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Achilles Tendon Injuries Johan Myburgh September 2011.

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Presentation on theme: "Achilles Tendon Injuries Johan Myburgh September 2011."— Presentation transcript:

1 Achilles Tendon Injuries Johan Myburgh September 2011

2 Hippocrates “ this tendon if bruised or cut, causes the most acute fevers, induces choking, deranges the mind and at length brings death.”

3 PATIENT 31 year old male Recreational soccer player Work - oilfield worker Healthy - no significant past hx Played varsity soccer and football till 23 years old

4 Injury Came directly from work, no warm up Previous tightness and tenderness calf few days 5 minutes into game: Pushed off back to leg drive forward Sudden pain and weakness left leg

5 3 Stage Assessment 1. Clinical: 80% acute partial Achilles tendon rupture Previous sprain of Triceps surea Improper warm up before activity

6 3 stage assessment 2. Personal: concerned about the amount of time he is going to loose at work- no income. positive about the outcome and wants to do proper rehabilitation to speed up his recovery 3. Contextual: manager at work is supportive seasonal work - needs to recover before the work season is over. family is very supportive.

7 Treatment Nonoperative treatment plan o Immobilized equinis cast for 7 weeks o Removable walking splint for 6 weeks Patient did 3 weeks o Physiotherapy starting at week 7 Progression: Week 13 physical exam: o Dorsiflexion L 96° R 105° o Tendon thickness L 30 mm R 19 mm

8 Achilles tendon

9 Anatomy Formed by tendinous portion of gastrocnemius and soleus ( contribution varies) Progresses from round to flat distally to insert on calcaneal tuberosity Distal rotational twist (90°) o gastrocnemius fibers insert lateral o soleus fibers insert medial Plantaris lies medial - distinct tendon (absent 6-8%) No synovial sheath – wrapped paratenon

10 Blood Supply o Posterior tibial artery - majority of the blood supply Musculotendinous junction Bone-tendon junction o Peroneal artery Surrounding connective tissue (paratenon/mesotenon) Poor vascularization in midportion of tendon o Angiographic and histological techniques showed Achilles tendon has a poor blood supply throughout its length = small number of blood vessels per cross-sectional area (1,4)

11 Histology Fibroblasts (Embedded in bundles of fibrils) Collagen comprises 70% of tendon o 95% type I o Ruptured tendon contains significant type III collagen Collagen of granulation tissue - produced quickly by young fibroblasts before tougher type I collagen is synthesized Wavy bundles collagen

12 Histology Collagen organized into parallel bundles of fibrils Surrounded by endotenon Units surrounded by vascular epitenon

13 Pathology Achilles tendon disorders and overuse injuries: 1.Inflammation of the peritendinous tissue (peritendinitis,paratendinitis) 2.Degeneration of the tendon (tendinosis) 3.Tendon rupture Partial/Complete Acute/Chronic 4.Insertional disorders (retrocalcaneal bursitis and insertional tendinopathy)

14 Tendinosis Degeneration with no significant inflammation: Hypoxic or fibromatous: o most frequently seen in ruptured tendons Myxoid o 2nd most common o May be silent prior to rupture Lipoid o Age dependent fatty deposits that do not affect structural properties Calcific o Calcium pyrophosphate

15 Acute Rupture Achilles tendon

16 Etiology – Intrinsic Factors General Decreased perfusion Hyperthermia within relatively avascular Achilles tendon – more prone rupture Systemic diseases Inflammatory and autoimmune conditions Collagen disorders Infectious disease Neurologic conditions Age >30 Decrease in maximum diameter & density of collagen fibrils

17 Etiology – Extrinsic factors o General Corticosteroids Corticosteroid injection into rabbit tendons showed necrosis and delayed healing. Several studies showed collagen damage with injected steroids. Oral steroids also implicated (2) Fluoroquinolone (3)

18 Etiology – Extrinsic factors Biomechanical factors o Rapid push off Tendon obliquely loaded, muscle maximum contraction and initial short tendon length o Functional / Anatomical conditions Imbalance agonist muscle contractions (7) Functional overpronation on heel strike (midfoot) – whipping action on Achilles – intratendinous microtears Poor flexibility gastroc/soleus - overpronation

19 Etiology – Extrinsic factors Biomechanical factors o Unequal tensile forces of different parts tendon - torsional ischemic affect (transient vasoconstriction of intratendinous vessels, contribute vascular impairment already present ) o Malfunction/Suppression of proprioceptive component of skeletal muscle (athletes resume training after period rest)

20 Epidemiology Incidence increasing significantly 8.3 ruptures per 100 000 people (18) Gender o Males 2:1 over females Age (two peaks) o 30-50 – sports activity-related o > 50 – non-athletes and women Sport o abrupt repetitive jumping o sprinting movements Race - increased African-Americans (8)

21 Histology of Rupture Collagen degeneration of tendon prior to rupture (4) Marked inflammatory reaction Hypertrophy of tunica media and narrowing of lumen of large peritendinous vessels (1) - hypoxia All based on biopsy at time of surgical repair

22 Site of Rupture Myotendinous Junction Midsubstance 2-6 cm proximal to insertion Hypovascular Avulsion

23 Diagnosis History Male between 30 and 50 years Sedentary job but in athletic activity “Weekend Warrior” Pop, “kicked” in the back of the leg Pain posteriorly in calf. Pain is variable Bruising

24 Diagnosis Clinical dx Physical: Palpable defect Thompson Test Single leg heel raise Bruising/Swelling Weakness

25 Thompson Test Patient prone with feet dangling - squeeze mid calf NO plantar flexion = positive Thompson test /Ruptured tendon

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28 Diagnosis Diagnostic Tests o Ultrasound (Doubtful cases) Helpful with Non-operative treatment Used to assess gap in tendon and apposition of torn ends of tendon o MRI (not routinely) Show extent of tendon degeneration o X-rays Avulsion of calcaneus suspected

29 Ultrasound = Hematoma in Achilles tendon Most widely used U.K + Inexpensive Readily available, fast Dynamic assessment Tendon thickness Gap // torn ends − Operator dependent Miss partial tears

30 MRI Most widely used imaging U.S + Accurate Partial tears − Not readily available High cost No dynamic assessment

31 Classification of Achilles tendon tear/rupture (17)

32 Nonoperative Treatment Effective for all age groups and both sedentary and sporting individuals Wide variability among surgeons o absolute immobilization o initial range of movement exercises o progression weight bearing status Cast immobilization 4-8 week (non-weight bearing) Functional brace 4-6 weeks Use ultrasound to ensure tendon apposition

33 Nonoperative Treatment Higher rerupture rate (13%) vs. operative repair (4-5%) (10) Fewer overall complications ( wound infection) o Complications may be reduced with percutaneous surgery

34 Acute Complete Rupture

35 Surgical treatment Two Decisions Postoperative regime Surgical technique

36 Surgical Technique Direct Open (Incision 10-18 cm) Mini-invasive (Incision 3-10 cm) Percutaneous (multiple small incisions)

37 Percutaneous Achilles Repair vs. Open repair: o Higher rerupture rate (6.4% vs 2.7%) o Fewer complications Allow earlier mobilization Earlier functional rehabilitation Sural nerve entrapment

38 Open Repair Incision site reduce risk injury sural nerve and branches. Easier access plantaris muscle Postero-medial incision

39 Plantaris tendon

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43 Percutaneous Repair Achillon Device

44 Complications of Surgical Treatment Wound healing problems/necrosis Wound infection Sural nerve injury DVT and PE Rerupture 2-5%

45 Wound necrosis

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49 Chronic Rupture Definition: 4-6 weeks from time of injury to diagnosis and treatment Conservative management not recommended Fibrous tissue in gap between torn ends Poor plantar flexion strength (2° flexors foot) Open repair and reconstruction

50 Postoperative Regime Consensus Early functional weight bearing and range of motion decrease: Inpatient stay Time off from work Faster return to sport Lower complication rate No Consensus DVT prophylaxis DVT common after Achilles tendon rupture No evidence to demonstrate benefit Start ROM exercises Day 10 / earlier as per pt’s comfort Day 14 weight bearing with restricted dorsiflexion

51 Rehab Principles Mobilization o Cycle 10-15 min/day Loading o Treadmill Incline Walk (pain free) Stretching o Straight, bend knee Proprioception Ankle eversion/inversion o Tubing

52 Healing and Repair Mechanism

53 Achilles Tendon Healing Slow healing – hypovascularity + hypocellularity Phases o Inflammation o Proliferation o Repair o Remodeling Stress on tendon – remodeling ( similar to bones) o Stronger, stiffer o Achieved by increased collagen synthesis alteration fibre alignment Mobilization increased inflammatory cells at rupture site (16)

54 Tendon Healing bbbbbbbb Inflammatory Phase Reparative (Proliferation ) Phase Remodeling/Consolidation Phase Remodeling/Maturation Phase TIME - months 24 hr 3 days 123456789101112

55 Histology healing Microscopic view of a tendon undergoing healing the white "bubble" is the suture note increase in cells Microscopic view of a normal tendon wavy pink material is the collagen very few cells

56 Achilles Tendon Healing Important factors Tension across repair o speeds realignment fibres o increases tensile strength o minimize deformation Early motion o Accelerates nerve plasticity through regeneration and release neuromediators

57 Sport Resumption Time to return to sport depends level sport Average 20-24 weeks Olympic level up to nine months Functional brace post-op 4 weeks earlier Signs to slow down /speed up rehabilitation o Pain and swelling after activity o Delayed tissue healing - Ultrasound

58 Sport Resumption Levels o Walking – Casted 12 weeks after surgery Brace 8 weeks after surgery o Recovery of force, speed and endurance - 4-6 weeks o Non-contact sport - 4-6 weeks o Contact sport – 4-6 weeks

59 Take Home Message o Degeneration present at time of rupture o Early mobilization and weight bearing - improved functional outcomes

60 THANK YOUTHANK YOU

61 References 1.Ahmed, M. Lagopoulos, M., McConnell, P., Soarnes, R. W., Sefton, G. K Blood supply of the Achilles tendon. J. Orthop. Res. 16:591-596, 1998. 2.Balasubramaniam P, Prathap K. The effectof injection of of hydrocortisone into rabbital calcaneal tendons. J. Bone and Joint Surgery 1972;54-B:729-734 3.Royer RJ, Pierfitte c, Netter P. Features of tendon disorders with fluoroquinolones. Therapie 1994;49:75-76 4.Weatherall, J, Mroczek, K, & Tejwani, N 2010, 'Acute Achilles tendon ruptures', Orthopedics, 33, 10, pp. 758-764 5.Maffulli,n, Barrass, V, Stanley W.B. Ewen, Light Microscopic Histology of Achilles Tendon Ruptures. A Comparison With Unruptured Tendons, Am J Sports Med November 2001 vol. 28 no. 6 857-863 6.Kannus, P., Jozsa, L. Histopathological changes preceding spontaneous rupture of a tendon. 1. Bone Joint Surg. 73-A:1507-1525, 1991. 7.Waterson S. Subcutaneous rupture of Achilles tendon: Basic science and some aspectes of clinical practice. Br J Sports Med 1997;31:285-298 8.Davis JJ,Mason KT, Calrk DA. Achilles tendon ruptures stratified by age, race, and cause of injury among active duty U.S. Military members. Mil Med 1999;164:872-873 9.Steven B. Weinfeld, MD, Associate Professor of Orthopaedic Surgery Chief Foot and Ankle Service, Mount Sinai Medical Center, NY

62 References 10.Lo IK, Kirkley A, Nonweiler B, Kumbare DA. Operative treatment vs non-operative treatment of acute Achilles tendon ruptures: A quantitative review. Clin J Sports Med1997;38:822-828 11.Forrester JC, ZederfeldtBH, Hayes TL. Wolff’s law in relation to the healing skin wound. Journal of Trauma-Injury Infection & Critical care 1970;10: 770-779 12.Virchenko O, Skoglund B, Aspenberg P. Parecoxib inpair early tendon repair but improves later remodeling. Am J Sports Med 2004;32;1743-1747 13.Virchenko O,Aspenberg P. How can one platelet injection after tendon injury lead to a stronger tendon after 4 weeks? Interplay between early regeneration and mechanical stimulation. Acta Orthopod 2006;77:806-812 14. Virchenko O, Lindahl T, Aspenberg P. Low Molecular Weight Heparin impairs tendon repair. J Bone Joint Surg (B) 2007: in press 15.Burssens P, steyaert A, Forsyth R, van Ovost EJ, Depaepe Y, Verdonk R. Exogenously administered substance P and neuropeptidase inhibitors stimulate fibroblast proliferation, angiogenesis and collagen organization durinf Achilles tendon healing. Foot Ankle Int 2005;26:832-839 16. Palmes et al J of Orthopaedic Research 2002 17. Kuwada GT. Classification of teno Achilles rupture with consideration of surgical repair techniques. J Foot Surg.1990;29:361-365

63 References 18. Suchak AA, Bostick G, Reid D, Blitz S. The incidence of Achilles tendon ruptures in Edmonton, Canada. Foot Ankle Int. 2005;26(11):932-936


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