pH/impedance study

A simple test that helps diagnose reflux conditions.
This scan or test is available at: KIMS Hospital or Sevenoaks Medical Centre - you can request your preferred location when you contact us
Prices & payment Enquiries & appointments

An acid-sensitive catheter is placed in the oesophagus and is attached to a small monitoring device that records changes in oesophageal pH over a period of up to 24 hours. For an impedance study a non-acidic catheter is used instead.

These outpatient studies are used to measure acidic and non-acidic liquids in the oesophagus. They identify both the volume and frequency of reflux episodes, as well as how closely these episodes coincide with your symptoms. By comparing results to established international standards we can identify the presence of reflux disease using objective methods.

A pH study will sometimes be combined with a gastroscopy in a Bravo study.


You can see specialist consultants and have a range of scans and tests at either one of the below facilities. If you need a procedure, this will be carried out at KIMS Hospital in Maidstone.

KIMS Hospital, Maidstone

Find out more about the facilities available at KIMS Hospital.
Sevenoaks Medical Centre Outside

Sevenoaks Medical Centre

Find out more about Sevenoaks Medical Centre, our consulting and diagnostic facility for patients in West Kent.

Prices & payment

pH/Impedance Study
Read more about the self-pay process Read more about the self-pay process
How to use private medical insurance How to use private medical insurance

The above are guide prices only.

Our terms and conditions can be found here.

Three generations

RefluxUK is an independent CQC registered healthcare provider which is working in partnership with KIMS Hospital. Any enquiries made via the KIMS Hospital enquiry line are transferred directly to RefluxUK where an outpatient appointment with a consultant will be arranged by a member of their team. The pre-operative multi-disciplinary team (MDT) assessment is performed by RefluxUK.

Whilst a patient is in the hospital, a consultant who has practising privileges at KIMS Hospital will take responsibility for the patient together with the KIMS Hospital team. Upon discharge, patient care will be transferred back to RefluxUK together with operation notes and the discharge summary.

In the event of any post-operative complication, patient care will continue to be provided by KIMS Hospital until any issues are resolved. Regular meetings between KIMS Hospital and RefluxUK will take place to review the service, quality & governance, and patient feedback.

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