| tractor | 1. That which draws, or is used for drawing. 2. <medicine> Two small, pointed rods of metal, formerly used in the treatment called Perkinism. Origin: NL, from L. Trahere, tractum, to draw. Source: Websters Dictionary (01 Mar 1998) |
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| tractory | <geometry> A tractrix. Origin: L. Tractorius of drawing, fr. Trahere, tractum, to draw. Source: Websters Dictionary (01 Mar 1998) |
| Syms tractor | A collapsible rubber bag attached to the extremity of a tube; the tube is introduced into the bladder through the perineal wound and the bag is inflated; traction produced draws the enlarged prostate into the wound where it is more accessible. (05 Mar 2000) |
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| Young prostatic tractor | A short, straight tubular instrument with blades at its tip, which can be rotated open and closed; it is passed into the prostatic urethra, through a prostatotomy incision made during the later stages of open perineal prostatectomy, with its tip into the bladder; direct traction on the instrument brings the prostate gland down into the operative field where enucleation can be more easily performed. (05 Mar 2000) |
| Lowsley tractor | A slender curved instrument with flexible blades at its tip, which can be opened or closed by rotation at the proximal end of the tractor; it is passed per urethram into the bladder and used to retract the prostate gland downward into the operative field in the initial stages of perineal prostatectomy. (05 Mar 2000) |