{"id":3353,"date":"2026-08-31T15:25:07","date_gmt":"2026-08-31T14:25:07","guid":{"rendered":"https:\/\/wheat-quail-856400.hostingersite.com\/?p=3353"},"modified":"2026-10-20T10:53:18","modified_gmt":"2026-10-20T09:53:18","slug":"disease-state-serum-ivdr-cross-reactivity-checklist","status":"publish","type":"post","link":"https:\/\/seamlessbio.de\/de\/disease-state-serum-ivdr-cross-reactivity-checklist\/","title":{"rendered":"Kreuzreaktivit\u00e4t"},"content":{"rendered":"<p><!--\nWORDPRESS BLOG POST\nSlug: disease-state-serum-ivdr-cross-reactivity-checklist\nSEO Title: Disease State Serum for IVDR Cross-Reactivity Testing \u2014 Practical Checklist | SeamlessBio\nMeta Description: A practical checklist of disease state serum panels needed for IVDR cross-reactivity and interference testing \u2014 autoimmune, infectious, endocrine, and metabolic conditions.\nFocus Keyword: disease state serum IVDR cross-reactivity testing\nCategory: IVD Development\nTags: IVDR, IVD, disease state serum, human biomaterials, diagnostics\n--><br \/>\n<!-- \nWORDPRESS BLOG POST \u2014 PASTE INTO GUTENBERG\nCategory: IVD Development\nAdd featured image\nInternal links already included in content\n--><\/p>\n<style>\n.sb-blog-post{font-family:-apple-system,BlinkMacSystemFont,\"Segoe UI\",Roboto,sans-serif;max-width:780px;margin:0 auto;padding:0 0 60px;color:#202020;line-height:1.75}\n.sb-blog-post .sb-lede{font-size:18px;font-weight:500;color:#3a4a50;border-left:4px solid #18b7b2;padding-left:20px;margin:0 0 32px;line-height:1.65}\n.sb-blog-post h2{font-size:24px;font-weight:800;margin:44px 0 14px;color:#111;padding-bottom:10px;border-bottom:2px solid #e2eceb}\n.sb-blog-post h3{font-size:18px;font-weight:700;margin:32px 0 10px;color:#18b7b2}\n.sb-blog-post p{margin:0 0 18px}\n.sb-blog-post ul,.sb-blog-post ol{margin:0 0 18px;padding-left:24px}\n.sb-blog-post li{margin-bottom:8px}\n.sb-blog-post table{width:100%;border-collapse:collapse;font-size:14px;margin:20px 0 28px;overflow-x:auto;display:block}\n.sb-blog-post th{background:#18b7b2;color:#fff;text-align:left;padding:10px 14px;font-weight:700;white-space:nowrap}\n.sb-blog-post td{padding:10px 14px;border-bottom:1px solid #e2eceb;vertical-align:top}\n.sb-blog-post tr:last-child td{border-bottom:none}\n.sb-blog-post td:first-child{font-weight:600;color:#111}\n.sb-blog-post a{color:#18b7b2;text-decoration:none;font-weight:600}\n.sb-blog-post a:hover{text-decoration:underline}\n.sb-blog-post strong{color:#111}\n<\/style>\n<div class=\"sb-blog-post\">\n<p class=\"sb-lede\">Kreuzreaktivit\u00e4tstests geh\u00f6ren zu den am schlechtesten ausgestatteten Teilen der IVD-Leistungsbewertung \u2013 bis die Benannte Stelle zwei Wochen vor Ihrer Einreichungsfrist fehlende Daten bem\u00e4ngelt. Dieser Beitrag liefert eine praktische Checkliste der Disease-State-Serumpanels, die f\u00fcr die IVDR-Leistungsbewertung \u00fcblicherweise ben\u00f6tigt werden, geordnet nach Assaytyp \u2013 damit Sie Ihren Beschaffungszeitplan richtig planen.<\/p>\n<h2>Warum Kreuzreaktivit\u00e4tstests f\u00fcr die IVDR wichtig sind<\/h2>\n<p>Ein IVD, das positive und negative Proben gesunder Spender oder best\u00e4tigt positiver Patienten richtig erkennt, funktioniert nicht automatisch in einer klinischen Population. Patienten haben selten nur eine Erkrankung \u2013 sie haben Begleiterkrankungen, gleichzeitige Infektionen, erh\u00f6hte Entz\u00fcndungsmarker, ungew\u00f6hnliche Antik\u00f6rperprofile und Stoffwechselst\u00f6rungen, die mit der Assaychemie wechselwirken und falsch-positive oder ver\u00e4nderte quantitative Ergebnisse erzeugen k\u00f6nnen.<\/p>\n<p>Die IVDR-Leistungsbewertung nach EU-Verordnung 2017\/746 verlangt den Nachweis, dass das Produkt in allen Situationen, denen es in der Zielpopulation begegnet, wie vorgesehen funktioniert. Bei einem Schilddr\u00fcsenassay f\u00fcr ein allgemeines klinisches Labor geh\u00f6ren dazu Patienten mit Autoimmunerkrankungen, Fettstoffwechselst\u00f6rungen und gleichzeitigen Infektionen \u2013 die alle Immunoassays st\u00f6ren k\u00f6nnen.<\/p>\n<h2>Das allgemeine Interferenzpanel \u2013 hier beginnen<\/h2>\n<p>Bevor Sie Ihr krankheitsspezifisches Kreuzreaktivit\u00e4tspanel aufbauen, sollte jede IVD-Leistungsbewertung ein allgemeines Interferenzpanel mit den h\u00e4ufigsten Quellen unspezifischer St\u00f6rungen in Immunoassays enthalten:<\/p>\n<table>\n<thead>\n<tr>\n<th>St\u00f6rsubstanz<\/th>\n<th>Mechanismus<\/th>\n<th>Typische Pr\u00fcfkonzentration<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Rheumafaktor (RF)<\/td>\n<td>IgM-Anti-IgG \u2013 verbr\u00fcckt in Sandwich-Assays murine F\u00e4nger- und Detektionsantik\u00f6rper<\/td>\n<td>Hoch positiv \u2013 &gt;500 IE\/ml<\/td>\n<\/tr>\n<tr>\n<td>Antinukle\u00e4re Antik\u00f6rper (ANA)<\/td>\n<td>Unspezifische Antik\u00f6rperbindung an Assaykomponenten<\/td>\n<td>ANA-positiv, Titer &gt;1:160<\/td>\n<\/tr>\n<tr>\n<td>HAMA (humane Anti-Maus-Antik\u00f6rper)<\/td>\n<td>Verbr\u00fccken murine Antik\u00f6rper im Sandwich-Format \u2013 falsch-positives Signal<\/td>\n<td>Hoch positiv &gt;100 ng\/ml<\/td>\n<\/tr>\n<tr>\n<td>Lip\u00e4mie<\/td>\n<td>Optische St\u00f6rung, Verdr\u00e4ngung aus der Proteinbindung<\/td>\n<td>Triglyceride &gt;1.000 mg\/dl<\/td>\n<\/tr>\n<tr>\n<td>Ikterus (Bilirubin)<\/td>\n<td>Optische St\u00f6rung bei den Detektionswellenl\u00e4ngen<\/td>\n<td>Bilirubin &gt;20 mg\/dl<\/td>\n<\/tr>\n<tr>\n<td>H\u00e4molyse<\/td>\n<td>Optische St\u00f6rung durch H\u00e4moglobin, freigesetzte intrazellul\u00e4re Enzyme<\/td>\n<td>H\u00e4moglobin &gt;500 mg\/dl<\/td>\n<\/tr>\n<tr>\n<td>Biotin (Vitamin B7)<\/td>\n<td>Konkurriert in Streptavidin-Biotin-basierten Assays mit biotinylierten Assaykomponenten<\/td>\n<td>&gt;1.000 ng\/ml \u2013 bei Einnahme von Nahrungserg\u00e4nzungsmitteln<\/td>\n<\/tr>\n<tr>\n<td>Polyklonale Hypergammaglobulin\u00e4mie<\/td>\n<td>Erh\u00f6htes Gesamt-IgG verursacht unspezifischen Hintergrund<\/td>\n<td>Gesamt-IgG &gt;30 g\/l<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Checkliste Kreuzreaktivit\u00e4t nach Assaytyp<\/h2>\n<h3>Assays f\u00fcr Infektionskrankheiten (HIV, HBV, HCV)<\/h3>\n<p>Die Kreuzreaktivit\u00e4tstests f\u00fcr Infektionsassays werden weitgehend durch die GTS 2009\/108\/EG festgelegt. \u00dcber das allgemeine Interferenzpanel hinaus geh\u00f6ren dazu:<\/p>\n<ul>\n<li>Koinfektionen: HIV-positive Spender f\u00fcr HBV- und HCV-Assays (und umgekehrt)<\/li>\n<li>Andere Hepatitisviren: Spender mit Antik\u00f6rpern gegen HAV, HEV, HDV<\/li>\n<li>Herpesviren: Spender mit Antik\u00f6rpern gegen CMV, EBV, HSV-1\/2, VZV<\/li>\n<li>Atemwegserreger: Influenza A\/B, Mycoplasma pneumoniae, Chlamydia pneumoniae<\/li>\n<li>Sexuell \u00fcbertragbar: Syphilis (Treponema pallidum), Chlamydia trachomatis, HSV-2<\/li>\n<li>Tropisch: Malaria (Plasmodium-Antik\u00f6rper und -Antigen), Toxoplasma gondii, Leishmania<\/li>\n<li>Geimpfte Spender: Hepatitis-B-Impfung, MMR, Influenza<\/li>\n<li>Schwangere Spenderinnen: 100\u2013200 Schwangere (1., 2., 3. Trimenon)<\/li>\n<\/ul>\n<h3>Schilddr\u00fcsenassays (TSH, fT4, fT3, Anti-TPO, TRAK)<\/h3>\n<p>Schilddr\u00fcsenassays geh\u00f6ren zu den st\u00f6ranf\u00e4lligsten Immunoassays der klinischen Chemie. Besondere Kreuzreaktivit\u00e4tsthemen:<\/p>\n<ul>\n<li>Heterophile Antik\u00f6rper und HAMA \u2013 sehr h\u00e4ufige Ursache falsch-positiver TSH-Werte<\/li>\n<li>Anti-TPO-positive Spender \u2013 f\u00fcr TSH- und fT4-Assays, bei denen Antik\u00f6rperbindung die Messung der freien Hormone beeinflusst<\/li>\n<li>TRAK-positive Spender \u2013 f\u00fcr die St\u00f6rung von TSH-Assays durch TSH-Rezeptor-Antik\u00f6rper<\/li>\n<li>Anti-Tg-positiv \u2013 f\u00fcr Interferenztests bei Thyreoglobulin-Assays<\/li>\n<li>Patienten mit Morbus Basedow und Hashimoto-Thyreoiditis \u2013 mit best\u00e4tigter klinischer Diagnose<\/li>\n<li>Schwangerschaftsserum \u2013 die TSH-Suppression im ersten Trimenon ist physiologisch; der Assay muss sie von einer pathologischen Suppression unterscheiden<\/li>\n<li>Biotin-Interferenz \u2013 besonders wichtig f\u00fcr Schilddr\u00fcsenassays auf Streptavidin-Biotin-Plattformen (TSH, fT4 auf Roche Elecsys)<\/li>\n<\/ul>\n<h3>Autoimmunassays (ANA, Anti-CCP, RF, dsDNA)<\/h3>\n<ul>\n<li>Gleichzeitige Autoimmunerkrankungen: SLE, rheumatoide Arthritis, Sj\u00f6gren-Syndrom, Myasthenia gravis, prim\u00e4r bili\u00e4re Cholangitis \u2013 Overlap-Syndrome sind h\u00e4ufig<\/li>\n<li>Infekti\u00f6se Ausl\u00f6ser: postinfekti\u00f6se ANA-Positivit\u00e4t \u2013 EBV, CMV, HCV k\u00f6nnen vor\u00fcbergehend ANA induzieren<\/li>\n<li>Alter und Geschlecht: \u00c4ltere weibliche Spender haben eine h\u00f6here Grundrate an ANA-Positivit\u00e4t<\/li>\n<li>Medikamente: Einige Wirkstoffe (Hydralazin, Procainamid, Isoniazid) l\u00f6sen einen medikamenteninduzierten Lupus mit ANA-Positivit\u00e4t aus \u2013 die Medikamentenanamnese sollte in den Spenderunterlagen dokumentiert sein<\/li>\n<\/ul>\n<h3>Herzmarker (Troponin, BNP, NT-proBNP, CK-MB)<\/h3>\n<ul>\n<li>HAMA \u2013 die wichtigste St\u00f6rsubstanz f\u00fcr Troponin-Assays mit murinen Antik\u00f6rpern<\/li>\n<li>RF \u2013 hoher RF kann murine Antik\u00f6rper verbr\u00fccken und falsch-positives Troponin erzeugen<\/li>\n<li>Serum bei Niereninsuffizienz \u2013 erh\u00f6htes Kreatinin (Troponin wird renal eliminiert \u2013 bei CKD auch ohne Herzschaden erh\u00f6ht)<\/li>\n<li>Skelettmuskelschaden: erh\u00f6htes CK-MM und Myoglobin k\u00f6nnen CK-MB-Assays st\u00f6ren<\/li>\n<li>H\u00e4molyse: besonders wichtig f\u00fcr Troponin-I-Assays, die durch freigesetztes H\u00e4moglobin gest\u00f6rt werden<\/li>\n<\/ul>\n<h3>Allergieassays (Gesamt-IgE, spezifisches IgE)<\/h3>\n<ul>\n<li>Polyklonale Hypergammaglobulin\u00e4mie \u2013 erh\u00f6hte Gesamtimmunglobuline k\u00f6nnen ein falsch erh\u00f6htes Gesamt-IgE erzeugen<\/li>\n<li>Parasit\u00e4re Infektionen: Ascaris-, Toxocara-, Schistosoma-Infektionen verursachen eine polyklonale IgE-Erh\u00f6hung, die eine Allergie vort\u00e4uscht<\/li>\n<li>Atopische Dermatitis: sehr hohes Gesamt-IgE (&gt;5.000 IE\/ml) \u2013 Tests zu Assaylinearit\u00e4t und Hook-Effekt<\/li>\n<li>Gleichzeitige Autoimmunerkrankung: Bei einigen Autoimmunerkrankungen tritt ein IgE-Mangel auf<\/li>\n<\/ul>\n<h2>Den Beschaffungszeitplan f\u00fcr Kreuzreaktivit\u00e4tsproben planen<\/h2>\n<p>Der h\u00e4ufigste Fehler ist, die Beschaffung der Kreuzreaktivit\u00e4tspanels als Nebensache zu behandeln \u2013 etwas, das man erst nach dem Design der Sensitivit\u00e4ts-\/Spezifit\u00e4tsstudie organisiert. In der Praxis haben manche Materialien lange Lieferzeiten:<\/p>\n<ul>\n<li><strong>Standardpanels (RF, ANA, lip\u00e4misch, ikterisch, h\u00e4molytisch):<\/strong> meist ab Lager verf\u00fcgbar \u2013 1\u20132 Wochen<\/li>\n<li><strong>Seltene positive Infektionsproben (Malaria, HTLV, Leishmanien):<\/strong> selten \u2013 4\u20138 Wochen Lieferzeit<\/li>\n<li><strong>HAMA hoch positiv:<\/strong> ungew\u00f6hnlich \u2013 2\u20134 Wochen<\/li>\n<li><strong>Medikamenteninduzierte Erkrankungen:<\/strong> erfordert Medikamentendokumentation \u2013 4\u20138 Wochen<\/li>\n<li><strong>Schwangerschaftskohorten:<\/strong> erfordert koordinierte Gewinnung \u2013 4\u20138 Wochen f\u00fcr trimesterspezifische Proben<\/li>\n<\/ul>\n<p>Planen Sie die Beschaffung des Kreuzreaktivit\u00e4tspanels im Studienzeitplan gleichzeitig mit Ihren Sensitivit\u00e4ts-\/Spezifit\u00e4tspanels ein \u2013 nicht danach.<\/p>\n<h2>Praktische n\u00e4chste Schritte<\/h2>\n<p>SeamlessBio liefert Disease-State-Serum und -Plasma f\u00fcr IVDR-Kreuzreaktivit\u00e4tstests in allen wichtigen Diagnostikbereichen \u2013 Autoimmunit\u00e4t, Infektionen, Schilddr\u00fcse, Allergie, Diabetes, Onkologie und Drogenscreening. Es handelt sich um native humane Biomaterialien mit best\u00e4tigten Diagnosebefunden, vollst\u00e4ndiger Spenderdokumentation und IVDR-Dokumentation auf Anfrage.<\/p>\n<ul>\n<li><a href=\"https:\/\/seamlessbio.de\/de\/disease-state-serum-patientenseren\/\">Disease-State-Serumpanels \u2013 vollst\u00e4ndiges Portfolio \u2192<\/a><\/li>\n<li><a href=\"https:\/\/seamlessbio.de\/de\/ivdr-class-d-sample-sets\/\">IVDR-Probensets der Klasse D \u2192<\/a><\/li>\n<li><a href=\"https:\/\/seamlessbio.de\/de\/ivd-qualitaetskontrollen\/\">Qualit\u00e4tskontrollen &#038; Standards \u2192<\/a><\/li>\n<li><a href=\"https:\/\/seamlessbio.de\/de\/what-is-disease-state-serum\/\">Was ist Disease-State-Serum? \u2192<\/a><\/li>\n<li><a href=\"https:\/\/seamlessbio.de\/de\/kontakt\/\">Panels oder Angebot anfordern \u2192<\/a><\/li>\n<\/ul>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Cross-reactivity testing is one of the most under-resourced parts of IVD performance evaluation \u2014 until a Notified Body review flags missing data two weeks before your submission deadline. This post gives you a practical checklist of disease state serum panels commonly required for IVDR performance evaluation, organised by assay type, so you can plan your [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_templately_pack_id":"","_templately_imported_at":"","_templately_source":"","_templately_import_session_id":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-3353","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Disease State Serum for IVDR Cross-Reactivity Testing - Checklist<\/title>\n<meta name=\"description\" content=\"A practical checklist of disease state serum panels needed for IVDR cross-reactivity and interference testing \u2014 autoimmune, infectious, endocrine, and metabolic conditions.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/seamlessbio.de\/de\/disease-state-serum-ivdr-cross-reactivity-checklist\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Disease State Serum for IVDR Cross-Reactivity Testing - 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