Pelvic Fractures

Question 1

Bruce, VCOT, 2014:
Ilial fractures - DCP vs LCP

Biomechanical differences?

Answer 1

Bruce, VCOT, 2014:

No differences in mode of failure, displacement at failure or ultimate load at failure

Question 2

Krebs, Vet Surg, 2014:
Feline ilial fractures - bone plate +/- IM pin

Biomechanical advantage of the addition of an IM pin?

Answer 2

Krebs, Vet Surg, 2014:

No biomechanical advantage of adding an IM pin to ilial fractures stabilized with bone plates

Question 3

Stieger-Vanegas, VCOT, 2015:

1. What fractures are more accurately diagnosed with CT compared to radiography?
2. What fractures are diagnosed with similar accuracy with either CT or radiography?
3. How can radiography be improved for diagnosis of pelvic fractures when CT is not available?

Answer 3

Stieger-Vanegas, VCOT, 2015:

1. Sacral fractures (especially sacral body fractures), ischiadic table fractures and pubic fractures were more accurately diagnosed with CT than radiography
2. Fractures of the acetabulum and iliac body, and coxofemoral and sacroiliac joint luxation or subluxation were diagnosed with similar accuracy using CT and radiography
3. Right and left lateral oblique radiographs may aid in accurately diagnosing pelvic fractures when CT is not available

Question 4

Schmierer, Vet Surg, 2015:
Lateral plating of feline ilial fractures

Screw loosening rates for DCP vs single locking plate vs double locking plate?

Answer 4

Schmierer, Vet Surg, 2015:

50% screw loosening rate for DCP, 8% screw loosening rate for single locking plate fixation, and 0% screw loosening rate for double locking plate fixation

Question 5

Hoffberg, JVECC, 2016:

1. Distribution of pelvic fractures?
2. What % had concurrent intra-abdominal injury?
3. What fractures are more likely to be associated with concurrent intra-abdominal injury?
4. Overall survival to discharge?

Answer 5

Hoffberg, JVECC, 2016:

1. 90% pubic fractures, 81% ischial fractures, 58% SI luxation, 43% ilial fractures, 30% acetabular fractures, 13% sacral fractures
2. 37% had concurrent intra-abdominal injury
3. Sacral fractures are more likely to be associated with concurrent intra-abdominal injury
4. Overall survival to discharge: 89%

Question 6

Singh, VCOT, 2016:
SI luxation repair

1. Which approach was associated with better post-op reduction?
2. Screw loosening rate for dorsolateral vs ventrolateral approaches?
3. What % of screws were properly placed within the sacral body?

Answer 6

Singh, VCOT, 2016:

1. Dorsolateral approach had better post-op reduction
2. Screw loosening rate: 5% for dorsolateral approach vs 8% for ventrolateral approach
3. 70-80% of screws were properly placed within the sacral body

Question 7

Dejardin, VCOT, 2016:
SI lag screw fixation

1. Which technique provided more accurate and consistent sacral screw placement - minimally invasive osteosynthesis or ORIF?
2. What was the trend for the screws in the ORIF group?

Answer 7

Dejardin, VCOT, 2016:

1. Minimally invasive osteosynthesis fixation provided more accurate and consistent sacral screw placement than ORIF
2. There was a trend toward a cranioventral orientation of screws in the ORIF group

Question 8

Silveira, VCOT, 2017:
SI luxation repair in cats

1. Benefit(s) of intra-op radiology?
2. What % of screws in the group without intra-op radiology exited the sacrum?
3. What % of screws in the group with intra-op radiology exited the sacrum?
4. What was the % of sacral width purchased by the screw in the group without intra-op radiology vs the group with intra-op radiology?

Answer 8

Silveira, VCOT, 2017:

1. Intra-op radiology improved the position and sacral purchase of lag screws
2. 47% of the screws in the group without intra-op radiology exited the sacrum
3. 13% of the screws in the group with intra-op radiology exited the sacrum
4. Screws in the group without intra-op radiology achieved 55% sacral width purchase, whereas screws in the group with intra-op radiology achieved 71% sacral width purchase

Question 9

Dejardin, Vet Surg, 2018:
Minimally invasive lag screw fixation of SI luxation/fracture using the Sacroiliac Luxation Instrument System (SILIS)

What was the dorsoventral and craniocaudal screw deviation from an ideal trajectory?

Answer 9

Dejardin, Vet Surg, 2018:

0.9-3.8 degrees deviation from ideal trajectory

Question 10

Pratesi, VCOT, 2018:
Bilateral SI luxation

How was SI reduction and stabilization achieved?

Answer 10

Pratesi, VCOT, 2018:

Use of a single 2.7mm cortical self-tapping transsacral screw and nylon nut

Question 11

Schmierer, Vet Surg, 2019:
Feline ilial fractures - single locking plate vs single non-locking plate vs double non-locking plate

1. Which implants withstood more cycles?
2. Screw loosening occurred in which constructs?
3. Which constructs were superior?

Answer 11

Schmierer, Vet Surg, 2019:

1. Locking implants withstood more cycles
2. Screw loosening occurred only in the non-locking constructs
3. Single locking constructs were superior to single non-locking constructs, but double non-locking constructs offered a strong alternative