# Sternale cerclage tråde (sternal wires)

[![MRI Conditional.png](https://mrdb.friishns.eu/uploads/images/gallery/2026-04/scaled-1680-/mri-conditional.png)](https://mrdb.friishns.eu/uploads/images/gallery/2026-04/mri-conditional.png)

<table border="1" id="bkmrk-fabrikat%2Fmodel%3A-foru" style="border-collapse: collapse; width: 100%; height: 357.563px; border-width: 1px; background-color: rgb(236, 240, 241);"><colgroup><col style="width: 29.4644%;"></col><col style="width: 70.6548%;"></col></colgroup><tbody><tr style="height: 29.7969px;"><td style="height: 29.7969px;">**Fabrikat/model:**</td><td style="height: 29.7969px;">Sternale cerclage tråde (sternal wires) — generisk. Fremstillet af rustfrit stål, titanium eller nitinol. Anvendes til sternallukning efter sternotomi.</td></tr><tr style="height: 29.7969px;"><td style="height: 29.7969px;">**Statisk feltstyrke:**</td><td style="height: 29.7969px;">1,5 Tesla / 3 Tesla</td></tr><tr style="height: 29.7969px;"><td style="height: 29.7969px;">**Scannerarkitektur:**</td><td style="height: 29.7969px;">Ingen restrektioner</td></tr><tr style="height: 29.7969px;"><td style="height: 29.7969px;">**Spatial gradient:**</td><td style="height: 29.7969px;">Ingen restriktioner</td></tr><tr style="height: 29.7969px;"><td style="height: 29.7969px;">**Slew rate (Gr):**</td><td style="height: 29.7969px;">Ingen restriktioner</td></tr><tr style="height: 29.7969px;"><td style="height: 29.7969px;">**SAR:**</td><td style="height: 29.7969px;">Body: 2,0 W/kg

</td></tr><tr style="height: 29.7969px;"><td style="height: 29.7969px;">**B1+rms:**</td><td style="height: 29.7969px;">Ikke oplyst</td></tr><tr style="height: 29.7969px;"><td style="height: 29.7969px;">**Coil type:**</td><td style="height: 29.7969px;">Ingen restrektioner</td></tr><tr style="height: 29.7969px;"><td style="height: 29.7969px;">**Artefakter:**</td><td style="height: 29.7969px;">Må forventes i nærhed af sternum. Omfanget afhænger af materiale (stainless steel &gt; titanium/nitinol). Ingen sikkerhedsrisiko.</td></tr><tr style="height: 29.7969px;"><td style="height: 29.7969px;">**Temperaturstigning:**</td><td style="height: 29.7969px;">Må kunne forventes — særligt ved thoraxscanning og SAR-intensive sekvenser. Patient informeres om at melde varme eller ubehag.</td></tr><tr style="height: 29.7969px;"><td style="height: 29.7969px;">**Kilde (se evt. pdf):**</td><td style="height: 29.7969px;">- Baikoussis et al. (2011) — *Annals of Thoracic Surgery* — [https://www.annalsthoracicsurgery.org/article/S0003-4975(11)00495-4/fulltext](https://www.annalsthoracicsurgery.org/article/S0003-4975(11)00495-4/fulltext)
- Levine et al. (2007) — *Circulation / AHA* — [https://www.ahajournals.org/doi/10.1161/CIRCULATIONAHA.107.187256](https://www.ahajournals.org/doi/10.1161/CIRCULATIONAHA.107.187256)
- NHS GGC MRI Physics GISP + detaljeret litteraturgennemgang — [https://www.mriphysics.scot.nhs.uk/implant-safety-policies/sternal-wires-and-fixation-devices/](https://www.mriphysics.scot.nhs.uk/implant-safety-policies/sternal-wires-and-fixation-devices/)
- MRIquestions.com (Elster) — [https://mriquestions.com/sternal-wiresimplants.html](https://mriquestions.com/sternal-wiresimplants.html)

</td></tr></tbody></table>

<table border="1" id="bkmrk-kommentarer-til-impl" style="border-collapse: collapse; width: 100%; height: 59.5938px; border-width: 1px; background-color: rgb(251, 238, 184);"><colgroup><col style="width: 99.881%;"></col></colgroup><tbody><tr style="height: 29.7969px;"><td style="height: 29.7969px;">**Kommentarer til implantat**</td></tr><tr style="height: 29.7969px;"><td style="height: 29.7969px;">Sternale cerclage tråde er fikseret til sternum og udgør ingen risiko for displacement eller migration i magnetfeltet. Et enkelt brud på en tråd er ikke en kontraindikation. Verificér at nålen er fjernet fra tråden inden scanning. Tjek operationsjournal for eventuelle øvrige implantater indsat under samme operation (fx epicardiale elektroder, vaskulære klips). Nitinol- og titaniumvarianter har generelt ingen yderligere restriktioner ud over standard SAR-hensyn.</td></tr></tbody></table>