To save content items to your account,
please confirm that you agree to abide by our usage policies.
If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account.
Find out more about saving content to .
To save content items to your Kindle, first ensure no-reply@cambridge.org
is added to your Approved Personal Document E-mail List under your Personal Document Settings
on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part
of your Kindle email address below.
Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations.
‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi.
‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Hypoxic-ischemic injury during labour is a leading cause of perinatal mortality, severe neonatal and longer-term morbidity globally. It leads to brain damage, cerebral palsy and premature death in adult survivors. Hypoxia during labour causes fetal distress which often occurs in women without obvious risk factors. When it happens, emergency operative birth (caesarean section or instrumental vaginal birth) is frequently required. Identification of infants at risk of fetal distress or other adverse outcomes is difficult – the current approach using maternal risk factors and/or clinical assessment of fetal size is poor at detecting small or vulnerable infants. Furthermore, although the association between some risk factors and adverse outcomes is known, the actual predictive utility for a specific risk factor is often relatively poor and more accurate tests are urgently required. There is currently no treatment to prevent fetal hypoxia in labour and we have limited ability to identify vulnerable fetuses before labour commences. Timely, accurate identification of this at-risk cohort with effective intervention represents one of the great challenges in perinatal medicine.
Globally the rates of induction of labour (IOL) are on the rise. The availability of prostaglandins, which act as both cervical ripening as well as inducing agent, has improved the success rates of IOL in the presence of an unfavourable cervix. Mechanical methods such as intracervical balloon catheters appear to be equally effective as compared to pharmacological agents and have fewer adverse effects. The process of IOL is associated with significant risks such as uterine hyperstimulation, fetal compromise, increased risk of operative deliveries and rarely rupture of the uterus. Hence, there should be a clear indication for IOL based on best available evidence, with benefits to either mother or fetus, which outweigh the perceived risks. The World Health Organization, the National Institute for Health and Clinical Care Excellence and various professional organisations have produced guidelines to assist clinicians in decision-making regarding IOL in various obstetric situations. The process of IOL should be tailored to meet the expectations and preferences of women in their unique circumstances.
Umbilical cord prolapse is an obstetrical emergency with an incidence of 1 to 6 per 1000 pregnancies, which is associated with high perinatal mortality. This chapter addresses several important aspects of cord prolapse. The definition of cord prolapse varies in the literature, and the term ‘occult cord prolapse’ is misleading. To address this, cord prolapse, cord presentation and compound cord presentation should be classified based on their positional relationship. Urgent delivery by cesarean delivery is the main treatment, except in cases where vaginal delivery is imminent. The urgency of delivery depends on the fetal heart rate pattern, with bradycardia cases requiring the most immediate intervention. Cord arterial pH declines significantly during bradycardia-to-delivery intervals, indicating potential irreversible pathology. Various manoeuvres can be used to relieve cord compression before caesarean delivery and an algorithm was proposed to guide the acute management of cord prolapse.
Instrumental vaginal deliveries can be hazardous in inexperienced hands and should be undertaken with due care and supervision. In cases of fetal distress it is essential that the instrumental delivery be straight forward as the combination of trauma and hypoxia is potentially damaging to the fetus. In general, ventouse delivery is preferred when the position is occipitotransverse or occipito-posterior to allow for autorotation of the fetal head during traction unless the accoucher is experienced in Kielland's rotational forceps delivery. Where maternal expulsive efforts may be compromised, forceps may be better than ventouse delivery. Maternal complications are higher with forceps whilst neonatal complications are more common with the use of ventouse. Although instrumental delivery is a service provided in both basic and comprehensive essential obstetric care, it is under-used in low-resource settings. After delivery, an adequate review of overall conduct of the delivery, perineal repair and postpartum care should follow.
Recommend this
Email your librarian or administrator to recommend adding this to your organisation's collection.