Summary
Background
Level localization in the thoracic spine can be problematic. We describe a new method that can be used in difficult cases, e.g., ones where lesions are mid-thoracic, small, or only visible on MRI.
Methods
Intra-operatively, a midline incision was made and the thoracic spinous processes were exposed. A length of contrast-filled tubing was wound around the processes and the incision was temporarily closed and the patient was transferred to the radiology department for MRI under general anesthetic. Upon return to theatre, the cross sections of contrast-filled tubing and the lesion itself were visible on the MRI scan, allowing localization of the level.
Findings
This method was accurate and minimized the extent of bone removal required for access.
Conclusions
This technique, while not appropriate in every case, is repeatable, and does not require specialized equipment or training. It is an extremely accurate method of localization for difficult cases.
Similar content being viewed by others
References
Barrett C, Jayakrishnan V, Gholkar A, Todd NV (2009) Coil embolisation of intercostal artery for operative localisation of spinal dural arterio-venous fistulae. Br J Neurosurg 23(3):332–334
Cornips E, Beuls E, Geskes G, Janssens M, van Aalst J, Hofman P (2007) Preoperative localization of herniated thoracic discs using myelo-CT guided transpleural puncture: technical note. Childs Nerv Syst 23(1):21–26, Epub 2006 Aug 30
Endres S, Riegel T, Wilke A (2005) Preoperative marking of thoracic disc herniation (in German). Orthopade 34(8):791–793
Foley KT, Simon DA, Rampersaud YR (2001) Virtual fluoroscopy: computer-assisted fluoroscopic navigation. Spine 26(4):347–351
Foley KT, Smith MM (1996) Image-guided spine surgery. Neurosurg Clin N Am 7(2):171–186
Haberland N, Ebmeier K, Grunewald JP, Hliscs R, Kalff RL (2000) Incorporation of intraoperative computerized tomography in a newly developed spinal navigation technique. Comput Aided Surg 5(1):18–27
Holmaas G, Frederiksen D, Ulvik A, Vingsnes SO, Østgaard G, Nordli H (2006) Identification of thoracic intervertebral spaces by means of surface anatomy: a magnetic resonance imaging study. Acta Anaesthesiol Scand 50(3):368–373
Hsu W, Sciubba DM, Sasson AD, Khavkin Y, Wolinsky JP, Gailloud P, Gokaslan ZL, Murphy K (2008) Intraoperative localization of thoracic spine level with preoperative percutaneous placement of intravertebral polymethylmethacrylate. J Spinal Disord Tech 21(1):72–75
Kalfas IH, Kormos DW, Murphy MA, McKenzie RL, Barnett GH, Bell GR, Steiner CP, Trimble MB, Weisenberger JP (1995) Application of frameless stereotaxy to pedicle screw fixation of the spine. J Neurosurg 83(4):641–647
Nowitzke A, Wood M, Cooney K (2008) Improving accuracy and reducing errors in spinal surgery—a new technique for thoracolumbar-level localization using computer-assisted image guidance. Spine J 8(4):597–604, Epub 2007 Dec 21
Paolini S, Ciappetta P, Missori P, Raco A, Delfini R (2005) Spinous process marking: a reliable method for preoperative surface localization of intradural lesions of the high thoracic spine. Br J Neurosurg 19(1):74–76
Rosahl SK, Gharabaghi A, Liebig T, Feste CD, Tatagiba M, Samii M (2002) Skin markers for surgical planning for intradural lesions of the thoracic spine. Technical note. Surg Neurol 58(5):346–348
Tsai KJ, Chen SH, Chen PQ (2004) Multiple parallel skin markers for minimal incision lumbar disc surgery; a technical note. MC Musculoskelet Disord 5:8
Youkilis AS, Quint DJ, McGillicuddy JE, Papadopoulos SM (2001) Stereotactic navigation for placement of pedicle screws in the thoracic spine. Neurosurgery 48(4):771–778, discussion 778–9
Author information
Authors and Affiliations
Corresponding author
Additional information
Comments
Localization in the thoracic spine can be challenging, particularly in the setting of minimally invasive surgery. However, this localization technique seems like "a long run for a short slide". I have found counting ribs on an x-ray with a radiopaque marker in place to be very accurate, particularly when counting from below and assuming pre-operative confirmation of the actual number of ribs present. A pre-operative skin incision and muscle dissection over four or five segments that is subsequently closed for transport to the imaging device is hardly trivial. I would consider less risk to extend a bony exposure a level or two in order to find a mis-localized lesion in the unusual circumstance where radiographic localization fails.
H. Louis Harkey
Mississippi, USA
As a technical note, the authors report, an ingenious procedure to localize lesions in the thoracic spine, a region of difficult surgical navigation. The described technique takes advantage of per-operatively implanted gadolinium-enhanced interspinous process markers that are, thus, later co-registered with the surgical lesion. Being a two-staged procedure that implies the displacement of patients from the OR to the MRI suite and return, may not feasible in many hospitals worldwide. As the intra-operative transfer of patients to MRI may not be devoid of risks, and neuronavigational systems are time consuming, I still stand with more basic techniques.
Oscar Alves
Porto, Portugal
Rights and permissions
About this article
Cite this article
Barrett, C., English, P., Evans, J. et al. Intra-operative MRI-assisted spinal localization. Acta Neurochir 152, 669–673 (2010). https://doi.org/10.1007/s00701-009-0543-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00701-009-0543-7