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Testosterone Replacement, Low T, HCG, & Beyond
Blood Test Discussion
New Guy Here. TRT has been prescribed--but does my bloodwork warrant it?
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<blockquote data-quote="Nelson Vergel" data-source="post: 11900" data-attributes="member: 3"><p>Gizmo</p><p></p><p>The ECLIA methodology can over estimate estradiol in many men who have high CRP levels. </p><p></p><p>Here is some information previously posted on ExcelMale.com about estradiol testing in men</p><p></p><p><u><strong>RECOMMENDED ULTRASENSITIVE ESTRADIOL BLOOD TESTS FOR MEN:</strong></u></p><p><u><strong></strong></u><strong></strong></p><p><strong><strong><a href="http://press.endocrine.org/doi/full/10.1210/jc.2012-3861" target="_blank"></a></strong></strong></p><p><strong><strong><a href="http://press.endocrine.org/doi/full/10.1210/jc.2012-3861" target="_blank">Comparisons of Immunoassay and Mass Spectrometry Measurements of Serum Estradiol Levels and Their Influence on Clinical Association Studies in Men</a></strong></strong></p><p><strong><strong></strong></strong></p><p><strong><strong></strong></strong></p><p><strong><strong>"In conclusion, our findings suggest interference in the standard immunoassay-based E2 analyses, possibly by CRP or a CRP-associated factor. Although this interference does not seem to affect association studies between immunoassay E2 levels and skeletal parameters, we propose a reevaluation of previous association studies between immunoassay-based E2 levels and inflammation-related outcomes. In addition, MS-based assays are to be preferred for the quantification of E2 levels in men."</strong></strong></p><p><strong><strong></strong></strong></p><p><strong><strong>This is the most precise estradiol test for me provided by <u><strong>Labcorp:</strong></u><strong></strong></strong></strong></p><p><strong><strong><strong></strong></strong></strong></p><p><strong><strong><strong><strong>Estradiol, LCMS (Endocrine Sciences)</strong></strong></strong></strong></p><p><strong><strong><strong><strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong></strong></strong></strong></strong></p><table class='post-table class: cms_table, width: 100%' style='width: 100%'><strong><strong><strong><strong><tr><td ><p>[TD="colspan: 2"]</p></td><strong>Test Number: 500108 CPT Code: 82670</strong><td ><p>[/TD]</p></td></tr><tr><td ><p><strong>Specimen:</strong></p></td><td ><p>Serum (preferred) <strong>or plasma, <strong>frozen</strong></strong></p></td></tr><tr><td ><p><strong>Volume:</strong></p></td><td ><p>3 mL</p></td></tr><tr><td ><p><strong>Minimum Volume:</strong></p></td><td ><p>1.5 mL (<strong>Note: This volume does <strong>not allow for repeat testing.)</strong></strong></p></td></tr><tr><td ><p><strong>Container:</strong></p></td><td ><p>Gel-barrier tube, lavender-top (EDTA) tube, <strong>or green-top (heparin) tube</strong></p></td></tr><tr><td ><p><strong>Collection:</strong></p></td><td ><p>Serum/plasma must be separated from cells within 45 minutes of venipuncture. Send serum/plasma in a plastic transport tube. To avoid delays in turnaround time when requesting multiple tests on frozen samples, <strong>please submit separate frozen specimens for each test requested.</strong></p></td></tr><tr><td ><p><strong>Storage Instructions:</strong></p></td><td ><p><strong>Freeze. <strong><em>Stable at room temperature or refrigerated for two days. <strong><em>Stable for two years <strong>frozen.</strong></em></strong></em></strong></strong></p></td></tr><tr><td ><p><strong>Methodology:</strong></p></td><td ><p>Liquid chromatography/tandem mass spectrometry (LC/MS-MS)</p></td></tr></table></strong></strong></strong></strong></p><p><strong><strong><strong><strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong>This is the test performed by <u><strong>Quest Diagnostics:</strong></u><strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong>Estradiol, Ultrasensitive, LC/MS/MS</strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong>Test Code</strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong>30289</strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong>CPT Code(s)</strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong>82670</strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong>Preferred Specimen(s)</strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong>0.5 mL serum collected in a red-top tube <strong>(no gel)</strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong>Minimum Volume</strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong>0.2 mL</strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong>Collection Instructions</strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong>Specify age and sex on test request form. Plasma, fluid and serum collected in SST's are not acceptable specimen types.<strong>Ship frozen. Do not thaw.</strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong>Transport Temperature</strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong>Frozen</strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong>Specimen Stability</strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong>Room temperature: 48 hours</strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong>Refrigerated: 7 days</strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong>Frozen: 2 years</strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong>Methodology</strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></p><p><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong><strong>Liquid Chromatography Tandem Mass Spectrometry (LC/MS/MS)</strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></strong></p></blockquote><p></p>
[QUOTE="Nelson Vergel, post: 11900, member: 3"] Gizmo The ECLIA methodology can over estimate estradiol in many men who have high CRP levels. Here is some information previously posted on ExcelMale.com about estradiol testing in men [U][B]RECOMMENDED ULTRASENSITIVE ESTRADIOL BLOOD TESTS FOR MEN: [/B][/U][B] [B][URL="http://press.endocrine.org/doi/full/10.1210/jc.2012-3861"] Comparisons of Immunoassay and Mass Spectrometry Measurements of Serum Estradiol Levels and Their Influence on Clinical Association Studies in Men[/URL] "In conclusion, our findings suggest interference in the standard immunoassay-based E2 analyses, possibly by CRP or a CRP-associated factor. Although this interference does not seem to affect association studies between immunoassay E2 levels and skeletal parameters, we propose a reevaluation of previous association studies between immunoassay-based E2 levels and inflammation-related outcomes. In addition, MS-based assays are to be preferred for the quantification of E2 levels in men." This is the most precise estradiol test for me provided by [U][B]Labcorp:[/B][/U][B] [B]Estradiol, LCMS (Endocrine Sciences) [TABLE="class: cms_table, width: 100%"] [TR] [TD="colspan: 2"][B]Test Number: 500108 CPT Code: 82670[/B][/TD] [/TR] [TR] [TD][B]Specimen:[/B][/TD] [TD]Serum (preferred) [B]or plasma, [B]frozen[/B][/B][/TD] [/TR] [TR] [TD][B]Volume:[/B][/TD] [TD]3 mL[/TD] [/TR] [TR] [TD][B]Minimum Volume:[/B][/TD] [TD]1.5 mL ([B]Note: This volume does [B]not allow for repeat testing.)[/B][/B][/TD] [/TR] [TR] [TD][B]Container:[/B][/TD] [TD]Gel-barrier tube, lavender-top (EDTA) tube, [B]or green-top (heparin) tube[/B][/TD] [/TR] [TR] [TD][B]Collection:[/B][/TD] [TD]Serum/plasma must be separated from cells within 45 minutes of venipuncture. Send serum/plasma in a plastic transport tube. To avoid delays in turnaround time when requesting multiple tests on frozen samples, [B]please submit separate frozen specimens for each test requested.[/B][/TD] [/TR] [TR] [TD][B]Storage Instructions:[/B][/TD] [TD][B]Freeze. [B][I]Stable at room temperature or refrigerated for two days. [B][I]Stable for two years [B]frozen.[/B][/I][/B][/I][/B][/B][/TD] [/TR] [TR] [TD][B]Methodology:[/B][/TD] [TD]Liquid chromatography/tandem mass spectrometry (LC/MS-MS)[/TD] [/TR] [/TABLE] This is the test performed by [U][B]Quest Diagnostics:[/B][/U][B] [B]Estradiol, Ultrasensitive, LC/MS/MS [B]Test Code [B]30289 [B]CPT Code(s) 82670 [B]Preferred Specimen(s) 0.5 mL serum collected in a red-top tube [B](no gel) [B]Minimum Volume 0.2 mL [B]Collection Instructions Specify age and sex on test request form. Plasma, fluid and serum collected in SST's are not acceptable specimen types.[B]Ship frozen. Do not thaw. [B]Transport Temperature Frozen [B]Specimen Stability Room temperature: 48 hours Refrigerated: 7 days Frozen: 2 years [B]Methodology Liquid Chromatography Tandem Mass Spectrometry (LC/MS/MS)[/B][/B][/B][/B][/B][/B][/B][/B][/B][/B][/B][/B][/B][/B][/B][/B][/B] [/QUOTE]
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Testosterone Replacement, Low T, HCG, & Beyond
Blood Test Discussion
New Guy Here. TRT has been prescribed--but does my bloodwork warrant it?
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