The main clinical symptom is pain at the inferior pole of the patella. Diagnosis is based on the clinical features of the disease. Diagnostic imaging should be considered to rule out other causes of knee pain or to establish the diagnosis of patella tip syndrome when in doubt.
Similar to other tendinopathies, the etiology of patella tip syndrome is not completely understood, but repetitive overload is thought to be an important factor. Histologic examination of biopsy specimens from patients undergoing patellar tendon surgery for chronic symptoms has shown that chronic PT is associated with degenerative changes in the tendon. Accordingly, the disease is better characterized as “tendinopathy” than “tendinitis”, resembling the situation in other overuse tendon problems such as Achilles tendinopathy.
Approximately 40% of all tennis players report problems with their elbow, but only a quarter of them consider the symptoms to be disabling and severe. Notably, most patients with tennis elbow do not play tennis. This is due to the fact that many tennis players have a weekly training routine that regularly loads the tendons and keeps them healthy. Rather, the injury usually occurs in people who have been sedentary for years and then overuse a previously underused and atrophied tendon by exercising at the gym, doing gardening, or even just carry heavy luggage. When the injury is caused by playing tennis it is the backhand stroke that leads to excessive loading of the tendons at the common extensor origin.
The population prevalence is approximately 2%, with peak incidence occurring at 40 to 50 years of age.
The initial treatment should be conservative including rest, physiotherapy, and nonsteroidal anti-inflammatory drugs. As in the case of chronic Achilles tendinopathy and chronic plantar fasciopathy, eccentric (lengthening only) exercises have become the mainstay of rehabilitation programs for tennis elbow. In most circumstances, cortisone injections should not be used. This is due to the fact that cortisone leads to very good results in the short term (six weeks) but has been demonstrated to be harmful in the longer term (more than three months). Surgery should be considered when conservative treatment fails.
An attractive alternative to surgery is Radial Shock Wave Therapy for tennis elbow treatment.
Side effects of Radial Shock Wave Therapy (RSWT) using the Swiss DolorClast®.
When performed properly, RSWT with the Swiss DolorClast® has only minimal risks. Typical device-related non-serious adverse events are:
- Pain and discomfort during and after treatment (anaesthesia is not necessary)
- Reddening of the skin
- Swelling and numbness of the skin over the treatment area
These device-related non-serious adverse events usually disappear within 36h after the treatment.
Locate the area of pain through palpation and biofeedback.
Mark the area of pain.
Apply coupling gel to transmit shock waves to the tissue.
Apply shock waves
Deliver Radial or Focused Shock Waves to the area of pain while keeping the applicator firmly in place on the skin.
Radial shock Wave therapy for lateral epicondylitis. A prospective randomised controlled single-blind study.
Spacca G, Necozione S, Cacchio A.
Eura Medicorphys 2005; 41:17-25
This study aims at finding out if shock wave therapy does indeed help in relieving pain and recovering mobility in patients suffering from tennis elbow.
Shock Wave therapy for tennis and golfers’s elbow – 1 year follow up.
Krischnek O, Hopf C, Nate b, et al.
Arch Orthop Trauma Surg 1999; 62-66
This study shows the results of a shock wave treatment on patients suffering from chronic medial epicondylitis one year after the original treatment.
|Recommended Settings||Treatment||Myofascial Therapy|
|Number of treatment sessions||3 to 5||3 to 5|
|Interval between two sessions||1 week||1 week|
|Air pressure Evo Blue®||1.5 to 3 bar||3 to 4 bar|
|Air pressure Power+||Not recommended||Not recommended|
|Impulses||2000 on the painful spot||
|Frequency||8Hz to 12Hz||12Hz to 20Hz|
|Skin pressure||Light||Light to moderate|
The following contraindications of RSWT using the Swiss DolorClast® must be considered:
- Treatment over air-filled tissue (lung, gut)
- Treatment of pre-ruptured tendons
- Treatment of pregnant women
- Treatment of patients under the age of 18 years (except for Osgood-Schlatter disease and muscular dysfunction in children with spastic movement disorders)
- Treatment of patients with blood-clotting disorders (including local thrombosis)
- Treatment of patients treated with oral anticoagulants
- Treatment of tissue with local tumors or local bacterial and/or viral infections
- Treatment of patients treated with cortisone
Some indications may not be approved in the United States of America, under regulation by the US FDA. Please refer to the respective Instructions for Use.