Thoracoabdominal Aneurysm Research Articles

Impact Of Preoperative Risk Factors On 5-year Survival After Fenestrated/Branched Endovascular Aortic Repair

To investigate which preoperative factors most impact the 5-year survival of patients undergoing fenestrated/branched endovascular aortic repair (F/BEVAR) and to identify modifiable elements that, if time allows, should be actively managed and adequately controlled preoperatively. Patients treated for aortic aneurysms with complex anatomy using either a patient-specific company manufactured or an off-the-shelf F/BEVAR devices were included. The exposure of interest was aneurysm type (group I: types I-III thoracoabdominal aneurysms (TAAA) vs group II: type IV TAAA vs group III: juxtarenal or suprarenal aneurysms) and the primary outcome was 5-year risk of all-cause mortality. Generalized linear models were used to estimate each group's crude 5-year risk of death and the 5-year risk of death across groups. Each preoperative factor was added to the model individually and a change in estimate was calculated between the new risks and the crude risk. Preoperative factors with a change of estimate of ≥10% were utilized to create an inverse probability of treatment weights for multivariable analysis. Results: 408 F/BEVAR patients were included, who were 71.6% male (mean age: 72.0±7.9 years). Eleven of the 22 preoperative factors analyzed had a change in estimate ≥10%. The greatest changes in estimates were observed for history of congestive heart failure (CHF), arrhythmia, overweight, obesity, COPD. Almost 60% of patients with CHF in group I died within 5 years. Current smoking or overweight at the time of F/BEVAR increases the 5-year risk of death more significantly than having a history of myocardial infarction. After adjustment, patients in group I had a significantly higher risk of 5-year all-cause mortality compared to those in group III (log-rank p-value=0.0082). The present findings suggest that cardiac arrhythmias, CHF, overweight, obesity, COPD, and aneurysm diameter above 7 cm are the most relevant preoperative elements that impact the 5-year survival post F/BEVAR. More specifically, CHF and arrhythmias should be used to alter patient selection and identify those individuals more likely to benefit from repair. Moreover, modifiable risk factors such as weight loss and smoking cessation during the surveillance period before the F/BEVAR procedure, might improve survival in this population. Considering that preoperatively, many patients are periodically evaluated by a vascular surgery team until the aneurysm diameter meets criteria for repair, a multidisciplinary approach that could address these modifiable risk factors might be an impactful strategy.

The impact of large aneurysm diameter on the outcomes of thoracoabdominal aneurysm repair by fenestrated and branched endografts.

Aim of the study was to analyze the impact of preoperative thoraco-abdominal aneurysm diameter on the outcomes of fenestrated/branched endografting. Patients underwent endovascular thoraco-abdominal repair at 2 European centers (2011-2021) were analyzed. Median diameter was calculated; third quartile was considered as cut-off. Outcomes were compared in two groups based on the diameter value. Primary end-points were technical success, spinal cord ischaemia and 30-day/in-hospital mortality. Survival, freedom-from-reintervention and target-visceral-vessels instability were follow-up outcomes. Out of 247 thoraco-abdominal aortic aneurysms, the median diameter was 65 mm, first quartile was 57 mm; third quartile was 80 mm, set as cut-off value. Fifty-nine(24%) patients had diameter ≥80mm. Custom-Made and off-the-shelf branched endograft were used in 160(65%) and 87(35%), respectively. Technical success was 93% (<80mm : 91% vs ≥80mm : 94%; P:0.47). Twenty-three(9%) patients had spinal injury (<80mm : 7% vs ≥80mm : 17%; P:0.03). Twenty-two(9%) patients died within 30-day/in-hospital (<80mm : 7%; vs ≥80mm : 15%; P:0.06). Multivariate analysis did not report pre-operative diameter ≥80mm as significant risk factor for primary end-points. The median follow-up was 13 (interquartile-range : 2-37) months and at 3-years survival and freedom from reintervention rates were 65% and 62%, respectively. After univariate and multivariate analysis preoperative diameter ≥80mm was considered an independent risk factor for reinterventions (HR : 1.9; 95% CI : 1.1-3.6; P:0.04), and for target visceral vessels instability (HR : 3.1; 95% CI : 1.3-5.1; P:0.04), occurred in 45(18%) cases. However after competing risk methods preoperative diameter did not show significance for follow-up results. A pre-operative thoraco-abdominal aortic aneurysm diameter greater than 80 mm has not a direct impact on early technical and clinical outcomes. Diameter ≥80mm is considered risk-factor for reinterventions and target-vessels instability considered separately during follow-up.

Custom-Made Device (CMD) for the Repair of Thoraco-Abdominal Aneurysm (TAA): Mid-Long Term Outcomes from a Single Southeast Asian Centre Experience in Singapore.

Introduction: Given the high risk of peri-operative morbidity and mortality associated with open repair, endovascular repair for thoraco-abdominal aneurysms is increasingly performed. This study aims to describe mid to long-term results for patients who were treated with COOK Custom-Made Endograft Device at a single Southeast Asian tertiary centre. Methods: Mid to long-term results of patients treated from 2012 to 2022 were retrospectively reviewed. Indications for treatment were aortic diameter > 5.5 cm, enlargement > 5 mm in 6 months or high-risk morphology. Clinical, operative, early to late complications and reintervention details were captured. The endpoints were technical success, primary patency and primary assisted patency. Results: Electronic medical records of 29 consecutive patients (64.4 ± 1.6 years old; 26/29 males 89.6%) were reviewed. 24/29 (83%) were hypertensive, and 20/29 (69%) were smokers. The mean diameter was 5.5 cm, and the majority were treated for Crawford type IV (19/29, 65.5%). Endograft deployment was 100%. Catheterisation of fenestration was successful in 109/116 (94%). 30-day mortality and morbidity were observed in 12/29 (41%), for which access site complications were most common. No significant haemorrhage or graft explant was recorded. The mean follow-up period was 32.4 months (range 1-108 months). Primary patency was 92.9% (95% CI: 83.8-100.0) at 6 months and decreased to 77.7% (95% CI: 63.4-95.2) at 24 months. Sac shrinkage or stability was noted in 17/29 (58.6%). Re-intervention was performed in 9/29 (31%) for limb occlusion (2/9, 22.2%), renal artery stent occlusion (1/9, 11.1%) and endoleaks (6/9, 66.6%). Assisted patency was maintained at 100% for 12 months before decreasing to 66.7% (95% CI: 37.9-100.0) at 24 months. Conclusions: The study reports the first mid-long-term result in this region, though limited by the sample size. Re-intervention at 30% suggests that disease and procedures remain challenging, emphasising the need to assimilate lessons and experience at high-volume centres.

Women Experience Higher Rates of Mortality Following Thoracic Endovascular Aneurysm Repair

ObjectivesThoracic endovascular aortic repair (TEVAR) and complex endovascular thoraco-abdominal aneurysm repair (cEVAR) has been increasingly adopted in the treatment of thoracic and thoracoabdominal aorta aneurysms, offering a less invasive approach for patients with appropriate anatomy. Women usually present with smaller aortic diameter. However, they usually have greater aneurysm growth rates. How sex can affect postoperative and short-term outcomes after TEVAR is not well reported. The aim of this study was to assess outcomes in female versus male patients undergoing TEVAR for treatment of thoracic and thoracoabdominal aneurysms in a Medicare-linked database. MethodsWe retrospectively reviewed patients undergoing TEVAR for thoracic and thoracoabdominal aneurysm repair in the Vascular Quality Initiative (VQI) Vascular Implant Surveillance and Interventional Outcomes Network (VISION) database from 2003 to 2018. Patients were divided into males and females. Patients presented with ruptured aneurysm were excluded from the analysis. Postoperative outcomes included in-hospital stroke, myocardial infarction (MI), spinal cord ischemia, and 30-day mortality. One-year outcomes included mortality, aneurysmal rupture, and reintervention. Postoperative outcomes were assessed using multivariable logistic regression analysis and one-year outcomes were evaluated using Kaplan Meier Survival and Cox regression analyses. ResultsA total of 3,058 males and 1,843 females were available for the analysis. Female patients had smaller median aortic diameter, were more likely to be black, with chronic obstructive pulmonary disease, and chronic kidney disease, and to be symptomatic on presentation. Male patients were more likely to be on preoperative medications such as aspirin, beta-blockers, angiotensin-converting enzyme inhibitors, P2Y12 antagonists, and anticoagulants. After adjusting for potential confounders, female gender was associated with double the risk of in-hospital stroke (OR: 2.3, 95%CI ((1.5-3.7), P<0.001) and 80% increase in 30-day mortality (OR: 1.8, 95%CI (1.3-2.6), P=0.001). At one year, female gender was associated with a higher risk of mortality (HR: 1.2, 95%CI (1.05-1.4), P=0.011). There was a trend towards higher risk of reintervention (HR: 1.2, 95%CI (0.97-1.6), P=0.079). ConclusionsMortality after TEVAR seems to be higher in female patients at 30 days and up to one year of follow-up. Female patients also face a two times higher risk of in-hospital stroke. Future studies with a larger female population should aim to identify and potentially ameliorate the factors associated with these unfavorable outcomes in females.

Hybrid Surgical treatment of thoraco-abdominal aneurysm: case report

The conventional surgical treatment of TAAA is complex and is associated with important perioperative mortality and mobidity. There is consensus that endovascular aneurysm repair (EVAR) is the preferred treatment for high-risk patients, but the availability of endovascular-branched grafts are quite limited. As an alternative for such dilema, the hybrid approach came as another possibility for high risk patients where totally endovascular treatment is not feasible and clinical condition for convencional surgery is prohibitive. Thus, the objective of this study is to report our service's experience with the hybrid surgical technique for treatment of this severe condition. Male patient, 73 years old, diagnosed with fusiform aortic aneurysm at the thoracoabdominal transition level, measuring 10.1 x 8.9 cm, associated with a large retroperitoneal hematoma, likely corresponding to an aneurysm rupture. The hybrid strategy was chosen, involving two stages: conventional surgery and endovascular procedures. However, approximately 24 hours after the first surgery the patient had refractory cardiac arrest at intensive care unit. Surgical treatment of thoracoabdominal aneurysm is a complex issue, and the trend over time is tending toward total endovascular treatment, and these devices will undoubtedly evolve and be used more and more in the years to come. However, the hybrid repair will likely remain a standard procedure for a while, until total endovascular procedures become more common and the necessary endovascular materials widely available.

Operative Times and Outcomes of Complex Endovascular Repairs of Thoracoabdominal Aneurysms

IntroductionOwing to the significant morbidity and mortality of open thoracoabdominal aortic aneurysm surgery, complex endovascular repairs (eTAAA) have become increasingly common, but still carry substantial risk. These repairs require large bore access, with resultant pelvic and lower extremity ischemia. We therefore hypothesized that operative timing would be associated with outcomes, as efficient surgery would limit the ischemic time as well as anesthesia time. MethodsWe studied all eTAAA repairs (Crawford Types 1-3, 5) incorporating at least one branch vessel from 2014 to 2021 in the Vascular Quality Initiative, and categorized them into quartiles of total operating time. To account for variations in case complexity and intraoperative events, we performed a sub-analysis stratifying each surgeon by their median operating time. Multilevel logistic regression was employed to compare perioperative outcomes including mortality, thoracoabdominal life altering events (TALE:composite of perioperative death, stroke, permanent paralysis and/or dialysis), spinal cord ischemia (SCI), acute kidney injury (AKI), major adverse cardiac events (MACE), myocardial infarction, and dialysis. ResultsThere were 2,925 eTAAA repairs during the study period. Procedure times ranged from <204 minutes in the first quartile to >365 minutes in the fourth. Longer cases more commonly involved older patients who were more often female, and higher rates of prior stroke, and preoperative anemia. They involved larger, more extensive aneurysms, with higher rates of prior aortic surgery, and more commonly employed PMEGs or parallel grafting to incorporate more branch vessels. In addition, they were less often staged procedures, and used more spinal drains, femoral cutdowns, and upper extremity access. Operating time decreased as experience increased. In adjusted analyses, the odds of mortality and every morbidity studied increased stepwise with operating time, with 4 to 13-fold higher odds in the highest quartiles. Spinal cord ischemia had the strongest association with procedure times, with seven-fold higher odds (OR 7.2 [2.9-17.9], P<.001) of any SCI in the highest quartile compared to the lowest, and 13-fold higher odds of permanent SCI (OR 13.1 [3.9-44.7], P<.001). These results were consistent when surgeons were grouped into quartiles by their median operating times. Medium-term mortality was also higher in the upper quartile of operating time (HR 2.7 [1.4-5.1], P=.002). ConclusionLonger operating times for complex eTAAA repairs were associated with markedly higher rates of morbidity and mortality, especially spinal cord ischemia. These results emphasize the importance of expeditious repairs by experienced teams.

Early Results of Fenestrated and Branched Endovascular Repair of Complex Aortic Aneurysms with a Custom-made National Device Available in the Brazilian Public Health System

BackgroundMulticenter studies conducted in developed countries demonstrated that custom-made devices are safe, effective, and durable for treating complex abdominal aneurysms. However, the situation in developing countries, such as Brazil, is different. Funding and time to have the endoprosthesis delivered are the major concerns. In order to overcome these conditions, high-volume Brazilian university hospitals started gaining experience with a custom-made device produced in the country. ObjectiveThe present study aimed to describe the practice of two tertiary centers and report the early results of fenestrated and branched endovascular repair of complex aortic aneurysms with a custom-made national device available in the Brazilian public health system. MethodsRetrospective analysis of all consecutive patients that underwent F/BEVAR of complex aortic aneurysms using custom-made manufactured endoprosthesis in two tertiary centers from January 2020 to July 2022. ResultsThirteen cases were included (10 male, mean age 69 ± 9 years). 70 % were complex abdominal aneurysms, and 30% were type II, III and IV thoracoabdominal aneurysms (mean aneurysm diameter 69.2 ± 8.12 mm). F/BEVAR included 33 visceral arteries. The Apolo® device was used in all cases. Technical success was achieved in 12 out of 13 patients (92.3%). Thirty-day major adverse events included one death (7.7%), five acute renal failure (38.4%), two spinal cord ischemia (15.4%). The one-year survival rate was 92.3%. ConclusionFenestrated and branched endovascular repair of complex aortic aneurysms with the custom-made Apolo® device has proven safe and effective in high-volume tertiary centers in the Brazilian public health system. Considering the complexity of the cases, the early patency of vessels and low initial mortality support this device continuation and expansion to treat complex aortic aneurysms in a developing country.

A Prevention Protocol Reduces Spinal Cord Ischemia in Patients Undergoing Branched/Fenestrated Endovascular Aortic Repair

ObjectivesSpinal cord ischemia (SCI) is a devastating complication that is associated with thoracoabdominal aortic repair, with higher risk associated with increased aortic coverage length, making patients undergoing branched/fenestrated endovascular repair(B/FEVAR) particularly vulnerable. A bundled SCI prevention protocol was previously reported to reduce SCI rates when compared to a historic cohort in a single-center study. Therefore, this analysis aims to further validate and update outcomes associated with the protocol given the routine implementation of this strategy at two institutions (University of Florida [UF] and the University of Alabama at Birmingham [UAB]) since inception. MethodsComponents of the SCI prevention protocol include selective cerebrospinal fluid (CSF) drainage, specified blood pressure parameters, transfusion goals, and selective pharmacologic adjuncts (naloxone, steroids). This protocol was routinely implemented in May 2015. Patients undergoing B/FEVAR from May 2015-December 2022 constituted the post-protocol cohort(n=402) and were compared to the pre-protocol cohort (n=160, January 2010-April 2015). The primary outcome was SCI incidence and subgroup analysis was conducted among patients deemed to be high-risk (Crawford extent I- III thoracoabdominal aneurysms (TAAA) dissection-related disease, prior aortic repair, coverage proximal to zone 5). Survival analysis was performed using Kaplan-Meier methodology. ResultsThe pre- and post-protocol cohorts were demographically similar, though more post-protocol patients were American Society of Anesthesiology(ASA) class IV (86.1% vs. 55.0%; p<0.001). TAAA was the most common indication in both groups. CSF drain placement was more common in the post-protocol group, particularly among high-risk patients. SCI occurred in 15.9% of pre-protocol patients versus 3.0% of post-protocol patients(p<0.001). In high-risk patients, the pre- and post-protocol cohort SCI incidence was 23.2% vs. 5.0%, respectively (p<0.001). 30-day mortality was decreased in the post-protocol cohort (6.3% vs. 2.2%, p=0.02). Although the post-protocol group had a trend toward improved 1-year survival, this was not statistically significant (84.4% vs. 88.3%, log-rank p=0.35). Among SCI patients, one-year mortality was 28% and 33.3% in the pre- and post-protocol groups, respectively(p=0.46). ConclusionImplementation of a bundled SCI prevention protocol significantly reduces SCI rates in B/FEVAR patients, which has now been validated at two institutions, with the most significant reductions occurring among high-risk patients. Although the overall one-year mortality difference was not significantly different between the cohorts, the high mortality rates among SCI patients highlights the importance of preventative measures.

Like Father like Daughter: Surgical Redo Thoracoabdominal Aneurysm Repairs in a Family With Loeys-Dietz Syndrome.

Loeys Dietz Syndrome (LDS) is an autosomal dominant connective tissue disorder resulting from a mutation in the transforming growth factor beta receptor (TGFBR) family of genes. It is commonly associated with the development of aortic aneurysms and dissections. We report the successful open surgical management of thoracoabdominal aneurysms in a father and daughter with Loeys-Dietz Syndrome after failed endovascular repair. The daughter required stent graft explantation, while the stent graft remained in the father. These cases highlight the importance of early genetic testing of both patients and first-degree family members in those with a strong history of aortic disease, even when there is a lack of typical connective tissue disorder associated physical exam findings and open surgical index operations.

Effect of Chronic Kidney Disease on 30-Day Outcomes in Endovascular Repair of Complex Abdominal Aortic Aneurysm.

Chronic kidney disease (CKD) has been identified as an independent predictor of poorer long-term prognosis after endovascular aneurysm repair (EVAR) for complex abdominal aortic aneurysm (AAA). However, its impact on short-term perioperative outcomes is conflicting, which can be important for preoperative risk stratification. This study aimed to evaluate the 30-day outcomes of patients with CKD following non-ruptured complex EVAR in a national registry. Patients who had EVAR for complex AAA were identified in ACS-NSQIP targeted database from 2012-2022. Complex AAA included juxtarenal, suprarenal, or pararenal proximal extent, Type IV thoracoabdominal aneurysm, and/or aneurysms treated with Zenith Fenestrated endograft. Exclusion criteria included age<18years, ruptured AAA, acute intraoperative conversion to open, emergency presentation, and dialysis. Multivariable logistic regression was used to compare 30-day postoperative outcomes of CKD and non-CKD patients, where demographics, baseline characteristics, aneurysm diameter, distant aneurysm extent, anesthesia, and concomitant procedures were adjusted. There were 695 (39.33%) and 1072 (60.67%) patients with and without CKD, respectively, who underwent EVAR for complex AAA. Patients with and without CKD have comparable 30-day mortality (aOR = 1.165, 95 CI = 0.646-2.099, P = 0.61). However, CKD patients had a higher risk of renal complications (aOR = 2.647, 95 CI = 1.399-5.009, P < 0.01) including higher progressive renal insufficiency (aOR = 3.707, 95 CI = 1.329-10.338, P = 0.01) and acute renal failure requiring renal replacement therapy (aOR = 2.533, 95 CI = 1.139-5.633, P = 0.02). All other 30-day outcomes were comparable between CKD and non-CKD patients. Patients with CKD had similar 30-day mortality and morbidity rates but a higher risk of postoperative renal complications. Therefore, meticulous preoperative planning and postoperative management, which may include optimal hydration, appropriate contrast use, and close renal function monitoring, are essential for patients with CKD after complex EVAR.

Outcomes of Deep Hypothermic Circulatory Arrest for Descending and Thoracoabdominal Aneurysm Repair

ObjectiveDeep hypothermic circulatory arrest (DHCA) in patients undergoing descending (DTAA) or thoracoabdominal aortic aneurysm (TAAA) repair is associated with increased morbidity and mortality. We present our outcomes after open DTAA and TAAA repair with and without DHCA. MethodsFrom 1999 to 2022, 81 (38.8%) patients undergoing DTAA or TAAA repair required DHCA because proximal cross-clamping was not feasible or aneurysmal pathology extended into the arch and 128 (61.2%) patients required only distal bypass. Because of intrinsic pathological differences in patients requiring DHCA, confidence intervals were used to compare groups in lieu of formal hypothesis tests. ResultsDHCA patients had more chronic dissections (64.2% vs 43.8%, 95% CI for difference: 6% - 35%) and higher BMIs (29.5 ± 6.8 vs 27.2 ± 6.6, CI: 26% - 421%). More non-DHCA patients had medial degeneration (9.9% vs 31.3%, CI: -33% - -7%). There were 10 (12.4%) in-hospital deaths for the DHCA and 10 (7.8%) for the non-DHCA group (CI: -5% - 14%). Survival at 10 years was 52.6% (CI: 42.1%-65.7%) for the non-DHCA group and 48.3% (CI: 40.3%-57.9%) for the DHCA group. The only meaningful differences in postoperative outcomes were ICU (5.5 days vs 6 days, CI: 12%-410%) and hospital stay (19 days vs 12 days, CI: 74%-470%), which were longer in the DHCA group. ConclusionsDespite longer ICU and hospital length of stays, selective use of DHCA is safe and effective with comparable morbidity and mortality to non-DHCA in open DTAA and TAAA repair.

Safety of adjuvant open axillary access during complex thoracoabdominal aortic endovascular procedures.

Endovascular treatment of aortic diseases with complex anatomy may require an additional upper extremity arterial access (like axillary access) for support during aortic navigation and allowing the use of larger sheaths for thoracoabdominal antegrade access. The objective of this study is to evaluate the safety of the open axillary approach as adjuvant access in complex thoracoabdominal aortic endovascular interventions. A monocentric retrospective study was performed, including all patients with a complex aortic endovascular procedure (fEVAR, bEVAR, chEVAR or TEVAR), elective or urgent, with open surgical exposure of the axillary artery as adjuvant access, between 2012 and 2022. Demographic data, diagnosis and urgency criteria, type of aortic intervention, size of axillary sheath, use of through-and-through maneuver, and features by computed tomography angiography (CTA) of the axillary artery and aortic arch were recorded. The appearance of local and aortic postoperative complications were described, and possible prognostic factors were analyzed. Forty-eight patients (38 men) were included, median age 78 years (range 50-87), 33 with intact thoracoabdominal aneurysms, eight previous EVAR endoleaks and seven aortic aneurysm ruptures. 28 fEVAR/bEVAR, 17 chEVAR and three TEVAR procedures with axillary access were performed. Left infraclavicular axillary access was the most common approach (94%), along with a 12 French (F) median sheath (range 7-20). Eight (16.7%) local complications were identified: three bleedings, one hematoma, three focal dissections in the subclavian artery, and one brachial embolism, all successfully resolved. The only factor related to local complications was small axillary diameter (median 10.7 vs. 14.6 mm; P<0.001), a subclavian/sheath ratio less than one was associated to more local complications (P=0.02). Regarding aortic complications, two (4.1%) type B asymptomatic aortic dissections with left juxta-subclavian tear were found, attributed to local manipulation, occurring only in urgent procedures (P=0.032). The use of open axillary access as an adjuvant approach in complex aortic endovascular surgery, although it is very useful and usually safe, can be associated with subclavian or even aortic complications (not reported until now), especially in cases with small subclavian diameters and urgent cases.

Physician-Modified Endografts for Repair of Complex Abdominal Aortic Aneurysms: Clinical Perspectives and Medico-Legal Profiles.

Standard endovascular aortic repair (EVAR) has become the standard of care for treating infrarenal abdominal aortic aneurysms (AAAs) in patients with favorable anatomies, while patients with challenging AAA anatomies, and those with suprarenal or thoraco-abdominal aneurysms, still need alternative, more complex, solutions, including custom-made branched or fenestrated grafts, which are constrained by production delay and costs. To address urgent needs and complex cases, physicians have proposed modifying standard endografts by manually creating graft fenestrations. This allows for effective aneurysm exclusion and satisfactory patency of visceral vessels. Although physician-modified grafts (PMEGs) have demonstrated high technical success, standardized creation processes and long-term safety data are still lacking, necessitating further study to validate their clinical and legal standing. The aim of this article is to illustrate the state of the art with regard to this surgical technique, summarizing its origin, evolution, and the main clinical evidence supporting its effectiveness. The paper also aims to discuss the main medico-legal issues related to the use of PMEGs, with particular reference to the issue of safety related to the standardization of the surgical technique, medical liability profiles, and informed consent.

Commentary on cerebrospinal fluid drain pilot study in high-risk fenestrated/branched endovascular aneurysm repair of thoracoabdominal aneurysm repair

Commentary on cerebrospinal fluid drain pilot study in high-risk fenestrated/branched endovascular aneurysm repair of thoracoabdominal aneurysm repair

Technical Aspects and Outcome of Multi-Staged and Single-Staged Thoracoabdominal Fenestrated Endovascular Aortic Repair.

In some cases of endovascular thoracoabdominal or juxtarenal aortic aneurysm repair, a thoracic endograft in combination with a fenestrated renovisceral device may be needed in order to create a sufficient proximal landing zone. This study aimed to evaluate the technical aspects and postoperative morbidity of a single- or 2-stage approach. Eighty-seven consecutive patients undergoing thoracic endovascular aortic repair (TEVAR) in combination with elective fenestrated repair (fenestrated endovascular aortic repair [FEVAR]; fenestrated Anaconda device) from 2015 to 2022 were included in this retrospective bicentric study. Underlying pathologies, aortic morphology, technical details, and postoperative morbidity were recorded. Single-staged ("1S," n=61) and 2-staged ("2S," n=26) interventions were compared. Indications were thoracoabdominal aneurysms (TAAAs) (Crawford I-IV) (n=56, 64%) and juxtarenal aneurysms (n=31, 36%). In 2S, the proportion of TAAA was higher than in 1S (2S: 77%, 1S: 59%; p=0.001). In 2S, the covered length of the descending aorta was longer (1S: 128±60 mm, 2S: 202±64 mm; p=0.003). Temporary aneurysm sack perfusion (TASP) was established in 11 (18%) of 1S and 1 (4%) of 2S patients (p=0.079), as well as cerebrospinal fluid (CSF) drainage catheter in 48 (79%) of 1S and 19 (73%) of 2S. The rate of spinal cord ischemia (SCI) and the severity of SCI were not different in both groups, with a total of 3 cases of persisting paraplegia. The rate of access complications was higher in 2S (n=6, 23%) than in 1S (n=4, 7%; p=0.027). Postoperative 30 day morbidity did not significantly differ in both groups and neither did 30 day mortality (4.6% in 1S vs 3.8% in 2S; p=0.083). The combination of TEVAR and FEVAR using a fenestrated endograft is feasible and safe. Aortic morphology does not change significantly after endovascular repair. A single-staged strategy is feasible with excellent results, especially in Crawford IV, Crawford V, or juxtarenal aneurysms. Two-staged repair is recommended in cases with long aortic coverage and a higher American Society of Anesthesiologists (ASA) class. Follow-up data are needed to evaluate the long-term stability of the TEVAR/FEVAR interconnection. Our study has revealed the safety and efficacy of the combination of TEVAR and FEVAR in the treatment of TAAAs and juxtarenal aneurysms with compromised supravisceral landing zones. A single-staged concept is not necessary in all cases. Staged procedures may reduce postoperative morbidity in cases with long aortic coverage and higher ASA class.

Intestinal Fatty Acid–Binding Protein as a Potential Biomarker for Gastrointestinal Complications after Complex Endovascular Aortic Surgery

This study aimed to investigate the association between intestinal fatty acid-binding protein (I-FABP), acute gastrointestinal injury (AGI) grade, and gastrointestinal (GI) complications after fenestrated or branched endovascular aortic aneurysm repair. A total of 17 patients undergoing endovascular aortic repair for thoracoabdominal, juxtarenal, suprarenal, or pararenal aneurysm between May 2017 and September 2018 were enrolled. Blood samples were collected preoperatively and during postoperative intensive care. The blood samples were analyzed for I-FABP with enzyme-linked immunosorbent assay. Gastrointestinal function was assessed according to the AGI grade every day during postoperative intensive care. Higher concentrations of I-FABP at 24hr and 48 hr correlated to higher AGI grade on postoperative days 1, 2, and 3 (P=0.032 and P=0.048, P=0.040 and P=0.018, and P=0.012 and P=0.016, respectively). Patients who developed a GI complication within 90days postoperatively had a higher overall AGI grade than those who did not develop a GI complication (P<0.001), as well as higher concentrations of I-FABP at 48 hrs (P=0.019). Patients developing GI dysfunction (AGI grade ≥2) had a higher frequency of complications (P=0.009) and longer length of stay in the intensive care unit (P=0.008). In patients undergoing endovascular aortic repair for complex aneurysm increased postoperative plasma I-FABP concentrations and postoperative GI dysfunction, evaluated using the AGI grade, were associated with GI complications, indicating that these measures may be useful in the postoperative management of these patients.

In-situ repair of a mycotic thoracoabdominal aortic aneurysm caused by MRSA bacteremia using cryopreserved artery and autogenous vein

Mycotic aortic aneurysm (MAA) is a rare disease process associated with high morbidity and mortality, especially if left untreated. Currently, there is no consensus on optimal management for MAA but early diagnosis is vital for improving chances of survival. Treatment with antibiotics is recommended followed by surgical repair. We present the unique case of a 33-year-old male who presented with a mycotic thoracoabdominal aneurysm that was treated via open in-situ repair with cryopreserved artery, celiac and superior mesenteric artery bypasses, and ligation of bilateral renal arteries. The patient subsequently underwent a successful kidney transplant several years later and currently remains dialysis free. CT imaging at 1-year and 5-years demonstrated patent bypasses without evidence of re-infection or aneurysmal changes to the cryopreserved arterial graft. This case underscores the myriad of challenges associated with managing MAA, while also presenting the opportunities to surmount these challenges through a personalized and multidisciplinary treatment approach.

Prior abdominal surgery is not associated with 30-day mortality or morbidities after endovascular repair of complex abdominal aortic aneurysm.

Prior abdominal surgery (PAS) has the potential to affect outcomes of abdominal aortic aneurysm (AAA) repair. Recently, endovascular aneurysm repair (EVAR) has been expanded among patients with complex AAA, which involves visceral branches in the upper abdominal aortic. However, outcomes of EVAR for complex AAA in patients with PAS have not been examined. This study aimed to investigate the impact of PAS on 30-day outcomes in EVAR for complex AAA. Patients who underwent EVAR for complex AAA were identified in ACS-NSQIP targeted database from 2012 to 2022. Complex AAA was defined as juxtarenal, suprarenal, or pararenal proximal extent, Type IV thoracoabdominal aneurysm, or aneurysms treated with Zenith Fenestrated endograft. Patients with age less than 18 years, ruptured AAA with or without hypotension, acute intraoperative conversion to open, and emergency presentation were excluded. Multivariable logistic regression was used to compare 30-day postoperative outcomes of patients with and without PAS. Demographics, baseline characteristics, aneurysm diameter, indication for surgery, proximal and distant aneurysm extent, anesthesia, and concomitant procedures were adjusted. There were 515 (28.34%) and 1302 (71.66%) patients with and without PAS, respectively, who underwent EVAR for complex AAA. Patients with and without PAS had comparable 30-day mortality (3.11% vs 3.00%, aOR = 0.766, 95 CI = 0.407-1.442, p = .41). Organ system complications including cardiac complications, stroke, pulmonary complications, and renal complications were comparable between patients with and without PAS. All other 30-day outcomes were similar between groups. However, patients with PAS had higher 30-day readmission rate (11.65% vs 7.14%, aOR = 1.634, 95 CI = 1.145-2.331, p = .01). While PAS has high prevalence among patients undergoing EVAR for complex AAA, it does not impact 30-day mortality and morbidities. Thus, EVAR for complex AAA can be considered safe for patients with PAS in terms of short-term outcomes, despite the long-term prognosis in these patients being needed in further studies.

Use of the Gore Thoracic Branched Endoprosthesis in Combination With Branched/Fenestrated Physician-modified Endografts in the Treatment of Extent I and II Thoracoabdominal Aneurysms

Use of the Gore Thoracic Branched Endoprosthesis in Combination With Branched/Fenestrated Physician-modified Endografts in the Treatment of Extent I and II Thoracoabdominal Aneurysms

Post-dissection Thoraco-abdominal Aortic Aneurysm Managed by Fenestrated or Branched Endovascular Aortic Repair

Fenestrated or branched endovascular aortic repair (F/B-EVAR) is a valuable treatment in patients with chronic post-dissection thoraco-abdominal aneurysm (PD-TAAA). This study aimed to analyse early and follow up outcomes of F/B-EVAR in these patients. Thirty day and follow up outcomes of consecutive patients with PD-TAAA treated with F/B-EVAR in a tertiary centre over eight years were analysed retrospectively. All patients presenting with PD-TAAA and managed with F/B-EVAR were eligible. A modified Crawford's classification system was used. Thirty day mortality and major adverse event (MAE) rates were analysed. Time to event data were estimated with Kaplan-Meier survival analysis. Fifty five patients (80% men, mean age 63.7 ± 7.7 years) were included: 12 (22%) were managed urgently; 25 (46%) for chronic type B aortic dissection; and the remainder for residual type A aortic dissection. Of these patients, 88% had undergone previous thoracic endovascular aortic repair. Prophylactic cerebrospinal fluid drainage (CSFD) was used in 91%. Fifteen (27%) patients were treated with F-EVAR, nine (16%) with fenestrations and branches, and 31 (56%) with B-EVAR. False lumen adjunctive procedures were used in 56%. Technical success was achieved in 96% of patients. The thirty day mortality rate was 7% and MAE rate was 20%. Spinal cord injury (SCI) grades 1 - 3 and grade 3 rates were 13% and 2%, respectively. Mean follow up was 33.0 ± 18.4 months. Survival and freedom from unscheduled re-intervention were 86% (standard error [SE] 5%) and 55% (SE 8%) at 24 months, respectively. Freedom from target vessel stenosis and occlusion was higher in F-EVAR at the 12 month follow up (p= .006) compared with B-EVAR. Fenestrated or branched endovascular repairs in patients with PD-TAAA showed high technical success, with acceptable early mortality and MAE rates. The SCI rate was > 10%, despite CSFD use and staged procedures. Almost a half of patients needed an unscheduled re-intervention within 24 months after F/B-EVAR.