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H Michels

Publications and source records attributed to H Michels.

68 records · Page 4Linked to original sources
PubMed1980

[MCTD (Sharp) syndrome in childhood (author's transl)].

Clinical course and prognosis of children with MCTD-Syndrome are described and six own cases are compared with the cases reported by other authors. The immunological and histological findings would seem to confirm the independence of the disease or, at least, reveal it as a particular clinical course of other connective tissue diseases. On the other hand, the initial conception, that the course of the disease can be viewed as favourable on account of the absence of kidney and CNS findings, must not be reevaluated according to our experiences of the last few years. This applies particularly to the cases of MCTD in childhood, since authors in the U.S.A. have, in the meantime, reported instances of death. One patient in our own hospital was diagnosed through biopsy as having a severe membrano-proliferative glomerulonephritis, another patient has had a severe myo-pericarditis in 1978.

Child↗
PubMed1978

Determination of chromium and cobalt in human serum by neutron activation analysis.

Confusion exists about the chromium and cobalt concentrations in the serum of healthy individuals. We determined these elements by neutron activation analysis. The samples were irradiated during 12 days at a flux of approximately 10(14) neutrons.cm-2.s-1. Chromium was selectively separated by distillation after the irradiation. We obtained the following values (mean +/- standard deviation): 0.160 +/- 0.083 mug/liter for chromium, and 0.108 +/- 0.060 mug/liter for cobalt.

Blood↗
PubMed1977

Differences in the binding of drugs to plasma proteins from newborn and adult man. II.

The binding of certain drugs to isolated fractions of plasma proteins obtained from newborn and adult man has been studied by equilibrium dialysis. For thiopental, desipramine, nitrofurantoin, sulfamethoxydiazine, meticillin and salicylic acid no difference was found between binding to the albumin fraction from newborns and adults. However, for thiopental, desipramine and promethazine binding to the globulin fraction was smaller in the newborns than in adults. Addition of bilirubin to the albumin fraction decreased the binding of nitrofurantoin, sulfamethoxydiazine and meticillin. No difference in the binding of meticillin to the albumin or globulin fractions from newborns and adults was found. The binding decreased, however, if both fractions were combined. Four mechanisms to explain the difference in binding between newborns and adults are discussed: (1) Displacement of drugs by bilirubin, (2) different binding properties of cord and adult albumin, (3) different properties of the globulins and (4) interaction of albumin with globulins in the newborn.

Adult↗
PubMed1977

Simultaneous determination of iron, zinc, selenium, rubidium, and cesium in serum and packed blood cells by neutron activation analysis.

We determined the iron, zinc, selenium, rubidium, and cesium concentrations in serum and packed blood cells by instrumental neutron activation analysis without chemical separations. Lyophilized samples were irradiated for 12 days at a flux of 10(13) neutrons-cm-2-s-1, mineralized by wet digestion, and measured two times with a high-resolution Ge(Li) detector--for 6 h about a month after the irradiation and for 15 h two or three months after the irradiation, The following values were obtained: 163 +/- 0.43 mg/liter (serum iron), 1025 +/- 136 mg/kg wet wt (packed cells iron), 1¿ +/- 0.20 mg/liter (serum zinc), 11.15 +/- 1.83 mg/kg wet wt (packed cells zinc), 0.13 +/- 0.02 mg/liter (serum selenium), 0.16 +/- 0.03 mg/kg wet wt (packed cells selenium), 0.17 +/- 0.04 mg/liter (serum rubidium), 4.28 +/- 0.98 mg/kg wet wt (packed cells rubidium), 0.74 +/- 0.20 microgram/liter (serum cesium), and 4.82 +/- 2.10 microgram/kg wet wt (packed cells cesium).

Blood Cells↗
PubMedDate not supplied

[Differentiation of juvenile chronic arthritis--diagnostic significance of HLA associations].

From January 1980 to June 1982, 150 children with primary onset of a joint disease during the previous 6 months were entered into a prospective non-randomized observation study. 106 of the 150 children were diagnosed as juvenile chronic arthritis cases according to the EULAR-criteria. Nine children of this group belonged to the systemic subgroup (7 girls, 2 boys). HLA-typing was performed in 100 of the 106 children: HLA-B27 was evident in the total patient group with significantly increased 41% versus 8.9% of the control group. This antigen is significantly evident in all subgroups with variously increased frequency, except in the systemic and early-onset (pauciarticular) subgroups; the frequency in the rheumatoid-factor-negative polyarticular type of juvenile chronic arthritis (JCA) was 37.9%, in the rheumatoid-factor-positive polyarticular form 33.3%, and in the oligoarthritis/sacroiliitis-group 72.2%. DR5 was significantly present in the total patient group with 32% (control group 13.4%) and in the early-onset oligoarthritis group (43.7%). The rheumatoid-factor-positive (50%) and negative polyarticular group (31%) showed a pronounced slightly significant increase.

Adolescent↗
PubMedDate not supplied

[Chronic juvenile arthritis--difficult early diagnosis--differentiation of arthropathies in the patient case load of a juvenile arthritis hospital].

Among 2369 children who had been admitted and treated in the Rheumatic Children's Hospital Garmisch-Partenkirchen between 1952 and 1979 under the diagnosis "juvenile chronic arthritis (JCA)" or, "collagenosis", there were 244 patients (= 10.3%) for whom in the end a different diagnosis was set. The major part of these children suffered from arthritides where there was proof of a direct or an indirect connection with bacterial infections or where there existed a corresponding suspected diagnosis (altogether 162 out of these 244 children, = 66.4%). The remaining 82 cases differentiated into 26 further diagnoses with various frequencies. Our examinations show that six criteria are found relatively frequently in arthropathies not caused by juvenile chronic arthritis. These require special consideration in the differential diagnosis: oligoarthritic onset of the disease, high fever - especially septic intermittent fever, erythema nodosum, endomyocarditis, no (or only very slight) functional resp. morphological changes of the joints.

Arthritis, Infectious↗
PubMedDate not supplied

The German version of the Childhood Health Assessment Questionnaire (CHAQ) and the Child Health Questionnaire (CHQ).

We report the results of the cross-cultural adaptation and validation into the German language of the parent's version of two health related quality of life instruments. The Childhood Health Assessment Questionnaire (CHAQ) is a disease specific health instrument that measures functional ability in daily living activities in children with juvenile idiopathic arthritis (JIA). The Child Health Questionnaire (CHQ) is a generic health instrument designed to capture the physical and psychosocial well-being of children independently from the underlying disease. The German CHAQ was fully validated with 3 forward and 3 backward translations, while the CHQ has already been published and therefore it was revalidated. A total of 197 subjects were enrolled: 142 patients with JIA (5% systemic onset, 13% polyarticular onset, 8% extended oligoarticular subtype, and 74% persistent oligoarticular subtype) and 55 healthy children. The CHAQ clinically discriminated between healthy subjects and JIA patients, with the polyarticular and extended oligoarticular subtypes having a higher degree of disability, pain, and a lower overall well-being when compared to their healthy peers. Also the CHQ clinically discriminated between healthy subjects and JIA patients, with the polyarticular onset and extended oligoarticular subtypes having a lower physical and psychosocial well-being when compared to their healthy peers. In conclusion the German versions of the CHAQ-CHQ are reliable, and valid tools for the functional, physical and psychosocial assessment of children with JIA.

Adolescent↗
PubMedDate not supplied

[Familial Mediterranean fever--an important differential diagnosis in systemic juvenile chronic arthritis].

Familial Mediterranean Fever (FMF), characterized by recurring episodes of fever, serositis, arthritis, skin changes and complicated by amyloidosis in 30%-60% of cases frequently begins in childhood. Systemic juvenile rheumatoid arthritis (systemic JRA, Still's disease) is the most important differential diagnosis. In our series of 10 patients the mean age of onset was 4.9 +/- 2.2 years (range 2-9 years). The mean time period elapsed before the diagnosis was established was 4.1 +/- 2.7 years (range 1.5-10 years). Three of our 10 patients already had developed renal amyloidosis at the time of diagnosis. Essential criteria for differential diagnosis against systemic JRA were positive family history for FMF (4/10), ethnic background (9/10 of Turkish decent), typical erysipeloid skin rashes (4/10), attacks of abdominal pain accompanied by fever (10/10) and the characteristic pattern of recurrent episodes lasting only a few days each (a patient's diary monitoring the attacks may be helpful). In problematic cases the metaraminol provocative test can be helpful. If an elevated plasma dopamine beta-hydroxylase activity appears to be a specific finding in FMF patients, this may well open up new avenues in the early diagnosis of the disease. Since amyloidosis can be prevented by prophylactic long lasting treatment with colchicine, a timely diagnosis of FMF is the physician's challenge.

Adolescent↗