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S Tamburrini

Publications and source records attributed to S Tamburrini.

9 recordsLinked to original sources
PubMed2006

Effects of iodinated contrast media on common carotid and brachial artery blood flow and wall shear stress.

The aim of our study was to evaluate the effect of the intravenous contrast media iomeprol on wall shear stress, blood flow and vascular parameters in the common carotid and brachial artery. Thirty outpatients undergoing thoracic or abdominal spiral CT scans were studied. The internal diameter and flow velocity of the common carotid and brachial artery were evaluated by ultrasound, and blood viscosity was measured before and after low osmolality iomeprol (Iomeron 350) injection. The wall shear stress, blood flow and pulsatility index were calculated. To test the differences between groups, the Wilcoxon rank test and Mann Whitney U test were applied. Blood viscosity decreased slightly, but significantly after contrast media (4.6+/-0.7 vs. 4.5+/-0.7 mPa.s, P = 0.02). Contrarily, blood flow and wall shear stress did not change in the common carotid artery, but significantly decreased in the brachial artery (0.9+/-0.4 vs. 0.6+/-0.3 ml/s, P < 0.0001, and 41.5+/-13.9 vs. 35.3+/-11.0 dynes/cm2, P < 0.002, respectively), whereas the pulsatility index significantly increased in the brachial artery (5.0+/-3.3 vs. 7.5+/-5.3, P < 0.001). Iomeprol injection causes blood flow and wall shear stress reduction of the brachial artery; the rise in the pulsatility index suggests an increase in peripheral vascular resistance. Further investigation is needed to evaluate whether these modifications can be clinically relevant.

Adult↗
PubMed2002

Pseudoaneurysm of the thoracic aorta in patients with human immunodeficiency virus infection.

Arterial pseudoaneurysm has been reported as a possible complication of immunodeficiency virus infection. We report two cases of HIV-positive patients with a pseudoaneurysm at the level of the descending thoracic aorta. The first patient refused surgery and has been followed up to 14 months, whereas the second patient underwent successful surgical repair. The importance of magnetic resonance imaging in the diagnosis of thoracic aorta pseudoaneurysm is also discussed.

Adult↗
PubMed2001

[The value of the MR imaging in the evaluation of Müllerian duct anomalies].

PURPOSE: To reaffirm the role of MRI in the assessment of the M#159;llerian duct anomalies (MDAs). MATERIAL AND METHODS: Between November 1997 and April 2001, 22 patients, age range 18-40 years (mean 29 years) were investigated with MRI and US. The MRI study was performed with a 0,5 Tesla imager (Vectra, GE Medical System) with body-coil; neither oral nor intravenous contrast was used. We obtained SE T1-weighted, fast STIR with fat suppression and FSE T2-weighted sequences. Sagittal, paracoronal and paraxial images were acquired. The paraxial images were obtained to produce true coronal images of the uterus. In evaluating MDAs, imaging the uterus in its true coronal plane is essential to assess the external fundal contour. US examination was performed with an HDI 3000, ATL, using the trans-vaginal approach. The MDAs were subdivided according to the Buttram and Gibbons classification. RESULTS: There were 22 cases of laparoscopic and hysteroscopic proved anomalies; MRI allowed correct diagnosis of 21 uterine anomalies (accuracy, 95%) whereas U.S. was correct in 20 of 22 cases (accuracy, 92%). The MRI was excellent in depicting the uterine morphology in one case of unicornuate uterus with rudimentary horn non-comunicating with the main cavity and distended by hematometra and associated hematosalpinx. Further-more evaluating composition, thickness and extension of the uterine septum and aspect of the fundal contour, MRI allowed to differentiate definitively between bicornuate uterus and septate uterus. This is a very important distinction to do because it significantly affects patient treatment: a septate uterus requires hysteroscopic septectomy, while a bicornuate uterus does not requires surgical treatment. CONCLUSIONS: Given its characteristics, MRI is a very accurate imaging modality in uterine evaluation and contributes significantly to treatment planning. Although ultrasonography remains the modality of choice for the initial study of patients who are suspected of having a MDAs, we propose, in accordance with many authors in the literature, to reserve MRI imaging for patients with a technically inadequate or indeterminate ultrasound examination.

Adolescent↗
PubMed1998

[Magnetic resonance findings in chronic osteomyelitis fistula].

INTRODUCTION: Osteomyelitis is a common inflammatory process caused by an infection which is usually from gram-positive germs. Acute, subacute and chronic forms can be distinguished both clinically and radiographically, each of them presenting different patterns but which are not always easy to recognize. Besides clinical-laboratory data, imaging methods are also useful to make the diagnosis; in chronic forms, MRI has higher sensitivity in recognizing the active foci and the presence of sinus tracts than the other techniques. MATERIAL AND METHODS: We examined nine patients with suspected chronic osteomyelitis with a sinus tract, all of them submitted to radiographic and MR examinations. MRI was performed with a .5 T magnet using a surface coil for joint studies; T1-weighted SE (TR 300-500, TE 20), T2-weighted GE (TR 500-700, TE 20, FA 35 degrees) and FIR sequences with fat suppression (TR 3000, TE 20, TI 100) were performed on the axial, sagittal and coronal planes. Three patients underwent CT too. RESULTS: Radiography showed the osteostructural changes as osteolytic and osteosclerotic areas. CT depicted not only the changes seen radiographically, but also increased bone marrow density. MRI demonstrated active foci of bone marrow appearing as low-intensity areas in T1, with increased intensity in T2 GE and fat-suppressed FIR images; it also depicted the sinus tracts as areas of decreased signal on T1 and of increased signal on FIR images. CONCLUSIONS: Based on our experience and in agreement with the literature data, we believe that MRI is more useful to diagnose the active foci of bone marrow and the sinus tracts in chronic osteomyelitis, especially with T1-weighted SE and fat-suppressed FIR sequences.

Adult↗
PubMedDate not supplied

Adult colocolic intussusception: demonstration by conventional MR techniques.

Intussusception is a rare condition in adults. We report a case of a 69-year-old woman referred to our institution for lower left quadrant abdominal pain, weight loss, and occasional episodes of constipation and rectal hemorrhage. The patient underwent plain radiography, ultrasonography, and magnetic resonance imaging of the pelvis. The final diagnosis was colocolic intussusception due to a neoplastic lead point.

Aged↗