Those of you who were riveted to the Senate’s debate of redistricting Thursday may have wondered where the lieutenant governor was.

Lt. Gov. Bill Bolling (R), who presides over the Senate, was unmistakably absent, leaving Sen. Charles J. Colgan (D-Prince William), president pro tempore of the Senate, in his place.

Bolling was undergoing a “routine medical procedure,” which had been planned for several weeks, according to his spokeswoman Ibbie Hedrick said.

Hedrick declined to say whether the “procedure” was surgery or release any further information.

He will be absent Friday and resume his public schedule on Saturday, April 30.

The last time Bolling missed a day presiding over the Senate was when he was stranded in Italy last year because ash from an Icelandic volcano crippled air traffic across much of Europe.