Anaesthesia and Intensive Care最新文献

Preoperative assessment of functional capacity with the six-minute walk test (6MWT) allows for estimation of surgical risk and targeted triage to prehabilitation services. Patient with abdominal and pelvic cancers have worse preoperative function compared with the general population. However, six-minute walk distance (6MWD) reference values from cancer patients are unknown, which limits the interpretation of 6MWT in this population. This study aimed to establish an explanatory reference value model for preoperative 6MWD in patients with abdominal or pelvic cancers undergoing elective surgery. Adult patients undergoing surgery for abdominal or pelvic cancers at major international hospitals were included. The 6MWT was assessed before surgery using a standardised protocol. Anthropometric data including age, sex, height, weight and body mass index (BMI) were collected and included in multiple linear regression analysis to model preoperative 6MWD. A total of 742 patients were included. Age, height and BMI were correlated with 6MWD. Six regression models were estimated, including two from the entire cohort, two from the subset of males and two from the subset of females. A sex-neutral model was the most representative, explaining 15% of the variance in 6MWD (6MWD = 761.00-3.00 * Age (years) -2.86 * BMI (kg/m²) - 48.09 * Sex (M1, F2)). The explored regression models, using anthropometric variables, poorly explained the variance between measured and modelled 6MWD, which suggests that these models have no clinical utility in the cancer population. Consideration of additional, non-anthropometric variables may improve regression modelling of preoperative 6MWD in patients in abdominal and pelvic cancers.

The Complex Decision Pathway (CDP) is a novel perioperative shared decision-making pathway that was established in the Bay of Plenty, New Zealand in 2018. Unique features of the pathway include the use of a structured communication tool to facilitate a goals-of-care conversation in addition to medical assessment, and the use of a tikanga Māori framework for Māori patients. From May 2019 until May 2022, 81 patients attending the CDP clinic were recruited to a prospective study of their demographics, health status and experience at the time of presentation, along with outcomes and opinions over the subsequent 12 months. Participants were mostly elderly and frail with multiple comorbidities, and just over half of participants chose to undergo surgery. Participants who chose, or were recommended, not to undergo surgery were older, more comorbid and had worse outcomes over the subsequent 12 months. Qualitative data suggested an overall positive patient experience of the pathway, and an economic analysis demonstrated its cost-effectiveness. Overall, the data presented here suggested that the CDP assisted in risk-stratifying patients into operative and non-operative groups, provided a positive patient experience, and was a cost-effective intervention.

A 'can't intubate, can't oxygenate' (CICO) situation is an uncommon and time-critical emergency. Many institutions have adopted a 'scalpel-bougie-endotracheal tube (ETT)' technique based on evidence produced by the 4th National Audit Project of the Royal College of Anaesthetists and 2015 Difficult Airway Society guidelines. We made a modification to the traditional 'scalpel-bougie-ETT' technique, using a shortened bougie and replacing the ETT with a cuffed Melker airway in a preassembled device (called 'Secure Airway for Front-of-neck Emergencies' (SAFE airway device)), which we felt might reduce cognitive load on a single operator in an emergency CICO situation. We then performed a simulation crossover study using 20 volunteer anaesthetic doctors to compare this modification with the traditional technique. After a standardised pre-recorded video demonstration, participants performed simulated tube insertion using both the standard 'scalpel-bougie-ETT' technique and the SAFE airway device in randomised order. Participants were filmed for accurate timestamping. The primary outcome was time to successful tube insertion while secondary outcomes included number of attempts and ease of insertion. Overall time to cuff inflation was shorter, statistically and practically, with the SAFE airway device compared with the ETT (median 30 vs. 52 seconds, P < 0.001). Twenty-five percent of participants required multiple attempts using the ETT method versus 5% using the SAFE airway device, which was also rated as being easier to use. This study demonstrates that the SAFE airway device was fast, effective, easy to use and acceptable to airway practitioners in a simulated manikin environment. These findings indicate that further studies of the SAFE airway device are warranted.

Emergence delirium, characterised by inconsolable crying, perceptual disturbances and thrashing, occurs in young children during the recovery phase from general anaesthesia. Our aim was to determine whether timing of laryngeal mask airway removal (deeply anaesthetised versus awake) influenced the incidence of emergence delirium in children after tonsillectomy. A single-centre, randomised controlled trial was conducted at Albury Wodonga Health, a regional hospital in Australia. Included patients were two to seven years old, American Society of Anesthesiologists physical status classification 1-2, undergoing elective tonsillectomy (with or without adenoidectomy or grommet insertion) under general anaesthesia. Patients were randomised to have their laryngeal mask removed whilst deeply anaesthetised (in the operating theatre) or after awakening (in the post-anaesthesia care unit (PACU)). Pediatric Anesthesia Emergence Delirium score was determined at 5 and 20 min after eye opening, and frequency of complications (cough, vomiting, excessive salivation, oxygen desaturation and laryngospasm) in the PACU were recorded. Sixty-two patients were randomised to deep laryngeal mask removal and 62 to awake. In the awake versus deep groups, 33 (53%) versus 40 (65%) participants had emergence delirium at 5 min (odds ratio (OR) 0.63, 95% confidence interval (CI) 0.30 to 1.29, P = 0.20). At 20 min, 18 (29%) vs. 19 (31%) participants had emergence delirium (OR 0.93, 95% CI 0.43 to 2.00, P = 0.88). A greater incidence of most PACU complications was observed in the awake versus deep group; cough (24% vs. 8%), vomiting (8% vs. 0%), excessive salivation (23% vs. 8%) and oxygen desaturation (16% vs. 0%). We found no significant difference between the two techniques in terms of preventing emergence delirium. However, other PACU complications were more frequent with awake removal.

The coronavirus disease 2019 (COVID-19) pandemic in Australia resulted in significant additional infection control precautions for consumers and the health workforce. Prior to widespread vaccine availability, substantial changes were made to the operating theatre management of patients presenting for surgery with suspected or diagnosed COVID-19. This study aimed to calculate the actual costs of operating theatre care for patients with confirmed or suspected COVID-19. Data were prospectively collected for all patients presenting for surgery with confirmed or suspected COVID-19 at the Royal Brisbane and Women's Hospital. Information collected included patient characteristics, surgical and anaesthesia details, equipment, theatre utilisation, staffing and cleaning. The associated variable costs and usual costs of care were calculated according to the Australian National Efficient Price. We compared estimated usual costs with those estimated for patients with confirmed or suspected COVID-19. Twenty-four patients with suspected COVID-19 infection underwent surgery between May 2020 and February 2021. Cost analysis revealed a mean (standard deviation (SD), range) increase in costs of providing perioperative care for COVID-19 suspect patients of A$2252 (A$2570, A$315.85-10,398); that is, a mean of 207.5% more than usual care costs. This was primarily due to the increased number of staff and time required to complete these cases with appropriate infection control.

Medical emergency team (MET) activations were designed to improve patient safety and outcomes by providing timely and specialised care to patients experiencing clinical deterioration. The primary objective of this study was to describe the association between MET events in the early (24-h) postoperative period and in-hospital mortality as well as length of stay. A retrospective data linkage study was performed of prospectively collected data from patient administrative data and the MET database at Launceston General Hospital located in Tasmania, Australia. Over five years, 109,116 operating room cases fulfilled the inclusion criteria, of which 85,235 were the first operating room case in a unique admission episode after exclusions. A MET event within the first 24 h after surgery was associated with an increased median length of stay from 0.16 to 4.00 days with a median difference of 2.96 days (95% confidence interval (CI) 2.86 to 3.08) and more than doubled the hazard of mortality for each day a patient remained in hospital after completion of surgery (hazard ratio 2.3, 95% CI 1.9 to 2.8). Emergency surgical patients were at higher risk. Of recorded MET triggers, cardiac arrest was the most strongly associated event with in-hospital mortality. Notably, staff concern as a trigger for MET activation was associated with a hazard nearly as great as chest pain. Other MET triggers that reached statistical significance were bleeding, respiratory rate more than 36/min, peripheral oxygen saturations less than 84% and systolic blood pressure less than 80 mmHg. Despite being frequent, MET events should be regarded as a serious marker of an adverse patient journey that may warrant higher resource allocation.

Prescription-event monitoring (PEM) is the current gold standard for determining the risk of rare drug side-effects and comparing the risk between agents; however, spontaneous or prompted reporting schemes have low case-detection rates and exposure may be difficult to estimate. A novel method is described that allows a comparative adverse event rate between two drugs to be estimated-based on patterns of cross-reactivity-requiring only a sample of cases and no direct knowledge of drug exposure rates. Agreement was compared between the novel method and historical estimates of risk using PEM for comparative risk of rocuronium versus vecuronium anaphylaxis. The novel method was applied to a sample of patients investigated by the Western Australian Anaesthetic Drug Reaction Clinic over a 21-year period. Relative population exposure was estimated from the number of patients with either rocuronium or vecuronium anaphylaxis subsequently shown to be reactive on skin testing to both agents. This was used to correct the total number of cases of hypersensitivity triggered by each agent. Measures of spread were by bootstrap sampling. Historical estimates were gathered by literature review. Additional comparisons of agreement between estimates made by the novel method and PEM were made using cross-reactivity data and PEM rates reported in the literature. There was agreement between estimates of comparative anaphylaxis risk between the novel method and PEM. Two-hundred and twenty-eight cases of anaphylaxis were observed, 89% caused by rocuronium. Patients reactive to both agents were more likely to be female, and had a higher acute mast cell tryptase level. Patients with a history of rocuronium anaphylaxis were more likely to be reactive to one agent only (69% vs. 33%, P < 0.01). It was estimated that rocuronium was prescribed 3.9 times more frequently than vecuronium. When the observed proportion of cases was corrected for exposure rate, the risk of rocuronium anaphylaxis was 2.2 times that of vecuronium (95% confidence interval 1.7 to 2.8). The median risk from historical estimates was 4.7 times, while the previous PEM estimate in Western Australian was 3.0 times. Using a subgroup of patients susceptible to the same side-effect of two drugs, the relative exposure rate and corrected comparative risk of an adverse effect can be estimated for a population. Using this technique, which requires assessment only of cases to estimate relative exposure rates, we have estimated that the risk of anaphylaxis from rocuronium to be 2.2 times that of vecuronium in Western Australia.