International journal of obstetric anesthesia
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Int J Obstet Anesth · Apr 2012
Randomized Controlled Trial Comparative StudyA randomized controlled trial comparing intrathecal morphine with transversus abdominis plane block for post-cesarean delivery analgesia.
Intrathecal morphine is an effective analgesic post-cesarean delivery; however, it may be contraindicated or unsuitable in some patients. We compared the efficacy and side effects of intrathecal morphine with an ultrasound-guided transversus abdominis plane (TAP) block in a randomized, controlled, double-blinded trial. The primary outcome was the morphine equivalents dose used in the first 24 h post-surgery. Secondary outcomes were pain scores and side effects, including pruritus, sedation, nausea and vomiting. ⋯ In this trial, the TAP block was associated with greater supplemental morphine requirements and higher pain scores than intrathecal morphine but fewer opioid-related side effects. The TAP block may be a reasonable alternative when intrathecal morphine is contraindicated or not appropriate.
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Int J Obstet Anesth · Apr 2012
Randomized Controlled TrialA sequential compression mechanical pump to prevent hypotension during elective cesarean section under spinal anesthesia.
Spinal anesthesia is a standard technique for cesarean section but can cause hypotension which may be related to venous pooling secondary to progesterone-induced decreases in vascular tone. This study investigated the use of a sequential compression mechanical pump with thigh-high sleeves with compression cycles timed to venous refilling. We hypothesized that this would recruit pooled venous blood from the lower limbs, maintain the central blood volume and thus decrease the incidence of hypotension. ⋯ The use of a sequential compression mechanical pump that detects venous refilling and cycles accordingly, reduced the incidence and severity of hypotension after spinal anesthesia for cesarean section.
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Int J Obstet Anesth · Apr 2012
The Analgesia Nociception Index: a pilot study to evaluation of a new pain parameter during labor.
Objective pain assessment that is not subject to influences from either cultural or comprehension issues is desirable. Analysis of heart rate variability has been proposed as a potential method. This pilot study aimed to assess the performance of the PhysioDoloris™ analgesia monitor which calculates an Analgesia Nociception Index derived from heart rate variability. It was compared with visual analogical pain scores. ⋯ The Analgesia Nociception Index has an inverse linear relationship with visual analogical pain scores. Further studies are necessary to confirm the results of this pilot study and to look at the influence of epidural analgesia on the Analgesia Nociception Index.
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Int J Obstet Anesth · Apr 2012
Case ReportsAcute intrathecal haematoma following neuraxial anaesthesia: diagnostic delay after apparently normal radiological imaging.
We describe a case of intrathecal haematoma following combined spinal-epidural anaesthesia for caesarean section. The parturient was previously well with no risk factors for haematoma development. ⋯ Incorrect interpretation of clinical findings and magnetic resonance imaging contributed to the delay in definitive treatment. We discuss the difficulties in diagnosis, image interpretation and the need for a specialist opinion when abnormal neurological symptoms persist despite apparently normal imaging.