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Biomedical subjects

P Netter

Publications and source records attributed to P Netter.

At least 307 records · Page 17Linked to original sources
PubMed1982

[Unwanted pregnancy as a cause of child development disorders?].

Relationships between unwanted pregnancies and behavioural disturbances in the infant were analyzed in 6117 pregnancies examined within a prospective multicenter collaborative study on pregnancy and child development. Prior to analyzing their consequences, correlates and causes of undesired pregnancy liable to operate as confounding factors by exerting direct influences on disturbances in the fetus or newborn were identified. This was achieved by stratification of the total group according to variables of obstetric history relevant to desire of pregnancy. Although not only social factors but also psychoneurotic behaviour was found to be partly responsible for rejection of pregnancy, it could be demonstrated that none of these factors unfavourably influenced physical health or psychomotor development of the infant, but merely seemed to show a few associations with the infant's aggressive or regressive tendencies at the age of 18 or 36 months.

Child Behavior Disorders↗
PubMed1982

Inflammatory effect of aluminium phosphate on rat paws.

The aim of this experiment was to determine the inflammatory effect of aluminium phosphate on the rat paw and to compare it with those of carrageenan, calcium hydrogen phosphate dihydrate and natural diamond powder. At the probability threshold of the various tests used there was a significant increase in volume of the treated paw relative to the control paw for all the substances at all times, except for the two concentrations of diamond (effect no longer significant from 30 min on), of calcium phosphate (not significant from 2 h), and of aluminium phosphate (not significant from 24 h). The effects were not significantly different between diamond and calcium phosphate (both concentrations). The effects of aluminium phosphate were significantly different from those of the two until at least 2 h after the injection ; there was no significant difference between the two doses of this substance. The kinetics of the effects produced by carrageenan differed from the kinetics of the other materials, its effects were not significantly different from those produced by aluminium phosphate until 2 h and later. The inflammatory effect that we have demonstrated in this study is added information suggesting that in addition to apatite, calcium pyrophosphate dihydrate, and sodium monourate, aluminium compounds can play a role in the unexpected appearance of inflammatory manifestations in haemodialysed patients with chronic renal insufficiency treated with aluminium gels.

Aluminum Compounds↗
PubMed1982

[Measurement of aluminium in bone by pulse polarography (author's transl)].

Pulse polarography has been applied to the determination of aluminium in bone. The sensitivity, selectivity and reproducibility of the method are described. The results of bone aluminium concentrations in controls and in haemodialysed patients treated with aluminium compounds are discuted. Pulse polarography permits very precise measurements of aluminium impregnating bone.

Adult↗
PubMed1982

[Protein binding of salicylates in rheumatoid arthritis].

Protein binding of salicylates was determined in 16 control subjects and 27 patients suffering from rheumatoid arthritis. Results obtained after separation of the free and bound fractions by dialysis to equilibrium and measured by spectrofluorometry were analyzed using a new mathematical model. In correlation with the decrease in plasma albumin concentrations, a decrease was found in the protein binding of salicylates in patients with rheumatoid arthritis. This phenomenon was less marked in therapeutic zones and was related to the degree of severity of the inflammatory syndrome. The binding capacity per albumin molecule at saturation was decreased in patients suffering from advanced forms, suggesting that the changes seen were not due solely to quantitative variations in serum albumin levels. This study confirms the value of the determination of free salicylate levels in patients suffering from inflammatory rheumatic disorders.

Adolescent↗
PubMed1982

Detection of aluminum by LAMMA spectrometry in plasma and in synovial liquids of patients on chronic dialysis.

The LAMMA (Laser Microprobe Mass Analysis) provides a semi quantitative analysis of mineral and organic ions. This microprobe has been applied in determining the aluminum detection threshold in sera or in synovial fluid of patients on chronic dialysis whose treatment includes some aluminum compounds. The limit of aluminum detection in a lyophilised sera is about 4 ppm that allows to expect on equivalent threshold in biological in heterogous matrices.

Aluminum↗
PubMed1982

Apatites in heterotopic calcifications.

Calcified material obtained from three patients suffering from calcifications of the shoulder tendon sheath and from a subcutaneous with calcinosis was studied. A panel of different techniques was applied to this study: scanning electron microscopy, X-ray diffraction, infrared spectrometry, scanning and transmission wavelength dispersive X-ray spectrometry, high resolution transmission electron microscopy and electron microdiffraction. These calcifications, made of carbonate containing apatite, are heterogeneous and composed of at least two separate phases the crystallinity of which appear different.

Apatites↗
PubMed1981

Increased pyrophosphate in fibroblasts and lymphoblasts from patients with hereditary diffuse articular chondrocalcinosis.

The metabolic and genetic factors leading to deposition of calcium pyrophosphate crystals in cartilage of patients with chondrocalcinosis are not well understood. Analysis of cultured fibroblasts and lymphoblasts from 12 affected members of a large kindred showed a mean concentration of intracellular inorganic pyrophosphate two times greater than that in cells from unaffected family members or normal, unrelated volunteers. Increased intracellular pyrophosphate may, therefore, be a biochemical marker for the heterozygous expression of the chondrocalcinosis gene.

Cells, Cultured↗
PubMed1981

Evidence of a generalized metabolic defect in patients with hereditary chondrocalcinosis. Increased inorganic pyrophosphate in cultured fibroblasts and lymphoblasts.

A gene in the heterozygous state appears responsible for a 2-fold increase in pyrophosphate content of both fibroblasts and lymphoblasts cultured from patients who have dominantly inherited chondrocalcinosis. Cells from unaffected family members of this large kindred showed a pyrophosphate content in the same range as was found in unaffected, unrelated controls. Similar cells from individuals homozygous for the gene would be useful in delineating the precise biochemical abnormality responsible for the increased pyrophosphate content.

Adult↗
PubMed1981

[A controlled clinical trial for testing the efficacy of the homeopathic drug eupatorium perfoliatum D2 inthe treatment of common cold (author's transl)].

53 outpatients suffering from common cold (flu) were randomly assigned to either a therapy with acetylsalicylic acid (ASA) or the homeopathic drug Eupatorium perfoliatum D2 in a controlled clinical trial. The efficacy of the drugs was assessed on day 1, 4 and 10 of the infection by symptom check lists and physical examinations. Neither subjective complaints nor body temperature or laboratory findings showed any significant differences between groups which was taken as evidence that both drugs were equally effective.

Aspirin↗
PubMed1980

Radionuclide imaging in hip abnormalities.

The uptake of Tc-99m-diphosphonate was studied topographically and quantitatively on 258 diseased hips. For many diseased hips, bone scintigraphy provides items of information that complement the clinical, radiological, and biological data, with which it should always be compared. The localization, extent, and intensity of the uptake differ greatly according to the hip disorder studied, and depend not only on the cause of the lesion but also on its stage of evolution. Bone scintigraphy can shed light on the etiologic diagnosis of a painful hip at the beginning of its evolution, before definite roentgenographic signs appear, thanks to some very precise characteristics of the uptake, this is the case for transient osteoporosis of the hip, aseptic osteonecrosis, Legg-Perthes disease, early arthritis of the hip joint, and stress fractures of the femoral neck or of the pubic rami.

Adult↗
PubMed1980

[Bf groups in ankylosing spondylitis].

The phenotypes Bf were studied in 50 patients (42 men and 8 women) with definite ankylosing spondylitis and in certain of their relatives. The alleles BfF and BfS were most frequently encountered and the rare allele BfF1 in one case only. There may exist a preferential transmission of the haplotype HLA B27- Bf S. In 11 patients without B27 antigen, the distribution of the phenotypes was similar to that in a control group. It is probable that the locus Bf cannot be used as a preferential marker for ankylosing spondylitis.

Complement Factor B↗
PubMed1980

Scanning electron microscopic study of microcrystals implicated in human rheumatic diseases.

Scanning electron microscopy has been used in conjunction with wavelength dispersive X-Ray spectroscopy and in correlation with X-Ray diffraction to define the populations of crystals present in rheumatic diseases. Microcrystals of monosodium urate, triclinic and monoclinic calcium pyrophosphate dihydrate, apatite, calcium hydrogen phosphate dihydrate and corticosteroids, among others, have been found in synovial fluid, in the intraarticular tissues (fibrocartilage, cartilage, and synovial membrane), and in the periarticular tissues (tendons and ectopic calcifications). Scanning electron microscopy in conjunction with wavelength dispersive X-Ray spectroscopy has made it possible to detect microcrystals, even isolated, to describe their morphologies, and to study their relations with the cells of the synovial fluid and with the collagenous and cellular structures of the synovial membrane and of the cartilage. It cannot replace X-Ray diffraction for the conclusive identification of microcrystals, but it can certainly help to improve the analysis of the various populations of crystals present in articular and periarticular rheumatic diseases.

Arthritis, Rheumatoid↗
PubMed1980

[Drug monitoring: psychological methods (author's transl)].

Drug related mental and psychophysiological disturbances may be assessed by the same instruments of observation, ratings and self-ratings used for assessment of the efficacy of psychotropic drugs. Several possible sources of bias, however, concerning survey design, sample selection and evaluation and interpretation of data on adverse drug reactions have to be identified by careful documentation in order to exclude confounding factors, such as type and severity of treated and additional diseases, external events, personal factors in perception of symptoms by patient and physician.

Humans↗