The Hip - book

Patellar Tendon Avulsion

  – See:       – Extensor Mechanism Injuries of the Knee       – Quadriceps       – Patellar Tendon Avulsion from TKR – Discussion:     – usually occur in pts under age of 40;     – most ruptures occur w/ the knee in a flexed position (around 60 deg) which are then … Read more

Patella in TKR

– See: TKR Menu – Discussion: – anatomy / q angle – blood supply to the knee – indications for patellar resurfacing – design and function of the patellar component in TKR:            – effects of component rotation – Patellar Resurfacing: (technique) – indications for patellar resurfacing – lateral retinacular release: – Non Resurfaced Patella Considerations: … Read more

Patella Infera

– See: Patella Alta – Discussion:     – patella infera indicates an abnormally low patella;     – it most often results from to soft tissue contracture and hypotonia of quadriceps muscle following surgery or trauma to knee, – Lateral Radiograph of the Knee:     – is used to determine patellar height; – … Read more

Patella Infera following TKR

– See:        – Malposition of Joint Line:        – Patellar Clunk Syndrome: – Discussion:     – more frequent than patella alta;     – data suggest that maintenance of a ht between 10 and 30 mm is optimal     – this problem may be prevented by keeping resection … Read more

Partial Patellectomy

– Discussion:     – not all patellar fractures are amenable to ORIF;     – in most cases of patellar frx, one large frag of patella can be preserved;            – most often the distal pole is comminuted, whereas superior pole is intact,however, as a principle, the larger                    fragment … Read more

Patella Alta

– See:       – Lateral radiograph of the Knee       – Patella Infera       – Subluxation of the Patella – Discussion:     – patella alta refers to an abnormally high patella in relation to femur;     – may result in Subluxation and dislocation of patella; – Associated Conditions:   … Read more

Patella Frx following TKR

  – Discussion:     – patient may note new onset of anterior knee pain;     – diagnosis may be difficult if frx is non-displaced;           – if patient is more than 6-12 months post-op, then consider bone scan; – Etilogy:     – devascularization of the patella (as might … Read more

Parsonage-Turner Syndrome / Neurologic Amyotrophy

– See:       – Images in clinical medicine. Neuralgic amyotrophy.  – Discussion:      – brachial plexus / brachial neuritis       – acute brachial neuropathy (acute brachial radiculitis, Parsonage-Turner syndrome) is of unknown etiology and appears sporadically but may             follow immunization, or viral illness;     – predominant clinical finding is pain, usually limited to the shoulder;      … Read more