PMC9981232_01
Time score of 3 m Timed Up and Go test in each period (average +- standard deviation). Preop 1, postop 1, preop 2, and postop 2 refer to before the first shunt surgery (age 77), 1 year after the first shunt surgery (age 78), before the shunt revision (age 80), and 2-3 weeks after shunt revision, respectively. The asterisks indicate statistical significance in the independent t-test (p < 0.01).
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Fig. 1.
Lateral view of the head X-ray 1 year after the first surgery (A) and at the time of the present admission (B). Computed tomography of the right paramedian sagittal section 1 year after the first surgery (C) and at present admission (D).
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The reservoir of her shunt valve did not collapse, and the adjustment of the valve-opening pressure did not improve her symptoms. Fig. 2 shows X-ray photographs (A, B) and parasagittal CT (C, D) 1 year after the first surgery and at the time of admission, respectively. These images suggest that the ventricular catheter had disconnected from the shunt valve and migrated into the cranium.
The distal end of the ventricular catheter was found just below the skin incision, coinciding with the burr hole.
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As the distal end of the proximal catheter was facing the burr hole (Fig. 3), it could be carefully pulled and removed.