PH And Motility

Question 1

What is the purpose of a 24 hour ambulatory pH and impedance monitoring?

Answer 1

Evaluate the efficacy of medication or surgery. 
Used to document endoscopy results 
  - Weak acid reflux.
  - Non-acid reflux.
  - Excessive acid.

Question 2

What method is used to carry out an ambulatory PH and impedance monitoring?

Answer 2

Trans-nasally position a thin pH probe 5cm above LES (lower oesophageal sphincter)
Document: 
  - Sleep patterns 
  - Diet 
  - Meals

Question 3

Name 3 techniques used to carry out an ambulatory pH and impedance monitoring

Answer 3

• Single sensor catheter
  
  • Dual sensor catheter
  • Wireless Ph Capsule

Question 4

What is the DeMeester score and how does it indicate reflux?

Answer 4

A score higher than 14.72 indicates reflux

Question 5

What are the indications of a positive ambulatory pH and impedance monitor test?

Answer 5

• A PH of less than 4 for 3.5% of the 24h recordings

- Correlation of symptoms with abnormal acid exposure

Question 6

What are the indications of Non-acid reflux on an ambulatory pH and impedance monitor test?

Answer 6

A pH greater than 4

Good correlation of symptoms with refluxate