Economic implications of localization strategies for cerebrospinal fluid rhinorrhea.

BACKGROUND: The direct costs associated with different diagnostic algorithms to localize cerebrospinal fluid (CSF) rhinorrhea have not been described. METHODS: A decision-tree analysis of imaging modalities used to localize CSF rhinorrhea was performed to compare associated direct costs. The primary outcome was cost, which was determined based on reimbursement data published by the Centers for Medicare and Medicaid Services in 2018. The model was parameterized after a literature review of published studies was performed from 1990 to 2018 to estimate the sensitivity CSF rhinorrhea localization of the following radiographic modalities: high-resolution computed tomography (HRCT), magnetic resonance cisternography (MRC), and CT cisternography (CTC). In addition to base case analysis, 1-way sensitivity analyses were also performed to evaluate the robustness of results to changes in model parameters. RESULTS: Among patients with a high suspicion for CSF rhinorrhea, use of HRCT followed by exploration in the operating room if preliminary HRCT was negative was found to be the optimal localization modality from a cost perspective ($172.25). The next least costly algorithm was HRCT followed by MRC ($294.10). Imaging algorithms beginning with CTC were the next least costly modality ($727.37). Sensitivity analyses generally supported HRCT to be the optimal initial radiographic strategy over a wide range of parameter values. CONCLUSION: This work advocates HRCT as first-line modality to localize CSF rhinorrhea from a cost perspective. Although algorithms beginning with MRC were on average $35 more expensive than those starting with CTC, associated risks of CTC were not modeled and may play a role in decision making.

Clinical and Economic Impact of Time From Admission for CSF Rhinorrhea to Surgical Repair.

BACKGROUND: If conservative management of CSF leak is unsuccessful, surgical repair is indicated for the prevention of severe complications such as meningitis. This study investigated the influence of surgical timing on clinical and economic outcomes. METHODS: Retrospective review of the National Inpatient Sample (2012) and the Nationwide Inpatient Sample (2002-2011) for nonelective admissions with a principal diagnosis of CSF rhinorrhea treated with surgical repair of the meninges. Demographics and outcomes of patients undergoing meningeal repair for CSF rhinorrhea were analyzed. Cases were classified into four groups based on timing of surgical intervention: 1) performed on the day of admission (day 0), 2) performed between days 1 and 3, 3) performed between days 4 and 7, and 4) performed between days 8 and 14. RESULTS: A total of 1,088 emergent admissions were analyzed. On average, patients underwent surgical repair between the second and fourth day of admission. Lowest rates of meningitis were in patients treated on the day of admission (6.1%); those treated at 2 weeks had a 34.7% incidence. Multivariate analysis controlling for comorbidity burden, gender, and surgical timing found the highest odds of meningitis in patients treated with surgical repair during the second week of admission compared to repair on the day of admission (OR 8.2, P < .001). Length of stay (LOS) and hospital costs increased as time to repair increased. CONCLUSION: Multiple factors influence outcomes in patients with CSF rhinorrhea. Early surgical repair was significantly associated with decreased rates of meningitis, LOS, and hospital costs. Expedient treatment of patients admitted for CSF rhinorrhea may prove to be both a cost- and morbidity-saving measure. LEVEL OF EVIDENCE: 2C Laryngoscope, 129:539-543, 2019.

Lower airway disease and pituitary surgery: Is there an association with postoperative cerebrospinal fluid leak?

OBJECTIVES/HYPOTHESIS: To explore the relationship between lower airway disease and postoperative cerebrospinal fluid (CSF) rhinorrhea among patients undergoing pituitary surgery STUDY DESIGN: Retrospective review. METHODS: A retrospective review of the Healthcare Cost and Utilization Project's 2013 National Inpatient Sample was conducted to characterize the hospital stay and surgical outcomes of patients undergoing pituitary surgery. Patients with lower airway disease (including chronic obstructive pulmonary disease and asthma) were compared to a disease-free population identifying demographics and complications over-represented in the lower airway group. RESULTS: The majority of hypophysectomies (92.1%) were performed via a transsphenoidal approach. Among transsphenoidal patients, individuals with asthma (92.8% of the lower airway disease cohort) harbored a greater postoperative CSF leak rate (4.7% vs. 2.7%, P = .022), and were more likely to develop postoperative diabetes insipidus (6.2% vs. 4.1%, P = .024) and neurological complications (13.0% vs. 9.6%, P = .010) when compared to a lower airway disease-free cohort. Patients with CSF rhinorrhea had longer lengths of stay (7.8 days vs. 4.5 days, P < .001) and higher discharge costs ($148,309 vs. $76,246, P < .001). A binary logistic regression model identified having asthma (P = .042), being female (P = .011), and having gastroesophageal reflux disease (P = .006) as independent predictors of postoperative CSF rhinorrhea. CONCLUSIONS: Several patient comorbidities including asthma are associated with a greater risk of postoperative CSF rhinorrhea. Perioperative lower airway assessment and disease control may potentially decrease one's risk of this complication, although further inquiry is urgently needed to identify optimal preventive strategies. LEVEL OF EVIDENCE: 2c. Laryngoscope, 127:1543-1550, 2017.

Pharmacoeconomical consequences of postoperative CSF leaks after intracranial surgery--a prospective analysis.

Cerebrospinal fluid (CSF) leaks are well-known and frequent complications of intracranial procedures with their clinical aspects covered by numerous studies. Little, however, is known about the pharmacoeconomical aspects of this specific complication. 545 patients with a variety of intracranial procedures (elective and trauma) were recruited for a multicenter, prospective, observational study over a 13-month period. A specific pharmacoeconomic analysis was performed in 168 of these patients from the institution of the first author covering all clinical and pharmaco-economical aspects of this specific complication. Of all patients, 5.36% developed a postoperative CSF leak. Treatment of the leak required numerous diagnostic and therapeutic procedures such as reoperations (n = 6), lumbar punctures (n = 11) or lumbar drainages (n = 4). Costs for these procedures and prolonged hospital stays nearly doubled the costs per case (€14079/case without a fistula vs. €25499/case with a fistula). Reimbursement for the hospital covered these extra costs, but net earnings per case were diminished by €565 in cases with a CSF leak. The authors conclude that the presence of a CSF leak after an intracranial operation - although not influencing outcome in general - results in additional diagnostic and therapeutic procedures for the patient, an enormous increase in costs for the community, and a financial loss for the hospital. Strategies to lower this complication rate should therefore urgently be developed both from a clinical and a pharmacoeconomical point of view.