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External Fixation as a Bridge to Intramedullary Nailing for Patients with Multiple Injuries and with Femur Fractures: Damage Control Orthopedics.

·J Trauma·2000·523 citations·Trauma
DOI·PubMed
SummaryAbstract on PubMed →

This retrospective cohort study from the R. Adams Cowley Shock Trauma Center formally describes damage control orthopedics for femoral shaft fractures. It asks whether temporary external fixation can safely stabilize severely injured patients until they are physiologically ready for definitive intramedullary nailing. 43 patients who received staged fixation were compared to 281 who underwent primary IMN between 1995 and 1998.

Study Snapshot

Design
Retrospective cohort
Setting: Single center, R. Adams Cowley Shock Trauma Center, Baltimore
Funding: None
Objective
Whether temporary external fixation bridging to IMN is safe for multiply injured femur fracture patients
Outcome(s)
Mortality, hospital LOS, and discharge disposition
Subjects
324 patients with femur fractures (EF n=43, IMN n=281)
  • 43Primary external fixation, converted to IMN at mean 4.8 days
  • 281Primary intramedullary nailing
Inclusion
  • Acute femur fracture
  • Treated primarily with EF or IMN
Follow-up
Hospital discharge only
Statistics
Fisher's exact testStudent's t testWilcoxon rank-sum testShapiro-Wilk test

Key Findings

  • The two groups were not comparable — EF was explicitly reserved for the most physiologically marginal patients, with an ISS of 26.8 vs. 16.8, GCS of 11 vs. 14.2, shock on arrival in 17% vs. 3%, and nearly double the 24-hour fluid requirements (11,975 mL vs. 6,213 mL).
  • External fixation imposed a fraction of the physiologic cost of IMN — 35 minutes and 90 mL blood loss versus 135 minutes and 400 mL — with zero episodes of intraoperative hypotension or hypoxia across all 43 EF cases.
  • Most EF patients carried multiple simultaneous contraindications to primary IMN, underscoring that the sickest patients frequently have the most reasons to delay definitive fixation:
    –Hemodynamic instability: 65%
    –Thoracoabdominal injury: 51%
    –Head injury: 46%
    –Other severe injuries: 46%
  • 81% of EF patients (35/43) converted successfully to IMN at a mean of 4.8 days, with rare orthopedic complications — one pin-site bleed, one osteomyelitis, one hardware failure, and no complications in 86% of patients.
  • All four deaths in the EF group were attributable to head injury or multiorgan failure, not to the fracture management strategy — directly supporting the premise that staged fixation does not add mortality risk in this population.
Board PearlIn polytrauma patients unfit for primary IMN, temporary external fixation takes 35 minutes and 90 mL blood loss — this is damage control orthopedics.

Clinical Relevance

A multiply injured patient arrives with a femoral shaft fracture, a GCS of 10, systolic blood pressure of 80 mmHg, and a CT showing pulmonary contusions. The question is not whether to stabilize the femur — it is whether you can afford the physiologic cost of doing it definitively right now.

This paper is why damage control orthopedics exists as a formal concept. Before Scalea's work, the dominant paradigm was early total care. Fix everything acutely, because delay increases pulmonary complications. This paper challenged that dogma by showing that in the most unstable patients, the surgery itself can be the second hit that tips the patient into irreversible decompensation.

When you see a polytrauma patient with femur fracture who is hemodynamically unstable, coagulopathic, has a significant head injury, or requires emergent torso surgery, external fixation in 35 minutes with 90 mL blood loss buys you the time to resuscitate before returning to the OR for IMN. The decision to proceed with IMN should be physiologically gated: lactate normalized, coagulopathy corrected, intracranial pressure controlled.

The practical ceiling for staged fixation is roughly 5–7 days. Beyond that, pin-tract colonization raises infection risk at the time of IMN conversion. Historical series with prolonged EF reported infection rates as high as 44%, dropping below 6% when conversion was performed early.

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|

External Fixation as a Bridge to Intramedullary Nailing for Patients with Multiple Injuries and with Femur Fractures: Damage Control Orthopedics.

·J Trauma·2000·523 citations·Trauma
DOI·PubMed
SummaryAbstract on PubMed →

This retrospective cohort study from the R. Adams Cowley Shock Trauma Center formally describes damage control orthopedics for femoral shaft fractures. It asks whether temporary external fixation can safely stabilize severely injured patients until they are physiologically ready for definitive intramedullary nailing. 43 patients who received staged fixation were compared to 281 who underwent primary IMN between 1995 and 1998.

Study Snapshot

Design
Retrospective cohort
Setting: Single center, R. Adams Cowley Shock Trauma Center, Baltimore
Funding: None
Objective
Whether temporary external fixation bridging to IMN is safe for multiply injured femur fracture patients
Outcome(s)
Mortality, hospital LOS, and discharge disposition
Subjects
324 patients with femur fractures (EF n=43, IMN n=281)
  • 43Primary external fixation, converted to IMN at mean 4.8 days
  • 281Primary intramedullary nailing
Inclusion
  • Acute femur fracture
  • Treated primarily with EF or IMN
Follow-up
Hospital discharge only
Statistics
Fisher's exact testStudent's t testWilcoxon rank-sum testShapiro-Wilk test

Key Findings

  • The two groups were not comparable — EF was explicitly reserved for the most physiologically marginal patients, with an ISS of 26.8 vs. 16.8, GCS of 11 vs. 14.2, shock on arrival in 17% vs. 3%, and nearly double the 24-hour fluid requirements (11,975 mL vs. 6,213 mL).
  • External fixation imposed a fraction of the physiologic cost of IMN — 35 minutes and 90 mL blood loss versus 135 minutes and 400 mL — with zero episodes of intraoperative hypotension or hypoxia across all 43 EF cases.
  • Most EF patients carried multiple simultaneous contraindications to primary IMN, underscoring that the sickest patients frequently have the most reasons to delay definitive fixation:
    –Hemodynamic instability: 65%
    –Thoracoabdominal injury: 51%
    –Head injury: 46%
    –Other severe injuries: 46%
  • 81% of EF patients (35/43) converted successfully to IMN at a mean of 4.8 days, with rare orthopedic complications — one pin-site bleed, one osteomyelitis, one hardware failure, and no complications in 86% of patients.
  • All four deaths in the EF group were attributable to head injury or multiorgan failure, not to the fracture management strategy — directly supporting the premise that staged fixation does not add mortality risk in this population.
Board PearlIn polytrauma patients unfit for primary IMN, temporary external fixation takes 35 minutes and 90 mL blood loss — this is damage control orthopedics.

Clinical Relevance

A multiply injured patient arrives with a femoral shaft fracture, a GCS of 10, systolic blood pressure of 80 mmHg, and a CT showing pulmonary contusions. The question is not whether to stabilize the femur — it is whether you can afford the physiologic cost of doing it definitively right now.

This paper is why damage control orthopedics exists as a formal concept. Before Scalea's work, the dominant paradigm was early total care. Fix everything acutely, because delay increases pulmonary complications. This paper challenged that dogma by showing that in the most unstable patients, the surgery itself can be the second hit that tips the patient into irreversible decompensation.

When you see a polytrauma patient with femur fracture who is hemodynamically unstable, coagulopathic, has a significant head injury, or requires emergent torso surgery, external fixation in 35 minutes with 90 mL blood loss buys you the time to resuscitate before returning to the OR for IMN. The decision to proceed with IMN should be physiologically gated: lactate normalized, coagulopathy corrected, intracranial pressure controlled.

The practical ceiling for staged fixation is roughly 5–7 days. Beyond that, pin-tract colonization raises infection risk at the time of IMN conversion. Historical series with prolonged EF reported infection rates as high as 44%, dropping below 6% when conversion was performed early.

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