designed for each patient which included, name, age, complaints, menopausal status, parity, past and family history and associated medical condition were asked. Indivisual parameters namely ultrasound score, CA125 and menopausal status and risk of malignancy index was calculated and compared with final histopathological diagnosis and sensitivity specificity and positive predictive value was calculated for each.Results: : The sensitivity of RMI1 is 87.95%, specificity is 75%, positive predictive value is 94.8%, negative predictive value is 54.54%, percentage of false negative is 12.04% and percentage of false positive is 25%. The sensitivity of RMI2 is 86.74%, specificity is 81.25%, positive predictive value is 96%, negative predictive value is 54.16%, percentage of false negative is 13.25% and percentage of false positive is 18.75%.Conclusions: The efficiency of RMI was definitely better than indivisual parameters and efficiency of RMI 1 and RMI2 are similar.

scholarly journals Cytological Smear and Cell Block Versus Tissue Biopsies in the Diagnosis of Malignant Tumours in Non-Gynaecologic Specimens

1970 ◽  
Vol 28 (5) ◽  
Author(s):  
Nasar Alwahaibi ◽  
Asmaa Alghallabi ◽  
Shadia Alsinawi ◽  
Najat Aldairi
Keyword(s):  
Positive Predictive Value ◽  
Negative Predictive Value ◽  
Predictive Value ◽  
False Positive ◽  
False Negative ◽  
Cell Block ◽  
Malignant Tumours ◽  
Cytological Smear ◽  
Scanty Information ◽  
Sensitivity Specificity

BACKGROUND: Cytological smear and cell block (CB) are routinely used to diagnose non gynaecologic specimens. However, there is scanty information in the literature to compare cytological smear and CB with the corresponding tissue biopsies. This study is aimed at evaluating the accuracy of cytological smear and CB in the diagnosis of malignant tumours in non-gynaecologic specimens.MATERIALS AND METHODS: A total of 70 malignant cases were subjected to cytological smear and CB. Corresponding histopathology was also included. The most frequent immunomarkers found between CB and tissue biopsies were also correlated. Accuracy, sensitivity, specificity, positive predictive value, negative predictive value, false positive and false negative values were analyzed for each method.RESULTS: The accuracy, sensitivity and positive predictive value for cytological smear were 92.8%, 100.0% and 92.9%, whereas for CB were 91.4%, 98.4% and 92.7%, respectively. In CB method, the accuracy, sensitivity and positive predictive value for CK7 were 88.9%, 91.7% and 95.6%, whereas for CK5/6 were 75%, 100% and 57.1%, respectively.CONCLUSION: Cytological smear and CB are very sensitive and accurate in the detection of malignant tumours in nongynaecologic specimens. Additional corresponding tissue biopsiesshould be re-evaluated. 

scholarly journals Evaluation of the Carba NP Test for Rapid Detection of Carbapenemase-Producing Enterobacteriaceae and Pseudomonas aeruginosa

2013 ◽  
Vol 57 (9) ◽  
pp. 4578-4580 ◽  
Author(s):  
Nathalie Tijet ◽  
David Boyd ◽  
Samir N. Patel ◽  
Michael R. Mulvey ◽  
Roberto G. Melano
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Positive Predictive Value ◽  
Negative Predictive Value ◽  
Predictive Value ◽  
Rapid Detection ◽  
False Negative ◽  
Bacterial Extract ◽  
Content Type ◽  
Negative Results ◽  
False Negative Results

ABSTRACTThe Carba NP test was evaluated against a panel of 244 carbapenemase- and non-carbapenemase-producingEnterobacteriaceaeandPseudomonas aeruginosaisolates. We confirmed the 100% specificity and positive predictive value of the test, but the sensitivity and negative predictive value were 72.5% and 69.2%, respectively, and increased to 80% and 77.3%, respectively, using a more concentrated bacterial extract. False-negative results were associated with mucoid strains or linked to enzymes with low carbapenemase activity, particularly OXA-48-like, which has emerged globally in enterobacteria.

Transcutaneous Bilirubin Measurements in Full-Term Infants

PEDIATRICS ◽  
1982 ◽  
Vol 70 (3) ◽  
pp. 464-467 ◽  
Author(s):  
M. Jeffrey Maisels ◽  
Sarah Conrad
Keyword(s):  
Positive Predictive Value ◽  
Predictive Value ◽  
False Positive ◽  
Neonatal Jaundice ◽  
Serum Bilirubin ◽  
False Negative ◽  
Full Term ◽  
Bilirubin Concentration ◽  
Term Infants ◽  
Transcutaneous Bilirubin

A total of 292 transcutaneous bilirubin (TcB) measurements were performed in 157 white full-term infants: 157 were obtained from the forehead and 135 from the midsternum. TcB measurements correlated well with serum bilirubin determinations (r = .93, P < .0001). The sensitivity of the test was 100% and the specificity 97%. It was possible to establish guidelines for the TcB measurement which identified all infants whose serum bilirubin concentrations exceeded 12.9 mg/100 ml (221 µmoles/liter) with no false-negative and only five false-positive determinations (3%). The positive predictive value for the TcB measurements was 58%. This implies that, in our population, an infant with a TcB index ≥24 has a 58% chance of having a serum bilirubin concentration >12.9 mg/100 ml. The negative predictive value was 100%. Thus, a negative test will correctly predict the absence of hyperbilirubinemia in all cases. As these measurements were obtained prospectively in a well-baby population with a prevalence of hyperbilirubinemia (>12.9 mg/100 ml) of 4.5%, the positive predictive value should be applicable to other similar populations and will, in fact, increase in populations with a higher prevalence of hyperbilirubinemia. TcB measurements can be recommended for the identification of significant neonatal jaundice in full-term infants. It is important to recognize, however, that because of potential variations in TcB meters as well as serum bilirubin measurements in different laboratories, each institution should establish its own criteria for the use of this instrument.

Diagnostic Value of WB-DWI Versus 18 F-FDG PET/CT for the Detection of Multiple Myeloma

2020 ◽  
Author(s):  
Bei Zhang ◽  
Li Zhang ◽  
Bingyang Bian ◽  
Fang Lin ◽  
Zining Zhu ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Positive Predictive Value ◽  
Negative Predictive Value ◽  
Predictive Value ◽  
False Positive ◽  
Fdg Pet ◽  
Pet Ct ◽  
Adc Values ◽  
Sensitivity Specificity ◽  
Fdg Pet Ct

Abstract BACKGROUND Whole body diffusion weighted imaging (WB-DWI) is commonly used for the detection of multiple myeloma (MM). Comparative data on the efficiency of WB-DWI compared with 18 F positron emission tomography computed tomography ( 18 F-FDG PET/CT) to detect MM are lacking. METHODS This was a retrospective, single-center study of twenty-two patients with MM enrolled from January 2019 to December 2019. All patients underwent WB-DWI and 18 F-FDG PET/CT. Pathological and clinical manifestations as well as radiologic follow-up were used for diagnosis. The overall accuracy, sensitivity, specificity, positive predictive value and negative predictive value of both methods were compared. The appearance diffusion coefficient (ADC) values of MM lesions and false-positive lesions were estimated. RESULTS A total of 214 MM bone lesions were evaluated. WB-DWI showed a higher overall accuracy than PET/CT (75.7% and 55.6%, respectively; < 0.05). However, for sensitivity, specificity, positive predictive value and negative predictive value, there were no significant differences for WB-DWI vs PET/CT (99.3% and 83.9%, 64.9% and 94.8%, 63.6% and 54.2%, 98.1% and 65.3%, respectively). The ADC value for MM lesions was significantly lower than that for false-positive lesions (p < 0.001). Receiver operating curve (ROC) curve analysis showed that the AUC was 0.846, and when the cut-off value was 0.745×10 -3 mm 2 /s, the sensitivity and specificity were 86.0% and 82.4%, respectively, which distinguished MM lesions from non-MM lesions. CONCLUSION WB-DWI may be a useful tool for the diagnosis of MM bone disease due to to higher overall accuracy and measurements of ADC values compared with PET/CT.

Prediction of Adnexal Torsion by Ultrasound in Women with Acute Abdominal Pain

2019 ◽  
Vol 41 (06) ◽  
pp. 688-694
Author(s):  
Ron Bardin ◽  
Noga Perl ◽  
Reuven Mashiach ◽  
Eitan Ram ◽  
Sharon Orbach-Zinger ◽  
...  
Keyword(s):  
Abdominal Pain ◽  
Positive Predictive Value ◽  
Predictive Value ◽  
False Positive ◽  
Acute Abdominal Pain ◽  
Cohort Analysis ◽  
False Negative ◽  
True Positive ◽  
Adnexal Torsion ◽  
Positive Group

Abstract Purpose To investigate the accuracy of ultrasound in the diagnosis of adnexal torsion. Materials and Methods Retrospective cohort analysis of 322 women, presenting to a tertiary medical center with acute abdominal pain, who underwent gynecological examination, sonographic evaluation and laparoscopic surgery, between 2010 and 2016. Findings for adnexal torsion were compared among three groups: positive sonographic findings consistent with surgically confirmed adnexal torsion (true positive, n = 228); negative sonographic findings inconsistent with surgically confirmed adnexal torsion (false negative, n = 42); and positive sonographic findings inconsistent with a surgical diagnosis other than adnexal torsion (false positive, n = 52). Outcome measures were sensitivity and positive predictive value of ultrasound, and its specific features, for the diagnosis of adnexal torsion. Results The sensitivity of ultrasound for adnexal torsion diagnosis was 84.4 %, and the positive predictive value was 81.4 %. Edematous ovary and/or tube, as well as positive whirlpool sign had the highest sensitivity and positive predictive value. The false-negative group had the highest frequency of ovarian cysts (p = 0.0086) and the lowest frequency of ovarian edema (p < 0.0001). The false-positive group had the lowest proportion of pregnant women (p = 0.0022). Significantly more women in the true-positive group had a prior event of adnexal torsion (p = 0.026). Conclusion Ultrasound examination is highly accurate in the diagnosis of adnexal torsion. Clinicians should be aware of the presence of demographic and clinical characteristics that may positively or negatively affect sonographic diagnostic accuracy.

scholarly journals Does the clinical assessment help in predicting malignancy in thyroid swell

2017 ◽  
Vol 5 (1) ◽  
pp. 12-13
Author(s):  
Ishwor Raj Devkota ◽  
S. Bhandary ◽  
S. Karki
Keyword(s):  
Positive Predictive Value ◽  
Clinical Assessment ◽  
Thyroid Surgery ◽  
Predictive Value ◽  
False Positive ◽  
Thyroid Nodules ◽  
False Negative ◽  
Male Ratio ◽  
The Mean ◽  
One Year

Objectives: To predict malignant nodules in solitary thyroid nodules on clinical assessment.Materials and methods: A total of 48 cases with thyroid nodule were clinically assessed in detail and underwent the standard thyroid surgery at BPKIHS, Dharan during the period of one year (April 2012 to march 2013).Results: The mean age was 41.42 years with female to male ratio of 15:1. Most of the patients were euthyroid (73%). Majority of the thyroid nodules were malignant (85.4%) and only 14.6% were benign on clinical assessment. The sensitivity of clinical evaluation was 84.6%, specificity 13.6%, positive predictive value 53.6%, negative predictive value 42.8%. Percentage of the false negative, false positive and overall accuracy was 57.1%, 46.3% and 52% respectively.Conclusion: Even though the sensitivity is high, clinical assessment has low specificity. So we cannot rely on clinical assessment in predicting malignancy in the thyroid nodules.  

scholarly journals Prevalence and identification of anxiety disorders in pregnancy: the diagnostic accuracy of the two-item Generalised Anxiety Disorder scale (GAD-2)

BMJ Open ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. e023766 ◽  
Author(s):  
Selina Nath ◽  
Elizabeth G Ryan ◽  
Kylee Trevillion ◽  
Debra Bick ◽  
Jill Demilew ◽  
...  
Keyword(s):  
Anxiety Disorder ◽  
Positive Predictive Value ◽  
Anxiety Disorders ◽  
Diagnostic Accuracy ◽  
Negative Predictive Value ◽  
Likelihood Ratio ◽  
Predictive Value ◽  
Stratified Sampling ◽  
Generalised Anxiety Disorder ◽  
Population Prevalence

ObjectiveTo estimate the population prevalence of anxiety disorders during pregnancy and investigate the diagnostic accuracy of the two-item Generalised Anxiety Disorder scale (GAD-2) for a) GAD and b) any anxiety disorder.DesignCross-sectional survey using a stratified sampling design. Sampling weights were used in the analysis to adjust for the bias introduced by the stratified sampling.SettingInner-city maternity service, South London.Participants545 pregnant women were interviewed after their first antenatal appointment; 528 provided answers on the GAD-2 questions.Main outcome measuresDiagnosis generated by the Structured Clinical Interview for Diagnostic and Statistical Manual of Mental Disorders, 4th edition (SCID).ResultsPopulation prevalence of anxiety disorders was 17% (95% CI 12% to 21%): 5% (95% CI 3% to 6%) for GAD, 4% (95% CI 2% to 6%) for social phobia, 8% (95% CI 5% to 11%) for specific phobia and 2% (95% CI 1% to 4%) for obsessive-compulsive disorder. Post-traumatic stress disorder (PTSD) prevalence was unclear due to higher levels of reluctance to respond to PTSD interview questions but sensitivity analyses suggest population prevalence maybe up to 4% (95% CI 2% to 6%). Weighted sensitivity of GAD-2 for GAD (cut-off ≥3) was 69%, specificity 91%, positive predictive value 26%, negative predictive value 98% and likelihood ratio 7.35. For any anxiety disorder the weighted sensitivity was 26%, specificity 91%, positive predictive value 36%, negative predictive value 87% and likelihood ratio 2.92.ConclusionsAnxiety disorders are common but GAD-2 generates many false positives and may therefore be unhelpful in maternity services.

Multislice computed tomography angiography screening for new aneurysms in patients with previously clip-treated intracranial aneurysms: feasibility, positive predictive value, and interobserver agreement

2006 ◽  
Vol 105 (5) ◽  
pp. 682-688 ◽  
Author(s):  
Irene C. van der Schaaf ◽  
Birgitta K. Velthuis ◽  
Marieke J. H. Wermer ◽  
Nanne J. Frenkel ◽  
Charles B. L. M. Majoie ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Positive Predictive Value ◽  
Ct Angiography ◽  
Predictive Value ◽  
False Positive ◽  
Intracranial Aneurysms ◽  
Multislice Computed Tomography ◽  
Interobserver Agreement ◽  
False Negative ◽  
Titanium Clips

Object Multislice computed tomography (CT) angiography may be useful for screening patients with intracranial aneurysms that are treated with clip occlusion. However, cobalt clips produce much more artifact on CT scans than titanium clips, which may hamper the evaluation of the image obtained at the clip site. Methods The authors screened 415 patients with previously ruptured aneurysms that had been treated using cobalt clips. Screening was performed using multislice CT angiography. The feasibility of this modality for screening these patients (based on the complication risk, CT angiography quality, and artifact avoidance) and interobserver agreement were evaluated. Patients in whom the presence of an aneurysm was suspected based on results of CT angiography studies underwent digital subtraction (DS) angiography. False-negative and false-positive findings were recorded, and the positive predictive value (PPV) was calculated. Eight patients (1.9%) had allergies to the contrast material. The quality of the CT angiography image was suboptimal in 14%. In 52%, clip artifacts hampered evaluation of the clip site. In 65 patients who underwent DS angiography, there were nine false-positive and eight false-negative reports related to aneurysms that were either small, located at the clip site, or were infundibula. The PPV on a per-patient basis was 86% (95% confidence interval [CI] 75–94%); for aneurysms at the clip site it was 83% (95% CI 61–95%); and for aneurysms at different locations it was 91% (95% CI 81–97%). The interobserver agreement was good (κ = 0.69; 95% CI 0.60–0.78). Conclusions Except for the evaluation of images from the clip site, CT angiography has good feasibility with good PPV and interobserver agreement. Drawbacks are that very small aneurysms can be missed and that visualization is poor at the clip site in patients in whom cobalt clips have been placed for occlusion. This second problem can be expected to resolve with the increasing use of titanium clips.

scholarly journals C-reactive protein, as a marker for predicting acute appendicitis and its severity in KVG medical college and hospital, Sullia

2021 ◽  
Vol 8 (10) ◽  
pp. 3002
Author(s):  
Abhirup H. Ramu ◽  
Priyanka Kenchetty ◽  
Aishwarya K. Chidananda
Keyword(s):  
Acute Appendicitis ◽  
Positive Predictive Value ◽  
Negative Predictive Value ◽  
Predictive Value ◽  
False Negative ◽  
Clinical Suspicion ◽  
C Reactive Protein ◽  
Common Procedure ◽  
Medical College ◽  
Reactive Protein

Background: Appendicectomy for suspected acute appendicitis is a common procedure. The rate of normal appendices unnecessarily removed remains high despite several techniques and investigations used to improve the diagnostic accuracy. This study emphasizes the value of C reactive protein (CRP) in three groups of patients operated for clinical suspicion of acute appendicitis with different finding at appendicectomy namely an un-inflamed appendix, uncomplicated acute appendicitis or complicated acute appendicitis.Methods: This prospective study was performed on 100 consecutive patients who were operated on for treatment of acute appendicitis in KVG medical college and hospital between 01 August 2019 to 01 February 2021. Clinically proven by a surgeon, patients underwent appendicectomy. Serum CRP results of all patients were determined. Sensitivity, specificity, positive predictive value and negative predictive value were calculated. Statistical analysis will be made using descriptive statistic and SPSS version 21 was used for analysis.Results: The percentage of negative laparotomies was 13% and surgeon ‘s clinical suspicion was true in 87%. Preoperative CRP values were false negative in 21 patients with appendicitis and false positive in 2 patients with normal appendix. The difference of true and false results between CRP tests and surgeon’s diagnosis was statistically significant (p=0.001). Present study revealed, sensitivity=76%, specificity=87.5%, positive predictive value=96% and negative predictive value=41%.Conclusions: Serum C reactive protein when elevated supports the surgeon’s clinical diagnosis of acute appendicitis. It can be used frequently to diagnosis the acute appendicitis, so that the complication rate and negative laparotomies can be avoided. 

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