The Houston Chronicle has a good article on Al Green
https://www.houstonchronicle.com/politics/texas/article/al-green-mayorkas-houston-18653317.php
Republicans had expected Green, who has been in the hospital since an emergency surgery Friday, to miss the vote. But he returned to the floor in a wheelchair and hospital scrubs for the dramatic final moments of the vote.....
Green said he went to the hospital last week after he started experiencing stomach pains. The House's attending physician told him he needed to go to the emergency room, where X-rays found he had a blocked intestine. He had surgery Friday and is still in the hospital recovering.....
Green said there was no strategy involved and that Democratic Leader Hakeem Jeffries was surprised when he called to let him know he planned to make it for the vote. Green said he was watching the news Tuesday and that was when he found out the vote was planned for that evening. He made arrangements with the hospital to allow him to travel to the Hill and rested in a bed in the attending physician's office until the Mayorkas vote came up. Green said he didn't want to come to the floor for earlier votes because it would cause a spectacle.
Green said the vote was important because Mayorkas has helped with multiple cases in which his constituents had immigration issues. In one case last year, Green said, an undocumented child needed emergency dialysis and Mayorkas helped speed up parole so he could receive the treatment from Texas Children's Hospital.