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PubMed1990

The obstetric forceps--are we using the appropriate tools?

A total of 166 pairs of obstetric forceps of three different types in regular use in two major obstetric units was measured and compared with manufacturers' master instruments and drawings. As well as linear measurements of blade, shank and handle the distances between the tips and maximum distance between the blades, and the mean radius of the cephalic curve were determined. The purpose of the study was to assess the suitability of instruments in common use for present day practice. It was found that the measurements differed significantly from the original descriptions and there were wide variations between instruments of the same type, even when supplied by the same manufacturer. In some cases the blades had not been packed in matching pairs in the Central Sterile Supplies Department. It is suggested that critical reappraisal of the forceps in current use in many obstetric units is overdue. As well as a need for reconsidering the type of forceps used the dimensions of individual pairs should be checked.

Equipment Design↗
PubMed1985

Obstetric forceps pad designed to reduce infant trauma.

The use of the standard obstetric forceps has been associated with varying degrees of maternal and fetal trauma. To reduce the degree of skin markings, a pliable polyurethane pad with selfadherent backing has been designed, which can be applied to each blade of the forceps. One hundred five neonates who required forceps-assisted deliveries were observed for evidence of skin trauma immediately after delivery and again at 24 hours. Padded forceps significantly reduced craniofacial visible skin markings when compared with the skin markings produced by the unpadded forceps. The addition of the pad to the forceps blade had no adverse effect on the mother, and obstetricians encountered no problems in the application and use of the pads.

Adolescent↗
PubMed2005

[Enigmas surrounding an obstetric forceps belonging to Albertus Titsingh (1714-1790)].

In the collections of the Society of the Dutch Journal of Medicine there is a small box containing a small obstetric forceps modelled on that of the British physician Smellie and some documents with information about its origin. The instrument belonged to the Amsterdam surgeon-obstetrician Albertus Titsingh and is claimed in the documentation to have been used during the birth of the later King William I (1772-1843) in 1772. However, historical research indicates that this is very unlikely: it is an established fact that the birth of William I was rapid and successful, while Albertus Titsingh was an authoritative obstetrician in an 'obstetric climate' of biding one's time and taking no action until the natural powers have failed.

Female↗
PubMed2002

A randomised prospective trial of the obstetric forceps versus vacuum extraction using defined criteria.

The objective of this study was to determine the safety of obstetrics forceps when used under strictly defined criteria compared to vacuum extraction for delivery in the second stage of labour. A randomised prospective trial was performed on 442 women undergoing instrumental delivery in the second stage. Two hundred and four women were in the forceps group and 238 in the vacuum group. When using forceps traction efforts to deliver the baby were kept to less than three and the head was always delivered in the occipito-anterior position. In the two groups there were no significant difference in the incidence of third-degree perineal tears, post-partum haemorrhage or ruptured uterus. Cervical tears were slightly higher in the forceps group. Babies delivered by vacuum extraction showed a higher incidence of cephalhaematomas. There was no significant difference in babies needing resuscitation at birth, admission to neonatal intensive care unit, stillbirth or neonatal death rates. The failure rate was significantly higher in the vacuum group. The time taken to complete the procedure was significantly less in the forceps group. Forceps deliveries when performed under defined criteria are as safe as vacuum deliveries to the mother with a lesser failure rate and a lower incidence of cephalhaematomas in the neonate compared with vacuum deliveries.

Adult↗
PubMed1977

[Mechanical action of obstetrical forceps on the fetal skull].

By means of schematic illustrations we demonstrate the working point of the power of labour, obstetrical forceps and vacuum extractor, The bones of the fetal skull are by sutures movable fastened together. Every extraction so will rise the intracranial pressure of the fetus, because the resistance of the birth canal tissues must be overcome. This for the extraction needed power and rising of the intracranial pressure is independent from the instrument with which the extraction is carried out. It is impossible to make a "cage" around the fetal head with the Shute forceps during extraction, to protect the fetal head from the extraction power. Another question is, that some instruments (included vacuum extractor) can limit the used power. By using forcipes with crossed lock without fixation the forces for extraction are not limited and there is a need of better operative technic. By the comparison of the forcipes from Shute, Naegele and Zweifel we can summarize, that for success is decided the indication and good operative technic and not the instrument. Every instrument for vaginal extraction has advantages and disadvantages in different obstetrical situations.

Biomechanical Phenomena↗
PubMedDate not supplied

[Obstetric forceps].

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Obstetrical Forceps↗