PubMed Health⌕ Search

Biomedical subjects

J J Oats

Publications and source records attributed to J J Oats.

12 recordsLinked to original sources
PubMed2001

Sonographic estimation of fetal weight in macrosomic fetuses: diabetic versus non-diabetic pregnancies.

The objective of this study is to compare the accuracy of sonographic estimation of fetal weight of macrosomic babies in diabetic vs non-diabetic pregnancies. All babies weighing 4,000 g or more at birth, and who had ultrasound scans performed within one week of delivery were included in this retrospective study Pregnancies with diabetes mellitus were compared to those without diabetes mellitus. The mean simple error (actual birthweight--estimated fetal weight); mean standardised absolute error (absolute value of simple error (g)/actual birthweight (kg)); and the percentage of estimated birthweight falling within 15% of the actual birthweight between the two groups were compared. There were 9,516 deliveries during the study period. Of this total 1,211 (12.7%) babies weighed 4,000 g or more. A total of 56 non-diabetic pregnancies and 19 diabetic pregnancies were compared. The average sonographic estimation of fetal weight in diabetic pregnancies was 8% less than the actual birthweight, compared to 0.2% in the non-diabetic group (p < 0.01). The estimated fetal weight was within 15% of the birthweight in 74% of the diabetic pregnancies, compared to 93% of the non-diabetic pregnancies (p < 0.05). In the diabetic group, 26.3 % of the birthweights were underestimated by more than 15 %, compared to 5.4% in the non-diabetic group (p < 0.05). In conclusion, the prediction accuracy of fetal weight estimation using standard formulae in macrosomic fetuses is significantly worse in diabetic pregnancies compared to non-diabetic pregnancies. When sonographic fetal weight estimation is used to influence the mode of delivery for diabetic women, a more conservative cut-off needs to be considered.

Abdomen↗
PubMed1979

The recurrence rate and significance of low oestriol excretion in successive pregnancies.

A total of 440 women who had low oestriol excretion in a previous pregnancy was investigated by urinary oestriol assays in one or more subsequent pregnancies. The incidence of low oestriol excretion in the subsequent pregnancy was 29.1 per cent, or more than double that in the total obstetric population (13.4 per cent; p less than 0.001). Patients with persistently low oestriol excretion had a 40.8 per cent recurrence rate in subsequent pregnancies. When oestriol excretion was low in successive pregnancies it retained a significant association with increased incidences of stillbirths, neonatal deaths and fetal growth retardation. It was concluded that low oestriol excretion in a previous pregnancy is a definite indication to test fetoplacental function in subsequent pregnancies even when the clinical findings are normal.

Estriol↗
PubMed1979

Sequential changes in the human renin-angiotensin system following therapeutic termination of pregnancy.

Plasma renin and angiotensin II levels were measured in nine patients immediately before and at half-hourly intervals in the four hours following therapeutic termination of pregnancy. There was a small fall in renin and angiotensin II levels over the first 1 to 2 hours, followed by a slight increase. The magnitude of these effects was much smaller than those previously seen following normal delivery. It is concluded that in early pregnancy maternal, rather than feto-placental, factors are controlling the renin-angiotensin system.

Abortion, Therapeutic↗
PubMed1978

Sequential changes in the human renin-angiotensin system following delivery.

Plasma renin activity and concentration and angiotensin II concentration have been measured serially in six normotensive primigravidae and in four mildly hypertensive patients in the four immediately following normal delivery. In normotensive patients, both renin and angiotensin II levels fell sharply over the first two hours to levels within the non-pregnant range, with a subsequent rise to levels, similar to those found in late pregnancy. Changes in the mildly hypertensive patients were smaller, and somewhat slower. It is suggested that the initial fall represents clearance of a renin of fetoplacental origin and that the subsequent rise may be a release from feedback suppression of renal renin synthesis.

Angiotensin II↗
PubMed1977

Evacuation of retained products of conception in a treatment room and without general anaesthesia.

One hundred patients with an incomplete aboriton, 14 patients with retained products of conception after a second trimester termination, 5 patients with missed abortion and 2 patients with secondary postpartum haemorrhages (making a total of 121 patients) had a uterine evacuation in a treatment room using the portable Karman curette equipment. No general anaesthesia was used but patients were given intravenous pethidine or papavaretum (Omnopon) and diazepam. Four patients found the procedure painful but only two of them would have preferred general anaesthesia. There were no immediate complications but three patients required re-evacuation of the uterus.

Abortion, Incomplete↗
PubMed1976

Carcinoma of the cervical stump.

A study was made of 56 patients with carcinoma of thecervical stump after subtotal hysterectomy who were seen between 1946 and 1972 at the National Women's Hospital, Auckland, New Zealand. The duration of symptoms before diagnosis, stage distribution and five-year survival rates were examined and compared with those in 1459 patients with carcinoma of the cervix, and no previous subtotal hysterectomy, who presented over the same period.

Adenocarcinoma↗