Doctors treating the former president stated they blocked the right phrenic nerve and have scheduled a follow-up procedure within 48 hours to address the left phrenic nerve. The phrenic nerve, according to medical literature, is a critical nerve originating in the neck that controls the diaphragm, the primary muscle used in breathing.

Bolsonaro is currently imprisoned, serving a 27-year sentence after being convicted in September for plotting a coup to overturn his 2022 election loss. The conviction stems from allegations that Bolsonaro attempted to subvert the democratic process following his defeat to current President Luiz Inácio Lula da Silva.

The former president's health has been a recurring point of attention since he left office. He has been hospitalized on multiple occasions for various ailments, including complications related to a stabbing he suffered during his 2018 presidential campaign. These health issues have, at times, intersected with the ongoing legal proceedings against him.

The timing of the procedure coincides with Bolsonaro's ongoing imprisonment, raising questions about the conditions of his detention and access to medical care. While details regarding the specific location of the procedure have not been released, it is understood that Bolsonaro is receiving treatment outside of the prison facility. The next steps involve monitoring Bolsonaro's response to the initial nerve block and proceeding with the scheduled procedure on the left phrenic nerve.