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2012, British Journal of Anaesthesia
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2 pages
1 file
Advances in Anesthesia, 2010
Canadian Journal of Anesthesia/Journal canadien d'anesthésie, 2007
Anesthesiology Clinics, 2011
International anesthesiology clinics, 2010
and Pretorius were the first to describe the use of Doppler ultrasound to identify the third part of the subclavian artery during the performance of supraclavicular brachial plexus block. 1 In their report, they described vascular echolocation using an auditory signal from Doppler ultrasound, and declared the resultant brachial plexus block highly successful and safer than conventional approaches. Three years later in 1981, Drs Abramowitz and Cohen described the first use of Doppler ultrasound to identify the axillary artery, thereby aiding in the performance of an axillary brachial plexus block for upper limb surgery. 2 Despite the availability of B-mode ultrasound imaging, visual guidance was not used at this point in the evolution of ultrasound-assisted peripheral nerve block, favoring auditory signals received from hand-held Doppler ultrasound. It was not until 1989 that images of local anesthetic spread around the axillary brachial plexus were reported. 3 This report heralded an era of ultrasonographic visualization of neural structures and perineural local anesthetics in the performance of peripheral nerve block.
Canadian Journal of Anesthesia/Journal canadien d'anesthésie, 2008
Purpose: This narrative review summarizes the evidence derived from randomized controlled trials (RCTs) offering blinded assessment and sample size justification, in order to determine the benefits associated with adjunctive ultrasonography (US) and stimulating perineural catheters for nerve blocks.
Regional Anesthesia and Pain Medicine, 2007
Background and Objectives: Educating residents in peripheral nerve blockade may impact the efficiency of a busy regional anesthesia service. Ultrasound guidance may affect the efficiency and effectiveness of nerve block. We examined the impact of ultrasound guidance on resident performance of peripheral nerve block in a regional anesthesia rotation.
Best Practice & Research Clinical Anaesthesiology, 2005
There is now an accumulation of extensive and varied experience with the use of electrical stimulation for verifying the close approximation of needle and nerve, and for increasing the corresponding success rate. The application of this experience has been of proven benefit in the teaching of regional anesthetic techniques, in the performing of difficult nerve blocks, and in the use of novel accesses, resulting in decreased morbidity and a reduced requirement for local anesthetic. Nerve stimulation can also be used in uncooperative patients and in anesthetized individuals or patients under the effects of CNS depressors, although the risk of intraneural injection of local anesthetic is not eliminated in such cases. Putting the accummulated knowledge into practice is not simply a question of using electrical stimulation to elicite an artificial muscle contraction. Sound knowledge of the anatomy of the area to be blocked, the muscle territory subsidiary to the nerve in question, the applied neurophysiology, and the pharmacology of the local anesthetic used are needed. This chapter reviews the most important aspects, from nerve 1521-6896/$ -see front matter Q (J. De Andrés). anatomy and physiology, to electrical features of the needle, and devices used for the updated clinical application of nerve stimulation in the practice of plexus regional anesthesia.
Regional Anesthesia and Pain Medicine, 2009
Ultrasound guidance has become popular for performance of regional anesthesia and analgesia. This systematic review summarizes existing evidence for superior risk to benefit profiles for ultrasound versus other techniques. Medline was systematically searched for randomized controlled trials (RCTs) comparing ultrasound to another technique, and for large (n 9 100) prospective case series describing experience with ultrasound-guided blocks. Fourteen RCTs and 2 case series were identified for peripheral nerve blocks. No RCTs or case series were identified for perineural catheters. Six RCTs and 1 case series were identified for epidural anesthesia. Overall, the RCTs and case series reported that use of ultrasound significantly reduced time or number of attempts to perform blocks and in some cases significantly improved the quality of sensory block. The included studies reported high incidence of efficacy of blocks with ultrasound (95%Y100%) that was not significantly different than most other techniques. No serious complications were reported in included studies. Current evidence does not suggest that use of ultrasound improves success of regional anesthesia versus most other techniques. However, ultrasound was not inferior for efficacy, did not increase risk, and offers other potential patient-oriented benefits. All RCTs are rather small, thus completion of large RCTs and case series are encouraged to confirm findings.
The Turkish Journal of Anaesthesiology and Reanimation
Regional anaesthesia practice has changed dramatically, especially in the last 2-3 decades. Anaesthesiologists are far beyond doing only extremity and/or central neuraxial blocks. Unquestionably, the introduction of ultrasound into regional anaesthesia practice has a pivotal role in the so-called "renaissance" of regional anaesthesia today. Ultrasound allowed us to see not only the nerves themselves but also the fascial planes where nerves are located. In our own clinical practices, the diversity of the blocks is nothing comparable to what we used to do 15-20 years ago. Besides doing randomised controlled studies to test the newly introduced blocks, we often publish about selective blocks as case reports or short editorials just to inform the anaesthesia community, to let them know that all these different blocks are technically feasible and patients benefit a lot from receiving these selective blocks. Moreover, we need to recognise that with ultrasound guidance and improved understanding of sonoanatomy, new techniques to deliver local anaesthetics to target nerves will inevitably emerge ad hoc in expert hands with or without scientific publications. Today, we are discussing with Dr K.V. from Harvard University some essential issues about the future of regional anaesthesia, trying to answer the question whether there will be a block for every single patient entering the operating theatres to provide anaesthesia or analgesia or some benefits beyond anaesthesia. Do you think ESPB has changed the practice of regional anaesthesia and will it survive the test of time? Y.G. Erector Spina Plane Blocks (ESPB) is still a very young block introduced in 2016. There are thousands of publications trying ESPB almost for any indication in the operating room. Today, it is an integral part of our anaesthesia practice for breast surgery and included in the armamentarium of anaesthesiologists for thoracic surgery. It has always been challenging to perform regional anaesthesia for cardiac surgery due to anticoagulant use in the peri-operative period. Blocks like ESPB now offer an option for providing perioperative analgesia for cardiac surgery patients. For paediatric age group, ESPB has been shown to be very effective for both thoracic and abdominal surgeries. ESPB offered an option for spine surgery to reduce opioid requirement. I personally think ESPB is more effective in thoracic than lumbar levels and in the same manner in paediatrics compared to adults. This information comes from our extensive clinical experience with ESPB in different clinical scenarios. Generally speaking, ESPB has been a very successful adjunct to anaesthesia practice for many anaesthesiologists all over world due to technical simplicity and safety. K.V. OK-let's make this discussion more provocative… Yes, this may be a new block technique by designation and scientific interest, but to challenge the audience, it is not really a new block by injectate location/ distribution. In fact, the majority of paravertebral blocks (before or after ultrasound guidance) that fail to reach their intended target-the proper paravertebral space, deliver inadvertently the local anaesthetic mixture into planes, currently described and studied as retrolaminar plane, erector spinae plane, mid-point, even TLIP
Although regional anaesthesia has become safer, there are an increasing number of articles regarding complications of regional blocks. During the last few years, many authors have suggested the use of ultrasound to minimize the appearance of complications. This review was performed, through a Medline research, to evaluate articles concerning ultra-sound and locoregional anaesthesia published until April 2005. A total of 39 articles were reviewed. Technical proce-d u res, the use of ultrasound guidance in epidural anesthesia, the application of this technique for peripheral nerve blocks, and its indications in pregnancy and in pediatric patients were considered. In these articles, all of the authors focused on the advantages of ultrasound guidance. With the help of this technique, correct catheter placement as close to the target as possible was obtained; the spread of local anesthetic administered around the nerve and its roots can be visualized, reducing the doses needed; in addition, it is possible to avoid the most common complications, such as intravascular injection, dura mater puncture, hematoma formation, and nerve injury. Ultrasound guidance is useful in facilitating peripheral and neuroaxial blocks and offers direct visualization of the target, adjacent stru c t u res, and local anesthetic spread. The advantages also include a decreased rate of complications and faster onset of blocks. Fi n a l l y, ultra-sound measurements can even result in suggestions to modify established block technique.
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