Diagnostic facet joint blocks, medial branch blocks and Sacroiliac Joint blocks
Facet joint blocks and SI Joint blocks are used to test whether there is pain coming from the joints of the spine. They are done with local anaesthetics and steroid. Usually there is increased pain after the local anaesthetic has worn off and before steroids start acting for 2 or 3 days followed by possible relief. Occasionally the aggravation in pain can go on for longer. These facet joint blocks tend not to cause long-term relief of symptoms but can be helpful to decide whether to go on to facet joint denervation, a procedure that may lead to a better long-term relief.
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Spinal facet joint and Sacroiliac joint radiofrequency ablation / denervation
These procedures work in patients who continue to experience more than 50% relief after diagnostic injections. This may lead to longer periods of pain relief . However, there is a possibility of the regrowth of the nerves and sometimes repeating the procedure may be necessary. Sometimes for upto 3 months after the procedure, the patient may experience increased pain. During this time extra pain killers may be needed and physiotherapy needs to be continued. The chances of permanent long term flare up are less than 1%. Patients may experience long-term numbness, altered sensation and occasionally soreness of the back. Local anaesthetic and steroids are used to help cover post-operative soreness.
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Nerve root injections/ Transforaminal epidurals
We do X Ray guided nerve root injections and transforaminal epidurals for sciatica pain, which often helps to resolve this condition and may help to avoid a spinal surgery.
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Ultrasound guided nerve blocks
Ultrasound guided injections to suprascapular nerves for shoulder pain, occipital nerves for headaches, inguinal nerves for abdominal pain and genicular nerves for knee pain may reduce the sensitivity of the nerves and may lead to short or long-term pain relief. If these diagnostic injection does work but wears off, a pulsed radiofrequency treatment may be offered in suitable patients . These treatments often needs to be combined with Physiotherapy and antineuropathic medicines.
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Trigger point injections
Injections of trigger points with local anaesthetic and steroid may help reduce pain coming from irritated muscles. Injections can calm inflamed muscles. They are not permanent and may in fact cause an increase in pain for a few days before relief, if any. Occasionally injections of local anaesthetic and steroid into the skin can cause changes to the skin itself, leading rarely to fat atrophy.
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Caudal epidurals
These procedures are performed to help reduce leg pain, particularly where there is a strong neuropathic element. Usually a mixture of local anaesthetic and steroid is injected. There is risk of long lasting minor neurological event and minor risk of infection. The risk of events such as significant headaches due to a spinal tap is 1% or less. Normally after such procedures there may be leg heaviness, itching, shivering, fall in blood pressure followed by increase in pain for a day or two. Although these procedures do no tend to give long-term relief some patients derive significant pain relief.
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TENS
Transcutaneous Electrical Nerve Stimulation (TENS) is a non-invasive peripheral stimulation technique which is used for the relief of pain. It is suitable for use by those with chronic pain conditions including low back pain, phantom limb pain and pain arising from osteoarthritis of the joints.
TENS works in three ways: by reducing muscle spasm; by increasing endorphins, the body’s natural pain-relieving chemicals; and by stimulating nerve endings to interrupt pain signals to the brain.
TENS should not be used by patients with epilepsy, pacemakers or by women in the first trimester of pregnancy without specialist advice from a Healthcare Professional.
There are very few side effects to the use of TENS and the units are inexpensive to buy and maintain. TENS does not interfere with drug therapy and the effect is usually rapidly apparent, offering patients increased control over their pain day-to-day with a view to improving function and wellbeing.
Intravenous Regional Blocks
Intravenous regional Blocks are done in an attempt to reduce the sympathetic element of pains. The procedure is performed with a cuff around the affected part and the medicines are injected intravenously. A tourniquet is required to obstruct blood flow during the procedure and the cuff stays up for 20 minutes .The procedure itself can cause pain because of the cuff pressure.
There is often a worsening of pain on injection and for usually only a few days afterwards, although longer periods of pain have been reported. The procedure is often repeated up to 3 times. Some patients notice a marked decrease in pain with a course of blocks.
Patients who suffer from clots and thromboembolic disease should not undergo this procedure. For a few days after the procedure the patient may feel light headed or generally unwell due to the administered medicines. Neurological problems are very rare as the pressures and times of the tourniquet involved are relatively short.
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The use of Steroids in injections
Steroids work by reducing inflammation either in or around joints, or around nerves and can produce a marked relief of symptoms. Although the effects of steroids tend not to last in the long-term, some studies have shown that the use of such drugs may reduce reduce the requirements for certain surgeries. Long-term use of steroids are associated with side effects such as weight gain, hair loss, loss of bone density, headaches, menstrual irregularity, changes in mood and rarely avascular necrosis of the hip, in the Pain Clinic setting such side effects are less frequently seen. This is because the steroids have been given as a single dose and occasionally as a few doses.
Please see sections on common side effects, complications, warnings and medical disclaimer in the bottom of the page
Pulsed Radiofrequency
Pulsed radiofrequency is a technique whereby an electric current is applied to sensitive nerves or nerve endings. Electrical stimulation seems to desensitise the nerves. There may be a few weeks to a month or 2 of increased pain before the relief is experienced. No high temperatures are used and, therefore, the technique itself does not cause any clinical nerve injury as far as per recent research. It can be repeated if necessary. Often local anaesthetic and steroids are injected at the time to help cover the initial post operative soreness.
Please see sections on common side effects, complications, warnings and medical disclaimer in the bottom of the page
Common side effects, complications and warnings
No procedure is without risks. Side effects of any procedure may include infection, bleeding, bruise, failure of the injection to work, pain at the site of injection, increase in pain generally and injury of body structures with the injection procedure.
The use of steroids may lead to temporary headaches and weight gains.
Serious complications such as allergy, anaphylaxis, long term nerve damage or paralysis, abscess are very rare with a probable risk of paralysis or abscess being 1 in 40,000- 50,000.
There is also the possibility of permanant long term flare up of usual pain after procedure, although this is usually less than 1%.
There may be other side effects involved which are beyond the limited capacity of this website.
Medical Disclaimer
The information provided is a simple, general and concise information intended for general public only. This is no substitution for advanced knowledge for medical practitioners. The author takes no responsibilities for inappropriate use of information provided on this website. Please refer to the page on disclaimers for further details. lower back pain spinal stenosis