mayfield head frame double nail fixed position precise locator

Abstract

The invention discloses a Mayfield head frame double-nail fixed position precise locator, including a locator body, the locator body includes an arc surface, and the arc surface is the same shape and size as the inner arc surface of the rocker arm on the double-nail side of the Mayfield head frame. The curved surface is provided with a central positioning rod and two skull nail positioning rods. The front ends of the central positioning rod and the skull nail positioning rods have marking devices. Position, the axial direction of the skull nail positioning rod is the same as that of the skull nail, the two skull nail positioning rods are symmetrical to the axis of the central positioning rod, and the front ends of the central positioning rod and the skull nail positioning rod are located on the inner side of the arc. The present invention can increase the accuracy, reliability and convenience of positioning. The center positioning rod is inserted into the skin 2.5cm above the back of the auricle, and the previous "virtual point" becomes an intuitive positioning point, and the center point can be determined intuitively and accurately. , it is convenient to observe whether the center point is level with the side of the single nail.

Description

technical field [0001] The invention relates to a medical device, in particular to a Mayfield head frame double-nail fixed position precise locator. Background technique [0002] The head frame system is often used in orthopedics or neurosurgery to maintain the head and neck surgical position and adjust the axis and posture during the operation. Mayfield head frame is a common head frame fixation system in clinical practice. When the prone position is placed, the Mayfield head frame is required to fix the position of the head and then stabilize the head in the air. How to reliably and stably fix the patient's head to maintain the normal axis of the spine, provide the best surgical field of view for the operator, and ensure the safety and smooth progress of the operation has become one of the key issues in this position. The Mayfield head frame has the advantages of convenient adjustment of the position of the cervical spine, avoidance of facial skin pressure injury, easy o...

AI Technical Summary

Problems solved by technology

[0005] 1. In clinical practice, it is found that the entry point of the single-nail side is easy to determine, while the positioning of the entry point of the double-nail side is more difficult, and it is often selected by the operator's naked eyes and experience, especially for young doctors who lack experience. Considering the single-pin lateral fixation, the double-top lateral fixation is neglected, which leads to the anterior or posterior position of the bilateral fixation pins, making the central axis of the double-pin side and the single-pin side not on the same equator line, which may affect the fixation of the head in the prone position. There is a risk of head frame collapse and fixation failure during the operation, which increases the risk of paralysis or even suffocation death due to iatrogenic spinal cord injury

[0006] 2. The reasons for the poor position of the double-nail side are: (1) The center point of the double-nail side is a "virtual point", and the positioning of the 2.5cm upper edge of the auricle with this "virtual point" is very prone to deviation

[0007] 3. The risk of poor side position of the double nails: (1) In order to pursue intraoperative neck bending, the surgeon chooses the position of the bilateral nails to be anterior, which may be fixed on the thinner temporal bone at the anterior and lower part of the circumference to puncture the skull and increase skull fractures and cranial fractures. Serious complications such as internal hematoma

(3) Poor fixation affects the stability of the fixed head, and there is a risk of head frame collapse and fixation failure during the operation, which increases the risk of paralysis or even suffocation death due to iatrogenic spinal cord injury

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