{"id":24765,"date":"2025-06-18T17:55:16","date_gmt":"2025-06-18T17:55:16","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=24765"},"modified":"2025-06-18T17:55:22","modified_gmt":"2025-06-18T17:55:22","slug":"deficiencies-of-each-of-the-following-coagulation-factors-would-cause-an-abnormal-prothrombin-time-pt-except","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/deficiencies-of-each-of-the-following-coagulation-factors-would-cause-an-abnormal-prothrombin-time-pt-except\/","title":{"rendered":"Deficiencies of each of the following coagulation factors would cause an abnormal Prothrombin Time (PT) except"},"content":{"rendered":"\n<p>Deficiencies of each of the following coagulation factors would cause an abnormal Prothrombin Time (PT) except <\/p>\n\n\n\n<p>A Factor V<\/p>\n\n\n\n<p> B Factor X <\/p>\n\n\n\n<p>C Factor VII <\/p>\n\n\n\n<p>D Factor IX<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\"><strong>The correct answer and explanation is:<\/strong><\/mark><\/p>\n\n\n\n<p>The correct answer is: <strong>D Factor IX<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p><strong>Prothrombin Time (PT)<\/strong> is a blood test that measures how long it takes blood to clot via the <strong>extrinsic<\/strong> and <strong>common coagulation pathways<\/strong>. It primarily evaluates the function of clotting factors involved in these pathways.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Extrinsic pathway factors:<\/strong> Mainly <strong>Factor VII<\/strong><\/li>\n\n\n\n<li><strong>Common pathway factors:<\/strong> <strong>Factors X, V, II (prothrombin), and fibrinogen (Factor I)<\/strong><\/li>\n<\/ul>\n\n\n\n<p>PT is prolonged (abnormal) if there is a deficiency or dysfunction in any of these factors.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Why Factors Affect PT or Not:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Factor V:<\/strong> Part of the common pathway. Deficiency prolongs PT.<\/li>\n\n\n\n<li><strong>Factor X:<\/strong> Part of the common pathway. Deficiency prolongs PT.<\/li>\n\n\n\n<li><strong>Factor VII:<\/strong> Part of the extrinsic pathway. Deficiency prolongs PT.<\/li>\n\n\n\n<li><strong>Factor IX:<\/strong> Part of the <strong>intrinsic pathway<\/strong>, which is evaluated by the Activated Partial Thromboplastin Time (aPTT), <strong>not<\/strong> PT. Therefore, deficiency in Factor IX does <strong>not<\/strong> affect PT but instead prolongs aPTT.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Summary:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>PT tests the extrinsic and common pathways: Factors VII, X, V, II, and fibrinogen.<\/li>\n\n\n\n<li>Deficiency in these factors prolongs PT.<\/li>\n\n\n\n<li>Factor IX belongs to the intrinsic pathway, so its deficiency <strong>does not<\/strong> prolong PT but prolongs aPTT instead.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Additional Notes:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>PT test clinical use:<\/strong> Often used to monitor warfarin therapy and assess liver function or vitamin K deficiency.<\/li>\n\n\n\n<li><strong>aPTT test:<\/strong> Used to assess intrinsic and common pathways, including Factors VIII, IX, XI, XII.<\/li>\n\n\n\n<li>Understanding which factors prolong PT or aPTT is key in diagnosing different bleeding disorders.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Deficiencies of each of the following coagulation factors would cause an abnormal Prothrombin Time (PT) except A Factor V B Factor X C Factor VII D Factor IX The correct answer and explanation is: The correct answer is: D Factor IX Explanation: Prothrombin Time (PT) is a blood test that measures how long it takes [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-24765","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/24765","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=24765"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/24765\/revisions"}],"predecessor-version":[{"id":24767,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/24765\/revisions\/24767"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=24765"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=24765"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=24765"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}