Urological endoscope particularly resectoscope

A urological endoscope, comprising, in combination, a hollow cylindrical sheath having a proximal end and a distal end;

• said sheath comprising a beak at its distal end;
• optical viewing means in said sheath extending from said distal end back towards said proximal end;
• a removable outflow tube slidable onto the sheath to surround said sheath and form together with said sheath an intermediate return-flow space between the outer wall of said sheath and the inner wall of said outflow tube, said outflow tube when in position over said sheath tightly surrounding said distal end of said sheath;
• means for introducing clear rinsing water into the proximal end of said sheath, and means for withdrawing turbid water from the proximal end of said intermediate space, said outflow tube being provided with apertures at the distal end thereof, said apertures being located distally of the distal end of said optical viewing means by proximally of the distal end of said outflow tube so that said apertures open directly into said intermediate space for the flow of clear rinsing water out of the distal end of said sheath and around the end of the endoscope and then through said apertures directly into said intermediate space, wherein said sheath is provided with an end beak at said distal end, and wherein the distal end portion of said outflow tube terminates rearwardly of said beak, wherein said distal end of said sheath is of enlarged diameter, and wherein said beak is an insert received within the enlarged distal end portion of said sheath.

A urological endoscope, comprising, in combination, a hollow cylindrical sheath having a proximal end and a distal end;

• said sheath comprising a beak at its distal end;
• optical viewing means in said sheath extending from said distal end back towards said proximal end;
• a removable outflow tube slidable onto the sheath to surround said sheath and form together with said sheath an intermediate return-flow space between the outer wall of said sheath and the inner wall of said outflow tube, said outflow tube when in position over said sheath tightly surrounding said distal end of said sheath;
• means for introducing clear rinsing water into the proximal end of said sheath;
• and means for withdrawing turbid water from the proximal end of said intermediate space, said outflow tube being provided with apertures at the distal end thereof, said apertures being located distally of the distal end of said optical viewing means but proximally of the distal end of said outflow tube so that said apertures open directly into said intermediate space for the flow of clear rinsing water out of the distal end of said sheath and around the end of the endoscope and then through said apertures directly into said intermediate space, wherein said distal end of said outflow tube extends to the distal end of said sheath, and wherein said distal end portion of said outflow tube is provided with an outwardly projecting hollow ridge provided on its flanks with said apertures, whereby if the wall of the urethra tightly surrounds the distal end of the endoscope the outwardly projecting hollow ridge will distend a portion of the urethra creating clear space adjoining said flanks and establishing access into said apertures for turbid rinsing water.

A urological endoscope, comprising, in combination, a hollow cylindrical sheath having a proximal end and a distal end, said sheath comprising a beak at its distal end;

• optical viewing means in said sheath extending from said distal end back towards said proximal end;
• a removable slide-on outflow tube slidable onto the sheath to surround said sheath and forming together with said sheath, when slid into place around said sheath, an intermediate return-flow space between the outer wall of said sheath and the inner wall of said slide-on outflow tube, said outflow tube when in position over said sheath tightly surrounding said distal end of said sheath;
• means for introducing clear rinsing water into the proximal end of said sheath;
• and means for withdrawing turbid water from the proximal end of said intermediate space, said outflow tube being provided with apertures at the distal end thereof, said apertures opening directly into said intermediate space for the flow of clear rinsing water out of the distal end of said sheath and around the end of the endoscope and then through said apertures directly into said intermediate space.