History Of Ureteral Endoscopy

The first device developed for in-body visualization was Bozzini's Lichtleiter in 1806. It consists of a tube with a mirror and a candle for lighting. It was originally intended for use in the pharynx, but it can also be applied to the pelvic organs. It is worth noting that the original model was made at the American College of Surgeons in Chicago after World War II. It was subsequently returned to the Josephine Museum in Vienna, but a copy remains in Chicago.

Many new designs were introduced in the 19th century, but Desormeaux of Paris (1815-1882) designed one that embodied the characteristics of the male urethra, with the shape of a male urethral instrument. It consists of a long metal channel with a mirror to reflect light from a petroleum-fueled lamp. Like other later designs, it had an angled beak at the tip, and foreshadowed the controversial tip design in ureteroscopes more than a century later. Again, this instrument is not practical because it gets very hot during use. Other designs were introduced to other parts of the world. Wales and Kern in the United States introduced a design that uses reflected light from an ophthalmic mirror to look down the bladder from the central channel. Beak with a sharp Angle again at the tip. It doesn't get hot with use, but visualization is limited. In 1878, in collaboration with the Austrian musical instrument manufacturer Leiter, Nietzsche demonstrated the first working cystoscope. Tungsten wires emit light when energized, but they also generate heat. The endoscope includes a water cooling system. Other future cystoscopes contain many of the same conceptual features in this model.

Electrosurgical Instruments of Rochester, New York, developed the mignon bulb, another major advance. These are low current bulbs small enough to fit on the tip of the cystoscope. Although the bulbs do not cause problems from overheating, they can burn out, which can cause the endoscope to lose power.

After Reinhold Wappler immigrated to New York in 1890, he founded a company that manufactured cystoscopes. The Tilden Brown composite cystoscope has proven to be a practical and durable design. It consists of different lenses or viewing glasses that can look forward at a small Angle or right Angle. An obturator with an inclined tip is initially used to pass through the sheath and then removed for subsequent placement of the lens.

The development of instruments also continues in Europe. The catheter cystoscope was designed by Leopold Casper, a German. Although it uses a mirror system between the eyepiece and the shaft, it does allow ureter intubation, but the catheter does not deflect. Albarran describes the next instrument that can deflect the ureteral catheter. It is a purely mechanical device that can be used with the viewer and sheath of other endoscopes. It is still in use and production today.

Major improvements in cystoscope design date back to 1910, when the Burger in New York was based on Tilden Brown's design. It is called Brown-Buerger cystoscope and has been in use for more than half a century (Figure 1.1). It includes interchangeable viewing mirrors and channels for perfusion and instrumentation, and can accept Albarran deflectors. The imaging system consists of multiple thin lenses (similar to magnifying glasses or optical lenses) arranged on a cylindrical axis.