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The patient developed oedema in the arm with the AVF&#44; which produced progressively worsening pain and functional impairment&#46; The patient was diagnosed with occlusion of the subclavian vein&#44; and several attempts at PTA resulted in early recurrence&#46; We decided to place a right central venous catheter and to close the AVF due to poor functioning&#46; The AVF was annulled through ultrasound-guided injection of thrombin &#40;Figure 1&#41; into the cephalic vein&#44; producing thrombosis&#46; Ten days later&#44; the oedema had disappeared and the artery was again patent with no symptoms&#46;</p><p class="elsevierStylePara">&#160;</p><p class="elsevierStylePara"><span class="elsevierStyleBold">CASE REPORT 2</span></p><p class="elsevierStylePara">&#160;</p><p class="elsevierStylePara">Our second patient was a 74-year old female on haemodialysis since 2010 with a right humerocephalic fistula&#44; which developed pain and increased volume of the right arm&#44; producing functional impairment and poor functioning of the AVF &#40;Figure 2&#41;&#46; We performed a phlebography of the right arm&#44; observing obstruction of the subclavian vein&#46; We attempted to re-establish patency using endovascular techniques with no success&#46; Given the progressively worsening symptoms&#44; we decided to place a central jugular venous catheter and to close the AVF&#46; We injected thrombin into the cephalic vein under ultrasound guidance approximately 4-5cm from the AVF and confirmed thrombosis&#46; In a follow-up consultation 7 days later&#44; the patient reported improvements in sensations of pain&#44; although oedema remained&#46; A Doppler ultrasound analysis revealed patency along the first few centimetres of the cephalic vein&#44; but the rest of the vein was thrombosed up to the junction with the axillary vein&#46; We performed another proximal injection&#44; obtaining thrombosis of the entire cephalic vein&#46; Seven days later&#44; the oedema had disappeared &#40;Figure 3&#41;&#46; A follow-up Doppler ultrasound analysis confirmed occlusion of the cephalic vein and patency of the humeral artery&#46;</p><p class="elsevierStylePara">&#160;</p><p class="elsevierStylePara"><span class="elsevierStyleBold">DISCUSSION</span></p><p class="elsevierStylePara">&#160;</p><p class="elsevierStylePara">Between 17&#37; and 40&#37; of patients on haemodialysis will develop central vein stenosis due to multiple cannalisations&#46;<span class="elsevierStyleSup">1&#44;2</span> This can produce incapacitating oedema due to venous hypertension in up to 40&#37;-50&#37; of cases&#46;<span class="elsevierStyleSup">2&#44;3</span> Initial treatment generally involves angioplasty with or without stent placement&#46; However&#44; the duration of this solution is limited&#44; producing primary patency and assisted patency rates of 20&#37;-30&#37; and 60&#37;-70&#37;&#44; respectively&#44; after 12 months&#46;<span class="elsevierStyleSup">3&#44;4</span> In addition&#44; more than 50&#37; of patients will require subsequent interventions&#46;<span class="elsevierStyleSup">5</span> Revascularisation through open surgery involves higher rates of morbidity&#44; and surgical interventions produce a final patency that is similar to that produced by repeated endovascular procedures&#46;<span class="elsevierStyleSup">6 </span>Approximately 50&#37; of patients on haemodialysis with central venous stenosis finally require ligation of the AVF&#44; and this is particularly common in patients that produce no or only minimal initial responses to endovascular treatment&#46;<span class="elsevierStyleSup">6</span> Closure of the fistula is commonly performed using surgical techniques&#44; through dissection of the area of the anastomosis and ligation of the fistula under local anaesthetic&#46; This intervention is not without risks&#44; since it involves operating on an arm with oedema in an area that has already undergone multiple interventions due to complications of the AVF&#46; In our case&#44; we closed the AVF by injecting thrombin directly into the arterialised vein under ultrasound control&#46; This provides the advantages of being more comfortable for the patient &#40;avoids the need for subsequent interventions&#41;&#44; is less expensive&#44; and produces fewer complications&#46;</p><p class="elsevierStylePara">For this procedure&#44; we applied compression to the upper arm until flow to the fistula was completely occluded&#44; thus preventing the possibility of migration of the thrombus&#44; although even if this were to occur&#44; it would not produce any clinical repercussions since the subclavian vein was also occluded&#46; We used Doppler ultrasound guidance to locate the fistula and then continued 4-5cm distally along the vein in order to avoid accidental injection of thrombin into the artery&#46; We then placed the needle into the arterialised vein in the direction of blood flow&#44; in order to avoid migration of the thrombin towards the artery&#44; and injected the thrombin until thrombosis was achieved&#46; Finally&#44; after removing compression&#44; we placed a compressive bandage on the arm for 48 hours&#46;</p><p class="elsevierStylePara">We performed this technique on two obese patients&#44; after several failed attempts at re-establishing patency and with symptoms that incapacitated the patients&#46; In both cases&#44; the AVF was closed with no complications&#46; This is a simple&#44; fast&#44; inexpensive&#44; and comfortable technique for the patient and physician&#44; and should be taken into account as a treatment alternative when planning to close an AVF&#46;</p><p class="elsevierStylePara">&#160;</p><p class="elsevierStylePara"><span class="elsevierStyleBold">Conflicts of interest</span></p><p class="elsevierStylePara">&#160;</p><p class="elsevierStylePara">The authors state that they have no potential conflicts of interest related to the content of this article&#46;</p><p class="elsevierStylePara">&#160;</p><p class="elsevierStylePara"><a href="grande&#47;11613&#95;108&#95;39887&#95;en&#95;f115&#46;jpg" class="elsevierStyleCrossRefs"><img src="11613_108_39887_en_f115.jpg" alt="Humerocephalic anastomosis following the injection of thrombin"></img></a></p><p class="elsevierStylePara">Figure 1&#46; Humerocephalic anastomosis following the injection of thrombin</p><p class="elsevierStylePara"><a href="grande&#47;11613&#95;108&#95;39889&#95;en&#95;f215&#46;jpg" class="elsevierStyleCrossRefs"><img src="11613_108_39889_en_f215.jpg" alt="Internal right humerocephalic arteriovenous fistula with severe oedema and erythematous areas"></img></a></p><p class="elsevierStylePara">Figure 2&#46; Internal right humerocephalic arteriovenous fistula with severe oedema and erythematous areas</p><p class="elsevierStylePara"><a href="grande&#47;11613&#95;108&#95;39890&#95;en&#95;f315&#46;jpg" class="elsevierStyleCrossRefs"><img src="11613_108_39890_en_f315.jpg" alt="Clear improvement following closure of the arteriovenous fistula"></img></a></p><p class="elsevierStylePara">Figure 3&#46; Clear improvement following closure of the arteriovenous fistula</p>"
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Percutaneous closure of arteriovenous fistula for haemodialysis due to venous hypertension secondary to subclavian vein occlusion
Cierre percutáneo de fístula arteriovenosa para hemodiálisis por hipertensión venosa secundaria a oclusión de vena subclavia
Ignacio Artiguesa, Rosa M. Borrásb, M. José Barbasa, Rita Granchelb
a Servicio de Cirugía Vascular, Hospital General Universitario de Valencia,
b Servicio de Nefrología, Hospital General Universitario de Valencia,
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    "textoCompleto" => "<p class="elsevierStylePara"><span class="elsevierStyleBold">To the Editor&#58;</span></p><p class="elsevierStylePara">Central venous disease is a common issue in patients on haemodialysis following the creation of an arteriovenous fistula &#40;AVF&#41;&#46; The primary treatment of stenosis&#47;occlusion of the central vein consists of recannalising the vein using endovascular techniques&#58; percutaneous trans-luminal angioplasty &#40;PTA&#41; with or without stent placement&#46; However&#44; the venous patency produced by these procedures is limited&#44; and on occasions&#44; the fistula must be surgically closed due to symptoms of venous hypertension&#46; We propose a simpler and less aggressive approach for closure&#44; through ultrasound-guided thrombin injection&#46;</p><p class="elsevierStylePara"><span class="elsevierStyleBold">&#160;</span></p><p class="elsevierStylePara"><span class="elsevierStyleBold">CASE REPORT 1</span></p><p class="elsevierStylePara">&#160;</p><p class="elsevierStylePara">Our first patient was a 78-year old female on haemodialysis since 2009 with a left humerocephalic AVF&#46; The patient developed oedema in the arm with the AVF&#44; which produced progressively worsening pain and functional impairment&#46; The patient was diagnosed with occlusion of the subclavian vein&#44; and several attempts at PTA resulted in early recurrence&#46; We decided to place a right central venous catheter and to close the AVF due to poor functioning&#46; The AVF was annulled through ultrasound-guided injection of thrombin &#40;Figure 1&#41; into the cephalic vein&#44; producing thrombosis&#46; Ten days later&#44; the oedema had disappeared and the artery was again patent with no symptoms&#46;</p><p class="elsevierStylePara">&#160;</p><p class="elsevierStylePara"><span class="elsevierStyleBold">CASE REPORT 2</span></p><p class="elsevierStylePara">&#160;</p><p class="elsevierStylePara">Our second patient was a 74-year old female on haemodialysis since 2010 with a right humerocephalic fistula&#44; which developed pain and increased volume of the right arm&#44; producing functional impairment and poor functioning of the AVF &#40;Figure 2&#41;&#46; We performed a phlebography of the right arm&#44; observing obstruction of the subclavian vein&#46; We attempted to re-establish patency using endovascular techniques with no success&#46; Given the progressively worsening symptoms&#44; we decided to place a central jugular venous catheter and to close the AVF&#46; We injected thrombin into the cephalic vein under ultrasound guidance approximately 4-5cm from the AVF and confirmed thrombosis&#46; In a follow-up consultation 7 days later&#44; the patient reported improvements in sensations of pain&#44; although oedema remained&#46; A Doppler ultrasound analysis revealed patency along the first few centimetres of the cephalic vein&#44; but the rest of the vein was thrombosed up to the junction with the axillary vein&#46; We performed another proximal injection&#44; obtaining thrombosis of the entire cephalic vein&#46; Seven days later&#44; the oedema had disappeared &#40;Figure 3&#41;&#46; A follow-up Doppler ultrasound analysis confirmed occlusion of the cephalic vein and patency of the humeral artery&#46;</p><p class="elsevierStylePara">&#160;</p><p class="elsevierStylePara"><span class="elsevierStyleBold">DISCUSSION</span></p><p class="elsevierStylePara">&#160;</p><p class="elsevierStylePara">Between 17&#37; and 40&#37; of patients on haemodialysis will develop central vein stenosis due to multiple cannalisations&#46;<span class="elsevierStyleSup">1&#44;2</span> This can produce incapacitating oedema due to venous hypertension in up to 40&#37;-50&#37; of cases&#46;<span class="elsevierStyleSup">2&#44;3</span> Initial treatment generally involves angioplasty with or without stent placement&#46; However&#44; the duration of this solution is limited&#44; producing primary patency and assisted patency rates of 20&#37;-30&#37; and 60&#37;-70&#37;&#44; respectively&#44; after 12 months&#46;<span class="elsevierStyleSup">3&#44;4</span> In addition&#44; more than 50&#37; of patients will require subsequent interventions&#46;<span class="elsevierStyleSup">5</span> Revascularisation through open surgery involves higher rates of morbidity&#44; and surgical interventions produce a final patency that is similar to that produced by repeated endovascular procedures&#46;<span class="elsevierStyleSup">6 </span>Approximately 50&#37; of patients on haemodialysis with central venous stenosis finally require ligation of the AVF&#44; and this is particularly common in patients that produce no or only minimal initial responses to endovascular treatment&#46;<span class="elsevierStyleSup">6</span> Closure of the fistula is commonly performed using surgical techniques&#44; through dissection of the area of the anastomosis and ligation of the fistula under local anaesthetic&#46; This intervention is not without risks&#44; since it involves operating on an arm with oedema in an area that has already undergone multiple interventions due to complications of the AVF&#46; In our case&#44; we closed the AVF by injecting thrombin directly into the arterialised vein under ultrasound control&#46; This provides the advantages of being more comfortable for the patient &#40;avoids the need for subsequent interventions&#41;&#44; is less expensive&#44; and produces fewer complications&#46;</p><p class="elsevierStylePara">For this procedure&#44; we applied compression to the upper arm until flow to the fistula was completely occluded&#44; thus preventing the possibility of migration of the thrombus&#44; although even if this were to occur&#44; it would not produce any clinical repercussions since the subclavian vein was also occluded&#46; We used Doppler ultrasound guidance to locate the fistula and then continued 4-5cm distally along the vein in order to avoid accidental injection of thrombin into the artery&#46; We then placed the needle into the arterialised vein in the direction of blood flow&#44; in order to avoid migration of the thrombin towards the artery&#44; and injected the thrombin until thrombosis was achieved&#46; Finally&#44; after removing compression&#44; we placed a compressive bandage on the arm for 48 hours&#46;</p><p class="elsevierStylePara">We performed this technique on two obese patients&#44; after several failed attempts at re-establishing patency and with symptoms that incapacitated the patients&#46; In both cases&#44; the AVF was closed with no complications&#46; This is a simple&#44; fast&#44; inexpensive&#44; and comfortable technique for the patient and physician&#44; and should be taken into account as a treatment alternative when planning to close an AVF&#46;</p><p class="elsevierStylePara">&#160;</p><p class="elsevierStylePara"><span class="elsevierStyleBold">Conflicts of interest</span></p><p class="elsevierStylePara">&#160;</p><p class="elsevierStylePara">The authors state that they have no potential conflicts of interest related to the content of this article&#46;</p><p class="elsevierStylePara">&#160;</p><p class="elsevierStylePara"><a href="grande&#47;11613&#95;108&#95;39887&#95;en&#95;f115&#46;jpg" class="elsevierStyleCrossRefs"><img src="11613_108_39887_en_f115.jpg" alt="Humerocephalic anastomosis following the injection of thrombin"></img></a></p><p class="elsevierStylePara">Figure 1&#46; Humerocephalic anastomosis following the injection of thrombin</p><p class="elsevierStylePara"><a href="grande&#47;11613&#95;108&#95;39889&#95;en&#95;f215&#46;jpg" class="elsevierStyleCrossRefs"><img src="11613_108_39889_en_f215.jpg" alt="Internal right humerocephalic arteriovenous fistula with severe oedema and erythematous areas"></img></a></p><p class="elsevierStylePara">Figure 2&#46; Internal right humerocephalic arteriovenous fistula with severe oedema and erythematous areas</p><p class="elsevierStylePara"><a href="grande&#47;11613&#95;108&#95;39890&#95;en&#95;f315&#46;jpg" class="elsevierStyleCrossRefs"><img src="11613_108_39890_en_f315.jpg" alt="Clear improvement following closure of the arteriovenous fistula"></img></a></p><p class="elsevierStylePara">Figure 3&#46; Clear improvement following closure of the arteriovenous fistula</p>"
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