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V Latrabe

Publications and source records attributed to V Latrabe.

29 records · Page 2Linked to original sources
PubMed1999

Pneumothoraces and chest tube placement after CT-guided transthoracic lung biopsy using a coaxial technique: incidence and risk factors.

OBJECTIVE: This study investigates factors influencing the risk of pneumothorax and chest tube placement in patients undergoing CT-guided transthoracic lung biopsy for pulmonary lesions using a coaxial technique. SUBJECTS AND METHODS: The study included 307 patients with pulmonary lesions biopsied under CT guidance. Patient-related parameters considered were age, sex, presence of emphysema or bullae, and lung function data. Lesion-related variables were size, location, cavitary appearance on CT, pleural contact, and depth of the lesion. Procedure variables were duration, type of needle, and experience of the operator. All variables were analyzed as single and multiple dependent variables for occurrence of pneumothorax. RESULTS: Pneumothorax occurred in 61 (19.9%) of the 307 patients, and chest tube placement was required in six patients (2.0%). Univariate analysis showed that lesion size, lesion location, lesion depth, and difficulty of the procedure were significantly associated with a higher rate of pneumothorax. Using multivariate logistic regression analysis, we found that lesion depth from the pleural entry point was the sole variable that was significantly associated with an increased risk of pneumothorax. This risk increased with the depth of the lesion. Chest tube placement was required more frequently in patients with severe emphysema, obstructive lung disease, or hyperinflation. CONCLUSION: Lesion depth is the predominant risk factor for pneumothorax in patients undergoing CT-guided transthoracic lung biopsy. Chest tube placement is necessary more frequently in patients with severe emphysema, obstructive lung disease, or hyperinflation.

Adult↗
PubMed1999

[Transthoracic aspiration. Evaluation of cytologic and histologic diagnosis in a pulmonary nodule by retrospective comparison of 2 series of 267 cytoaspirations and 292 coaxial needle aspirations].

Percutaneous fine-needle aspiration is a well established method for the diagnosis of peripheral lung lesion. In order to compare different methods of aspiration, we analyze retrospectively two different series: 267 fine needle aspirations (FNA) compared with the histological diagnosis on surgical specimens and 292 lung biopsies using a coaxial technique with comparison between cytological diagnosis--smears and imprints--and histological diagnosis simultaneously obtained on the same specimen. The sensitivity (91%), the specificity (90%) and the overall typing accuracy related to the histological types obtained by FNAB are equivalent to those of the literature. The low rate of pneumothorax in the series (6%) is related to the use of immediate interpretation of the specimen. Automated biopsy with a coaxial cutting needle provide cytological specimens--smears and imprint--with a high rate of sensibility (95.3%) and of sensibility (98%). The overall sensitivity of the cytological methods alone is better than biopsy (95.3% vs. 92.9%), but the typing accuracy is not as good as biopsy alone (98% vs. 100%). False-positive and false-negative diagnoses are the same in both series. In conclusion the percutaneous aspiration method choose to establish a morphological diagnosis in lung lesion depends now on the habits of the radiologist and the pathologist.

Biopsy, Needle↗
PubMed1998

Mediastinal masses: diagnostic approach.

In most clinical situations the modern radiological approach to a mediastinal mass consists of performing a CT scan following the chest radiograph. Magnetic resonance imaging is indicated when CT findings are equivocal and as the first-line method in particular situations such as suspected involvement of the posterior mediastinum. In both techniques, tissular components of the mass assessed by density or signal intensity analysis, together with the precise location, are the leading edge of the radiological diagnosis. This review deals mainly with the differential diagnosis of primary neoplasms according to CT and MRI findings.

Diagnosis, Differential↗
PubMed1998

A validation of a flow quantification by MR phase mapping software.

AIM: We evaluated a Siemens software of flow quantification (FQ) by MR phase mapping, in the framework of a common practical use. METHODS: Experiments with a laminar flow phantom and in vivo pulsatile flow were performed. In particular, FQ in ascending aorta was investigated in healthy volunteers. RESULTS AND CONCLUSION: Flow phantom experiments reveal that the FQ slightly underestimates (8% on the average) actual velocities (mean velocities over a vessel area), and also that velocity uncertainties are related to the encoding velocity value, whatever the measured velocity. Furthermore, using well characterized working criteria, we found low intraobserver variability and negligible interobserver variability in ascending aorta FQs. The role played by the choice of reference area in FQ accuracy is emphasized. When recording several cardiac cycles during the same acquisition, it is shown that the FQ software may provide erroneous results. Several comments for FQ software use in the ascending aorta are added.

Adult↗
PubMed1998

[Comparison of echocardiographic automatic border detection and magnetic resonance imaging. Measurements of the left ventricle in normal subjects].

Echocardiographic automatic border detection (ABD) has been the object of several studies with diverging results. The aim of this study was to verify the validity of ABD measurements by comparison with magnetic resonance imaging (MRI). Twenty healthy subjects underwent measurement of end systolic surface (ESA) and end diastolic surface areas (EDA) and fraction of surface variation (FSV), end systolic volume (ESV), end diastolic volume (EDV and ejection fraction (EF). These results were compared with the same parameters measured by cine MRI and a study of the variability of interpretation was performed on the echocardiographic parameters. An ABD analysis was possible in 80% of the study population. The correlations were satisfactory between the EDA and EDV (EDA; r = 0.84; SD = 1.9 cm2; EDV; r = 0.90; SD = 12 ml) with acceptable confidence intervals (CI) (EDA; [-4.02; 1.19 cm2]/EDV; [26; +7.9 ml]) and an underestimation of ABD values (EDA; -9%/EDV: -10%). With regards to the end systolic measurements, the correlations were not as good (ESA: r = 0.68; SD = 1.5 cm2/EDV: r = 0.59; +12 ml) with a more important measurement error (ESA: -2.05; +3.45 cm2)/EDA: (-9; +27 ml) and an overestimation of the ABD values (ESA; +10%; ESV; +18%). No correlation was observed between the FSV and EF. The intra and inter-observer errors were compared with those of conventional echocardiography (intra-observer error; 10.7-16.9%/inter-observer error; 10.8-16.6%). The authors conclude that ABD has a non-negligeable measurement error which limits its application in clinical practice. New transducers, automatisation of gain adjustment and new technologies should improve ABD measurements.

Adult↗
PubMed1996

[Hypoplasia of the inferior vena cava with intrahepatic continuation. Color Doppler ultrasonography and MRI].

We report a rare case of inferior vena cava hypoplasia discovered fortuitously, with intra-hepatic venous shunts, explored only by color-doppler ultrasound and MRI. These noninvasive imaging tests demonstrated that the intra hepatic collateral pathway arose from an inferior (accessory) right hepatic vein and flowed into the right and middle hepatic veins. Due to these findings a cavography was avoided in this asymptomatic patient.

Adult↗
PubMed1994

[MRI of the heart: morphological and functional aspects].

The performances of cardiac magnetic resonance imaging have been recently improved by the possibility of obtaining functional information by means of gradient echo sequences. Cavity volumetry and wall thickness and mass measurements are now possible. Ultrarapid sequences are useful for the analysis of myocardial perfusion and methods for measuring blood flow and temporal labelling of the ventricular wall open up new prospects for functional evaluation of the heart. In clinical practice, MRI can be useful for the exploration of cardiac parietal and intracavitary masses, constrictive pericarditis, hypertrophic and restrictive cardiomyopathy and cardiac malformations. Assessment of valvular and coronary heart disease is based on new techniques and is currently under evaluation.

Heart Defects, Congenital↗
PubMedDate not supplied

Percutaneous CT-guided biopsy of the lung: comparison between aspiration and automated cutting needles using a coaxial technique.

PURPOSE: To compare the accuracy and complication rate of two different CT-guided transthoracic needle biopsy techniques: fine needle aspiration and an automated biopsy device. METHODS: Two consecutive series of respectively 125 (group A) and 98 (group B) biopsies performed using 20-22 gauge coaxial fine needle aspiration (group A) and an automated 19.5 gauge coaxial biopsy device (group B) were compared in terms of their accuracy and complication rate. RESULTS: Groups A and B included respectively 100 (80%) and 77 (79%) malignant lesions and 25 (20%) and 18 (21%) benign lesions. No significant difference was found between the two series concerning patients, lesions, and procedural variables. For a diagnosis of malignancy, a statistically significant difference in sensitivity was found (82.7% vs 97.4%) between results obtained with the automated biopsy device and fine needle aspiration respectively. For a diagnosis of malignancy, the false negative rate of the biopsy result was significantly higher (p <0.005) in group A (17%) than in group B (2.6%). For a specific diagnosis of benignity, no statistically significant difference was found between the two groups (44% vs 26%) but the automated biopsy device provided fewer indeterminate cases. There was no difference between the two groups concerning the pneumothorax rate, which was 20% in group A and 15% in group B, or the hemoptysis rate, which was 2.4% in group A and 4% in group B. CONCLUSION: For a diagnosis of malignancy when a cytopathologist is not available on-site, automated biopsy devices provide a lower rate of false negative results and a similar complication rate to fine needle aspiration.

Adult↗