Frozen Shoulder Treatment Singapore
MBBS (SINGAPORE) MMED (ORTHO) FRCS ED (ORTH)
Frozen shoulder is a condition in which the capsule of the joint becomes inflamed, thickened and stiff, hence severely restricting movements of the joint.
Patients with this condition are often middle-aged or elderly. It is vital to understand your symptoms and seek medical treatment as soon as possible, as early diagnosis and management can reduce the complications of frozen shoulder.
What Is Frozen Shoulder?
Frozen shoulder, or adhesive capsulitis, is a common condition that affects 2% to 5% of the general population and up to 20% of individuals with diabetes.
The condition is characterised by stiffness and pain in the shoulder joint, leading to restricted movement. It can affect the entire shoulder area, from the base of the neck to the tip of the shoulder, both front and back. It often causes pain and limited motion, which can sometimes be confused with issues from the cervical spine (neck) or other shoulder problems.
Shoulder pain can also be linked to specific activities, such as overuse during sports like tennis or volleyball or from gym exercises like bench presses or shoulder presses.
What Causes Frozen Shoulder?
- Inflammation: Inflammation in the shoulder joint leads to the thickening and tightening of the joint capsule. This process restricts the shoulder joint’s movement, ultimately causing the shoulder to become stiff and immobile.
- No Apparent Cause: Sometimes, it can occur without an obvious reason. This is referred to as a primary frozen shoulder and can develop spontaneously with no preceding injury or condition.
Risk Factors for Frozen Shoulder
While the exact causes of frozen shoulder are unclear, the following factors and conditions can increase the risk of developing it:
Age (40 years and older)
Frozen shoulders tend to be more common in people over 40, with the risk increasing as we age.
Prolonged Immobility
Keeping your shoulder immobilised for long periods, whether due to injury or other reasons, can lead to frozen shoulder.
Rotator Cuff Injury
Injuries to the rotator cuff can limit shoulder movement, increasing the risk of frozen shoulder.
Recovery from Surgery
Post-surgical immobility, especially after shoulder or chest surgery, can contribute to frozen shoulder.
Broken or Fractured Arm
A broken or fractured arm can restrict shoulder movement during healing, raising the risk of developing frozen shoulder.
Diabetes
Individuals with diabetes are more prone to frozen shoulder, with studies showing that it occurs more frequently in diabetic patients.
Thyroid Disorders
Conditions such as hyperthyroidism or hypothyroidism can also increase the risk of frozen shoulder
Cardiovascular Diseases
People with cardiovascular diseases are more susceptible to developing frozen shoulder, although the exact reasons are not fully understood.
Tuberculosis
Tuberculosis can cause joint inflammation, including in the shoulder, increasing the likelihood of frozen shoulder.
Stroke
Stroke survivors often have limited mobility, leading to frozen shoulder due to prolonged immobility.
Symptoms of Frozen Shoulder
Frozen shoulder often starts with pain and stiffness, making moving your shoulder challenging. Here’s a breakdown of what to expect:
Pain and Stiffness
The most common issues are pain and stiffness that limit your mobility. You’ll likely feel the pain in your arm under the deltoid muscle.
Initial Mild Injury
It might begin with a seemingly insignificant incident like a slight jerk while commuting or a mild twinge when reaching for something. This pain can gradually worsen over the next few weeks or months.
Varying Pain Intensity
For some, the pain can be a mild, nagging discomfort; for others, it can be severe enough to interfere with daily activities.
Movement Restrictions
You may experience stiffness, especially when trying to rotate your arm inward. For example, men might find it challenging to put their wallets in their back pockets, and women might struggle to reach behind to clasp their bra.
Weakness
You might also feel a weakness in your arm, primarily due to the pain when lifting things or moving your shoulder beyond its limited range.
How Is Frozen Shoulder Diagnosed?
Your doctor will physically examine your shoulders to check for symptoms such as pain or joint stiffness as well as test the shoulder’s range of motion and mobility.
Additional diagnostic tests may also be performed to obtain further information on the shoulder joints or to rule out other possible problems:
- X-rays can reveal problems in the shoulders, such as arthritis.
- MRI scans provide more detailed images of the shoulder joints to help identify other problems, such as a torn rotator cuff.
How Is Frozen Shoulder Treated?
Treatment of frozen shoulders depend on the phase at which the patients present. Generally, treatment comprises pain relief and physiotherapy.
Most frozen shoulders will resolve with time and noninvasive treatment modalities as described above. However, not all do. For cases that fail to improve, invasive treatment options may be required.
Common non-surgical treatment methods include:
- Taking over-the-counter pain relievers, such as aspirin, ibuprofen or etoricoxib, can help reduce pain and inflammation
- Physical therapy
- Corticosteroid injections
- Joint distension or injecting sterile water into the joint capsule to stretch and tear the tissue and improve mobility
Surgery may be recommended if your symptoms worsen or if non-surgical treatment options are ineffective.
Some of the common surgical treatment options include:
- Manipulation under anaesthesia. This procedure involves moving your shoulder joints in different directions to tear the tightened tissue, so as to increase the shoulder’s mobility. Shoulder manipulation is typically performed under general anaesthesia.
- Surgery. Surgery for frozen shoulder rapidly relieves pain and restores shoulder mobility. Surgery is typically conducted arthroscopically, where your doctor will create 2 small incisions around your shoulder before inserting a camera into the shoulder joint, allowing the thickened capsule to be divided under direct vision. It is a very safe and effective treatment for frozen shoulders.
Anatomy of the Shoulder Joint
The shoulder joint is made up of 3 bones: the shoulder blade (scapula), the humeral head and the collar-bone (clavicle).
Movements around the shoulder involve 3 separate articulations: the glenohumeral joint, the acromioclavicular joint and the scapulothoracic articulation. When the arm is raised, the majority of movement occur at the glenohumeral joint and the scapulothoracic articulation.
The glenohumeral joint is a ball and socket joint, comprising the socket (the glenoid) and the ball (the humeral head). Both surfaces of the joint are covered with an extremely smooth and rubbery cartilage (known as articular cartilage).
The smooth surfaces create a frictionless articulation when lubricated with a small amount of joint fluid. The glenohumeral joint is housed within a strong covering known as the capsule. The capsule keeps the joint separate from the surrounding tissues like muscles.
In normal, healthy shoulders, the capsule has a pale pearly appearance, and is rather thin (1-2mm perhaps).
Frequently Asked Questions
What kind of invasive treatments are there?
Hydrodilation:
Hydrodilatation is a procedure during which a needle is introduced into the shoulder joint, under some form of image guidance (usually using x-rays), and a large volume of saline and local anaesthetic is injected forcefully to distend or even rupture the capsule of the shoulder joint.
Scientific evidence of the efficacy of this procedure is fairly good in terms of improvement in movement in the shoulder. However, this is not a procedure I often prescribe. The main reason is that this procedure can be very painful for the patient and that severely limits the amount of dilatation that can be achieved.
Manipulation under anaesthesia (MUA):
This is a procedure that is done under general anaesthesia. The patient is anaesthetized and the surgeon forces the shoulder into full movements by forcefully manipulating it and tearing the joint capsule.
I never perform this procedure by itself due to the very real risk of causing a much bigger complication. I have seen patients end up with broken arms and shoulder dislocations after having these procedures done, even by experienced and senior surgeons.
The risk is even higher if the patient is thin and petite, and breaking such patients’ arms is actually much easier than you might imagine! The last thing I want is for a patient to go to sleep (under anaesthesia) with a frozen shoulder and wake up with a broken arm which will likely require a different surgery to fix!
Arthroscopic capsular release (ACR):
This is the procedure I usually perform in patients whose frozen shoulder does not improve despite having done physiotherapy for a fair amount of time (perhaps a few months).
Some other patients may not have the patience (no pun intended!) to wait out the natural course of the condition and may prefer a good way to “short-circuit” the recovery.
In an ACR procedure, the patient is put under general anaesthesia and just 2 small incisions are made (one at the front and one at the back of the shoulder). These incisions just need to be 4mm long. This will permit me to insert a camera into the shoulder joint and divide the thickened capsule under direct vision.
As the surgery is done under direct vision, the procedure is very safe. At the end of the procedure, I then gently manipulate the shoulder to get optimal movements out of the shoulder. This manipulation is very gentle and very little force is required, hence eliminating the risk of causing fractures or dislocations.
The pain relief after the procedure is usually very satisfactory. Though conceptually easy, this surgery can be rather tricky sometimes due to the very small space in the shoulder joint resulting from the frozen shoulder.
As such, if the surgeon is not suitably experienced, attempts to perform this procedure may result in scuffing and damage to the smooth articular surfaces of the shoulder joint. So, do ensure your surgeon is experienced with shoulder surgery and you will be most happy with the results!
Is frozen shoulder serious? When should I visit a doctor?
While frozen shoulder is not life-threatening, it can bring significant pain and result in severe loss of shoulder mobility if left untreated.
You should seek proper medical treatment if your symptoms persist for an extended period of time or if they interfere with your daily activities.
Can frozen shoulders be prevented?
Gentle stretching and progressive range-of-motion shoulder exercises can help prevent frozen shoulders, especially after surgery or an injury.
What will the doctor do?
Your doctor will chat with you and ask you more about the. A careful examination of the shoulder is then carried out. He (I will use “he” to refer to the doctor to simplify the discussion although clearly, there are many female doctors out there!) will need to visually inspect your shoulders, looking out for any asymmetry or wasting of the muscles.
He then feels around the shoulder looking for any tender spots which may give a clue as to the source of the problem. This may be particularly hard in large or muscular patients.
He then tests your shoulder movements. The range of movements in patients with frozen shoulders often depends on how long he/she has been having the condition.
In early cases, patients may have close to full range of movement. However, in patients a few months into the condition, they may have globally reduced movements (i.e. movements of the shoulder are reduced in all angles).
By this time, your doctor should be reasonably sure of his diagnosis of a frozen shoulder. The only other condition that may closely mimic a frozen shoulder is that of shoulder arthritis. This is a condition where the cartilage of the glenohumeral joint is worn out.
Please see the section on shoulder arthritis if you would like to learn more.
What tests can be done to confirm the diagnosis?
Many doctors may begin their investigations with x-rays for the shoulder. In frozen shoulders, however, X-rays are often completely normal. Having said that, I often do proceed with either x-rays or more detailed scans to ensure that I am not dealing with shoulder arthritis or other superimposed problems like a rotator cuff tear, for example.
An MRI (magnetic resonance imaging) scan may be useful in frozen shoulders, but it is not necessary for diagnosis. I mainly perform MRI scans in patients only if I am unsure if there might be a rotator cuff problem or if his/her symptoms and presentation is unusual.
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