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Biomedical subjects

F Durand

Publications and source records attributed to F Durand.

125 records · Page 7Linked to original sources
PubMed1988

[Cardiac arrest in children. Causes and future after cardiopulmonary resuscitation].

A 24 months retrospective study was carried out to investigate 133 patients with an unexpected cardiorespiratory arrest (CRA). Cardiopulmonary resuscitation (CPR) was undertaken in all cases. 96 patients suffered CRA outside of hospital, 11 patients in the wards of the hospital, and 26 in the pediatric intensive care unit (PICU). Sixty children (44%) responded to initial resuscitation and 20 patients (15%) survived after discharge, 12 (9%) of them with a good neurologic outcome. The best results were obtained in patients with an CRA in the PICU. The results of this study suggest that survival among resuscitated children is not better than that among adults, but can be improved with early recognition and monitoring of children at risk.

Adolescent↗
PubMed1987

[Hemorheological disorders linked to alcoholism].

Haemorheological parameters were studied in 138 alcoholic subjects at different stages of the liver disease, compared to non alcoholic liver diseases and controls. Results showed 1) a decrease in whole blood filterability in the three groups of alcoholic patients associated with a decrease in erythrocyte ATP level, 2) an increase in blood and plasma viscosities, 3) morphological alterations visualized by scanning electron microscopy. These disturbances are correlated to the abnormalities of red cell membrane lipids composition: increase in cholesterol/phospholipids ratio, increase in saturated fatty acids and decrease in polyunsaturated fatty acids (arachidonic and linoleic acids). The responsibility of alcohol itself, in the genesis of these disturbances has been demonstrated by acute alcohol drinking experiments in healthy subjects.

Adenosine Triphosphate↗
PubMed1984

Filtration pressure and red blood cell deformability: evaluation of a new device: erythrometre.

The authors have tested a new device that records the filtration pressure of a suspension of red blood cells (R.B.C.) passing through a 3 micron pore diameter filter. As the flow rate is constant, the pressure increase allows to appreciate an index of the R.B.C. deformability. In order to test the performances of this new equipment, the authors have studied the influence of the variation of the following parameters. Haematocrit from 0.5 to 2%, Buffer composition; time elapsing from drawing to measurement: from hour 0 to hour 3. This analysis has been performed on donors; on packed red cells preserved in CPD, from D0 to D21 and on patients specimens and the results have been compared to the whole blood filtration according to the Reid and Dormandy method. The following parameters were simultaniously measured: Whole blood viscosity by means of a Low Shear 30 viscosimeter, Intraerythrocyte ATP by bioluminescence, Membrane lipid composition (cholesterol, phospholipids), Scanning electron microscopy. This new apparatus, measuring the filtration pressure seems to be a more sensitive and reproductible method allowing to approach the RBC deformability, and quite usefull in clinical haemorheology.

Erythrocytes↗
PubMed1981

Filterability and bank blood conservation media.

A study was made of storage lesions of packed red cells stored in different preservative media: CPD, CPD-adenine, CPD-SAG, and CPD-pentoxifylline. The following chemical and physical parameters were studied: filterability, viscosity, ATP, 2-3,DPG pH, osmotic fragility, scanning electron microscopy pattern, blood gas levels. Tests were performed on days 0, 2, 4, 8, 16 and 24. The number and intensity of storage lesions in vitro give an indication of changes in oxygen-delivery capacity and flow characteristics of erythrocytes over a period of storage at 4 degrees C in different preservative media. CPD was found to maintain pertinent RBC properties up to Day 15. Adding adenine made little difference, whereas adding SAG gave better results. Pentoxifylline did not show appreciable effects in the initial concentrations used, which were close to those employed in medical practice. A preservative mixture ensuring maintenance of normal blood values during storage at 4 degrees C has yet to be found. Continued study of pentoxifylline should be conducted using higher concentrations of this additive.

Adult↗
PubMed1979

[The influence of blood glucose on the filtrability of red cells in diabets. Variations after connection to an artificial pancreas (author's transl)].

In 36 treated diabetics (15 with insulin, 21 with oral hypoglycaemic agents) without any detectable arterial atheromatous lesion, there was a negative correlation between the filtrability of red cells and blood glucose levels (r = - 0.60) on the one hand and, secondly, glycosylated haemoglobin levels (r = - 0.40). In 17 insulindependents diabetics connected to an artificial pancreas, normalisation of blood glucose was accompanied by a concomitant increase in the filtrability of red cells, and improvement of spontaneous platelet agregation. Good control of diabetes would thus appear to be necessary to reduce the incidence of microangiopathy.

Artificial Organs↗
PubMedDate not supplied

A new method for monitoring the sterility of blood donation.

Sterility of blood products is a cardinal contributor to patient safety. Bacteriologic controls of stable products comply with strict regulations, but legislation imposes only limited constraints in the case of perishable products, such as packed red cells (RBCs) or fresh-frozen plasma (FFP). Therefore, it is essential to monitor the sterility of aseptic donations from uninfected donors. Such bacteriologic monitoring can now be carried out through a tertiary bag (containing a soybean casein culture medium) connected to the classical double-pack system. This system does not jeopardize the sterility of the whole system, as the connection is tightly stoppered by a membrane. After the blood drawing, this tertiary bag is filled with 5 ml of blood, and separated from the rest of the system. It is then incubated for 3 days at 30 degrees C and for 14 days at 22 degrees C, to test for eventual bacteriologic or fungal contamination. In order to check the feasibility of this technique, we studied 76 blood drawings in the control laboratory of the blood center, and the results confirm the value of this system.

Blood Transfusion↗
PubMedDate not supplied

Resection of hepatocellular carcinoma: a European experience on 328 cases.

BACKGROUND/AIMS: Surgical liver resection has been demonstrated in Asian countries to be the best therapeutic option in patients with hepatocellular carcinoma. Because the value of this treatment is still debated in Western countries, the aim of this paper was to report a European experience of resection for hepatocellular carcinoma. METHODOLOGY: From 1990 to 1999, 239 men and 61 women aged from 15 to 77 years old underwent 328 resections including major resection in 138 (42%) cases. Normal liver was present in 53 patients (17%) and chronic liver disease was present in 247 including 152 (50%) with cirrhosis. RESULTS: In-hospital mortality was 6.4% and was significantly influenced by the presence of chronic liver disease (1.7% vs. 7.4%). Mortality after resection in alcoholic patients (14%), in patients with hepatitis C (9%) was significantly higher than in patients chronic hepatitis B (1%) (P < 0.05). The overall survival rates were 81%, 57%, 37%, and 13% at 1, 3, 5 and 10 years. Five-year survival rate was significantly higher (P < 0.05) in patients with normal liver as compared to chronic liver disease (50% vs. 34%). In patients with chronic liver disease parameters, which significantly influenced survival rate, were vascular invasion, tumor differentiation and the extent of resection. CONCLUSIONS: In this European study with varied profile of etiologies associated with hepatocellular carcinoma we showed that a five-year survival rate of 40% can be expected after resection and that chronic liver disease is a major factor influencing short and long-term prognosis.

Adolescent↗
PubMedDate not supplied

[Rothmund-Thomson syndrome, trisomy 8 mosaicism and RECQ4 gene mutation].

BACKGROUND: We report a case of Rothmund-Thomson syndrome associated with a trisomy 8 mosaicism, and RECQ4 gene mutation. OBSERVATION: An 18-year-old man presented with a poikiloderma affecting photoexposed areas and the buttocks. This lesions appeared during the first year of life and was secondly associated with alopecia, sparse body hair, keratosis, and warts. He also had proportional short stature, thumb and patella aplasia, particular facies, and plantar malformations. Cytogenetic studies evidenced chromosomal instability and trisomy 8 mosaicism. The DNA repair capacity was normal. A mutation in RECQ4 helicase gene was found. DISCUSSION: Rothmund-Thomson syndrome is a rare hereditary syndrome characterized by early onset of poikiloderma. Patients exhibit variable features including skeletal abnormalities, juvenile cataracts, photosensitivity, and a higher than expected incidence of cutaneous or extracutaneous malignancies. Genetic patterns found in Rothmund-Thomson syndrome are heterogeneous. Normal karyotypes have been demonstrated in many patients. Various karyotypic abnormalities or reduced DNA repair was seen in others. Recently, five patients with Rothmund-Thomson syndrome were shown to segregate for mutations in RECQ4 helicase gene. Thus, clinical and genetic features in Rothmund-Thomson syndrome are polymorphous. Therefore, it could be interesting to correlate genotype and phenotype.

Abnormalities, Multiple↗
PubMedDate not supplied

[Erythrocytes and alcohol: hemorheologic manifestations of alcoholism].

Hemorheological parameters were studied in 218 subjects: 129 alcoholic liver diseases, 19 alcoholic patients without liver damage, 20 liver diseases without alcoholism and 50 controls. Whole blood filtration (WBF) is significantly decreased in the group of alcoholic patients; whole blood and plasma viscosity are increased in the groups of alcoholic patients as well as in the group of non alcoholic liver diseases. The liver damage seems not to be a determining factor to the genesis of filterability impairment. Alcohol and/or one of its metabolites induce erythrocytes morphological alterations (scanning electro-microscopy) correlated with some alterations of the RBC membrane lipids content (increased cholesterol/phospholipids ratio). It is suggested that these hemorheological patterns must be discussed in cases of alcoholic liver diseases as well as in following up alcohol withdrawal.

Adenosine Triphosphate↗
PubMedDate not supplied

[Study of plasma androstenedione and testosterone levels in hypercorticism syndromes].

Plasma T and A were studied in 10 patients with hypercorticism. In the female patients, plasma A and T were elevated in 4 cases of Cushing's disease, slightly decreased in 2 cases of adrenal adenoma and greatly increased in I case of adrenal carcinoma. In 3 male patients, A plasma levels followed ACTH levels, but T was subnormal, irrespective of the cause of hypercorticism. Furthermore, in 8 normal men, the decrease of plasma T, observed after ACTH administration, was not directly related to ACTH, but rather to cortisol, as it was not observed after metyrapone induced ACTH increase. As no change in LH secretion was shown and as dexamethasone reduced the testosterone response to HCG, it seems likely that glucocorticoids act directly on testosterone biosynthesis.

Adrenal Cortex Neoplasms↗