Percutaneous nephroscope with independent curved instrument channel

Abstract

The invention relates to a percutaneous nephroscope with an independent curved instrument channel, and belongs to the technical field of medical instruments. The nephroscope comprises a hard body anda holding portion. The hard body is a linear body provided with a water channel and an optical developing system. An instrument channel is arranged in the water channel, the front end of the instrument channel is a curved end, the end of the optical developing system is provided with a lens, and the plane of the lens is inclined relative to the radial plane of the hard body, and the rear end of the hard body is connected with the holding portion used for holding and providing a channel. The percutaneous nephroscope increases the view direction angle of the lens and is provided with the independent instrument channel with the curved front end. When the complex calculus like parallel calculus is treated clinically, the percutaneous nephroscope can be used for assisting the traditional rigidendoscope to conduct holmium laser lithotrity under direct vision without an additional puncture channel. Damage to the kidney tissues caused by multiple puncture is reduced, the lithotripsy efficiency is improved, the residual calculus is reduced, and the lithotripsy effect of phase I percutaneous nephrolithotomy is improved.

Description

technical field [0001] The invention relates to a percutaneous nephroscope with an independent curved instrument channel, which belongs to the technical field of medical instruments. Background technique [0002] Percutaneous nephroscopy is a common method for clinical treatment of staghorn calculi, calices or diverticulum calculi. The operator first establishes a puncture channel through the skin of the lower back under the guidance of B-ultrasound or X-ray, and then inserts the transdermal nephroscopy through the expanded channel. Percutaneous nephroscopic surgery uses ultrasound, laser and other technologies to carry out lithotripsy. For patients with solitary renal pelvis stones with moderate or greater hydrops, percutaneous nephroscopic surgery has the advantages of small wound, short time, and good lithotripsy effect. When dealing with calculi in parallel calyxes or other calculus in dead corners, since the viewing angle of the end of the traditional hardscape lens is ...

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Problems solved by technology

[0002] Percutaneous nephroscopy is a common method for clinical treatment of staghorn calculi, calices or diverticulum calculi. The operator first establishes a puncture channel through the skin of the lower back under the guidance of B-ultrasound or X-ray, and then inserts the transdermal nephroscopy through the expanded channel. Percutaneous nephroscopic surgery uses ultrasound, laser and other technologies to carry out lithotripsy. For patients with solitary renal pelvis stones with moderate or greater hydrops, percutaneous nephroscopic surgery has the advantages of small wound, short time, and good lithotripsy effect. When dealing with calculi in parallel calyxes or other calculus in dead corners, since the viewing angle of the end of the traditional hardscape lens is generally 12 degrees, the viewing range is limited, which may make it difficult to find the calculi, and the instrument channel is integrated with the water channel, even if the calculus is in a safe place. Within the scope of vision, because the laser fiber cannot be bent by itself, it is still impossible to aim at the lithotripsy. If the angle of the lens is changed forcibly or the puncture channel is increased, it will cause damage to the kidney tissue, prolong the operation time, and increase the chance of complications such as channel bleeding.

Percutaneous nephroscopy combined with flexible ureteroscopy is currently an effective means of dealing with complex stones. However, due to the limitation of the bending radius of the flexible ureteroscope, for some patients with lower renal calyceal stones and calices neck stenosis, the effect of lithotripsy is still unsatisfactory. Increased operation time and difficulty

[0003] The Chinese patent document (publication number CN103622661A) discloses a rigid percutaneous nephroscope with a bendable front end. The front end is designed as a curved instrument channel. There will be a bending radius, which will increase the difficulty of the operation. It is not practical in percutaneous nephroscopic surgery, especially when the hydronephrosis is not obvious and the neck of the calices is narrow. The complexity of the anatomical structure of the renal collecting system determines the straight line The mirror body is the best choice for percutaneous nephroscopic surgery, but the linear mirror body still has many shortcomings mentioned above

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