Dr. Thomas Klein is a board-certified clinical hematologist serving as Chief Medical Officer at Kantesti AI. With over 15 years of experience in laboratory medicine and a strong interest in AI-supported interpretation of blood test results, he works to connect new technology with everyday clinical practice. His areas of interest include biomarker analysis, clinical decision support research and population-specific reference range optimization. As CMO, he contributes clinical input to the platform's internal benchmarking and provides clinical oversight for the medical quality of Kantesti's educational reports.

What Does High TSH Mean? Causes, T4, and Next Steps

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Thyroid Health Lab Interpretation 2026 Update Patient-Friendly A high TSH result usually points toward an underactive thyroid, but the number only makes sense when you read it beside free T4, symptoms, medications, and life stage. This is the kind of result that often looks alarming on paper and turns out to be very manageable with the right follow-up. 📖 ~11 minutes 📅 March 27, 2026 📝 Published: March 27, 2026 🩺 Medically Reviewed: March 27, 2026 ✅ Evidence-Based This guide was written under the leadership of Dr. Thomas Klein, MD in collaboration with the Kantesti AI Medical Advisory Board, including contributions from Prof. Dr. Hans Weber and medical review by […]

PSA Normal Range by Age: What High Levels Mean

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Men's Health Lab Interpretation 2026 Update Patient-Friendly A PSA number only makes sense when you read it in context: age, prostate size, recent sex, cycling, urinary symptoms, and trend over time all matter. We built this guide to help patients understand what their prostate blood test may be saying before they panic. 📖 ~11 minutes 📅 March 27, 2026 📝 Published: March 27, 2026 🩺 Medically Reviewed: March 27, 2026 ✅ Evidence-Based This guide was written under the leadership of Dr. Thomas Klein, MD in collaboration with the Kantesti AI Medical Advisory Board, including contributions from Prof. Dr. Hans Weber and medical review by Dr. Sarah Mitchell, MD, PhD. Lead […]

ESR Normal Range: High Sed Rate by Age and Sex

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Inflammation Marker Lab Interpretation 2026 Update Patient-Friendly A sed rate can look mildly abnormal for simple reasons — or point toward infection, autoimmune disease, anemia, or chronic inflammation. Here are the practical ranges clinicians use and how we interpret them in real life. 📖 ~11 minutes 📅 March 27, 2026 📝 Published: March 27, 2026 🩺 Medically Reviewed: March 27, 2026 ✅ Evidence-Based This guide was written under the leadership of Dr. Thomas Klein, MD in collaboration with the Kantesti AI Medical Advisory Board, including contributions from Prof. Dr. Hans Weber and medical review by Dr. Sarah Mitchell, MD, PhD. Lead Author Thomas Klein, MD Chief Medical Officer, Kantesti AI […]

Platelet Count Normal Range: High and Low Explained

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CBC Guide Lab Interpretation 2026 Update Patient-Friendly A CBC can look alarming when the platelet number falls outside range, but context usually changes the story. Here is how we interpret mildly high or low platelet results in clinic and inside Kantesti AI. 📖 ~10-12 minutes 📅 March 27, 2026 📝 Published: March 27, 2026 🩺 Medically Reviewed: March 27, 2026 ✅ Evidence-Based This guide was written under the leadership of Dr. Thomas Klein, MD in collaboration with the Kantesti AI Medical Advisory Board, including contributions from Prof. Dr. Hans Weber and medical review by Dr. Sarah Mitchell, MD, PhD. Lead Author Thomas Klein, MD Chief Medical Officer, Kantesti AI Dr. […]

eGFR Normal Range: Low GFR Meaning on Blood Tests

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Kidney Health Lab Interpretation 2026 Update Patient-Friendly A low eGFR on routine labs can be frightening, but one number does not diagnose kidney disease by itself. Here is how clinicians interpret eGFR, when a result may be temporarily low, and when follow-up matters. 📖 ~11 minutes 📅 March 27, 2026 📝 Published: March 27, 2026 🩺 Medically Reviewed: March 27, 2026 ✅ Evidence-Based This guide was written under the leadership of Dr. Thomas Klein, MD in collaboration with the Kantesti AI Medical Advisory Board, including contributions from Prof. Dr. Hans Weber and medical review by Dr. Sarah Mitchell, MD, PhD. Lead Author Thomas Klein, MD Chief Medical Officer, Kantesti AI […]

Vitamin D Levels Chart: Normal Range by Age and Risk

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Vitamin D ReferenceLab Interpretation2026 UpdatePatient-Friendly You got a vitamin D number back and want to know what it actually means. This guide translates a 25-hydroxyvitamin D result into plain clinical language: low, borderline, sufficient, high, and risky—then adds the context of age, pregnancy, body weight, kidney disease, osteoporosis risk, and season. ⏱️ Reading time: 15 minutes📅 Updated: March 26, 2026 📝 Published: March 26, 2026🩺 Medically Reviewed: March 26, 2026✅ Evidence-Based This guide was written under the leadership of Dr. Thomas Klein, MD in collaboration with the Kantesti AI Medical Advisory Board, including contributions from Prof. Dr. Hans Weber and medical review by Dr. Sarah Mitchell, MD, PhD. Lead Author […]

Women’s Health Guide: Ovulation, Menopause & Hormonal Symptoms

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Home › Blog › Women’s Health & Hormonal Symptoms Guide Comprehensive guide to women’s health including ovulation nausea, perimenopause symptoms, ovarian cyst evaluation, friable cervix, ureaplasma infection, and reproductive health. Learn when to seek care and how AI hormonal analysis can help decode your blood test results. 🩺 Gynecology 📊 Hormonal Analysis 👨‍⚕️ Physician Reviewed ✓ Medical Grade AI 📖 24 min read 📅 March 22, 2026 📝 Published: March 22, 2026 🩺 Medically Reviewed: March 22, 2026 🔄 Next Review: June 2026 ✅ Fact-Checked: March 22, 2026 This comprehensive guide was written under the leadership of Dr. Thomas Klein, MD in collaboration with the Kantesti AI Medical Advisory Board, […]