Guidelines to the Practice of Anesthesia – Revised Edition 2019

Canadian Journal of Anesthesia/Journal canadien d'anesthésie - The Guidelines to the Practice of Anesthesia Revised Edition 2019 (the Guidelines) were prepared by the Canadian...     

Special announcement: Guidelines to the Practice of Anesthesia—Revised Edition 2019

Canadian Journal of Anesthesia/Journal canadien d'anesthésie -     

Imaging in polytrauma – Principles and current concepts

Imaging forms a crucial component in reducing mortality of polytraumatized patients by aiding appropriate diagnosis and guiding the emergency and definitive treatment. With the exponential expansion in the radiological armamentarium and introduction of protocols like Extended focused assessment with sonography for trauma (EFAST) and Whole body Computed tomography (WBCT), the role of imaging has considerably increased. Emergency imaging protocols should be done for rapid diagnosis of life-threatening injuries allowing simultaneous evaluation and resuscitation. Subsequent comprehensive imaging is essential to diagnose the often clinically missed injuries to reduce the overall morbidity. Imaging protocols must adapt to the patient’s clinical scenario, which can be dynamically changing. Each trauma team should devise clear guidelines, protocols, and algorithms suitable for their center depending on the local availability of types of equipment and expertise. Radiologists must efficiently communicate and adopt patient-centered approach to ensure early appropriate care to these severely injured patients. Future research should involve multicentre studies to formulate the most appropriate imaging protocol in polytrauma to increase diagnostic accuracy and thereby reduce patient mortality.     

Local anaesthetic dosage of peripheral nerve blocks in children: analysis of 40 121 blocks from the Pediatric Regional Anesthesia Network database

Background

The knowledge regarding appropriate dosage of local anaesthetics for peripheral nerve blocks in children is very scarce. The main objective of the current investigation was to evaluate dosing patterns of local anaesthetics in children receiving peripheral nerve blocks across multiple paediatric hospitals in the USA. We also sought to estimate the incidence of local anaesthetic systemic toxicity.

Is Neuraxial Anesthesia Safe in Patients Undergoing Surgery for Treatment of Periprosthetic Joint Infection?

BackgroundThere is concern that neuraxial anesthesia in patients undergoing surgery for treatment of a periprosthetic joint infection (PJI) may increase the risk of having a central nervous system infection develop. However, the available data on this topic are limited and contradictory.Questions/purposesWe wished to determine whether neuraxial anesthesia (1) is associated with central nervous system infections in patients undergoing surgery for a PJI, and (2) increases the likelihood of systemic infection in these patients.MethodsAll 539 patients who received neuraxial or general anesthesia during 1499 surgeries for PJI from October 2000 to May 2013 were included in this study; of these, 51% (n = 764) of the surgeries were performed in 134 patients receiving neuraxial anesthesia and 49% were performed in 143 patients receiving general anesthesia. Two hundred sixty-two patients received general and neuraxial anesthesia during different surgeries. We used the International Classification of Diseases, 9^th Revision codes and the medical records to identify patients who had an intraspinal abscess or meningitis develop after surgery for a PJI. Multivariate analysis was used to assess the effect of type of anesthesia (neuraxial versus general) on postoperative complications.ResultsThere were no cases of meningitis, but one epidural abscess developed in a patient after neuraxial anesthesia. This patient underwent six revision surgeries during a 42-day period. Patients who received neuraxial anesthesia had lower odds of systemic infections (4% versus 12%; odds ratio, 0.35; 95% CI, 023–054; p < 0.001).ConclusionsCentral nervous system infections after neuraxial anesthesia in patients with a PJI appear to be exceedingly rare. Based on the findings of this study, it may be time for the anesthesiology community to reevaluate the risk of sepsis as a relative contraindication to the use of neuraxial anesthesia.

Level of Evidence

Level III, therapeutic study.     

Does Regional Anesthesia Reduce Complications Following Total Hip and Knee Replacement Compared With General Anesthesia? An Analysis From the National Joint Registry for England,Wales, Northern Ireland and the Isle of Man

BackgroundRegional anesthesia is increasingly used in enhanced recovery programs following total hip replacement (THR) and total knee replacement (TKR). However, debate remains about its potential benefit over general anesthesia given that complications following surgery are rare. We assessed the risk of complications in THR and TKR patients receiving regional anesthesia compared with general anesthesia using the world’s largest joint replacement registry.MethodsWe studied the National Joint Registry for England, Wales, Northern Ireland and the Isle of Man linked to English hospital inpatient episodes for 779,491 patients undergoing THR and TKR. Patients received either regional anesthesia (n = 544,620, 70%) or general anesthesia (n = 234,871, 30%). Outcomes assessed at 90 days included length of stay, readmissions, and complications. Regression models were adjusted for patient and surgical factors to determine the effect of anesthesia on outcomes.ResultsLength of stay was reduced with regional anesthesia compared with general anesthesia (THR = −0.49 days, 95% confidence interval [CI] = −0.51 to −0.47 days, P < .001; TKR = −0.47 days, CI = −0.49 to −0.45 days, P < .001). Regional anesthesia also had a reduced risk of readmission (THR odds ratio [OR] = 0.93, CI = 0.90-0.96; TKA OR = 0.91, CI = 0.89-0.93), any complication (THR OR = 0.88, CI = 0.85-0.91; TKA OR = 0.90, CI = 0.87-0.93), urinary tract infection (THR OR = 0.85, CI = 0.77-0.94; TKR OR = 0.87, CI = 0.79-0.96), and surgical site infection (THR OR = 0.87, CI = 0.80-0.95; TKR OR = 0.84, CI = 0.78-0.89). Anesthesia type did not affect the risk of revision surgery or mortality.ConclusionRegional anesthesia was associated with reduced length of stay, readmissions, and complications following THR and TKR when compared with general anesthesia. We recommend regional anesthesia should be considered the reference standard for patients undergoing THR and TKR.     

Home therapy pathway – Safe and streamlined method of initial management of ankle fractures

BackgroundAnkle fractures requiring operative fixation often swell up after 24 h and surgery during this period is not feasible as there are several associated risks including infection and wound breakdown. The affected limb is kept elevated usually in hospital and once the swelling has sufficiently subsided then the operation takes place. We conducted a study looking at the impact of a home therapy ankle pathway on the length of stay and safety of patients with ankle fractures requiring surgical fixation.MethodsThe length of stay of a control group was studied from December 2009 to March 2010. The home therapy ankle pathway was then introduced in August 2010. If patients could not have their operation within 24 h then they were placed in a Plaster of Paris back slab in casualty with the ankle reduced, limb care advice given – elevation, cooling and DVT thromboprophylaxis – and the patient was discharged home on crutches after a slot was determined on the trauma list typically six days later. The patient was also given an emergency contact number in case an untoward event occurred, and they were called at least once during their home stay by hospital staff to ensure all was well. Patients who were unsafe to be discharged on home therapy were admitted. This cohort of patients was studied between August 2010 and December 2011ResultsIn the control group, 49 ankle fractures required operative intervention. The mean pre-operative length of stay was 2.88 days and the mean post op length of stay was 5 days. Between August 2010 and December 2011, after implementation of the pathway, 176 ankle fractures requiring operative treatment presented to the orthopaedic department. Of these, 105 were eligible for home therapy on the ankle pathway prior to surgery. The average pre-operative length of stay on the pathway was 0.17 days. The average post op length of stay was 1.72 days (P < 0.001 in all modalities). Home therapy was carried out for an average of 6.63 days. Challenges of home therapy included persistent swelling and blistering (11), loss of reduction (4), poor pain management whilst at home (4) and cancellation due to lack of availability of a theatre slot (6).ConclusionWith patients in whom it is indicated, the home therapy ankle pathway has proved to be a safe and resource sparing method of managing ankle fractures prior to surgery.