A high-pressure perfusion surgical endoscope with a special-shaped outer working tube

Abstract

The invention relates to a high-pressure-perfusion surgical endoscope with a special-shaped outer working tube. The high-pressure-perfusion surgical endoscope comprises an outer sheath tube assembly and an endoscope assembly, the outer sheath tube assembly comprises a working sleeve and a fixing handle, and the tail end of the working sleeve is embedded into the fixing handle and fixed; the endoscope assembly comprises an outer working tube and a mirror body, the outer working tube is connected with the mirror body to form a whole, a mechanical channel, a water inlet channel, an imaging channel and a lighting channel are integrated in the outer working tube, and a water outlet channel is form in the gas between the outer working tube of the endoscope assembly and the working sleeve of theouter sheath tube assembly. According to the surgical endoscope, the outer working tube is specially designed, a larger diameter of themechanical channel of the endoscope, a larger diameter of the water inlet channel, a larger size of a surgical device access channel and a larger size of a lighting light channel can be obtained, and the water outlet channel is not prone to being blocked by blood blocks.

Description

technical field [0001] The invention relates to a medical instrument, in particular to a high-pressure perfusion surgical endoscope with a special-shaped outer working tube, which can be used for surgical diagnosis and treatment observation. Background technique [0002] In recent years, with the development and popularization of minimally invasive surgery, surgical endoscope systems have been widely used in the fields of orthopedics, spine surgery, gynecology, urology, and neurosurgery; surgical endoscopes usually have built-in instrument channels , the eyepiece is designed with an oblique angle, which is convenient for the use of thick and powerful surgical instruments. In order to ensure a clear view during the operation, the outer working tube integrates a water channel, an illumination light channel, an imaging channel and an instrument channel; the illumination light channel is usually composed of a beam of light Composed, so that the illumination light generated by th...

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Problems solved by technology

The advantage of this design is that the nesting gap between the oval outer working tube and the circular outer sheath constitutes the water outlet channel of this endoscope, and the water flow rate of the water outlet channel in this design is 4-5 times that of the water inlet channel. The outlet channel is large, so it is not easy to be blocked by blood clots; the disadvantage is that the cross-section of the outer working tube is designed to be elliptical, compared with the circular outer working tube of the same length, its cross-sectional area of ​​the water inlet channel is smaller, and the water flow rate is small. Perfusion Due to the small inner diameter of the water inlet channel, the flow is insufficient and affects the clarity of the field of vision. Therefore, a high-pressure perfusion pump must be used for pressurized perfusion to ensure the water flow and the clarity of the surgical field of view.

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