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Dimension measurement tool for structure in joint and with virtual rotation center

A technology of structure size and measurement tools, applied in the directions of diagnostic recording/measurement, medical science, sensors, etc., can solve the problems of slow progress in the research of the intercondylar fossa, lack of accurate tools, and great influence of the shooting position, so as to achieve the measurement method. Flexibility, pain relief, small size effect

Inactive Publication Date: 2014-12-03
PEKING UNIV THIRD HOSPITAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Dimension measurement tool for structure in joint and with virtual rotation center
  • Dimension measurement tool for structure in joint and with virtual rotation center
  • Dimension measurement tool for structure in joint and with virtual rotation center

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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 measurement tool for intra-articular structure size with virtual rotation center used in minimally invasive surgery. The measurement tool includes a right part assembly 1, a left part assembly 2, an arc-shaped track 3, and a right handle. 5 and left handle 6. The right part assembly 1 and the left part assembly 2 are connected by an arc-shaped rail 3 to form a scissors configuration, the right handle 5 is connected to the right part assembly 1, and the left handle 6 is connected to the left part assembly 2.

[0050] Left handle 6

[0051] See figure 1 , Figure 1A , Figure 1B , Figure 1C , Figure 5 , Image 6 As shown, the left handle 6 has a rectangular structure. An A groove 6A is provided on a plate surface of the left handle 6, and an AA threaded hole 6B is...

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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 present invention relates to a measuring instrument for medical use, and more particularly, to a measuring tool with a virtual center of rotation for intra-articular structure size in a minimally invasive environment. Background technique [0002] The knee joint is the human body’s largest, most complex structure and function of the trochlear joint. It consists of bone, articular cartilage, soft tissues (crucius ligaments, meniscus), synovial fluid in the joint cavity, attached to the joint capsule, and extra-articular The ligaments are strengthened and formed. The incidence of knee joint injury is relatively high, ranking first among all joint injuries in the human body. In clinical practice, injuries to cruciate ligaments, meniscus and articular cartilage are the most common. Therefore, the anatomy, imaging and clinical research of the knee joint have received more and more attention in recent years. [0003] The anterior cruciate ligament (ACL) is th...

Claims

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Application Information

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Patent Type & Authority Applications(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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