ABOS Part I Comprehensive Review - Batch 75

Question 1

A 45-year-old male industrial worker presents to the emergency department with a high-pressure injection injury to his non-dominant index finger. He states the injury occurred approximately 9 hours ago with paint thinner, but he initially felt minima

Accepted Answer

C. The type of injectate (paint thinner) and the delay to presentation.

Question 2

A 30-year-old painter sustains a high-pressure paint injection injury to the volar aspect of his middle finger, specifically involving the DIP joint region. Despite immediate surgical debridement and aggressive post-operative therapy, he develops a s

Accepted Answer

D. The flexor digitorum profundus (FDP) tendon and its sheath.

Question 3

A 50-year-old male presents to the emergency department with a high-pressure grease injection injury to his thumb, sustained 4 hours prior. He reports mild pain and swelling, but his neurovascular status appears intact, and he has full active range o

Accepted Answer

B. Perform immediate surgical exploration and debridement, regardless of mild symptoms.

Question 4

During the initial surgical debridement of a high-pressure injection injury to the ring finger, the surgeon needs to achieve wide exposure of the flexor tendon sheath, neurovascular bundles, and joint capsule while minimizing damage to critical struc

Accepted Answer

C. Mid-axial incisions along the non-weight-bearing surfaces of the digit.

Question 5

A 60-year-old male presents with a high-pressure paint injection injury to his dominant index finger. He underwent immediate, aggressive surgical debridement and has been compliant with post-operative rehabilitation. Despite these efforts, he is conc

Accepted Answer

D. DIP Joint Contracture.

Question 6

A patient is 3 days post-operative following extensive debridement for a high-pressure hydraulic fluid injection injury to the middle finger, involving the DIP joint. The wounds are stable, and there are no signs of active infection. Based on the 'Po

Accepted Answer

C. Very gentle, protected active range of motion (AROM) of the affected DIP joint.

Question 7

A 40-year-old mechanic sustained a high-pressure diesel fuel injection injury to his ring finger 8 months ago. He underwent initial debridement and has since completed an intensive 6-month hand therapy program, including dynamic splinting and scar ma

Accepted Answer

C. Perform surgical tenolysis of the FDP tendon and volar plate release/capsulotomy.

Question 8

A 28-year-old factory worker presents with a suspected high-pressure injection injury to his ring finger, sustained 2 hours ago. The entry wound is small, and he reports only mild discomfort. To aid in pre-operative planning and identify the extent o

Accepted Answer

D. X-rays.

Question 9

A 38-year-old male presents with a high-pressure injection injury to his middle finger. The emergency physician is attempting to ascertain the likely prognosis and potential for severe tissue damage. Based on the 'Introduction & Epidemiology' and 'Su

Accepted Answer

E. Paint and paint thinner mixtures.

Question 10

A 40-year-old male presents with a high-pressure grease injection injury to his ring finger. He has a history of uncontrolled diabetes, is currently febrile (101.5°F), and has a white blood cell count of 18,000/µL, but is hemodynamically stable. Base

Accepted Answer

C. Immediate surgical debridement is indicated, as there are virtually no absolute contraindications for primary HPII management.

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Key Takeaway