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Biomedical subjects

H Grandjean

Publications and source records attributed to H Grandjean.

At least 91 records · Page 5Linked to original sources
PubMed1987

Effects of artificial cryptorchidism on sperm morphology.

In a diurnal artificial cryptorchidism (AC) experiment intended to provide a male contraceptive method, oligoasthenozoospermia was found as early as the fourth month, accompanied by an increase in the mean percentage of abnormally shaped spermatozoa. A detailed morphologic study concerning 19 volunteers exposed for 6 to 24 months demonstrated that the overall increase of the mean percentage of abnormally shaped spermatozoa resulted from the percentage increase of elongated, thin, and irregular heads and of bent tails. This increase is probably caused by the rise in environmental testicular temperature induced by AC. A return to baseline values was observed within 12 months after the end of the experiment.

Adult↗
PubMed1985

IgG subclasses and Gm allotypes of anti-D antibodies during pregnancy: correlation with the gravity of the fetal disease.

The IgG subclasses and the Gm allotypes of anti-D antibodies were studied in 103 isoimmunized pregnancies with Rh-positive infants. No allelic exclusion phenomena were observed in patients heterozygous for the studied genes. An analysis of the correlation between the severity of fetal disease and the type of anti-D antibodies shows a greater hemolytic action of the IgG1 subclass and, within this group, those marked by the Gm(4) allotype. These results suggest that the prognostic value of anti-D antibody titers during pregnancy could be modulated by a study of the IgG subclasses and their allotypes.

Bilirubin↗
PubMed1985

Inhibiting effect of artificial cryptorchidism on spermatogenesis.

In order to provide a contraceptive method in man, an attempt at inhibition of spermatogenesis was made by means of thermogenesis induced by artificial cryptorchidism. This experimental protocol consists of pushing up the testicles into the inguinal canal and keeping them there, each day during waking hours, by means of an adapted athletic supporter. Fourteen men volunteered for this protocol during a 6- to 12-month period. They all had a normal semen analysis before starting the experiment. The total sperm count, the sperm count per milliliter, the motility, the motile sperm count per milliliter, and the total motile sperm count dropped significantly after the first or second month; they reached their lowest values after the sixth month and remained stable during the next 6 months. At that time the average values reached were a total sperm count of 12 to 34 X 10(6)/ejaculate, a sperm count of 3 to 10 X 10(6)/ml, a motility of 21% to 34%, a motile sperm count of 1 to 3 X 10(6)/ml, and a total motile sperm count of 4 to 12 X 10(6)/ejaculate.

Adult↗
PubMed1984

A fluorimetric enzyme-linked immunoassay (FEIA) for measurement of anti-D antibodies.

A new enzyme-linked immunoassay for the determination of anti-erythrocyte antibodies is described. A fluorogenic substrate of alkaline phosphatase, the 4-MUP, was used to reveal the antigen-antibody reaction. This substrate was chosen in order to avoid interferences with haemoglobin, since it emits a light with a wavelength outside the absorption spectrum of haemoglobin. This method reaches a sensitivity in the order of 1 ng/ml. Sera from 66 Rh-immunized pregnant women and 20 control subjects have been studied. The specificity and reproducibility of the results and their good correlation with the biological and clinical parameters of the hemolytic disease of the newborn confirm the validity of the method, encouraging its routine use.

Alkaline Phosphatase↗
PubMed1983

Assessment of the predictive value of X-ray pelvimetry and biparietal diameter in cephalopelvic disproportion.

The value of X-ray pelvimetry and ultrasonic measurement of the biparietal diameter for trial of labor prognosis was assessed in 172 healthy primiparas with suspected cephalopelvic disproportion. A decision diagram which is able to correctly predict 50% of the cesarean sections without increasing the number of unnecessary cesarean sections is proposed. In addition, the study confirms the superfluity of X-ray pelvimetry in cases of high station of the fetal head at the end of pregnancy.

Apgar Score↗
PubMed1983

[Peridural analgesia during labor: comparative study of a fentanyl-marcaine combination and marcaine alone].

A randomised trial was carried out to evaluate the use of a mixture of fentanyl with marcaine in epidural analgesia. Two series of 30 patients each were studied: in the first only marcaine was given for the epidural and in the second marcaine and fentanyl mixed. Stronger and longer analgesia was obtained in the series where fentanyl was added showing that local anaesthetics can be potentiated by opiates. There was no significant difference in the two series as far as the cardiovascular, respiratory and blood gas measurements were concerned, either in the mother or in the fetus.

Anesthesia, Epidural↗
PubMed1983

[Initial trials in the treatment of feto-maternal alloimmunization in the Rhesus system with oral administration of erythrocyte antigens].

A group of 14 pregnant women with severe Rh-iso-immunization were treated by the administration of oral antigens (stromas). The aim of the treatment was to try to induce a modification of the immune response of these patients in order to minimize the fetal or neonatal consequences of their Rh-iso-immunization. The progress and outcome of the treated pregnancies are compared with those of a group of women presenting an Rh-iso-immunization of comparable severity treated according to standard methods. Stroma therapy is found to be without any danger for the mother or fetus. Even though there are 9 surviving infants in the treatment group and only 5 in the control group, the analysis of the results does not show any statistically significant difference in the two series. The results of this preliminary study would seem to justify the creation of a therapeutic trial.

Administration, Oral↗
PubMed1982

Cytochemical profile of peripheric blood lymphocytes in 7 to 27 weeks' pregnancy.

A comparative study of alpha-naphthyl (nonspecific) esterase (ANAE), acid phosphatase (AcP), and beta-glucuronidase (beta-GLUS) in the blood lymphocytes was carried out on 26 healthy pregnant women (7 to 27 weeks' amenorrhea) and on 32 normal nonpregnant women, all 58 of whom were 19 to 34 years old. In pregnant women, we found a significantly lower percentage of ANAE-positive lymphocytes (after 11 weeks' amenorrhea), a strong reduction in AcP, and a slight decrease in beta-GLUS. The modified enzyme levels of circulating lymphocytes in the early stages of pregnancy seem to be related to the depressed cell-mediated immunity.

Acid Phosphatase↗
PubMed1982

[A review of six years use of a computerised case history in obstetrics (author's transl)].

The University Centre for Gynaecology and Obstetrics in Toulouse have been using a computerised record system for obstetrics since 1974. This makes it possible for a review for a review to be undertaken each year of the work carried out in the Service and has made it possible to study over six years the evolution of the characteristics of the population who have been followed, as well as the changes in attitudes and techniques adopted during pregnancy and labour. A study has been carried out on the factors associated with perinatal mortality and prematurity. Computerisation of 13,500 records has made it possible to draw curves of birth weights, according to the duration of the pregnancy, and characterising the service given. Finally the adoption of a prospective record system used in common by several teams and checked by people specialised in this work has improved the quality and quantity of retrieval and has made it possible to foresee cooperative studies between different departments.

Birth Weight↗
PubMed1981

[Antenatal screening for neural tube defect by measuring alphafetoprotein in dried blood eluates (author's transl)].

Alphafetoprotein (AFP) was measured during pregnancy in dried blood eluates. Normal values (50th percentile) were established from 5,000 women throughout their pregnancies. AFP levels progressively increase from the 6th week (3.0 ng/ml whole blood) to the 32 week (124.0), then decrease slowly (70.1). Correlations between serum AFP and AFP from eluates is highly significant (p less than 0.001). Preservation of blood samples on blotting paper is good. An experimental screening of more than 1,500 pregnant women detected one case of anencephaly.

Female↗
PubMed1980

Detection of gestational diabetes by means of ultrasonic diagnosis of excessive fetal growth.

Excessive abdominal transverse fetal diameter is demonstrated to be a sensitive screening factor in the selection of gestational diabetic patients. An oral glucose tolerance test was performed in 92 pregnant women with potential gestational diabetes criteria and in 21 women without potential diabetic characteristics but with an abdominal transverse fetal diameter above the ninety-fifth percentile. Thirty-eight percent of the women in the latter group had an abnormal oral glucose tolerance test. Moreover, most infants born to gestational diabetic women had an excessive abdominal transverse diameter although the biparietal diameter and birth weight remained fairly normal.

Abdomen↗
PubMed1980

Platelet production time, uricemia, and some hemostasis tests in pre-eclampsia.

In order to choose the best adapted test for pre-eclampsia monitoring, platelet production time (PPT) was measured simultaneously with uricemia, factor VIII complex, beta-thrombogobulin, and other tests of platelet activation including platelet volume, density and platelet very dense body content. In the pre-eclamptic group (11 patients). In the PPT was significantly reduced in comparison with normal pregnancies (6 patients). In the pre-eclamptic group, there was good and significant correlation between PPT and the VIIIrAg/VIIIc ration (r = 0.87) and between PPT and uricemia (r = 0.79). The correlations between PPT and the other tests are poor and non-significant. Thus, for clinical purposes, the VIIIrAg/VIIIc ratio and uricemia are convenient parameters, and give very reliable information on the severity of the consumption coagulopathy which characterizes pre-eclamptic pregnancies.

Adult↗
PubMed1980

[Antenatal assessment of gestational age (author's transl)].

Antenatal assessment of fetal gestational age has been performed by amniotic fluid analyses and ultrasonography. Average estimation of amniotic fluid creatinine and glucose, Clements' test and biparietal diameter measurements produce an accurate assessment of gestational age in 80 % of normal or pathological cases. When amniocentesis is performed to estimate fetal lung maturity, this assessment of gestational age can improve obstetrical care.

Amniocentesis↗
PubMed1978

[The value of measuring blood pH in fetal monitoring during labour (author's transl)].

The authors present a series of methodological studies carried out to assess the value of the place of measuring fetal blood pH in monitoring in labour. Comparisons of the measures of pH, pCO2, pO2 and lowering of the base were carried out on the scalp in the 3 minutes which preceded the birth and in the umbilical vessels at birth. Comparing the three modes of taking blood in the mother, intra-arterially and from the capillaries with and without local vasodilatation was carried out. The limits of the values were defined both for the fetus and the mother of the parameters of pH, pCO2, pO2 and base deficit in 100 normal deliveries. A study was carried out of their correlations with the Apgar score at 1 minute and with the arterial pH. A comparison of the two series of measurements was carried out on the vessels of the cord--arterial and venous. The results confirm the value of measuring pH for diagnosing the state of the infant during labour.

Acid-Base Equilibrium↗