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Biomedical subjects

M Camus

Publications and source records attributed to M Camus.

At least 181 records · Page 10Linked to original sources
PubMed1986

[Facial paralysis of obstetrical origin. Etiology, evolution].

In the case of 17 obstetrical facial paralyses occurring in a total of 20,409 births, the authors have studied the circumstances of their appearance and the prognosis for this lesion. It is a rare lesion favoured by asymmetric purchase when using articulated forceps. The authors insist that use of Thierry's forceps do not harm the facial nerve. They emphasise the possibility that progression may not always be favourable.

Birth Injuries↗
PubMed1985

Growth rate of follicular estrogen secretion in relation to the outcome of in vitro fertilization and embryo replacement.

Estradiol growth rate (EGR) during active follicular development was calculated for 89 stimulated in vitro fertilization cycles by exponential curve fit (r = 0.83). Cycles could be divided into four groups with very low, low, moderate, and high EGR values. Cases without oocyte fertilization and/or embryo replacement did not occur in the moderate EGR range, which also corresponded to a significantly better ratio of replaceable embryos versus oocytes recovered. This group was also endowed with a pregnancy rate amounting to 28.5% per laparoscopy and per replacement, i.e., about three times higher than in the three other groups. Very low or high EGR entailed significantly higher percentages of missed oocyte recovery and/or fertilization failure. The frequency of occurrence of a spontaneous luteinizing hormone peak was negatively correlated with EGR. The data indicate that a better outcome of in vitro fertilization may be expected when the estrogen rise starts early in the cycle and adopts a moderate growth rate (0.3 to 0.4).

Embryo Transfer↗
PubMed1985

[Obstetrical injuries of the newborn infant. Retrospective study apropos of 20,409 births].

We have been able to find 291 cases of obstetric trauma when we analysed the 20,409 deliveries which took place in the Pitié maternity between 1971 and 1980. It has been shown that bony lesions did well in the long and short term but nerve lesions had a far less good prognosis. This pathology should become far less when it is possible to recognize better when the fetus is large and when such traumatising manoeuvres as high forceps and assisted deliveries of large breech babies are stopped.

Birth Injuries↗
PubMed1984

Effects of in-vitro fertilization, culture, freezing and transfer on the ability of mouse embryos to implant and survive.

The survival after transfer of frozen-thawed mouse blastocysts obtained from culture of in-vitro fertilized oocytes or 1- and 2-cell ova was compared. About 10% of transferred embryos developed to term in each group and there was no difference between embryos fertilized in vitro or in vivo. In addition to embryonic loss due to transfer, in-vitro cultivation and freezing reduced the proportion of fetuses considered viable at Day 15 of pregnancy (29.8 versus 50.7% and 26.3 versus 50.7% respectively). When used together these procedures had an additive effect on fetal wastage (18.4 versus 50.7%). In-vitro culture also entailed a significant increase of resorbing implantation sites (10.2 versus 4.3%). The re-expansion rate after freezing and thawing of blastocysts grown in vitro was paradoxically greater than that of blastocysts grown in vivo (85.8 versus 54.6%).

Animals↗
PubMed1982

Induction of implantation in the rat by intraparametrial injection of uterine RNA from oestrogen-treated animals.

Crude RNA preparations from uteri of oestradiol-treated rats induced the implantation of delayed blastocysts when injected into the parametrium of ovariectomized pregnant rats. Treatment of donor animals with labelled oestradiol showed that this effect could not be due to contamination of the RNA extracts by oestradiol. RNase digestion of these extracts suppressed their capacity to induce implantation. Purified poly (A)-rich RNA from oestrogen-treated uteri failed to elicit implantation although it was capable of increasing epithelial height when repeatedly injected into uterine horns of ovariectomized rats. These results suggest that uterine RNA synthesis might somehow mediate the effects of oestrogen in causing implantation and that RNAs other than messenger RNA might be involved.

Animals↗
PubMed1978

Increased serum thyroglobulin levels in patients with nontoxic goiter.

Thyroglobulin (Tg) levels were found to be elevated in 30 to 35 patients with euthyroid sporadic goiter and in 15 of 37 patients with euthyroid endemic goiter. The elevated Tg levels in the goitrous patients did not correlate with either goiter size, TSH levels, or urinary iodine excretion, but did correlate with the triiodothyronine to thyroxine ratio. It was concluded, therefore, that in both sporadic and endemic euthyroid goiters, factors other than goiter size and TSH, such as hypoiodination of Tg may be responsible for the elevated Tg secretion.

Adult↗
PubMed1978

[Adverse effect of amniofetography on fetal thyroid function (author's transl)].

Amniofetography is a valuable tool for the diagnosis of fetal malformations. We have studied the effect of radiopaques dyes, containing large amounts of iodide, on fetal thyroid function. We have performed serial determinations of serum thyrotropin and thyroxine in seven newborn infants submitted to amniofetography. This work demonstrates that amniofetography induces a transient impairment of fetal thyroid function.

Contrast Media↗
PubMed1977

Serum thyrotrophin determination on day 5 of life as screening procedure for congenital hypothyroidism.

In 327 newborns cord blood thyroxine (T4) was 11.8 +/- 0.4 mug/100 ml (SEM) (151.9 +/- 5.1 nmol/l), and serum thyrotrophin (TSH) 6.7+/-1.0 muU/ml. Variability was marked for both T4 and TSH. Remeasured in the same patients on the fifth day of life, the TSH level was 3.7 +/- 1.0 muU/ml, lower than at birth (P less than 0.001), while scattering of TSH values was much smaller, with 99.4 % of values less than 12 muU/ml...

Congenital Hypothyroidism↗