Methods and devices for protecting catheter tips and stereotactic fixtures for microcatheters
First Claim
Patent Images
1. A method of inserting a catheter into a patient, comprising:
- registering a stereotactic system to the patient;
inserting the catheter having a tip protection device disposed over a distal tip thereof into a working channel of the stereotactic system until a depth stop on the tip protection device prevents further insertion, the tip protection device comprising an elongate body having a central lumen extending longitudinally therethrough configured to slidably receive the catheter, the tip protection device further including a locking mechanism comprising a set screw configured to intersect the central lumen, wherein the locking mechanism of the tip protection device is engaged with a portion of the catheter in the central lumen during insertion to hold the catheter in a fixed longitudinal position with respect to the tip protection device and, thereby, to prevent the catheter from advancing longitudinally any of distally and proximally in the tip protection device;
releasing the locking mechanism of the tip protection and advancing the catheter distally into the patient; and
engaging a locking mechanism of the stereotactic system with the tip protection device by tightening a set screw of the stereotactic system such that the set screw contacts an outer surface of the body of the tip protection device while the catheter is located within the central lumen of the tip protection device, thereby engaging the tip protection device onto the catheter to maintain a fixed longitudinal position between the catheter and the stereotactic system.
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Abstract
Methods and devices are disclosed herein that generally provide protection for devices (e.g., microcatheters) having small tips. Methods and devices are also disclosed herein that generally facilitate use of commercially-available stereotactic systems with devices (e.g., microcatheters) having small tips.
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Citations
16 Claims
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1. A method of inserting a catheter into a patient, comprising:
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registering a stereotactic system to the patient; inserting the catheter having a tip protection device disposed over a distal tip thereof into a working channel of the stereotactic system until a depth stop on the tip protection device prevents further insertion, the tip protection device comprising an elongate body having a central lumen extending longitudinally therethrough configured to slidably receive the catheter, the tip protection device further including a locking mechanism comprising a set screw configured to intersect the central lumen, wherein the locking mechanism of the tip protection device is engaged with a portion of the catheter in the central lumen during insertion to hold the catheter in a fixed longitudinal position with respect to the tip protection device and, thereby, to prevent the catheter from advancing longitudinally any of distally and proximally in the tip protection device; releasing the locking mechanism of the tip protection and advancing the catheter distally into the patient; and engaging a locking mechanism of the stereotactic system with the tip protection device by tightening a set screw of the stereotactic system such that the set screw contacts an outer surface of the body of the tip protection device while the catheter is located within the central lumen of the tip protection device, thereby engaging the tip protection device onto the catheter to maintain a fixed longitudinal position between the catheter and the stereotactic system. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of inserting a catheter into a patient, comprising:
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registering a stereotactic system to the patient; inserting the catheter having a tip protection device disposed over a distal tip thereof into a working channel of the stereotactic system until a depth stop on the tip protection device prevents further insertion; releasing a locking mechanism of the tip protection device that prevents the catheter from moving longitudinally any of distally and proximally within the tip protection device, where the releasing step includes releasing the locking mechanism by loosening a set screw of the tip protection device thereby laterally withdrawing the set screw from a central lumen of the tip protection device in which the catheter is disposed such that the catheter is free to move longitudinally with respect to the tip protection device and the working channel, and advancing the catheter distally into the patient; and engaging a locking mechanism of the stereotactic system over the tip protection device, thereby tightening the tip protection device onto the catheter to fix a longitudinal position between the catheter, the tip protection device, and the stereotactic system. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method of inserting a catheter into a patient, comprising:
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registering a stereotactic system to the patient; inserting the catheter having a tip protection device disposed over a distal tip thereof into a working channel of the stereotactic system until a depth stop on the tip protection device prevents further insertion, the tip protection device comprising an elongate body having a central lumen extending longitudinally therethrough configured to slidably receive the catheter, the tip protection device further including a locking mechanism comprising a set screw configured to intersect the central lumen, wherein the locking mechanism of the tip protection device is engaged with a portion of the catheter in the central lumen during insertion to hold the catheter in a fixed longitudinal position with respect to the tip protection device; piercing a dura of the patient with a sharpened distal tip of the tip protection device; removing the tip protection device from the stereotactic system and snapping off the sharpened distal tip of the tip protection device at a perforated snap portion; reinserting the tip protection device through the stereotactic system; releasing the locking mechanism of the tip protection device and advancing the catheter distally into the patient; and engaging a locking mechanism of the stereotactic system with the tip protection device by tightening a set screw of the stereotactic system such that the set screw contacts an outer surface of the body of the tip protection device while the catheter is located within the central lumen of the tip protection device, thereby engaging the tip protection device onto the catheter to maintain a fixed longitudinal position between the catheter and the stereotactic system.
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Specification