Observational Pilot Study With TachoSil as a Ventricular Sealant

Pilot observational study with medications (MOE), single-center, prospective and retrospective study with a group of patients operated on for periventricular lesions and with ventricular entry. As it is an infrequent type of surgery in our centre, the study includes a retrospective group (same surgery and use of TachoSil). Primary objectives: The main objective of the study is to evaluate the effectiveness and safety of TachoSil in patients who require ventricular entry. To evaluate the effectiveness, the percentage of complications related to the ventricular entry during surgery are recorded. These complications are hydrocephalus, CSF leak, meningitis, and pseudomeningocele. Secondary objectives * Intraoperative incidence of fistula after application of the ventricular patch at 20cm PEEP H20 (efficacy objective). * Incidence of clinically confirmed percutaneous fistula during the first 30 days after surgery (efficacy objective). * Incidence of pseudomeningocele \>20cc confirmed with MRI or ultrasound (effectiveness objective). * Incidence of radiologically confirmed hydrocephalus during the first 90 days after of the surgery. * Record the percentage of use of other dural sealants * Evaluate the cost effectiveness of the product. * Describe the adverse effects related to the product * Incidence of complication requiring reintervention within 30 days to the main surgery (safety objective). * Assessment of the complications that are avoided: readmissions. Study period: from December 2020 to December 2023.