Little is known about operating theatre nurses’ (OTNs) main concerns during the perioperative organ donation process. The purpose of this study was to explore OTNs’ experiences of caring for the organ donor during operations where organs are retrieved and to answer the question: what is the main concern during this procedure and how do they deal with it? A total of ten OTNs, one man and nine women with a mean age of 51.8 years (range 38-63 years) were interviewed in this Constructive Grounded Theory study. A core category emerged: Optimum organ retrieval, where the generated grounded theory is present in the four main categories: Brace oneself, Facilitate, Retrieve and Completion. Commitment is the force that binds the OTN to a course of action of relevance for optimum organ retrieval. Respect for and the dignity of the donor are essential.