In which pattern of pelvic ring injury is application of an anterior external fixator with frame compression contraindicated, because it worsens the deformity and crushes the internal viscera?
- A Lateral compression Type I ✓
- B Anterior-posterior compression Type II
- C Vertical shear
- D Combined mechanism
Correct answer: A. Lateral compression Type I
Explanation
In lateral compression injuries the hemipelvis is internally rotated and the pelvic volume is already reduced. Compressing further with an anterior frame drives the internal rotation deeper, worsens visceral compression, and can aggravate associated hemorrhage from venous plexus injury. Compression frames are appropriate for open book (APC) injuries where they close the diastasis, but lateral compression needs distraction or internal fixation instead.
Reference: Rockwood and Green's Fractures in Adults, 9th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.