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A Measuring Tool for Intra-articular Structure Dimensions with Virtual Center of Rotation

A technology of structural size and measurement tools, applied in the directions of diagnostic recording/measurement, medical science, sensors, etc., can solve the problems of large influence of shooting position, sluggish progress of intercondylar fossa research, lack of accurate tools, etc., to achieve a small volume , the measurement method is flexible, the effect of reducing pain

Inactive Publication Date: 2015-12-30
PEKING UNIV THIRD HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the irregular shape of the intercondylar notch, the results of imaging examinations such as X-ray films, CT and MRI are greatly affected by the shooting position, and there is a lack of precise tools for direct measurement under arthroscopy. Therefore, the research progress of the intercondylar notch has been lagging behind

Method used

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  • A Measuring Tool for Intra-articular Structure Dimensions with Virtual Center of Rotation
  • A Measuring Tool for Intra-articular Structure Dimensions with Virtual Center of Rotation
  • A Measuring Tool for Intra-articular Structure Dimensions with Virtual Center of Rotation

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Embodiment Construction

[0048] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0049] see figure 1 , Figure 1A , Figure 1B , Figure 1C As shown, the present invention designs a tool for measuring the size of intra-articular structures with a virtual center of rotation for use in minimally invasive surgery. The measuring tool includes a right part assembly 1, a left part assembly 2, an arc track 3, and a right handle 5 and the left handle 6. The right part assembly 1 and the left part assembly 2 are connected into a scissors configuration through the arc track 3, the right handle 5 is connected on the right part assembly 1, and the left handle 6 is connected on the left part assembly 2.

[0050] left handle 6

[0051] see figure 1 , Figure 1A , Figure 1B , Figure 1C , Figure 5 , Figure 6 As shown, the left handle 6 is a rectangular structure. A surface of the left handle 6 is provided with an A groove 6A, and the A gr...

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Abstract

The invention discloses a dimension measurement tool for structure in a joint and with a virtual rotation center. The dimension measurement tool for the structure in the joint and with the virtual rotation center comprises a right component, a left component, an arc rail, a right handle and a left handle, wherein the right component and the left component are connected into a scissor structure through the arc rail, the right handle is connected with the right component, and the left handle is connected with the left component. Tow patulous measurement tips are used to perform cross obstacle measurement on the dimension of the structure in the joint. The virtual rotation center of the dimension measurement tool can guarantee that the diameter of the measurement tips at an incision position of the joint is the minimum, and thereby reduces pain of patients, and improves operation measuring safety. According to the dimension measurement tool for the structure in the joint and with the virtual rotation center, a measurement range is enlarged through a measurement mode of crossing a left slide rod and a right slide rod, the distance between the tips of the left slide rod and the right slide rod can be accurately figured out by using the arc rail and readings of a left slide rail and a right slide rail, and the distance figured out is the structure dimension of a measured object in the joint.

Description

technical field [0001] The invention relates to a measuring instrument for medical use, more particularly, a measuring tool with a virtual center of rotation, which is used for measuring the structural dimensions in a joint in a minimally invasive environment. Background technique [0002] The knee joint is the largest trochlear joint with the most complex structure and function in the human body. Formed by strengthening ligaments. The incidence of knee joint injury is relatively high, ranking first among all joint injuries in the human body, and the injuries of cruciate ligament, meniscus and articular cartilage are the most common clinically. Therefore, more and more attention has been paid to the anatomical, imaging and clinical studies of the knee joint in recent years. [0003] The anterior cruciate ligament (ACL) is the most important forward stabilizing structure of the knee joint. After injury, it can produce obvious forward instability of the knee joint, which ser...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/107
Inventor 敖英芳王成裴旭陈文庆
Owner PEKING UNIV THIRD HOSPITAL
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