Anaesthesia and intensive care
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Anaesth Intensive Care · Mar 2011
Audit of initial use of the ultrasound-guided transversus abdominis plane block in children.
The extent of dermatomal block post transversus abdominis plane block is described in adults as T7-L1; other authors argue extent above T10 is infrequent (supra-iliac 20 ml injection). A paediatric guideline recommends this block for upper and lower abdominal surgery using 0.2 ml/kg. We aimed (through prospective audit) to document the multi-level block achieved with ultrasound-guided transversus abdominis plane block in children having abdominal surgery, during a departmental training period. ⋯ One patient (3% of assessed blocks) had no block to ice at 60 minutes, but required no postoperative analgesia. Ultrasound-guided transversus abdominis plane blocks performed by supra-iliac approach and novice operators produced lower abdominal sensory blockade in children of usually 3 to 4 dermatomes, and should be offered for lower abdominal surgery only, as only 25% had upper abdominal block extension. The optimal local anaesthetic dose/volume, duration of effect and utility for these blocks in relation to peripheral and neuraxial blockade needs clarification.
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Anaesth Intensive Care · Mar 2011
Scientific publications in international anaesthesiology journals: a 10-year survey.
Significant growth has been seen in the field of anaesthesiology in recent decades. The current geographic distribution of the publications on anaesthesia research may be different from ten years ago. We performed this literature survey to examine the national origin of articles published in international anaesthesiology journals and to evaluate their contribution to anaesthesia research. ⋯ Denmark, Switzerland and Finland had the largest number of articles per capita. Anesthesia & Analgesia published the most number of articles from 2000 to 2009, followed by Anesthesiology, Pain and the British Journal of Anaesthesia. The numbers of clinical studies and randomised controlled trials decreased markedly from 2000 to 2009.
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Anaesth Intensive Care · Mar 2011
Comparative StudyResponses to dural puncture during institution of combined spinal-epidural analgesia: a comparison of 27 gauge pencil-point and 27 gauge cutting-edge needles.
Pencil-point spinal needles are popular for combined spinal-epidural analgesia because they cause less dural puncture headache than cutting-edge spinal needles. However many parturients move, grimace, vocalise or experience paraesthesia or dysaesthesia during dural puncture when performing 'needle through needle' combined spinal-epidural analgesia. We compared dural puncture responses induced by pencil-point and cutting-edge needles (both 27 gauge). ⋯ Pooled data analysis revealed that pencil-point and cutting-edge needles induced grimacing and movement in 17 (22%) and 2 (5%), spontaneous vocalisation in 4 (5%) and 1 (3%) and was perceived by 13 (17%) and 3 (8%) parturients (P < 0.025, P=NS, P=NS), respectively. Overall, 34 and 6 objective and subjective patient responses (P < 0.005) occurred when inserting these needles, respectively. Dural puncture by a 27 gauge pencil-point needle inserted 'needle through needle' when instituting combined spinal-epidural analgesia induces more iatrogenic responses than a 27 gauge cutting-edge needle.
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Anaesth Intensive Care · Mar 2011
Case ReportsThe use of rocuronium in a patient with cystic fibrosis and end-stage lung disease made safe by sugammadex reversal.
While the pharmacology of sugammadex has been extensively reviewed, there is limited literature regarding its use in specific clinical settings. Several case reports describe its use in patients with the potential for postoperative respiratory dysfunction; in the settings of myasthenia gravis, Duchenne muscular dystrophy and myotonic dystrophy. We describe the use of sugammadex in a patient with severe bronchiectasis related to cystic fibrosis who required neuromuscular block for percutaneous endoscopic gastrostomy insertion. ⋯ However we wished to ensure complete neuromuscular block reversal for this short duration procedure in this high-risk patient and also to avoid the side-effects of traditional reversal agents. We therefore planned in advance to use sugammadex for neuromuscular block reversal, and this approach proved successful. Overall, the combination of rocuronium and sugammadex improved perioperative surgical and anaesthetic management in this patient.
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Anaesth Intensive Care · Mar 2011
Analysis of human cultured myotubes responses mediated by ryanodine receptor 1.
Malignant hyperthermia is a life-threatening condition caused by autosomal dominant mutations in the ryanodine receptor type 1 gene. Identifying patients predisposed to malignant hyperthermia is done through the Ca-induced Ca release test in Japan. We examined the intracellular calcium concentration in human cultured muscle cells and compared the sensitivity of myotubes to ryanodine receptor type 1 activators based on the Ca-induced Ca release rate. ⋯ The calculated cut-off points of EC50 values for caffeine, halothane and 4-CmC were 3.62 mM, 2.28 mM and 197 microM, respectively. An increased sensitivity to ryanodine receptor type 1 activators was seen in myotubes in the accelerated group. This functional test on human cultured myotubes indicates that the alteration of their intracellular Ca2+ homeostasis may identify the predisposition to malignant hyperthermia.