Medical deflectable grinding head

Abstract

The invention relates to a medical deflectable grinding head. The medical deflectable grinding head comprises a deflectable tube assembly, a grinding head assembly, a handle and a transmission assembly; the deflectable tube assembly adopts a stainless steel tube cutting deflection scheme, front-back displacement of an outer tube is converted from screw rotation of the handle, the outer tube and aninner tube are mutually pulled when the outer tube is locked, and rigid support of the grinding head is achieved; by means of proximal incisions formed in the inner tube and the outer tube, two-way deflection of the deflectable tube assembly can be achieved; the transmission assembly is connected with the grinding head so as to achieve rotation of the grinding head through external drive. According to the medical deflectable grinding head, rigid support to the head end is achieved, and a work end of the grinding head has the smaller external diameter, and can pass through a smaller minimallyinvasive channel; by means of an inverted-hook-shaped incision, the phenomena that the incision overbends, and the grinding head is broken are prevented, and the surgical operation accuracy and the surgical safety are improved conveniently; meanwhile, the structure of the handle is improved, and assembling and using of operators are facilitated.

Description

technical field [0001] The invention relates to the technical field of orthopedic surgery medical instruments, in particular to a medical deflectable grinding head. Background technique [0002] In recent years, various bone tissue diseases such as hyperosteogeny, fracture, and osteoarthritis are increasing, and the requirements for bone surgery are also getting higher and higher. In orthopedic surgery, grinding, as a precision machining method, has been widely used to remove bone tissue material. Usually, the grinding head is inserted into the human body and the power handle is used to directly drive the grinding head for grinding. Among them, it is generally difficult to control the grinding position of the grinding head through external force, which leads to low operation efficiency and certain safety hazards. [0003] At present, in order to solve the control of the grinding angle of the grinding head, a mechanical pitching type grinding head has appeared in the prior a...

AI Technical Summary

Problems solved by technology

In orthopedic surgery, grinding, as a precision machining method, has been widely used to remove bone tissue material. Usually, the grinding head is inserted into the human body and the power handle is used to directly drive the grinding head for grinding. In general, it is difficult to control the grinding position of the grinding head through external force, which leads to low operation efficiency and certain safety hazards

[0003] At present, in order to solve the control of the grinding angle of the grinding head, a mechanical pitching type grinding head has appeared in the prior art. For example, Chinese patent CN103767759B discloses a medical grinding tool, which includes a knife tube assembly and is installed on the front end of the knife tube assembly. The grinding head is set in such a way that it can be driven to pitch and rotate. The tail end of the grinding head is hinged to the inner knife tube. The patented front end grinding head adopts a articulated mechanical structure. The grinding head is pitched, so as to realize the control of the grinding position of the grinding head, but because the grinding head end of the medical grinding tool is mechanically articulated, its structure is complex, there are many parts, and many parts need to bear a certain load, which is So that the size of the parts cannot be too small without changing the material strength, which will lead to a larger outer diameter of the working section; in addition, there are gaps in the movement of the mechanical structure, and there are machining errors in the machining, resulting in joint pitching process There are different degrees of shaking, which makes the support of the front grinding head unstable and affects the safety of the operation.

[0004] Although adjustable bendable sleeve structures have appeared in other related technical fields, such as catheter sheaths for sinusitis, which adopt the method of setting incisions to form adjustable bends, its function is only to allow the catheter sheath entering the nasal cavity The device enters the sinus area with a suitable curvature, so as to achieve the correctness of the expansion site, but this type of introducer sheath does not involve grinding operations in orthopedic surgery. The stability of the casing structure is not reliable. If the maximum displacement of a single incision is not limited by long straight cutting, it will cause some incision sections to bend too much when adjusting the bend, and the uncut section will remain relatively small. Transitional bending can lead to irreversible deformation or even fracture of these segments

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