Simplified jailed balloon technique: proof-of-concept for side branch preservation without routine proximal optimization or final kissing balloon
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Updated: Nov 1, 2026
Remotely Triggered LAD Occlusion Using a Balloon Catheter in Spontaneously Breathing Mice
Published on: March 22, 2024
Jumpei Todoroki1, Ryuji Shiraishi2, Tasuku Sakurai2
1Department of Cardiology, Chubu Tokushukai Hospital, Kitanakagusuku, Japan;
Objectives:
The modified jailed balloon technique (M-JBT) decreases side branch (SB) occlusion during bifurcation percutaneous coronary intervention by simultaneously inflating an SB balloon alongside main vessel stent deployment. Conventionally, M-JBT requires subsequent proximal optimization (POT), SB rewiring, and final kissing balloon inflation (KBI), adding complexity to the procedure. The authors defined a simplified approach-the Simplified Jailed Balloon Technique (S-JBT)-where postdilation is performed using only the stent delivery balloon, omitting POT, rewiring, and final KBI.
Methods:
To validate the physiological rationale of S-JBT, the authors measured SB resting full-cycle ratio (RFR) at 3 time points (baseline, post-M-JBT, and postdilation) in 6 consecutive patients undergoing S-JBT for LAD-diagonal bifurcation lesions using the jailed pressure wire technique.
Results:
RFR was maintained at all timepoints (baseline: 0.82 ± 0.17; post-M-JBT: 0.84 ± 0.14; postdilation: 0.86 ± 0.15), with no angiographic SB compromise.
Conclusions:
These findings suggest that the favorable SB ostial geometry established with simultaneous inflation persists after stent balloon postdilation, and that the primary mechanism of SB protection resides in the simultaneous inflation step. S-JBT may offer a practical, simplified SB protection strategy, particularly for bifurcation lesions with small side branches.
