# Potential for organ donation after controlled circulatory death: a retrospective analysis

## TL;DR

This study estimates the potential increase in organ donation in Portugal by implementing controlled circulatory death donation.

## Contribution

The study provides a retrospective analysis of controlled circulatory death donation potential in a Portuguese hospital.

## Key findings

- 10 patients were potentially eligible for controlled circulatory death donation in 2019.
- A 21% increase in yearly transplantation activity is anticipated, mainly impacting kidney transplants.
- Insufficient clinical records and delays in withdrawal of life-sustaining measures limit donation potential.

## Abstract

Despite the discrepancy between demand and availability of organs for transplantation, controlled circulatory death donation has not been implemented in Portugal. This study aimed to estimate the potential increase in organ donation from implementing such a program.

All deceased patients within the intensive care medicine department at Centro Hospitalar Universitário de São João, throughout the year 2019, were subjected to retrospective analysis. Potential gain was estimated comparing the results with the number of donors and organs collected during the same period at this hospital center. Differences in variables between groups were assessed using t tests for independent samples or Mann–Whitney U tests for continuous variables, and chi-squared tests were used for categorical variables.

During 2019, 152 deaths occurred after withdrawal of life-sustaining therapies, 10 of which would have been potentially eligible for donation after controlled circulatory death. We can anticipate a potential increase of 10 prospective donors, a maximum 21% growth in yearly transplantation activity, with a greater impact on kidney transplantation. For most patients, the time between withdrawal of organ support and death surpassed 120 minutes, an outcome explained by variations in withdrawal of life-sustaining measures and insufficient clinical records, underestimating the potential for controlled circulatory arrest donation.

This study effectively highlights public health benefits of controlled circulatory arrest donation. Legislation allowing donation through this method represents a social gain and enables patients who will never meet brain death criteria to donate organs as part of the end-of-life process in intensive care medicine, within a framework of complete ethical alignment.