Subacromial bursitis


Subacromial bursitis

Infobox_Disease
Name = Subacromial bursitis


Caption =
DiseasesDB =
ICD10 = ICD10|M|75|5|m|70
ICD9 = ICD9|726.19
ICDO =
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Subacromial bursitis is a condition caused by inflammation of the bursa that separates the superior surface of the supraspinatus tendon (one of the four tendons of the rotator cuff) from the overlying coraco-acromial ligament, acromion, coracoid ( the acromial arch) and from the deep surface of the deltoid muscle . The function of a healthy subacromial bursa is to facilitate the motion of the supraspinatus tendon of the rotator cuff in activities such as overhead work.

Musculoskeletal complaints are one of the most common reasons for primary care office visits, and rotator cuff disorders are the most common source of shoulder pain [cite journal |author=Arcuni SE |title=Rotator cuff pathology and subacromial impingement |journal=Nurse Pract |volume=25 |issue=5 |pages=58, 61, 65–6 passim |year=2000 |pmid=10826138 |doi= |url=] . According to the American Academy of Orthopaedic Surgeons (AAOS) visits to orthopedic specialists for shoulder pain has been rising since 1998 and in 2005 over 13 million patients sought medical care for shoulder pain, of which only 34% were related to injury [ American Academy of Orthopaedic Surgeons Physician Visits for Musculoskeletal Symptoms http://www.aaos.org/Research/stats/Common%20Orthopaedic%20Symptoms%20Seen%20by%20a%20Physician.pdf ] .

Primary inflammation of the subacromial bursa is relatively rare and may arise from autoimmune inflammatory conditions (rheumatoid arthritis), crystal deposition (Gout or Pseudo gout), calcific loose bodies (rheumatoid arthritis) and infectioncite journal |author=Salzman KL, Lillegard WA, Butcher JD |title=Upper extremity bursitis |journal=Am Fam Physician |volume=56 |issue=7 |pages=1797–806, 1811–2 |year=1997 |pmid=9371010 |doi= |url=] . More commonly, subacromial bursitis arises as a result of complex factors, thought to cause shoulder impingement symptoms. These factors are broadly classified as intrinsic (intratendinous) or extrinsic (extratendinous). They are further divided into primary or secondary causes of impingement. Secondary causes are thought to be part of another process such as shoulder instability or nerve injury (Bigliani and Levine, Journal Bone Joint Surgery 1997) cite journal |author=Bigliani LU, Levine WN |title=Subacromial impingement syndrome |journal=J Bone Joint Surg Am |volume=79 |issue=12 |pages=1854–68 |year=1997 |pmid=9409800 |doi= |url=http://www.ejbjs.org/cgi/pmidlookup?view=long&pmid=9409800] .

In 1983 Neer described three stages of impingement syndrome cite journal |author=Neer CS |title=Impingement lesions |journal=Clin. Orthop. Relat. Res. |volume= |issue=173 |pages=70–7 |year=1983 |pmid=6825348 |doi= |url=http://meta.wkhealth.com/pt/pt-core/template-journal/lwwgateway/media/landingpage.htm?issn=0009-921X&volume=173&spage=70] . He noted that "the symptoms and physical signs in all three stages of impingement are almost identical, including the `impingement sign'..., arc of pain, crepitus, and varying weakness." The Neer classification did not distinguish between partial-thickness and full-thickness rotator cuff tears in stage III . This has led to some controversy about the ability of physical examination tests to accurately diagnose between bursitis, impingement,impingement with or with out rotator cuff tear and impingement with partial versus complete tears.

In 2005, Park et al published their findings which concluded that a combination of clinical tests were more useful than a single physical examination test. For the diagnosis of impingement disease, the best combination of tests were “ any degree (of) a positive Hawkins-Kennedy impingement sign, a positive painful arc sign, and weakness in external rotation with the arm at the side,” to diagnose a full thickness rotator cuff tear, the best combination of tests, when all three are positive, were the: “the painful arc, the drop-arm sign, and weakness in external rotation” [cite journal |author=Park HB, Yokota A, Gill HS, El Rassi G, McFarland EG |title=Diagnostic accuracy of clinical tests for the different degrees of subacromial impingement syndrome |journal=J Bone Joint Surg Am |volume=87 |issue=7 |pages=1446–55 |year=2005 |pmid=15995110 |doi=10.2106/JBJS.D.02335 |url=http://www.ejbjs.org/cgi/pmidlookup?view=long&pmid=15995110] .

Natural history

The true natural history of subacromial bursitis may not be known. Patients with a single episode of shoulder pain from isolated bursitis may not seek medical care and may improve over time. Patients with bursitis commonly present for treatment with concomitant shoulder problems such as arthritis, rotator cuff tendinitis, rotator cuff tears, cervical radiculopathy (pinched nerve in neck) and since shoulder pain may arise from structures outside of the shoulder (jaw, neck, heart, gut) the true diagnosis may not be known initially.

In 1997 Morrison et al cite journal |author=Morrison DS, Frogameni AD, Woodworth P |title=Non-operative treatment of subacromial impingement syndrome |journal=J Bone Joint Surg Am |volume=79 |issue=5 |pages=732–7 |year=1997 |pmid=9160946 |doi= |url=http://www.ejbjs.org/cgi/pmidlookup?view=long&pmid=9160946] ., published a study that reviewed the cases of 616 patients (636 shoulders) with impingement syndrome (painful arc of motion) to assess the outcome of non-surgical care. An attempt was made to exclude patients who were suspected of having additional shoulder conditions such as, full-thickness tears of the rotator cuff, degenerative arthritis of the acromioclavicular joint, instability of the glenohumeral joint, or adhesive capsulitis. All patients were managed with anti-inflammatory medication and a specific, supervised physical-therapy regimen. The patients were followed up from six months to over six years. They found that 67% (413 patients) of the patients improved, while 28% did not improve and went to surgical treatment. 5% did not improve and declined further treatment and did undergo surgery.

Of the 413 patients who improved, 74 had a recurrence of symptoms during the observation period and their symptoms responded to rest or after resumption of the exercise program.

The Morrison study shows that the outcome of impingement symptoms varies with patient characteristics. Younger patients ( 20 years or less) and patients between 41 to 60 years of age, fared better than those who were in the 21 to 40 years age group. This may be related to the peak incidence of work, job requirements, sports and hobby related activities, that may place greater demands on the shoulder. However, patients who were older than sixty years of age had the “poorest results”. It is known that the rotator cuff and adjacent structures under go degenerative changes with ageing.

The authors were unable to posit an explanation for the observation of the bimodal distribution of satisfactory results with regard to age. They concluded that is was “unclear why (those) who were twenty-one to forty years old had less satisfactory results”. The poorer outcome for patients over 60 years old was thought to be potentially related to, “undiagnosed full-thickness tears of the rotator cuff” .

Pathophysiology

The literature on the pathophysiology of bursitis describes inflammation as the primary cause of symptoms. Inflammatory bursitis is usually the result of repetitive injury to the bursa.In the subacromial bursa, this generally occurs due to microtrauma to adjacent structures, particularly the supraspinatus tendon. The inflammatory process causes synovial cells to multiply, increasing collagen formation and fluid production within the bursa and reduction in the outside layer of lubrication (Ishii et al, 1997).

Less frequently observed causes of subacromial bursitis include hemorrhagic conditions, crystal deposition and infection. Many causes have been proposed in the medical literature for subacromial impingement syndrome. The bursa facilitates the motion of the rotator cuff beneath the arch, any disturbance of the relationship of the subacromial structures can lead to impingement. These factors can be broadly classified as intrinsic such as tendon degeneration, rotator cuff muscle weakness and over -use. Extrinsic factors include bone spurs from the acromion or A-C joint, shoulder instability and neurologic problems arising outside of the shoulder .

igns and symptoms

Subacromial bursitis often presents with a constellation of symptoms called impingement syndrome.

Pain along the front and side of the shoulder is the most common symptom and may cause weakness and stiffness . If the pain resolves and weakness persists other causes should be evaluated such as a tear of the rotator cuff or a neurological problem arising from the neck or entrapment of the suprascapular nerve.

The onset of pain may be sudden or gradual and may or may not be related to trauma.

Impingement may be brought on by sports activities, such as over head throwing sports, or over head work such as painting, carpentry or plumbing.

Activities that involve repetitive over head activity, or directly in front,may cause shoulder pain. Direct upward pressure on the shoulder, such as leaning on an elbow may increase pain.

Night time pain, especially sleeping on the affected shoulder, is often reported.

Localized redness or swelling are less common and suggest an infected subacromial bursa.

In patients who are less than forty years old, the diagnosis of impingement syndrome should be viewed with caution because these patients may have subtle glenohumeral instability [cite journal |author=Jobe FW, Kvitne RS, Giangarra CE |title=Shoulder pain in the overhand or throwing athlete. The relationship of anterior instability and rotator cuff impingement |journal=Orthop Rev |volume=18 |issue=9 |pages=963–75 |year=1989 |pmid=2797861 |doi= |url=] .

Clinical tests:

It is often difficult to distinguish between pain caused by bursitis or that caused by a rotator cuff injury as both exhibit similar pain patterns in the front or side of the shoulder (Hartley, 1990). Subacromial bursitis can be painful with resisted abduction due to the pinching of the bursa as the deltoid contracts (Buschbacher & Braddom, 1994).If the therapist performs a treatment direction test and gently applies joint traction or a caudal glide during abduction (MWM), the painful arc may reduce if the problem is bursitis or adhesive capsulitis (as this potentially increases the subacromial space).

The following clinical tests, if positive, may indicate bursitis:

  • The patient actively abducts the arm and a painful arc occurs between 800 and 1200. This is due to the compression of the supraspinatus tendon or subacromial bursa between the anterior acromial arch and humeral head. When lowering from full abduction there is often a painful “catch” at midrange. If the patient can achieve adequate muscle relaxation, passive motion tends to be less painful (Starr & Harbhajan, 2001).
  • The patient performs an isometric flexion contraction against resistance of the therapist (Speed’s Test). When the therapist’s resistance is removed, a sudden jerking motion results and latent pain indicates a positive test for bursitis (Buschbacher & Braddom, 1994).
  • Neer’s Sign: If pain occurs during forward elevation of the internally rotated arm above 900. This will identify impingement of the rotator cuff but is also sensitive for subacromial bursitis (Starr & Harbhajan, 2001).

It is interesting to note that an irritation or entrapment of the lower subscapular nerve, which innervates the subscapularis and teres major muscles, will produce muscle guarding at the shoulder that will restrict motion into external rotation, abduction, or flexion. The aforementioned tests will assist in diagnosing bursitis over other conditions (Hartley, 1990).

X-ray and other imaging studies:X-rays may help visualize bone spurs, acromial anatomy and arthritis. MRI imagining can reveal fluid accumulation in the bursa and assess adjacent structures. Ultra sound studies are useful in identifying bursitis.

pecial Considerations

Patients with bursitis who have rheumatoid arthritis, short term improvements are not taken as a sign of resolution and may require long term treatment to ensure recurrence is minimised. Joint contracture of the shoulder has also been found to be at a higher incidence in type two diabetics, which may lead to frozen shoulder (Donatelli, 2004).

Treatment

Many non-operative treatments have been advocated, including rest; oral administration of non-steroidal anti-inflammatory drugs; physical therapy; and local modalities such as cryotherapy, ultrasound, electromagnetic radiation, and subacromial injection of corticosteroids, .

Blair et al, studied the effects of corticosteroid injections on patients with a mean eight month history of duration of symptoms and found that it was an effective short-term treatment for relief of impingement and was able to substantially decrease pain and increase motion cite journal |author=Blair B, Rokito AS, Cuomo F, Jarolem K, Zuckerman JD |title=Efficacy of injections of corticosteroids for subacromial impingement syndrome |journal=J Bone Joint Surg Am |volume=78 |issue=11 |pages=1685–9 |year=1996 |pmid=8934482 |doi= |url=http://www.ejbjs.org/cgi/pmidlookup?view=long&pmid=8934482] .

Shoulder bursitis rarely requires surgical intervention and generally responds favourably to conservative treatment (Starr & Harbhajan, 2001). Surgery is reserved for patients who fail to respond to non-operative measures. Minimally invasive surgical procedures such as arthroscopic removal of the bursa allows for direct inspection of the shoulder structures and provides the opportunity for removal of bone spurs and repair of any rotator cuff tears that may be found.

Early/ initial

Initial phase of physiotherapy rehabilitation

Goals of treatment

  • Reduce inflammation
  • Reduce pain
  • Prevent weakness and atrophy of muscles as a result of disuse
  • Increase the patient’s awareness of bursitis
  • Prevent/reduce impingement and further tissue damage


Treatment

Justification

Advice and education

Educate the patient about their condition and advise to avoid painful activities and the importance of relative rest of the shoulder

Prevention of pain and impingement which delays the healing process

Educate the patient about the importance of correct posture

Puts muscles in the optimal length tension relationship, reducing impingement

Manual therapy

Grade 1 and 2 accessory mobilisations of the glenohumeral joint

Has a neurophysiological affect reducing pain and improving synovial fluid flow, improving healing

Soft tissue massage

Lengthens tight muscles and reduces muscle spasm

Therapeutic exercise

Gentle pendulum range of motion exercises

Maintenance of range of motion and prevention of adhesive capsulitis

Scapular exercises such as shoulder shrugs and shoulder retraction exercises

Improve muscular control and scapular coordination

Centring of humeral head

Helps to facilitate adequate muscle timing and recruitment

Stretching of tight muscles such as the:

Levator scapula, pectoralis major, subscapularis and upper trapezius

To lengthen tight muscles which may improve scapulohumeral rhythm, posture and increase the subacromial space

Rotator cuff strengthening – isometric contractions in neutral and 30 degrees abduction

Improves rotator cuff strength which is integral to the stability of the shoulder and functional activities

Electrophysical modalities

Ice

To reduce inflammation and pain

Low intensity pulsed ultrasound (3Hz)

To reduce inflammation and facilitate healing

External physical aids

May use head of humerus repositioning tape

To maintain the head of humerus in its central position for optimal muscle recruitment

Middle/ intermittent

Intermittent phase of physiotherapy rehabilitation

Goals of treatment

  • Improve muscle control
  • Improve scapulohumeral rhythm
  • Improve active and passive range of motion
  • Restore strength of scapular and rotator cuff muscles


Treatment

Justification

Advice and education

Advise the patient that they must perform all activities and exercises pain free

To prevent reinjury and damage to the bursa

Manual therapy

Grade 3 and 4 accessory mobilisations of the glenohumeral joint

Improves range of motion and increases synovial fluid movement, improving healing

Proprioceptive neuromuscular facilitation (PNF) in functional diagonal patterns

Strengthens muscles, improves motor control and scapulohumeral rhythm

Mobilisation with movement eg caudad glide with active abduction

Improves range of motion and decreases pain

Therapeutic exercise

Specific muscle strengthening exercises especially for scapular depressors (serratus anterior, middle and lower trapezius muscles) eg strengthening lower trapezius muscle – bilateral external rotation using a theraband, strengthening of serratus anterior, punching with theraband resistance

Increases the strength of the scapular depressors which may help to reduce impingement of the bursa by increasing the subacromial space, strengthening also prevents atrophy

Active assisted range of motion - creeping the hand up the wall in abduction, scaption and flexion and door pulley manoeuvre

Help to improve active range of motion and gravity assists with shoulder depression

Active internal and external rotator exercises with the use of a bar or a theraband

Improves strength of rotator cuff and improves mobility in internal and external rotation

Electrophysical modalities

Heat

Improves muscle extensibility

Low intensity pulsed ultrasound (3Hz)

Facilitates healing

External physical aids

May use head of humerus repositioning tape if necessary

To maintain the head of humerus in its optimal position for optimal muscle recruitment

Late/ return to function

Return to function phase of physiotherapy rehabilitation

Goals of treatment

  • Return the patient to their previous level of function
  • Achieve full active and passive range of motion


Treatment

Justification

Education and advice

Education about the importance of a home based exercise program in the late stage of rehabilitation

Ensures patient compliance

Correction of techniques performed

Ensures that the correct target muscles are being used

Education to ensure that the patient performs activities and exercises within pain free limits

This reduces the chance that the patient may work too hard and cause reinjury

Manual therapy

PNF functional patterns with increasing resistance

Continues to strengthens muscles, improves motor control and scapulohumeral rhythm

Therapeutic exercise

Exercises specific for the patient’s functional needs eg functional reaching

To improve the patients functional ability

Proprioception exercises eg Wall push ups with the hands resting on medicine balls or dura disks

Improves proprioception important to reduce reinjury as return to function/sport

Strengthen the shoulder elevators – deltoid, flexors and also lat dorsi.

Important in this phase of the rehabilitation following strengthening of the shoulder depressors.

Progress strengthening exercises to incorporate speed and load to make more functional

Adding speed and load to exercises ensures that the patient is prepared for more functional tasks and activities

Electrophysical modalities

Ice after exercise

May assist to reduce any inflammation post exercise

External physical aids

May use head of humerus repositioning tape if necessary

May assist with return to function

References

Anderson, D., M, (2000), Dorland’s Illustrated Medical Dictionary, 29th ed, W.B. Saunders Company, Canada, 965-967.

Buschbacher, R., M, Braddom, R., L. (1994). Sports medicine & rehabilitation: A sport-specific approach.

Hanley and Belfus Inc, Philadelphia.

Hartley, A. (1990).Practical joint assessment: A sports medicine manual, St Louis, Sydney.

References

External links

*cite book |author=Wilk, Kevin E.; Andrews, James R. |title=The Athlete's shoulder |publisher=Churchill Livingstone |location=Edinburgh |year=1994 |pages= |isbn=0-443-08847-0 |oclc= |doi= |accessdate=
*cite journal |author=Blaine TA, Kim YS, Voloshin I, "et al" |title=The molecular pathophysiology of subacromial bursitis in rotator cuff disease |journal=J Shoulder Elbow Surg |volume=14 |issue=1 Suppl S |pages=84S–89S |year=2005 |pmid=15726092 |doi=10.1016/j.jse.2004.09.022 |url=http://linkinghub.elsevier.com/retrieve/pii/S1058274604002812
*cite journal |author=Brox JI, Gjengedal E, Uppheim G, "et al" |title=Arthroscopic surgery versus supervised exercises in patients with rotator cuff disease (stage II impingement syndrome): a prospective, randomized, controlled study in 125 patients with a 2 1/2-year follow-up |journal=J Shoulder Elbow Surg |volume=8 |issue=2 |pages=102–11 |year=1999 |pmid=10226960 |doi= |url=http://linkinghub.elsevier.com/retrieve/pii/S1058-2746(99)90001-0
*cite journal |author=Butcher JD, Salzman KL, Lillegard WA |title=Lower extremity bursitis |journal=Am Fam Physician |volume=53 |issue=7 |pages=2317–24 |year=1996 |pmid=8638508 |doi= |url=
*cite book |author=Donatelli, Robert |title=Physical therapy of the shoulder |publisher=Churchill Livingstone |location=Edinburgh |year=2004 |pages= |isbn=0-443-06614-0 |oclc= |doi= |accessdate=
*cite journal |author=Handa A, Gotoh M, Hamada K, "et al" |title=Vascular endothelial growth factor 121 and 165 in the subacromial bursa are involved in shoulder joint contracture in type II diabetics with rotator cuff disease |journal=J. Orthop. Res. |volume=21 |issue=6 |pages=1138–44 |year=2003 |pmid=14554230 |doi=10.1016/S0736-0266(03)00102-5 |url=http://dx.doi.org/10.1016/S0736-0266(03)00102-5
*cite book |author=Hartley, Anne |title=Practical joint assessment: a sports medicine manual |publisher=Mosby Year Book |location=St. Louis, MO |year=1990 |pages= |isbn=0-8016-2050-3 |oclc= |doi= |accessdate=
*cite book |author= |title=Sports Medicine and Rehabilitation: A Sport-Specific Approach |publisher=Lippincott Williams & Wilkins |location=Hagerstown, MD |year=1994 |pages= |isbn=1-56053-133-9 |oclc= |doi= |accessdate=
*cite journal |author=Lo IK, Boorman R, Marchuk L, Hollinshead R, Hart DA, Frank CB |title=Matrix molecule mRNA levels in the bursa and rotator cuff of patients with full-thickness rotator cuff tears |journal=Arthroscopy |volume=21 |issue=6 |pages=645–51 |year=2005 |pmid=15944617 |doi=10.1016/j.arthro.2005.03.008 |url=http://linkinghub.elsevier.com/retrieve/pii/S0749806305003166
*cite journal |author=Ishii H, Brunet JA, Welsh RP, Uhthoff HK |title="Bursal reactions" in rotator cuff tearing, the impingement syndrome, and calcifying tendinitis |journal=J Shoulder Elbow Surg |volume=6 |issue=2 |pages=131–6 |year=1997 |pmid=9144600 |doi= |url=
*cite journal |author=McAfee JH, Smith DL |title=Olecranon and prepatellar bursitis. Diagnosis and treatment |journal=West. J. Med. |volume=149 |issue=5 |pages=607–10 |year=1988 |pmid=3074561 |pmc=1026560 |doi= |url=
*cite journal |author=Perry J |title=Anatomy and biomechanics of the shoulder in throwing, swimming, gymnastics, and tennis |journal=Clin Sports Med |volume=2 |issue=2 |pages=247–70 |year=1983 |pmid=9697636 |doi= |url=
*cite journal |author=Reilly JP, Nicholas JA |title=The chronically inflamed bursa |journal=Clin Sports Med |volume=6 |issue=2 |pages=345–70 |year=1987 |pmid=3319205 |doi= |url=cite journal |author=Trojian T, Stevenson JH, Agrawal N |title=What can we expect from nonoperative treatment options for shoulder pain? |journal=J Fam Pract |volume=54 |issue=3 |pages=216–23 |year=2005 |pmid=15755374 |doi= |url=http://www.jfponline.com/Pages.asp?AID=1886
*cite book |author=Shamus, Jennifer; Shamus, Eric |title=Sports injury: prevention & rehabilitation |publisher=McGraw-Hill Medical Pub. Div |location=New York |year=2001 |pages= |isbn=0-07-135475-1 |oclc= |doi= |accessdate=
*cite journal |author=Starr M, Harbhajan K |title=Recognition and Management of Common Forms of Tendinitis and Bursitis |journal=The Canadian Journal of Continuing Medical Education |volume= |issue= |pages=155–63 |year=2001 |month=June |issn=0843-994X |pmid= |doi= |url=http://www.stacommunications.com/journals/cme/images/cmepdf/june01/tendinitisbursitis.pdf
*cite journal |author=Trojian T, Stevenson JH, Agrawal N |title=What can we expect from nonoperative treatment options for shoulder pain? |journal=J Fam Pract |volume=54 |issue=3 |pages=216–23 |year=2005 |pmid=15755374 |doi= |url=http://www.jfponline.com/Pages.asp?AID=1886
*cite journal |author=van Holsbeeck M, Strouse PJ |title=Sonography of the shoulder: evaluation of the subacromial-subdeltoid bursa |journal=AJR Am J Roentgenol |volume=160 |issue=3 |pages=561–4 |year=1993 |pmid=8430553 |doi= |url=http://www.ajronline.org/cgi/pmidlookup?view=long&pmid=8430553
*cite journal |author=Yanagisawa K, Hamada K, Gotoh M, "et al" |title=Vascular endothelial growth factor (VEGF) expression in the subacromial bursa is increased in patients with impingement syndrome |journal=J. Orthop. Res. |volume=19 |issue=3 |pages=448–55 |year=2001 |pmid=11398859 |doi=10.1016/S0736-0266(00)90021-4 |url=


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