Upper Limb Ischemia After Vascular Access Surgery Differential Diagnosis and Management M Mazen Hachem*, MD, PhD, FACS., M Bosaeed* and M Wakka* *Division of Vascular Surgery King Abdul-Aziz Medical City Jeddah, KSA Ischemic Complications of VA • Ischemic Steal Syndrome (ISS) & Ischemic Monomelic Neuropathy (IMN) are devastating complications of VA procedure and mostly are subject to malpractice & lawsuit • 90% have steal phenomena – 5-20% have ischemic steal syndrome – 0.5-1% have IMN Duncan et al., JVS 4: 144, 1986 Odland et al., Surgery 110:664, 1991 Ischemic Complications of VA Ischemic Steal Syndrome • ISS results from uncompensated steal phenomena Regardless of VA flow – Poor collaterals – Proximal arterial stenosis • Reversible if treated promptly Ischemic Complications of VA Ischemic Monomelic Neuropathy • IMN results from blood flow alteration to vasa nervosum of Median, Radial & Ulnar nerves producing claw hand. Regardless of VA flow. – Irreversible even with appropriate strategy and early intervention. • Absence of severe tissue ischemia differentiate IMN from ISS. Objectives 1. Recognize clinical presentations – Ischemic Steal Syndrome – Ischemic Monomelic Neuropathy 2. Be familiar with treatment options 3. Select appropriate treatment options for each case. Ischemic Steal Syndrome Ischemic Monomelic Neuropathy Predominant feature Cold hand with pain on or off dialysis Weakness and paralysis of muscles with prominent sensory loss Onset Acute and chronic Immediately Access type Common with upper arm but also seen with forearm accesses Only in proximal access Sex Variable Female>Male Tissue involved Skin > muscle > nerve Nerves Cause Vascular insufficiency leading to distal hypoperfusion Vascular insufficiency causing nerve damage Radial pulse Usually diminished or absent Usually present Diagnostic evaluation History,/ physical examination, and arteriography History and the clinical features More prevalent in Patients with diabetes, peripheral vascular disease, smokers Patients with diabetes, peripheral vascular Disease + PN Management strategies Percutaneous and or Surgery Access ligation????? Ischemic Steal Syndrome Diagnosis • History/ Physical examination – Coldness – Radial pulse W/O access occlusion – Motor weakness & Sensory deficit – Trophic changes (late SS). Ischemic Steal Syndrome • Vascular Lab Diagnosis – Significant reduction in digital pressure and pulse volume recording – Digital pressure and pulse volume improve • Occlusion of AVF • Occlusion of V outflow • Occlusion of RA distal to AVF – Digital pressure and pulse volume made worse • Occlusion of RA proximal to AVF • Occlusion of UA • Angiogram Grading of Ischemic Steal Syndrome Grade Symptoms Management 0 I Asymptomatic Nothing II Ischemic symptoms during dialysis “Claudication” Non-Invasive Study Medical + Angiogram PTA/ Surgery III Rest pain / Tissue loss Angiogram & proceed Cold hand with tolerable Observation symptoms Flow augmentation by access occlusion Ischemic Steal Syndrome Goals of Treatment • Restore perfusion to the hand • Maintain Vascular Access Ischemic Steal Syndrome Treatment Options • Do nothing • PTA • Surgery 1. 2. 3. 4. 5. 6. Access ligation Banding Distal Revascularization-Interval Ligation (DRIL) Distalizaion of arterial inflow (RUDI) Proximalization of arterial inflow (RUPI) Minimally Invasive Limited Ligation EndoluminalAssisted Revision (MILLER) Treatment Options Access Ligation • Restore perfusion • Lost Vascular Access Banding • “Blind” banding w/o consideration of access flow is ineffective and ill-advised. Treatment Options What’s a DRIL Procedure? • Bypass increase distal flow • Eliminate steal phenomena due to arterial ligation • Resolved ischemia Procedure – Distal flow depending bypass Schanzer H, Schwartz M, Harrington E, Haimov M: Treatment of ischemia due to “steal” by arteriovenous fistula with distal artery ligation and revascularization. J Vasc Surg 7: 770–773, 1988 Brachial artery Cephalic vein Anastomosis site Brachial-to-brachial bypass Interval ligation mmhachem 2006-2007 Treatment Options RUDI Procedure • Increase distal flow • Decrease steal phenomena • Distal ischemia resolved Minion DJ, Moore E, Endean E: Revision using distal inflow: A novel approach to dialysis-associated steal syndrome. Ann Vasc Surg 19: 625–628, 2005 Treatment Options RUPI Procedure • Increase distal flow • Eliminate steal phenomena due to high graft resistant • Resolved ischemia J Zanow, U Kruger, H Schlz: Proximalization of arterial inflow: A new technique to treat access-related ischemia; J Vasc Surg, 43:1216-1221, 2006 Treatment Option What’s a MILLER Minimally Invasive Limited Ligation Endoluminal assisted Revision Gregg A. Miller, MD. 2006 Outpatient Procedure MILLER Procedure Treatment Options Guideline ACCESS FLOW MEASURMENT Treatment Options Guideline Measurement Access Blood Flow • Access blood flow will dictate management option: – Low or normal access flow • DRIL – High access flow • MILLER or RUDI or RUPI RESULTS Authors Year Proc. No. Pt. Results De Caprio 1997 Banding 18 100% ischemia resolved 1/11 AVG patent at 6 m 0/7 AVF patent at 30 D Haimovici 1996 DRIL 34 100% ischemia resolved 73% AVG patency at 1 year 96% bypass patency at 1 year Hachem 2006 DRIL 16 90% ischemia resolved 87.5% VA patency at1 year 81% bypass patency at 1year Zanow 2006 RUPI 30 80% ischemia resolved 90% patency MILLER 2010 MILLER 114 96% ischemia resolved 90% patency at 1 year Minion 2005 RUDI 6 100% ischemia resolved 100% patency 14m Minion 2005 RUPI 4 100% ischemia resolved 100% patency at 1 year Conclusion • Pay special attention to the elderly diabetic females with neuropathy – Immediate evaluation if post-op hand pain or other evidence of significant ischemia • Diagnosis almost can be made on clinical features & non-invasive studies • Angiogram is mandatory • Proximal arterial stenosis is a common contributing factor to hand ischemia Conclusion • Surgical treatment should provide – Adequate access flow – Restoring adequate flow to the extremity. • Main treatment options for ischemic steal syndrome – MILLER procedure – RUDI – RUPI – DRIL • Challenge is there for IMN