As discussed on this page, a nerve block (or regional anaesthesia) is a technique which involves the injection of local anaesthetic (a drug) around nerves in your body. This medication numbs your nerves and blocks pain signals from travelling for around 12-18 hours. Dr Maghami will advise you if you need a nerve block and will discuss the below information with you as well.
Nerve blocks will cause some transient muscle weakness
Nerve blocks will usually cause some degree of muscle weakness and loss of sensation in the affected limb. This is because nerves carry messages for both sensation/pain and movement. There may also be other side effects depending on the specific nerve block done - for example with nerve blocks in your shoulder you may have a mild shortness of breath, hoarse voice or drooping of the face on the same side as the block. This is because other nerves may travel near the nerves we are targeting and be affected as well. These are common side effects and will go away once the nerve block wears off. If you have severe or prolonged shortness of breath or any other very concerning symptoms, please call an ambulance
How long do nerve blocks take to wear off?
Although most nerve blocks last between 12-18 hours, some can last up to 36 hours depending on the block type and medications used. As the nerve block wears off, your affected body part will become less heavy and numb and then some discomfort may start as it is wearing off.
What about pain relief?
It is important you take pain medications as soon as the discomfort starts - don't wait until it is unbearable. Usually pain medications take an hour to work from the time you ingest it so keep that in mind. Don't take more than you need because some pain medications have side effects such as sedation, constipation and reduced breathing rate. Paracetamol and anti-inflammatories (if not contra-indicated) are good first line pain medications and are not sedating.
How do I take care of my limb while I have the nerve block?
While the nerve block is working, your affected limb will be numb and insensate. This means you won't know if you're lying on it for too long, if you knock it against something, or if you pour very hot liquid on it. For this reason, try to avoid pressure on one area on your limb for too long. If a large part of your body is numb, a sling or crutches will be provided for you to use until the nerve block has worn off.
I have other questions
If it is before your operation, Dr Maghami will always call you either in the days before your operation or see you on the day of the operation. However if you have pressing questions feel free to call his rooms and ask for him to give you a call to discuss them.
If you’re an inpatient, ask the staff to call him, they or you can then talk to him.
If you are post-procedure call Dr Maghami’s rooms and ask for him to give you a call to discuss them. Your GP may also seperately be able to discuss some of your concerns. However if it is an emergency call an ambulance
Contact Dr Maghami if the nerve block lasts longer than 48 hours or if you have ongoing muscle weakness lasting longer than the time frames above or if there is anything else unexpected.