Universität zu Köln

Bredow, J., Beyer, F., Oppermann, J., Kraus, B., Meyer, C., Stein, G., Eysel, P. and Koy, T. (2016). A novel classification of screw placement accuracy in the cervical spine. Technol. Health Care, 24 (6). S. 919 - 926. AMSTERDAM: IOS PRESS. ISSN 1878-7401

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Abstract

BACKGROUND: Goal of this study is to present an easily reproducible and reliable measurement to evaluate accuracy of screw placement in cervical spine. METHODS: Accuracy of cervical screw position was assessed in 52 patients treated with 163 screws. Each patient receiving pedicle, transarticular C1/2, lateral mass, or laminar screws and postoperative CT scan was included. Placement position was categorized in 5 grades: Grade 1 is ideal with pedicle wall perforation < 1 mm, grade 2 < 2 mm, grade 3 < 3 mm, and grade 4 < 4 mm. Grade 5 > 4 mm and/or obstruction of transverse foramen by more than half a screw diameter. Intraclass correlation coefficient (ICC) values were assessed for inter-and intraobserver reliability. RESULTS: The mode of individual evaluations was calculated to assign a single value to each screw. This yielded 89 grade 1 (54.6%), 48 grade 2 (29.4%), 14 grade 3 (8.6%), 3 grade 4 (1.8%), and 9 grade 5 (5.5%) screws. Intraobserver reliability ICC was 0.966 and 0.959 for measurements. Interobserver reliability ICC was 0.938. CONCLUSION: This study introduces a reliable classification of cervical spine instrumentation with various screw types. This should enable the use of a uniform and reproducible, and thus comparable classification for screw position in cervical spine.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Bredow, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Beyer, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Oppermann, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kraus, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Meyer, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stein, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Eysel, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Koy, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-288573
DOI:	10.3233/THC-161246
Journal or Publication Title:	Technol. Health Care
Volume:	24
Number:	6
Page Range:	S. 919 - 926
Date:	2016
Publisher:	IOS PRESS
Place of Publication:	AMSTERDAM
ISSN:	1878-7401
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PEDICLE SCREW; LATERAL MASS; NONTRAUMATIC LESIONS; PULLOUT STRENGTH; FIXATION; FLUOROSCOPY; NAVIGATION; COMPLICATIONS; STABILITY; GUIDANCE Multiple languages Health Care Sciences & Services; Engineering, Biomedical Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/28857