Mel J. Sharafuddin, MD, FACS, Jay K

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Presentation transcript:

Distal landing zone optimization before endovascular repair of aortic dissection Mel J. Sharafuddin, MD, FACS, Jay K. Bhama, MD, Mohammad Bashir, MD, Maen S. Aboul-Hosn, MD, Jeanette H. Man, MD, Alexandra J. Sharp The Journal of Thoracic and Cardiovascular Surgery Volume 157, Issue 1, Pages 88-98 (January 2019) DOI: 10.1016/j.jtcvs.2018.06.095 Copyright © 2018 The American Association for Thoracic Surgery Terms and Conditions

The Journal of Thoracic and Cardiovascular Surgery 2019 157, 88-98DOI: (10.1016/j.jtcvs.2018.06.095) Copyright © 2018 The American Association for Thoracic Surgery Terms and Conditions

Figure 1 DLZO to enable exclusion of FL aneurysm in CDAD. A, CDAD with aneurysmal degeneration of the FL. Stand-alone endograft deployment in the TL will likely be associated with persistent retrograde filling of the FL (hairpin arrows). B, DLZO is performed at the levels of the visceral and supravisceral aorta (dashed oval). Proximal seal zone optimization was also accomplished with subclavian–carotid transposition (short arrow). C, Endograft deployment with balloon molding to allow the distal end the endograft to accomplish seal. The Journal of Thoracic and Cardiovascular Surgery 2019 157, 88-98DOI: (10.1016/j.jtcvs.2018.06.095) Copyright © 2018 The American Association for Thoracic Surgery Terms and Conditions

Figure 2 “Squeegee” wire fenestration technique. Essentially a controlled version of “cheese cutter” wire-pull fenestration. Two adjacent point fenestrations are placed at the desired location in the intended distal landing zone. The fenestrations are balloon dilated and a thin, kink-resistant guide wire is snared across the intervening septum between the 2 point fenestrations through a common sheath or guide catheter. The sheath or catheter is then advanced over the 2 wires (blue forward arrow) while firm pulling force is applied to the 2 ends of the wire (black arrows). A controlled wire slicing effect is produced by incrementally synching the septum between the 2 point fenestrations into a coalesced large fenestration. The Journal of Thoracic and Cardiovascular Surgery 2019 157, 88-98DOI: (10.1016/j.jtcvs.2018.06.095) Copyright © 2018 The American Association for Thoracic Surgery Terms and Conditions

Figure 3 DLZO to enable distal seal before endograft exclusion of FL aneurysm in a patient with CDAD and progressive degeneration. A, A 68-year-old man with a history of endovascular aortic repair of ATBAD with coverage of the primary proximal tear 6 months previously presenting with back pain and enlarging FL aneurysm. CTA shows persistent retrograde filling of the FL via multiple re-entry points at the levels of the distal thoracic and visceral aorta. A distinct fibrotic septum is present (arrow), extending across the entire thoracoabdominal aorta into the iliac bifurcation, which precludes adequate exclusion of the aneurysm with stand-alone endograft deployment in the TL. Distal end of the stent-graft remains confined to the TL and has not fully expanded. B, Sharp puncture across the septum using a Chiba microneedle (short arrow) guided through a directional metallic cannula (long arrow). A 0.018” nitinol guide wire is passed to establish access into the FL. Serial balloon dilatation was performed beginning with a 6-mm microballoon. The microwire was exchanged for a heavy-duty 0.035” guide wire over which definite large balloon fenestration was performed. C, Final appearance after DLZO and distal extension using a CTAG endoprosthesis (GORE) (arrows), and an adjunct FL occlusion using a large vascular plug. Balloon molding was needed to overcome the septal remnants and ensure complete apposition of the stent-graft to the optimized aortic wall. D, Follow-up CTA 3 months later demonstrating complete thrombosis of the FL with good distal seal. Also seen is the AMPLATZER plug that was placed in the FL to promote thrombosis. The Journal of Thoracic and Cardiovascular Surgery 2019 157, 88-98DOI: (10.1016/j.jtcvs.2018.06.095) Copyright © 2018 The American Association for Thoracic Surgery Terms and Conditions

Figure 4 A 62-year-old patient with CDAD presenting with an extent-III thoracoabdominal aneurysm, extending into the right iliac bifurcation. A, CTA reconstruction showing a fibrotic septum across the visceral aorta extending to the level of the distal right common iliac artery with a large reentry tear at that level (arrow). B, Broad-based DLZO was performed followed by 4-vessel SMFSG repair, extended proximally with a thoracic aortic endograft. C, Residual retrograde filling at the level of the right common iliac artery bifurcation was excluded with an AMPLATZER plug (arrow). The Journal of Thoracic and Cardiovascular Surgery 2019 157, 88-98DOI: (10.1016/j.jtcvs.2018.06.095) Copyright © 2018 The American Association for Thoracic Surgery Terms and Conditions

Figure 5 Lack of seal can be due to a short seal segment and/or insufficient apposition due to undersized endograft or inadequate balloon molding. A, A serious deleterious consequence of insufficient seal after DLZO is exaggerated pressurization of the FL, resulting in a high-resistance/high-flow pattern, which may promote accelerated sac growth. B, Example of accelerated sac growth after DLZO in a patient with residual T1BEL at the end of the index procedure. Although good graft apposition is achieved across a 10-mm seal segment length, there is a faint T1BEL (arrow). C, This patient developed recurrent symptoms 3 months later, and a CTA was obtained showing unimpeded flow into the FL and >15-mm increase in sac diameter. Angiogram before repeat DLZO and distal extension showed considerable widening of the gap between the endograft and aortic wall and extensive retrograde filling of the FL aneurysm (hairpin arrow). The patient underwent repeat DLZO, allowing adequate seal distal to the aneurysm with thrombosis of the aneurysm and resolution of the symptom. The Journal of Thoracic and Cardiovascular Surgery 2019 157, 88-98DOI: (10.1016/j.jtcvs.2018.06.095) Copyright © 2018 The American Association for Thoracic Surgery Terms and Conditions

Decompartmentalization of the aorta at the intended distal landing zone enables treatment. The Journal of Thoracic and Cardiovascular Surgery 2019 157, 88-98DOI: (10.1016/j.jtcvs.2018.06.095) Copyright © 2018 The American Association for Thoracic Surgery Terms and Conditions

Video 1 Balloon molding of the distal end of the endograft is an essential component of distal landing zone optimization to overcome the disrupted septal remnants and enable secure apposition across the seal zone. Shown here is an example using a Tri-Lobe balloon (GORE). Video available at: https://www.jtcvs.org/article/S0022-5223(18)32028-2/fulltext. The Journal of Thoracic and Cardiovascular Surgery 2019 157, 88-98DOI: (10.1016/j.jtcvs.2018.06.095) Copyright © 2018 The American Association for Thoracic Surgery Terms and Conditions

Video 2 Detailed description of the procedure in a patient in whom the landing zone was located in the distal aorta, necessitating fenestrated endograft repair. Video available at: https://www.jtcvs.org/article/S0022-5223(18)32028-2/fulltext. The Journal of Thoracic and Cardiovascular Surgery 2019 157, 88-98DOI: (10.1016/j.jtcvs.2018.06.095) Copyright © 2018 The American Association for Thoracic Surgery Terms and Conditions