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Biomedical subjects

P Bourrier

Publications and source records attributed to P Bourrier.

At least 19 recordsLinked to original sources
PubMed2005

[Diagnosis of a malignant lymph node].

There are several imaging techniques, each with advantages and limitations. Standard or computed radiography is always useful. CT diagnosis of an enlarged lymph node is easy but it is very difficult to conclude about its reactive or metastatic nature: subtle signs can help. MRI has similar pitfalls but sometimes it may be possible to identify fibrotic scarred nodes. US with Doppler can evaluate the abnormal angioarchitecture of a metastatic lymph node. Sentinel lymph nodes are easily identified by nuclear medicine. CT-PET provides morphologic and metabolic information which increases the diagnostic accuracy. Imaging work-up strategies for selected malignancies are discussed.

Biopsy, Needle↗
PubMed2001

[Acute pyelonephritis. Randomized multicenter double-blind study comparing ciprofloxacin with combined ciprofloxacin and tobramycin].

OBJECTIVES: To investigate the effects of an intravenous injection of tobramycin (T) in female patients with acute uncomplicated pyelonephritis treated with ciprofloxacin (CIP) (500 mg bid per os). METHODS: It was a randomized, multicenter, double-blind study conducted in six departments of emergency medicine. The main exclusion criteria were: previous history of urinary tract malformation of lithiasis, a recent urological procedure, pregnancy, diabetes mellitus, immunodepression, or severe sepsis. The primary criteria for evaluation were: the percentage and rate of clinical recovery, as well as bacteriological efficacy. RESULTS: 118 women were enrolled, 60 in the tobramycin group and 58 in the placebo group. E. coli was the most commonly isolated organism; all organisms were susceptible to ciprofloxacin and tobramycin. Two women in the CIP + T group and four women in the CIP + P group failed to respond clinically. The recovery rate was similar in the two groups (96 and 93% respectively). CONCLUSION: Administration of a dose of tobramycin did not demonstrate its clinical benefit in treatment of acute uncomplicated pyelonephritis treated by oral ciprofloxacin.

Acute Disease↗
PubMed1996

Imaging findings in giant pseudotumoral paraesophageal varices.

We report a case of variceal changes of the azygos vein, hemiazygos vein, and paraesophageal collaterals presenting as bilateral posterior mediastinal masses in a patient with long-standing portal hypertension due to hepatosplenic schistosomiasis. The case is unusual because the varices were considerably larger than those usually encountered in portal hypertension. Dynamic CT allowed the diagnosis in demonstrating the vascular nature of these masses, which enhanced to the same degree as the other vessels. Noninvasive techniques, such as color Doppler sonography and MRI, may also be useful due to their multiplanar capabilities.

Azygos Vein↗
PubMed1995

[Ethyl alcohol levels in the expiratory air vs blood alcohol levels. 204 cases in an emergency unit].

OBJECTIVES: Twenty to forty percent of all patients admitted to the emergency ward are positive for blood alcohol. Devices which measure alcohol in expired breath have been increasingly used in these units. This study was conducted to compare the results of breath alcohol analyzers with the classical laboratory methods based on enzyme assay and gas phase chromatography. METHODS: All patients with suspected acute ethanol intoxication at admission to the emergency room were included if blood alcohol had been ordered (enzyme assay and gas phase chromatography). RESULTS: There were 204 patients (151 men (74%) and 53 women (26%); mean age 43 +/- 12.7 years, range 14-80). The coefficient of correlation between blood alcohol level determined by gas phase chromatography (GC) and breath alcohol was 0.96 (r2 = 0.92, p < 10(-4)). The coefficient of correlation between breath alcohol and blood alcohol level determined by enzyme assay was 0.96 (r2 = 0.92, p < 10(-4)). Comparing the coefficients of correlation GC/blood (r2 = 0.92) versus GC/enzyme assay (r2 = 0.96) demonstrated a statistically significant difference (p < 10(-3)). CONCLUSION: In our 204 patients, the breath alcohol analyzer gave 3 false positives and 3 false negatives (2.94%). Even though breath alcohol levels are 21.1% lower than the levels given by gas phase chromatography, it is an instantaneous nonaggressive method well correlated with classical blood tests. Nevertheless, this method could not be used in 19.6% of emergency patients due to physical impossibility or refusal, justifying laboratory tests.

Acute Disease↗
PubMed1995

Laser guidance system for CT-guided procedures.

In a phantom and in 37 patients, a simple laser guidance system for computed tomography (CT)-guided procedures used the software program of the CT scanner and a laser beam mounted on the CT gantry without need for additional software or components. The skin entry point and angulation of the target path were determined. Then the system projected the desired needle path (including compound angulation), allowing accurate needle placement in all cases, even in small lesions.

Adult↗
PubMed1994

Anatomic study of the lumbar region applied to multiplanar imaging techniques: importance and use of oblique vertical sections.

This anatomic study of the lumbar region (as defined by Rouvière [11]) applied to multiplanar imaging techniques was carried out both in the cadaver and in vivo. The cadaver study (5 cases) consisted of anatomic sections (transverse, sagittal, frontal and oblique) and computerised three-dimensional reconstructions after CT studies on subjects injected with colored and radio-opaque latex. The in vivo study (4 cases) used MRI sections and three-dimensional ultrasound sections coupled with the pulsed doppler. The spatially referenced oblique vertical sections revealed the structures from unusual aspects, situating them amidst the retroperitoneal area with the maximum of topographic landmarks. The transposition of these results (obtained by sectional anatomy of the retroperitoneal region) to the new techniques of multiplanar formatting after MRI, ultrasound or CT data acquisition should optimise the investigation of certain retroperitoneal structures by specifying the ideal planes of section for each organ, while diminishing certain artefacts specific to acquisitions in the traditional planes of section. Oblique vertical sections seem eminently suitable for ultrasound location of the suprarenal compartments, study of the renal pedicles and topographic retroperitoneal location. This oblique vertical visualisation constitutes a fundamental resource for the development of video-monitored surgical procedures as it corresponds exactly to the axes of the access routes in percutaneous surgery of the kidney and the adjacent anatomic structures.

Cadaver↗