International journal of obstetric anesthesia
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Int J Obstet Anesth · Oct 2011
ReviewNeuraxial blockade for external cephalic version: a systematic review.
The desire to decrease the number of cesarean deliveries has renewed interest in external cephalic version. The rationale for using neuraxial blockade to facilitate external cephalic version is to provide abdominal muscular relaxation and reduce patient discomfort during the procedure, so permitting successful repositioning of the fetus to a cephalic presentation. This review systematically examined the current evidence to determine the safety and efficacy of neuraxial anesthesia or analgesia when used for external cephalic version. ⋯ Neuraxial blockade improved the likelihood of success during external cephalic version, although the dosing regimen that provides optimal conditions for successful version is unclear. Anesthetic rather than analgesic doses of local anesthetics may improve success. The findings suggest that neuraxial blockade does not compromise maternal or fetal safety during external cephalic version.
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Int J Obstet Anesth · Oct 2011
Assessment of coagulation in the obstetric population using ROTEM® thromboelastometry.
Assessment of maternal coagulation to determine suitability for neuraxial anaesthesia and management of obstetric haemorrhage remains a challenge. Thromboelastography provides point of care patient assessment of the viscoelastic properties of whole blood clotting and can assist the clinician in haemostatic decision-making. The study aim was to determine the ROTEM® thromboelastometer 95% reference limits for third trimester parturients and to compare these with non-pregnant female controls. ⋯ ROTEM® thromboelastometry clearly demonstrates the hypercoagulability of pregnancy. Formal reference ranges for ROTEM® that may be potentially useful in the haemostatic management of the parturient are presented.
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Despite widespread enthusiasm for using lumbar ultrasound in obstetrics, there are some who believe it is expensive and time-consuming, with undetermined risks and uncertain benefits. For decades, anesthesiologists have striven to perfect the identification and cannulation of the epidural space using skills learned during training and early clinical practice. These skills include knowledge of the relevant anatomy and detection of subtle tactile clues that aid successful placement of an epidural catheter. ⋯ If rapid health cost growth persists, one out of every four dollars in the US national economy will be tied up in the health system by 2025. Do obstetric anesthesiologists want to add to these costs by using unnecessary and expensive equipment? Although many feel that diagnostic ultrasound in obstetrics is safe, some argue that we have yet to perform an appropriate risk analysis for lumbar ultrasound during pregnancy. The issue of ultrasound bio-safety needs to be considered before we all jump on the ultrasound bandwagon.
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Int J Obstet Anesth · Oct 2011
Randomized Controlled TrialHemodynamic effects of a right lumbar-pelvic wedge during spinal anesthesia for cesarean section.
Aortocaval compression is a major cause of maternal hypotension. A randomized controlled trial was designed to determine the effectiveness of a mechanical intervention using a right lumbar-pelvic wedge in preventing hypotension after spinal anesthesia for cesarean delivery. ⋯ In our study population the use of right lumbar-pelvic wedge was not effective in reducing the incidence of hypotension during spinal anesthesia for cesarean section. Patients in whom the wedge was used had higher systolic blood pressure values during the first 5 min of anesthesia and fewer episodes of nausea. The risk of hypotension remains substantial.
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Care of pregnant migrants is a considerable challenge for all health care workers and health systems. Maternal mortality and serious morbidity are both greatly increased among migrants in western countries, particularly in Africans and asylum seekers. While in many instances, migrants are healthier than native populations and have better perinatal outcomes, this is inconsistent and poorer outcomes are described in many groups. ⋯ Accordingly, improvement in outcome requires a multifaceted approach with a focus on early access to antenatal services and enhanced medical screening and surveillance for detection and optimisation of comorbid conditions. Provision and/or acceptance of analgesia in labour have not been well researched but existing data are sufficient to suggest that some migrant groups do not receive equivalent pain relief during labour. Provision of information and translation services are important components in improvement of standards of care.