Sen. Rand Paul (R-Ky.), who was unable to leave the Senate floor during his nearly 13-hour filibuster on Wednesday, joked Thursday that he considered using a catheter to avoid the need to use the bathroom.

"Well, see, the thing is I did think about it," Paul, who is a doctor of ophthalmology, told conservative commentator Glenn Beck on Thursday morning. "I've put them in before, and I really decided against it."

Paul, who phoned in to the interview, appeared to chuckle after his comment. Paul's office told Post Politics that Paul was, in fact, joking.Sen. Strom Thurmond (D-S.C.), before his 24-hour filibuster against the 1957 Civil Rights Act, reportedly took a steam bath to rid his body of excess fluids and reduce the need to use the bathroom. Paul's office told Post Politics that he did nothing of the sort.

Paul concluded his filibuster by alluding to the fact that he needed to use the bathroom.

“I would go for another 12 hours to try to break Strom Thurmond’s record, but I’ve discovered that there are some limits to filibustering and I’m going to have to go take care of one of those in a few minutes here,” Paul said.

Senate Majority Leader Harry Reid (D-Nev.) also alluded to Paul's long spell without a bathroom break during remarks on the Senate floor Thursday morning.

“One thing I learned from my own experience with talking filibusters: to succeed, you need strong convictions but also a strong bladder. Senator Paul has both,” Reid said.

Paul also told Beck that most of the senators who showed up did it on their own and that his office only coordinated with a couple of them.

"And then really most of the senators came spontaneously too," Paul said. "We called one or two that do a lot with us to help us early on and then -- but gradually, I'm not sure how many we had, but I'll bet you we had 15 finally show up to be supportive."