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Question 10301

Topic: 2. Trauma

  • Figure 67 shows the AP radiograph of both knees of a 26-year-old woman. A review of the patient’s medical record will most likely reveal a history of
. Trauma
. Hemophilia
. Reiter’s syndrome
. Rheumatoid arthritis
. Systemic lupus erythematosus
. Cast immobilization for 6 weeks
. Activity modification and re-evaluation in 2 months
. Internal fixation with or without bone grafting
. Retrograde drilling of the defect without articular cartilage penetration
. Drilling of the defect directly through the articular cartilage
. repair or reconstruction of the medial collateral ligament
. repair or reconstruction of the medialand lateral collateral ligaments
. immobilization for 5 days or less
. immobilization for 14 days
. immobilization for 25 days
. Cystinosis
. Hypophosphatemia
. Renal osteodystrophy
. Primary hyperparathyroidism
. Nutritional vitamin D deficiency
. Lateral meniscus tear
. Popliteus tenosynovitis
. Iliotibial band friction syndrome
. Peroneal nerve entrapment
. Biceps tendinitis
. Observation
. Removal of the prosthetic components
. Operative exploration and decompression of the peroneal nerve
. Nerve conduction velocity studies
. Loosening of the primary dressings and knee flexion to 30 degrees
. I
. II
!. III
". decreased tissue tension
#. decreased abductor lever arm
$. decreased joint reaction force
%. increased body weight over lever arm
&. increased polyethylene wear rate
'. recurrent traumatic anterior dislocation
(. recurrent traumatic posterior dislocation
). traumatic subluxation with no previous dislocation
*. traumatic anterior subluxation
+. atraumatic involuntary subluxation
,. radial
-. axillary
.. suprascapular
/. thoracodorsal
0. long thoracic
1. Flexion
2. Extension
3. Axial rotation
4. Left lateral bending
5. Right lateral bending
6. Skin
7. Lung
8. Brain
9. Heart
:. Kidney
;. Thoracoacromial, lateral thoracic, subscapular
<. Thoracoacromial, anterior humeral circumflex, posterior humeral circumflex
=. Posterior humeral circumflex, subscapular, thoracacromial
>. Subscapular, thoracacromial, anterior humeral circumflex
?. Lateral thoracic, anterior humeral circumflex, thoracacromial
@. Respondeat superior
A. Indemnity agreement
B. Hold harmless agreement- attempt to shift liability from company to physician
C. Comparative negligence-% of involvement
D. Contributory negligence- resident contributed to the negligence
E. t-type
F. both column
G. transverse
H. anterior column
I. anterior column posterior hemitransverse
J. Posterior interosseous
K. Anterior interosseous
L. Radial
M. Median
N. Ulnar
O. Shock from hypovolemia
P. Associated rupture of the bladder
Q. Arterial bleeding on pelvic angiogram
R. Presence of a hematoma in the perineum and scrotum
S. Fractures of both the anterior and posterior pelvic ring

Correct Answer & Explanation

. Trauma


Explanation

Question 10302

Topic: Pelvic & Acetabular Trauma

Figure 68 shows the MRI scan of a 13-year-old boy who has had knee pain and swelling following training lessons for ski racing for the past 6 months. The only abnormal finding on physical examination is an effusion. Management should consist of

. Cast immobilization for 6 weeks
. Activity modification and re-evaluation in 2 months
. Internal fixation with or without bone grafting
. Retrograde drilling of the defect without articular cartilage penetration
. Drilling of the defect directly through the articular cartilage
. repair or reconstruction of the medial collateral ligament
. repair or reconstruction of the medialand lateral collateral ligaments
. immobilization for 5 days or less
. immobilization for 14 days
. immobilization for 25 days
. Cystinosis
. Hypophosphatemia
. Renal osteodystrophy
. Primary hyperparathyroidism
. Nutritional vitamin D deficiency
. Lateral meniscus tear
. Popliteus tenosynovitis
. Iliotibial band friction syndrome
. Peroneal nerve entrapment
. Biceps tendinitis
. Observation
. Removal of the prosthetic components
. Operative exploration and decompression of the peroneal nerve
. Nerve conduction velocity studies
. Loosening of the primary dressings and knee flexion to 30 degrees
. I
. II
. III
. decreased tissue tension
. decreased abductor lever arm
. decreased joint reaction force
. increased body weight over lever arm
!. increased polyethylene wear rate
". recurrent traumatic anterior dislocation
#. recurrent traumatic posterior dislocation
$. traumatic subluxation with no previous dislocation
%. traumatic anterior subluxation
&. atraumatic involuntary subluxation
'. radial
(. axillary
). suprascapular
*. thoracodorsal
+. long thoracic
,. Flexion
-. Extension
.. Axial rotation
/. Left lateral bending
0. Right lateral bending
1. Skin
2. Lung
3. Brain
4. Heart
5. Kidney
6. Thoracoacromial, lateral thoracic, subscapular
7. Thoracoacromial, anterior humeral circumflex, posterior humeral circumflex
8. Posterior humeral circumflex, subscapular, thoracacromial
9. Subscapular, thoracacromial, anterior humeral circumflex
:. Lateral thoracic, anterior humeral circumflex, thoracacromial
;. Respondeat superior
<. Indemnity agreement
=. Hold harmless agreement- attempt to shift liability from company to physician
>. Comparative negligence-% of involvement
?. Contributory negligence- resident contributed to the negligence
@. t-type
A. both column
B. transverse
C. anterior column
D. anterior column posterior hemitransverse
E. Posterior interosseous
F. Anterior interosseous
G. Radial
H. Median
I. Ulnar
J. Shock from hypovolemia
K. Associated rupture of the bladder
L. Arterial bleeding on pelvic angiogram
M. Presence of a hematoma in the perineum and scrotum
N. Fractures of both the anterior and posterior pelvic ring

Correct Answer & Explanation

. Cast immobilization for 6 weeks


Explanation

Question 10303

Topic: Pelvic & Acetabular Trauma

  • Following closed reduction for the injury shown in Figures 69a and 69b, treatment should consist of

. repair or reconstruction of the medial collateral ligament
. repair or reconstruction of the medialand lateral collateral ligaments
. immobilization for 5 days or less
. immobilization for 14 days
. immobilization for 25 days
. Cystinosis
. Hypophosphatemia
. Renal osteodystrophy
. Primary hyperparathyroidism
. Nutritional vitamin D deficiency
. Lateral meniscus tear
. Popliteus tenosynovitis
. Iliotibial band friction syndrome
. Peroneal nerve entrapment
. Biceps tendinitis
. Observation
. Removal of the prosthetic components
. Operative exploration and decompression of the peroneal nerve
. Nerve conduction velocity studies
. Loosening of the primary dressings and knee flexion to 30 degrees
. I
. II
. III
. decreased tissue tension
. decreased abductor lever arm
. decreased joint reaction force
. increased body weight over lever arm
. increased polyethylene wear rate
. recurrent traumatic anterior dislocation
. recurrent traumatic posterior dislocation
. traumatic subluxation with no previous dislocation
. traumatic anterior subluxation
!. atraumatic involuntary subluxation
". radial
#. axillary
$. suprascapular
%. thoracodorsal
&. long thoracic
'. Flexion
(. Extension
). Axial rotation
*. Left lateral bending
+. Right lateral bending
,. Skin
-. Lung
.. Brain
/. Heart
0. Kidney
1. Thoracoacromial, lateral thoracic, subscapular
2. Thoracoacromial, anterior humeral circumflex, posterior humeral circumflex
3. Posterior humeral circumflex, subscapular, thoracacromial
4. Subscapular, thoracacromial, anterior humeral circumflex
5. Lateral thoracic, anterior humeral circumflex, thoracacromial
6. Respondeat superior
7. Indemnity agreement
8. Hold harmless agreement- attempt to shift liability from company to physician
9. Comparative negligence-% of involvement
:. Contributory negligence- resident contributed to the negligence
;. t-type
<. both column
=. transverse
>. anterior column
?. anterior column posterior hemitransverse
@. Posterior interosseous
A. Anterior interosseous
B. Radial
C. Median
D. Ulnar
E. Shock from hypovolemia
F. Associated rupture of the bladder
G. Arterial bleeding on pelvic angiogram
H. Presence of a hematoma in the perineum and scrotum
I. Fractures of both the anterior and posterior pelvic ring

Correct Answer & Explanation

. repair or reconstruction of the medial collateral ligament


Explanation

Question 10304

Topic: Pelvic & Acetabular Trauma

A 3-year old child from an isolated mountain area is evaluated for multiple medical problems, including vomiting, loss of appetite, polyuria, and failure to thrive. History reveals the child was normal at birth. The parents, who appear healthy, are second cousins and have two other children who are normal. The parents state that they know of another family member who died at age 6 years after a similar medical history. Radiographs of the lower extremities show bowing of the long bones with cupping and widening of the physes. What is the most likely diagnosis?

. Cystinosis
. Hypophosphatemia
. Renal osteodystrophy
. Primary hyperparathyroidism
. Nutritional vitamin D deficiency
. Lateral meniscus tear
. Popliteus tenosynovitis
. Iliotibial band friction syndrome
. Peroneal nerve entrapment
. Biceps tendinitis
. Observation
. Removal of the prosthetic components
. Operative exploration and decompression of the peroneal nerve
. Nerve conduction velocity studies
. Loosening of the primary dressings and knee flexion to 30 degrees
. I
. II
. III
. decreased tissue tension
. decreased abductor lever arm
. decreased joint reaction force
. increased body weight over lever arm
. increased polyethylene wear rate
. recurrent traumatic anterior dislocation
. recurrent traumatic posterior dislocation
. traumatic subluxation with no previous dislocation
. traumatic anterior subluxation
. atraumatic involuntary subluxation
. radial
. axillary
. suprascapular
. thoracodorsal
!. long thoracic
". Flexion
#. Extension
$. Axial rotation
%. Left lateral bending
&. Right lateral bending
'. Skin
(. Lung
). Brain
*. Heart
+. Kidney
,. Thoracoacromial, lateral thoracic, subscapular
-. Thoracoacromial, anterior humeral circumflex, posterior humeral circumflex
.. Posterior humeral circumflex, subscapular, thoracacromial
/. Subscapular, thoracacromial, anterior humeral circumflex
0. Lateral thoracic, anterior humeral circumflex, thoracacromial
1. Respondeat superior
2. Indemnity agreement
3. Hold harmless agreement- attempt to shift liability from company to physician
4. Comparative negligence-% of involvement
5. Contributory negligence- resident contributed to the negligence
6. t-type
7. both column
8. transverse
9. anterior column
:. anterior column posterior hemitransverse
;. Posterior interosseous
<. Anterior interosseous
=. Radial
>. Median
?. Ulnar
@. Shock from hypovolemia
A. Associated rupture of the bladder
B. Arterial bleeding on pelvic angiogram
C. Presence of a hematoma in the perineum and scrotum
D. Fractures of both the anterior and posterior pelvic ring

Correct Answer & Explanation

. Cystinosis


Explanation

Question 10305

Topic: Pelvic & Acetabular Trauma

  • A 26 year-old marathon runner reports lateral knee pain after hill training. Examination reveals no effusion; and results of Ober’s test are positive. What is the most likely diagnosis?
. Lateral meniscus tear
. Popliteus tenosynovitis
. Iliotibial band friction syndrome
. Peroneal nerve entrapment
. Biceps tendinitis
. Observation
. Removal of the prosthetic components
. Operative exploration and decompression of the peroneal nerve
. Nerve conduction velocity studies
. Loosening of the primary dressings and knee flexion to 30 degrees
. I
. II
. III
. decreased tissue tension
. decreased abductor lever arm
. decreased joint reaction force
. increased body weight over lever arm
. increased polyethylene wear rate
. recurrent traumatic anterior dislocation
. recurrent traumatic posterior dislocation
. traumatic subluxation with no previous dislocation
. traumatic anterior subluxation
. atraumatic involuntary subluxation
. radial
. axillary
. suprascapular
. thoracodorsal
. long thoracic
. Flexion
. Extension
. Axial rotation
. Left lateral bending
!. Right lateral bending
". Skin
#. Lung
$. Brain
%. Heart
&. Kidney
'. Thoracoacromial, lateral thoracic, subscapular
(. Thoracoacromial, anterior humeral circumflex, posterior humeral circumflex
). Posterior humeral circumflex, subscapular, thoracacromial
*. Subscapular, thoracacromial, anterior humeral circumflex
+. Lateral thoracic, anterior humeral circumflex, thoracacromial
,. Respondeat superior
-. Indemnity agreement
.. Hold harmless agreement- attempt to shift liability from company to physician
/. Comparative negligence-% of involvement
0. Contributory negligence- resident contributed to the negligence
1. t-type
2. both column
3. transverse
4. anterior column
5. anterior column posterior hemitransverse
6. Posterior interosseous
7. Anterior interosseous
8. Radial
9. Median
:. Ulnar
;. Shock from hypovolemia
<. Associated rupture of the bladder
=. Arterial bleeding on pelvic angiogram
>. Presence of a hematoma in the perineum and scrotum
?. Fractures of both the anterior and posterior pelvic ring

Correct Answer & Explanation

. Lateral meniscus tear


Explanation

Question 10306

Topic: Pelvic & Acetabular Trauma

A patient in the recovery room has weakness of the extensor hallucis longus and tibialis anterior muscles following a total knee replacement. Initial management should consist of

. Observation
. Removal of the prosthetic components
. Operative exploration and decompression of the peroneal nerve
. Nerve conduction velocity studies
. Loosening of the primary dressings and knee flexion to 30 degrees
. I
. II
. III
. decreased tissue tension
. decreased abductor lever arm
. decreased joint reaction force
. increased body weight over lever arm
. increased polyethylene wear rate
. recurrent traumatic anterior dislocation
. recurrent traumatic posterior dislocation
. traumatic subluxation with no previous dislocation
. traumatic anterior subluxation
. atraumatic involuntary subluxation
. radial
. axillary
. suprascapular
. thoracodorsal
. long thoracic
. Flexion
. Extension
. Axial rotation
. Left lateral bending
. Right lateral bending
. Skin
. Lung
. Brain
. Heart
!. Kidney
". Thoracoacromial, lateral thoracic, subscapular
#. Thoracoacromial, anterior humeral circumflex, posterior humeral circumflex
$. Posterior humeral circumflex, subscapular, thoracacromial
%. Subscapular, thoracacromial, anterior humeral circumflex
&. Lateral thoracic, anterior humeral circumflex, thoracacromial
'. Respondeat superior
(. Indemnity agreement
). Hold harmless agreement- attempt to shift liability from company to physician
*. Comparative negligence-% of involvement
+. Contributory negligence- resident contributed to the negligence
,. t-type
-. both column
.. transverse
/. anterior column
0. anterior column posterior hemitransverse
1. Posterior interosseous
2. Anterior interosseous
3. Radial
4. Median
5. Ulnar
6. Shock from hypovolemia
7. Associated rupture of the bladder
8. Arterial bleeding on pelvic angiogram
9. Presence of a hematoma in the perineum and scrotum
:. Fractures of both the anterior and posterior pelvic ring

Correct Answer & Explanation

. Observation


Explanation

Question 10307

Topic: Pelvic & Acetabular Trauma

A 45-year-old woman has a deep soft-tissue mass in the thigh. The MRI scan Shows a 12-cm heterogenous mass that is deep to the fascia, and the CT scan Shows three small (5 to 10 mm) peripheral, noncalcified pulmonary nodules. What is the stage of disease according to the staging system of the Musculoskeletal Tumor Society?

1/. 1

2/. 2

. I
. II
. III
. decreased tissue tension
. decreased abductor lever arm
. decreased joint reaction force
. increased body weight over lever arm
. increased polyethylene wear rate
. recurrent traumatic anterior dislocation
. recurrent traumatic posterior dislocation
. traumatic subluxation with no previous dislocation
. traumatic anterior subluxation
. atraumatic involuntary subluxation
. radial
. axillary
. suprascapular
. thoracodorsal
. long thoracic
. Flexion
. Extension
. Axial rotation
. Left lateral bending
. Right lateral bending
. Skin
. Lung
. Brain
. Heart
. Kidney
. Thoracoacromial, lateral thoracic, subscapular
. Thoracoacromial, anterior humeral circumflex, posterior humeral circumflex
. Posterior humeral circumflex, subscapular, thoracacromial
. Subscapular, thoracacromial, anterior humeral circumflex
!. Lateral thoracic, anterior humeral circumflex, thoracacromial
". Respondeat superior
#. Indemnity agreement
$. Hold harmless agreement- attempt to shift liability from company to physician
%. Comparative negligence-% of involvement
&. Contributory negligence- resident contributed to the negligence
'. t-type
(. both column
). transverse
*. anterior column
+. anterior column posterior hemitransverse
,. Posterior interosseous
-. Anterior interosseous
.. Radial
/. Median
0. Ulnar
1. Shock from hypovolemia
2. Associated rupture of the bladder
3. Arterial bleeding on pelvic angiogram
4. Presence of a hematoma in the perineum and scrotum
5. Fractures of both the anterior and posterior pelvic ring

Correct Answer & Explanation

. I


Explanation

Question 10308

Topic: Pelvic & Acetabular Trauma

  • For which of the following conditions will a rehabilitation program for shoulder instability most likely result in a satisfactory response?
. recurrent traumatic anterior dislocation
. recurrent traumatic posterior dislocation
. traumatic subluxation with no previous dislocation
. traumatic anterior subluxation
. atraumatic involuntary subluxation
. radial
. axillary
. suprascapular
. thoracodorsal
. long thoracic
. Flexion
. Extension
. Axial rotation
. Left lateral bending
. Right lateral bending
. Skin
. Lung
. Brain
. Heart
. Kidney
. Thoracoacromial, lateral thoracic, subscapular
. Thoracoacromial, anterior humeral circumflex, posterior humeral circumflex
. Posterior humeral circumflex, subscapular, thoracacromial
. Subscapular, thoracacromial, anterior humeral circumflex
. Lateral thoracic, anterior humeral circumflex, thoracacromial
. Respondeat superior
. Indemnity agreement
. Hold harmless agreement- attempt to shift liability from company to physician
. Comparative negligence-% of involvement
. Contributory negligence- resident contributed to the negligence
. t-type
. both column
!. transverse
". anterior column
#. anterior column posterior hemitransverse
$. Posterior interosseous
%. Anterior interosseous
&. Radial
'. Median
(. Ulnar
). Shock from hypovolemia
*. Associated rupture of the bladder
+. Arterial bleeding on pelvic angiogram
,. Presence of a hematoma in the perineum and scrotum
-. Fractures of both the anterior and posterior pelvic ring

Correct Answer & Explanation

. recurrent traumatic anterior dislocation


Explanation

Question 10309

Topic: Pelvic & Acetabular Trauma

  • A branch of what nerve is at risk for injury when vigorous superior/medial retraction is applied to the interval between the teres minor and the infraspinatus during a posterior approach to the shoulder?
. radial
. axillary
. suprascapular
. thoracodorsal
. long thoracic
. Flexion
. Extension
. Axial rotation
. Left lateral bending
. Right lateral bending
. Skin
. Lung
. Brain
. Heart
. Kidney
. Thoracoacromial, lateral thoracic, subscapular
. Thoracoacromial, anterior humeral circumflex, posterior humeral circumflex
. Posterior humeral circumflex, subscapular, thoracacromial
. Subscapular, thoracacromial, anterior humeral circumflex
. Lateral thoracic, anterior humeral circumflex, thoracacromial
. Respondeat superior
. Indemnity agreement
. Hold harmless agreement- attempt to shift liability from company to physician
. Comparative negligence-% of involvement
. Contributory negligence- resident contributed to the negligence
. t-type
. both column
. transverse
. anterior column
. anterior column posterior hemitransverse
. Posterior interosseous
. Anterior interosseous
!. Radial
". Median
#. Ulnar
$. Shock from hypovolemia
%. Associated rupture of the bladder
&. Arterial bleeding on pelvic angiogram
'. Presence of a hematoma in the perineum and scrotum
(. Fractures of both the anterior and posterior pelvic ring

Correct Answer & Explanation

. radial


Explanation

Question 10310

Topic: Pelvic & Acetabular Trauma

Figures 70a and 70b show the sagittal MRI scan and axial CT of a patient who has decreased range of motion in the cervical spine. In which of the following directions would the cervical motion be most significantly limited?

. Flexion
. Extension
. Axial rotation
. Left lateral bending
. Right lateral bending
. Skin
. Lung
. Brain
. Heart
. Kidney
. Thoracoacromial, lateral thoracic, subscapular
. Thoracoacromial, anterior humeral circumflex, posterior humeral circumflex
. Posterior humeral circumflex, subscapular, thoracacromial
. Subscapular, thoracacromial, anterior humeral circumflex
. Lateral thoracic, anterior humeral circumflex, thoracacromial
. Respondeat superior
. Indemnity agreement
. Hold harmless agreement- attempt to shift liability from company to physician
. Comparative negligence-% of involvement
. Contributory negligence- resident contributed to the negligence
. t-type
. both column
. transverse
. anterior column
. anterior column posterior hemitransverse
. Posterior interosseous
. Anterior interosseous
. Radial
. Median
. Ulnar
. Shock from hypovolemia
. Associated rupture of the bladder
!. Arterial bleeding on pelvic angiogram
". Presence of a hematoma in the perineum and scrotum
#. Fractures of both the anterior and posterior pelvic ring

Correct Answer & Explanation

. Flexion


Explanation

Question 10311

Topic: Pelvic & Acetabular Trauma

A 32 yr old man with oxalosis is scheduled for a surgical treatment of spinal stenosis. Which of the following organs is most likely to show signs of systemic oxalosis during a preoperative assessment?

. Skin
. Lung
. Brain
. Heart
. Kidney
. Thoracoacromial, lateral thoracic, subscapular
. Thoracoacromial, anterior humeral circumflex, posterior humeral circumflex
. Posterior humeral circumflex, subscapular, thoracacromial
. Subscapular, thoracacromial, anterior humeral circumflex
. Lateral thoracic, anterior humeral circumflex, thoracacromial
. Respondeat superior
. Indemnity agreement
. Hold harmless agreement- attempt to shift liability from company to physician
. Comparative negligence-% of involvement
. Contributory negligence- resident contributed to the negligence
. t-type
. both column
. transverse
. anterior column
. anterior column posterior hemitransverse
. Posterior interosseous
. Anterior interosseous
. Radial
. Median
. Ulnar
. Shock from hypovolemia
. Associated rupture of the bladder
. Arterial bleeding on pelvic angiogram
. Presence of a hematoma in the perineum and scrotum
. Fractures of both the anterior and posterior pelvic ring

Correct Answer & Explanation

. Skin


Explanation

Question 10312

Topic: Pelvic & Acetabular Trauma

  • Which of the following lists the correct order of the branches of the axillary artery from proximal to distal?
. Thoracoacromial, lateral thoracic, subscapular
. Thoracoacromial, anterior humeral circumflex, posterior humeral circumflex
. Posterior humeral circumflex, subscapular, thoracacromial
. Subscapular, thoracacromial, anterior humeral circumflex
. Lateral thoracic, anterior humeral circumflex, thoracacromial
. Respondeat superior
. Indemnity agreement
. Hold harmless agreement- attempt to shift liability from company to physician
. Comparative negligence-% of involvement
. Contributory negligence- resident contributed to the negligence
. t-type
. both column
. transverse
. anterior column
. anterior column posterior hemitransverse
. Posterior interosseous
. Anterior interosseous
. Radial
. Median
. Ulnar
. Shock from hypovolemia
. Associated rupture of the bladder
. Arterial bleeding on pelvic angiogram
. Presence of a hematoma in the perineum and scrotum
. Fractures of both the anterior and posterior pelvic ring

Correct Answer & Explanation

. Thoracoacromial, lateral thoracic, subscapular


Explanation

Question 10313

Topic: Pelvic & Acetabular Trauma

  • Which of the following medicolegal relationships between an attending surgeon and a resident assistant applies when a patient files a malpractice suit relating to surgical complications following a total knee arthroplasty?
. Respondeat superior
. Indemnity agreement
. Hold harmless agreement- attempt to shift liability from company to physician
. Comparative negligence-% of involvement
. Contributory negligence- resident contributed to the negligence
. t-type
. both column
. transverse
. anterior column
. anterior column posterior hemitransverse
. Posterior interosseous
. Anterior interosseous
. Radial
. Median
. Ulnar
. Shock from hypovolemia
. Associated rupture of the bladder
. Arterial bleeding on pelvic angiogram
. Presence of a hematoma in the perineum and scrotum
. Fractures of both the anterior and posterior pelvic ring

Correct Answer & Explanation

. Respondeat superior


Explanation

Question 10314

Topic: 2. Trauma

  • The radiographs shown in Figures 71a through 71c, and the CT scan shown in Figure 71d reveal an acetabular fracture that should be classified as



. t-type
. both column
. transverse
. anterior column
. anterior column posterior hemitransverse
. Posterior interosseous
. Anterior interosseous
. Radial
. Median
. Ulnar
. Shock from hypovolemia
. Associated rupture of the bladder
. Arterial bleeding on pelvic angiogram
. Presence of a hematoma in the perineum and scrotum
. Fractures of both the anterior and posterior pelvic ring

Correct Answer & Explanation

. t-type


Explanation

Question 10315

Topic: 2. Trauma

  • What is the most common nerve injury following a Monteggia fracture-dislocation of the forearm in adults?
. Posterior interosseous
. Anterior interosseous
. Radial
. Median
. Ulnar
. Shock from hypovolemia
. Associated rupture of the bladder
. Arterial bleeding on pelvic angiogram
. Presence of a hematoma in the perineum and scrotum
. Fractures of both the anterior and posterior pelvic ring

Correct Answer & Explanation

. Posterior interosseous


Explanation

Question 10316

Topic: 2. Trauma

A 25-year-old male presents following a high-speed MVC with a closed midshaft femur fracture, bilateral pulmonary contusions, and a GCS of 7. His arterial blood gas reveals a pH of 7.21, lactate of 4.5 mmol/L, and PaO2/FiO2 ratio of 180. Which of the following is the most appropriate initial management of his femur fracture?

. Immediate reamed intramedullary nailing
. External fixation
. Skeletal traction and delayed surgery for 2 weeks
. Open reduction and internal fixation with a plate
. Non-reamed retrograde intramedullary nailing

Correct Answer & Explanation

. External fixation


Explanation

This patient is in an 'in extremis' or 'unstable' physiological state based on his acidosis, high lactate, severe head injury, and pulmonary contusions. Damage control orthopedics (DCO), which involves rapid external fixation, is indicated to minimize the second hit phenomenon and inflammatory burden.

Question 10317

Topic: 2. Trauma

A 32-year-old male sustains a closed tibia fracture and undergoes intramedullary nailing. Postoperatively, he complains of severe pain out of proportion to the injury, not relieved by opioids. Which of the following clinical signs is considered the most sensitive early indicator of acute compartment syndrome?

. Absence of distal pulses
. Pallor of the distal extremity
. Pain with passive stretch of the involved muscles
. Paresthesias in the distribution of the deep peroneal nerve
. Paralysis of the anterior compartment muscles

Correct Answer & Explanation

. Pain with passive stretch of the involved muscles


Explanation

Pain out of proportion to the injury and pain with passive stretch of the muscles traversing the affected compartment are the earliest and most sensitive clinical signs of acute compartment syndrome. Pulselessness, pallor, and paralysis are late, ominous signs of irreversible ischemia.

Question 10318

Topic: 2. Trauma

A 21-year-old male falls onto an outstretched hand and presents with anatomic snuffbox tenderness. Initial radiographs are negative, but repeat imaging 2 weeks later shows a non-displaced fracture of the proximal pole of the scaphoid. What is the primary reason this fracture pattern is at a high risk for avascular necrosis?

. The scaphoid relies entirely on the superficial palmar arch
. The proximal pole lacks any ligamentous attachments
. The blood supply enters distally and flows in a retrograde fashion
. The proximal pole is entirely intra-articular and bathed in synovial fluid
. The fracture disrupts the volar carpal branch of the radial artery exclusively

Correct Answer & Explanation

. The blood supply enters distally and flows in a retrograde fashion


Explanation

The primary blood supply to the scaphoid comes from branches of the radial artery that enter the dorsal ridge distally and flow in a retrograde fashion to supply the proximal pole. Fractures at the proximal pole completely disrupt this retrograde supply, leading to a high rate of avascular necrosis and nonunion.

Question 10319

Topic: 2. Trauma
A 40-year-old male sustains an anteroposterior compression (APC-III) pelvic ring injury and an associated perineal laceration with gross fecal contamination after a crushing industrial accident. Following application of a pelvic external fixator, his hemodynamics stabilize. What is the next most critical step in his management to reduce mortality?
. Immediate internal fixation of the pubic symphysis
. Diverting colostomy and perineal washout
. Angiography and embolization of the internal iliac arteries
. Retrograde urethrogram to assess for urologic injury
. Administration of intravenous bisphosphonates

Correct Answer & Explanation

. Diverting colostomy and perineal washout


Explanation

Open pelvic fractures with perineal or rectal involvement carry a very high risk of fatal sepsis. Once gross hemorrhage is controlled and the pelvic volume is stabilized, aggressive management of the contaminated wound via a diverting colostomy and thorough perineal debridement is critical to prevent overwhelming pelvic sepsis.

Question 10320

Topic: 2. Trauma

Which of the following pressure measurements is generally accepted as an absolute indication for emergent fasciotomy in a patient with a suspected acute compartment syndrome of the leg?

. Absolute compartment pressure greater than 15 mmHg
. Absolute compartment pressure greater than 20 mmHg
. Difference between systolic blood pressure and compartment pressure less than 30 mmHg
. Difference between diastolic blood pressure and compartment pressure less than 30 mmHg
. Difference between mean arterial pressure and compartment pressure less than 40 mmHg

Correct Answer & Explanation

. Difference between diastolic blood pressure and compartment pressure less than 30 mmHg


Explanation

The most reliable threshold for diagnosing acute compartment syndrome is a Delta P (diastolic blood pressure minus the measured compartment pressure) of less than 30 mmHg. Relying purely on absolute compartment pressures can lead to over-treatment in hypotensive patients or missed diagnoses in hypertensive patients.