Blood contamination of amniotic fluid after amniocentesis in relation to placental location.

The aim of the present study was to evaluate blood contamination of the amniotic fluid collected in 20 patients undergoing a second amniocentesis performed 2 weeks after a first procedure that had failed due to Pseudomonas aeruginosa contamination of the cell cultures. Red blood cell and haemoglobin concentrations in the amniotic fluid were significantly higher in patients who had undergone a transplacental procedure compared with patients in whom the placenta was not traversed with the needle. For both groups, blood contamination of the amniotic fluid was significantly higher compared with a control group of 20 patients undergoing amniocentesis for the first time.

Cellular effects of image diagnostic ultrasound on murine spermatogenesis monitored by flow cytometry.

A study has been carried out to evaluate the possible cellular effects induced by image diagnostic ultrasound on murine spermatogenetic cells. Exposure to ultrasound was carried out using a commercial diagnostic instrument that operates in B-mode. Male hybrid F1 mice, aged 8-10 weeks, were exposed to ultrasound for 30 min and observed from 7 to 35 days after treatment.

Transplacental amniocentesis: is it really a higher-risk procedure?

The aim of this study was to compare transplacental with non-transplacental amniocentesis in terms of related complications. Between January 1991 and December 1992, 4564 genetic amniocenteses were performed in 4527 patients (4491 singleton, 35 twin, and one triplet pregnancy) at 15-16 weeks of gestation. All the procedures were ultrasound-guided and performed by the same operator.

Ultrasound-guided aspiration of ovarian endometriotic cysts.

Objective: To evaluate the outcome of ultrasound-guided aspiration of ovarian endometriotic cysts.

Method: Thirty-four patients with ovarian endometriomas were submitted to transvaginal (28 patients) or transabdominal (6 patients) ultrasound-guided aspiration of the cyst content, and then followed with serial ultrasonograms for a mean period of 12 months (range 6-20 months).

Result: The procedure was successful in all cases, and no early complications occurred.

Flow cytometric and cytogenetic analyses in human spontaneous abortions.

Cytogenetic and flow cytometric analyses were performed on 38 human spontaneous abortions in an attempt to obtain information on karyotype abnormalities and to compare the two approaches of analysis. In 19 cases, it was not possible to perform cytogenetic analysis because too long a time had passed between surgical sampling and cell culture, and in vitro culture failed. Of the 19 cases analyzed, 10/19 showed a normal karyotype and 5/19 showed a single trisomy (2/5 trisomies involved chromosome 16, 1/5 trisomy involved chromosome 18, 1/5 trisomy involved chromosome 20, and 1/5 was Klinefelter syndrome).