Biomedical subjects

Manuel Lozano

Publications and source records attributed to Manuel Lozano.

3 recordsLinked to original sources

PubMed2026

Delphi study robot consenso: Strategies for the implementation of robotic surgery in general surgery in the Spanish hospital network.

INTRODUCTION: The implementation of robotic surgery in public hospitals presents multiple logistical, educational, and organizational challenges. In the absence of unified guidelines, a national consensus is required to optimize its safe and efficient adoption. This study aimed to establish a set of consensus-based and measurable recommendations for the implementation of robotic surgery programs in hospitals within the Spanish National Health System, based on the experience of centres with established robotic programs and intended to serve as guidance for hospitals that are initiating or planning their implementation. METHODS: A national Delphi study was conducted with the participation of robotic surgery experts from 26 public hospitals. The expert panel was composed exclusively of digestive surgeons with experience in robotic surgery. Three iterative rounds of expert panel evaluation were conducted between March 2024 and March 2025. The questions were grouped into five thematic blocks. Consensus was defined as an agreement level of ≥66.7%. Kendall's W coefficient was used to assess concordance. RESULTS: High levels of consensus were achieved on key aspects related to infrastructure, structured training, cost evaluation, and quality assurance mechanisms. Areas of disagreement were also identified, such as the need for a dedicated anaesthesiologist, purchase of accessory instruments during the initial phase, and official accreditation pathways. CONCLUSIONS: This study provides a guideline for developing a national robotic surgery strategy focused on patient safety, program sustainability, and standardized training of surgical teams. These recommendations can guide hospitals at different stages of robotic technology adoption. Given that the consensus was reached from an exclusively surgical perspective, the recommendations focus on patient safety, program sustainability, and standardized training of the surgical team, and should be interpreted in an adaptable manner according to each centre's context, case volume, and available resources.

Cirugía Asistida por Robot↗

PubMed2005

[Neurologic complications following hematopoietic stem cell transplantation. Study of 14 patients].

BACKGROUND AND OBJECTIVE: The frequency and cause of neurologic complications (NC) following hematopoietic stem cell transplantation (HSCT) have changed over time. We have analyzed the NC in 185 consecutive patients who underwent HSCT in a period of 5 years in a single HSCT Unit. PATIENTS AND METHOD: 185 consecutive patients underwent HSCT (44 allogeneic) between February 2000 and March 2005 to treat hematologic malignancies. Most frequent diagnoses were multiple myeloma (41 patients) and acute myeloblastic leukemia (n = 35). Demographic and clinical data, HSCT characteristics and procedure-related events with special attention to neurological findings were recorded. Imaging studies (magnetic resonance imaging and/or computerized tomography scan), cerebro-spinal fluid analyses and microbiological studies were performed in all patients developing NC. RESULTS: After a median follow-up of 27 months, 14 patients (7.5%) developed NC, 6 of them after an allogeneic HSCT. The most common conditioning regimen in these patients was BEAM (5/14); 6 patients submitted to allogenic-HSCT received methotrexate and cyclosporin as graft-versus-host disease prophylaxis, and intrathecal prophylaxis of relapse was administered to 3 patients. The median time to the appearance of a NC was 13 days from HSCT (range: -4 to + 135 days). Seizures (8 cases) and encephalopathy (n = 2) were the most frequent clinical manifestations. In 12 cases the cause of the NC was related to drugs, there was one case of viral encephalitis and in the remaining case was caused by hemorrhage. Two patients died, one due to thrombotic thrombocytopenic purpura attributed to cyclosporin and the other due to viral encephalitis. CONCLUSIONS: In our series drug toxicity was the main cause of NC (particularly seizures) following HSCT. Our results contrast with previous studies in which infections, especially of fungal origin, were the main cause of NC. These changes over time should be taken into account during diagnostic procedures.

Adolescent↗

PubMed2004

Real-coded memetic algorithms with crossover hill-climbing.

This paper presents a real-coded memetic algorithm that applies a crossover hill-climbing to solutions produced by the genetic operators. On the one hand, the memetic algorithm provides global search (reliability) by means of the promotion of high levels of population diversity. On the other, the crossover hill-climbing exploits the self-adaptive capacity of real-parameter crossover operators with the aim of producing an effective local tuning on the solutions (accuracy). An important aspect of the memetic algorithm proposed is that it adaptively assigns different local search probabilities to individuals. It was observed that the algorithm adjusts the global/local search balance according to the particularities of each problem instance. Experimental results show that, for a wide range of problems, the method we propose here consistently outperforms other real-coded memetic algorithms which appeared in the literature.

Algorithms↗