Krosshaug, Am J Sports Med 2007 - Mechanisms of Anterior Cruciate Ligament Injury in Basketball: Video Analysis of 39 Cases - Article Summary

Mechanisms of Anterior Cruciate Ligament Injury in Basketball: Video Analysis of 39 Cases

Krosshaug, Bahr, et al.·Am J Sports Med·2007·1,183 citations·Case series

DOI·PubMed

Background

The mechanisms of anterior cruciate ligament injury in basketball are not well defined.

Purpose

To describe the mechanisms of anterior cruciate ligament injury in basketball based on videos of injury situations.

Methods

Study Design: Case series; Level of evidence, 4.

Six international experts performed visual inspection analyses of 39 videos (17 male and 22 female players) of anterior cruciate ligament injury situations from high school, college, and professional basketball games.
Two predefined time points were analyzed: initial ground contact and 50 milliseconds later.
The analysts were asked to assess the playing situation, player behavior, and joint kinematics.

Results

There was contact at the assumed time of injury in 11 of the 39 cases (5 male and 6 female players).
4 of these cases were direct blows to the knee, all in men.
11 of the 22 female cases were collisions, or the player was pushed by an opponent before the time of injury.
The estimated time of injury, based on the group median, ranged from 17 to 50 milliseconds after initial ground contact.
The mean knee flexion angle was higher in female than in male players, both at initial contact (15 degrees vs 9 degrees , P = .034) and at 50 milliseconds later (27 degrees vs 19 degrees , P = .042).
Valgus knee collapse occurred more frequently in female players than in male players (relative risk, 5.3; P = .002).

Conclusions

Female players landed with significantly more knee and hip flexion and had a 5.3 times higher relative risk of sustaining a valgus collapse than did male players. Movement patterns were frequently perturbed by opponents.

Clinical Relevance: Preventive programs to enhance knee control should focus on avoiding valgus motion and include distractions resembling those seen in match situations.

Core

Mechanisms of Anterior Cruciate Ligament Injury in Basketball: Video Analysis of 39 Cases.

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Mechanisms of Anterior Cruciate Ligament Injury in Basketball: Video Analysis of 39 Cases

Krosshaug, Bahr, et al.·Am J Sports Med·2007·1,183 citations·Case series

DOI·PubMed

Background

The mechanisms of anterior cruciate ligament injury in basketball are not well defined.

Purpose

To describe the mechanisms of anterior cruciate ligament injury in basketball based on videos of injury situations.

Methods

Study Design: Case series; Level of evidence, 4.

Six international experts performed visual inspection analyses of 39 videos (17 male and 22 female players) of anterior cruciate ligament injury situations from high school, college, and professional basketball games.
Two predefined time points were analyzed: initial ground contact and 50 milliseconds later.
The analysts were asked to assess the playing situation, player behavior, and joint kinematics.

Results

There was contact at the assumed time of injury in 11 of the 39 cases (5 male and 6 female players).
4 of these cases were direct blows to the knee, all in men.
11 of the 22 female cases were collisions, or the player was pushed by an opponent before the time of injury.
The estimated time of injury, based on the group median, ranged from 17 to 50 milliseconds after initial ground contact.
The mean knee flexion angle was higher in female than in male players, both at initial contact (15 degrees vs 9 degrees , P = .034) and at 50 milliseconds later (27 degrees vs 19 degrees , P = .042).
Valgus knee collapse occurred more frequently in female players than in male players (relative risk, 5.3; P = .002).

Conclusions

Clinical Relevance: Preventive programs to enhance knee control should focus on avoiding valgus motion and include distractions resembling those seen in match situations.

Background

The mechanisms of anterior cruciate ligament injury in basketball are not well defined.

Purpose

To describe the mechanisms of anterior cruciate ligament injury in basketball based on videos of injury situations.

Methods

Study Design: Case series; Level of evidence, 4.

Six international experts performed visual inspection analyses of 39 videos (17 male and 22 female players) of anterior cruciate ligament injury situations from high school, college, and professional basketball games.
Two predefined time points were analyzed: initial ground contact and 50 milliseconds later.
The analysts were asked to assess the playing situation, player behavior, and joint kinematics.

Results

There was contact at the assumed time of injury in 11 of the 39 cases (5 male and 6 female players).
4 of these cases were direct blows to the knee, all in men.
11 of the 22 female cases were collisions, or the player was pushed by an opponent before the time of injury.
The estimated time of injury, based on the group median, ranged from 17 to 50 milliseconds after initial ground contact.
The mean knee flexion angle was higher in female than in male players, both at initial contact (15 degrees vs 9 degrees , P = .034) and at 50 milliseconds later (27 degrees vs 19 degrees , P = .042).
Valgus knee collapse occurred more frequently in female players than in male players (relative risk, 5.3; P = .002).

Conclusions

Clinical Relevance: Preventive programs to enhance knee control should focus on avoiding valgus motion and include distractions resembling those seen in match situations.

Background

The mechanisms of anterior cruciate ligament injury in basketball are not well defined.

Purpose

To describe the mechanisms of anterior cruciate ligament injury in basketball based on videos of injury situations.

Methods

Study Design: Case series; Level of evidence, 4.

Six international experts performed visual inspection analyses of 39 videos (17 male and 22 female players) of anterior cruciate ligament injury situations from high school, college, and professional basketball games.
Two predefined time points were analyzed: initial ground contact and 50 milliseconds later.
The analysts were asked to assess the playing situation, player behavior, and joint kinematics.

Results

There was contact at the assumed time of injury in 11 of the 39 cases (5 male and 6 female players).
4 of these cases were direct blows to the knee, all in men.
11 of the 22 female cases were collisions, or the player was pushed by an opponent before the time of injury.
The estimated time of injury, based on the group median, ranged from 17 to 50 milliseconds after initial ground contact.
The mean knee flexion angle was higher in female than in male players, both at initial contact (15 degrees vs 9 degrees , P = .034) and at 50 milliseconds later (27 degrees vs 19 degrees , P = .042).
Valgus knee collapse occurred more frequently in female players than in male players (relative risk, 5.3; P = .002).

Conclusions

Clinical Relevance: Preventive programs to enhance knee control should focus on avoiding valgus motion and include distractions resembling those seen in match situations.