Kai Sprengel

Dr. Kai Sprengel

Department of Trauma, University Hospital Zurich (USZ), University of Zurich (UZH), Raemistr. 100, CH-8091 Zurich, Switzerland
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Research Focus & Metrics

Academic Career Length

16Years (2011-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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23 May 2017 in Anaesthesia
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Journal Article
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PSP. Stein
P. Stein
Alexander KasererAlexander Kaserer
Alexander Kaserer
Kai SprengelKai Sprengel
Kai Sprengel
GWG. A. Wanner
G. A. Wanner
BSB. Seifert
B. Seifert
DSDonat Spahn
Donat Spahn

1 March 2015 in British Journal of Radiology
Verified
Journal Article
Closed access
SGS Gordic
S Gordic
Hatem AlkadhiHatem Alkadhi
Hatem Alkadhi
SHS Hodel
S Hodel
HSH-P Simmen
H-P Simmen
MBM Brueesch
M Brueesch
Kai SprengelKai Sprengel
Kai Sprengel
To determine the number of imaging examinations, radiation dose and the time to complete trauma-related imaging in multiple trauma patients before and after introduction of whole-body CT (WBCT) into early trauma care. 120 consecutive patients before and 120 patients after introduction of WBCT into the trauma algorithm of the University Hospital Zurich were compared regarding the number and type of CT, radiography, focused assessment with sonography for trauma (FAST), additional CT examinations (defined as CT of the same body regions after radiography and/or FAST) and the time to complete trauma-related imaging. In the WBCT cohort, significantly more patients underwent CT of the head, neck, chest and abdomen (p < 0.001) than in the non-WBCT cohort, whereas the number of radiographic examinations of the cervical spine, chest and pelvis and of FAST examinations were significantly lower (p < 0.001). There were no significant differences between cohorts regarding the number of radiographic examinations of the upper (p = 0.56) and lower extremities (p = 0.30). We found significantly higher effective doses in the WBCT (29.5 mSv) than in the non-WBCT cohort (15.9 mSv; p < 0.001), but fewer additional CT examinations for completing the work-up were needed in the WBCT cohort (p < 0.001). The time to complete trauma-related imaging was significantly shorter in the WBCT (12 min) than in the non-WBCT cohort (75 min; p < 0.001). Including WBCT in the initial work-up of trauma patients results in higher radiation doses, but fewer additional CT examinations are needed, and the time for completing trauma-related imaging is shorter. WBCT in trauma patients is associated with a high radiation dose of 29.5 mSv.

1 October 2021 in JBJS Reviews
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Journal Article
Open access
SHSascha Halvachizadeh
Sascha Halvachizadeh
ASAnna-Lea Stalder
Anna-Lea Stalder
DBDavid Bellut
David Bellut
SHSven Hoppe
Sven Hoppe
PRPhilipp Rossbach
Philipp Rossbach
HPHans-Christoph Pape
Hans-Christoph Pape
Background: Osteoporotic vertebral fractures (OVFs) have become increasingly common, and previous nonrandomized and randomized controlled trials (RCTs) have compared the effects of cement augmentation versus nonoperative management on the clinical outcome. This meta-analysis focuses on RCTs and the calculated differences between cement augmentation techniques and nonsurgical management in outcome (e.g., pain reduction, adjacent-level fractures, and quality of life [QOL]). Methods: A systematic review was performed according to the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines, and the following scientific search engines were used: MEDLINE, Embase, Cochrane, Web of Science, and Scopus. The inclusion criteria included RCTs that addressed different treatment strategies for OVF. The primary outcome was pain, which was determined by a visual analog scale (VAS) score; the secondary outcomes were the risk of adjacent-level fractures and QOL (as determined by the EuroQol-5 Dimension [EQ-5D] questionnaire, the Oswestry Disability Index [ODI], the Quality of Life Questionnaire of the European Foundation for Osteoporosis [QUALEFFO], and the Roland-Morris Disability Questionnaire [RDQ]). Patients were assigned to 3 groups according to their treatment: vertebroplasty (VP), kyphoplasty (KP), and nonoperative management (NOM). The short-term (weeks), midterm (months), and long-term (>1 year) effects were compared. A random effects model was used to summarize the treatment effect, including I 2 for assessing heterogeneity and the revised Cochrane risk-of-bias 2 (RoB 2) tool for assessment of ROB. Funnel plots were used to assess risk of publication bias. The log of the odds ratio (OR) between treatments is reported. Results: After screening of 1,861 references, 53 underwent full-text analysis and 16 trials (30.2%) were included. Eleven trials (68.8%) compared VP and NOM, 1 (6.3%) compared KP and NOM, and 4 (25.0%) compared KP and VP. Improvement of pain was better by 1.31 points (95% confidence interval [CI], 0.41 to 2.21; p < 0.001) after VP when compared with NOM in short-term follow-up. Pain effects were similar after VP and KP (midterm difference of 0.0 points; 95% CI, −0.25 to 0.25). The risk of adjacent-level fractures was not increased after any treatment (log OR, −0.16; 95% CI, −0.83 to 0.5; NOM vs. VP or KP). QOL did not differ significantly between the VP or KP and NOM groups except in the short term when measured by the RDQ. Conclusions: This meta-analysis provides evidence in favor of the surgical treatment of OVFs. Surgery was associated with greater improvement of pain and was unrelated to the development of adjacent-level fractures or QOL. Although improvements in sagittal balance after surgery were poorly documented, surgical treatment may be warranted if pain is a relevant problem. Level of Evidence: Therapeutic Level I. See Instructions for Authors for a complete description of levels of evidence.

21 February 2018 in World Journal of Surgery
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Journal Article
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CWChristian Waydhas
Christian Waydhas
MBMarkus Baake
Markus Baake
LBLars Becker
Lars Becker
BBBoris Buck
Boris Buck
HDHelena Düsing
Helena Düsing
Dan BielerDan Bieler
Dan Bieler

11 May 2019 in European Journal of Trauma and Emergency Surgery
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Journal Article
Closed access
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MTMichel Paul Johan Teuben
Michel Paul Johan Teuben
NLNikolaus Löhr
Nikolaus Löhr
KJKai Oliver Jensen
Kai Oliver Jensen
MBMartin Brüesch
Martin Brüesch
SMStephan Müller
Stephan Müller
Kai SprengelKai Sprengel
Kai Sprengel

1 April 2018 in European Journal of Trauma and Emergency Surgery
Verified
Journal Article
Closed access
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MKM. A. König
M. A. König
SHS. Hediger
S. Hediger
JSJ. W. Schmitt
J. W. Schmitt
TJThorsten Jentzsch
Thorsten Jentzsch
Kai SprengelKai Sprengel
Kai Sprengel
CWC. M. L. Werner
C. M. L. Werner