When the regular panels of trial jurors cannot be furnished to make up panels of the correct number from which to take juries in misdemeanor cases because of the absence of any of such panels, where they, or any part of them, are engaged in the consideration of a case, the presiding judge may cause the panels to be filled by summoning such numbers of persons who are competent jurors as may be necessary to fill the panels. Such panels shall be used as the regular panels are used. The presiding judge shall draw the additional competent and impartial jurors from the jury box of the county and shall order the sheriff to summon them in the event that there are not sufficient jurors.