Traumatic Aortic and Celiac Pseudoaneurysm with Aortocaval Fistula Managed with Endovascular Aortic Cuff Deployment and Open Hepatic Revascularization.

We present the case of a young patient who sustained a gunshot wound to the abdomen initially treated with laparotomy and repair of small bowel, splenic vein and diaphragmatic injuries. Subsequent computed tomography (CT) performed for hemodynamic instability demonstrated a pseudoaneurysm involving the aorta and proximal celiac artery, with an associated aortocaval fistula. An attempt at transperitoneal repair of these injuries was aborted due to extensive inflammatory changes in the region encountered during exposure. Subsequently, a hybrid repair was performed. This consisted of exclusion of the aortic and celiac artery pseudoaneurysm using an endovascular aortic cuff (22 × 39 mm, Cook Medical) via infrarenal aortic access, surgical ligation of the celiac artery branches, and revascularization via bypass from the infrarenal aortic access site arteriotomy to the common hepatic artery.

Spontaneous Rectus Sheath Hematoma: Factors Predictive of Conservative Management Failure.

PURPOSE: To evaluate radiographic, laboratory, and clinical factors associated with conservative management (CM) failure in spontaneous rectus sheath hematoma (RSH). MATERIALS AND METHODS: Retrospective review of 72 patients with spontaneous RSH between 2006 and 2017 was performed. Patients were initially managed conservatively and then divided into 2 groups based on decision to embolize. No differences were found between embolization (n = 32) and CM (n = 40) groups in age (67.5 vs 69.5 y; P = .79), sex (31% vs 38% male; P = .58), body mass index (27.7 vs 25.7 kg/m2; P = .20), or medical comorbidities. Univariate analyses compared initial hemoglobin level, change in hemoglobin level, coagulation parameters, transfusion requirements, hematoma volume, and active extravasation on computed tomographic (CT) angiography between groups. Multivariable logistic regression identified factors predictive of CM failure. A scoring system was then created to predict CM failure. RESULTS: CM failed in 32 of 72 patients. Multivariable regression identified active extravasation on CT angiography (P = .02), hematoma volume (P = .01), and packed red blood cell (pRBC) transfusion of ≥ 4 U (P = .03) as predictors of embolization. A scoring system using these factors along with maximum rate of hemoglobin decrease yielded a sensitivity of 100% and specificity of 98% in determining need for embolization. CONCLUSIONS: CM for RSH was more likely to fail in patients with active extravasation on CT angiography, larger hematoma volume, pRBC transfusion of ≥ 4 U, and higher rate of hemoglobin decrease. Using these parameters, a scoring system was created that achieved high sensitivity and specificity in identifying patients who would require embolization.

Outcomes of Hypertensive Patients with Renal Fibromuscular Dysplasia Compared with Patients with Concomitant Atherosclerotic Renal Artery Stenosis following Endovascular Therapy.

PURPOSE: To examine if the outcomes after endovascular treatment in hypertensive patients with renal artery fibromuscular dysplasia (FMD) and incidental atherosclerotic renal artery stenosis (ARAS) differ from the outcomes in patients with FMD alone. MATERIALS AND METHODS: All cases of patients with renal artery FMD undergoing percutaneous transluminal angioplasty during the period 2002-2012 were reviewed. The patients with complete data before and after the procedure were identified (N = 84). Based on the procedural reports, these patients were separated into two cohorts: patients with isolated FMD (n = 59) and patients with concomitant atherosclerotic renal artery stenosis and FMD (ARAS-FMD) (n = 25). The medical record of each patient was reviewed for baseline blood pressure, antihypertensive medication use, and renal function data and the same data after the procedure. Procedural details including the angiographic findings, the number of stents placed, the average number of revascularization procedures, and the number of patients requiring more than one revascularization procedure were noted. RESULTS: The study population included 68 patients (FMD, n = 46; ARAS-FMD, n = 22). Patients in the FMD and ARAS-FMD cohorts experienced comparable significant decreases in systolic and mean arterial pressures after endovascular intervention. There was no change in the number of antihypertensive medications after the procedure within or between groups. Patients in the ARAS-FMD cohort had lower baseline estimated glomerular filtration rates (P = .007); however, renal function stabilized in both groups after endovascular therapy. CONCLUSIONS: Patients with ARAS-FMD respond to endovascular therapy with outcomes similar to patients with isolated renal artery FMD.

Meta-analysis of transjugular intrahepatic portosystemic shunt creation with or without intravascular ultrasound guidance.

OBJECTIVE: To conduct a meta-analysis to assess the efficacy of intravascular ultrasound (IVUS) during transjugular intrahepatic portosystemic shunt (TIPS) creation. METHODS: MEDLINE and Embase databases were queried until July 2022 for comparative studies reporting procedure metrics for TIPS creation with or without IVUS guidance. Meta-analysis was performed with random-effects modelling for total procedural time, time to portal venous access, fluoroscopy time, iodinated contrast volume use, air kerma, dose area product, and number of needle passes. Intraoperative procedure-related complications were also reviewed. RESULTS: Of 95 unique records initially identified, 6 were eligible for inclusion. A total of 194 and 240 patients underwent TIPS with and without IVUS guidance. Pooled analyses indicated that IVUS guidance was associated with reduced total procedure time (SMD -0.76 [95% CI -1.02, -0.50] P < .001), time to portal venous access (SMD -0.41 [95% CI -0.67, -0.15] P = .002), fluoroscopy time (SMD, -0.54 [95% CI -1.02, -0.07]; P = .002), contrast volume use (SMD, -0.89 [95% CI -1.16, -0.63]; P < .001), air kerma (SMD, -0.75 [95% CI -1.11, -0.38]; P < .001) and dose area product (SMD, -0.98 [95% CI -1.77, -0.20]; P = .013). A total of 4.2 and 7.8 needle passes were required in the IVUS and non-IVUS group, respectively (SMD, -0.60 [95% CI -1.42, 0.21]; P = .134). Pooled complication rates were 15.2% (12/79) and 21.4% (28/131), respectively. CONCLUSION: IVUS guidance during TIPS creation improves procedural metrics including procedural time, contrast usage, and radiation exposure. ADVANCES IN KNOWLEDGE: (1) The use of IVUS during TIPS is associated with shorter procedural time, lower contrast usage, and radiation exposure. (2)The use of IVUS is not associated with higher complication rates.

It's not just for laparoscopy anymore: use of insufflation under ultrasound and fluoroscopic guidance by Interventional Radiologists for percutaneous placement of intraperitoneal chemotherapy catheters.

OBJECTIVES: While intraperitoneal (IP) chemotherapy has shown significant survival benefits, the ability to successfully deliver IP chemotherapy has been limited. In GOG 172, surgically-placed IP catheters had a reported complication rate of 34%. In addition, IP catheters have to be placed surgically. We have developed a novel percutaneous placement technique for IP catheters in patients without ascites. METHODS: This study was a retrospective analysis of all patients receiving percutaneously-placed IP catheters from 12/2008 to present. Catheters were placed using a two-step technique under conscious sedation. IP access was gained using ultrasound-guided peritoneal puncture over the right lobe of the liver. A 5 Fr catheter was placed into the peritoneal cavity and the abdomen insufflated with carbon dioxide (CO(2)). Access was gained in the RLQ once distention separated the bowel from the abdominal wall. A 14.5 Fr multi-side hole catheter was coiled in the pelvis, and a reservoir tunneled onto the lower anterior chest wall. For this analysis, abstracted data included patient demographics, indication for catheter placement, complications (procedural and with chemotherapy delivery), fluoroscopy time, and timing/indication of catheter removal. RESULTS: Eleven patients received IP catheters. The mean age was 58 years, mean body mass index was 27.1, and mean number of days from surgical debulking was 38. There were two stage 2, and eight stage 3 patients. Two patients had fallopian tube, and nine patients had ovarian cancer. All patients had an optimal debulking procedure. Seven of 11 patients also obtained central intravenous access when the IP port was placed. Follow-up data were as follows: Average fluoroscopy time was 9 min. One patient (9%) had an intra-procedural complication but the catheter was successfully placed. Zero patients had catheter-related complications in the course of receiving chemotherapy. Five of the 11 patients (45%) completed the planned IP chemotherapy treatments, with three additional patients (27%) currently receiving therapy. The remaining three patients (27%) discontinued chemotherapy for reasons unrelated to IP catheter function: two due to chemotherapy side effects, and one with sepsis from a perforated diverticulum. CONCLUSIONS: Thus far, our experience with percutaneous placement of IP catheters is associated with a low risk of catheter-related complications and high technical success rates. CO(2) insufflation may make peritoneal puncture easier and potentially safer. This procedure offers an alternative to surgical placement, even in patients without clinically significant ascites.

Thoracic Aortic Emergencies: Presenting Pathologies and Treatment Strategies.

Thoracic aortic emergencies reflect a wide range of etiologies, pathologic processes, and clinical presentations. Accurate identification with an appropriate treatment algorithm is best accomplished in a multidisciplinary setting with interventional radiologists, vascular surgeons, and cardiothoracic surgeons. While knowledge of thoracic stent graft equipment and technique is essential in the treatment of thoracic aortic emergencies, many clinical settings may employ alternative treatment techniques. This article will review the most common thoracic aortic emergencies and treatment strategies.

Current status of percutaneous endografting.

Significant advances in the technology and techniques in the field of endovascular thoracic and abdominal aortic aneurysm repair have been made since its introduction in the early 1990s. The low incidence of periprocedural complications combined with comparable early outcomes to open surgery have made the endovascular treatment option the first choice of therapy in patients whose aortic anatomy is suitable for endografting. All currently available endografts for aortic aneurysm repair have delivery systems at least 21-French in outer diameter and have traditionally been inserted via surgical cutdowns. More recently, attempts to validate a totally percutaneous approach to the placement of these devices have been introduced by utilizing suture-mediated closure devices. This article will provide an overview of suture-mediated closure devices, our experience with the off-label application of suture-mediated devices for percutaneous closure of arterial access sites during endovascular aneurysm repair, and a review of the literature on this topic.

Percutaneous transluminal angioplasty and stenting in the treatment of chronic mesenteric ischemia: results and longterm followup.

BACKGROUND: The purpose of this study was to review the results of percutaneous transluminal angioplasty (PTA), stenting, or both in the treatment of patients who present with symptoms and angiographic findings most consistent with chronic mesenteric ischemia. STUDY DESIGN: A retrospective analysis of 33 consecutive patients from a single institution who underwent PTA, stenting, or both for treatment of symptoms most characteristic of chronic mesenteric ischemia was performed. RESULTS: There were 12 men and 21 women with a mean age of 63 years (range 40 to 89 years). Median weight loss was 28 lb (range 6 to 80 lb). Postprandial pain was present in 88% of the patients (29 of 33). All lesions treated were stenoses. PTA alone was performed in 21 patients (32 vessels), and PTA and stenting were performed in 12 patients (15 vessels). PTA was technically successful in 26 of 32 vessels (81.3%); PTA plus stenting was technically successful in 15 of 15 vessels (100%) (p = 0.073). Complete alleviation of symptoms occurred immediately in 27 of the patients (82%), and 2 patients (6%) had significant improvement in symptoms. There were four immediate clinical failures (12%): two patients were found to have occult malignancy and one had immediate relief of symptoms after surgical release of the median arcuate ligament. Followup data were obtained in all patients with clinically successful procedures (mean 38 months, median 25 months, range 1 to 123 months). Angiographic followup was available in 52% of the patients (15 of 29), at a mean of 20 months. The primary longterm clinical success rate was 83.3% (24 of 29). Four of the five patients with recurrent symptoms were successfully retreated with endovascular therapy. The primary assisted longterm clinical success rate was 96.6% (28 of 29). The 5-year survival rate was 76.1%. Major complications occurred in 13% of the procedures, with a 30-day mortality rate of 0%. CONCLUSION: Endovascular therapy for treatment of mesenteric arterial stenoses is effective in the treatment of patients with symptoms and angiographic findings characteristic of chronic mesenteric ischemia.

Gadolinium-based contrast agents in angiography and interventional radiology.

Gadolinium is useful as an alternative contrast agent for diagnostic angiographic and interventional procedures in patients with renal insufficiency or a history of a severe reaction to iodinated contrast material. Gadolinium usually is used as a "problem solver" to answer specific diagnostic questions or guide interventional procedures that cannot adequately be defined with CO2 angiography. Because of dose limitations with Gd, careful planning is required prior to its use with angiography or interventional procedures.

MR angiography of the renal arteries.

During, the past decade. MRA has evolved from an cxperimental technique into the modality of choice for the noninvasive evaluation of renovascular disease. The recent widespread application of MRA for these indications has been driven primarily by the advent of 3D contrast-enhanced MRA. which provides a fast, reliable technique for imaging large vascular territories and generates images, after postprocessing, similar in appearance to digital subtraction angiography. The cross-sectional volumetric nature of contrast-enhanced MRA affords some advantages over conventional catheter angiography. Although 3D contrast-enhanced MRA forms the backbone of vascular MR studies, several adjunctive sequences are employed to maximize the diagnostic yield of the examination. For example. flow-dependant imaging is used to complement the morphologic images of contrast-enhanced MRA by providing hemodynamic information. As such, MRA is unique among noninvasive imaging modalities in that it offers a comprehensive evaluation of anatomy and function. The availability and reliability of MRA extend renal artery screening to a wider spectrum of patients. Current applications of renal MRA range from detection of renal artery stenosis to evaluation for renal transplant donors.

MR angiography of the mesenteric vasculature.

MRA has evolved from a research tool to a robust clinical diagnostic modality. In many centers worldwide, it is the technique of choice for evaluating patients with suspected CMI, assessing operability of patients with pancreatic cancer, and investigating the portal system. Evolving indications include the assessment of liver transplant patients before and after transplant and of living related liver transplant donors. The search for the bleeding source in patients with gastrointestinal hemorrhage may be an indication in the future, once intravascular contrast agents become available.

Body MR venography.

MRV offers unique diagnostic possibilities for detection and characterization of venous disease. It allows evaluation of perivascular and vascular anatomy, evolution of thromboembolic events, and assessment of vascular flow. MRI is a diagnostic tool that can be tailored for a variety of clinical dilemmas, not only DVTs. Continued improvements in hardware and software will expand the role of MRV.

Relative value of analog and digital teaching files.

RATIONALE AND OBJECTIVES: This study was performed to determine if it is financially reasonable for radiology residency programs that create and maintain their own teaching files to switch from analog teaching files (ATFs) to digital teaching files (DTFs). MATERIALS AND METHODS: Radiology residency program directors were surveyed electronically about the monetary value and importance of conventional ATFs and DTFs. The costs for maintaining each type of file were calculated at the authors' institution. RESULTS: Surveys were sent to the program directors of all 197 accredited radiology residencies. Responses were received from 48 (24%). DTFs were scored as more important than ATFs, but the difference was not significant (P = .22). DTFs were rated as less complete (P = .01) but more current (P << .001) than ATFs. DTFs included the American College of Radiology Learning File (85%), in-house productions (77%), and other commercially available products (63%). Thirty percent of respondents had a DTF integrated into a picture archiving and communication system, and 28% reported having a technician dedicated to the teaching file. Program directors ascribed total median dollar values of $250 and $3,000 per year to their ATFs and DTFs, respectively. The annual costs at the authors' institution were much higher than these ascribed values: $44,720 ($91 per case) for maintaining a DTF produced in house and $24,601 ($50 per case) for maintaining an ATF, excluding physician time. CONCLUSION: Program directors are more willing to pay for a DTF than an ATF. For both, the costs of maintenance are great and the relative monetary value is low.

Percutaneous angioplasty and stenting of left subclavian artery stenosis in patients with left internal mammary-coronary bypass grafts: clinical experience and long-term follow-up.

The authors report their experience with percutaneous transluminal angioplasty (PTA) and stenting of the left subclavian artery (LSA) in patients with recurrent angina and a left internal mammary (LIMA)-coronary bypass graft or in patients who will be undergoing LIMA-coronary artery bypass grafting. From November 1990 to February 2001, 21 patients (11 men and 10 women) with significant left subclavian artery stenosis were treated; 18 patients had a prior LIMA bypass graft, and 3 patients were treated before coronary artery bypass surgery. Angiographic follow-up was performed in 12 patients and clinical follow-up was obtained in all patients. All lesions were atherosclerotic in etiology and located in the proximal left subclavian artery. The mean stenosis was 81% (range 50-100%). All patients initially underwent PTA. Stents were placed in 7 patients for suboptimal PTA results. Technical success was achieved in all patients. Pressure gradient measurements were available in 6 patients. Mean pretreatment gradient was 29 mm Hg (range, 10-50 mm Hg) and fell to 3 mm Hg (0-8 mm Hg) posttreatment. There were 2 minor and 2 major complications. The 30-day mortality rate was 9.5% (2 patients). The remaining 19 patients had clinical or angiographic follow-up of 4-68 months (mean, 27 months). Three patients were found to have recurrent stenoses by angiography 8-43 months after PTA and 3 more had clinical signs of recurrent stenosis. Therefore, the long-term clinical patency rate of LSA PTA and stent was 15 of 19 (79%). One was managed with bypass surgery, 1 with repeat PTA and stent placement, and 1 was managed conservatively. Therefore, the assisted patency was 15 of 19 (79%). Eleven of 19 (58%) of the patients in long-term follow-up had cardiac symptoms, but repeat angiography excluded recurrent LSA stenosis as the cause of their symptoms in 7 cases. Only 4/19 (21%) had cardiac symptoms potentially attributable to LSA restenosis. Four patients expired during follow-up, but 3 had no evidence of subclavian stenosis. PTA and stenting is an effective treatment of proximal left subclavian artery stenosis in patients who develop angina after a LIMA-coronary artery bypass, or in patients before a LIMA-CABG. Cardiac symptoms after LSA PTA and stent are most often due to progressive coronary artery disease rather than to recurrent LSA stenosis.

Hyperandrogenism of ovarian etiology: utilizing differential venous sampling for diagnosis.

BACKGROUND: We report the diagnosis and management of testosterone hypersecretion in the presence of an adrenal mass and no initially discernible ovarian mass. CASE: A 64-year-old woman with severe hyperandrogenism, including serum testosterone 392 ng/dL, male-pattern baldness, and hirsutism, required bilateral ovarian and adrenal venous sampling to determine the source of the testosterone. Once an ovarian origin was confirmed, total abdominal hysterectomy and bilateral salpingo-oophorectomy were performed for definitive treatment. The adrenal adenoma was left in situ. There was a dramatic decrease in subjective symptomatology and normalization of testosterone postoperatively. CONCLUSION: Preoperative differential venous sampling determined the correct source of testosterone. Subsequent removal of the ovary and steroid cell tumor correctly treated the hyperandrogenism and avoided an unnecessary surgical procedure for the adrenal adenoma.

Complicated postpartum type B aortic dissection and endovascular repair.

BACKGROUND: Fifty percent of aortic dissections in women younger than 40 years occur in association with pregnancy. Of these, half of type B dissections occur in the postpartum period. CASE: A 30-year-old woman was status post spontaneous vaginal delivery at 30 weeks of gestation for fetal death, complicated by an eclamptic seizure. On postpartum day 4, she suffered an acute, complicated type B aortic dissection treated with endovascular stent graft placement. CONCLUSION: Endovascular repair may be an attractive option for the treatment of complicated type B aortic dissections in pregnancy and the peripartum period, with reduced maternal and fetal mortality. This may allow the fetus to remain in situ and avoid the risks of surgery and possible cardiopulmonary bypass, with little radiation risk to the fetus.

Adrenal vein sampling.

Adrenal vein sampling is the gold standard for localizing aldosterone-secreting adenomas and for distinguishing adenomas from bilateral adrenal hyperplasia in patients with primary hyperaldosteronism. The importance of this distinction cannot be overstated because the former is curable surgically, whereas the latter is managed medically. Primary hyperaldosteronism has historically been underdiagnosed as a cause of hypertension, but recent reports highlight its ubiquitous nature with a prevalence of 5%-10% in screened hypertensive patients. Of such patients, up to 62.5% have a potentially curable adenoma as the underlying etiology. Adrenal vein sampling is a safe, highly effective procedure that is shown to alter the clinical management in 35.7% of primary hyperaldosteronism patients who would have otherwise been treated improperly based on the results of CT or other modalities. Although adrenal vein sampling is hindered by the inherent difficulty of catheterizing the right adrenal vein, technical success is reported as high as 97% in experienced hands. In this article, we review aldosterone physiology and the clinical workup of primary aldosteronism as well as the anatomic, technical, and analytical factors to be considered with adrenal vein sampling.

Treatment of renal artery fibromuscular dysplasia.

Fibromuscular dysplasia is a nonatherosclerotic and noninflammatory disease that can result in stenoses of the renal arteries and hypertension, most commonly affecting middle-aged women. Percutaneous transluminal angioplasty has long been considered the mainstay of therapy and offers high rates of improved or cured hypertension. The disease involves the mid and distal renal arteries and branchpoints and poses endovascular treatment challenges that separate fibromuscular dysplasia from atherosclerotic disease. The development of smaller balloon dilation systems offers safe and highly effective endovascular treatment options for technically difficult lesions. Newer technologies such as cutting balloons also add to the armamentarium of treatment choices, which may be useful in the setting of resistant stenoses. This article focuses on the modern technical considerations in the diagnostic evaluation and endovascular treatment of renal artery fibromuscular dysplasia.

Stenting for atherosclerotic renal artery stenosis.

Atherosclerotic renal artery stenosis (ARAS) is the most common cause of renal artery stenosis in the adult population. ARAS may result in progressive renal impairment, renovascular hypertension, and/or cardiac disturbance syndromes. Because medical therapy does not affect the progressive nature of this disease process, more aggressive treatments are needed to definitively treat ARAS. When performed correctly, renal artery stenting has been shown to stabilize or improve renal function and/or renovascular hypertension in 65-70% of carefully selected patients with ARAS. Therefore, percutaneous renal artery stenting should be considered the primary treatment for patients with symptomatic ARAS.