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PubMed1986

Retinal hemorrhage and vacuum extraction delivery.

The purpose of this prospective study was to investigate whether there is an increased risk of retinal hemorrhage in those infants delivered with the assistance of the silastic vacuum extractor from mothers who were low-risk and who had normal labors. Ocular fundi of 38 term newborns (19 vacuum assisted deliveries, 19 spontaneous deliveries) were examined for retinal hemorrhage within 72 hours after delivery. The overall frequency of retinal hemorrhage was 21.1%, 31.6% with the vacuum extractor and 10.5% with a spontaneous delivery. The mode of delivery did influence the number of infants with hemorrhages in each category, however this was only statistically significant in primiparous patients. The prognostic significance of the degree of retinal hemorrhage was not assessed.

Extraction, Obstetrical↗
PubMed1985

[Significance of trial vacuum extraction in the framework of obstetric surgery in vertex presentation].

On the basis of a clinical study of 76 infants born by trial vacuum extraction from the pelvic inlet, 57 infants were examined retrospectively with regard to early and late morbidity after "successful" trial vacuum extraction. In 34 cases surgery was indicated because of fetal distress; in 23 children the operation was performed because of a standstill at the pelvic inlet. The results were compared with a group of infants delivered by vacuum and forceps extraction from the centre of the pelvis (or the pelvic floor) or cesarean section in consequence of fetal distress. The results indicate the high risk for children born by trial vacuum extraction, especially in cases of fetal distress. In addition to statistically significant lower Apgar scores and a statistically significant higher acidosis morbidity (p less than 0.05) as compared to other obstetric operations, there is also a statistically significant greater number of "striking" and "injured" children as opposed to those delivered by vacuum or forceps extraction from the centre of the pelvis (or the pelvic floor) or by cesarean section in consequence of fetal distress. These neurological deviations represent primarily the static-motoric and speech development, and are analogous to late morbidity after births from breech presentation. The findings confirm the clinical impression that trial vacuum extraction-especially in cases of fetal distress at the pelvic inlet-represent an additional risk to the child. In such cases cesarean section is the only alternative method of delivery.

Apgar Score↗
PubMed1988

Retinal hemorrhages and traction forces in vacuum extraction.

The relationship between the traction forces used in 53 clinically indicated vacuum extractions and the incidence and degree of retinal hemorrhages observed in the neonates within 24 hours after birth was examined. A Vacuum Extractor Recorder (Type SF 30, Knick), was used to measure the traction force necessary for delivery of the fetal head. No relationship could be demonstrated between the force time integral and the appearance and grading of retinal bleedings.

Adult↗
PubMed1986

Comparison between the conventional Malmström extractor and a new extractor with Silastic cup.

One hundred women for whom instrumental delivery had to be performed due to fetal asphyxia or uterine inertia were randomized to a vacuum extraction with the conventional Malmström instrument or the Silastic cup of Kobayashi. With the Silastic cup, extraction time was shorter and injuries to the scalp were less common. On the other hand, extraction with the Silastic cup failed more often, especially in occiput posterior position. There were no differences in Apgar scores between the two groups.

Clinical Trials as Topic↗