New models for donor-recipient matching in lung transplantations. 2021

J M Dueñas-Jurado, and P A Gutiérrez, and A Casado-Adam, and F Santos-Luna, and A Salvatierra-Velázquez, and S Cárcel, and C J C Robles-Arista, and C Hervás-Martínez
Intensive Care Unit, Reina Sofia University Hospital, Cordoba, Spain.

One of the main problems of lung transplantation is the shortage of organs as well as reduced survival rates. In the absence of an international standardized model for lung donor-recipient allocation, we set out to develop such a model based on the characteristics of past experiences with lung donors and recipients with the aim of improving the outcomes of the entire transplantation process. This was a retrospective analysis of 404 lung transplants carried out at the Reina Sofía University Hospital (Córdoba, Spain) over 23 years. We analyzed various clinical variables obtained via our experience of clinical practice in the donation and transplantation process. These were used to create various classification models, including classical statistical methods and also incorporating newer machine-learning approaches. The proposed model represents a powerful tool for donor-recipient matching, which in this current work, exceeded the capacity of classical statistical methods. The variables that predicted an increase in the probability of survival were: higher pre-transplant and post-transplant functional vital capacity (FVC), lower pre-transplant carbon dioxide (PCO2) pressure, lower donor mechanical ventilation, and shorter ischemia time. The variables that negatively influenced transplant survival were low forced expiratory volume in the first second (FEV1) pre-transplant, lower arterial oxygen pressure (PaO2)/fraction of inspired oxygen (FiO2) ratio, bilobar transplant, elderly recipient and donor, donor-recipient graft disproportion requiring a surgical reduction (Tailor), type of combined transplant, need for cardiopulmonary bypass during the surgery, death of the donor due to head trauma, hospitalization status before surgery, and female and male recipient donor sex. These results show the difficulty of the problem which required the introduction of other variables into the analysis. The combination of classical statistical methods and machine learning can support decision-making about the compatibility between donors and recipients. This helps to facilitate reliable prediction and to optimize the grafts for transplantation, thereby improving the transplanted patient survival rate.

UI MeSH Term Description Entries
D008297 Male Males
D009927 Tissue and Organ Procurement The administrative procedures involved with acquiring TISSUES or organs for TRANSPLANTATION through various programs, systems, or organizations. These procedures include obtaining consent from TISSUE DONORS and arranging for transportation of donated tissues and organs, after TISSUE HARVESTING, to HOSPITALS for processing and transplantation. Organ Procurement,Organ Procurement Systems,Organ Shortage,Tissue Procurement,Tissue Shortage,Donor Cards,Organ Donation,Required Organ Donation Request,Required Request,Tissue Donation,Donor Card,Organ Donations,Organ Procurement System,Organ Procurements,Required Requests,Shortage, Tissue,Tissue Donations,Tissue Procurements,Tissue Shortages
D005260 Female Females
D006085 Graft Survival The survival of a graft in a host, the factors responsible for the survival and the changes occurring within the graft during growth in the host. Graft Survivals,Survival, Graft,Survivals, Graft
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013030 Spain Country located between France on the northeast and Portugal on the west and bordered by the Atlantic Ocean and the Mediterranean Sea. The capital is Madrid. Balearic Islands,Canary Islands
D014019 Tissue Donors Individuals supplying living tissue, organs, cells, blood or blood components for transfer or transplantation to histocompatible recipients. Organ Donors,Donors,Ovum Donors,Semen Donors,Transplant Donors,Donor,Donor, Organ,Donor, Ovum,Donor, Semen,Donor, Tissue,Donor, Transplant,Donors, Organ,Donors, Ovum,Donors, Semen,Donors, Tissue,Donors, Transplant,Organ Donor,Ovum Donor,Semen Donor,Tissue Donor,Transplant Donor
D015996 Survival Rate The proportion of survivors in a group, e.g., of patients, studied and followed over a period, or the proportion of persons in a specified group alive at the beginning of a time interval who survive to the end of the interval. It is often studied using life table methods. Cumulative Survival Rate,Mean Survival Time,Cumulative Survival Rates,Mean Survival Times,Rate, Cumulative Survival,Rate, Survival,Rates, Cumulative Survival,Rates, Survival,Survival Rate, Cumulative,Survival Rates,Survival Rates, Cumulative,Survival Time, Mean,Survival Times, Mean,Time, Mean Survival,Times, Mean Survival
D016040 Lung Transplantation The transference of either one or both of the lungs from one human or animal to another. Grafting, Lung,Transplantation, Lung,Graftings, Lung,Lung Grafting,Lung Graftings,Lung Transplantations,Transplantations, Lung
D066027 Transplant Recipients Individuals receiving tissues or organs transferred from another individual of the same or different species, or from within the same individual. Recipient, Transplant,Recipients, Transplant,Transplant Recipient

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