A randomized control trial for evaluation of transfusion related immuno-modulation in patients with meningioma.

BACKGROUND: Blood transfusion necessity in neurosurgery varies based on surgical type, blood loss, and patient anemia. Leukocytes in red blood cells (RBCs) component release pro-inflammatory cytokines during storage, contributing to transfusion-related immunomodulation (TRIM). Our aim was to examine the impact of the leukocyte content in transfused PRBCs on patients undergoing neurosurgery for meningioma tumours. STUDY DESIGN AND METHODS: This prospective randomized controlled trial conducted from 2018 to 2020 by dividing patients randomly into non-leukoreduced (NLR) (n = 65) and leuko-reduced (LR) (n = 65) groups based on PRBCs received during surgery and hospital stay. Hospital and ICU stays, mechanical ventilation duration, and postoperative bacterial infections were observed. Hematological parameters and cytokine levels (IL-10, INF-gamma, and FAS-L) were assessed at pre-transfusion, 24 h, and 7 days post-transfusion. Data analysis included Mann-Whitney U test, Friedman test, Fisher's chi-square test, with statistical significance at p < 0.05. RESULTS: In our study, ICU and hospital stay duration showed no significant difference (p = 0.06) between groups. However, NLR group had longer mean mechanical ventilation (18 ± 40.1 h) than the LR group (12.8 ± 8.6 h). Both groups showed statistically significant increase in Fas-L level on days 1 and 7 (p < 0.05). The IL-10 levels rose 43% in the NLR group, while and decreased by 7% the LR group on day 1. On day 7, IL-10 increased by 75% in NLR and decreased by 40% in LR, with no significance (p > 0.05). CONCLUSION: In conclusion, leukoreduction appeared to offer some immune response protection in term of reducing mechanical ventilation timings and cytokine level changes.

Brain Regional Energy Metabolism in Patients with Traumatic Brain Injury: A Cerebral Microdialysis Guided Study.

BACKGROUND: In traumatic brain injuries (TBI), cerebral microdialysis (CMD)-derived parameters, especially the lactate to pyruvate ratio (LP ratio), have been utilized for cerebral perfusion optimization. The objectives were to identify cerebral ischemia as measured by CMD in TBI patients requiring decompressive craniectomy and to observe the correlation between cerebral perfusion pressure (CPP), intracranial pressure (ICP), and CMD variables in these patients. Our secondary aim was to observe the effect of CPP augmentation on ischemia biomarkers. METHODS: After the Institute Ethics Committee approvals, seven adult patients requiring decompressive craniectomy following TBI were enrolled and CMD data were obtained prospectively for 72 h. CPP was augmented by 20% with noradrenaline infusion if LP ratio >40. Correlations were done with bootstrapping (n = 500) to obtain the confidence intervals (CI) due to the small sample size. RESULTS: One patient had cerebral ischemia (median LP ratio of 265.5 and median pyruvate of 38 µmol/L), while another patient had non-ischemic mitochondrial dysfunction (median LP ratio 40.7 and median pyruvate 278.5). The coefficients of correlation between the LP ratio with CPP and ICP were r = -0.05 (CI = -0.14-0.03) and r = 0.09 (CI = -0.03-0.24), respectively. The coefficient of correlation between cerebral and blood glucose was r = 0.38, (CI - 0.35-0.14). Only two patients needed CPP augmentation, however, postaugmentation cerebral biochemistry did not change appreciably. CONCLUSION: CMD can identify cerebral ischemia, however, no correlations were observed between the LP ratio and CPP or ICP. CPP augmentation did not improve cerebral biochemistry. More studies are required to understand and treat cerebral metabolism in TBI.

Anesthesia for same day neurosurgery with updates on awake craniotomy and awake spine surgery.

PURPOSE OF REVIEW: This article delves into recent advances in same-day neurosurgery (SDNS), specifically concerning indications, perioperative protocol, safety, and outcomes. Additionally, it explores the recent updates on awake craniotomy and awake spine surgery. RECENT FINDINGS: There is an evolving body of literature on studies about SDNS that reaffirm its safety and feasibility. awake craniotomy is associated with lesser neurological deficits and better survival benefits in patients with lesions in eloquent areas. Monitored anesthesia care, compared with the asleep-awake-asleep technique, is associated with lower failure rates, shorter procedure time, and shorter length of stay. However, the incidence of intraoperative seizures is lower with the asleep-awake-asleep technique. Propofol-based and dexmedetomidine-based anesthesia are similar with regard to procedure duration, intraoperative adverse events, and patient satisfaction; however, surgeon satisfaction is higher with dexmedetomidine-based anesthesia. In spine surgery, regional anesthesia when compared with general anesthesia, is associated with less intraoperative blood loss and a lower incidence of postoperative nausea and vomiting after 24 h. In addition, implementing an enhanced multimodal analgesia protocol improved disability scores and reduced the likelihood of postoperative complications. SUMMARY: SDNS offers promising prospects for patients and healthcare providers alike, with the potential to provide well tolerated, efficient, and cost-effective neurosurgical care in carefully selected cases.

Differences in Perioperative Management of Patients Undergoing Complex Spine Surgery: A Global Perspective.

BACKGROUND: The aim of this survey was to understand institutional spine surgery practices and their concordance with published best practices/recommendations. METHODS: Using a global internet-based survey examining perioperative spine surgery practice, reported institutional spine pathway elements (n=139) were compared with the level of evidence published in guideline recommendations. The concordance of clinical practice with guidelines was categorized as poor (≤20%), fair (21%-40%), moderate (41%-60%), good (61%-80%), or very good (81%-100%). RESULTS: Seventy-two of 409 (17.6%) institutional contacts started the survey, of which 31 (7.6%) completed the survey. Six (19.4%) of the completed surveys were from respondents in low/middle-income countries, and 25 (80.6%) were from respondents in high-income countries. Forty-one incomplete surveys were not included in the final analysis, as most were less than 40% complete. Five of 139 (3.6%) reported elements had very good concordance for the entire cohort; hospitals with spine surgery pathways reported 18 elements with very good concordance, whereas institutions without spine surgery pathways reported only 1 element with very good concordance. Reported spine pathways included between 7 and 47 separate pathway elements. There were 87 unique elements in the reviewed pathways. Only 3 of 87 (3.4%) elements with high-quality evidence demonstrated very good practice concordance. CONCLUSIONS: This global survey-based study identified practice variation and low adoption rates of high-quality evidence in the care of patients undergoing complex spine surgery.

Local Ulceration following Peripheral Neurolysis with Absolute Alcohol in Patients with Drug-Refractory Trigeminal Neuralgia: A Series of Four Cases.

A significant number of patients with trigeminal neuralgia (TGN) are refractory to first-line drugs and require interruption of the pain pathway by various percutaneous procedures. One such percutaneous technique involves an injection of absolute alcohol (AA) into the peripheral branches of the trigeminal nerve. This procedure is useful in elderly and medically compromised drug-refractory cases of TGN who are not interested in undergoing open neurosurgery. Peripheral neurolysis with AA is easy, quick, and safe. It may be carried out in the outpatient department; however, its use is not free from complications. Here, we report four such patients who were complicated with local necrosis and ulceration following administration of AA. The most probable attributable etiologies are sympathetic nerve involvement, intravascular injection of alcohol, vascular spasm of the terminal arteries, distal micro-emboli effect, and faulty technique, including repeated injections.

Perioperative Management of Pediatric Brain Tumors: A Retrospective Analysis.

Background: Brain tumors are the second most common malignancy in childhood and the surgical excision remains the cornerstone of management. The objective of this study was to analyze the factors associated with the length of intensive care unit (ICU) and hospital stay, and postoperative outcome in such children. Materials and Methods: Three years of data were collected, retrospectively, by detailed review of medical records pertaining to pre-anesthetic evaluation and perioperative course of children less than 16 years of age who underwent excision of intracranial tumors. Results: One hundred sixty-eight medical records were analyzed. One third of the children were found to have developed various intraoperative adverse events; the most common were hemodynamic changes following brainstem handling and brain swelling. 58% of children required postoperative mechanical ventilation. 82.7% of patients had favorable neurologic outcome which was comparable between the two tumor locations (supratentorial vs infratentorial). On multivariate analysis, re-exploration surgery and electrolyte disturbances, such as serum sodium, were found to be the independent risk factors affecting hospital stay. The amount of intraoperative blood loss and postoperative pulmonary complications (POPCs) were independent risk factors affecting the neurologic outcome. Conclusions: Adverse events are fairly common after excision of brain tumors in children. Intraoperative complications did not affect the ICU stay or neurological outcome; however, the postoperative complications increased length of ICU and hospital stays. POPC was the single most important factor responsible for poor neurologic outcome and was more so in children who underwent infratentorial surgery, prolonged mechanical ventilation, and who had a lower cranial nerve palsy.

A Rare Case of Postoperative Extradural Hematoma in the Posterior Fossa Complicated by Both Stunned Myocardium and Neurogenic Pulmonary Edema.

Acute neurological insult can trigger a cascade of events in other organ systems such as the heart and lung. Neurogenic stunned myocardium (NSM) and Neurogenic pulmonary edema (NPE) are mostly reported after stroke, subarachnoid hemorrhage, or seizures whenever sympathetic storm and autonomic dysregulation occurs. We report here for the first time, a case of postoperative infratentorial extradural hematoma in a patient triggering NSM and NPE at the same time. The challenges involved in the management of such a patient are described in this case report. The patient was successfully managed and discharged home with no new neurological deficits.

A Century With Craniopagus Twin Separation Surgeries: Nihilism to Optimism.

Craniopagus conjoined twins are extremely rare, reported 1 in 2.5 million live births. To date, 62 separation attempts in 69 well-documented cases of craniopagus twins have been made. Of these, 34 were performed in a single-stage approach, and 28 were attempted in a multistage approach. One or both twins died of massive intraoperative blood loss and cardiac arrest in 14 cases. We report our surgical experience with conjoined craniopagus twins (JB) with type III total vertical joining and shared circumferential/circular sinus with left-sided dominance. A brief review of the literature is also provided. In our twins, the meticulous preoperative study and planning by the multidisciplinary team consisting of 125-member, first-staged surgical separation consisted of creation of venous conduit to bypass part of shared circumferential sinus and partial hemispheric disconnection. Six weeks later, twin J manifested acute cardiac overload because of one-way fistula development from blocked venous bypass graft necessitating emergency final separation surgery. Unique perioperative issues were abnormal anatomy, hemodynamic sequelae from one-way fistula development after venous bypass graft thrombosis, cardiac arrest after massive venous air embolism requiring prolonged cardiopulmonary resuscitation, and return of spontaneous circulation at 15 minutes immediately after separation. This is the first Indian craniopagus separation surgery in a complex total vertical craniopagus twin reported by a single-center multidisciplinary team. Both twins could be sent home, but one remained severely handicapped. Adequate perioperative planning and multidisciplinary team approach are vital in craniopagus twin separation surgeries.

Effect of Goal-Directed Intraoperative Fluid Therapy on Duration of Hospital Stay and Postoperative Complications in Patients Undergoing Excision of Large Supratentorial Tumors.

Background: Optimal fluid management during neurosurgery is controversial. Evidences suggest that goal-directed fluid therapy (GDFT) can improve postoperative outcome. This study aimed to assess the intraoperative use of GDFT on the duration of hospital stay and postoperative complications in patients undergoing craniotomy for large supratentorial tumors. Materials and Methods: Forty patients of 18-65 years age undergoing large supratentorial tumor surgery were prospectively randomized into two groups. Control-group received fluid regimen based on routine hemodynamic monitoring, whereas patients belonging to GDFT group received fluid based on stroke volume variation (SVV)-guided therapy. A colloid bolus of 250 ml 6% hydroxyl ethyl starch was given, if the SVV was more than 12% in the GDFT group. Hemodynamic parameters, such as blood pressure and heart rate, and dynamic parameters, such as cardiac index, stroke volume index, and SVV, were recorded at different time intervals. Results: The total amount of fluid required was significantly lower in GDFT (P = 0.003) group as compared to the Control group. Intraoperative complications were significantly lower in GDFT group (P = 0.005), but the incidence of tight brain was significantly higher in the control group. The duration of hospital stay (P = 0.07) and incidence of postoperative complications (P = 0.32) were lower in GDFT group. Neurological outcomes at-discharge were similar in both the groups. Conclusions: This study did not show any benefit of GDFT over conventional intraoperative fluid therapy in terms of incidence of postoperative complications, hospital and ICU stay, and Glasgow outcome scores at-discharge in patients undergoing craniotomy for excision of large supratentorial tumors. However, the use of GDFT leads to better perioperative fluid management and brain relaxation scores. Clinical Trial Registry: CTRI/2016/10/007350.

Human errors and their prevention in healthcare.

Human errors form a significant portion of preventable mishaps in healthcare. Even the most competent clinicians are not immune to it. Errors in the perioperative period can often have grave consequences, and hence, perioperative clinicians need to be aware of the impact of human errors and how to minimize them. Errors are broadly classified into two kinds: latent and active errors. While active errors need to be addressed at the individual level, latent errors indicate organizational inadequacies. This review describes common errors in perioperative settings, the impact of such errors on healthcare, and preventive strategies to minimize such errors in daily patient care.

Brain Death Diagnosis for Potential Organ Donors During the Covid-19 Pandemic.

Formal brainstem reflex testing remains one of the most important procedures in identification and evaluation of patients who meet clinical criteria for brainstem death. Early identification of such patients is critical since willing donors may contribute to the organ donation process. During the first two waves of the coronavirus disease of 2019 (COVID-19) pandemic, organ transplantation from brainstem dead donors has declined significantly due to several reasons, including perceived increased risk of virus transmission to both physicians as well as patients as well as lack of awareness regarding donor workup in the context of the COVID-19 pandemic.

Predictive value of intraoperative D-wave and m-MEP neurophysiological monitoring in patients with preoperative motor deficits in immediate and late postoperative period.

BACKGROUND: Presence of preoperative motor deficits in patients poses a distinct challenge in monitoring the integrity of corticospinal tracts during spinal surgeries. The inconsistency of the motor-evoked potentials is such patients, limits its clinical utility. D-wave is a robust but less utilized technique for corticospinal tract monitoring. The comparative clinical value of these two techniques has not been evaluated in the patients with preoperative deficits. OBJECTIVES: The objective of the study was to compare the predictive utility of myogenic Motor Evoked Potentials (m-MEP) and D-wave in terms of recordability and their sensitivity and specificity in predicting transient and permanent new motor deficits. MATERIALS AND METHODS: Thirty-one patients with preoperative motor deficit scheduled to undergo spinal surgery were included in the study. Intraoperative m-MEP and D-wave changes were identified and correlated with postoperative neurology in the immediate postoperative period and at the time of discharge. RESULTS: The mean preoperative motor power of the patient pool in left and right lower limb was 2.97 ± 1.56 and 3.32 ± 1.49, respectively. The recordability of m-MEPs and D-wave was observed to be 79.4% and 100%, respectively. The m-MEP predicted the motor deterioration in immediate postoperative period with 100% sensitivity and 80% specificity, while D-wave had 14% sensitivity and 100% specificity. At the time of discharge, m-MEPs' specificity reduced to 61%, while D-wave demonstrated 100% specificity. CONCLUSIONS: D-wave has a better recordability than m-MEPs in neurologically compromised patients. D-wave predicts development of long-term deficits with 100% specificity, while m-MEPs have a high sensitivity for transient neurological deficit. A combination of D-wave and m-MEP is recommended for monitoring the integrity of the corticospinal tract in patients with preoperative motor deficits.

Perioperative Management of a Child with Klippel-Feil Syndrome and Severe Uncorrected Aortic Stenosis Undergoing Cervical Spine Stabilization.

Severe stenotic aortic valve poses serious anesthetic challenges because of the fixed cardiac output and complex hemodynamics. The challenges magnify in the presence of a difficult airway which not only puts the airway at risk but also disturbs the hemodynamics, which can negatively impact the patient outcome. Moreover, prone positioning, intraoperative hemodynamics, recovery, and extubation are equally challenging for management. This case report highlights the perioperative management of a child with severe uncorrected aortic stenosis and Klippel-Feil syndrome posted for cervical spinal stabilization under anesthesia.

Conditioning Effect of Inhalational Anesthetics on Delayed Cerebral Ischemia After Aneurysmal Subarachnoid Hemorrhage.

BACKGROUND: Delayed cerebral ischemia (DCI) after aneurysmal subarachnoid hemorrhage (SAH) has been identified as an independent predictor of poor outcome in numerous studies. OBJECTIVE: To investigate the potential protective role of inhalational anesthetics against angiographic vasospasm, DCI, and neurologic outcome in SAH patients. METHODS: After Institutional Review Board approval, data were collected retrospectively for SAH patients who received general anesthesia for aneurysm repair between January 1st, 2010 and May 31st, 2018. Primary outcomes were angiographic vasospasm, DCI, and neurologic outcome as measured by modified Rankin scale at hospital discharge. Univariate and logistic regression analysis were performed to identify independent predictors of these outcomes. RESULTS: The cohort included 390 SAH patients with an average age of 56 ± 15 (mean ± SD). Multivariate logistic regression analysis identified inhalational anesthetic only technique, Hunt-Hess grade, age, anterior circulation aneurysm and average intraoperative mean blood pressure as independent predictors of angiographic vasospasm. Inhalational anesthetic only technique and modified Fishers grade were identified as independent predictors of DCI. No impact on neurological outcome at time of discharge was noted. CONCLUSION: Our data provide additional evidence that inhalational anesthetic conditioning in SAH patients affords protection against angiographic vasospasm and new evidence that it exerts a protective effect against DCI. When coupled with similar results from preclinical studies, our data suggest further investigation into the impact of inhalational anesthetic conditioning on SAH patients, including elucidating the most effective dosing regimen, defining the therapeutic window, determining whether a similar protective effect against early brain injury, and on long-term neurological outcome exists.

The Impact of the Global SARS-CoV-2 (COVID-19) Pandemic on Neuroanesthesiology Fellowship Programs Worldwide and the Potential Future Role for ICPNT Accreditation.

BACKGROUND: The COVID-19 pandemic is an international crisis placing tremendous strain on medical systems around the world. Like other specialties, neuroanesthesiology has been adversely affected and training programs have had to quickly adapt to the constantly changing environment. METHODS: An email-based survey was used to evaluate the effects of the pandemic on clinical workflow, clinical training, education, and trainee well-being. The impact of the International Council on Perioperative Neuroscience Training (ICPNT) accreditation was also assessed. RESULTS: Responses were received from 14 program directors (88% response rate) in 10 countries and from 36 fellows in these programs. Clinical training was adversely affected because of the cancellation of elective neurosurgery and other changes in case workflow, the introduction of modified airway and other protocols, and redeployment of trainees to other sites. To address educational demands, most programs utilized online platforms to organize clinical discussions, journal clubs, and provide safety training modules. Several initiatives were introduced to support trainee well-being during the pandemic. Feelings of isolation and despair among trainees varied from 2 to 8 (on a scale of 1 to 10). Fellows all reported concerns that their clinical training had been adversely affected by the coronavirus disease 2019 (COVID-19) pandemic because of decreased exposure to elective subspecialty cases and limited opportunities to complete workplace-based assessments and training portfolio requirements. Cancellation of examination preparation courses and delayed examinations were cited as common sources of stress. Programs accredited by the ICPNT reported that international networking and collaboration was beneficial to reduce feelings of isolation during the pandemic. CONCLUSION: Neuroanesthesia fellowship training program directors introduced innovative ways to maintain clinical training, educational activity and trainee well-being during the COVID-19 pandemic.