&lt;h2&gt;&lt;span style=&quot;color: #33cccc;&quot;&gt;&lt;strong&gt;Overview&lt;/strong&gt;&lt;/span&gt;&lt;/h2&gt;
&lt;p&gt;&lt;span style=&quot;color: #808080;&quot;&gt;C4 level by RIA refers to the measurement of the concentration of complement component C4 in a biological sample, typically serum or plasma, using a Radioimmunoassay (RIA) technique. This test helps evaluate the level of C4, which is a protein involved in the complement system, aiding in the diagnosis and monitoring of certain immune system disorders and conditions.&lt;/span&gt;&lt;/p&gt;
&lt;hr /&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;h3&gt;&lt;span style=&quot;color: #33cccc;&quot;&gt;&lt;strong&gt;METHOD NAME&lt;br /&gt;&lt;/strong&gt;&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;&lt;span style=&quot;color: #808080;&quot;&gt;Radioimmunoassay (RIA)&lt;/span&gt;&lt;/p&gt;
&lt;h3&gt;&lt;span style=&quot;color: #33cccc;&quot;&gt;&lt;strong&gt;&lt;br /&gt;AVAILABILITY&lt;/strong&gt;&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;&lt;span style=&quot;color: #808080;&quot;&gt;TBC&lt;/span&gt;&lt;/p&gt;
&lt;h3&gt;&lt;span style=&quot;color: #33cccc;&quot;&gt;&lt;strong&gt;REPORTING NAME&lt;/strong&gt;&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;&lt;span style=&quot;color: #808080;&quot;&gt;C4a Level&lt;/span&gt;&lt;/p&gt;
&lt;h3&gt;&lt;span style=&quot;color: #808080;&quot;&gt;&lt;span style=&quot;color: #33cccc;&quot;&gt;&lt;strong&gt;OTHER NAME&lt;/strong&gt;&lt;/span&gt;&lt;/span&gt;&lt;/h3&gt;
&lt;ul&gt;
&lt;li&gt;&lt;span style=&quot;color: #808080;&quot;&gt;C4 anaphylatoxin&lt;/span&gt;&lt;/li&gt;
&lt;li&gt;&lt;span style=&quot;color: #808080;&quot;&gt;C4a Level&lt;/span&gt;&lt;/li&gt;
&lt;li&gt;&lt;span style=&quot;color: #808080;&quot;&gt;C4ades Arg Level&lt;/span&gt;&lt;/li&gt;
&lt;li&gt;&lt;span style=&quot;color: #808080;&quot;&gt;Complement C4a Level&lt;/span&gt;&lt;/li&gt;
&lt;/ul&gt;
&lt;div class=&quot;flex-1 overflow-hidden&quot;&gt;
&lt;div class=&quot;react-scroll-to-bottom--css-ffwkx-79elbk h-full&quot;&gt;
&lt;div class=&quot;react-scroll-to-bottom--css-ffwkx-1n7m0yu&quot;&gt;
&lt;div class=&quot;flex flex-col text-sm pb-9&quot;&gt;
&lt;div class=&quot;w-full text-token-text-primary&quot; dir=&quot;auto&quot; data-testid=&quot;conversation-turn-7&quot;&gt;
&lt;div class=&quot;px-4 py-2 justify-center text-base md:gap-6 m-auto&quot;&gt;
&lt;div class=&quot;flex flex-1 text-base mx-auto gap-3 juice:gap-4 juice:md:gap-6 md:px-5 lg:px-1 xl:px-5 md:max-w-3xl lg:max-w-[40rem] xl:max-w-[48rem] group final-completion&quot;&gt;
&lt;div class=&quot;relative flex w-full flex-col agent-turn&quot;&gt;
&lt;div class=&quot;flex-col gap-1 md:gap-3&quot;&gt;&amp;nbsp;&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;

&lt;h3 id=&quot;SpecimenType-title&quot;&gt;&lt;span style=&quot;color: #33cccc;&quot;&gt;&lt;strong&gt;SPECIMEN TYPE&lt;/strong&gt;&amp;nbsp;&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;&lt;span style=&quot;color: #808080;&quot;&gt;Plasma EDTA&lt;br /&gt;&lt;/span&gt;&lt;/p&gt;
&lt;h3&gt;&lt;span style=&quot;color: #33cccc;&quot;&gt;&lt;strong&gt;SHIPPING INSTRUCTIONS&lt;br /&gt;&lt;/strong&gt;&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;&lt;span style=&quot;color: #808080;&quot;&gt;TBC&lt;/span&gt;&lt;/p&gt;
&lt;div class=&quot;flex-1 overflow-hidden&quot;&gt;
&lt;div class=&quot;react-scroll-to-bottom--css-ffwkx-79elbk h-full&quot;&gt;
&lt;div class=&quot;react-scroll-to-bottom--css-ffwkx-1n7m0yu&quot;&gt;
&lt;div class=&quot;flex flex-col text-sm pb-9&quot;&gt;
&lt;div class=&quot;w-full text-token-text-primary&quot; dir=&quot;auto&quot; data-testid=&quot;conversation-turn-7&quot;&gt;
&lt;div class=&quot;px-4 py-2 justify-center text-base md:gap-6 m-auto&quot;&gt;
&lt;div class=&quot;flex flex-1 text-base mx-auto gap-3 juice:gap-4 juice:md:gap-6 md:px-5 lg:px-1 xl:px-5 md:max-w-3xl lg:max-w-[40rem] xl:max-w-[48rem] group final-completion&quot;&gt;
&lt;div class=&quot;relative flex w-full flex-col agent-turn&quot;&gt;
&lt;div class=&quot;flex-col gap-1 md:gap-3&quot;&gt;
&lt;div class=&quot;flex flex-grow flex-col max-w-full&quot;&gt;
&lt;div class=&quot;min-h-[20px] text-message flex flex-col items-start gap-3 whitespace-pre-wrap break-words [.text-message+&amp;amp;]:mt-5 overflow-x-auto&quot; dir=&quot;auto&quot; data-message-author-role=&quot;assistant&quot; data-message-id=&quot;51364005-ca87-4f44-9ae9-16e243c2b60c&quot;&gt;
&lt;div class=&quot;markdown prose w-full break-words dark:prose-invert light&quot;&gt;
&lt;h3&gt;&lt;span style=&quot;color: #33cccc;&quot;&gt;&lt;strong&gt;SPECIMEN COLLECTION&lt;/strong&gt;&lt;/span&gt;&lt;/h3&gt;
&lt;p style=&quot;font-weight: 400;&quot;&gt;&lt;span style=&quot;color: #808080;&quot;&gt;&lt;strong&gt;Container/Tube:&lt;/strong&gt;&amp;nbsp;Lavender top tube&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot;font-weight: 400;&quot;&gt;&lt;span style=&quot;color: #808080;&quot;&gt;&lt;strong&gt;Preferred:&lt;/strong&gt;&amp;nbsp;Lavender top tube&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot;font-weight: 400;&quot;&gt;&lt;span style=&quot;color: #808080;&quot;&gt;&lt;strong&gt;Acceptable:&lt;/strong&gt;&amp;nbsp;Lavender top tube&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot;font-weight: 400;&quot;&gt;&lt;span style=&quot;color: #808080;&quot;&gt;&lt;strong&gt;Specimen Volume:&lt;/strong&gt;&amp;nbsp;2 mL&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot;font-weight: 400;&quot;&gt;&lt;span style=&quot;color: #808080;&quot;&gt;&lt;span style=&quot;color: #33cccc;&quot;&gt;&lt;strong&gt;Collection Instructions:&lt;/strong&gt;&lt;/span&gt; Collect blood in lavender-top (EDTA) tube(s); plasma gel tube(s) are not suitable. Thoroughly mix, then centrifuge at room temperature within thirty minutes of collection (preferably immediately after venipuncture), and promptly freeze on dry ice or at -70&amp;deg;C. Send 1 mL of frozen EDTA plasma in a plastic vial.&lt;/span&gt;&lt;/p&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;
&lt;/div&gt;

C4 Level by RIA