Journal of Orthopaedics and Traumatology

Official Journal of the Italian Society of Orthopaedics and Traumatology

Journal of Orthopaedics and Traumatology Cover Image
Open Access

Effectiveness of extracorporeal shockwave therapy in three major tendon diseases

  • Christian Carulli1Email author,
  • Filippo Tonelli1,
  • Matteo Innocenti1,
  • Bonaventura Gambardella1,
  • Francesco Muncibì1 and
  • Massimo Innocenti1
Journal of Orthopaedics and TraumatologyOfficial Journal of the Italian Society of Orthopaedics and Traumatology 201517:361

https://doi.org/10.1007/s10195-015-0361-z

Received: 15 January 2015

Accepted: 11 June 2015

Published: 2 July 2015

Abstract

Background

Extracorporeal shockwave therapy is a conservative treatment for several painful musculoskeletal disorders. The aim of the study was the assessment of the relief from pain by the shockwave therapy in a population of consecutive patients affected by specific pathologies.

Materials and methods

A group of consecutive patients were studied and treated. They were affected by calcific tendonitis of the shoulder (129 patients), chronic Achilles tendinopathy (102 patients), and lateral epicondylitis of the elbow (80 subjects). Each patient had 3 applications with a monthly interval, and was followed up at 1, 6, and 12 months after treatment. Results were evaluated by the numeric rating scale (NRS) in all cases, the Constant Murley Score for the assessment of the shoulder function, the American Orthopaedic Foot and Ankle Society Score for subjects affected by chronic Achilles tendinopathy, and the Oxford Elbow Score for those affected by a lateral epicondylitis of the elbow.

Results

One year after treatment, the results were considered satisfactory with an almost complete resolution of symptoms. There were statistically significant results at the 12-month follow-ups regarding the mean NRS score (from 6.25 to 0.2), the Constant Murley Score (from 66.7 to 79.4), the Oxford Elbow Score (from 28 to 46), and the AOFAS (from 71 to 86).

Conclusions

Extracorporeal shockwave therapy may be considered a safe, economic, and effective treatment for several chronic musculoskeletal disorders, allowing satisfactory pain relief and improvement of function ability.

Level of evidence

Level IV.

Keywords

Extracorporeal shockwaveCalcific tendonitis of the shoulderAchilles tendinopathyEpicondylitis

Introduction

Extracorporeal shock wave therapy (ESWT) is one of the great advances in orthopaedics over the last 20 years [1]. Initially indicated for the treatment of kidney stones [2], it has been applied in cases of bone non-unions, and then in several musculoskeletal disorders, given the satisfactory clinical outcomes reported in different randomized clinical trials and cohort studies. The main indications have been the following: lateral epicondylitis of the elbow, calcific tendonitis of the rotator cuff, plantar fasciitis, Achilles and patellar tendinopathy, and pubalgia [1, 313]. A reduction of pain and a good recovery of articular function have been obtained in most cases [1317], even if in high-level athletes a more aggressive strategy is recommended to allow a quick return to sports activities [18].

The mechanism by which ESWT may produce a clinical effect is still uncertain. Several theories have been proposed: a mechanical effect by increasing the pressure in the calcium deposition causing fragmentation; a molecular effect with induction of an inflammatory response with neovascularization and then a chemotactic action and phagocytosis of calcific deposits; an analgesic effect by inhibiting the activation of the serotonergic system, and peripheral denervation. Probably, a combination of angiogenic and analgesic effects explains the overall outcomes on the target tissues [7, 8, 1923]. Direct and indirect biologic effects of ESWT vary proportionally to the amount of energy and to the type of frequency applied; moreover, the shockwave driving tool influences the induced modifications on the target tissue [24].

The aim of the present retrospective study is the evaluation of the clinical outcomes in a population of patients affected by common musculoskeletal disorders treated by ESWT.

Materials and methods

From January 2011 to March 2013, 311 consecutive patients were selected and treated by ESWT for specific painful musculoskeletal disorders at the authors’ institution. One-hundred and twenty-nine were affected by a calcific tendonitis of the shoulder, 102 by an Achilles tendinopathy, and 80 by a later epicondylitis of the elbow.

The mean age was 48.5 (range 19–80); 230 were male, and 81 female. Inclusion criteria were: adult patients with clinical and instrumental diagnosis of lateral epicondilytis of the elbow, chronic Achilles tendinopathy, and calcific tendonitis of the shoulder; persistent symptoms for at least 3 months; failure or partial resolution of symptoms after conservative (medical and physical) treatment; no recent history of trauma or chronic joint instability; no recent related surgery.

Exclusion criteria were: patients with a clinical but not instrumental diagnosis of any tendon disease; subjects who had not tried any conservative approach; subjects referring an inadequate duration of proper medical or physical treatments. The institutional review board allowed the retrospective analysis of patients’ data and outcomes. Demographic data of the selected patients are reported in Table 1.
Table 1

Demographics and characteristics of the patients

 

Shoulder calcific tendonitis (n = 129)

Achilles tendinopathy (n = 102)

Elbow lateral epicondylitis (n = 80)

Male/female

92/37

46/56

45/35

Mean age (range)

47.5 (19–70)

48 (22–80)

50 (20–76)

Mean duration of symptoms (weeks)

4.3 (3–7)

6.7 (2–9)

3.9 (2–6)

Dominant side affected

72

64

56

Previous treatments (number of subjects)

 NSAIDs

31

24

19

 Other analgesics

52

41

28

 Physical therapy

21

16

12

Pain assessment in all patients was conducted before treatment by an 11-point numeric scale (numeric rating scale, NRS). The clinical evaluation was conducted by the Constant Score for the assessment of shoulder function [25]; the American Orthopaedic Foot and Ankle Society Score (AOFAS) [26] for subjects affected by chronic Achilles tendinopathy; and the Oxford Elbow Score [27] for those suffering a lateral epicondylitis of the elbow. All patients gave their consent to the treatment and follow-up.

A single device generating shockwaves (ReflecTron®, HMT, Switzerland) was used in all cases. The energy level and number of shots were adapted to the specific pathology according to the protocols supplied by the manufacturer. Each patient had 3 ESWT applications at monthly intervals. Each session consisted of 2400 shockwave applications with an intensity depending on the site and the pathology observed (Table 2). No local anaesthesia was given before the treatment. All patients were treated by two experienced orthopaedic surgeons.
Table 2

Active level of ESWT

Disease

Pulses and energy of ESWT

Calcific tendonitis of the shoulder

2400 pulses at >0.20 mJ/mm2

Achilles tendinopathy

2400 pulses at 0.08–0.33 mJ/mm2

Lateral epicondylitis of the elbow

2400 pulses at <0.12 mJ/mm2

All subjects were followed up at 1, 6, and 12 months after the last application. The clinical evaluation consisted of NRS and function evaluation by the administration of the above mentioned specific scores (Table 3). Particular attention has been focused on the use of analgesic drugs, reported complications after the ESWT applications, and the need for any further instrumental study.
Table 3

Clinical and functional scores

 

Baseline

1 month

6 months

12 months

Numeric rating scale (NRS)

 Calcific tendonitis of the shouldera

6.5 ± 1.4 (4–9)

5.9 ± 1.3 (3–9)*

p = 00.013

1.2 ± 0.8 (0–3)*

p < 0.001

0.2 ± 0.4 (0–1)*

p < 0.001

 Achilles tendinopathya

6.9 ± 1.2 (5–9)

5.3 ± 1.1 (4–8)*

p < 0.001

1.7 ± 0.8 (0–3)*

p < 0.001

0.3 ± 0.5 (0–2)*

p < 0.001

 Lateral epicondylitis of the elbowa

6.6 ± 1.2 (4–9)

4.2 ± 1.0 (3–6)*

p < 0.001

0.9 ± 0.8 (0–3)*

p < 0.001

0.1 ± 0.3 (0–1)*

p < 0.001

Functional scores

 Constant Murley Score

66.7 ± 4.3 (56–76)

73.7 ± 3.9 (59–78)*

p = 00.012

78.3 ± 2.6 (64–80)*

p < 0.001

79.4 ± 1.4 (70–80)*

p < 0.001

 AOFAS

71 ± 5.6 (63–80)

72 ± 3.2 (67–75)*

p < 0.001

77 ± 2.4 (72–84)*

p < 0.001

86 ± 1.9 (82–90)*

p < 0.001

 Oxford Elbow Score

28 ± 2.7 (23–35)

35 ± 2.5 (31–38)*

p = 0.0016

42 ± 2.6 (36–47)*

p < 0.001

46 ± 2.6 (42–50)*

p < 0.001

* Paired Student t-test, compared to baseline (p < 0.05)

aThe use of pain regulating drugs was reported by 34 patients (12.0 %), with a peak of utilization in the first 3 days, once daily

The statistical analysis was performed by a sample size calculation based on a priori assumption of p = 0.05. All data were tested for the normal distribution using the Kolmogorov–Smirnov test. The Student t-test was used to perform the analysis for the scores, testing each disease separately. For each parameter, three coupled samples were calculated (before treatment–1 month, before treatment–6 months, before treatment–12 months) (Table 3).

Results

Two-hundred and eighty-three patients completed the follow-up period. Twenty-eight subjects were lost: none of them was lost due to conditions or complications related to the procedures.

No complications were recorded. In 42 cases, the patients reported the presence of cutaneous bruises after the applications. The overall mean NRS score was 6.25 (range 4–9) before the treatment. One month after the first application, the mean NRS score was 4.9 (range 3–9), 1.2 at 6 months (range 0–3), and finally 0.2 at 12 months (range 0–2). Considering single pathologies, patients showed an improvement in any score: mean NRS, mean Constant Murley Score for shoulders, mean Oxford Elbow Score for elbows, and mean AOFAS Score for feet (Table 3). Over the months of follow-up we recorded a progressive maintenance of results (Figs. 1, 2). The use of pain regulating drugs was reported by 34 patients (12.0 %), with peak utilisation on the first 3 days, once daily. In 12 cases (4.2 %), the pain did not show a significant decrease so an ultrasound or MRI examination was necessary to understand the causes of the persistency of symptoms.
Fig. 1

NRS scores after treatment

Fig. 2

Constant Murley, AOFAS, and Oxford Elbow Scores after treatment

Discussion

Shockwave therapy represents an innovative approach for the management of painful chronic musculoskeletal diseases, particularly in the case of failure of a previous conservative treatment. This treatment has to be considered safe, minimally invasive, versatile, and with low costs [28].

In the present study, as reported in the literature, after a latency of days to a few weeks after treatment, all patients reported a clinical benefit, with a significant decrease of pain, improvement in function, and a fair use of analgesics. Focusing attention on the specific pathologies, our outcomes are in line with the latest reports.

Lateral epicondylitis of the elbow was treated by ESWT in five recent RCTs, mostly of high quality [2933]. In two of these, no significant differences were found up to 48 weeks after the treatment between ESWT and placebo [31, 32]. Spacca et al. [31] found significant differences between ESWT and placebo on pain (0.5 versus 6.5) and grip strength (46 versus 36) 12 weeks after the treatment. Pettrone et al. [29] found similar significant differences in pain at the 12-week follow-up. Collins et al. [33] found significant difference in pain during activity in favour of the ESWT group. There is conflicting evidence for the effectiveness of ESWT versus placebo in the short term and evidence of no difference in effect on the mid-term and long-term follow-up.

Several studies have confirmed the benefits of ESWT for the treatment of calcific tendonitis of the shoulder [24, 34, 35]. Particularly, it has been reported that high-energy ESWT (EFD ≥ 0.28 mJ/mm2) are more effective than low-energy doses (EFD < 0.28 mJ/mm2) in the improvement of the shoulder function and pain resolution. Gerdesmayer et al. [35] enrolled 144 patients with a randomized level of energy (high or low). Both types of ESWT resulted in a significant improvement at the 6-month evaluation, but high-energy ESWT induced a higher outcome on the Constant Murley Score. Calcific deposits disappeared in the same percentage of patients in both groups. Cacchio et al. [34] used a different score (University of California–Los Angeles UCLA Shoulder Rating Scale) to evaluate shoulder function after ESWT treatment versus placebo of calcific tendonitis of the shoulder. Significant differences in favour of ESWT versus placebo were reported at the 6-month follow-up.

ESWT is effective as a conservative approach in the treatment of chronic Achilles tendinopathy. This has been recently confirmed by some important RCTs [12, 36, 37]. Rasmussent et al. [12] showed improvements in the treatment with ESWT versus placebo at a 12-week follow-up. The mean AOFAS Score increased from 74 to 81 in the placebo group and from 70 to 88 in the ESWT group (p = 0.05). Better results were seen in the ESWT group at 8 and 12 weeks (p = 0.01 and p = 0.04, respectively). Rompe et al. [37] showed an improvement in the VISA-A score (specific for Achilles tendon pathologies) which increased in two groups: one with a treatment by eccentric loading exercises and one with eccentric loading + ESWT. The better outcomes were registered for the second group.

Despite the positive results, this study has some limitations. First of all, there was no patient randomization or use of placebo for any treatment. Moreover, there was no control group and the analysis of outcomes was performed without blind examiners. Our protocols were based on a 3-session ESWT application that, in our opinion, represents a reasonable approach, even if it is not the only approach. Finally, the diagnosis of each pathology was established by all authors, even if the ESWT applications were performed by two dedicated surgeons.

In conclusion, we believe that treatment with extracorporeal shockwaves may be a useful option in the management of several chronic musculoskeletal pathologies, particularly after the failure of a conventional approach. The wide spectrum of applications, the low related costs, and its safety represent the strength of this modern approach to the treatment of disabling musculoskeletal diseases.

Declarations

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical standards

The study conforms to the 1964 Helsinki declaration and its later amendments; the study was approved by the institutional ethical review board; all the patients provided informed consent before being enrolled.

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors’ Affiliations

(1)
Orthopaedic Clinic, University of Florence

References

  1. Ogden JA, Alvarez RG, Levitt R et al (2001) Shock wave therapy (orthotripsy) in musculoskeletal disorders. Clin Orthop 387:22–40View ArticlePubMedGoogle Scholar
  2. Farsi HM, Mosli HA, Alzimaity M et al (1994) In situ extracorporeal shock wave lithotripsy for primary ureteric calculi. Urology 43:776–781View ArticlePubMedGoogle Scholar
  3. Rompe JD, Maffulli N (2007) Repetitive shock wave therapy for lateral elbow tendinopathy (tennis elbow): a systematic and qualitative analysis. Br Med Bulletin 83:355–378View ArticleGoogle Scholar
  4. Thomson CE, Crawford F, Murray GD (2005) The effectiveness of extra corporeal shock wave therapy for plantar heel pain: a systematic review and meta-analysis. BMC Musculoskelet Disord 6:19View ArticlePubMedPubMed CentralGoogle Scholar
  5. Mouzopoulos G, Stamatakos M, Mouzopoulos D et al (2007) Extracorporeal shock wave treatment for shoulder calcific tendonitis: a systematic review. Skeletal Radiol 36:803–811View ArticlePubMedGoogle Scholar
  6. Roehrig GJ, Baumhauer J, DiGiovanni BF et al (2005) The role of extracorporeal shock wave on plantar fasciitis. Foot Ankle Clin 10:699–712View ArticlePubMedGoogle Scholar
  7. Ho C (2007) Extracorporeal shock wave treatment for chronic rotator cuff tendonitis (shoulder pain). Issues in Emerg Health Technol 96:1–4Google Scholar
  8. Farr S, Sevelda F, Mader P et al (2001) Extracorporeal shockwave therapy in calcifying tendinitis of the shoulder. Knee Surg Sports Traumatol 19:2085–2089View ArticleGoogle Scholar
  9. Radwan Y, ElSobhi G, Badawy et al (2008) Resistant tennis elbow: shock-wave therapy versus percutaneous tenotomy. Int Orthop 32:671–677View ArticlePubMedPubMed CentralGoogle Scholar
  10. Saxena A, Ramdath S, O’Halloran et al (2011) Extra-corporeal pulsed-activated therapy (“EPAT” sound wave) for Achilles tendinopathy: a prospective study. J Foot Ankle Surg 50:315–319View ArticlePubMedGoogle Scholar
  11. Rompe JD, Furia JP, Maffulli (2008) Mid-portion Achilles tendinopathy: current options for treatment. Disabil Rehabil 30:1666–1676View ArticlePubMedGoogle Scholar
  12. Rasmussen S, Christensen M, Mathiesen I et al (2008) Shockwave therapy for chronic Achilles tendinopathy: a double-blind, randomized clinical trial of efficacy. Acta Orthop 79:249–256View ArticlePubMedGoogle Scholar
  13. Rodriguez-Merchan EC (2013) The treatment of patellar tendinopathy. J Orthop Traumatol 14:77–81View ArticlePubMedPubMed CentralGoogle Scholar
  14. Wang CJ, Ko JY, Chan YS et al (2007) Extracorporeal shockwave for chronic patellar tendinopathy. Am J Sports Med 35:972–978View ArticlePubMedGoogle Scholar
  15. Wang CJ, Wang FS, Yang KD et al (2006) Long term results of extracorporeal shockwave treatment for plantar fascitis. Am J Sports Med 34(4):592–596View ArticlePubMedGoogle Scholar
  16. Cacchio A, Rompe JD, Furia JP et al (2011) Shockwave therapy for the treatment of chronic proximal hamstring tendinopathy in professional athletes. Am J Sports Med 39:146–153View ArticlePubMedGoogle Scholar
  17. Daecke W, Kusnierczak D, Loew M (2002) Long-term effects of extracorporeal shockwave therapy in chronic calcific tendinitis of the shoulder. J Shoulder Elb Surg 11:476–480View ArticleGoogle Scholar
  18. Benazzo F, Marullo M, Zanon G et al (2013) Surgical management of chronic proximal hamstring tendinopathy in athletes: a 2 to 11 years of follow-up. J Orthop Traumatol 14:83–89View ArticlePubMedPubMed CentralGoogle Scholar
  19. Wang CJ, Huang HY, Pai CH (2002) Shock wave enhances neovascularization at the tendon-bone junction. J Foot Ankle Surg 41:16–22View ArticlePubMedGoogle Scholar
  20. Lian O, Dahl J, Ackermann PW et al (2006) Pronociceptive and antinociceptive neuromediators in patellar tendinopathy. Am J Sports Med 34:1801–1808View ArticlePubMedGoogle Scholar
  21. Ohtori S et al (2001) Shock wave application to rat skin induces degeneration and reinnervation of sensory nerve fibres. Neuroscience 315:57–60Google Scholar
  22. Wang FS, Yang KD, Chen RF et al (2002) Extracorporeal shock wave promotes growth and differentiation of bone-marrow stromal cells towards osteoprogenitors associated with induction of TGF-beta1. J Bone Joint Surg Br 84:457–461View ArticlePubMedGoogle Scholar
  23. Chen YJ, Wurtz T, Wang CJ et al (2004) Recruitment of mesenchymal stem cells and expression of TGF-beta 1 and VEGF in the early stage of shock wave-promoted bone regeneration of segmental defect in rats. J Orthop Res 22:526–534View ArticlePubMedGoogle Scholar
  24. Ioppolo F, Tattoli M, Di Sante L et al (2012) Extracorporeal shock-wave therapy for supraspinatus calcifying tendinitis: a randomized clinical trial comparing two different energy levels. Phys Ther 92:1376–1385View ArticlePubMedGoogle Scholar
  25. Constant CR, Murley AH (1987) A clinical method of functional assessment of the shoulder. Clin Orthop Relat Res 214:160–164PubMedGoogle Scholar
  26. Kitaoka HB, Alexander IJ, Adelaar RS et al (1994) Clinical rating systems for the ankle-hindfoot, midfoot, hallux, and lesser toes. Foot Ankle Int 15:349–353View ArticlePubMedGoogle Scholar
  27. Dawson J, Doll H, Boller I et al (2008) The development and validation of a patient-reported questionnaire to assess outcomes of elbow surgery. J Bone Joint Surg Br 90:466–473View ArticlePubMedGoogle Scholar
  28. Ioppolo F, Rompe JD, Furia JP et al (2014) Clinical application of shock wave therapy (SWT) in musculoskeletal disorders. Eur J Phys Rehabil Med 50:217–230PubMedGoogle Scholar
  29. Pettrone F, McCall BR (2005) Extracorporeal shock wave therapy without local anesthesia for chronic lateral epicondylitis. J Bone Joint Surg Am 87:1297–1304View ArticlePubMedGoogle Scholar
  30. Staples MP, Forbes A, Ptasznik R et al (2008) A randomized controlled trial of extracorporeal shock wave therapy for lateral epicondylitis (tennis elbow). J Rheumat 35:2038–2046Google Scholar
  31. Spacca G, Necozione S, Cacchio A (2005) Radial shock wave therapy for lateral epicondylitis: a prospective randomised controlled single-blind study. Eur Medicophys 41:17–25Google Scholar
  32. Chung B, Wiley JP, Rose MS (2005) Long-term effectiveness of extracorporeal shockwave therapy in the treatment of previously untreated lateral epicondylitis. Clin J Sport Med 15:305–312View ArticlePubMedGoogle Scholar
  33. Collins EDH, Jafarnia KK (2011) A clinical study of extracorporeal shock waves (ESW) for treatment of chronic lateral epicondylitis. Curr Orthop Pract 22:185–192View ArticleGoogle Scholar
  34. Cacchio A, Paoloni M, Barile A et al (2006) Effectiveness of radial shock-wave therapy for calcific tendinitis of the shoulder: single-blind, randomized clinical study. Phys Ther 86:672–682PubMedGoogle Scholar
  35. Gerdesmeyer L, Maier M, Loew M et al (2003) Extracorporeal shock wave therapy for the treatment of chronic calcifying tendonitis of the rotator cuff. JAMA 290:7–10View ArticleGoogle Scholar
  36. Lakshmanan P, O’Doherty DP (2004) Chronic achilles tendinopathy: treatment with extracorporeal shock waves. Foot Ankle Surg 10:125–130View ArticleGoogle Scholar
  37. Rompe JD, Furia J, Maffulli N (2009) Eccentric loading versus eccentric loading plus shock-wave treatment for midportion achilles tendinopathy: a randomized controlled trial. Am J Sports Med 37:463–470View ArticlePubMedGoogle Scholar

Copyright

© The Author(s) 2015

Advertisement