Table 3 Complication due to surgery (each subject could have more than one complication)

Complication
 No of patients
At treatment site:

    Dural tear
5
    Excessive bleeding
3
    Implant problems
5
    Bone fracture
1
    Vascular injury
1
    Loss of purchase or fixation
3
    Broken drain
1
Associated with surgical approach:

    Vascular injury
1
    Other (loss of swab 1, peritoneal tear 2)
3
Systemic:

    Haemorrhage
1
Further surgery (up to 2 years' follow-up)
11

A total of 19 patients had complications as a result of surgery.

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