Davis interlocking sound

Da·vis in·ter·lock·ing sound

(dā'vĭs),
a sound comprised of two instruments with curved male and female tips, used to introduce a catheter into the bladder in the treatment of ruptured urethra; the male sound is introduced into the distal urethra via the meatus and the female sound is passed downward through the bladder neck into the proximal urethra via an open cystotomy; the ends of the two instruments are engaged, with the female sound guiding the male sound upward into the bladder; a catheter is then sutured to the tip of the male sound and withdrawn through the urethra to restore continuity of its lumen.
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