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      Endovascular Management of Immediate Procedure-Related Complications of Failed Hemodialysis Access Recanalization

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          Abstract

          Endovascular procedures are becoming the standard type of care for the management of hemodialysis vascular access dysfunction. As with any type of medical procedure, these techniques can result in procedure-related complications, although the expected number of complications is low. The clinical extent of these complications varies from case to case. Management of these cases depends on the clinical presentation. Major complications such as vein rupture, arterial embolism, remote site bleeding or hematoma, symptomatic pulmonary embolism and puncture site complications necessitating treatment require major therapy. Minor complications such as non-flow compromising small puncture site hematoma or pseudoaneurysms require little or no therapy. It is essential that the interventionist be prepared to manage these complications appropriately when they arise.

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          Percutaneous transvenous angioplasty in the treatment of vascular access stenosis.

          This study was undertaken to evaluate percutaneous transvenous angioplasty (PTVA) for the treatment of all types of vascular access stenosis in a large population of dialysis patients. Stenoses were identified by venography in patients who met a set of clinical criteria indicating the need for evaluation. The lesions were classified by location and type. Data were collected prospectively and analyzed separately for each lesion type. A total of 536 PTVA procedures was performed in 285 patients. This included 107 cases of long venous stenosis (> 6 cm) and 149 cases of mid-graft stenosis. In the total group, an initial success rate of 94% was obtained (80% or greater dilatation). A decrease in VPm (venous pressure measured on dialysis) of 35.9%, 32.4%, and 22.6% was seen at one week, one month, and three months, respectively. At 90 days, 180 days, and 360 days 90.6%, 61.3%, and 38.2%, respectively, of the treated grafts were continuing to be patent and functional with no need for repeat PTVA treatment. Repeat treatments for recurrent lesions were as successful as the initial treatment. It is concluded that vascular access stenosis can be easily diagnosed and that all categories of stenotic lesion can be effectively treated with PTVA.
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            Reporting standards for clinical evaluation of new peripheral arterial revascularization devices.

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              Hemodynamics of failing dialysis grafts.

              Pressures were measured in the graft and the central vein during 104 consecutive angiographic examinations of failing hemodialysis grafts. Stenosis severity greater than 40% led to a statistically significant rise in graft pressure. In grafts in which all stenoses were of 40% or less severity, the systolic pressures in the venous and arterial limbs of the grafts were 31% +/- 16 and 45% +/- 17, respectively, of systemic systolic pressure. In grafts in which the highest grade of stenosis was greater than 40%, pressures in the venous and arterial limbs of the grafts were 53% +/- 25 and 75% +/- 24, respectively, of systemic systolic pressure. Graft thrombosis tended to occur at a higher degree of lumen reduction (but at similar pressures) with central vein stenoses compared with venous anastomotic stenoses. Dialysis graft pressures can help determine the hemodynamic importance of stenoses and the need for intervention. Percutaneous intervention should achieve arterial and venous limb pressures of less than 50% and 33% of systemic pressure, respectively.
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                Author and article information

                Journal
                Korean J Radiol
                KJR
                Korean Journal of Radiology
                The Korean Radiological Society
                1229-6929
                2005-8330
                Jul-Sep 2005
                30 September 2005
                : 6
                : 3
                : 185-195
                Affiliations
                [1 ]Department of Radiology, Chosun University Hospital, Korea.
                [2 ]Department of Radiology, Soonchunhyang University Hospital, Korea.
                [3 ]Department of General Surgery, Soonchunhyang University Hospital, Korea.
                Author notes
                Address reprint requests to: Dong Erk Goo, MD, Department of Radiology, Soonchunhyang University Medical School, 657 Hannam-dong, Youngsan-gu, Seoul 140-743, Korea. Tel. (822)709-9396, Fax. (822)795-3928, dhk1107@ 123456hanmail.net
                Article
                10.3348/kjr.2005.6.3.185
                2685043
                16145295
                47c4c22f-deb6-4d34-8c63-a63fbc9a8154
                Copyright © 2005 The Korean Radiological Society

                This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

                History
                : 23 February 2005
                : 14 June 2005
                Categories
                Pictorial Essay

                Radiology & Imaging
                hemodialysis,transluminal angioplasty
                Radiology & Imaging
                hemodialysis, transluminal angioplasty

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