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Biomedical subjects

D Lewin

Publications and source records attributed to D Lewin.

At least 55 records · Page 3Linked to original sources
PubMed1981

[Induction of labour using interrupted transfusions of posterior pituitary hormone. A study in uterine contractility (author's transl)].

We have tried to induce labour using interrupted infusions of oxytocin in order to try to mimic the physiological spurts that occur in the secretion of circulating oxytocin. Uterine contractions are quite different from those found in the usual form of induction of labour. Induction in this way resulted in dilatation of the cervix and vaginal delivery in the 100 cases we have studied. It seemed to us that with the absence of an intra-uterine catheter induction could be successful without rupturing the membranes.

Anesthesia, Epidural↗
PubMed1980

[The diagnostic value of petrous bones in the fetal scalp (author's transl)].

We studied the orientation of the petrous bones in the fetal scalp in 200 X-ray pelvimetries. It is easy to measure the petrous bones' orientation when the fetal scalp is studied with Thoms view. It is possible to measure the height of the head in the pelvis in the lateral view. We have been able to measure asynclitism in flexion using a calculating machine. It seems to us that these findings are useful for the practical conduct of labour and can be of helpful prognostic value.

Female↗
PubMed1978

[Echotomographic aspects of cervical incompetence during pregnancy].

During pregnancy, the opening of the cervix can be measured by perineal echotomography. Among 200 per-gravidic clinical echotomographies, 23 cervical incompetences were recognized. A "funnel-shaped" cervix is a cervix with an internal os larger than the external os; thus no clinical sign may be apparent and only a supra-vaginal Shirodkar's operation should be done.

Adult↗
PubMed1978

Simultaneous measurements of intrauterine pressure, including the head-to-cervix pressure, by an open-end catheter and a strain gauge.

An open-end catheter and a small strain gauge were tied and introduced into the uterine fundus during the labor of 8 parturients. As the tied probes were progressively withdrawn, the pressures given by each were simultaneously recorded. Normally the measurements are identical, but when the free ends of the probes are located between the head and the cervix, striking differences appear, the strain gauge giving much higher figures. Conversely, two intrauterine open-end catheters give the same results even if one is located in the fundus and the other is between the head and the cervix. It is suggested that the strain gauge measures a pressure which is not reliable enough because the area of application of the stress cannot be known accurately.

Catheterization↗
PubMed1978

[The concentration of fetal cells in maternal haematopoietic organs during pregnancy. An experimental study in mice (author's transl)].

We have been able to show that fetal cells are able to survive and multiply in the haematopoietic organs of the pregnant mouse. We have been able to label fetal cells with a chromosome marker (T6) which is clearly visible in the metaphase of mitosis. It is not only that there is a considerable concentration of fetal cells in the maternal spleen (3 to 6 per cent) but there are several factors that suggest that these fetal cells can multiply there. These are, the presence of mitoses, long survival, and a rise in numbers in the case of a new pregnancy. Thus pregnancy seems to bring about a physiological "microchimerism".

Animals↗
PubMed1977

Measuring the height of a cephalic presentation: an objective assessment of station.

The authors have previously described a method of objectively assessing the height of the presentation, an ultrasonic echograph measuring the distance from the head to the sacral tip. They have now obtained 453 measurements made before and during labor; norms are given according to the clinical evaluation of the station. The usefulness of the method is discussed. It may make the Bishop's score more precise, permit a more accurate check of trial of labor and help to recognize a low station correctly before an application of forceps.

Body Height↗
PubMed1977

[A model of automatic regulation of uterine contractions].

The uterus can contract without innervation and without nodal tissue. On the model proposed, purely myogenic regulation results from certain properties of the elementary contractile units of the uterus. Using a fragment of a tracing of the intrauterine pressure curve, the theoretical continuation of such a tracing can be calculated.

Female↗
PubMed1976

[Uncommon form of vesico-uterine fistula].

A vesico-uterine fistula has been seen after a caesarean section. Unusually, the discharge ran from the bladder to the uterus. The problems of the aetiology, the diagnosis and the treatment are discussed.

Adult↗