Kidney Stones Treatment Part 1
Small stones
Most kidney stones will be small enough to be passed in your
urine, and it may be possible to treat these at home. For stones up
to 4mm (0.2in) in diameter, eight out of ten people will be able to
pass them in their urine.
However, small kidney stones may still cause pain. The pain from
smaller kidney stones usually lasts a couple of days and disappears
when the stone has been passed.
Medication
If you have severe pain, your GP may inject you with a painkiller.
A second dose can be given after half an hour if you are still
experiencing pain.
Medication can also be injected to treat the symptoms of nausea
(feeling sick) and vomiting. This is called an anti-emetic
(anti-sickness) medication.
You may also be given a prescription
for painkillers, anti-emetics or both, to take at home.
Self care
If you are sent home to wait for your kidney stone to pass, you
may be advised to try to collect the stone from your urine. You can
do this by filtering your urine through gauze or a stocking. The
stone can be given to your GP to help them determine any further
treatment you may need.
You should drink enough water to make your urine colourless. If
your urine is yellow or brown you are not drinking enough.
Large stones
If a kidney stone is too big to be passed naturally, you may need
to have treatment to remove it another way. If your stone is 6-7mm
(0.3in) in diameter, or larger, you may require treatment. This
could include:
These procedures are explained in more detail below. The type of
treatment you have will depend on the size and location of your
stones.
Extracorporeal shock wave lithotripsy (ESWL)
ESWL is the most common
way of treating kidney stones that cannot be passed in the urine.
ESWL involves using X-rays (high-energy radiation) or ultrasound
(high-frequency sound waves) to pin-point where a kidney stone is. A
machine then sends shock waves of energy to the stone to break it
into smaller pieces so it can be passed in your urine.
ESWL can be an uncomfortable form of treatment, so it is usually
performed under a local anaesthetic (painkilling medication).
You may need more than one session of ESWL in order to treat your
kidney stones successfully. For stones that are up to 20mm (0.8in) in
diameter, ESWL is up to 99% effective.
Percutaneous nephrolithotomy (PCNL)
PCNL is an alternative procedure
that may be used for larger stones. It may also be used if ESWL
is not suitable, for example, because the person being treated is
obese.
PCNL involves using a thin telescopic instrument that is called a
nephroscope. An incision (cut) that leads to your kidney is made in
your back. The nephroscope is passed through the incision and into
your kidney. The stone is either pulled out, or broken into smaller
pieces using a laser or ESWL.
PCNL is often performed under general anaesthetic, which means
that you should not drive or operate machinery for up to 48 hours
after the procedure.
As PCNL is a type of surgical procedure, it does carry more risks
than ESWL. For stones that are 21-30mm (0.8-1.2in) in diameter, PCNL
is 86% effective.
Ureterorenoscopy
If a kidney stone is stuck in your ureter (the muscular tube that
carries waste products from your kidneys to your bladder), you may
need to have ureterorenoscopy. Ureterorenoscopy is also sometimes
known as retrograde intrarenal surgery (RIRS).
Ureterorenoscopy involves passing a long, thin telescope, called a
ureteroscope, through your urethra (the tube that carries urine from
the bladder to the outside of the body), into your bladder. It is
then passed up into your ureter to where the stone is stuck.
The surgeon may either try gently to remove the stone using
another instrument, or they may use lasers, or ESWL, to break the
stone up into small pieces so that it can be passed naturally in your
urine.
As with PCNL, ureterorenoscopy is also performed under general
anaesthetic, so you should not drive or operate machinery for up
to 48 hours after the procedure.
For stones up to 15mm (0.6in), an ureterorenoscopy is effective in
50-80% of cases.
Surgery
If none of the methods for removing your kidney stone that are
described above are suitable, it may be necessary to remove it using
traditional surgery. This will involve making an incision (cut) in
your back in order to gain access to both your ureter and your
kidney. The kidney stone can then be removed.
This kind of surgery is only necessary in around 5% of cases.
Uric acid stones
If you have a uric acid stone, you may be advised to drink around
three litres of water each day to try to dissolve it. Uric acid
stones are much softer than other types of kidney stone, and they can
be made smaller if they are exposed to alkaline fluids.
You may need to take some medication to make your urine more
alkaline before the uric acid stone starts to dissolve.