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Dive into the research topics where David W. Trost is active.

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Featured researches published by David W. Trost.


American Journal of Hypertension | 1999

Prevention of recurrent pulmonary edema in patients with bilateral renovascular disease through renal artery stent placement

Michael J. Bloch; David W. Trost; Thomas G. Pickering; Thomas A. Sos; Phyllis August

Pulmonary edema and congestive heart failure (both referred to here as PE) have been reported to be complications of bilateral renal artery stenosis or unilateral stenosis in a solitary functioning kidney (both referred to as BRAS). The goals of this study were to determine whether a history of PE was more common in patients with BRAS than in those with unilateral stenosis and a normal contralateral kidney (URAS), and whether recurrent PE could be prevented by renal artery stent placement. We evaluated 90 consecutive patients with renovascular disease who were treated with percutaneous renal artery stent placement. History and clinical follow-up were obtained through chart review and phone contact with referring physicians. Mean follow-up was 18.4 months after stent placement. Twenty-three of 56 (41%) subjects with BRAS had a history of PE before revascularization, compared with four of 34 (12%) subjects with URAS (P = .05). Twenty-five of the 27 patients with history of PE had adequate clinical follow-up. Seventeen of the 22 (77%) subjects with BRAS and history of PE had no further PE after stent placement in one or both renal arteries. The five BRAS subjects with recurrent PE after stent placement had evidence of stent thrombosis or restenosis. In contrast, only one of three (33%) URAS subjects with a history of PE remained free of PE after stent placement. We conclude that PE is a common complication of BRAS, but not of URAS. In patients with BRAS, recurrent PE can be prevented by successful stent placement in one or both renal arteries.


Journal of Vascular and Interventional Radiology | 2014

Characterization of In Vivo Ablation Zones Following Percutaneous Microwave Ablation of the Liver with Two Commercially Available Devices: Are Manufacturer Published Reference Values Useful?

Ronald S. Winokur; Jerry Y. Du; Bradley B. Pua; Adam D. Talenfeld; Akhilesh K. Sista; Marc Schiffman; David W. Trost; David C. Madoff

PURPOSEnTo analyze in vivo ablation properties of microwave ablation antennae in tumor-bearing human livers by performing retrospective analysis of ablation zones following treatment with two microwave ablation systems.nnnMATERIALS AND METHODSnPercutaneous microwave ablations performed in the liver between February 2011 and February 2013 with use of the AMICA and Certus PR ablation antennae were included. Immediate postablation computed tomography images were evaluated retrospectively for ablation length, diameter, and volume. Ablation length, diameter, and volume indices were calculated and compared between in vivo results and references provided from each device manufacturer. The two microwave antenna models were then also compared versus each other.nnnRESULTSnTwenty-five ablations were performed in 20 patients with the AMICA antenna, and 11 ablations were performed in eight patients with the Certus PR antenna. The AMICA and Certus PR antennae showed significant differences in ablation length (P = .013 and P = .009), diameter (P = .001 and P = .009), and volume (P = .003 and P = .009). The AMICA ablation indices were significantly higher than the Certus PR ablation indices in length (P = .026) and volume (P = .002), but there was no significant difference in ablation diameter indices (P = .110).nnnCONCLUSIONSnIn vivo ablation indices of human tumors are significantly smaller than reference ex vivo ablation indices, and there are significant differences in ablation indices and sphericity between devices.


Journal of Vascular and Interventional Radiology | 2001

Type B Aortic Dissection Complicating Renal Artery Angioplasty and Stent Placement

Michael J. Bloch; David W. Trost; Thomas A. Sos

Percutaneous renal artery stent placement has been demonstrated to improve blood pressure control and stabilize renal function in patients with atherosclerotic renal artery disease. However, this procedure is not without risk of significant morbidity, and its effectiveness, as compared to alternative treatments, has not been adequately established. The authors report a case of acute type B aortic dissection complicating renal artery stent placement. The authors postulate that an intimal disruption occurred during initial balloon angioplasty, and that repeated application of radial, shear, and torque forces during stent placement may have extended the injury. The diagnosis of acute aortic dissection should be considered in patients with suggestive symptoms immediately after stent placement.


Journal of Vascular Surgery | 2012

Open surgical inferior vena cava filter retrieval for caval perforation and a novel technique for minimal cavotomy filter extraction.

Peter H. Connolly; Vinod P. Balachandran; David W. Trost; Harry L. Bush

Late complications of retrievable inferior vena cava (IVC) filters resulting from IVC perforation and erosion into adjacent structures is an increasingly frequent phenomena. We describe six cases of open filter explantation for IVC penetration and offer a novel technique for open filter removal without the need for an extensive cavotomy. All patients had radiographic evidence of filter erosion into pericaval structures requiring open surgical filter explant. Four of the six patients underwent minimal cavatomy filter extraction, eliminating the need for caval reconstruction.


Journal of Arthroplasty | 2011

Magnetic Resonance Angiography in the Management of Recurrent Hemarthrosis After Total Knee Arthroplasty

Thomas W. Hash; Alex B. Maderazo; Steven B. Haas; Gregory R. Saboeiro; David W. Trost; Hollis G. Potter

Spontaneous hemarthrosis is an infrequent but disabling complication after total knee arthroplasty. The purpose of this case series is to demonstrate the utility of magnetic resonance angiography (MRA) in the evaluation of hemarthrosis after total knee arthroplasty. Patients presenting with hemarthrosis unexplained by trauma, anticoagulation, or a bleeding diathesis were retrospectively identified. Eighteen patients were referred for MRA to evaluate recurrent hemarthrosis after failing conservative therapy (n = 16) or synovectomy (n = 2). Despite artifact caused by the metallic components, diagnostic evaluation of regional vessels was made. In 12 of 13 cases that underwent embolization or synovectomy, a hypertrophic feeding artery (or arteries) was visualized on MRA. One case of negative MRA did not have subsequent surgery, and we are unable to comment on the rate of false-positives because all patients in this case series had evidence of bleeding. By characterizing the vascular anatomy and identifying a dominant artery (or arteries) supplying the hypervascular synovium, MRA can serve as a guide for subsequent embolization or synovectomy, as indicated.


Journal of Vascular and Interventional Radiology | 1992

Retrograde Approach for Contralateral Iliac and Infrainguinal Percutaneous Transluminal Angioplasty: Experience in 100 Patients

Bennett J. Kashdan; David W. Trost; Marcy B. Jagust; Marlene E. Rackson; Thomas A. Sos

To assess the technical feasibility of percutaneous transluminal angioplasty (PTA) performed by means of a retrograde contralateral approach, 201 PTA procedures performed from January 1989 to August 1990 were retrospectively reviewed. In 100 of these cases, the retrograde femoral artery puncture employed for acquisition of the initial diagnostic arteriogram was also used for angioplasty of 173 contralateral arteries. The overall technical success rate for PTA via the contralateral route was 91% (157 of 173 arteries). Overall success for contralateral suprainguinal disease was 94% (61 of 65) and was as follows for infrainguinal disease: femoral, 88% (68 of 77); popliteal, 90% (18 of 20); graft anastomoses, 100% (five of five); and infrapopliteal, 83% (five of six). There were eight procedure-related complications, including one clinically insignificant distal atheroembolization, two sheared balloon fragments, three arterial thromboses, and two postprocedural amputations. There were no puncture-related complications. PTA can be performed with a contralateral retrograde femoral puncture in a high percentage of patients, even when disease is well below the inguinal ligament.


Academic Radiology | 1996

In vitro model to evaluate the relative efficacy of catheter—directed thrombolytic strategies

Neil M. Khilnani; Margaret Lee; Priscilla Winchester; Patrick Zanzonico; Timothy McCaffrey; David W. Trost; Marcy B. Jagust; Barbara Binkert; Thomas A. Sos

RATIONALE AND OBJECTIVESnCatheter-directed thrombolytic therapy has become an accepted treatment for many vascular occlusions. However, the relative rates of lysis of the different methods of drug administration have not been quantified. We developed an in vitro model to simulate and quantify local lytic therapy of a thrombotic vascular occlusion and tested it by evaluating three catheter-directed lytic strategies.nnnMETHODSnSeven-centimeter-long segments of 125I-fibrinogen-labeled thrombus made from recently expired human blood from a blood bank were formed in plastic tubes and were placed in a flowing stream of saline. Using multisidehole catheters, the clots were treated with intrathrombic saline or urokinase administered by drip infusion or forced injection using identical total doses of drug and volumes of fluid. Using endhole catheters, saline or urokinase was drip infused into the leading edge of the thrombus using the same protocol. A collimated scintillation detector was used to quantify the amount of activity remaining in the thrombus during each experiment, and the resultant time-activity curves for the different trials were compared.nnnRESULTSnForced-injection administration of urokinase using a multisidehole catheter produced the fastest lysis, resulting in a half-life of 42 min. The other infusion methods were slower, with half-lives of 153 min for multisidehole urokinase drip infusion, 365 min for endhole urokinase drip infusion, and more than 1,000 min for multisidehole catheter forced injection of saline and multisidehole and endhole saline drip infusion. The differences among these groups were reproducible and statistically significant.nnnCONCLUSIONnResults suggest that a simple and inexpensive in vitro model simulating lysis of a vascular occlusion can produce reproducible quantitative data. The data demonstrate that forced injection of lytic agents with a multisidehole catheter enhances the rate of thrombolysis and that the enhancement is not primarily attributable to the mechanical effect of this mode of administration.


Clinical Imaging | 2009

Color duplex sonography in severe transplant renal artery stenosis: a comparison of end-to-end and end-to-side arterial anastomoses

Jing Gao; Jian Chu Li; Meng Su Xiao; Amelia Ng; David W. Trost; Michael J. Goldstein; Sandip Kapur; John Wang; David Serur; Qing Dai; Yu Xin Jiang; Robert J. Min

OBJECTIVEnThe aim of this study was to investigate differences in Doppler parameters between severe transplant renal artery stenosis (TRAS, arterial lumen reduction >80%) with end-to-end (EE) arterial anastomosis and that with end-to-side (ES) arterial anastomosis.nnnMETHODSnWe retrospectively reviewed color duplex sonography (CDUS) and digital subtraction angiography (DSA) images in 38 patients with severe TRAS (19 cases with EE and 19 cases with ES) between January 1, 2000, and December 31, 2006. Doppler parameters were analyzed, including peak systolic velocity (PSV) in the iliac artery, PSV at the arterial anastomosis, PSV in the transplant renal artery, PSV ratio of the stenotic artery/artery proximal to the stenosis, and acceleration time (AT) in the artery distal to the stenosis (in the intrarenal artery). All 38 cases with severe TRAS were initially diagnosed with CDUS and confirmed by DSA.nnnRESULTSnThere were significant differences in PSV in the stenotic artery (P<.01), PSV in the iliac artery (P<.001), and PSV ratios of stenotic artery/artery proximal to the stenosis (P<.001) between arterial anastomosis of EE and that of ES. There was no statistically significant difference in AT in the intrarenal artery between the two types of anastomosis (P>.05).nnnCONCLUSIONnSignificantly different PSVs in the stenotic artery, the iliac artery, and the PSV ratio between EE and ES arterial anastomoses should be considered in the interpretation of CDUS when screening for severe TRAS. Different criteria of CDUS need to be established depending on the type of arterial anastomosis in order to improve the accuracy in diagnosing severe TRAS.


Journal of vascular surgery. Venous and lymphatic disorders | 2016

Transjugular liver access cannula as a guiding instrument for the recanalization of chronic venous occlusions.

Eda Dou; Ronald S. Winokur; David W. Trost; Thomas A. Sos; Akhilesh K. Sista

BACKGROUNDnChronic venous occlusions can result in debilitating symptoms and can be refractory to standard methods of venous recanalization because of the formation of dense fibrous tissue. A transjugular liver access cannula can be incorporated into recanalization efforts to treat such refractory cases. This report describes our experience using the transjugular liver access cannula technique in nine patients.nnnMETHODSnA review of patients requiring venous recanalization between May 2012 and October 2014 identified nine cases that required the use of a transjugular liver access cannula as a guiding instrument. Lesion characteristics, technical success, and clinical outcomes were evaluated.nnnRESULTSnThe transjugular liver access cannula was used to traverse a total of nine chronic occlusions in both the upper and lower central venous systems in nine patients. The technical success rate was 100%. There were no clinically significant complications. One patient was lost to follow-up. Of the remaining eight patients, seven experienced symptomatic relief within 1 month of recanalization.nnnCONCLUSIONSnThe transjugular liver access cannula may serve as a useful adjunctive tool during difficult venous recanalizations, especially when traditional guidewire and catheter techniques fail.


Clinical Imaging | 2018

Successful management of recurrent iliofemoral venous in-stent stenosis (ISR) with a drug coated balloon (DCB)

Xi Xue; David W. Trost; Akhilesh K. Sista

Chronic lower extremity venous disease is morbid and expensive [1]. Percutaneous standard balloon angioplasty and stenting are effective in the management of chronic post-thrombotic iliofemoral venous outflow obstruction with one-year primary and secondary patency of 79% and 94%, respectively [2]. However, there are very few sustainable treatments for recurrent venous in-stent re-stenosis (ISR). The present report describes a patient with recurrent right iliofemoral instent thrombosis failing multiple repeated percutaneous interventions finally successfully managed by drug-coated balloon (DCB) angioplasty.

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A Armetta

Boston Medical Center

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B May

Memorial Sloan Kettering Cancer Center

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Alex B. Maderazo

Westchester Medical Center

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