Journal of neurosurgical anesthesiology最新文献

Background: Physicians and patients are eager to know likely functional outcomes at different stages of treatment after acute ischemic stroke (AIS). The aim of this study was to develop and validate a 2-step model to assess prognosis at different time points (pre- and posttreatment) in patients with AIS having endovascular thrombectomy (EVT).

Methods: The prediction model was developed using a prospective nationwide Chinese registry (ANGEL-ACT). A total of 1676 patients with AIS who underwent EVT were enrolled into the study and randomly divided into development (n=1351, 80%) and validation (n=325, 20%) cohorts. Multivariate logistic regression, least absolute shrinkage and selection operator regression, and the random forest recursive feature elimination algorithm were used to select predictors of 90-day functional independence. We constructed the model via discrimination, calibration, decision curve analysis, and feature importance.

Results: The incidence of 90-day functional independence was 46.3% and 40.6% in the development and validation cohorts, respectively. The area under the curve (AUC) for model 1 which included 5 pretreatment predictors (age, admission National Institutes for Health Stroke Scale score, admission glucose level, admission systolic blood pressure, and Alberta Stroke Program Early Computed Tomography score) was 0.699 (95% confidence interval [CI], 0.668-0.730) in the development cohort and 0.658 (95% CI, 0.592-0.723) in the validation cohort. Two treatment-related predictors (time from stroke onset to puncture and successful reperfusion) were added to model 2 which had an AUC of 0.719 (95% CI, 0.688-0.749) and 0.650 (95% CI, 0.585-0.716) in the development cohort and validation cohorts, respectively.

Conclusions: The 2-step prediction model could be useful for predicting the functional independence in patients with AIS 90-days after EVT.

Background: This study aimed to compare analgesic practices for patients undergoing craniotomy in high-income countries (HICs) and low-income and middle-income countries (LMICs), focusing on variations in medication use and techniques.

Methods: An English-language and Spanish-language electronic survey was sent to over 300 anesthesiologists in 35 countries from March 22 to May 19, 2024, to gather data on analgesia for craniotomy patients. Anonymous responses through REDCap were analyzed as a whole and by income category (HICs and LMICs).

Results: We received 328 responses (105 HICs, 221 LMICs, and 2 missing locations). Acetaminophen was used by 78% of respondents (HIC: 82%, LMIC: 76%), with low nonavailability in both groups (0.95% HICs, 4.98% LMICs). Fentanyl boluses were used in 57% of cases (HIC: 60%, LMIC: 55%). Incisional local anesthesia was administered in 51% (HIC: 52%, LMIC: 50%), with minimal nonavailability (1.9% HIC, 1.4% LMIC). The use of a remifentanil infusion was more common in HICs (64%) than LMICs (31%), where nonavailability was significantly higher (43.89% vs. 7.62% HICs). Scalp blocks were used by 15% of HICs and 43% of LMICs. Craniotomy indication influenced the choice of analgesia for 61% of respondents.

Conclusions: Analgesic practices for craniotomy vary significantly between HICs and LMICs, primarily due to medication availability. Global guidelines should consider resource differences to improve postoperative pain management.

Background: In endovascular treatment (EVT) for ischemic stroke, conversion from non-general anesthesia (non-GA) to general anesthesia (GA) may be necessary. This study aims to evaluate the effects of intra-EVT emergency GA conversion on patient outcomes and to identify potential risk factors for such conversions.

Methods: A retrospective cohort study was conducted on ischemic stroke patients who underwent EVT without GA at a tertiary hospital in China. The primary outcome was the modified Rankin scale (mRS) score at 90 days. Secondary outcomes included procedural duration, rates of successful reperfusion, discharge status, and mRS scores at 1 and 3 months. Multivariable logistic regression, propensity score matching (PSM), and coarsened exact matching (CEM) were utilized to control for confounding factors.

Results: Among 418 screened patients, 215 met eligibility criteria (non-GA=172, GA conversion=43). The 3-month mRS scores were similar between GA and non-GA groups across all analyses. However, GA conversion significantly reduced the likelihood of achieving mRS scores of 0 to 3 at discharge (unmatched: OR=0.37; PSM: OR=0.29; CEM: OR=0.33) and at 90 days (unmatched: OR=0.41; PSM: OR=0.38; CEM: OR=0.36). CEM analysis indicated that GA conversion significantly increased the 1-month mortality (OR=2.76). High National Institutes of Health Stroke Scale (NIHSS) scores and the absence of atrial fibrillation emerged as independent predictors of GA conversion.

Conclusions: During EVT, the conversion from non-GA to GA is associated with significant hemodynamic fluctuations and may adversely affect both short-term and long-term neurological outcomes. The likelihood of GA conversion increases with higher NIHSS scores or in the absence of atrial fibrillation.

Background: Cerebral vasospasm after aneurysmal subarachnoid hemorrhage (ASAH) is a serious complication and has a strong relationship with systemic inflammatory responses. Given previously reported relationships between leukocytosis and anemia with ASAH-related cerebral vasospasm, this study examined the association between the preoperative white blood cell-to-hemoglobin ratio (WHR) and postoperative symptomatic cerebral vasospasm (SCV) in patients with ASAH.

Methods: Demographic, preoperative (comorbidities, ASAH characteristics, laboratory findings), intraoperative (operation and anesthesia), and postoperative (SCV, other neurological complications, clinical course) data were retrospectively analyzed in patients with ASAH who underwent surgical or endovascular treatment of the culprit aneurysm. Patients were divided into high-WHR (n=286) and low-WHR (n=257) groups based on the optimal cutoff value of preoperative WHR (0.74), and stabilized inverse probability weighting was performed between the 2 groups. The predictive power of the WHR and other preoperative systemic inflammatory indices (neutrophil-to-albumin, neutrophil-to-lymphocyte, platelet-to-lymphocyte, platelet-to-neutrophil, platelet-to-white blood cell ratios, and systemic immune-inflammation index) for postoperative SCV was evaluated.

Results: Postoperative SCV was more frequent in the high-WHR group than in the low-WHR group before (33.2% vs. 12.8%; P <0.001) and after (29.4% vs. 19.1%; P =0.005) inverse probability weighting. Before weighting, the predictive power for postoperative SCV was the highest for the WHR among the preoperative systematic inflammatory indices investigated (area under receiver operating characteristics curve 0.66, P <0.001). After weighting, preoperative WHR ≥0.74 was independently associated with postoperative SCV (odds ratio 1.76; P =0.006).

Conclusions: High preoperative WHR was an independent predictor of postoperative SCV in patients with ASAH.

Objective: This study explored the current global landscape of periprocedural care of acute ischemic stroke patients undergoing endovascular thrombectomy (EVT).

Methods: An anonymous, 54-question electronic survey was sent to 354 recipients in hospitals worldwide. The responses were stratified by World Bank country income level into high-income (HICs) and low/middle-income (LMICs) countries.

Results: A total of 354 survey invitations were issued. Two hundred twenty-three respondents started the survey, and 87 fully completed surveys were obtained from centers in which anesthesiologists were routinely involved in EVT care (38 in HICs; 49 in LMICs). Respondents from 35 (92.1%) HICs and 14 (28.6%) LMICs reported that their centers performed >50 EVTs annually. Respondents from both HICs and LMICs reported low rates of anesthesiologist involvement in pre-EVT care, though a communication system was in place in 100% of HIC centers and 85.7% of LMIC centers to inform anesthesiologists about potential EVTs. Respondents from 71.1% of HIC centers and 51% of LMIC centers reported following a published guideline during EVT management, though the use of cognitive aids was low in both (28.9% and 24.5% in HICs and LMICs, respectively). Variability in multiple areas of practice, including choice of anesthetic techniques, monitoring and management of physiological variables during EVT, and monitoring during intrahospital transport, were reported. Quality metrics were rarely tracked or reported to the anesthesiology teams.

Conclusions: This study demonstrated variability in anesthesiology involvement and in clinical care during and after EVT. Centers may consider routinely involving anesthesiologists in pre-EVT care, using evidence-based recommendations for EVT management, and tracking adherence to published guidelines and other quality metrics.

Background: The glymphatic system plays a crucial role in clearing metabolic waste from the central nervous system and is most active during sleep. Patients with obstructive sleep apnea (OSA) have a dysfunctional glymphatic system that correlates with disease severity. In addition, these patients have worse outcomes after surgery. The status of the glymphatic system during the perioperative period is unclear and can be examined with magnetic resonance imaging (MRI)-based diffusion tensor imaging (DTI). This study assessed perioperative glymphatic system changes in OSA surgical patients and possible relationships with perioperative neurocognitive disorders.

Methods: DTI data from 13 OSA patients having laparoscopic abdominal surgery with general anesthesia were acquired and analyzed using a 3.0-T MRI scanner. Diffusivity maps in the x -axis (D xx ), y -axis (D yy ), z -axis (D zz ), x - y axis (D xy ), y - z axis (D yz ), and x - z axis (D xz ) were calculated. Diffusion values for the projection and association fibers were extracted, and DTI analysis along the perivascular space (ALPS) was performed. The patients' cognition was assessed using the Montreal Cognitive Assessment tool. Evaluations were carried out within 5 days before surgery and within the first 48 hours after surgery.

Results: The ALPS index decreased after surgery, and this correlated with a decrease in general cognition scores and specific memory domains, including visuospatial and delayed recall.

Conclusions: The glymphatic system in OSA patients is worsened after surgery and this may contribute to an increased risk for long-term postoperative cognitive disorders. This study suggest that the glymphatic system might play a role in the pathophysiology of perioperative neurocognitive disorders and be a potential therapeutic target.

Background: Postoperative stroke is a potentially devastating neurological complication following surgical revascularization for Moyamoya disease. We sought to evaluate whether peri-operative hemoglobin levels were associated with the risk of early post-operative stroke following revascularization surgery in adult Moyamoya patients.

Methods: Adult patients having revascularization surgeries for Moyamoya disease between 1999-2022 were identified through single institutional retrospective review. Logistic regression analysis was used to test for the association between hemoglobin drop and early postoperative stroke.

Results: In all, 106 revascularization surgeries were included in the study. A stroke occurred within 7 days after surgery in 9.4% of cases. There were no significant associations between the occurrence of an early postoperative stroke and patient age, gender, or race. Mean postoperative hemoglobin drop was greater in patients who suffered an early postoperative stroke compared with patients who did not (2.3±1.1 g/dL vs. 1.3±1.1 g/dL, respectively; P =0.034). Patients who experienced a hemoglobin drop post-operatively had 2.03 times greater odds (95% confidence interval, 1.06-4.23; P =0.040) of having a stroke than those whose hemoglobin levels were stable. Early postoperative stroke was also associated with an increase in length of hospital stay ( P <0.001), discharge to a rehabilitation facility ( P =0.014), and worse modified Rankin scale at 1 month ( P =0.001).

Conclusion: This study found a significant association between hemoglobin drop and early postoperative stroke following revascularization surgery in adult patients with Moyamoya disease. Based on our findings, it may be prudent to avoid hemoglobin drops in Moyamoya patients undergoing surgical revascularization.