Puncture instrument for positioning center of oval foramen of cranial base
A technology of center positioning and foramen ovale, applied in the field of medical devices, can solve the problems of poor positioning accuracy of the foramen ovale, small adjustment range of the needle direction, long treatment time, etc., so as to make up for the defects of the positioning method, avoid blindness, and improve the The effect of the success rate of the treatment
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[0023] Related data of skull base measured under CT machine:
[0024] A 2mm thin-slice axial scan of the foramen ovale at the base of the skull was performed with spiral CT, and measured on the CT image passing through the foramen ovale figure 1 The distance shown: AB, CD-the distance from the foramen ovale to the proximal body surface, BO, CO-the distance from the foramen ovale to the centerline.
[0025] Calculate the data that needs to be adjusted in the adjustable part of the piercer according to the formula:
[0026] Such as figure 2 , image 3 as shown,
[0027] The plane distance BC between the two foramen ovale and the distance OC between the foramen ovale and the center line
[0028] The distance CD from the foramen ovale to the proximal body surface The inner diameter of the main body frame is set to L
[0029] Screw-in length of the measuring rod MN Width of the fixing threaded ring NP
[0030] Arc radius R of the goniometer Width PQ of the goniometer
[003...
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