Impact of Reduced Preincision Antibiotic Infusion Time on Surgical Site Infection Rates: A Retrospective Cohort Study.

OBJECTIVE: Our objective was to determine the impact of total preincision infusion time on surgical site infections (SSIs) and establish an optimal time threshold for subsequent prospective study. BACKGROUND: SSIs remain a major cause of morbidity. Although regulated, the total time of infusion of preincision antibiotics varies widely. Impact of infusion time on SSI risk is poorly understood. METHODS: All consecutive patients (n = 46,791) undergoing inpatient surgical intervention were retrospectively enrolled (2014-2015) and monitored for 1 year. Primary outcomes: the presence of SSI infection as predicted by reduced preoperative antibiotic infusion time. SECONDARY OUTCOMES: preintervention compliance, the impact of a quality improvement algorithm to optimize infusion time compliance. Multivariate logistic regression of the retrospective cohort demonstrated predictors of infection. Receiver-operating characteristic analysis demonstrated the timing threshold predictive of infection. Cost impact of avoidable infections was analyzed. RESULTS: Only 36.1% of patients received preincision infusion of vancomycin in compliance with national and institutional standards (60-120 min). Cephalosporin infusion times were 53 times more likely to be compliant [odds ratio (OR) 53.33, P < 0.001]. Vancomycin infusion times that were not compliant with national standards (less than standard 60-120 min) did not predict infection. However, significantly noncompliant, reduced preincision infusion time, significantly predicted SSI (<24.6 min infusion, AUC = 0.762). Vancomycin infusion, initiated too close to surgical incision, predicted increased SSI (OR = 4.281, P < 0.001). Implementation of an algorithm to improve infusion time, but not powered to demonstrate infection /reduction, improved vancomycin infusion start time (257% improvement, P < 0.001) and eliminated high-risk infusions (sub-24.6 min). CONCLUSIONS: Initially, vancomycin infusion rarely met national guidelines; however, minimal compliance breach was not associated with SSI implications. The retrospective data here suggest a critical infusion time for infection reduction (24.6 min before incision). Prospective implementation of an algorithm led to 100% compliance. These data suggest that vancomycin administration timing should be studied prospectively.

Proximal junctional kyphosis following T10-pelvis fusion presenting with neurologic compromise: case presentations and review of the literature.

Purpose: Proximal Junctional Kyphosis (PJK) is a well-documented phenomenon following spinal instrumented fusion. Myelopathy associated with proximal junctional failure (PJF) is poorly described in the literature. Adjacent segment disease, fracture above the upper instrumented vertebrae and subluxation may all cause cord compression, ambulatory dysfunction, and/or lower extremity weakness in the postoperative period.Materials and methods: We review the literature on PJK and PJF, and discusses the postoperative management of three patients who experienced myelopathy associated with PJF following T9/10 to pelvis fusion at a single institution.Results and conclusions: PJF with myelopathy must be diagnosed and surgically corrected early on so as to minimize permanent neurologic injury. Patients requiring significant sagittal deformity correction are at greater risk for PJF, and may benefit from constructs terminating in the upper thoracic spine.

Volume-dependent effect of perihaematomal oedema on outcome for spontaneous intracerebral haemorrhages.

INTRODUCTION: It is still unknown whether subsequent perihaematomal oedema (PHE) formation further increases the odds of an unfavourable outcome. METHODS: Demographic, clinical, radiographic and outcome data were prospectively collected in a single large academic centre. A multiple logistic regression model was then developed to determine the effect of admission oedema volume on outcome. RESULTS: 133 patients were analysed in this study. While there was no significant association between relative PHE volume and discharge outcome (p=0.713), a strong relationship was observed between absolute PHE volume and discharge outcome (p=0.009). In a multivariate model incorporating known predictors of outcome, as well as other factors found to be significant in our univariate analysis, absolute PHE volume remained a significant predictor of poor outcome only in patients with intracerebral haemorrhage (ICH) volumes ≤30 cm(3) (OR 1.123, 95% CI 1.021 to 1.273, p=0.034). An increase in absolute PHE volume of 10 cm(3) in these patients was found to increase the odds of poor outcome on discharge by a factor of 3.19. CONCLUSIONS: Our findings suggest that the effect of absolute PHE volume on functional outcome following ICH is dependent on haematoma size, with only patients with smaller haemorrhages exhibiting poorer outcome with worse PHE. Further studies are needed to define the precise role of PHE in driving outcome following ICH.

von Willebrand factor genetic variant associated with hematoma expansion after intracerebral hemorrhage.

BACKGROUND: Hematoma expansion, the leading cause of neurologic deterioration after intracerebral hemorrhage (ICH), remains one of the few modifiable risk factors for poor outcome. In the present study, we explored whether common genetic variants within the hemostasis pathway were related to hematoma expansion during the acute period after ICH. METHODS: Patients with spontaneous ICH who were admitted to the institutional Neuro-ICU between 2009 and 2011 were enrolled in the study, and clinical data were collected prospectively. Hematoma size was measured in patients admitted on or before postbleed day 2. Baseline models for hematoma growth were constructed using backwards stepwise logistic regression. Genotyping of single-nucleotide polymorphisms for 13 genes involved in hemostasis was performed, and the results were individually included in the above baseline models to test for independent association of hematoma expansion. RESULTS: During the study period, 82 patients were enrolled in the study and had complete data. The mean age was 65.9 ± 14.9 years, and 38% were female. Only von Willebrand factor was associated with absolute and relative hematoma growth in univariate analysis (P < .001 and P = .007, respectively); von Willebrand factor genotype was independently predictive of relative hematoma growth but only approached significance for absolute hematoma growth (P = .002 and P = .097, respectively). CONCLUSIONS: Our genomic analysis of various hemostatic factors identified von Willebrand factor as a potential predictor of hematoma expansion in patients with ICH. The identification of von Willebrand factor single-nucleotide polymorphisms may allow us to better identify patients who are at risk for hematoma enlargement and will benefit the most from treatment. The relationship of von Willebrand factor with regard to hematoma enlargement in a larger population warrants further study.

Glioblastoma biomarkers from bench to bedside: advances and challenges.

Glioblastoma multiforme (GBM) is the most common and aggressive primary brain tumour, with few available therapies providing significant improvements in mortality. Biomarkers, which are defined by the National Institutes of Health as 'characteristics that are objectively measured and evaluated as indicators of normal biologic processes, pathogenic processes, or pharmacologic responses to a therapeutic intervention', have the potential to play valuable roles in the diagnosis and treatment of GBM. Although GBM biomarker research is still in its early stages because of the tumour's complex pathophysiology, a number of potential markers have been identified which can be measured in either brain tissue or blood serum. In conjunction with other clinical data, particularly neuroimaging modalities such as MRI, these proteins could contribute to the clinical management of GBM by helping to classify tumours, predict prognosis and assess treatment response. In this article, we review the current understanding of GBM pathophysiology and recent advances in GBM biomarker research, and discuss the potential clinical implications of promising biomarkers. A better understanding of GBM pathophysiology will allow researchers and clinicians to identify optimal biomarkers and methods of interpretation, leading to advances in tumour classification, prognosis prediction and treatment assessment.

Severity of intraventricular extension correlates with level of admission glucose after intracerebral hemorrhage.

BACKGROUND AND PURPOSE: Hyperglycemia after spontaneous intracerebral hemorrhage (ICH) is associated with poor outcome, but the pathophysiology of ICH-induced glucose dysregulation remains unclear. We sought to identify clinical and radiographic parameters of ICH that are associated with admission hyperglycemia. METHODS: Patients admitted to the Columbia University Medical Center Neurological Intensive Care Unit with spontaneous ICH between January 2009 and September 2010 were prospectively enrolled in the ICH Outcomes Project. Clinical, radiographic, and laboratory data were collected prospectively. Receiver operating characteristic analysis was used to identify the glucose level with optimal sensitivity and specificity for in-hospital mortality. Logistic and linear regression analyses were used to identify independent predictors of outcome measures where appropriate. RESULTS: One hundred four patients admitted during the study period were included in the analysis. Mean admission glucose level was 8.23 ± 3.15 mmol/L (3.83 to 18.89 mmol/L) and 23.2% had a history of diabetes mellitus. Admission glucose was significantly associated with discharge (P=0.003) and 3-month mortality (P=0.002). Critical hyperglycemia defined at 10 mmol/L independently predicted discharge mortality (P=0.027; OR, 4.381; 95% CI, 1.186 to 16.174) and 3-month mortality (P=0.011; OR, 10.95; 95% CI, 1.886 to 62.41). Admission intraventricular extension score (P=0.038; OR, 1.117; 95% CI, 1.043 to 1.197) and diabetes mellitus (P=0.002; OR, 5.530; 95% CI, 1.833 to 16.689) were independent predictors of critical hyperglycemia. The intraventricular extension score (B=0.115, P=0.001) linearly correlated with admission glucose level (R=0.612, P=0.001) after adjusting for other clinical variables. CONCLUSIONS: Admission hyperglycemia after spontaneous ICH is associated with poor outcome and potentially related to the presence and severity of intraventricular extension.

Improving patient selection for endovascular treatment of acute cerebral ischemia: a review of the literature and an external validation of the Houston IAT and THRIVE predictive scoring systems.

Outcome after intraarterial therapy (IAT) for acute ischemic stroke remains variable, suggesting that improved patient selection is needed to better identify patients likely to benefit from treatment. The authors evaluate the predictive accuracies of the Houston IAT (HIAT) and the Totaled Health Risks in Vascular Events (THRIVE) scores in an independent cohort and review the existing literature detailing additional predictive factors to be used in patient selection for IAT. They reviewed their center's endovascular records from January 2004 to July 2010 and identified patients who had acute ischemic stroke and underwent IAT. They calculated individual HIAT and THRIVE scores using patient age, admission National Institutes of Health Stroke Scale (NIHSS) score, admission glucose level, and medical history. The scores' predictive accuracies for good outcome (discharge modified Rankin Scale score ≤ 3) were analyzed using receiver operating characteristics analysis. The THRIVE score predicts poor outcome after IAT with reasonable accuracy and may perform better than the HIAT score. Nevertheless, both measures may have significant clinical utility; further validation in larger cohorts that accounts for differences in patient demographic characteristics, variation in time-to-treatment, and center preferences with respect to IAT modalities is needed. Additional patient predictive factors have been reported but not yet incorporated into predictive scales; the authors suggest the need for additional data analysis to determine the independent predictive value of patient admission NIHSS score, age, admission hyperglycemia, patient comorbidities, thrombus burden, collateral flow, time to treatment, and baseline neuroimaging findings.

Traumatic brain injury in pediatric patients: evidence for the effectiveness of decompressive surgery.

Traumatic brain injury (TBI) is the current leading cause of death in children over 1 year of age. Adequate management and care of pediatric patients is critical to ensure the best functional outcome in this population. In their controversial trial, Cooper et al. concluded that decompressive craniectomy following TBI did not improve clinical outcome of the analyzed adult population. While the study did not target pediatric populations, the results do raise important and timely clinical questions regarding the effectiveness of decompressive surgery in pediatric patients. There is still a paucity of evidence regarding the effectiveness of this therapy in a pediatric population, and there is an especially noticeable knowledge gap surrounding age-stratified interventions in pediatric trauma. The purposes of this review are to first explore the anatomical variations between pediatric and adult populations in the setting of TBI. Second, the authors assess how these differences between adult and pediatric populations could translate into differences in the impact of decompressive surgery following TBI.

A comparative evaluation of existing grading scales in intracerebral hemorrhage.

BACKGROUND: In recent years, a multitude of clinical grading scales have been created to help identify patients at greater risk of poor outcome following ICH. We sought to validate and compare eight of the most frequently used ICH grading scales in a prospective cohort. METHODS: Eight grading scales were calculated for 67 patients with non-traumatic ICH enrolled in the prospective intracerebral hemorrhage outcomes project (ICHOP) database. Receiver operating characteristic (ROC) analysis, including area under the curve (AUC) and maximum Youden Index were used to assess the ability of each score to predict in-hospital mortality, long-term (3 months) mortality, and functional outcome at 3 months (mRS ≥ 3). RESULTS: All scales demonstrated excellent to outstanding discrimination for in-hospital and long-term mortality, with no significant differences between them after controlling for the false discovery rate. All scales demonstrated acceptable to outstanding discrimination for functional outcome at 3 months, with the new ICH score demonstrating significantly lower AUC than 6 of the 8 scores. Essen ICH score was the only score to demonstrate outstanding discrimination for each outcome measure. CONCLUSION: Though significant differences were minimal in our cohort, we showed the existing selection of ICH grading scales to be useful in stratifying patients according to risk of mortality and poor functional outcome. Continued validation and comparison in large prospective cohorts will bring the goal of a singular prognostic model for ICH closer to fruition.

Metabolomics-driven quantitative analysis of ammonia assimilation in E. coli.

Despite extensive study of individual enzymes and their organization into pathways, the means by which enzyme networks control metabolite concentrations and fluxes in cells remains incompletely understood. Here, we examine the integrated regulation of central nitrogen metabolism in Escherichia coli through metabolomics and ordinary-differential-equation-based modeling. Metabolome changes triggered by modulating extracellular ammonium centered around two key intermediates in nitrogen assimilation, alpha-ketoglutarate and glutamine. Many other compounds retained concentration homeostasis, indicating isolation of concentration changes within a subset of the metabolome closely linked to the nutrient perturbation. In contrast to the view that saturated enzymes are insensitive to substrate concentration, competition for the active sites of saturated enzymes was found to be a key determinant of enzyme fluxes. Combined with covalent modification reactions controlling glutamine synthetase activity, such active-site competition was sufficient to explain and predict the complex dynamic response patterns of central nitrogen metabolites.

The sociopolitical history and physiological underpinnings of skull deformation.

In this report, the evidence, mechanisms, and rationale for the practice of artificial cranial deformation (ACD) in ancient Peru and during Akhenaten's reign in the 18th dynasty in Egypt (1375-1358 BCE) are reviewed. The authors argue that insufficient attention has been given to the sociopolitical implications of the practice in both regions. While evidence from ancient Peru is widespread and complex, there are comparatively fewer examples of deformed crania from the period of Akhenaten's rule. Nevertheless, Akhenaten's own deformity, the skull of the so-called "Younger Lady" mummy, and Tutankhamen's skull all evince some degree of plagiocephaly, suggesting the need for further research using evidence from depictions of the royal family in reliefs and busts. Following the anthropological review, a neurosurgical focus is directed to instances of plagiocephaly in modern medicine, with special attention to the conditions' etiology, consequences, and treatment. Novel clinical studies on varying modes of treatment will also be studied, together forming a comprehensive review of ACD, both in the past and present.

Vomiting of unclear etiology in an autistic child-multiple possible diagnoses: A case report.

Appendicitis is a common complaint in the emergency department (ED) presenting with abdominal pain or vomiting and is often the foremost etiology the provider must rule out using history and physical examination. However, history and physical examination is limited in children and the developmentally delayed who are often non-cooperative. Less commonly, choledochal cysts are found that also require management, or rarer still, multiple possible radiologic or surgical diagnoses. This case report follows a delayed child presenting with vomiting found to have a large type 1 choledochal cyst, cholecystitis, and appendicitis on advanced imaging prompting surgical management of these etiologies. This report reviews the evaluation of children with vomiting and the need for thorough evaluation with advanced imaging when appropriate.

Evaluation of Lumbar Spine Bracing as a Postoperative Adjunct to Single-level Posterior Lumbar Spine Surgery.

BACKGROUND: Clinical practice in postoperative bracing after posterior single-level lumbar spine fusion (PLF) is inconsistent between providers. This study seeks to assess the effect of bracing on short-term outcomes related to safety, quality of care, and direct costs. METHODS: Retrospective cohort analyses of consecutive patients undergoing single-level PLF with or without bracing at a three-hospital urban academic medical center (2013-2017) were undertaken (n = 906). Patient demographics and comorbidities were analyzed. Test of independence, Mann-Whitney-Wilcoxon test, and logistic regression were used to assess differences in length of stay (LOS), discharge disposition/need for postacute care, quality-adjusted life year (QALY), surgical site infection (SSI), hospital cost, total cost, readmission within 30 days, and emergency room (ER) visits within 30 days. RESULTS: Among the study population, 863 patients were braced and 43 were not braced. No difference was seen between the two groups in short-term outcomes from surgery including LOS (P = 0.836), discharge disposition (P = 0.226), readmission (P = 1.000), ER visits (P = 0.281), SSI (P = 1.000), and QALY gain (P = 0.319). However, the braced group incurred a significantly higher direct hospital cost (median increase of 41.43%, P < 0.001) compared to the unbraced cohort (bracing cost excluded). There was no difference in graft type (P = 0.145) or comorbidities (P = 0.20-1.00) such as obesity (P = 1.000), smoking (P = 1.000), chronic obstructive pulmonary disease (P = 1.000), hypertension (P = 0.805), coronary artery disease (P = 1.000), congestive heart failure (P = 1.000), and total number of comorbidities (P = 0.228). CONCLUSION: Short-term data suggest that removal of bracing from the postoperative regimen for PLF will not result in increased adverse outcomes but will reduce cost.

Surgical Outcomes in Post-Traumatic Epilepsy: A Single Institutional Experience.

BACKGROUND: Post-traumatic epilepsy (PTE) is a debilitating sequela of traumatic brain injury (TBI), occurring in up to 20% of severe cases. This entity is generally thought to be more difficult to treat with surgical intervention. OBJECTIVE: To detail our experience with the surgical treatment of PTE. METHODS: Patients with a history of head injury undergoing surgical treatment for epilepsy were retrospectively enrolled. Engel classification at the last follow-up was used to assess outcome of patients that underwent surgical resection of an epileptic focus. Reduction in seizure frequency was assessed for patients who underwent vagal nerve stimulator (VNS) or responsive neurostimulator (RNS) implantation. RESULTS: A total of 23 patients met inclusion criteria. Nineteen (82.6%) had mesial temporal sclerosis, 3 had lesional neocortical epilepsy (13.0%), and 1 had nonlesional neocortical epilepsy (4.3%). Fourteen patients (60.9%) underwent temporal lobectomy (TL), 2 underwent resection of a cortical focus (8.7%), and 7 underwent VNS implantation (30.4%). Three patients underwent RNS implantation after VNS failed to reduce seizure frequency more than 50%. In the patients treated with resection, 11 (68.8%) were Engel I, 3 (18.8%) were Engel II, and 2 (12.5%) were Engel III at follow-up. Average seizure frequency reduction in the VNS group was 30.6% ± 25.6%. RNS patients had reduction of seizure severity but seizure frequency was only reduced 9.6% ± 13.6%. CONCLUSION: Surgical outcomes of PTE patients treated with TL were similar to reported surgical outcomes of patients with nontraumatic epilepsy treated with TL. Patients who were not candidates for resection demonstrated variable response rates to VNS or RNS implantation.

The Risk Assessment and Prediction Tool (RAPT) for Discharge Planning in a Posterior Lumbar Fusion Population.

BACKGROUND: As the use of bundled care payment models has become widespread in neurosurgery, there is a distinct need for improved preoperative predictive tools to identify patients who will not benefit from prolonged hospitalization, thus facilitating earlier discharge to rehabilitation or nursing facilities. OBJECTIVE: To validate the use of Risk Assessment and Prediction Tool (RAPT) in patients undergoing posterior lumbar fusion for predicting discharge disposition. METHODS: Patients undergoing elective posterior lumbar fusion from June 2016 to February 2017 were prospectively enrolled. RAPT scores and discharge outcomes were recorded for patients aged 50 yr or more (n = 432). Logistic regression analysis was used to assess the ability of RAPT score to predict discharge disposition. Multivariate regression was performed in a backwards stepwise logistic fashion to create a binomial model. RESULTS: Escalating RAPT score predicts disposition to home (P < .0001). Every unit increase in RAPT score increases the chance of home disposition by 55.8% and 38.6% than rehab and skilled nursing facility, respectively. Further, RAPT score was significant in predicting length of stay (P = .0239), total surgical cost (P = .0007), and 30-d readmission (P < .0001). Amongst RAPT score subcomponents, walk, gait, and postoperative care availability were all predictive of disposition location (P < .0001) for both models. In a generalized multiple logistic regression model, the 3 top predictive factors for disposition were the RAPT score, length of stay, and age (P < .0001, P < .0001 and P = .0001, respectively). CONCLUSION: Preoperative RAPT score is a highly predictive tool in lumbar fusion patients for discharge disposition.

Aneurysm Dome Excision and Picket Fence Clip Reconstruction of a Previously Coiled Recurrent Giant Middle Cerebral Artery Aneurysm: Technical Nuances.

This video case illustrates key surgical steps required in safe management of a giant recurrent previously coiled middle cerebral artery (MCA) aneurysm (Video 1). The patient described in this case was a 68-year-old man who presented with sudden-onset severe headache and dizziness. The patient had a history of a prior coil embolization of a 12-mm left middle cerebral artery aneurysm at an outside hospital. Imaging demonstrated recurrence now of a giant left middle cerebral artery aneurysm with coil compaction and left temporal lobe edema. Magnetic resonance imaging further demonstrated thrombus in the aneurysm and aneurysm wall enhancement concerning for impending rupture. Given the aneurysm size, imaging features, and mass effect, the aneurysm was treated with microsurgical clipping. This case is valuable to the literature with a clear video case illustration of aneurysm dome excision, aneurysm endarterectomy, and picket fence aneurysm neck reconstruction. Aneurysm dome excision is critical for treatment of giant aneurysms causing mass effect and was only used in this case because thrombus and coil mass did not allow for direct clipping across the neck without compromise of the MCA M2 branch. Hence, this video highlights key technical tenets, such as safe thrombus removal and adequate cleaning of the endoluminal surface and preparedness for bypass in challenging cases.

Technical nuances of percutaneous sacroiliac joint fixation: A cadaveric study.

Sacroiliac (SI) joint can produce debilitating lower back pain with radiation to groin, buttocks, and lower extremities. SI joint dysfunction poses a clinical challenge to the spine surgeons. Studies entailing surgical arthrodesis utilizing Titanium implants have been reported with reputedly high level of patient satisfaction. Authors have described technical aspects of surgical technique with use of titanium screw implants. The transarticular technique is used to places SI joint screw implants across the articular portion of SI joint. Cadaveric SI joint instrumentation is performed under fluoroscopic guidance. Moreover, Medline literature search is conducted to study surgical outcome, and patient satisfaction. 4 cadavers are prepped prone for the percutaneous approach. Bilaterally 6 screws are placed using transarticular placement technique under fluoroscopic guidance. The posterior technique utilizes alignment guide to place the screws inline on the inlet view, parallel in the outlet view, and parallel to the dorsal aspect of the sacral body in the lateral view. One C-arm is used in the entire technique. The technical aspects of surgical technique have been described in a stepwise fashion for easy reproducibility in the operating room. Each screw track is checked with tactile feel of a blunt K-wire before final deployment. All bilateral screws were checked on a set of fluoroscopic views. A detail clinical examination, diagnostic joint injection, with the radiological imaging must be considered before surgical consideration. SI Joint fusion utilizing 3 transarticular sacral screws is equally effective and safe procedure to treat chronic lower back pain ensuing from SI joint dysfunction.

Quality of Life in Patients Undergoing Spine Surgery: Systematic Review and Meta-Analysis.

STUDY DESIGN: Meta-analysis. OBJECTIVE: Despite the increasing importance of tracking clinical outcomes using valid patient-reported outcome measures, most providers do not routinely obtain baseline preoperative health-related quality of life (HRQoL) data in patients undergoing spine surgery, precluding objective outcomes analysis in individual practices. We conducted a meta-analysis of pre- and postoperative HRQoL data obtained from the most commonly published instruments to use as reference values. METHODS: We searched PubMed, EMBASE, and an institutional registry for studies reporting EQ-5D, SF-6D, and Short Form-36 Physical Component Summary scores in patients undergoing surgery for degenerative cervical and lumbar spinal conditions published between 2000 and 2014. Observational data was pooled meta-analytically using an inverse variance-weighted, random-effects model, and statistical comparisons were performed. RESULTS: Ninety-nine articles were included in the final analysis. Baseline HRQoL scores varied by diagnosis for each of the 3 instruments. On average, postoperative HRQoL scores significantly improved following surgical intervention for each diagnosis using each instrument. There were statistically significant differences in baseline utility values between the EQ-5D and SF-6D instruments for all lumbar diagnoses. CONCLUSIONS: The pooled HRQoL values presented in this study may be used by practitioners who would otherwise be precluded from quantifying their surgical outcomes due to a lack of baseline data. The results highlight differences in HRQoL between different degenerative spinal diagnoses, as well as the discrepancy between 2 common utility-based instruments. These findings emphasize the need to be cognizant of the specific instruments used when comparing the results of outcome studies.

Initial Assessment of the Risk Assessment and Prediction Tool in a Heterogeneous Neurosurgical Patient Population.

BACKGROUND: Bundled care payments are increasingly being explored for neurosurgical interventions. In this setting, skilled nursing facility (SNF) is less desirable from a cost perspective than discharge to home, underscoring the need for better preoperative prediction of postoperative disposition. OBJECTIVE: To assess the capability of the Risk Assessment and Prediction Tool (RAPT) and other preoperative variables to determine expected disposition prior to surgery in a heterogeneous neurosurgical cohort, through observational study. METHODS: Patients aged 50 yr or more undergoing elective neurosurgery were enrolled from June 2016 to February 2017 (n = 623). Logistic regression was used to identify preoperative characteristics predictive of discharge disposition. Results from multivariate analysis were used to create novel grading scales for the prediction of discharge disposition that were subsequently compared to the RAPT Score using Receiver Operating Characteristic analysis. RESULTS: Higher RAPT Score significantly predicted home disposition (P < .001). Age 65 and greater, dichotomized RAPT walk score, and spinal surgery below L2 were independent predictors of SNF discharge in multivariate analysis. A grading scale utilizing these variables had superior discriminatory power between SNF and home/rehab discharge when compared with RAPT score alone (P = .004). CONCLUSION: Our analysis identified age, lower lumbar/lumbosacral surgery, and RAPT walk score as independent predictors of discharge to SNF, and demonstrated superior predictive power compared with the total RAPT Score when combined in a novel grading scale. These tools may identify patients who may benefit from expedited discharge to subacute care facilities and decrease inpatient hospital resource utilization following surgery.

Evaluation of the Risk Assessment and Prediction Tool for Postoperative Disposition Needs After Cervical Spine Surgery.

BACKGROUND: Bundled care payment models are becoming more prevalent in neurosurgery. Such systems place the cost of postsurgical facilities in the hands of the discharging health system. Opportunity exists to leverage prediction tools for discharge disposition by identifying patients who will not benefit from prolonged hospitalization and facilitating discharge to post-acute care facilities. OBJECTIVE: To validate the use of the Risk Assessment and Predictive Tool (RAPT) along with other clinical variables to predict discharge disposition in a cervical spine surgery population. METHODS: Patients undergoing cervical spine surgery at our institution from June 2016 to February 2017 and over 50 yr old had demographic, surgical, and RAPT variables collected. Multivariable regression analyzed each variable's ability to predict discharge disposition. Backward selection was used to create a binomial model to predict discharge disposition. RESULTS: A total of 263 patients were included in the study. Lower RAPT score, RAPT walk subcomponent, older age, and a posterior approach predicted discharge to a post-acute care facility compared to home. Lower RAPT also predicted an increased risk of readmission. RAPT score combined with age increased the predictive capability of discharge disposition to home vs skilled nursing facility or acute rehabilitation compared to RAPT alone (P < .001). CONCLUSION: RAPT score combined with age is a useful tool in the cervical spine surgery population to predict postdischarge needs. This tool may be used to start early discharge planning in patients who are predicted to require post-acute care facilities. Such strategies may reduce postoperative utilization of inpatient resources.