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.

DPYD Testing Before Chemotherapy: Understanding Results

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Chemotherapy Safety Lab Interpretation 2026 Update Patient-Friendly DPYD testing identifies inherited variants that can make fluorouracil or capecitabine dangerously difficult to clear. Results help clinicians choose treatment and starting doses, but a negative genetic screen does not guarantee safety. 📖 ~12 minutes 📅 October 7, 2026 📝 Published: October 7, 2026 🩺 Medically Reviewed: October […]

Carbamazepine Level: Trough Timing, Range and Toxicity

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Medication Monitoring Lab Interpretation 2026 Update Patient-Friendly A result inside the laboratory range is not a safety certificate. The last dose, recent treatment changes and accompanying symptoms can completely change its meaning. 📖 ~12 minutes 📅 October 7, 2026 📝 Published: October 7, 2026 🩺 Medically Reviewed: October 7, 2026 ✅ Evidence-Based This guide was […]

Tacrolimus Trough Level: Dose Timing, Targets and Toxicity

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Transplant Medication Safety Lab Interpretation 2026 Update Patient-Friendly A tacrolimus trough level measures the drug in whole blood immediately before your next scheduled dose—usually 12 hours after twice-daily treatment or 24 hours after once-daily treatment. Targets depend on your formulation, transplanted organ and time since transplant; mistimed samples can mislead, and dose changes must come […]

Cat Scratch Disease Test: How to Read Bartonella Titers

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Infectious Diseases Lab Interpretation 2026 Update Patient-Friendly A swollen lymph node and a positive Bartonella antibody result can fit cat scratch disease—but neither establishes the diagnosis alone. Timing, the laboratory method, and the specimen chosen for PCR can change the next step. 📖 ~12 minutes 📅 October 7, 2026 📝 Published: October 7, 2026 🩺 […]

Valproic Acid Level: Ranges, Free Drug and Urgent Signs

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Medication Monitoring Lab Interpretation 2026 Update Patient-Friendly A result inside the laboratory range can still miss excessive active drug. Sampling time, treatment purpose, albumin, and symptoms determine what happens next. 📖 ~12 minutes 📅 October 7, 2026 📝 Published: October 7, 2026 🩺 Medically Reviewed: October 7, 2026 ✅ Evidence-Based This guide was written under […]

CMV IgG Positive, IgM Negative: Past Exposure or New Risk?

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CMV Antibodies Lab Interpretation 2026 Update Patient-Friendly CMV IgG positive IgM negative usually suggests previous cytomegalovirus exposure rather than a recent first infection. It does not prove that the virus is inactive, guarantee immunity, or exclude a pregnancy-related concern. 📖 ~12 minutes 📅 October 6, 2026 📝 Published: October 6, 2026 🩺 Medically Reviewed: October […]

Strongyloides IgG Positive: Meaning, Treatment and Follow-Up

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Parasitic Infection Lab Interpretation 2026 Update Patient-Friendly A positive Strongyloides antibody result suggests exposure but does not prove active infection. Because untreated infection can persist for decades, clinician review before steroids or other immunosuppressants is critical. 📖 ~12 minutes 📅 October 6, 2026 📝 Published: October 6, 2026 🩺 Medically Reviewed: October 6, 2026 ✅ […]

C. diff GDH Positive, Toxin Negative: Treatment Decisions

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Digestive Health Lab Interpretation 2026 Update Patient-Friendly The screen detects the organism, not necessarily the cause of your diarrhea. Treatment depends on the complete testing pathway and what is happening clinically. 📖 ~12 minutes 📅 October 6, 2026 📝 Published: October 6, 2026 🩺 Medically Reviewed: October 6, 2026 ✅ Evidence-Based This guide was written […]

TPMT Test Results: Safer Decisions Before Azathioprine

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Azathioprine Safety Lab Interpretation 2026 Update Patient-Friendly Low or absent TPMT activity changes how safely your body handles azathioprine. The test method, transfusion history, and NUDT15 result determine how much reassurance your report can provide. 📖 ~12 minutes 📅 October 6, 2026 📝 Published: October 6, 2026 🩺 Medically Reviewed: October 6, 2026 ✅ Evidence-Based […]

Positive Anti-GBM Antibodies: Goodpasture or Kidney Disease?

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Autoimmune Kidney Disease Lab Interpretation 2026 Update Patient-Friendly This antibody result can point to a time-sensitive kidney disorder—even when breathing feels normal. Diagnosis depends on the laboratory method, urine findings, kidney function, and sometimes tissue examination. 📖 ~12 minutes 📅 October 6, 2026 📝 Published: October 6, 2026 🩺 Medically Reviewed: October 6, 2026 ✅ […]