Resectoscope and sealing structure thereof

Abstract

The invention relates to a resectoscope and a sealing structure thereof. The resectoscope comprises an outer sheath, an inner sheath, a handle assembly, an endoscope, an electrode assembly and a flushing assembly, wherein the outer sheath is arranged outside the inner sheath in a sleeving manner, the rear end of the inner sheath is connected to the handle assembly, the endoscope and the electrodeassembly penetrate through the inner sheath, the rear end of the electrode assembly is connected to the handle assembly, and the flushing assembly is installed on the outer sheath. The resectoscope further comprises a sealing piece, wherein the sealing piece is installed at the joint of the inner sheath and the handle assembly, and the sealing piece is provided with an endoscope hole through whichthe endoscope can penetrate and a rod hole through which the electrode assembly can penetrate; a cutting groove is further formed in the sealing piece and communicates with the rod hole and the edgeof the sealing piece. According to the resectoscope and the sealing structure thereof, the sealing piece can simultaneously seal the endoscope and the electrode assembly, so that flushing fluid is prevented from permeating into the handle assembly and the electrode assembly on the other side of the sealing piece; the electrode assembly can be clamped into the rod hole from the cutting groove through the cutting groove, and thus installation and replacement are more convenient; and due to the cutting groove, the sealing piece is easier to deform, so that the electrode assembly and the sealing piece are pushed and pulled more smoothly.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a resectoscope and its sealing structure. Background technique [0002] With the development of modern medical technology, it has become a very common medical technology to use electrocution to go deep into the patient's body for examination and operation. Resectoscopes are commonly used in minimally invasive surgical procedures in urology, such as benign prostatic hyperplasia. Generally, the resectoscope needs to be performed in an electrolyte environment. The cutting electrode is inserted into the working guide groove through the natural body hole and enters the cavity. After the cutting electrode is activated, plasma is generated to vaporize or coagulate the tissue. [0003] see Figure 1 ~ Figure 2 , the resectoscope usually includes an outer sheath 1, an inner sheath 2, a handle assembly 3, an endoscope 4 and an electrode assembly 5, the outer sheath 1 is set ou...

AI Technical Summary

Problems solved by technology

[0005] Such a sealing structure is relatively simple, and it is only sealed against the electrodes. There is no sealing structure for the contact part of the endoscope 4 and the handle assembly 3. After long-term use, it is easy to wear between the endoscope 4 and the handle assembly 3, making the seal Performance decline; and after the sealing plug 10 is set on the electrode, due to the structure at both ends of the electrode assembly 5, the electric cutting ring and the terminal post make the sealing plug 10 difficult to remove and replace. The aging and wear of the plug 10 will also affect the sealing effect

[0006] In addition, during the manufacturing process of the sealing plug 10, due to the influence of factors such as processing or measurement, there is always a certain error between the actual size and the standard size after completion.

If the size of the sealing plug 10 is too small, the distance between the sealing plug 10 and the electrode assembly 5 is too tight, and the friction force is too large, and it will be difficult to push and pull the electrode assembly 5 back and forth. For very high-precision operations, it is difficult for the doctor to control Finger strength, serious and even misuse, damage other human tissues and affect the efficiency of surgery

[0007] Some sealing plugs are often coated with a layer of lubricating oil when leaving the factory to alleviate the problem of unsmooth push and pull

But this is only a palliative, not a permanent solution. After using for a period of time, the mixed oil will dry up, and there will be problems of unsmoothness.

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