Certified Hand Therapist (CHT) Examination common mistakes
CHT · Understand the traps and how to avoid them.
Choosing an answer that says a single provocative test (e.g., a positive Phalen's or Tinel's) 'confirms' carpal tunnel syndrome, instead of treating it as one piece of a clinical picture that is confirmed with electrodiagnostic testing and history.
Candidates memorize the names of special tests but never learn their test characteristics, so they treat all 'positive' findings as diagnostic. Tinel's and Phalen's are moderately sensitive but not highly specific, and many people without CTS have positive results.
What to do instead
Build a one-page table for every special test you are likely to see (Phalen's, Tinel's, Durkan's, Froment's, Watson's, TFCC load, Finkelstein's) with sensitivity, specificity, and what a positive result actually supports. Drill the rule that CTS is a clinical diagnosis supported by NCS/EMG, not by a single physical test.
Misreading Semmes-Weinstein monofilament results: calling a 4.31 response 'normal' or labeling a 4.56 as 'loss of protective sensation'.
Candidates learn the filament numbers as a list without mapping them to the interpretation categories, and they confuse the monofilament test (threshold/light touch) with two-point discrimination (innervation density).
What to do instead
Memorize the interpretation bands as a ladder: 2.83-3.61 normal; 3.84-4.31 diminished light touch; 4.33-4.56 diminished protective sensation; 4.65-4.83 loss of protective sensation; 6.65 untestable. Pair each with a clinical consequence (e.g., protective sensation loss triggers skin-care and injury-prevention education).
Miscalculating total active motion or applying the wrong formula when scoring a flexor tendon result, e.g., summing MCP, PIP, and DIP flexion without subtracting extension deficits.
Candidates memorize the number 260 degrees or the Strickland formula as an isolated fact and freeze when the item supplies raw goniometric values for a real hand.
What to do instead
Practice with 5-10 worked examples: TAM = (MCP + PIP + DIP flexion) - (extension deficits at those joints); Strickland = (active PIP + DIP flexion) - extension deficit, divided by 175, times 100. Write the formula out before computing, and check whether the question asks for TAM, TPM, or a Strickland percentage.
Attributing intrinsic muscles to the wrong nerve, e.g., assigning the abductor pollicis brevis to the ulnar nerve or the abductor digiti minimi to the median nerve, or confusing which nerve supplies the lumbricals.
Candidates study the hand as a list of muscle names and actions but never attach the nerve supply as a spatial map, so similar-sounding muscles get shuffled under time pressure.
What to do instead
Redraw the hand from memory weekly: median = thenar muscles (APB, OP, FPB superficial head, APL) plus lumbricals 1 and 2; ulnar = hypothenar, adductor pollicis, interossei, lumbricals 3 and 4, and the deep head of FPB. Anchor each muscle to a clinical sign (e.g., Froment's sign = adductor pollicis weakness = ulnar).
Confusing the avascular necrosis eponyms and vascular anatomy, e.g., mixing up Kienbock's (lunate) with Preiser's (scaphoid), or not recognizing that the scaphoid's distal-to-proximal blood supply explains its high nonunion risk.
These are learned as name-only flashcards without the vascular reasoning that makes them memorable, so the names blur together under exam pressure.
What to do instead
Learn each eponym as a story of blood supply: scaphoid receives a retrograde supply entering distally, so proximal pole fractures risk AVN (Preiser's); the lunate's single volar supply explains Kienbock's. Group them with the related complication (nonunion, AVN, arthritis) rather than as isolated names.
Selecting composite wrist-plus-digit flexion exercises in the first weeks after a flexor tendon repair, or prescribing place-and-hold when the protocol calls for early active motion (or the reverse).
Candidates memorize protocol labels ('early passive', 'place and hold', 'early active') without understanding the underlying biomechanics - that wrist position changes flexor tendon tension and that simultaneous wrist and digital flexion can overload the repair.
What to do instead
Study the rationale, not the label: flexor excursion and tension depend on wrist and MCP position, and the repair site must be protected from active tension in early phases. For each protocol, be able to state the wrist position, which joints move actively vs passively, and what a violation would do to the repair.
Fabricating or selecting a splint position that ignores the safe/resting position, e.g., a resting hand splint with the wrist in 45 degrees of flexion, or MCP joints held in extension for a prolonged period.
Candidates focus on the diagnosis (e.g., 'rest the hand') and forget that immobilization position itself causes stiffness and contracture - the collateral ligaments shorten in extension at the MCP and in flexion at the IP joints.
What to do instead
Memorize the safe position: wrist 0-20 degrees extension, MCP 70-90 degrees flexion, IP joints in full extension, thumb in abduction. For any splint question, check three things: joint angles, three-point fixation for the desired force, and whether the position prevents the most likely contracture.
Applying the same joint mobilization grade regardless of tissue irritability, e.g., choosing grade III-IV oscillations for an acutely inflamed, highly irritable joint or for a patient with CRPS.
Candidates learn the grades as a table (I-II pain, III-IV mobility) but never practice matching grade to the patient's irritability level, so they apply the rule to the diagnosis rather than to the presentation.
What to do instead
Practice a two-step decision: first rate irritability (pain before/during/after activity and time to settle), then choose the grade. High irritability gets grade I-II and gentle pain-free motion; low irritability with capsular stiffness gets grade III-IV. Always check the question for irritability cues such as night pain and prolonged symptom flare.
Treating a statistically significant result as clinically meaningful, or misreading sensitivity versus specificity (e.g., saying a highly sensitive test is best for confirming a diagnosis in a patient who already has symptoms).
Candidates with strong clinical backgrounds often have weak statistics exposure and rely on the p-value as the whole story, while glossing over likelihood ratios, confidence intervals, MCID, and MDC.
What to do instead
Drill the core distinctions: sensitivity rules out (SnNout), specificity rules in (SpPin), MCID is the smallest change patients perceive as beneficial, MDC is the change beyond measurement error. Practice reading an abstract and stating in one sentence whether the finding changes your practice and why.
Answering scope-of-practice, consent, or supervision items from intuition rather than from the regulatory framework - e.g., assuming a physician referral alone authorizes any intervention, or being unable to state what a CHT candidate may do versus what requires the certified therapist.
Candidates concentrate almost entirely on clinical content and treat professional practice items as common sense, but these questions hinge on specific definitions: informed consent, supervision levels, documentation requirements, and modality precautions.
What to do instead
Build a short reference sheet covering informed consent elements, the distinction between referral and authorization, supervision requirements for assistants and candidates, and the precautions/contraindications for thermal and electrical agents. For each item, identify who is accountable and what must be documented before choosing an answer.