The Value of Platelet-Rich Plasma in Chronic Midportion Achilles Tendinopathy: a Double-blind Randomized Clinical Trial (PRICT)

The study will be a double-blind randomized single-center clinical trial comparing 3 treatment groups with chronic midportion Achilles tendinopathy.

Study Overview

• Status: Completed
• Conditions: Achilles Tendinopathy
• Intervention / Treatment: Biological: PRP Injection with eccentric exercises; Biological: Placebo Injection with eccentric exercises

Detailed Description

Introduction- Overuse injury of the Achilles tendon is a common entity in athletes and older athletes are at an increased risk. When the exact origin of tendon pain is unclear, the term tendinopathy is preferred. Most accepted treatment at this moment is an eccentric exercise programme, according to the Dutch guidelines. However, a recent systematic review on the effectiveness of eccentric exercises to treat lower extremity tendinoses concluded that it is unclear whether eccentric exercises are more effective than other forms of treatment.

Recent studies described new treatment strategies in tendinopathies, such as the use of platelet-rich plasma (PRP). Platelets can participate actively in tissue repair processes and stimulate the release of several growth factors. Recently, it was found that platelet-rich plasma clot releasate stimulates cell proliferation, collagen deposition, and enhances the gene expression of matrix degrading enzymes and endogenous growth factors by human tendon cells in vitro. The only published clinical cohort study in tendon research reported 93% reduction of pain for PRP-treated patients with chronic elbow tendinosis. Also on short term follow-up, the PRP injection was more beneficial than injection with an anaesthetic agent.

Aim- To monitor the potential clinical improvement of chronic midportion Achilles tendinopathy after injection with PRP and to evaluate the recovery process in time using a new Ultrasonographic method (Ultrasonographic Tissue Characterisation).

Hypothesis: The average VISA-A score is higher in the patient group treated with eccentric exercise therapy in combination with a PRP injection in comparison with the group treated with a saline injection in combination with eccentric exercises.

Study population- In total, 54 patients with symptomatic Achilles tendinopathy will be included in the study.

Study design- The study will be a double-blind randomised single-centre clinical trial comparing 2 treatment groups. The researcher, the sports medicine physician and the patients will be blinded to the received therapy.

Therapy- All patients will perform a heavy load eccentric exercise programme, consisting of 180 repetitions daily. The patients will be randomised into 2 treatment groups: ultrasound guided intratendinous saline injection with eccentric exercises and ultrasound guided intratendinous PRP injection with eccentric exercises.

Follow-up- Follow-up (clinically and ultrasonographically) will be at 6, 12, 24 and 52 weeks. At 24 weeks, the researcher will be unblinded after the analysis of the preliminary data. The patients will remain blinded to the therapy until 52 weeks follow-up. At 52 weeks follow-up a second, blinded researcher will evaluate the patients using the primary and secondary outcome measurements.

Outcome measurements- Primary outcome measurement: VISA-A score, a validated instrument to detect the severity of symptoms in patients with Achilles tendinopathy. As secondary outcome measurements subjective patient satisfaction and return to sports will be rated. For the evaluation of tendon repair, Ultrasonographic Tissue Characterization (UTC) and Power Doppler ultrasound (PDU) will be performed. UTC was previously developed in horse tendons and provides quantitative information on tendon fiber alignment and the related ultra-structural integrity of the tendon tissue through a non-invasive approach.

• Study Type: Interventional
• Enrollment (Actual): 81
• Phase: Phase 4

Contacts and Locations

Study Locations

• Netherlands
  • Rotterdam, Netherlands
    • Erasmus Medical Center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 14 years to 66 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion criteria

1. Clinical diagnosis "chronic midportion Achilles tendinopathy"
2. Age 18-70 years

Exclusion criteria

1. Clinical suspicion of insertional disorders (pain at the site of the insertion of the Achilles tendon on the calcaneum)
2. Clinical suspicion of an Achilles tendon rupture (Thompson test abnormal and palpabel "gap")
3. Clinical suspicion of plantar flexor tenosynovitis (posteromedial pain when the toes are plantar flexed against resistance)
4. Clinical suspicion of n.suralis pathology (sensitive disorder in the area of the sural nerve)
5. Clinical suspicion of peroneal subluxation (visible luxation of the mm. Peroneï spot in combination with localized pain)
6. Suspicion of internal disorders: spondylarthropathy, gout, hyperlipidemia, Rheumatoid Arthritis and sarcoidosis.
7. Condition that prevents the patients from executing an active exercise programme
8. Patient has already performed eccentric exercises, according to the schedule of Alfredson et al (12 weeks)
9. Patient has already received an injection of PRP for this injury
10. Patient does not wish, for whatever reason, to undergo one of the two treatments
11. Known presence of a pregnancy
12. Condition of the Achilles tendon caused by medications (arising in relation to moment of intake), such as quinolones and statins

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Double

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: 1; Combination of eccentric exercises and injection of PRP	Biological: PRP Injection with eccentric exercises; PRP Injection with eccentric exercises
Placebo Comparator: 2; Combination of eccentric exercises and physiological saline injection	Biological: Placebo Injection with eccentric exercises; Placebo Injection with eccentric exercises

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
VISA-A Score	6, 12, 24 and 52 weeks

Secondary Outcome Measures

Outcome Measure	Time Frame
Ultrasonographic Tissue Characterization	6,12, 24 and 52 weeks
Complications	Anytime
Power doppler sound	6, 12, 24 and 52 weeks
Patient satisfaction	6, 12, 24 and 52 weeks
Return to sport	6, 12, 24 and 52 weeks

Collaborators and Investigators

• Sponsor: Zimmer Biomet
• Collaborators: Erasmus Medical Center
• Investigators: Principal Investigator: RJ De Vos, MD, Erasmus Medical Center

Publications and helpful links

General Publications

• de Vos RJ, Weir A, van Schie HT, Bierma-Zeinstra SM, Verhaar JA, Weinans H, Tol JL. Platelet-rich plasma injection for chronic Achilles tendinopathy: a randomized controlled trial. JAMA. 2010 Jan 13;303(2):144-9. doi: 10.1001/jama.2009.1986.

Study record dates

Study Major Dates

• Study Start: August 1, 2008
• Primary Completion (Actual): February 1, 2009
• Study Completion (Actual): August 1, 2009

Study Registration Dates

• First Submitted: September 25, 2008
• First Submitted That Met QC Criteria: September 26, 2008
• First Posted (Estimate): September 29, 2008

Study Record Updates

• Last Update Posted (Actual): May 18, 2017
• Last Update Submitted That Met QC Criteria: May 17, 2017
• Last Verified: May 1, 2017

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Wounds and Injuries; Musculoskeletal Diseases; Muscular Diseases; Tendon Injuries; Tendinopathy
• Other Study ID Numbers: BMET NL 02; NTR1420