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K Sawazumi

Publications and source records attributed to K Sawazumi.

6 recordsLinked to original sources
PubMed1990

Massive fetomaternal hemorrhage: case report.

Massive fetomaternal hemorrhage (FMH) is rare. Early diagnosis is important because FMH has a poor prognosis in the antepartum or early postpartum period. A case of massive FMH in which 400 ml blood was lost is presented here. Fetal anemia was suspected from the sinusoidal fetal heart rate pattern. The hemorrhage in the maternal circulation was diagnosed before delivery by using the Kleihauer-Betke test. An emergency cesarean section was performed. The cord hemoglobin level was 3.7 g/dl. The baby's severe anemia was treated with a neonatal blood transfusion. In this case, the baby had a good clinical course. Early diagnosis and treatment of massive FMH are necessary for a good prognosis.

Adult↗
PubMed1988

[A study of the cardiotocograms recorded by a separated 1MHz ultrasound transducer].

Fetal heart rate records were obtained in 12 antepartum and 13 intrapartum cases, with an ultrasonic Doppler transducer with five separated crystals and a conventional transducer. The loss of the FHR record due to increased noise in 30 minutes before delivery ranged from 1.1 to 23.2% (6.4 +/- 6.5%) in the separate type transducer, and it was 0.6 to 29.9% (10.5 +/- 7.6%) in the conventional one. During the 5 minutes before delivery, it was 3.3 to 58.0% (20.2 +/- 18.5%) in the separate type, and 3.3 to 70.0% (31.6 +/- 19.5%) in the conventional one. Clearer FHR records were obtained with the use of the separate type than the conventional one (p less than 0.05). Noise was mostly recorded in the 5 minutes before delivery. In the NST, the loss of the FHR record due to maternal posture change decreased when the new transducer (p less than 0.05) was used. The loss was 0 to 56.7% (14.9 +/- 18.2%) with the new type, and 2.0 to 100% (42.9 +/- 36.4%) with the conventional one for the maternal posture which showed the worst record. By using the separate type transducer, maternal posture need not to be limited in the NST, and the somatic and mental discomfort is less than when the conventional one is used.

Female↗
PubMed1988

[Studies on the cardiotocograms recorded by a new system with 1 MHz ultrasound and autocorrelation heart rate meter].

Improved FHR records were obtained by the use of a new 1 MHz ultrasound transducer and autocorrelation heart rate meter. The results were compared with conventional 2.5 MHz continuous wave ultrasound device. The rate of the loss of FHR recording was 0 to 6.6% (2.8 +/- 2.1%) in the new device, and it was 2.1 to 23.5% (8.7 +/- 6.2%) in the old one. The loss of FHR record in the 2nd stage of labor was 3.2% when 1 MHz ultrasound and new device were used, and it was 2.0% with direct fetal ECG signal using scalp electrode and the same device. More clear record was obtained with use of ultrasound at a crowning of fetal head than that of direct fetal ECG. In the use of 1 MHz ultrasound, 51% cases in 55 patients showed undisturbed FHR record 1 minute before delivery of the fetus. Slightly noisy but analysable FHR record was obtained in 36%. Hence, the FHR records were clearly evaluated until 1 minute before delivery of the infant in 87% of the cases. Maternal heart rate signal was mixed with FHR in 2 cases in routine intrapartum ultrasonic FHR monitoring. However, the maternal signal disappeared after moving the transducer to other position where fatal heart beat was more clearly detected.

Electrocardiography↗
PubMed1982

[A study on the relation among oxytocin challenge test, maternal serum estriol level and placental change (author's transl)].

FHR oxytocin challenge test (OCT), maternal serum estriol level, neonatal birth weight and placental findings were studied in 206 cases. 1) Maternal serum estriol levels were not always related to the results of OCTs. 2) In the cases of positive and equivocal OCTs, the birth weight and the placental weight were smaller than those in negative OCT cases. 3) Positive and equivocal OCTs were frequently related with calcification and infarction of the placentae. 4) Neonatal birth weight showed close relation to the placental weight, though insignificant relation to maternal serum estriol level was observed. 5) The frequency of positive and equivocal OCTs was high in the cases of right-posterior position of placenta, and low in the cases of left-anterior.

Adult↗
PubMed1981

[A study on oxytocin challenge test of the fetus with quantitative tocodynamometry determined by contraction index (author's transl)].

External tocodynamometric transducer loaded by 800 g weight on its back was placed on the abdomen of pregnant estimated by contraction woman and uterine contraction during NST and OCT was index which was defined by 10 minutes' total of amplitude (g/cm2) multiplied by the duration (min) at the half amplitude. Observations of OCTs were similar to intrapartum ones. OCT was more useful than NST in the prediction of fetal distress during labor. The adequate contraction index for OCT was 65 to 70 min . g/cm2.

Adult↗