Passive Navigation System with Volumetric Planning and Anatomical Landmark Alignment for Deep Brain Targeting in Neurosurgery

Abstract

The invention is a modular passive guidance system that provides high targeting accuracy in ventricular catheterization procedures without the need for expensive active navigation equipment (10). Its key feature is that a virtual reference prism (19) created in the surgical planning software is digitally superimposed with the patient's external anatomical landmarks (20), and this superposition is physically verified by means of special geometry sighting grooves (15) on the device, enabling the catheter to advance along the planned trajectory (18).

Description

1 TARIFF Volumetric For Deep Brain Targeting in Neurosurgery Planning-Supported and Anatomically Aligned Landmarks Passive Navigation System Technical Field Invention; neurosurgery and computer-assisted surgery 5 It is related to intervention techniques, especially ventriculostomy and During access to deep brain lesions, personalized radiological data through a mechanical interface in the surgical field It includes routing systems that enable verification. State of the Art (Prior Art) Current ventricular 10 Drainage guides (e.g., Ghajar guides) are usually placed on the skull. These are "static" devices based on vertical entry. However, the ventricle... Because anatomy varies from patient to patient, these tools are highly effective. It has a margin of error. Active neuronavigation systems, on the other hand, Despite its accuracy, it has high costs and calibration difficulties. 15 and it has limitations such as not being found in every operating room. In the literature, a low-cost mechanical device can be used to create a complex Dynamic through landmarks (Glabella, Nasion, etc.) No system capable of performing orbit verification has been identified. The Technical Problem Solved by the Invention and Technique 20 Advantages: The fundamental problem solved by the invention; active sensors. without using, "volumetric" in surgical planning software by converting "data" into a physical "sight line" It is about precise targeting. Technical Advantages: 1. Low Cost: Can be produced with a 3D printer. 25 2. High Accuracy: 3.4 mm sight grooves (15), It minimizes the parallax error in the surgeon's field of view. 3. Personalization: Based on each patient's unique landmarks. The trajectory (18) can be revised instantaneously. 2 Explanation of the Shapes in the Images Figure 1: Perspective view of the passive steering system. Figure 2: Top (plan) view of the passive steering system. Figure 3: Interlocking structure and center of the plates. Detailed view of the channel. 5 Figure 4: Representation of the system on the patient's skull structure. The appearance of its positioning. Figure 5: Anatomical landmarks of the virtual reference prism. The appearance of its projection on the surface. Detailed Description of the Invention The system consists of a first plate (11) and 10 a modular system in which a second plate (12) locks vertically together It consists of (10) structures. In the center of these plates, a catheter or There is a 3 mm guide channel (14) for the passage of the stiletto. The real innovation of the invention lies in the plates' arms, and 15 of the reference prism in the planning software (19) approximately 3.4 mm wide corresponding to their projections These are the sight grooves (15). These grooves are the glabella, which the surgeon uses to aim at the surgeon. nasion, lateral canthus, acanthion and meatus acusticus internus such as depth and angle defining landmarks (20) by enabling it to obtain the accuracy of the trajectory (18) surgical 20 physically seals the site.

Claims

3 REQUESTS CLAIM 1: The invention describes a passive device for ventricular catheterization. The routing system (10) has the following features: • In the center of it The guide channel (14) will be located vertically along the axis. • It must contain at least two interlocking plates (11, 12), • Word 5 The subject is a surgical planning software on the plates. outside the ideal catheter trajectory (18) determined by means of Enabling it to match with anatomical reference points (20), to the sight grooves (15) which form a linear line of sight It is having. 10 REQUEST 2: The system specified in Request 1 is (10) and its feature is; Angular deviations of the sight grooves (15) in the line of sight approximately 3.4 mm wide to minimize It is the fact that. REQUEST 3: The system specified in Request 1 is (10) and its feature is; 15 slots that allow the plates to fit together (11a, 12a), 10.1 mm precision for maintaining vertical and horizontal stability. It is about having tolerance. REQUEST 4: The system specified in Request 1 is (10) and its feature is; glabella, nasion, lateral canthus, acanthion and meatus 20 at least two landmarks selected from among the acousticus internus (20), visually through the sight line (15) of the device It is verifiable. REQUEST 5: The system specified in Request 1 is (10) and its feature is; A virtual 25 designed in pre-surgical digital planning. corner or surface of volumetric reference prism (19) their projections, through the physical sight grooves (15) a mechanical and methodological navigation that transfers to the surgical field It has an interface.

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