Siggaard-Andersen and the "Great Trans-Atlantic Acid-Base Debate"

Area of Science:

• Biochemistry
• Clinical Chemistry
• Medical Diagnostics

Background:

• The introduction of base excess (BE) by Siggaard-Andersen in the late 1950s aimed to quantify non-respiratory acid-base imbalances during blood gas analysis.
• A significant debate, termed the "Great-Transatlantic Acid-Base Debate," emerged between the "Boston" and Copenhagen schools regarding the independence of BE from PCO2.
• The development of standard base excess (SBE) aimed to address concerns about PCO2 dependence, yet the fundamental disagreements persist.

Discussion:

• The ongoing schism between the "Boston" and Copenhagen schools highlights persistent challenges in the interpretation and teaching of acid-base chemistry.
• While standard base excess (SBE) is widely adopted by physicians, some laboratories, particularly those adhering to the "Boston" school's approach, continue to use bicarbonate-based equations.
• Alternative concepts, such as "strong ion difference" (SID), and proposals to replace pH with nanomoles of H+ reflect a desire for a paradigm shift in acid-base analysis.

Key Insights:

• The historical "Great-Transatlantic Acid-Base Debate" continues to influence current practices in acid-base balance assessment.
• Discrepancies in reporting standards (BE vs. bicarbonate equations) contribute to confusion in clinical interpretation and medical education.
• The debate underscores the complexity of acid-base chemistry and the search for universally accepted analytical methods.

Outlook:

• Future efforts should focus on reconciling the differing approaches to acid-base analysis to improve clarity and consistency in clinical practice.
• Further research may explore the clinical utility and educational impact of alternative acid-base concepts like strong ion difference.
• Harmonizing the teaching and reporting of acid-base parameters is crucial for advancing patient care and medical education.