INR scope

Pull-on-pipe maneuver for rescuing a prolapsed flow diverter

Author: DIESTRO Jose Danielo B

Find out how Dr. Jose Danilo B. Diestro (St. Michael’s Hospital, University of Toronto Department of Medical Imaging Toronto, Canada) treated a 21-year-old male patient suffering from an incidental aneurysm in the right internal carotid artery.

Monday 14 March 2022
  • Case


    • Case timeline
    Pop maneuver


    • Neuroimaging


    Pop maneuver


    • Diagnostic angio


    Pop maneuver



    • In the process of retrieving the flow diverter wire with the microcatheter, the PED was inadvertently pushed into the aneurysm. The resulting partial prolapse moved the proximal edge of the PED dangerously close into the aneurysm lumen. (See Figure 2B,E) Pulling on the microcatheter over the microwire only partly reduced the degree of prolapse.
    • The POP maneuver was then performed to restore the PED into its desired configuration:
    • After removal of the wire, a second PED (5.0 x 30mm) was partially deployed in the mid aspect of the first PED.
    • After apposition of the deployed portion of the second PED inside the first PED, we pulled on the second PED to restore the positioning of the first PED.
    • The second pipeline stent was then completely deployed proximally on the petrous ICA. (See Figure 2C,F)


    Pop maneuver



    • No more diplopia


    Pop maneuver



    • Srinivasan VM, Carlson AP, Mokin M, et al. Prolapse of the Pipeline embolization device in aneurysms: incidence, management, and outcomes. Neurosurg Focus. Chalouhi N, Tjoumakaris SI, Gonzalez LF, et al. Spontaneous Delayed Migration/Shortening of the Pipeline Embolization Device: Report of 5 Cases. Am J Neuroradiol.


    Pop maneuver



    • Be careful of balloon angioplasty and distal wire recapture


    Pop maneuver



    • Among 14 case reports of prolapsed flow diverters:
      • 3 occurred during balloon angioplasty to improve apposition
      • 2 during distal wire capture



    • Among 14 case reports of prolapsed flow diverters, no intervention was done for 5
    • Of these 5, 2 died from aneurysm rupture
    • Coincidentally these two also presented in a delayed fashion (7 and 3 days post-procedure



    • What other maneuvers could have been done to reposition?
    • Pipe sizing concerns?
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