Neurosurgery perception of Enhanced Recovery After Surgery (ERAS) protocols.

Enhanced Recovery After Surgery (ERAS) protocols are widespread in several fields, particularly general surgery, and attempt to deliver surgical care at a lower cost while also improving patient outcomes. However, few institutions have implemented ERAS protocols in neurosurgery. As such, a survey of neurosurgeons on the current state of ERAS in neurosurgery was conducted to provide insight on scaling the practice nationally. A 15-question survey was designed to assess the implementation of andsatisfaction with ERAS protocols at individual institutions. A total of 39 responses were collected from 38 unique institutions. 58.9%(N = 23) reported implementation of neurosurgical ERAS protocols. 52.1% (N = 12) of the responses were neurosurgeons at academic institutions withneurosurgical residency programs. Most neurosurgeons used ERAS protocolsfor spine cases (N = 23), with only 17.3% (N = 4) employing ERAS protocolsfor cranial cases. 69.5% (N = 16) of survey participants reported that thedesign and implementation of ERAS was a multidisciplinary effort acrossmany departments, including neurosurgery, anesthesia, and pharmacy.Decreased costs and intensive care unit (ICU) admission were reported tobe unanticipated benefits of ERAS implementation. Unanticipated challenges to implementation of new protocols included difficulties withelectronic medical record (EMR) integration, agreement of protocoldetails amongst stakeholders, uniform implementation of protocols by allneurosurgeons, and lack of adaptability by multidisciplinary staff. Meandepartment satisfaction with ERAS protocol implementation was 4.00 +/- 0.81 (N = 22) on a 5-point Likert scale.

Neurosurgery Billing and Reimbursement in 2021.

Practicing neurosurgery in 2021 requires a detailed knowledge of the vocabulary and mechanisms for coding and reimbursement, which should include general knowledge at the global level and fluency at the provider level. It is specifically of interest for the neurosurgeon to understand conceptually the nuances of hospital reimbursement. That knowledge is especially germane as more neurosurgeons become hospital employees. Here we provide an overview of the mechanics of coding. We illustrate the formula to generate physician reimbursement through the current relative value unit structure. We also seek to explain hospital-level reimbursement through the diagnosis-related group structure. Finally, we expand about different and ancillary income streams available to neurosurgeons and provide a realistic assessment including the opportunities and challenges of those entities.

Socioeconomic Implications of Professional Relationships within Modern Care Delivery Systems.

No physician can successfully deliver high-value patient care in the modern-day health care system in isolation. Delivery of effective patient care requires integrated and collaborative systems that depend on dynamic professional relationships among members of the health care team. An overview of the socioeconomic implications of professional relationships within modern care delivery systems and potential employment models is presented.

Credentialing, Certification, and Peer Review Essentials for the Neurosurgeon.

Credentialing and certification are essential processes during hiring to ensure that the physician is competent and possesses the qualifications and skill sets claimed. Peer review ensures the continuing evolution of these skills to meet a standard of care. We have provided an overview and discussion of these processes in the United States. Credentialing is the process by which a physician is determined to be competent and able to practice, used to ensure that medical staff meets specific standards, and to grant operative privileges at an institution. Certification is a standardized affirmation of a physician's competence on a nationwide basis. Although not legally required to practice in the United States, many institutions emphasize certification for full privileges on an ongoing basis at a hospital. In the United States, peer review of adverse events is a mandatory prerequisite for accreditation. The initial lack of standardization led to the development of the Health Care Quality Improvement Act, which protects those involved in the peer review process from litigation, and the National Provider Databank, which was established as a national database to track misconduct. A focus on quality improvement in the peer review process can lead to improved performance and patient outcomes. A thorough understanding of the processes of credentialing, certification, and peer review in the United States will benefit neurosurgeons by allowing them to know what institutions are looking for as well and their rights and responsibilities in any given situation. It could also be useful to compare these policies and practices in the United States to those in other countries.

Advocacy to Government and Stakeholders.

Participation in the health care and government advocacy arena may represent new and challenging perspectives for the traditional neurosurgeon. However, those with a strong understanding of the laws, rules, regulations, and fiscal allocation process can directly influence the practice of neurosurgery in the United States. We seek to shine light on the black box of how health care laws are passed, the influence and techniques of lobbying, and the role and rules surrounding political action committees. This practical review of health care advocacy is supplemented by a blueprint for engagement in the political arena for the practicing neurosurgeon.

Optimizing Medical Care Via Practice Guidelines and Quality Improvement Initiatives.

In an effort, to curtail rising health care costs, government and private payers have begun to focus on measuring quality of care. Along with quality improvement initiatives, clinical practice guidelines may also be utilized to provide better care. Clinical practice guidelines are recommendations for clinicians about the care of patients with specific conditions. This review provides an overview of clinical practice guidelines and quality improvement initiatives to highlight strategies to optimize patient outcomes.

Use of Standardized History and Physical Examination for Neurosurgical Patients Improves Clinical Documentation and Reimbursement.

BACKGROUND: Documentation is the cornerstone of good patient care and vital to proper coding and billing. Consistent and standardized documentation improves communication among physicians and can lead to better reimbursement. By understanding which elements in the neurosurgery history and physical examination are omitted the most often and the effects on the coding level, institutional-specific solutions can be implemented. METHODS: We performed a retrospective study of neurosurgical patients at a single academic institution who undergone a neurosurgery history and physical examination for an initial inpatient admission from July 2015 to July 2016. The data collected included documentation type (typed, dictated, dynamic documentation without a template, neurosurgery history and physical examination template [NHPT]) and ultimate coding level (1, 2, or 3) determined by a review by a professional coder. RESULTS: A total of 609 notes were reviewed. Of the 609 notes, 88 (14.4%) were missing an element of documentation. The most common missing element was the physical examination (40 of 88; 45.5%), followed by a combination (27 of 88; 30.7%), review of systems (14 of 88; 15.9%), and medical, family, and/or social history (7 of 88; 8.0%). The dynamic documentation without template notes had the highest percentage of missing elements (49 of 96; 51.0%), followed by the typed notes (7 of 49; 14.3%) and dictated notes (30 of 268; 11.2%) compared with the NHPT notes (2 of 196; 1.0%). CONCLUSION: The most common missing elements for inpatient neurosurgery documentation were the review of systems and physical examination. The documents with the highest percentage of missing elements were those that used dynamic documentation without a template. We recommend implementing a dedicated NHPT to improve capturing these elements for improved clinical documentation. Such changes could also improve the coding level and subsequent reimbursement.

For the further training of individuals in neurosurgery: a history of the William P. Van Wagenen Fellowship.

The William P. Van Wagenen Fellowship, celebrating its 50th anniversary, is an annual award given by the AANS and administered by the Neurosurgery Research and Education Foundation (NREF). Named after its benefactor, Dr. William Van Wagenen, the fellowship continues his legacy of mentorship and innovation. As the premier research award for young neurosurgeons, it has provided a foundation for career development for many thought leaders in the field. The award was created in the spirit of Van Wagenen's belief in collaboration with other institutions as a means of refining neurosurgical technique, creating new research initiatives, and improving patient outcomes. Van Wagenen's commitment was informed by his early experiences in neurosurgery with his mentor Dr. Harvey Cushing, who helped to fund Van Wagenen's scientific endeavors in Europe. This journey catalyzed Van Wagenen's lifelong commitment to mentorship, which is exemplified by his instrumental role in the creation of the Harvey Cushing Society, now the AANS. Over the last 50 years, the recipients of this award have used the endowment to lay the groundwork for many scientific and technical innovations in neurosurgery. The fellowship remains an unmatched opportunity to explore new lines of investigation, foster academic and research goals, incorporate new technology and skills into American neurosurgical practice, and motivate young neurosurgeons to transform the field. The legacy of mentorship, scientific inquiry, and clinical excellence personified by Cushing and Van Wagenen is memorialized in the William P. Van Wagenen Fellowship.

Systematic Review of Safety and Cost-Effectiveness of Venous Thromboembolism Prophylaxis Strategies in Patients Undergoing Craniotomy for Brain Tumor.

BACKGROUND: Studies have evaluated various strategies to prevent venous thromboembolism (VTE) in neuro-oncology patients, without consensus. OBJECTIVE: To perform a systematic review with cost-effectiveness analysis (CEA) of various prophylaxis strategies in tumor patients undergoing craniotomy to determine the safest and most cost-effective prophylaxis regimen. METHODS: A literature search was conducted for VTE prophylaxis in brain tumor patients. Articles reporting the type of surgery, choice of VTE prophylaxis, and outcomes were included. Safety of prophylaxis strategies was determined by measuring rates of VTE and intracranial hemorrhage. Cost estimates were collected based on institutional data and existing literature. CEA was performed at 30 d after craniotomy, comparing the following strategies: mechanical prophylaxis (MP), low molecular weight heparin with MP (MP+LMWH), and unfractionated heparin with MP (MP+UFH) to prevent symptomatic VTE. All costs were reported in 2016 US dollars. RESULTS: A total of 34 studies were reviewed (8 studies evaluated LMWH, 12 for MP, and 7 for UFH individually or in combination; 4 studies used LMWH and UFH preoperatively). Overall probability of VTE was 1.49% (95% confidence interval (CI) 0.42-3.72) for MP+UFH, 2.72% [95% CI 1.23-5.15] for MP+LMWH, and 2.59% (95% CI 1.31-4.58) for MP, which were not statistically significant. Compared to a control of MP alone, the number needed to treat for MP+UFH is 91 and 769 for MP+LMWH. The risk of intracranial hemorrhage was 0.26% (95% CI 0.01-1.34) for MP, 0.74% (95% CI 0.09-2.61) for MP+UFH, and 2.72% (95% CI 1.23-5.15) for MP+LMWH, which were also not statistically significant. Compared to MP, the number needed to harm for MP+UFH was 208 and for MP+LMWH was 41. Fifteen studies were included in the final CEA. The estimated cost of treatment was $127.47 for MP, $142.20 for MP+UFH, and $169.40 for MP+LMWH. The average cost per quality-adjusted life-year for different strategies was $284.14 for MP+UFH, $338.39 for MP, and $722.87 for MP+LMWH. CONCLUSION: Although MP+LMWH is frequently considered the optimal prophylaxis for VTE risk reduction, our model suggests that MP+UFH is the safest and most cost-effective measure to balance VTE and hemorrhage risks in brain tumor patients at lower risk of hemorrhage. MP+LMWH may be more effective for patients at higher risk of VTE.

Risk Factors Associated with Readmission and Reoperation in Patients Undergoing Spine Surgery.

OBJECTIVE: Reoperation and readmission are often avoidable, costly, and difficult to predict. We sought to identify risk factors for readmission and reoperation after spine surgery and to use these factors to develop a scoring system predictive of readmission and reoperation. METHODS: The National Surgical Quality Improvement Project database for years 2012 to 2014 was reviewed for patients undergoing spinal surgery, and 68 perioperative characteristics were analyzed. RESULTS: A total of 111,892 patients who underwent spinal surgery were identified. The rate of reoperation was 3.1%, the rate of readmission was 5.2%, and the occurrence of either was 6.6%. Multivariate analysis found 20 perioperative factors significantly associated with both readmission and reoperation. Preoperative and operative factors found significant included age >60 years, African-American race, recent weight loss, chronic steroid use, on dialysis, blood transfusion required, American Society of Anesthesiologists classification ≥3, contaminated wound, >10% probability of experiencing morbidity, and operative time >3 hours. Postoperative associations identified included urinary tract infection, stroke, dehiscence, pulmonary embolism, sepsis, septic shock, deep and superficial surgical site infection, reintubation, and failure to wean from ventilator. An unweighted and weighted risk score were generated that yielded receiver operating characteristic curves with areas under the curve of 0.707 (95% confidence interval [CI]: 0.701-0.713) and 0.743 (95% CI: 0.736-0.749) 0.708 (95% CI: 0.702-0.715), respectively. CONCLUSIONS: Patients with an unweighted score ≥7 had a more than 20-fold increased risk of reoperation or readmission and a more than 1000-fold increased risk of mortality than did patients with a score of 0.

Risk factors for wound complications following spine surgery.

BACKGROUND: Wound complications, including surgical site infections (SSIs) and wound dehiscence, are among the most common complications following spine surgery often leading to readmission. The authors sought to identify preoperative characteristics predictive of wound complications after spine surgery. METHODS: The American College of Surgeons National Surgical Quality Improvement Program database for years 2012-2014 was reviewed for patients undergoing spine surgery, defined by the Current Procedural Terminology codes. Forty-four preoperative and surgical characteristics were analyzed for associations with wound complications. RESULTS: Of the 99,152 patients included in this study, 2.2% experienced at least one wound complication (superficial SSI: 0.9%, deep SSI: 0.8%, organ space SSI: 0.4%, and dehiscence: 0.3%). Multivariate binary logistic regression testing found 10 preoperative characteristics associated with wound complications: body mass index ≥30, smoker, female, chronic steroid use, hematocrit <38%, infected wound, inpatient status, emergency case, and operation time >3 hours. A risk score for each patient was created from the number of characteristics present. Receiver operating characteristic curves of the unweighted and weighted risk scores generated areas under the curve of 0.701 (95% CI: 0.690-0.713) and 0.715 (95% CI: 0.704-0.726), respectively. Patients with unweighted risk scores >7 were 25-fold more likely to develop a wound complication compared to patients with scores of 0. In addition, mortality rate, reoperation rate, and total length of stay each increased nearly 10-fold with increasing risk score. CONCLUSION: This study introduces a novel risk score for the development of wound dehiscence and SSIs in patients undergoing spine surgery, using new risk factors identified here.

Preoperative Frailty Score for 30-Day Morbidity and Mortality After Cranial Neurosurgery.

BACKGROUND: Evaluating preoperative frailty is critical for guiding shared surgical decision-making. The purpose of this study was to develop a novel preoperative frailty index for classification of adverse outcomes following cranial neurosurgery procedures. METHODS: The American College of Surgeons National Surgical Quality Improvement Program database was queried for all cranial neurosurgery cases from 2006 to 2014. Sequential univariate and multivariate testing was used to identify significant independent predictors of 30-day mortality. Frailty scores were computed by summating across weighted predictors. Receiver operating characteristic curve analysis quantified the discriminative capacity of the frailty score for classifying mortality and other major adverse outcomes. RESULTS: List-wise exclusion of patients with incomplete datasets yielded a final sample of 27,098 patients (mortality rate = 3.9%). Multivariate regression testing identified 19 independent predictors of 30-day mortality. Receiver operating characteristic curve analysis revealed impressive outcome discrimination (area under the curve = 0.87, P < 0.001, optimal classification accuracy = 83.0%). Patients in the "high-risk" group (score ≥4, n = 5155) had significantly increased risk for mortality (15.4%) and major adverse outcomes (32.0%) compared with patients in the "low-risk" group (n = 21,943, mortality = 1.2%, major adverse outcomes = 4.0%). The frailty score remained highly discriminative across all age groups examined. CONCLUSIONS: Neurosurgical patients undergo extensive preoperative evaluation, but the field currently lacks a robust bedside scoring system for quantifying patient frailty. In this study, we introduced a novel preoperative frailty index capable of classifying 30-day morbidity and mortality outcomes following cranial neurosurgeries.

Risk factors associated with venous thromboembolism in patients undergoing spine surgery.

OBJECTIVE Patients undergoing spinal surgery are at risk for developing venous thromboembolism (VTE). The authors sought to identify risk factors for VTE in these patients. METHODS The American College of Surgeons National Surgical Quality Improvement Project database for the years 2006-2010 was reviewed for patients who had undergone spinal surgery according to their primary Current Procedural Terminology code(s). Clinical factors were analyzed to identify associations with VTE. RESULTS Patients who underwent spinal surgery (n = 22,434) were identified. The rate of VTE in the cohort was 1.1% (pulmonary embolism 0.4%; deep vein thrombosis 0.8%). Multivariate binary logistic regression analysis revealed 13 factors associated with VTE. Preoperative factors included dependent functional status, paraplegia, quadriplegia, disseminated cancer, inpatient status, hypertension, history of transient ischemic attack, sepsis, and African American race. Operative factors included surgery duration > 4 hours, emergency presentation, and American Society of Anesthesiologists Class III-V, whereas postoperative sepsis was the only significant postoperative factor. A risk score was developed based on the number of factors present in each patient. Patients with a score of ≥ 7 had a 100-fold increased risk of developing VTE over patients with a score of 0. The receiver-operating-characteristic curve of the risk score generated an area under the curve of 0.756 (95% CI 0.726-0.787). CONCLUSIONS A risk score based on race, preoperative comorbidities, and operative characteristics of patients undergoing spinal surgery predicts the postoperative VTE rate. Many of these risks can be identified before surgery. Future protocols should focus on VTE prevention in patients who are predisposed to it.

Geographic variation in cost of care for pituitary tumor surgery.

PURPOSE: Geography is known to affect cost of care in surgical procedures. Understanding the relationship between geography and hospital costs is pertinent in the effort to reduce healthcare costs. We studied the geographic variation in cost for transsphenoidal pituitary surgery in hospitals across New York State. METHODS: Using the Healthcare Cost and Utilization Project State Inpatient Database for New York from 2008 to 2011, we analyzed records of patients who underwent elective transsphenoidal pituitary tumor surgery and were discharged to home or self-care. N.Y. State was divided into five geographic regions: Buffalo, Rochester, Syracuse, Albany, and Downstate. These five regions were compared according to median charge and cost per day. RESULTS: From 2008 to 2011, 1803 transsphenoidal pituitary tumor surgeries were performed in New York State. Mean patient age was 50.7 years (54 % were female). Adjusting prices for length of stay, there was substantial variation in prices. Median charges per day ranged from $8485 to $13,321 and median costs per day ranged from $2962 to $6837 between the highest and lowest regions from 2008 to 2011. CONCLUSION: Within New York State, significant geographic variation exists in the cost for transsphenoidal pituitary surgery. The significance of and contributors to such variation is an important question for patients, providers, and policy makers. Transparency of hospital charges, costs, and average length of stay for procedures to the public provides useful information for informed decision-making, especially for a highly portable disease entity like pituitary tumors.

Conservative management of a cervical ligamentum flavum hematoma: Case report.

BACKGROUND: Spontaneous epidural hematoma arising from the ligamentum flavum is a rare cause of acute spinal cord compression. There are only four reports in the cervical spine literature, and all were managed with surgery. Here, we describe an acute case of a spontaneous epidural hematoma arising from the ligamentum flavum in the cervical spine successfully managed without surgery. CASE DESCRIPTION: A 69-year-old woman with a cervical spine epidural hematoma contained within the ligamentum flavum presented with paroxysmal neck pain and stiffness without a history of trauma. The magnetic resonance imaging (MRI) revealed a posterolateral epidural hematoma contained within the ligamentum flavum. As the patient was intact, she was managed conservatively with cervical orthosis. Three months later, she was symptom-free, and the hematoma resolved on the follow-up MRI study. CONCLUSION: Spontaneous epidural hematoma arising from ligamentum flavum is a rare cause of spinal cord compression. Previous reports have described success with surgical decompression. However, initial observation and conservative management may be successful as illustrated in this case.

Risk of Reoperation for Hemorrhage in Patients After Craniotomy.

OBJECTIVE: To identify clinical factors predictive of patients returning to the operating room (OR) for hemorrhage after craniotomy. METHODS: A national surgical quality database (American College of Surgeons National Surgical Quality Improvement Project) was reviewed for patients undergoing craniotomy based on Current Procedural Terminology (CPT) code. CPT codes were also used to identify patients returning to the OR for hemorrhage. RESULTS: Of 5520 patients who underwent craniotomy in 2012, 81 (1.5%) had a reoperation for hematoma evacuation. Preoperative and intraoperative factors associated with reoperation for hemorrhage included preexisting hypertension, bleeding disorder, and primary craniotomy for hematoma evacuation. Postoperative factors included ventilator dependence >48 hours, unplanned reintubation, and blood transfusion during or after the index operation. A risk score based on these factors was predictive of reoperation for hemorrhage with a receiver operating characteristic area under the curve of 0.767. Restricting the score to preoperative factors was still predictive of reoperation (area under the curve = 0.683). CONCLUSIONS: Reoperation for evacuation of hematoma is influenced by several clinical factors. A risk score based on these factors is predictive of return to the OR and may be used to identify patients at risk.

Acute Presentation of Chiari I Malformation with Hemiparesis in a Pediatric Patient.

BACKGROUND: Chiari I malformation (CM-I) is defined by cerebellar tonsillar herniation through the foramen magnum. Patients typically present with chronic complaints, including headache, dizziness, and numbness, although there are few reports in the literature of pediatric patients presenting acutely with neurological deficit caused by CM-I. We report a child who presented acutely with hemiparesis and magnetic resonance imaging findings consistent with CM-I and spinal cord edema. CASE DESCRIPTION: A 3-year old boy with normal development presented with difficulty walking and increased drooling. His mother stated he was running into objects and had balance issues for several days. Neurological examination showed ataxia with falling to the right after a few steps and weakness of the right arm and leg. His medical history was remarkable only for mild asthma, although he had recently been treated for an upper respiratory viral infection. Computed tomography of the head demonstrated no brainstem mass. Magnetic resonance imaging of the head and cervical spine showed tonsillar ectopia approximately 2 cm below the craniocervical junction with increased T2 signal in the spinal cord from C1 to C3 consistent with syringomyelia and cord edema. The patient underwent suboccipital craniectomy with removal of the posterior arch of C1 and dural patch graft. His postoperative course was unremarkable, with complete resolution of his symptoms at his 1-month follow-up visit. CONCLUSIONS: This case highlights an unusual presentation of CM-I with neurological deficit related to spinal cord edema, possibly precipitated by the "water-hammer" effect of this patient's coughing fits. Providers should be aware of the acute presentations of CM-I.

Risk Modeling Predicts Complication Rates for Spinal Surgery.

STUDY DESIGN: Retrospective review of clinical data registry. OBJECTIVE: In the current era of quality reporting and pay for performance, neurosurgeons must develop models to identify patients at high risk of complications. We sought to identify risk factors for complications in spine surgery and to develop a score predictive of complications. SUMMARY OF BACKGROUND DATA: We examined spinal surgeries from the American College of Surgeons National Surgical Quality Improvement Project (ACS-NSQIP) database. 22,430 cases were identified based on common procedural terminology. METHODS: Univariate analysis followed by multivariate regression was used to identify significant factors. RESULTS: The overall complication rate for the cohort was 9.9%. The most common complications were postoperative bleeding requiring transfusion (4.1%), nonwound infections (3.1%), and wound-related infections (2.2%). Multivariate regression analysis identified 20 factors associated with complications. Assigning 1 point for the presence of each factor a risk model was developed. The range of scores for the cohort was 0 to 13 with a median score of 4. Complication rates for a risk score of 0 to 4 was 3.7% and for scores 5 to 13 was 18.5%. The risk model robustly predicted complication rates, with complication rate of 1.2% for score of 0 (n = 412, 1.8% of total) and 63.6% and 100% for scores of 12 and 13 (n = 22 patients, 0.1% of total cohort) respectively (P < 0.001). The risk score also correlated strongly with total length of stay, mortality, and total work relative value units for the case. CONCLUSION: Patient-specific risk factors including comorbidities are strongly associated with surgical complications, length of stay, cost of care, and mortality in spine surgery and can be used to develop risk models that are highly predictive of complications. LEVEL OF EVIDENCE: 3.

Comparative Effectiveness Analysis of Treatment Options for Single Brain Metastasis.

BACKGROUND: Brain metastases (BMs) occur in up to 30% of patients with cancer. Treatments include surgery, whole-brain radiotherapy (WBRT), and stereotactic radiosurgery (SRS), alone or in combination. Although guidelines exist, data to inform individualized approaches to therapy remain sparse. We sought to compare semiquantitatively the effectiveness of various modalities in the treatment of single brain metastasis. METHODS: We performed a comparative effectiveness analysis (CEA) that integrated efficacy, cost, and quality of life (QoL) data for alternate BM treatments. Efficacy data were obtained from a comprehensive review of current literature. Cost estimates were based on publicly available data. QoL data included the Karnofsky Performance Status (KPS) and other questionnaires. Six treatment strategies using combinations of surgery, WBRT, and SRS were compared with decision tree software. RESULTS: The clinical efficacy, cost, and QoL effects of each strategy were scored semiquantitatively. We constructed a model to integrate individual preferences regarding the relative importance of efficacy, QoL, and cost to provide personalized rankings of the effectiveness of each strategy. CONCLUSION: The choice of strategy must be individualized for patients with a single BM. Our CEA and decision model combines empirical data with patient priorities to produce a ranking of alternate management strategies.

Analysis of Venous Thromboembolism Risk in Patients Undergoing Craniotomy.

OBJECTIVES: Craniotomy poses a risk for postoperative venous thromboembolism (VTE), but the utility of anticoagulation in this patient population is unclear. We sought to identify risk factors predictive of VTE in patients undergoing craniotomy. METHODS: The American College of Surgeons National Surgical Quality Improvement Project (ACS-NSQIP) database was reviewed for patients undergoing craniotomy. Clinical factors provided by the database were analyzed for association with VTE. RESULTS: A total of 10,477 adult patients who underwent craniotomy from 2011-2012 were identified. The rate of VTE was 3.2% (pulmonary embolism [PE] was 1.3%; deep vein thrombosis [DVT] was 2.4%). Several factors were significant in univariate analysis, and a subset persisted after multivariate analysis. Patients were assigned a risk score on the basis of the presence of those variables. Higher risk scores were predictive of VTE risk, as well as increasing time from surgery to discharge and mortality. A receiver operating characteristics curve revealed a significant area under the curve (0.719) for scores being predictive of VTE risk. The model was validated against our similar analysis of 2006-2010 NSQIP data and demonstrated comparable findings. CONCLUSIONS: The risk of postoperative VTE after craniotomy can be quantified by a simple risk score, with increasing risk factors conferring increased risk of VTE. On the basis of risk scoring, a subset of patients who would benefit from anticoagulation post craniotomy may be identified.