CN201067403Y - Locator for optical surgery navigation system - Google Patents

Abstract

The utility model relates to a device for assisting medical operation by using a computer, in particular to a positioner of an operation navigation system based on an optical positioning device, which comprises a positioning rigid body (3) with a cross structure; the four end points of the positioning rigid body (3) are respectively fixed with a reflective ball (1) through connecting studs (2). The utility model discloses a locator for optical surgery navigation has small and exquisite nimble, maneuverability is strong, the reliability is high, low cost's characteristics, can satisfy clinician's operation requirement. The doctor selects proper surgical instruments according to the surgical navigation system software, and the surgical instruments are connected with the positioners through the connecting pieces. After the instruments are registered and registered, the surgical navigation system can identify the surgical instruments with different locators, and the front positions, namely the space coordinates, of the instruments are displayed on a display of the surgical navigation system in real time, so that the multiple instruments can be tracked under the same surgical navigation system at the same time.

Description

A locator for optical surgery navigation system

technical field

The utility model relates to a device for assisting medical operations by using a computer, in particular to a locator for an operation navigation system based on an optical locating device.

Background technique

At present, the surgical navigation system most used clinically is the surgical navigation system based on optical positioning devices, most of which are produced by Canadian NDI company. The principle of device tracking is: a binocular position sensor can emit infrared light, and the infrared light is irradiated on the surgical instrument equipped with a locator. 1) A small ball that can reflect infrared light. The small ball will reflect the infrared light back to the position sensor. The position sensor can calculate the spatial position of the tip of the current surgical instrument after being processed by the system software, and then realize the real-time monitoring of the surgical instrument within the scope of the surgical field. track.

From the above-mentioned optical positioning principle, it can be seen that the locator is the main component to realize the tracking of instruments, and it is also the key link to determine the accuracy of the surgical navigation system, especially to realize the simultaneous tracking of multiple instruments under the same optical positioning device, so that There are higher requirements for space size and geometric shape, and the utility model is proposed and realized under such requirements. When one surgical instrument is used, the design of the locator is not difficult; when there are two instruments, the size and shape of the positioning rigid body of the second instrument must be distinguished from the first positioning rigid body to achieve simultaneous tracking. When there are Nth (N>3) instruments to be used under the same optical positioning device, its size and shape will be different from the positioners of the previous N-1 instruments, that is, the size and shape are different. If the locator is designed manually, the difficulty can be imagined. At the same time, the space structure and weight of the locator, process performance, dimensional stability, etc. are also factors to be considered in the design to ensure that doctors can use surgical navigation. System flexibility, safety and reliability.

Contents of the invention

The utility model is based on the positioning principle of the optical system, aims at realizing the simultaneous tracking of multiple instruments under the same optical positioning device, and designs a compact, flexible and highly operable device with the mutual difference between each positioner as the design criterion. , high reliability, low cost, and a surgical positioner that can meet the requirements of clinicians.

In order to achieve the purpose of the present invention, the utility model designs a positioner for an optical surgical navigation system, which includes a positioning rigid body with a cross structure, and four endpoints of the positioning rigid body are respectively fixed with reflective balls through connecting studs.

The utility model is used for the locator of the optical surgery navigation system, and its further improvement is that the middle part of the positioning rigid body is provided with a process hole for connection and assembly; the positioning rigid body is also provided with a registration taper hole for registration and identification of the positioning sensor; and The top end of the connecting stud is set radially as a cylindrical surface that can be transitionally matched with the bottom hole of the reflective ball, and the bottom end is set as a threaded screw rod, and a limiting plane is provided to ensure accurate connection with the positioning rigid body.

The utility model is compact and flexible, has strong operability, high reliability and low cost, and can meet the use requirements of clinicians.

Description of drawings

Fig. 1 is the assembling schematic diagram of the utility model locator;

Fig. 2 is the structural representation of connecting stud;

The figure includes: reflective ball (1) connecting stud (2) positioning rigid body (3) tapered hole for registration (4) process hole for connection and assembly (5)

Detailed ways

Referring to Fig. 1 and Fig. 2, the locator of the present invention includes a positioning rigid body 3 with a cross structure, and reflective balls 1 fixed by connecting studs 2 at the four ends of the positioning rigid body 3 respectively. In the middle of the positioning rigid body 3, a process hole 5 for connecting and assembling is provided. The positioning rigid body is also provided with a registration tapered hole 4 for registration and recognition of the positioning sensor. The top end of the connecting stud 2 is arranged radially as a cylindrical surface that can be transitionally matched with the bottom hole of the reflective ball, and its bottom end is set as a threaded screw rod, and a limit plane is provided to ensure accurate alignment with the positioning rigid body 3 connect.

The locator of the present invention includes two aspects of software and hardware. First, according to the requirements of the geometric dimensions of the locator when the optical positioning device recognizes multiple instruments, a set of geometric dimension data of the locator can be generated with the compiled positioning rigid body generation software. Before the generation, the linear and angular parameters of the positioning rigid body can be performed. set up. The positioning rigid body made according to this set of data has mutual heterogeneity. While ensuring its use function, it avoids the error that may be caused by artificial calculation and improves the work efficiency; The positioning rigid body is made by oxidation coloring treatment to ensure the dimensional stability and rigidity of the positioner; finally, the reflective ball is assembled on the positioner through stainless steel connecting studs.

In order to ensure the dimensional stability of the locator and the accuracy after assembly, the present invention performs aging treatment on the aluminum alloy material to eliminate internal stress and avoid deformation after processing; during processing, one positioning is used to process four position holes for reflective balls to ensure Hole position and flatness. In order to ensure the flexibility and convenience of its use and not occupy the doctor's operating space, the utility model has also designed a positioning hole and an assembly hole for connecting with the connector (the connector connecting the surgical instrument and the locator). In order to improve the strength of the locator and reduce the influence of the surface reflection of the positioning rigid body on the position sensor, the utility model carries out oxidation and coloring treatment on the processed locator. At the same time, each locator is also designed with a registration taper hole to facilitate the registration and identification of the position sensor.

The connecting stud is also an important part to ensure the effectiveness of the locator. The radial top end is a cylindrical surface that can be transitionally matched with the bottom hole of the reflective ball, and the bottom end is a threaded screw with a limited plane, which can ensure the positioning of the rigid body. Connect accurately.

Example 1

Use the compiled positioning rigid body generation software to generate a set of geometric dimension data of the locator, use this set of data to draw engineering drawings, and process the positioning rigid body 3. Then tighten the processed stainless steel connecting studs 2 at the four end points of the positioning rigid body 3, and make the tolerance of the upper end faces of the four connecting studs in the axial height not greater than 0.03mm. Then, install the reflective ball 1 that can emit infrared light on the upper end of the connecting stud 2, and press it in manually. Finally, the locator is connected with the surgical instrument through a special connecting piece, ready for use. To realize the simultaneous use of multiple instruments, it is only necessary to use different positioning rigid bodies on different surgical instruments.

According to the surgical navigation system software, the doctor makes a surgical plan, determines the surgical path, selects the appropriate surgical instruments, and then connects these instruments to each locator through the connecting piece. After such instruments are successfully registered and registered, the surgical navigation system can recognize surgical instruments equipped with different locators, and display the front-end position of the instrument in real time on the display of the surgical navigation system, that is, the spatial coordinates, thereby realizing multiple instrumentation. Simultaneous tracking under the same surgical navigation system.

Claims (4)

1. a localizer that is used for the optical operation navigation system is characterized in that, comprises the location rigid body (3) of cross structure, and four end points of described location rigid body (3) are fixed with witch ball (1) by connecting double-screw bolt (2) respectively.

2. according to the described localizer that is used for the optical operation navigation system of claim 1, it is characterized in that the middle part of described location rigid body (3) has been provided with the fabrication hole (5) of connection and assembling effect.

3. according to claim 1 or the 2 described localizers that are used for the optical operation navigation system, it is characterized in that described location rigid body (3) is provided with the registration taper hole (4) that is used for alignment sensor registration identification.

4. according to the described localizer that is used for the optical operation navigation system of claim 3, it is characterized in that, the top of described connection double-screw bolt (2) radially be set to can with the cylinder of witch ball bottom outlet interference fits, its bottom is set to screwed screw mandrel, and is provided with spacing plane and is used for guaranteeing accurate connection the with described location rigid body (3).

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