Reducing the time to activation of the emergency call system in operating theatres: effect of installing vertical red line indicators.

BACKGROUND: The 7th National Audit Project of the Royal College of Anaesthetists (NAP7) recommended that an emergency call system be immediately accessible in all anaesthesia locations. It is essential that all theatre team members can rapidly call for help to reduce the risk of patient harm. However, the ability of staff to activate this system in a timely manner can be affected by cluttered or unfamiliar environments and cognitive overload. One proposed strategy to enable rapid identification and activation of emergency call systems is to install a red vertical painted stripe on the wall from the ceiling to the activation button. We investigated the effect of introducing this vertical red line on activation times in operating theatres in the UK and Australia. METHODS: Operating theatre team members, including anaesthetists, surgeons, anaesthetic nurses, surgical and theatre nurses, operating theatre practitioners, and technicians, were approached without prior warning and asked to simulate activation of an emergency call. Vertical red lines were installed, and data collection repeated in the same operating theatres 4-12 months later. RESULTS: After installation of vertical red lines, the proportion of activations taking >10 s decreased from 31.9% (30/94) to 13.6% (17/125, P=0.001), and >20 s decreased from 19.1% (18/94) to 4.8% (6/125, P<0.001). The longest duration pre-installation was 120 s, and post-installation 35 s. CONCLUSIONS: This simple, safe, and inexpensive design intervention should be considered as a design standard in all operating theatres to minimise delays in calling for help.

Macroscopic barotrauma caused by stiff and soft-tipped airway exchange catheters: an in vitro case series.

BACKGROUND: Many airway management guidelines include the use of airway exchange catheters (AECs). There are reports, however, of harm from their use, from both malpositioning and in particular from the administration of oxygen via an AEC leading to barotrauma. METHODS: We used an in vitro pig lung model to investigate the safety of administering oxygen at 4 different flow rates from a high-pressure source via 2 different AECs: a standard catheter and a soft-tipped catheter. Experiments were performed with the catheters positioned either above the carina or below it at the first point of resistance to advancement (hold-up). The experiments were then repeated to produce a series of 32 cases. RESULTS: With an AEC positioned above the carina, we did not observe macroscopic lung damage after the administration of oxygen. The administration of oxygen through an AEC positioned below the carina resulted in macroscopic barotrauma regardless of the rate of oxygen delivery. Increasing speed of oxygen flow led to faster and more extensive damage. Use of an "injector" at 2.5 or 4 bar led to instantaneous macroscopic lung damage and advancement of the AEC through the lung tissue. Our observations were the same when both types of AECs were used. CONCLUSIONS: Our results are consistent with reports of harm during the use of AECs and demonstrate the risk of administering oxygen through these devices when they are positioned below the carina. An indicator, ideally made on an AEC at the time of manufacture and designed to lie at the same level as the teeth, may be useful in preventing the insertion of that AEC beyond the level of the carina and improve the safety of using such devices.

Intensive care medicine is 60 years old: the history and future of the intensive care unit.

Intensive care is celebrating its 60th anniversary this year. The concept arose from the devastating Copenhagen polio epidemic of 1952, which resulted in hundreds of victims experiencing respiratory and bulbar failure. Over 300 patients required artificial ventilation for several weeks. This was provided by 1,000 medical and dental students who were employed to hand ventilate the lungs of these patients via tracheostomies. By 1953, Bjorn Ibsen, the anaesthetist who had suggested that positive pressure ventilation should be the treatment of choice during the epidemic, had set up the first intensive care unit (ICU) in Europe, gathering together physicians and physiologists to manage sick patients - many would consider him to be the 'father' of intensive care. Here, we discuss the events surrounding the 1952 polio epidemic, the subsequent development of ICUs throughout the UK, the changes that have occurred in intensive care over the past 10 years and what the future holds for the specialty.

Team Immediate Meet tool to help intensive care staff: Staff perception of an updated version and preliminary feedback following implementation.

Intensive Care Unit staff deal with potentially traumatic cases throughout their careers. We designed and implemented a 'Team Immediate Meet' (TIM) tool, a communication aid designed to facilitate a two-minute 'hot debrief' after a critical event, provide the team with information about the normal reaction to such an event and signpost staff to strategies to help support their colleagues (and themselves). We describe our TIM tool awareness campaign, quality improvement project and subsequent feedback from staff who reported that the tool would be useful for navigating the aftermath of potentially traumatic events and could be transferable to other ICUs.

The effects of mild induced hypothermia on the myocardium: a systematic review.

Mild induced hypothermia improves neurological outcome and reduces mortality among initially comatose survivors of out-of-hospital cardiac arrest. Similar pathological processes occur in the heart and the brain, namely ischaemia followed by reperfusion injury. Animal data indicate that mild induced hypothermia results in improved myocardial salvage, reduced infarct size, reduced left ventricular remodelling and better long-term left ventricular function. Several small human studies suggest that infarct size may be reduced by mild induced hypothermia, although this has not reached significance in any human study to date. There are variable reports of harm to the myocardium caused by mild induced hypothermia, including reduced myocardial contractility and cardiac output, electrocardiographic changes and arrhythmias, especially bradycardia. These harmful effects are reversible with rewarming.

C-MAC© videolaryngoscopy: The anaesthetic assistant's view.

Although videolaryngoscopy plays a major role in the 2015 Difficult Airway Society guidelines, the impact on anaesthetic assistant working practices and training has not previously been reported. We surveyed anaesthetic assistants in our hospital to document their experience with using the C-MAC© videolaryngoscope (48 practitioners, 100% response rate). Improvements in the following were reported: patient safety 100%; ability to see whether laryngoscopy is difficult 98%; ability to anticipate the 'next step' 98%; team-working and human factors 96%; ability to call a senior anaesthetist more quickly 94%; assessment or adjustment of cricoid force application 92%, understanding of laryngeal anatomy 92%; training in intubation 98%; training in cricoid force application 87%. Concerns were primarily about local issues such as decontamination and blade availability. Ninety percent reported that the clinical benefit outweighed any additional workload. In conclusion, the C-MAC© videolaryngoscope is judged by anaesthetic assistants to confer numerous advantages for their working practice and training.