{"uid":"cap_sqL8qSJ2I1idNaEl29irZ","slug":"graham-2006-cts-6-carpal-tunnel-syndrome-probability-score-e1dcc472","name":"Graham 2006 CTS-6 Carpal Tunnel Syndrome Probability Score","description":"Graham 2006 CTS-6 from six caller-assigned booleans with published discrete weights (median-territory numbness 3.5, nocturnal numbness 4, thenar atrophy or weakness 5, Phalen 5, two-point discrimination loss 4.5, Tinel 4; max 26). Score >5 is associated with ≈25% probability of CTS; score >12 with ≈80%. magent does not examine the patient. Deterministic published arithmetic with citation; not a CTS diagnosis, not an EMG order, not a Boston questionnaire, and not a medical device.","url":"https://api.magentlab.com/api/calc/cts_6","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"headers":{"type":"object","additionalProperties":{"type":"string"}},"queryParams":{"type":"object","required":["median_numbness","nocturnal_numbness","thenar_atrophy_or_weakness","phalen_positive","two_point_discrimination_loss","tinel_positive"],"properties":{"tinel_positive":{"type":"boolean","description":"Positive Tinel sign (Graham 2006, 4 if true). true or false as assigned by the caller. magent does not examine the patient."},"median_numbness":{"type":"boolean","description":"Numbness predominantly or exclusively in the median nerve territory (Graham 2006, 3.5 if true). true or false as assigned by the caller. magent does not examine the patient."},"phalen_positive":{"type":"boolean","description":"Positive Phalen test (Graham 2006, 5 if true). true or false as assigned by the caller. magent does not examine the patient."},"nocturnal_numbness":{"type":"boolean","description":"Nocturnal numbness (Graham 2006, 4 if true). true or false as assigned by the caller. magent does not examine the patient."},"thenar_atrophy_or_weakness":{"type":"boolean","description":"Thenar atrophy or weakness (Graham 2006, 5 if true). true or false as assigned by the caller. magent does not examine the patient."},"two_point_discrimination_loss":{"type":"boolean","description":"Loss of two-point discrimination (Graham 2006, 4.5 if true). true or false as assigned by the caller. magent does not examine the patient."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_foQdfz_uUxuZJRD1f_r4z","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes the Graham 2006 CTS-6 clinical score from six boolean findings to estimate probability of carpal tunnel syndrome","exampleAgentPrompt":"Calculate the Graham 2006 CTS-6 score for a patient who has numbness primarily in the median nerve territory, nocturnal numbness, a positive Phalen test, a positive Tinel sign, but no thenar atrophy or weakness and no two-point discrimination loss.","exampleUseCases":[{"title":"Pre-referral CTS triage in primary care","prompt":"I've got a patient with nocturnal numbness, median territory numbness, and a positive Phalen test, but no Tinel sign, no thenar atrophy, and no two-point discrimination loss — can you run the CTS-6 score and tell me the associated CTS probability?"},{"title":"Documenting clinical decision rationale","prompt":"For my chart note, calculate the CTS-6 score for a patient with all six findings positive: median numbness, nocturnal numbness, thenar atrophy, positive Phalen, positive Tinel, and two-point discrimination loss."},{"title":"Ruling out CTS in low-suspicion presentation","prompt":"My patient has a positive Tinel sign only — no other CTS features. What does the Graham 2006 CTS-6 score come out to, and what probability of CTS does that suggest?"}],"resultDescription":"Returns the computed CTS-6 total score (maximum 26) derived from summing the weighted boolean inputs per Graham 2006 published weights. A score above 5 is associated with approximately 25% probability of CTS; a score above 12 with approximately 80% probability. The response does not constitute a diagnosis, EMG order, or medical device output.","failureModes":["Missing any of the six required boolean query parameters returns a validation error","Non-boolean values for boolean parameters cause a parse or validation error","Network or payment authorization failure returns an HTTP 402 or 5xx error"],"whenToPreferThis":"Use this endpoint when you need a deterministic, citation-backed arithmetic computation of the Graham 2006 CTS-6 score from caller-supplied physical exam booleans, and when you explicitly do not need EMG results, the Boston Carpal Tunnel Questionnaire, or any patient-interactive diagnostic device. Prefer this over generic medical knowledge retrieval when reproducibility and a published reference score are required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T13:07:35.743Z","isFirstParty":false}