[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-506263-105":3,"detail-sidebar-cat-0-en-105":73,"doc-detail-506263-en":122},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":66,"head_meta":68,"extra_data":70,"updated_unix":72},105,"en","anticoagulation-in-severely-ill-patients-treated-with-continuous-hemofiltration","Anticoagulation in severely ill patients treated with continuous hemofiltration","","Continuous renal replacement therapies are increasingly used in the ICU for acute renal failure, where continuous hemofiltration and hemodialysis require effective anticoagulation to prevent clotting within extracorporeal circuits. Anticoagulation adequacy directly determines filter efficacy in plasma water and solute removal, overall filter longevity, and patient management. Insufficient anticoagulation worsens filtration and can lead to filter clotting and blood loss, while excessive anticoagulation increases bleeding complications reported in 5–26% of treatments. The review surveys current anticoagulant options and key factors guiding selection.",{"@graph":14,"@context":65},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/healthcare/","Healthcare",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/anticoagulation-in-severely-ill-patients-treated-with-continuous-hemofiltration/506263/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/anticoagulation-in-severely-ill-patients-treated-with-continuous-hemofiltration/506263.png","ImageObject",300,407,{"name":42,"@type":43},"McQueen","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-29","2026-10-05",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",5,{"@type":57,"mainEntity":58},"FAQPage",[59],{"name":60,"@type":61,"acceptedAnswer":62},"Which main categories of anticoagulation methods are reviewed for continuous renal replacement therapy?","Question",{"text":63,"@type":64},"The review discusses heparin and alternatives such as variable heparin dosing, low molecular weight heparin, regional heparinization and protamine neutralization, regional citrate anticoagulation, nafamostat mesilate, and prostaglandin analogue infusion.","Answer","https://schema.org",{"og:url":32,"og:type":67,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":69,"canonical":32},"index,follow",{"doc_id":71,"site_id":7},506263,1791485839,{"code":4,"msg":74,"data":75},"success",[76,80,84,88,92,97,101,106,111,114,118],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":77,"show_sort_weight":78,"slug":79},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":81,"show_sort_weight":82,"slug":83},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":85,"show_sort_weight":86,"slug":87},"Exam",70,"exam",{"id":55,"doc_module":4,"doc_module_name":25,"category_name":89,"show_sort_weight":90,"slug":91},"Comic",60,"comic",{"id":93,"doc_module":4,"doc_module_name":25,"category_name":94,"show_sort_weight":95,"slug":96},6,"Technology",50,"technology",{"id":98,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":99,"slug":100},7,40,"healthcare",{"id":102,"doc_module":4,"doc_module_name":25,"category_name":103,"show_sort_weight":104,"slug":105},8,"Research & Report",30,"research-report",{"id":107,"doc_module":4,"doc_module_name":25,"category_name":108,"show_sort_weight":109,"slug":110},9,"Religion & Spirituality",20,"religion-spirituality",{"id":109,"doc_module":4,"doc_module_name":25,"category_name":112,"show_sort_weight":109,"slug":113},"World Cup","world-cup",{"id":115,"doc_module":4,"doc_module_name":25,"category_name":116,"show_sort_weight":115,"slug":117},10,"Lifestyle","lifestyle",{"id":119,"doc_module":4,"doc_module_name":25,"category_name":120,"show_sort_weight":55,"slug":121},19,"General","general",{"code":4,"msg":74,"data":123},{"doc_id":71,"user_id":124,"nickname":42,"user_avatar":125,"doc_module":4,"category_id":98,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":126,"file_id":127,"file_url":128,"file_type":129,"file_size":130,"view_count":55,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":102,"language":131,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":132,"faqs":133,"seo_title":134,"seo_description":12,"update_tm":135,"read_time":109,"preview_page_count":4},5909890329169,"https://ap-avatar.wpscdn.com/davatar_9964176cb1d06d4a9deccf72a44ae3dc","# Anticoagulation in severely ill patients treatedwith continuous hemofiltration\n\nR.L.Mehta  \nDepartment of Medicine,Division of Nephrology.University of Califomia,San Diego,Califomia  \nContinuous renal replacement therapies are increasin-gly used to treat acute renal failure(ARF)in the ICU set-ting.The slow and steady removal of plasma water and/oruremic toxins in an inherent advantage for both conti-nuous hemofiltration and hemodialysis (CAVH,CAVHD)over intermittent dialysis.However,as in other extracor-poreal circuits,anticoagulation is essential to provent ac-tivation of the clotting mechanisms within the circuit¹.Theadequacy of anticoagulation plays a key role in the effica-cy of the filter in fluid and solute removall,overallflter lon-gevith and optimum patient management.If anticoagula-tion is insufficient,filtration performance deteriorates andthe filter may eventually clot²,contributing to blood loss.Excessive anticoagulation,on the other hand,may resultin bleeding complications reported to occur in 5 to 26%of treatment1,3.  \nThis review presents the currently available methods ofanticoagulation for continuous renal replacement therapyand discusses factors influencing selection of an appro-priate anticoagulant.The oldest and most frequently usedanticoagulant in continuous dialysis procedures is hepa-rin.However,alternatives have recently emerged,includ-ing variable heparin dosing,low molecular weight hepa-rin (LMWH),regional heparinization and neutralizationwith protamine,regional citrate anticoagulation(RCA)withtrisodium citrate,nafomostat mesilate and prostaglandinanalogue infusion.The efficacy of these techniques andtheir relative advantages and disadvantages will be discus-sed.  \n## Factors affecting anticoagulation in continuous renalreplacement\n\nTechnical aspects  \na)Access:A key determinant of anticoagulation in con-tinuous renal replacement is the access utilized.When apump is used delivery of blood as in continuous veno-ve-  \nnous hemofiltration(CWH)or dialysis(CWHD),the me-thod of anticoagulation is essentially similar to that utilized in conventional hemodialysis.Most centers have usedsystemic heparin in doses of 5-10 u/kg/hr preceded by abolus dose of 10-20 u/kg4.5.Similarly,prostacyclin infu-sion of LMWH have been used in doses similar to that inhemodialysis⁶.7.Regional citrate anticoagulation has notbeen utilized in this setting but should be possible forCWHD provided a calcium and alkali free dialysate is usedand ionized calcium is monitored⁸.This method might bedificult for CWH since convective clearance alone maybe insufficient to remove the citrate load⁹,but this needsfurther assessment.  \nThe driving force in continuous arteriovenous hemofil-tration (CAVH)or dialysis(CAVHD)is the patient's ownmean arterial pressure(MAP).The blood flow rates inCAVH are as low as one sixth those in machine dialysis(50-100 ml/min:300 ml/min).The slower blood flow rat-es are more conducive to activation of clotting mecha-nisms.Good arterviovenous access with minimal resis-tance (short blood lines)is thus essential for optimal bloodflow and filter patency.  \nThe choice of arterial and venous catheters can signifi-cantly influence blood flow rates.Jenkins et al.10 assessedthe effect of catheter dimensions on blood flow in CAVH.They found that the intemal diameter(1.D.)of the cathe-ter was a major factor but catheter length had less effecton blood flow rates(Qb).Catheters with I.D.of less than  \n1.0 mm do not provide adequate blood flow and mostadult systems require 2.0-3.0 I.D.catheters.Ideally,an 8French catheter should be used for both arterial and ve-nous access;however we have also used a 14F double lu-men catheter for femoral venous access without compro-mising blood flow.Additionally,the MAP should be main-tained above 70 mmHg and interruption in blood flowthrough the circuit avoided,particularly if the patient ismoved.  \nb)Membrane factors:Membranes for continuous the-rapies can be broadly classified into hemofilte","cbCaiaW0WCY41Zli","https://ap.wps.com/l/cbCaiaW0WCY41Zli","pdf",2502316,"English","# Anticoagulation in severely ill patients treated with continuous hemofiltration\n## Factors affecting anticoagulation in continuous renal replacement\n### Technical aspects\n#### Access\n#### Membrane factors\n#### Operational characteristics","[{\"question\":\"Which main categories of anticoagulation methods are reviewed for continuous renal replacement therapy?\",\"answer\":\"The review discusses heparin and alternatives such as variable heparin dosing, low molecular weight heparin, regional heparinization and protamine neutralization, regional citrate anticoagulation, nafamostat mesilate, and prostaglandin analogue infusion.\"}]","Anticoagulation in severely ill patients treated with continuous hemofiltration | PDF",1791162184]