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Biomedical subjects

A Meberg

Publications and source records attributed to A Meberg.

At least 73 records · Page 4Linked to original sources
PubMed1979

Uromucoid (Tamm-Horsfall's mucoprotein) in amniotic fluid and in urine in children.

Uromucoid (Tamm-Horsfall's mucoprotein) was not detected in amniotic fluid from pregnancies with gestational are 12-18 weeks, but was detected in 5 of 9 samples of amniotic fluid from full-term pregnancies, and in urine from all full-term infants investigated 1st day of life. This suggests that uromucoid excretion under normal conditions established near term. Change from intrauterine to extrauterine life may rapidly induce uromucoid excretion, as this protein was found in premature infants (32-34 weeks of gestation) at the 2nd day of life. Healthy newborn infants had a lower uromucoid concentration in urine than children 7--13 years old. In newborns with uncomplicated prematurity, idiopathic respiratory distress syndrome and full-term asphyxiated newborns, the uromucoid concentration in urine during the 1st week of life was not different from healthy newborn infants. Though uromucoid is found to be the major constituent of hyaline casts, the excretion of casts did not correlate to the uromucoid concentration.

Adolescent↗
PubMed1978

Plasma concentration of diazepam and N-desmethyldiazepam in children after a single rectal or intramuscular dose of diazepam.

The absorption of diazepam and N-desmethyldiazepam after administration of diazepam solution for parenteral injection per rectum and intramuscularly was studied in 9 children (ages 3--12 years). Rectal administration of diazepam 1 mg/kg led to rapid absorption with plasma levels of 270--320 ng/ml within 5 min, and peak levels of 600--1300 ng/ml 10--60 min after administration. The absorption was comparable to that after intramuscular administration. A second peak in plasma diazepam concentration 6--12 h after dosing was observed in 6 children, which may have been due to mobilization of diazepam from the gastrointestinal mucosa produced by feeding 4 h after administration of the drug. A slowly increasing plasma level of N-desmethyldiazepam was observed during the first 24 h after administration of diazepam.

Child↗
PubMed1978

Hypoxanthine in cerebrospinal fluid in children.

In forty-five children the hypoxanthine concentration in cerebrospinal fluid (CSF) was measured (fifty-two samples). In newborn infants (nineteen patients) the hypoxanthine levels were higher in patients with clinical conditions associated with hypoxia (idiopathic respiratory distress syndrome, asphyxia, apneic attacks) than in patients without clinical hypoxia (P less than 0.01). In hypoxic patients the hypoxanthine concentration varied between 5 and 28 mu mol/l. In children outside the neonatal period the hypoxanthine concentration in CSF varied considerably in different diseases. High levels were registered in meningitis prior to treatment, febrile convulsions and in lymphoblastic leukaemia, probably reflecting tissue hypoxia and an increased tissue catabolism.

Child↗
PubMed1978

Plasma concentrations of diazepam and N-desmethyldiazepam in newborn infants after intravenous, intramuscular, rectal and oral administration.

Five newborn infants (birth weight 2900--3600 g) were given diazepam (Valium, LaRoche) for convulsive disorders in 4 equal doses intravenously, intramuscularly, rectally and orally with at least 24 hours intervals. Three infants were given doses of 1 mg diazepam/kg body weight, and 2 0.5 mg/kg. The parenteral solution of the drug was given intravenously, intramuscularly and rectally. Powder of tablets was given orally. After intravenous administration very high peak values of plasma-diazepam concentration were obtained (5775--10800 ng/ml after 1 mg/kg, 2750 and 6450 ng/ml after 0.5 mg/kg). Next to intravenous administration rectal administration caused the most rapid increase in plasma-diazepam concentration. Presumed anticonsulsive concentrations (150--300 ng/ml) were obtained within 5 min with 1 mg/kg as well as 0.5 mg/kg rectally. Rectal administration therefore could be a suitable treatment for seizures in the newborn infant. Accumulation of the main depressive metabolite N-desmethyldiazepam occurred in all infants. This phenomenon must be taken into account when repeated doses of diazepam are administered.

Administration, Oral↗
PubMed1978

Uromucoid in normal urine.

Uromucoid was determined in urine from persons or various ages with normal kidney function by a radial immunodiffusion technique. Uromucoid concentration was inversely correlated to diuresis. Excretion rates showed a weak correlation to body surface area in young adults of both sexes. Children had a greater excretion of uromucoid per m2 than young adults, and even newborn had a considerable excretion. Elderly subjects had similar excretion rates to young adults. Excretion rates were uninfluenced by sex, salt load or diuresis, and no difference between day and night excretion rates was observed. Intraindividual fluctuations were small, and determination of uromucoid in one single night's urine therefore gives an adequate expression of the uromucoid excretion rate.

Adolescent↗
PubMed1977

Ampicillin and pivampicillin in the treatment of urinary tract infection in children.

16 children, aged 1-10 years, suffering from urinary tract infection were randomly divided into two groups. Ten children were treated with ampicillin pediatric suspension in a dose of 100 mg ampicillin/kg/24 hours divided in 4 doses, and 6 children with pivampicillin base pediatric suspension in a dose of 64.8 mg/kg/24 hours divided in 4 doses (approximately 50 mg ampicillin/kg). The treatment period was 14 days with all infections being cured. Despite the fact that pivampicillin was administered in half of the dosage of ampicillin the resulting peak serum concentration was 65% higher and was achieved more rapidly. The bioavailability and urine concentration were also greater. A marked change in the rectal aerobic bacterial flora occurred during both treatment regimens. In 13 children (81%) a shift took place from ampicillin-sensitive E. coli to ampicillin-resistant Klebsiella strains as the predominating microbe, equally often in both groups of treatment. Ampicillin-resistant E. coli appeared in one child in each group.

Ampicillin↗