Surgical instruments specially designed to be inserted through a fistula are called fistula probes.
Fistula probes available at Surtex Instruments are surgical tools manufactured to exceed industry standards. Available with Surtex Instruments are the Lockhart-Mummery Fistula Probe, in four different varieties depending of the curvature angle, and Pratt Fistula Probe.
The Lockhart-Mummery Fistula probe found its application in anal fistula treatment.
Pratt Fistula Probe is used in rectal and anal surgery. Its crypt hook aids in hemorrhoid ligation and removal of O-rings.