Anaesthesia and intensive care
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Anaesth Intensive Care · Jul 2022
Randomized Controlled TrialEffects of an open lung ventilatory strategy on lung gas exchange during laparoscopic surgery.
In general anaesthesia, early collapse of poorly ventilated lung segments with low alveolar ventilation-perfusion ratios occurs and may lead to postoperative pulmonary complications after abdominal surgery. An 'open lung' ventilation strategy involves lung recruitment followed by 'individualised' positive end-expiratory pressure titrated to maintain recruitment of low alveolar ventilation-perfusion ratio lung segments. There are limited data in laparoscopic surgery on the effects of this on pulmonary gas exchange. ⋯ The sevoflurane arterial/alveolar partial pressure ratio and alveolar deadspace fraction were unchanged from baseline and remained similar between groups (mean (standard deviation) control group = 0.754 (0.086) versus intervention group = 0.785 (0.099), P = 0.319), while the arterial oxygen partial pressure/fractional inspired oxygen concentration ratio was significantly higher in the intervention group at the second timepoint (control group median (interquartile range) 288 (234-372) versus 376 (297-470) mmHg in the intervention group, P = 0.011). There was no difference between groups in the sevoflurane consumption rate. The efficiency of sevoflurane uptake is not improved by open lung ventilation in laparoscopy, despite improved arterial oxygenation associated with effective and sustained recruitment of low alveolar ventilation-perfusion ratio lung segments.
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Anaesth Intensive Care · Jul 2022
Factors associated with intraoperative intravenous catheter extravasation in children.
SummaryThis retrospective study aimed to determine the incidence of and factors associated with peripheral intravenous extravasation in paediatric patients in the intraoperative setting. We conducted a retrospective study of 56,777 patients who underwent general anaesthesia and had peripheral intravenous catheter placement at Cincinnati Children's Hospital between 1 January 2015 and 1 January 2017. Data collected included age, American Society of Anesthesiologists Physical Status Classification, catheter site, number of cannulation attempts, ultrasound use for cannulation, surgery duration, and surgery class. ⋯ Of those 40 catheters, 47.5% (n = 19) were placed using ultrasound and 37.5% (n = 15) required more than one cannulation attempt. In multivariable analysis, peripheral intravenous catheter extravasation was associated with American Society of Anesthesiologists Physical Status Classification (3, 4, 5) versus (1, 2) (odds ratio 2.42 (95% CI 1.08 to 5.41)), inpatient versus outpatient surgeries (odds ratio 2.99 (95% CI 1.31 to 6.81)), and intravenous catheters placed with ultrasound guidance (odds ratio 8.01 (95% CI 4.12 to 15.57)). Our study identified factors associated with intraoperative peripheral intravenous extravasation, and will help develop mitigation strategies to minimise harm to patients.
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Anaesth Intensive Care · Jul 2022
A report on virtual 'Can't intubate, can't oxygenate' conference workshops at the 2021 Annual Scientific Meeting of the Australian and New Zealand College of Anaesthetists.
The COVID-19 pandemic has had profound implications for continuing medical education. Travel restrictions, lockdowns and social distancing in an effort to curb spread have meant that medical conferences have been postponed or cancelled. When the Australian and New Zealand College of Anaesthetists made the decision to commit to a fully virtual 2021 Annual Scientific Meeting, the organising committee investigated the viability of presenting a virtual 'Can't intubate, can't oxygenate' workshop. ⋯ Feedback focused on previously unperceived advantages of virtual technical skills workshops, including convenience, equitable access and the reusable airway model. Disadvantages noted by respondents included lack of social interaction, inability to trial more expensive airway equipment, and some limitations of the ability of facilitators to review participants' technique. Despite limitations, in our experience, virtual workshops can be planned with innovative solutions to deliver technical skills education successfully.
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Anaesth Intensive Care · Jul 2022
Case ReportsAirway emergency from megaoesophagus: A rare complication of an adjustable gastric band.
A 77-year-old lady with a laparoscopic adjustable gastric band (LAGB), implanted 12 years earlier for obesity, developed an unusual but almost fatal complication, characterised by dysphonia and stridor within minutes and a tensely swollen anterior neck. The condition mimicked haemorrhage into the subcutaneous tissues of the neck, and the airway was secured with an awake fibreoptic intubation. Subsequent computed tomography imaging of the abdomen and chest revealed megaoesophagus with dilatation up to 7 cm, proximal to the gastric band. ⋯ In patients with LAGB in situ, fluid should be removed from the band for any suspected device-associated symptoms such as severe vomiting, severe gastro-oesophageal reflux or neck swelling and respiratory distress. When there is radiological evidence of gross oesophageal dilatation or a high likelihood of an obstructive pathology at the level of the band, a careful nasogastric tube decompression may also resolve reflux, neck swelling or respiratory distress. A complication associated with LAGB should be considered in a patient with unexplained neck swelling or other features of airway obstruction who has an LAGB in situ.
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Anaesth Intensive Care · Jul 2022
The association between unanticipated prolonged post-anaesthesia care unit length of stay and early postoperative deterioration: A retrospective cohort study.
This study aimed to investigate whether there was an association between an unanticipated prolonged post-anaesthesia care unit (PACU) length of stay and early postoperative deterioration, as defined as the need for a rapid response team activation, within the first seven days of surgery. We conducted a single-centre retrospective cohort study of adult surgical patients, who stayed at least one night in hospital, and were not admitted to critical care immediately postoperatively, between 1 July 2017 and 30 June 2019. A total of 11,885 cases were analysed. ⋯ Other factors associated with rapid response team activation included non-elective surgery (OR 1.78, P < 0.001) and theatre length of stay (OR per increment 1.61, P < 0.001). PACU length of stay was also independently associated with predefined complications and unplanned intensive care unit admission postoperatively. In our cohort, an unanticipated prolonged PACU length of stay of over one hour was associated with an increased incidence of rapid response team activation in the first seven days postoperatively.