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Knee injury – Anterior Cruciate Ligament (ACL) tear

What is Anterior Cruciate Ligament tear?

The anterior cruciate ligament, or ACL, is one of four major knee ligaments. The ACL is critical to knee stability, and people who injure their ACL often complain of symptoms of their knee giving-out from under them. Therefore, many patients who sustain an ACL tear opt to have surgical […]

Periarticular Ligamentous Tissue: A Biochemical and Physiologic Assessment-Structure

Structure

The histology of periarticular tendons and ligaments is a much-neglected area of investigation. Although many histology texts combine these two tissues as “dense, regular connective tissue”, certain ligaments and tendons are sufficiently characteristic to be distinguishable from each other based upon their histological appearance .

The variables considered are collagen bundle width, cell morphology […]

SPECIFIC TESTS-Medial shearing

Significance

This test is used to detect internal derangement at the inner side of the knee. Pain on jerk is suggestive for a minor lesion at the tibial insertion of the anterior cruciate ligament.

Positioning.

The subject lies in the supine position with the knee flexed to a right angle, and the heel resting […]

Anterior drawer test in external rotation

Positioning.

The subject is positioned as for the previous test. The lower leg and foot are externally rotated as far as is comfortably possible.The examiner places both hands around the upper part of the tibia with the index fingers on the hamstring tendons and the thumbs at the anterior border of the joint .

Procedure. […]

Passive lateral rotation in prone position

The subject lies in the prone position with both knees flexed to a right angle. The examiner encircles both heels and performs a bilateral external rotation. The range of movement is assessed by the twisted position of the feet. This test may be decisive in comparing the range of external rotation.

Common pathological situations:

• […]

Etiology of Skiing Injuries

Skiing

Since the 1960s participation in downhill skiing has increased at least 40-fold in the USA. The number of skiers is estimated to be around 8 million on an annual basis. The number of ski injuries annually is probably more than 1 million per year worldwide.

Skier-related factors

Relative to the population at risk, men […]

Anterior Cruciate Ligament Tear (ACL)

SYMPTOMS

The symptoms are pain and immediate haemarthrosis, caused by bleeding from the ruptured ligament. This is an injury common in contact sports such as football, rugby and other high intensity sports such as downhill skiing. There is often a ‘pop’ sound from the knee and an inability to continue.

AETIOLOGY

The typical athlete suffers […]

Self Diagnosis of Sports Injuries

The principles of injury management rely on the premise that we know what we are treating. Diagnosis is the key to success. We must differentiate injuries such as ‘knee sprain’, ‘muscle strain’ and ‘bruises’ from the corresponding pathoanatomical diagnoses: ‘rupture of the anterior cruciate ligament’, ‘grade II muscle rupture’ or ‘intra-muscular haematoma’. In some cases, […]

A Patient’s Guide to Knee Anatomy

Introduction

To better understand how knee problems occur, it is important to understand some of the anatomy of the knee joint and how the parts of the knee work together to maintain normal function.

First, we will define some common anatomic terms as they relate to the knee. This will make it clearer as we […]

A Patient’s Guide to Hamstring Tendon Graft Reconstruction of the ACL

Introduction

When the anterior cruciate ligament (ACL) in the knee is torn or injured, surgery may be needed to replace it. There are many different ways to do this operation. One is to take a piece of the hamstring tendon from behind the knee and use it in place of the torn ligament. When arranged […]