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3D image-guided surgery for fragility fractures of the sacrum

  • Horst BallingEmail author
Surgical Technique
  • 8 Downloads

Abstract

Objective

Stabilizing sacral fragility fractures without radiation exposure to the surgical team.

Indications

Non-displaced or minimally displaced unilateral or bilateral transalar, transforaminal or central sacral fractures in weak and osteoporotic bone.

Contraindications

Displaced or highly unstable sacral fractures. Patients under therapeutic anticoagulation. Patients needing fast track orthopedic surgery.

Surgical technique

Prone position. Reference clamp installation on posterior iliac crest. Initial 3D scan of posterior pelvic ring. Image-guided virtual determination of 2–3 interforaminal iliosacroiliac trajectories in sacral vertebrae I and II. Lateral transgluteal mini-open approach. 3D image-guided insertion of 2–3 guide wires along planned trajectories. 3D-scan for controlling guide wire positions. Virtual determination of screw lengths. Cortical drilling and cannulated screw insertion along guide wires. Radiological documentation.

Follow-up

Clinical and radiological follow-up after 12 weeks, 12 and 24 months including radiographs in anteroposterior, lateral, inlet and outlet views.

Results

From October 2011 until October 2016 a total of 124 sacral fracture sites (in sacral vertebrae I and II) were treated with 120 navigated sacral screws in 52 patients (48 females, 4 males; mean age 76 ± 10 years, range 36–90 years) using 3D image guidance for screw placement. Image-guidance accuracy was 99.2% (119/120 screws correctly placed). Complications comprised revision surgery for subfascial hematoma evacuation (n = 1) and screw removal due to loosening after 12 weeks (n = 2). Four patients died before final follow-up. Mean pain visual analogue scale (VAS) decreased from 8.9 ± 1.1 (presurgery value) over 3.6 ± 1.7 (postsurgery value) to 1.8 ± 1.9 (2-year follow-up value), mean Oswestry disability index (ODI) improved from 86.2 ± 4.9% (presurgery value) over 28.5 ± 9.5% (postsurgery value) to 23.3 ± 13.7% (2-year follow-up value).

Keywords

Navigation Posterior pelvic ring 3D-Fluoroscopy Sacral screw fixation Sacral fractures 

Die 3D-navigierte operative Versorgung von Fragilitätsfrakturen des Sakrums

Zusammenfassung

Operationsziel

Belastungsstabile Schraubenosteosynthese nichtdislozierter Sakrumfrakturen ohne Strahlenbelastung des OP-Personals.

Indikationen

Nicht-/wenig dislozierte ein-/beidseitige und zentrale Sakrumfrakturen bei reduzierter Knochenqualität/Osteoporose.

Kontraindikationen

Dislozierte/hochgradig instabile Sakrumfrakturen. Therapeutische Antikoagulation. Kreislaufinstabilität.

Operationstechnik

Bauchlagerung. Installieren der Navigationsreferenz am hinteren Beckenkamm. 3‑D-Scan des hinteren Beckenrings. Navigierte virtuelle Festlegung von 2–3 interforaminalen iliosakralen Trajektorien im 1. und 2. Sakralwirbel. Minimal-invasiver lateraler transglutealer Zugang. Navigiertes Einbringen von 2–3 Führungsdrähten entlang der geplanten Trajektorien. 3‑D-Scan zur Kontrolle der Führungsdrahtlage. Virtuelle Schraubenlängenbestimmung. Führungsdrahtgeführtes Aufbohren der Kortikalis und Eindrehen der Schrauben. Röntgendokumentation.

Weiterbehandlung

Klinisch-radiologische Nachuntersuchungen nach 12 Wochen, 12 und 24 Monaten mit Röntgenaufnahmen in anteroposteriorem und lateralem Strahlengang sowie Inlet/Outlet-Aufnahmen.

Ergebnisse

Von Oktober 2011 bis Oktober 2016 wurden 52 Patienten (48 Frauen, 4 Männer, Durchschnittsalter 76 ± 10 [Spannweite: 36–90] Jahre) mit insgesamt 124 sakralen Frakturen (S1, S2) mittels 120 navigiert eingebrachter Schrauben versorgt. Die Schraubenplatzierungsgenauigkeit betrug 99,2 % (119/120 korrekt platzierte Schrauben). Komplikationen erforderten Revisionsoperationen bei subfaszialem Hämatom (n = 1) und Schraubenlockerung nach 12 Wochen (n = 2). Nach 2 Jahren waren 4 Patienten verstorben. Im verbliebenen Kollektiv hatte sich das Schmerzniveau von 8,9 ± 1,1 (präoperativ) auf 3,6 ± 1,7 (postoperativ) bis auf 1,8 ± 1,9 (2-Jahres-Nachuntersuchung) VAS-Punkte (visuelle Analogskala), der ODI (Oswestry-Disability-Index) von 86,2 ± 4,9 % (präoperativ) über 28,5 ± 9,5 % (postoperativ) auf 23,3 ± 13,7 % (zum 2‑Jahres-Nachuntersuchungszeitpunkt) gebessert.

Schlüsselwörter

Navigation Hinterer Beckenring 3D-Fluoroskopie Sakrale Schraubenosteosynthese Sakrumfrakturen 

Notes

Compliance with ethical guidelines

Conflict of interest

H. Balling declares that he has no competing interests.

All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975 (in its most recently amended version). Informed consent was obtained from all patients included in the study. Additional informed consent was obtained from all individual participants for whom identifying information is included in this article.

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Copyright information

© Springer Medizin Verlag GmbH, ein Teil von Springer Nature 2019

Authors and Affiliations

  1. 1.Center for Spine SurgeryNeckar-Odenwald-Kliniken gGmbH BuchenBuchenGermany

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