Hip dislocation

Anatomy and stability of the hip joint

The hip joint is a ball-and-socket joint: the femoral head of the thigh bone (femur) sits in the hip socket (acetabulum) of the pelvis. The labrum (joint lip), joint capsule, strong ligaments and surrounding muscles (gluteal muscles, short external rotators) ensure stability. This robust construction explains why dislocation usually only occurs when significant force is applied.

• Posterior (backwards): most common direction of dislocation, often in the event of impact trauma (e.g. knee against dashboard).
• Anterior (forward): less common, e.g. B. in the event of a fall with strong abduction/rotation.
• Concomitant injuries: labrum and cartilage damage, fractures of the femoral head/acetabulum, nerve (especially sciatic nerve) and vascular involvement.

What is a hip dislocation?

During hip dislocation, the femoral head completely leaves the socket. A distinction is made between traumatic dislocations (with an unchanged, “native” hip) and dislocations of a hip prosthesis. The latter follow their own rules; This is primarily about the dislocation of the native hip after trauma. An incomplete dislocation is known as a subluxation - this can also cause pain, instability and structural damage.

Causes and risk factors

• High-speed injuries: traffic accidents, falls from heights.
• Sports trauma: contact and speed sports (football, rugby, skiing).
• Pre-existing conditions: hip dysplasia, capsular ligament laxity; Even moderate trauma rarely leads to dislocation.
• Concomitant factors: fatigue, lack of warm-up, inadequate core and hip muscles.

Symptoms and warning signs

• Sudden, severe hip or groin pain following trauma.
• Inability to move, weight bearing not possible.
• Malposition: In posterior dislocation, leg position is typically bent, internally rotated and shortened; with anterior dislocation, abduction and external rotation are more likely.
• Abnormal sensations/paralysis: Indication of involvement of the sciatic or femoral nerve.
• Accompanying injuries: hematomas, swelling, possibly visible difference in leg length.

Attention: Persistent numbness, feeling cold or pale in the leg, severe misalignment or unbearable pain are emergency signs and must be checked by a doctor immediately.

First aid and emergency procedures

Rapid reduction (ideally within a few hours) is important in order to reduce the risk of subsequent bony and cartilage damage. After acute care in the hospital, the phase of orthopedic aftercare and rehabilitation begins.

Diagnostics: What we test

After stabilization and reduction, imaging and clinical clarification is carried out. It is important to assess the joint position, look for accompanying injuries and perform a neurovascular examination.

• X-ray of the hip/pelvis: direction of dislocation, success of the reduction, exclusion of major fractures.
• Computed tomography (CT): Detailed assessment of femoral head and acetabular fractures, intra-articular fragments.
• Magnetic resonance imaging (MRI): labral and cartilage damage, capsular ligament lesions, edema; Follow-up if symptoms persist.
• Neurological/vascular surgical examination: function of the sciatic nerve, blood flow, sensitivity.
• Functional diagnostics: stability tests and gait during the course, as soon as pain-adapted is possible.

In our practice in Hamburg, we coordinate the necessary imaging, assess findings in a structured manner and create an individual rehabilitation plan - conservative where possible and with clear indications for surgical measures if necessary.

Treatment: conservative first - surgical if there is a clear indication

Acute treatment (closed reduction under analgesic sedation/anesthesia) usually takes place in the clinic. The focus is then on joint-preserving follow-up treatment. Surgical procedures are indicated for irreducible dislocation, instability, trapped fragments or relevant fractures.

• Acute phase (days 0–7): Pain and swelling control (cooling, elevation), relief with forearm crutches; Thrombosis prophylaxis depending on the degree of immobilization.
• Movement: Early functional mobilization in the pain-free area, but avoiding positions critical to dislocation (after posterior dislocation, no forced flexion/adduction/internal rotation in the first few weeks).
• Loading: Depending on the accompanying injury, initially partial weightbearing (e.g. 15-20 kg) for 2-6 weeks; gradual increase according to clinical course and imaging.
• Orthotics/positioning: Abduction cushions or limiting orthotics can provide temporary stability; Use individually according to findings.
• Physiotherapy: Joint-preserving mobilization, muscle activation (gluteal muscles, hip stabilizers), coordination and gait training; dosed and progressive.
• Drug pain therapy: e.g. B. Paracetamol, if necessary NSAIDs - taking stomach, kidney and concomitant diseases into account; No long-term use without medical advice.

Surgical procedures are used when conservative measures alone do not ensure joint stability or when there is relevant structural damage.

• Arthroscopic/open removal of intra-articular fragments and repair of labral/cartilage damage when these lead to blockages, entrapment or instability.
• Osteosynthesis for fractures of the femoral head (e.g. Pipkin lesions) or acetabulum, depending on the fracture type and joint stability.
• Capsular ligament reconstructions in cases of persistent instability despite conservative therapy.
• Surgical decompression in the case of relevant nerve compression after interdisciplinary consideration.

Regenerative procedures (e.g. biological cartilage therapies) can be discussed in selected cases with circumscribed cartilage defects. They are not standard for hip dislocations and are only offered after strict indication testing.

Course, risks and prognosis

Many sufferers achieve good everyday resilience after structured rehabilitation. However, the course depends largely on the direction of dislocation, the time until reduction and the accompanying injuries. A serious prognosis therefore takes individual factors and imaging results into account.

• Femoral head necrosis (avascular necrosis): risk increases, among other things. with delayed reduction and severe accompanying injuries; Follow-up checks are important.
• Post-traumatic osteoarthritis: Possible long-term consequences of cartilage/labrum or fracture damage.
• Neurological deficits: Temporary or persistent failures of the sciatic nerve are possible; Early diagnosis and follow-up tests are essential.
• Heterotopic ossifications: In individual cases, excessive new bone formation in the soft tissue.
• Recurrent dislocation: Rare in the native hip, possible with remaining instability or with certain associated injuries.

Check-up appointments (e.g. after 2, 6 and 12 weeks and if necessary afterwards) help to safely increase stress levels, identify complications early and adjust therapy goals. If pain or functional deficits persist, we examine additional diagnostics (e.g. MRI) and, if necessary, minimally invasive options.

Rehabilitation: safely back to everyday life and sport

Rehabilitation is not a rigid scheme, but is based on the structural findings and your symptoms. The goal is a gradual, safe restoration of mobility, stability and strength without overloading the joint.

• Phase 1 (Week 0-2): Pain reduction, inflammation management, protected mobilization in the pain-free area, isometric activations (gluteal, core muscles).
• Phase 2 (weeks 2–6): partial weight-bearing, increasing range of motion, neuromuscular control, accompanied gait school; Continue to avoid positions critical to dislocation.
• Phase 3 (weeks 6-12): Building up the load to full load, increasing strength and stability, functionally training everyday specifics (stairs, squatting).
• Phase 4 (from month 3): Sport-specific structure, jumping/cutting movements only after proof of stability and medical clearance; Return to contact sports individually, often only after several months.

Depending on the course, we also rely on ergonomic advice, targeted core training and gradual transfer into independent training plans. An open exchange about the sensation of pain and strain is crucial for the fine dosage.

Prevention: reducing risks

• Safety measures in traffic (adjust belt, headrest correctly).
• Sport-specific technical training and protective equipment where appropriate.
• Strengthening of hip and core muscles for dynamic stabilization.
• Sufficient warm-up and progressive increase in load after breaks from injury.

Your support in Hamburg

Acute hip dislocations belong in the emergency room. We will then accompany you in our practice at Dorotheenstrasse 48, 22301 Hamburg, with modern diagnostics, conservative therapy concepts and clear information about further options. Our goal is a safe return to everyday life, work and – where appropriate – sport.

• Structured aftercare after reduction and/or surgery.
• Coordination of imaging (X-ray, CT/MRI) and interdisciplinary case discussion, if necessary.
• Individual rehabilitation plans, viable pain therapy, thrombosis and complication prevention.
• Transparent indication for surgical interventions – only if conservative treatment is not sufficient.