Written by
Bernard Ramirez
Bernard Ramirez
Reviewed by
Bernard Ramirez

Lachman Test

Lachman Test is a reliable diagnostic tool used to assess the integrity of the ACL in the knee joint, manipulating the tibia bone. In contrast, the knee is flexed at a 20-30 degree angle.

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What is a Lachman Test?

A is a diagnostic tool used to evaluate the anterior cruciate ligament's (ACL) stability in the knee joint. A healthcare professional performs it like an orthopedic surgeon or physical therapist. It involves the manipulation of the tibia bone while the knee is flexed at a 20-30 degree angle.

During the test, the examiner stabilizes the femur bone with one hand while pulling the tibia forward with the other. The amount of forward movement is then compared to the opposite, unaffected knee. If the ACL is intact, the tibia should have minimal forward movement. If the ACL is torn or damaged, there will be abnormal movement.

Research has shown that the Lachman Test is one of the most reliable and accurate tests for diagnosing ACL injuries, with a reported sensitivity of 85-100% and specificity of 85-98%. However, the accuracy of the test can be affected by factors such as the skill and experience of the examiner, the patient's muscle relaxation and joint position, and the severity of the injury.

In addition to the traditional manual Lachman Test, some variations use devices such as arthrometers and accelerometers to measure the amount of anterior translation of the tibia. These tools can provide more objective and precise measurements but may not be as widely available or practical as the manual test.

Overall, the Lachman Test remains an essential tool for evaluating ACL injuries and is often used in conjunction with other clinical tests and imaging studies to guide treatment decisions.

Printable Lachman Test

Download Lachman Test to assess the integrity of the ACL in the knee joint

How does this printable Lachmans Test work?

The printable Lachman Test is a tool that healthcare professionals can use to assess the integrity and stability of the knee joint's anterior cruciate ligament (ACL). The test involves the manipulation of the tibia bone. At the same time, the knee is flexed at a 20-30 degree angle and is considered one of the most reliable tests for detecting ACL injuries. 

Here are the steps involved in using/filling the template:

  1. Print out the Lachman Test template: The printable Lachman Test is available online and can be printed out for use.
  2. Have the patient lie down: The patient should lie flat on their back with their knee bent to a 20-30 degree angle.
  3. Stabilize the femur bone: The examiner should use one hand to stabilize the femur bone while the other manipulates the tibia bone.
  4. Assess the amount of anterior translation: The examiner should gently pull the tibia bone forward to assess the amount of anterior translation or forward movement. This movement should be compared to the opposite, unaffected knee.
  5. Record the results: The amount of anterior translation should be recorded and compared to average values for the patient's age and gender.
  6. Interpret the results: The results of the Lachman Test can indicate the presence of an ACL injury, with abnormal anterior translation suggesting a tear or damage to the ligament.

Scoring

The Lachman Test is typically scored on a scale from 0 to 3, with 0 indicating a typical result and 3 indicating a complete anterior cruciate ligament rupture (ACL). The scoring system is used to quantify the amount of anterior translation or forward movement of the tibia bone during the test. It can help guide treatment decisions for ACL injuries.

A score of 0 indicates no anterior translation of the tibia bone and that the ACL is intact. A score of 1 indicates slight anterior translation, but the endpoint is firm, suggesting that the ACL is partially intact. A score of 2 indicates a more significant amount of anterior translation with a softer endpoint, suggesting that the ACL is significantly damaged but still intact. A score of 3 indicates a complete lack of endpoint, meaning that the ACL is completely ruptured.

The Lachman Scoring system is a helpful tool for quantifying the severity of ACL injuries and can help guide treatment decisions such as surgical intervention or conservative management. However, it is essential to note that the accuracy of the test and scoring system can be affected by various factors and should be used in conjunction with other clinical tests and imaging studies to guide treatment decisions.

Lachmans Test example (sample)

The Lachman Test is a physical examination to assess the integrity and stability of the knee joint's anterior cruciate ligament (ACL). The test is typically performed with the patient lying flat on their back and their knee flexed to a 20-30 degree angle.

Download this Lachman Test Example (Sample) here:

Lachmans Test example (sample)

When to use these ACL Tests?

ACL tests, including the Lachman Test, are typically used when there is suspicion of an ACL injury. The tests help evaluate knee joint stability and determine the severity and extent of ACL injuries. Here are some situations where ACL tests may be appropriate:

Following a knee injury:

ACL injuries often occur during high-impact sports or activities involving sudden direction changes or jumping. If a person experiences a knee injury during one of these activities, ACL tests may be used to determine if there is damage to the ligament.

Pre-operative assessment: 

Before undergoing ACL surgery, patients may experience a series of tests to evaluate the extent and severity of the injury. ACL tests can help guide surgical decision-making and provide valuable information for the surgical team.

Follow-up evaluation: 

After undergoing treatment for an ACL injury, patients may undergo follow-up evaluations to assess their progress and determine if additional treatment is necessary. ACL tests can evaluate knee joint stability and determine whether the ligament has healed adequately.

Athletic clearance: 

Athletes who have suffered an ACL injury may need to undergo testing to determine if they are ready to return to their sport. ACL tests can evaluate knee joint stability and determine if the athlete is ready to resume activity.

It is important to note that ACL tests should be performed by a healthcare professional who is trained in their use and interpretation. In addition, ACL tests should be used in conjunction with other clinical tests and imaging studies to guide treatment decisions. While ACL tests can provide valuable information about the extent and severity of ACL injuries, they are not a substitute for a comprehensive evaluation by a healthcare professional.

Benefits of these free Lachman Test Templates

Using free Lachman Test templates can provide the following benefits:

Standardized methods, consistent protocol

Lachman Test templates provide a standardized test method, ensuring that healthcare professionals follow a consistent protocol.

Improved accuracy, correct performance

Using Lachman Test templates can help improve the accuracy of ACL injury diagnosis by ensuring that healthcare professionals are performing the test correctly.

Time-saving, increased efficiency

Templates provide a quick and easy way to document the results of the Lachman Test, saving time and increasing efficiency.

Customizable, documentation purposes

Free Lachman Test templates can be customized with the practitioner's name, patient information, and evaluation date for documentation purposes.

Easily accessible, no additional cost

Free Lachman Test templates are easily accessible online and can be printed and used in clinical settings without additional costs.

Consistency in documentation, collaboration on treatment plans

Using a standardized template for the Lachman Test can help ensure consistency in documentation, making it easier for healthcare professionals to share information and collaborate on treatment plans.

Why use this Lachman Test app?

The Lachman Test app by Carepatron is a valuable tool for healthcare professionals evaluating and managing knee injuries, particularly those involving the anterior cruciate ligament (ACL). Here are some reasons why Carepatron is the best place to use this app:

The Carepatron app has a user-friendly interface that is easy to navigate, making it simple to perform the Lachman Test and document the results. The app includes customizable Lachman Test templates tailored to the practitioner's needs and preferences, including adding patient information, practitioner names, and dates.

The Carepatron app has been developed with input from leading healthcare professionals and is based on the latest research and best practices in ACL injury evaluation and management. The app is available on iOS and Android, making it accessible to healthcare professionals regardless of their preferred device or operating system.

The Lachman Test app is part of a suite of tools offered by Carepatron, including rehabilitation programs and outcome measures. Integration between these tools can help streamline patient care and facilitate practitioner communication.

The Carepatron app is designed to secure and comply with relevant healthcare regulations. It ensures that patient data is protected and practitioners can safely use the app in their clinical practice.

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How accurate is a Lachman Test?
How accurate is a Lachman Test?

Commonly asked questions

How accurate is a Lachman Test?

A Lachman Test's accuracy depends on the examiner's skill and experience. Still, research suggests it can be reliable for diagnosing ACL injuries when performed correctly.

What are the potential risks of a Lachman Test?

No significant risks are associated with a Lachman Test, although patients with knee injuries or instability may experience some discomfort during the test.

How long does a Lachman Test take?

A Lachman Test typically takes less than 5 minutes to perform. Still, the overall evaluation process may take longer depending on the injury's complexity and the examination's extent.

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