Physical Medicine and Rehabilitation for Posterior Cruciate Ligament Injury Workup

Updated: Nov 29, 2021
  • Author: Jawad Bhatti, MD; Chief Editor: Consuelo T Lorenzo, MD  more...
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Workup

Laboratory Studies

Laboratory studies include the following:

  • Complete blood cell (CBC)
  • C-reactive protein (CRP)
  • Comprehensive metabolic panel (CMP)
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Imaging Studies

See the list below:

  • Magnetic resonance imaging (MRI) has high sensitivity and specificity in the diagnosis of posterior cruciate ligament (PCL) injury. MRI is found to be 80% sensitive and 97% specific in the diagnosis of complete PCL tears. MRI can also yield information about the extent of the injury. [15, 17, 18]

  • For direct visualization of the PCL, diagnostic arthroscopy can be performed.

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Other Tests

If effusion is present, knee aspiration should be conducted to rule out causes of effusion other than posterior cruciate ligament (PCL) injury.

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Procedures

After aspiration of the knee joint, injection with a steriod may be considered if oral medications are not effective in pain management.

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Histologic Findings

The posterior cruciate ligament (PCL) is composed of type I collagen. Electron microscopy has demonstrated that the mean fibril cross-sectional area decreases in diameter from the proximal to the distal portion of the PCL.

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