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Updated: Nov 21, 2025
Fast and Accurate Exhaled Breath Ammonia Measurement
Published on: June 11, 2014
A Prospective, Blinded Assessment of Ammonia Testing Demonstrates Low Utility Among Front-Line Clinicians
Juan J Gonzalez1, Elliot B Tapper2
1Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan; Division of Hospital Medicine, University of Michigan, Ann Arbor, Michigan.
Abstract:
Although ammonia is essential to the pathophysiology of hepatic encephalopathy (HE), its levels cannot diagnose HE, do not correlate with the grade of HE, and are plagued by technical challenges.1 Nevertheless, ammonia levels are routinely obtained in the evaluation of hospitalized patients.2 We have advocated for quality improvement to limit testing.3 However, data are lacking regarding the reasons for, context, and perceived value of ammonia testing among ordering clinicians. Additional data are needed to optimize a quality improvement intervention aiming to curb overuse.
Insights
Ammonia testing is common for hepatic encephalopathy (HE) but has limitations. More data is needed on why clinicians order these tests to improve quality and reduce overuse.
Area of Science:
- Hepatology
- Clinical Chemistry
Background:
- Ammonia is crucial in hepatic encephalopathy (HE) pathophysiology.
- Current ammonia testing has diagnostic and technical limitations.
- Routine ammonia level testing persists despite these issues.
Purpose of the Study:
- To investigate the reasons, context, and perceived value of ammonia testing among clinicians ordering the tests.
- To gather data for optimizing quality improvement interventions targeting ammonia test overuse.
Main Methods:
- The abstract does not specify the methods used.
- Further research is needed to determine the methodology.
Main Results:
- The abstract does not specify the results.
- Data on clinician's reasons for ordering ammonia tests are lacking.
Conclusions:
- Additional data on the utility and context of ammonia testing are required.
- Understanding clinician rationale is essential for effective quality improvement initiatives to curb unnecessary testing.
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