[Evaluation of the economic impact and the patient pathway in the treatment of chronic total occlusion].

Objectives: Chronic total occlusion (CTO) of coronary arteries is defined as complete absence of antegrade coronary flow without iodine passage, since more than 3 months. Coronary revascularization is a highly resource-intensive angioplasty procedure involving numerous medical devices (MDs). Its consumption and associated costs are not covered by either the medical act classification (CCAM) or the hospitalization fees and additional MD funding. The primary aim of this study is to analyze the financial sustainability of this activity for a public healthcare institution and to assess the budgetary impact of CTO treatment on the most expensive items of expenditure. The secondary aim is to describe the patient's intra-hospital pathway.

Methods: CTO revascularization stays are categorized under the code 05K06 "Vascular Stents without Myocardial Infarction". Major cost items were identified using national coded expenditure data and compared with those from our cost study. Every CTO intervention from January to November 2021 were retrospectively retrieved. Establishment purchase prices in 2021 were used to determine MD costs. Clinical data were extracted from electronic patient records. Operative data (procedure duration, professionals involved, and MD used) were extracted. Human Resources (HR) costs were integrated into the calculations. A Sankey diagram was created. Data are expressed as mean±standard deviation.

Results: In our study, 41 patients underwent 45 interventions. The median was 65 years. Seventy-eight percent of interventions were successful with a median duration of 113minutes. Two hundred and two different MD references were used, with 27% reimbursed additionally and 73% funded within the homogeneous group of stays (HGS). The total cost of MD described in the coded expenditure data is 2142€, of which 721€ is funded within the HGS. In our cohort, it represented averages of 2736€±1393€ and 1710€±926€, respectively. Regarding HR, the total cost described in the coded expenditure data was 442€ compared to 410€±169€ in our cohort. Finally, patient pathway analysis showed an average length of stay (LOS) of 1.8 days. Two pathways were identified depending on admission context: weekday hospitalization or cardiac intensive care.

Conclusions: CTO revascularization is a planned intervention with a short LOS and a highly standardized patient pathway. Our study highlights a proliferation of MD references used during CTO revascularization due to innovative industrial developments. The cost differential with coded expenditure data confirms the need for a revision of the procedure and its categorization within an HGS, which is currently non-specific.