British journal of anaesthesia
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Review
Role of GABAA receptor subtypes in the behavioural effects of intravenous general anaesthetics.
Since the introduction of general anaesthetics into clinical practice, researchers have been mystified as to how these chemically disparate drugs act to produce their dramatic effects on central nervous system function and behaviour. Scientific advances, particularly during the last 25 years, have now begun to reveal the molecular mechanisms underpinning their behavioural effects. ⋯ Advances in molecular pharmacology and in genetic manipulation of rodent genes reveal that different subtypes of the GABAA receptor are responsible for mediating particular aspects of the anaesthetic behavioural repertoire. Such studies provide a better understanding of the neuronal circuitry involved in the various anaesthetic-induced behaviours and, in the future, may result in the development of novel therapeutics with a reduced propensity for side-effects.
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Review
Quality, safety, and outcomes in anaesthesia: what's to be done? An international perspective.
This article reviews of some of the key topics and challenges in quality, safety, and the measurement and improvement of outcomes in anaesthesia. The topics were selected based on the perspective of an individual with quality and safety expertise and recent experience of the specialty in both the UK and USA. The review does not seek to be exhaustive or systematic, but to highlight current areas of concern and potential solutions. ⋯ These levels are as follows: the microsystem or patient and individual clinician perspective; the meso or hospital perspective; and the macro or government and policy perspective. Topics covered include medication safety, changes in approaches to patient safety, payment reform, longer term measurement of outcomes, large-scale improvement programmes, the ageing population, and burnout. The article begins with a section on the success of the specialty of anaesthesia in improving the quality, safety, and outcomes for our patients, and ends with a look to future developments, including greater use of technology and patient engagement.
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In the last 25 yr, there have been several advances in the safe management of the airway. Videolaryngoscopes and supraglottic airways, now in routine use by new trainees in anaesthesia, have had their genesis in the recent past. The 4th National Audit Project of the Royal College of Anaesthetists and the Difficult Airway Society published in 2011 a seminal report that has influenced airway management worldwide. ⋯ Current recommendations are that it be applied, but it should be released rapidly should airway difficulty be encountered. The need to prevent hypoxaemia by preoxygenation has long been recognized, but the role of high-flow nasal oxygen in anaesthesia is now being realized and developed. Clinicians must decide how novel therapies and long-standing practices are adapted to best meet the needs of our patients and prevent harm during airway management.
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The past two decades have seen an increasing recognition that the delivery of safe surgery with low complication rates and good long-term outcomes is a team endeavour embracing the whole patient care pathway. The key role of the anaesthetist in managing the patient through the surgical process is widely understood and has driven the emergence of perioperative medicine. In parallel with these developments there has been a sea change in the organisation of the care of patients presenting for elective abdominal aortic aneurysm (AAA) repair. ⋯ These changes paralleled and in some cases led the wider evolution of the role of the anaesthetist in perioperative medicine. The mortality from infrarenal AAA repair in the UK decreased to 2.4% by 2012. This improvement reflects changes in perioperative care supported and in some cases led by anaesthetists.
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Randomized Controlled Trial
Individualized positive end-expiratory pressure in obese patients during general anaesthesia: a randomized controlled clinical trial using electrical impedance tomography.
General anaesthesia leads to atelectasis, reduced end-expiratory lung volume (EELV), and diminished arterial oxygenation in obese patients. We hypothesized that a combination of a recruitment manoeuvre (RM) and individualized positive end-expiratory pressure (PEEP) can avoid these effects. ⋯ German clinical trials register DRKS00004199, www.who.int/ictrp/network/drks2/en/ .