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ABFAS BOARD EXAM/ ABFAS BOARD EXAM PREPARATION/ABFAS
BOARD EXAM 2026/2027 PRACTICE ACTUAL EXAM 420 QUESTIONS
AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) |ALREADY GRADED A+.
Effects of RA on STJ - ......ANSWER........30-40% of RA patients affected Creates Stiffness
Unsteady gate
Eosinophilia is associated with what disease? - ......ANSWER........PVD
Estimated half-life of heparin - ......ANSWER........90 minutes although dose depended.
Some sites say 3-4 hours
First joint fused in a triple arthrodsis? - ......ANSWER........STJ
Fixation for mildly displaced intraarticular fracture of the styloid process of 5th met?
- ......ANSWER........tension band wiring
Genu varum is normal until what age? - ......ANSWER........2 years old
Genu varum is relatively normal until what age? - ......ANSWER........2 years
Good combo for conscious sedation? - ......ANSWER........fentanyl and midazolam (versed)
Governing principle that allows gradual distraction of bone/soft tissues
- ......ANSWER........tension-stress effect
Guidelines for crutch sizing - ......ANSWER........elbows flexed 20-30 degrees top notch to
axilla 6 cm (2-3 finger widths) tip of crutch should be 6 inches from front of the foot
Guidelines for insulin morning of surgery - ......ANSWER........1/2 dose of basil (slow acting)
hold fast acting insulin
Guidelines for shifting from insulin infusion to subQ insulin - ......ANSWER........if patient
can take orally (food) shift to subQ insulin 1-2 hours post op
Hematogenous osteomyelitis is most commonly beginning at which part of the bone?
- ......ANSWER........metaphysis
Hi nelson - ......ANSWER........lol
,2 of 29
History of MI automatically puts you at what ASA classification? - ......ANSWER........ASA 3
How can you treat a hyper vascular nonunion? - ......ANSWER........bone stim ORIF
Do not do early weightbearing
How do you take a calcaneal axial radiograph? - ......ANSWER........supine or leg fully
extended. Image receptor centered to ankle with plantar foot perpendicular to it. Central
ray directed 40 degrees cephalad to long axis of foot. Enter midline at base of 3rd
metatarsal
How does cartilage die (leading to arthritis) after ankle fracture? - ......ANSWER........initial
superficial zone cartilage death occurs via necrosis at the fracture sites.
How does cocaine cause vasoconstriction - ......ANSWER........potentiates the effect of
norepinephrine, causing vasoconstriction.
How does cocaine cause vasoconstriction? - ......ANSWER........potentiates
norepinephrine
How does propofol cause hypotension? - ......ANSWER........Direct myocardial depression
Arterial vasodilation Venous vasodilation
How is LMWH excreted? - ......ANSWER........through the kidneys; should be avoided in
those with kidney failure
How is LMWH metabolized? - ......ANSWER........in the kidney
How long after administration is morphine the most effective? - ......ANSWER........30-60
minutes
How long after callous distraction should ex-fix remain on? - ......ANSWER........2-4x longer
than it took to perform the distraction.
If it took 2 weeks it should stay on for 4-8 weeks more.
how long is someone in an ex-fix for ankle arthrodiastasis? - ......ANSWER........minimum
12 weeks
How long should a patient be NWB after gastric recession - ......ANSWER........4-6 weeks
How long should abx be stopped prior to bone biopsy? - ......ANSWER........48 hours
, 3 of 29
How long should Ex fix remain after brachy met surgery? - ......ANSWER........After the
distraction is complete, wait 2-4x for time it took to get the desired length.
How many angiosomes are on the foot? ....ANSWER........6
Where do they originate from? -.... ANSWER.... posterior tibial artery anterior tibial artery
peroneal artery
How many articular faciets in 1st MPJ joint capsule? - ......ANSWER........6
Metatarsal head base of proximal phalanx Surface of medial sesamoid 1st metatarsal
articular surface of lateral sesamoid 1st metatarsal articular surface.
How many degrees is the hip flexed at heel strike? (start of contact phase)
- ......ANSWER........25-35 degrees
How much lengthening can you get with a V-Y plasty? - ......ANSWER........20%
How often should the patient move positions to avoid pressure ulcers?
- ......ANSWER........every 2 hours at least.
Hypoparathyroidism will cause an increase in what? - ......ANSWER........increased
phosphorous decreased calcium
Ideal weightbearing status of arthrodiastasis - ......ANSWER........full weightbearing
If a bone lesion doesn't change after __years, it is considered benign and does not need to
be regularly imaged? - ......ANSWER........2 years
If you see an aneurysmal bone cyst, how would you treat it? - ......ANSWER........in adults,
you should refer to oncology.
Important shoe modifications for treatment of flat foot. - ......ANSWER........steel shanked
shoe Reinforced heel counters
Indication for peroneal longus to peroneus brevis tenodesis - ......ANSWER........1st
metatarsal overload
Initial test for HIV - ......ANSWER........ELISA
Insertion of EDB - ......ANSWER........Extensor apparatus near base of proximal phalanx.
ABFAS BOARD EXAM/ ABFAS BOARD EXAM PREPARATION/ABFAS
BOARD EXAM 2026/2027 PRACTICE ACTUAL EXAM 420 QUESTIONS
AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) |ALREADY GRADED A+.
Effects of RA on STJ - ......ANSWER........30-40% of RA patients affected Creates Stiffness
Unsteady gate
Eosinophilia is associated with what disease? - ......ANSWER........PVD
Estimated half-life of heparin - ......ANSWER........90 minutes although dose depended.
Some sites say 3-4 hours
First joint fused in a triple arthrodsis? - ......ANSWER........STJ
Fixation for mildly displaced intraarticular fracture of the styloid process of 5th met?
- ......ANSWER........tension band wiring
Genu varum is normal until what age? - ......ANSWER........2 years old
Genu varum is relatively normal until what age? - ......ANSWER........2 years
Good combo for conscious sedation? - ......ANSWER........fentanyl and midazolam (versed)
Governing principle that allows gradual distraction of bone/soft tissues
- ......ANSWER........tension-stress effect
Guidelines for crutch sizing - ......ANSWER........elbows flexed 20-30 degrees top notch to
axilla 6 cm (2-3 finger widths) tip of crutch should be 6 inches from front of the foot
Guidelines for insulin morning of surgery - ......ANSWER........1/2 dose of basil (slow acting)
hold fast acting insulin
Guidelines for shifting from insulin infusion to subQ insulin - ......ANSWER........if patient
can take orally (food) shift to subQ insulin 1-2 hours post op
Hematogenous osteomyelitis is most commonly beginning at which part of the bone?
- ......ANSWER........metaphysis
Hi nelson - ......ANSWER........lol
,2 of 29
History of MI automatically puts you at what ASA classification? - ......ANSWER........ASA 3
How can you treat a hyper vascular nonunion? - ......ANSWER........bone stim ORIF
Do not do early weightbearing
How do you take a calcaneal axial radiograph? - ......ANSWER........supine or leg fully
extended. Image receptor centered to ankle with plantar foot perpendicular to it. Central
ray directed 40 degrees cephalad to long axis of foot. Enter midline at base of 3rd
metatarsal
How does cartilage die (leading to arthritis) after ankle fracture? - ......ANSWER........initial
superficial zone cartilage death occurs via necrosis at the fracture sites.
How does cocaine cause vasoconstriction - ......ANSWER........potentiates the effect of
norepinephrine, causing vasoconstriction.
How does cocaine cause vasoconstriction? - ......ANSWER........potentiates
norepinephrine
How does propofol cause hypotension? - ......ANSWER........Direct myocardial depression
Arterial vasodilation Venous vasodilation
How is LMWH excreted? - ......ANSWER........through the kidneys; should be avoided in
those with kidney failure
How is LMWH metabolized? - ......ANSWER........in the kidney
How long after administration is morphine the most effective? - ......ANSWER........30-60
minutes
How long after callous distraction should ex-fix remain on? - ......ANSWER........2-4x longer
than it took to perform the distraction.
If it took 2 weeks it should stay on for 4-8 weeks more.
how long is someone in an ex-fix for ankle arthrodiastasis? - ......ANSWER........minimum
12 weeks
How long should a patient be NWB after gastric recession - ......ANSWER........4-6 weeks
How long should abx be stopped prior to bone biopsy? - ......ANSWER........48 hours
, 3 of 29
How long should Ex fix remain after brachy met surgery? - ......ANSWER........After the
distraction is complete, wait 2-4x for time it took to get the desired length.
How many angiosomes are on the foot? ....ANSWER........6
Where do they originate from? -.... ANSWER.... posterior tibial artery anterior tibial artery
peroneal artery
How many articular faciets in 1st MPJ joint capsule? - ......ANSWER........6
Metatarsal head base of proximal phalanx Surface of medial sesamoid 1st metatarsal
articular surface of lateral sesamoid 1st metatarsal articular surface.
How many degrees is the hip flexed at heel strike? (start of contact phase)
- ......ANSWER........25-35 degrees
How much lengthening can you get with a V-Y plasty? - ......ANSWER........20%
How often should the patient move positions to avoid pressure ulcers?
- ......ANSWER........every 2 hours at least.
Hypoparathyroidism will cause an increase in what? - ......ANSWER........increased
phosphorous decreased calcium
Ideal weightbearing status of arthrodiastasis - ......ANSWER........full weightbearing
If a bone lesion doesn't change after __years, it is considered benign and does not need to
be regularly imaged? - ......ANSWER........2 years
If you see an aneurysmal bone cyst, how would you treat it? - ......ANSWER........in adults,
you should refer to oncology.
Important shoe modifications for treatment of flat foot. - ......ANSWER........steel shanked
shoe Reinforced heel counters
Indication for peroneal longus to peroneus brevis tenodesis - ......ANSWER........1st
metatarsal overload
Initial test for HIV - ......ANSWER........ELISA
Insertion of EDB - ......ANSWER........Extensor apparatus near base of proximal phalanx.
