Show simple item record

dc.contributor.authorSzakelyhidi, David C.en_US
dc.date.accessioned2014-03-14T20:41:38Z
dc.date.available2014-03-14T20:41:38Z
dc.date.issued2002-05-20en_US
dc.identifier.otheretd-07192002-162723en_US
dc.identifier.urihttp://hdl.handle.net/10919/34062
dc.description.abstractEach year, thousands of femoral and tibial internal fracture repairs are performed by orthopedic surgeons in the United States. Internal fixation of long bones using intramedullary nails (IMN) has decreased incidence of non-union, allowed shorter hospitalization time, and earlier weight bearing for the patient compared to other fixation methods. Orthopedic surgeons have expressed that one of the most difficult parts of this intramedullary nailing of long bones, is locating and drilling the interlocking screw holes. IMN interlocking requires the surgeon to locate the holes in the nail, center the drill, and advance the bit through the bone to meet them. Many novel procedures and devices have been developed to assist the surgeon in distal locking of intramedullary nails, but have some disadvantages. These can include the need for extensive x-ray exposure, expensive x-ray equipment, high power consumption, active electronics in vivo, soft tissue damage, which all lead to inaccurate screw placement. For these reasons, a new prototype device for locating and drilling IMN distal interlocking holes has been developed. This prototype device uses magnetic sensors to locate a permanent magnet placed at a know distance from the IMN interlocking hole. A drill sleeve may be attached to the targeting sensors so that when they are aligned with the target magnet, the drill sleeve is aligned with the axis of the interlocking hole to be drilled. This new prototype device has significant advantages over existing devices, including the following. It has no active or passive electronics in vivo, no x-ray imaging is needed for targeting, while allowing real time feedback of alignment. It is a percutaneous technique, which can be adapted for use with existing IMN's. The new prototype also has low power requirements allowing battery operation, a single target magnet with unique axisymmetric field and novel magnet orientation, and adjustable sensitivity. Additionally, the new device allows visual, audible, or tactile positioning feedback. This prototype magnetic targeting device can improve orthopedic surgeons' ability to target and drill distal IMN interlocking screw holes. This device may allow shorter surgery, decreased x-ray exposure, and fewer complications for the surgeon and patient.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartComplete_Thesis.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectDistal Interlockingen_US
dc.subjectIntramedullary Nailingen_US
dc.subjectMagnetic Targetingen_US
dc.titleDevelopment of a magnetic targeting device applied to interlocking of distal intramedullary nail screw holes.en_US
dc.typeThesisen_US
dc.contributor.departmentBiomedical Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineBiomedical Engineeringen_US
dc.contributor.committeechairDurham, A.en_US
dc.contributor.committeechairWicks, Alfred L.en_US
dc.contributor.committeememberScott, Elaine P.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-07192002-162723/en_US
dc.date.sdate2002-07-19en_US
dc.date.rdate2005-10-14
dc.date.adate2002-07-30en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record