Certified Hand Therapist (CHT) Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Study for the Certified Hand Therapist Exam. Prepare with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

According to Eaton classification, what characterizes Type 1 for sprain/dislocations?

Fracture of the first metacarpal
Complete tear of the collateral ligaments
Hyperextension injury with avulsion of the volar plate
Mild sprain with no ligament damage

The correct answer is: Hyperextension injury with avulsion of the volar plate

Type 1 in the Eaton classification is characterized by an injury involving hyperextension that leads to the avulsion of the volar plate. This classification system is specifically used for analyzing injuries to the fingers, particularly those that involve the PIP (proximal interphalangeal) joint. In a Type 1 injury, the mechanism typically involves a hyperextension force, which can lead to the volar plate being pulled away from its normal attachment point on the proximal phalanx. This avulsion of the volar plate is significant because it underscores the importance of this anatomical structure in providing stability to the joint during motion. Understanding that Type 1 injuries are associated with a hyperextension mechanism helps differentiate them from more severe presentations, which would display greater ligamentous damage, like complete tears or fractures.