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Your Anaesthetic

For Shoulder & Elbow Surgery

Anaesthesia stops you feeling pain and other sensations.
It can be given in various ways:

Local anaesthesia involves injections which numb a small part of your body. You stay conscious but free from pain.

Regional anaesthesia involves injections which numb a larger or deeper part of the body.
You stay conscious but free from pain.
The most common regional anaesthetic for Shoulder surgery is an Interscalene Block.

General anaesthesia gives a state of controlled unconsciousness. It is essential for some operations.
You are unconscious and feel nothing.
The most common type of General Anaesthetic we use is know as Total Intravenous Anaesthesia (TIVA). TIVA has the advantages of being very short acting and safe. It is a quick anaesthetic and wears off quickly, with almost no after-effects. So it is ideal for Day Case shoulder and elbow surgery and you should be able to go home less than 6 hours after your operation.

We generally use a combination of a General anaesthetic (TIVA) and a Local anaesthetic or Interscalene block. This ensures the best post-operative pain relief is achieved and you can go home earlier. Sometimes an Interscalene block alone is used if you would prefer to be awake throughout the operation or if a General Anaesthetic is not suitable.

Your anaesthetist will see you before your operation and discuss your anaesthetic with you. Please indicate any preferences and concerns then. If you would like to meet your anaesthetist before the day of your operation please let us know and we can arrange it for you.


Questions to ask your anaesthetist before your operation:

  1. What are your qualifications and general experience?
  2. What is your experience of doing this type of surgery?
  3. How many operations of this type do you carry out each year in the NHS and in the private sector?
  4. What are the complications from the anaesthetic?
  5. What are your rates of complications with this type of surgery?
  6. What do you suggest for pain relief?
For information on our Anaesthetists click here


Download Information Leaflets:

Anaesthesia Explained (pdf)
This leaflet is for adults who are expecting to have an anaesthetic. It offers some information about anaesthesia and suggests how and where you can find out more.

You and your Anaesthetic (pdf)
This leaflet gives basic information to help you prepare for your anaesthetic. It has been written by patients, patient representatives and anaesthetists, working in partnership.

These leaflets and further information can be found at:
www.youranaesthetic.info
 


Interscalene Block

An Interscalene block (ISB) is a nerve block in the neck used to either: 1) provide a heavy numbness in the shoulder and arm (in the same way that a dentist can numb a tooth) so that shoulder surgery can be carried out "awake" or under mild sedation and/ or 2) to provide excellent pain relief for shoulder surgery carried out under general anaesthesia.

The benefits of an interscalene nerve block (ISB) for shoulder surgery are:

  • Reduced risk of nausea and vomiting and sedation
  • Earlier to leave hospital
  • Early intake of food and drink
  • Excellent pain control
  • Lighter general anesthetic with speedier recovery from the anaesthetic
  • Less chance of an overnight stay at the hospital

Block Technique

The Anaesthetist, surgeon and you need to decide jointly whether you are suitable for an ISB.

  • If you have any problems with your diaphragm (muscle used in breathing) on the opposite side of surgery or any weakness or paralysis in the opposite arm to surgery, you may not be suitable for an ISB.
  • Some elderly patients with severe breathing problems may not be suitable for an ISB

You will usually already be under anaesthetic before the ISB is done, although sometimes it is done whilst you are awake.

If you have an ISB performed whilst you are awake, the Anaesthetist may give you some light sedation to help you to relax.

A special needle with a small electric pulse is used to locate the correct nerves. To judge the position of the injection, the anaesthetist looks for muscle twitches in the arm. This is a peculiar sensation but it is completely safe. When the Anaesthetist is happy with the position of the needle, he or she injects some local anaesthetic. The arm and shoulder soon becomes heavy and numb. The anaesthetist will test the numbness of the arm before proceeding further.

Leaving hospital:

PAIN CONTROL

  • The main nerve block technique used in day case surgery is a single injection that lasts 12-24 hours.
  • After leaving the hospital, it is extremely important that you take regular pain killers at the prescribed times from the moment of discharge. This is to avoid unpleasant pain at the time when the nerve block begins to wear off (which can be in the middle of the night). Pain killers are in the form of regular paracetamol and ibuprofen, and codeine if required (if there is no reason why you cannot take these particular pain killers).

MANAGEMENT OF THE "NUMB ARM"

You should carry the "numb" arm in an arm sling until normal sensation and motor function return. You should receive instructions about how to look after the shoulder and arm - it should be protected from heat or pressure injury and extremes of movement. You should take care not be come in contact with extremely hot or cold items because you will not be able to protect yourself from injuries of extremes of temperature.

Side effects of ISB

Most side effects are related to the local anaesthetic spreading and numbing the nerves adjacent to the ones that supply the shoulder and arm. Any or all of the following can occur, but all resolve spontaneously as the effects of the local anaesthetic wear off.

  • Shortness of breath - The injection in the neck can also numb half of the diaphragm (a muscle used in breathing). Some people can feel slightly short of breath, although in most this does not affect greatly the ability to breath adequately.
  • Blurred vision (Horner's syndrome) - 20%.  This is seen as a drooping eyelid and slightly blurred vision on the side of the block and it is usually not a problem. Symptoms pass as the block wears off.
  • Hoarseness - 15%. Due to the nerves supplying the voice box being numbed. This improves as the local anaesthetic wears off.
  • Difficulty swallowing water - 15%. Due to nerves supplying the voice box and throat being numbed. This effect can usually be overcome by "conscious" swallowing and usually it is not a problem.

Complications of ISB

These are the result of the needle being inserted either in the wrong direction or too far. They are both extremely rare and easily dealt with, with little no after effects.

  • Punctured lung (pneumothorax) - Due to the needle piercing the lining of the lung causing it to collapse. If it occurs, admission to hospital while it resolves will be necessary. Very rarely a tube has to be placed into the chest to drain the air. 
  • Seizures and serious long term nerve damage - less than 0.1% risk and reduced by carrying out the nerve block awake.

Fortunately, the serious side effects and complications are uncommon and are lessened by placement of block with use of a nerve stimulator. 




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