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Percutaneous insertion of Dual Growth Rods using a new mobile bearing implant

Shaw, Matthew J., Martin, Sam, Izatt, Maree T., Adam, Clayton J., Labrom, Robert D., & Askin, Geoffrey N. (2009) Percutaneous insertion of Dual Growth Rods using a new mobile bearing implant. In Williamson, Owen (Ed.) Annual Scientific Meeting of the Spine Society of Australia, 17-19 April 2009, Sofitel Hotel, Brisbane. (Unpublished)

Abstract

Growth rods are commonly used for the treatment of scoliosis in the immature spine. Many variations have been proposed but breakage of implants is a common problem. Growth rod insertion commonly involves large exposures at initial insertion followed by multiple smaller procedures for lengthening. We present our early experiences using a percutaneous technique of insertion of a new titanium mobile bearing implant (Medtronic Inc). The implant allows some rotatory motion in the middle of the construct thus reducing construct stresses and thus possibly reducing rod breakage risk. Based on this small initial series with 12 months follow-up, percutaneous insertion of growth rods using the new implant is a safe and reliable technique although the infection rate in our sample was of note. This may be related to the titanium wear and inflammation seen in the soft tissues at time of operation and visualised on histology. No implants have required removal due to infection, and all infections were treated with debridement at next lengthening and suppressive antibiotics. Propionibacterium is one of the commonest infections seen with spinal implants and sometimes does not respond to simple antibiotic suppression. The technique allows preservation of the soft tissues until definitive fusion is needed and may lead to a decrease in hospital stay. The implant is low profile and seems to offer advantages over other systems on the market. Further follow up is needed to look at longer term outcomes with this new implant type.

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ID Code: 25954
Item Type: Conference Item (Poster)
Additional URLs:
Keywords: spinal deformity, growing rods, percutaneous, scoliosis
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > CLINICAL SCIENCES (110300) > Orthopaedics (110314)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Current > Institutes > Institute of Health and Biomedical Innovation
Past > Schools > School of Engineering Systems
Copyright Owner: Copyright 2009 [please consult the authors]
Deposited On: 26 Jun 2009 14:36
Last Modified: 11 Aug 2011 03:24

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