Extracorporeal shock wave treatment of non- or delayed union of proximal metatarsal fractures.

BACKGROUND: Nonunion or delayed union of fractures in the proximal aspect of metatarsals 1 to 4 and Zone 2 of the fifth metatarsal were treated by high energy extracorporeal shock wave treatment (ESWT) to study the safety and efficacy of this method of treatment in a FDA study of the Ossatron device. MATERIALS AND METHODS: In a prospective single-arm, multi-center study, 34 fractures were treated in 32 patients (two subjects had two independent fractures) with ESWT. All fractures were at least 10 (range, 10 to 833) weeks after injury, with a median of 23 weeks. ESWT application was conducted using a protocol totaling 2,000 shocks for a total energy application of approximately 0.22 to 0.51 mJ/mm2 per treatment. The mean ESWT application time for each of the treatments was 24.6 +/- 16.6 minutes, and anesthesia time averaged 27.1 +/- 10.4 minutes. All subjects were followed for 1 year after treatment at intervals of 12 weeks, 6, 9, and 12 months. RESULTS: The overall success rate at the 12-week visit was 71% with low complications, significant pain improvement as well as improvement on the SF-36. The success/fail criteria was evaluated again at the 6- and 12-month followup, showing treatment success rates of 89% (23/26) and 90% (18/20), respectively. The most common adverse event was swelling in the foot, reported by five subjects (15.6%). CONCLUSION: High-energy ESWT appears to be effective and safe in patients for treatment of nonunion or a delayed healing of a proximal metatarsal, and in fifth metatarsal fractures in Zone 2.

Endoscopic plantar fascia release.

BACKGROUND: Endoscopic release of the plantar fascia is becoming an increasingly popular alternative to open procedures for the treatment of chronic plantar fasciitis. Although most patients can be successfully treated with Achilles tendon stretching, orthoses, physical therapy and corticosteroid injections, a small percentage of patients will have symptoms that are refractory to such treatments. METHODS: This is a retrospective review, analyzing the clinical outcome of 22 consecutive patients treated for chronic plantar fasciitis with endoscopic plantar fascia release by a single orthopaedic foot and ankle surgeon. RESULTS: These patients complained of symptoms for an average of 7.43 months before referral to the senior author (MS); 11 patients had chronic symptoms for 12 months or more. The ages at surgery ranged from 30 to 73 years. Followup averaged 8.48 (range 6 to 20) months. Satisfaction rate with this procedure was 97.7% and all patients reported at least a 50% improvement in pain after surgery. Twenty-two patients completed a modified Mayo Foot and Ankle Score: 15 of 22 (68%) were judged to have good or excellent results. Bilateral symptoms and prior ankle trauma or surgery were significantly correlated with less favorable results. CONCLUSIONS: Patients who had no previous foot trauma and had unilateral symptoms obtained the best results from this procedure. Even patients who had some residual pain in their foot were satisfied with the procedure and with the level of pain relief that had been achieved. Endoscopic plantar fascia release does appear to benefit selected patients who fail to respond to conservative therapy.