Pre-hospital period: emergency care rules
At the ambulance or trauma center stage, establishing an absolutely precise diagnosis is not only impossible but also clinically inappropriate. The primary task of the physician is to deliver the casualty safely to specialized medical professionals.
Key requirements for first aid provision:
- Immobilization. Must be complete and adequate. A transport splint is applied extending all the way from the level of the gluteal fold to the tips of the toes of the injured foot.
- Limb position. The optimal position is considered to be with slight flexion in the knee joint at exactly 5°.
- Relief of joint locking. If the joint is locked, any attempts to forcibly extend or straighten the leg are strictly prohibited. This will only lead to additional tissue trauma.
- Analgesia. Only systemic general analgesics are permitted. Local anesthesia directly in the fracture area or performing a joint puncture outside a sterile operating room are strictly contraindicated due to the colossal risk of developing severe infectious complications.
The patient must be immediately routed to a specialized trauma hospital to clarify the diagnosis and determine further management.
Hospital stage: from acute trauma to the cold period
In a clinical setting, the diagnostic algorithm is significantly expanded. Once acute symptoms subside and the so-called "cold" period begins, the physician conducts an in-depth clinical examination.
It mandatorily includes:
- Detailed collection of complaints and determination of the mechanism of injury (anamnesis).
- Visual assessment of the patient's gait and posture.
- Determination of the available range of motion in the joint and preservation of muscle strength.
- Performance of specific functional tests to assess the condition of all stabilizing structures of the knee.
Diagnostic imaging at this stage implies mandatory radiography in two standard projections. If baseline data are insufficient, ultrasound, computed tomography (CT), or MRI are additionally utilized.
Practice shows that chronic, untimely diagnosed pathologies are very frequently discovered during consultations. Such frequent "findings" include: meniscal injuries, ruptures of the cruciate and collateral ligaments, presence of intra-articular loose bodies, and development of deforming osteoarthritis.
Loose joint bodies: diagnostics and management
The presence of detached fragments (loose bodies or "joint mice") in the joint cavity inevitably leads to a formidable complication — the development of chronic recurrent synovitis.
The diagnosis of this pathology has its pitfalls. Standard radiography is far from always informative, since some joint bodies are formed from completely radiolucent cartilaginous tissue. That is why MRI is recognized as the optimal and most reliable method for detecting such hidden fragments.
Treatment is exclusively surgical.
The absolute method of choice today is arthroscopic removal, which has significant advantages over classical open arthrotomy:
- Allows for a comprehensive visual revision of the entire joint.
- Guarantees the detection and removal of all loose bodies (there are often several of them).
- Helps to accurately determine the cause of the "joint mouse" formation.
- Makes it possible to immediately expand the scope of the surgery: the surgeon can simultaneously treat the chondromalacia zone, trim the damaged meniscus edges, or perform curettage of the bone cavity in osteochondritis dissecans.
Anatomical and biomechanical features of the lower leg
In the structure of all long bone injuries, fractures of the leg bones firmly rank third in frequency. Anatomically, the tibia and fibula lie parallel to each other. They are functionally inseparable and tightly connected by a dense interosseous membrane, which largely determines the biomechanics of the trauma and the specifics of subsequent treatment.
Briefly: answers to topical questions
How are proximal tibial fractures classified according to localization and the nature of the injury (condyles, intercondylar eminence, metaphysis)?
Proximal tibial fractures (tibia) are classified by localization into intra-articular and extra-articular, with specific categorization of injuries to the condyles, intercondylar eminence, and tibial tuberosity.
- Condylar fractures — are intra-articular. Based on morphology (using the lateral condyle as an example), pure impression (depression), splitting, or a combination of impression and splitting are distinguished.
- Intercondylar eminence fracture — accompanied by articular cartilage injury. May act as a component of a severe comminuted bicondylar fracture.
- Tibial tuberosity fracture — classified as an extra-articular avulsion fracture (apophysiolysis in children).
According to the orientation of the fracture line, leg bone fractures are divided into transverse, oblique, spiral, and comminuted.
Safe care rule: Immobilization (from the buttocks to the toes), Position (5° of flexion), Analgesia (general only).
Class and exam questions
Is it permissible to perform knee joint aspiration at the pre-hospital stage?
No, this is strictly contraindicated. Joint aspiration in non-sterile conditions carries an extremely high risk of introducing infection and developing severe complications.
Why do standard X-rays sometimes fail to show loose bodies in the joint?
Some loose joint bodies consist exclusively of cartilaginous tissue, which is radiolucent and not visualized on standard radiographs.
What to do if the joint is locked ("joint locking")?
The limb must be fixed in the position it is currently in. It is strictly forbidden to forcefully attempt to straighten or extend the leg.
What is the main advantage of arthroscopy over arthrotomy in the removal of loose bodies?
Arthroscopy allows for a complete exploration, guarantees the detection of all bodies, identifies the cause of their appearance, and, if necessary, immediately treats the chondromalacia zone or damaged meniscus.
What else to study on this topic
- Functional tests to assess the stabilizing structures of the knee joint
- Osteochondritis dissecans (König's disease) and management tactics for the bone cavity
- Anatomy and biomechanics of the interosseous membrane of the leg
- Pathogenesis of chronic recurrent synovitis
- Surgical treatment of the chondromalacia zone and trimming of meniscus edges
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