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Biomedical subjects

D Matter

Publications and source records attributed to D Matter.

At least 19 recordsLinked to original sources
PubMed2002

[Sonographic imaging of lymphatic vessels compared to other methods].

This paper reviews for the first time the normal and abnormal appearances of lymphatic channels of the skin using ultrasound. After a review of anatomy and histology, the authors present the current imaging modalities available for lymph vessel imaging. The ultrasound examination is presented with a description of the author's technique as well as the technical requirements of the ultrasound unit (12 MHz linear probe with a resolution of 400 microns). They present the ultrasound appearance of normal lymphatic channels and their relationships to the dermis, hypodermis and lymph nodes, and at last the ultrasound appearance of abnormal lymphatic pathways

Contrast Media↗
PubMed2002

[Basic sonographic interpretation].

Basic sonographic semiology includes the dots and lines that are the basic constituants of ultrasound images and the different structures that are the sonographic representation of the different tissues (fluid, fat, calcifications and stones, air, parenchyma). Knowledge of these basic interpretative skills is mandatory to the clinical practice of sonography and allows understanding of the different sonographic manifestations of pathologic processes and identification of artifacts and pitfalls.

Child↗
PubMed2000

Exposure to pulsed high-frequency electromagnetic field during waking affects human sleep EEG.

The aim of the study was to investigate whether the electromagnetic field (EMF) emitted by digital radiotelephone handsets affects brain physiology. Healthy, young male subjects were exposed for 30 min to EMF (900 MHz; spatial peak specific absorption rate 1 W/kg) during the waking period preceding sleep. Compared with the control condition with sham exposure, spectral power of the EEG in non-rapid eye movement sleep was increased. The maximum rise occurred in the 9.75-11.25 Hz and 12.5-13.25 Hz band during the initial part of sleep. These changes correspond to those obtained in a previous study where EMF was intermittently applied during sleep. Unilateral exposure induced no hemispheric asymmetry of EEG power. The present results demonstrate that exposure during waking modifies the EEG during subsequent sleep. Thus the changes of brain function induced by pulsed high-frequency EMF outlast the exposure period.

Adult↗
PubMed1992

Work and family. Competing demands affecting worker well being.

1. As employed women juggle the responsibilities of employment and family caregiving, many experience stress and fatigue from the competing demands on their time and energy. 2. Evidence suggests that perceptions are changing about the institutional relationships between families, government, and the economy, and the value society places on caregiving activities. 3. The pending Family and Medical Leave Act represents one of the broadest social remedies proposed to address the problems of the work-family interface. But, in the absence of federal and state policies, employers can fill the void with private policies and programs that meet employees' needs. 4. A variety of options exist to create a more "family friendly" work environment. Occupational health nurses can play an important role in supporting and implementing family friendly initiatives at the workplace.

Adult↗
PubMed1990

[Contribution of echography to the diagnosis of cancer of the exocrine pancreas. Pitfalls and limits. Results of guided biopsy].

The importance of ultrasound in the diagnosis of primary pancreatic adenocarcinoma is due to the wide use of ultrasound as a first diagnostic modality in the case of abdominal problems, immediately after the physical examination. The results of the ultrasound examination allow the physician to choose the best way to explore the pancreas further (CT, pancreatography, angiography, MRI). The technical quality of the ultrasound examination is mandatory and the radiologist must be able to recognize its insufficiencies. The pancreatic adenocarcinoma is difficult to see with ultrasound: infiltration, ill-defined borders and echopattern; the lymph node or metastatic involvement is frequent and remains a good diagnostic sign. Many pitfalls can be attributed to this technique; the variations of the normal anatomy, the diversity and variable appearance of pancreatic lesions and the association with pancreatitis. The US-guided puncture represents a way to limit the use of diagnostic exploratory laparotomy.

Adenocarcinoma↗
PubMed1988

[Ultrasonically-guided diagnostic punctures in pancreatic and adrenal diseases].

This study is based on the results of 38 punctures of adrenal and 62 punctures of pancreatic lesions measuring 1.5 to 12 cm (mean size: 4 cm in the pancreas; 6.5 cm in the adrenal glands). We used a free-hand technique with a mechanical sector probe. In the pancreas, the sensitivity of cytology is 67%, the specificity 100%. This low sensitivity is due to the difficulty in obtaining an adequate specimen when the tumor is predominantly fibrous. In the adrenal glands, the sensitivity is 90% and the specificity 100%. The results of our study are comparable to other series of guided punctures with US or CT reported in the literature. Microbiopsies with cutting needles can increase the sensitivity of the method in case of pancreatic tumors.

Adrenal Gland Diseases↗
PubMed1987

Pancreatic duct: US-guided percutaneous opacification.

Percutaneous pancreatography was attempted in 28 patients. In 18 cases, the examinations were performed after failure of endoscopic retrograde cholangiopancreatography (ERCP); in ten patients, ERCP was not attempted. Under real-time ultrasonic guidance, a 22-gauge needle was inserted into the pancreatic duct, which ranged in size from 3 to 15 mm. After aspiration of pure pancreatic juice, 10-20 ml of contrast medium was injected under fluoroscopic control. The examination was successful in 25 patients. The only significant complication was bile leakage in a patient with obstructive jaundice. Of the six patients who subsequently underwent surgery, evidence of the puncture site was present in only one.

Humans↗
PubMed1987

A suprasternal approach to the mediastinum using real-time ultrasonography. Echoanatomical correlations.

This work was undertaken in order to define the potential capabilities of real-time echography for the exploration of the mediastinum by a suprasternal approach. We present the results of a comparative study between anatomical frontal oblique sections of the mediastinum and echographic slices performed along the same planes from the suprasternal fossa. From these data, it seems possible to enlarge the applications of echography in the study of mediastinal pathology.

Adult↗
PubMed1983

[Diffuse superficial nephroblastomatosis. Chemotherapy. 1 case].

A case of superficial diffuse nephroblastomatosis involving both kidneys in a 14-months old child is reported. Urographic and arteriographic results as well as the still little-known ultrasonographic images made it possible to determine pre-operatively the nature of the tumour and to exclude the initial diagnosis of Wilm's tumour. A relatively non-aggressive chemotherapy resulted in complete involution of the subcapsular tumoral envelope. The close embryogenic and oncogenic relationship between nephroblastoma and nephroblastomatosis is recalled.

Dactinomycin↗
PubMed1983

[Transcutaneous wirsungography under echoscopic control].

Two cases of contrast radiography of Wirsung's canal performed by direct percutaneous puncture of the canal under ultrasonic control are reported. The exploration was well tolerated by the patients. This method appears to be of considerable interest in liver and pancreas diseases, being reliable and providing valuable information.

Adult↗
PubMed1983

[Echographic study of the normal adrenal gland during development and in the adult].

An echographic study of the normal adrenal glands is realized on normal out patients, and anatomic slices. A comparison is made between echographic and anatomic images. This study demonstrates the image of the normal adrenal gland in the fetus, newborn and adult, and reveals a different echo pattern in the cortex (sonolucent) and the medulla (echogenic).

Adrenal Cortex↗