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C Baunin

Publications and source records attributed to C Baunin.

At least 19 recordsLinked to original sources
PubMed2005

[Unusual association of chylopericardium and aortic hypoplasia in a neonate].

We report the case of a neonate with two very rare anomalies: primary chylopericardium and diffuse hypoplasia of the thoraco-abdominal aorta. The presentation on the 16th post-natal day was with dyspnoea and refusal to feed. The initial clinical examination revealed hepatomegaly and weak femoral pulses. 2D ultrasound gave a diagnosis of a large compressive pericardial effusion combined with moderate hypoplasia of the aortic isthmus. Emergency pericardial drainage removed 80ml of chylous liquid. Following prolonged parenteral nutrition, the pericardial effusion stabilised. A mechanism of diffuse vascular disease affecting the aorta and the lymphatic system is suggested.

Aorta, Abdominal↗
PubMed2003

Long-term effects on tibial growth after intraosseous infusion: a prospective, radiographic analysis.

BACKGROUND: Evaluate, by radiographic analysis, tibial growth after an intraosseous infusion (IOI) in a pediatric population. METHODS: We performed a prospective simple blind study, between January 1, 1994, and July 1, 2001, which included pediatric patients who needed an intraosseous trocar in emergency situations. During the follow-up, roentgenographs were performed. On each radiologic view, different measurements were carried out: anterior and lateral tibial length, anterior and lateral width at 2 diaphyseal levels. We compared the anterior length values to those published in the Anderson et al tables. When only one tibia was punctured, the mean measurements were compared with the control leg measurements using a paired t test. RESULTS: The initial population included 78 patients. Of these 78 subjects, 42 died, 10 families could not be contacted, and one refused to participate. Two children were excluded because they had other conditions that could influence tibial growth. The study included 23 children. The puncture site was the proximal tibia. The mean age was 18.6 months at the time of IOI, the mean time of infusion was 5 hours, and the mean perfused volume was 225 mL. The mean radiologic follow-up time was 29.2 months. When compared with the Anderson et al tables, all the anterior length values were within the 95% confidence interval. For the other measurements, the statistical analysis showed no significant difference between punctured and control legs. CONCLUSION: There is no long-term effect on tibial growth after an IOI when the IO trocar is properly placed.

Age Determination by Skeleton↗
PubMed2002

Personalised mechanical properties of scoliotic vertebrae determined in vivo using tomodensitometry.

This in vivo study investigated the mechanical properties of apical scoliotic vertebrae using computed tomography (CT) and finite element (FE) meshing. CT examination was performed on seven scoliotic girls. FE meshing of each vertebral body allowed automatic mapping of the CT scan and the visualisation of the bone density distribution. Centroids and mass centres were compared to analyse the mechanical properties distribution. Compared to the centroid, the mass centre migrated into the concavity of the curvature. The three vertebrae of a same patient had the same body migration behaviour because they were located at the curvature apex. This observation was verified in the coronal plane, but not in the sagittal plane. These results represent new data over few geometrical analyses of scoliotic vertebrae. Same in vivo personalisation of mechanical properties should be performed on intervertebral discs or ligaments to personalise stiffness properties of the spine for the biomechanical modelling of human torso. Moreover, do this mechanical deformation of scoliotic vertebrae, that appears before the vertebral wedging, could be a predictive tool in scoliosis treatment?

Child↗
PubMed2002

[Intermittent ureteropelvic junction obstruction and aberrant vessel to the lower pole of the kidney in children].

Intermittent ureteropelvic junction obstruction in children is a distinct clinical syndrome, it is often associated with an anteriorly crossing aberrant vessel to the lower pole of the kidney. The presence of these vessels increases the risk of complication and requires surgical management. CT scan is already the best exam to find these vessels in adults before treatment. It seems to be also efficient in children. This case report illustrates this indication.

Child↗
PubMed2002

[Value of MR imaging of the fetal kidney].

Sonography is the imaging modality of choice for initial evaluation of the fetus. However, the role of MR imaging for fetal evaluation is expanding. Based on a review of seven cases, the role of MRI to further characterize renal abnormalities detected at US, especially hyperechoic kidneys, is demonstrated.

Female↗
PubMed2002

In vivo quantitative analysis of scoliotic vertebrae.

An in vivo method based on CT images and finite element meshing had been developed to quantify and visualize the bone density distribution of scoliotic vertebrae. CT examination (axial acquisition of the apical, superior and inferior adjacent vertebral bodies) had been performed on seven girls presenting an idiopathic scoliosis. Using an in-house image processing software and the pre-post processor Patran, a surfacic finite element mesh of each body slice was proposed allowing an automatic mapping of the cancellous bone slices and a volumic mesh for the bone density distribution visualization. In the coronal plane, compared to the body geometrical centre, the body mechanical centre was shifted forward in the concavity of the curvature for six patients and in the convexity for one patient. For each patient, this shift forward was made in a same way for the three vertebrae. In the sagittal plane, the body mechanical inertia centre was shifted forward in the posterior side for 12 vertebrae, in the anterior side for 3 vertebrae and was not shifted forward for 6 vertebrae. This shift forward was made in the anterior side for the inferior adjacent vertebra. The shift forward by slice was made in a same way for each slice, excepted at the end plates. Besides, one can observe that the scoliotic deformation evolution seemed to modify the mechanical property distribution. The results may also suggest predictive criteria of evolution of the scoliotic deformities.

Adolescent↗
PubMed2001

Tomodensitometry measurements for in vivo quantification of mechanical properties of scoliotic vertebrae.

OBJECTIVE: This in vivo study investigated the mechanical properties of scoliotic vertebrae especially in the apical zone. DESIGN: A method based on computed tomography images and finite element meshing had been developed to quantify and visualise the bone density distribution of scoliotic vertebrae. BACKGROUND: Most of scoliotic studies performed considered only geometrical parameters. METHOD: Computed tomography examination had been performed on 11 girls presenting idiopathic scoliosis. Using in-house image processing software and the pre-post processor Patran, a finite element mesh of each vertebral body and a mapping of each cancellous bone slice were proposed allowing the bone density distribution to be visualised. The mechanical properties were derived from predictive relationships between Young's modulus and computed tomography number. Geometrical (unit mass) and mechanical centres were calculated and compared in order to quantify the role of mechanical property distribution on the apex zone of the scoliotic spine. RESULTS: In the coronal plane, compared to the geometrical centre, the mechanical centre was shifted forward in the concavity (0.54 mm) of the curvature except for two vertebrae. In the sagittal plane, the mechanical centre was shifted forward in the back (0.26 mm) except for three vertebrae. The shift forward by slice was made in a same way for each slice (0.63 mm), except at the end plates (0.58 mm). DISCUSSION: The result values obtained were small but significant because the curvatures were low and the vertebrae were not wedged. Besides, one can observe that the scoliotic deformation evolution seemed to modify the mechanical property distribution. RELEVANCE: This study suggested the following question: Could these CT measurements be a predictive tool in scoliosis treatment?

Child↗
PubMed2001

[Imaging of the hip in healthy children in MRI: evaluation of the acetabular coverage].

PURPOSE: To define with MR imaging a reference value for acetabular coverage on coronal and sagittal images for a population of healthy children. MATERIALS AND METHODS: 36 children (72 hips) where prospectively studied over 1 year. T1-weighted spin-echo images in both coronal and sagittal planes were obtained. Slice thickness was 4 mm. Measurement of acetabular coverage (AHI: Acetabular-Head Index) was made in both planes with two different landmarks: bone and cartilage. Study of the evolution with age was made. RESULTS: The acetabular coverage is symmetrical and decreases with age. Its measurement is reproducible. CONCLUSION: This study shows that measurement of acetabular coverage (AHI) is easily obtained at MR imaging and is reproducible. We suggest 83 (mean 1SD) as the inferior limit for AHI based on cartilage measurements. We introduce sagittal values, never published. We believe that MR, by its ability to demonstrate the cartilaginous surfaces, will play a major role in the true understanding of the anatomical relationship between the femoral head and the acetabulum.

Acetabulum↗
PubMed2000

Mesoblastic nephroma: prenatal ultrasonographic and MRI features.

Antenatal detection of mesoblastic nephroma by US is possible. Reviewing the literature, we found 19 previously reported cases, only 1 of which underwent prenatal MRI. We present a further case diagnosed by US and confirmed with MRI. The imaging findings and differential diagnoses are discussed. Early and correct detection of this rare entity is of great interest, as it may facilitate prevention and management of severe obstetric and neonatal complications such as polyhydramnios and prematurity. MRI can help to evaluate the origin and the morphological features of a fetal abdominal mass.

Adult↗
PubMed2000

[Thoracic ultrasound].

Ultrasound exploration of the thorax is a very useful imaging method in children. For adults, it is useful for pleural effusion, study of the diaphragm and to guide percutaneous puncture of targeted pleuro-parietal, mediastinal or peripheral parenchymal sites. Thoracic ultrasound remains underused, particularly as a bedside exploration technique or in emergency or intensive care situations.

Adult↗
PubMed1999

Assessment of hindfoot deformity by three-dimensional MRI in infant club foot.

In 12 infants aged under 16 months with unilateral club foot we used MRI in association with multiplanar reconstruction to calculate the volume and principal axes of inertia of the bone and cartilaginous structures of the hindfoot. The volume of these structures in the club foot is about 20% smaller than that in the normal foot. The reduction in volume of the ossification centre of the talus (40%) is greater than that of the calcaneus (20%). The long axes of both the ossification centre and the cartilaginous anlage of the calcaneus are identical in normal and club feet. The long axis of the osseous nucleus of the talus of normal and club feet is medially rotated relative to the cartilaginous anlage, but the angle is greater in club feet (10 degrees v 14 degrees). The cartilaginous structure of the calcaneus is significantly medially rotated in club feet (15 degrees) relative to the bimalleolar axis. The cartilaginous anlage of the talus is medially rotated in both normal and club feet, but with a smaller angle for club feet (28 degrees v 38 degrees). This objective technique of measurement of the deformity may be of value preoperatively.

Calcaneus↗
PubMed1998

Diagnostic approach to mediastinal masses.

Mediastinal masses represent a vast group of tumours and pseudo-tumours which can involve the various compartments of the mediastinum. The authors propose a radiologic diagnostic approach starting from the plain thoracic radiograph with study of the mediastinal lines and oesophageal transit and going on to the classifications made possible by modern CT and MR imaging. The proposed diagnostic procedure is based on nine mediastinal lines and two 'threads of Ariadne' which are the compartments where the masses are located and their behaviour at CT (densitometry before and after administration of an iodinated bolus) and at MRI (T1, T2, gadolinium-enhanced T1-weighted sequences). The definitive aetiological diagnosis may be established by surgery, but also in certain cases by percutaneous needle biopsy.

Absorptiometry, Photon↗
PubMed1998

[Autoimmune hemolytic anemia associated with a mature ovarian teratoma].

UNLABELLED: The association of autoimmune hemolytic anemia and mature teratoma of the ovary is rare, particularly in childhood, but must be known and looked for since the treatment of teratoma allows to cure anemia as well. CASE REPORT: A 9 year-old girl was admitted for hemolytic anemia. The etiologic work-up revealed an autoimmune mechanism (IgG autoantibodies with complement), as well as an ovarian tumor after ultrasound sonography of the abdomen and pelvis. Surgical excision of the tumor was complete and uncomplicated. Pathological examination concluded to a mature teratoma. Anemia, as well as the signs of autoimmunity, disappeared a few weeks later and the child is doing well with several months of follow-up. CONCLUSION: This second reported pediatric case shows that an ovarian teratoma should be searched for with ultrasound sonography in any girl presenting with autoimmune hemolytic anemia, since surgical excision is sufficient to cure both anemia and the tumor.

Anemia, Hemolytic, Autoimmune↗