The oxyhemoglobin dissociation curve in liver cirrhosis

Thierry Clerbaux1, Bruno Detry1, Andre Geubel2

  • 1Department of Internal Medicine, Divisions of Pneumology, Cliniques Universitaires Saint-Luc Brussels, Brussels, Belgium.

Chest
|February 16, 2006
PubMed

Insights

Cirrhotic patients show increased dispersion in oxygen saturation, indicating altered hemoglobin-oxygen binding. This may be influenced by factors beyond standard blood gas parameters.

Area of Science:

  • Cardiology
  • Hepatology
  • Pulmonology

Background:

  • Cirrhosis affects oxygen transport.
  • Orthotopic liver transplantation (OLT) candidates require precise physiological assessment.

Purpose of the Study:

  • To characterize the oxyhemoglobin dissociation curve (ODC) in stable cirrhotic patients awaiting OLT.
  • To identify factors influencing ODC in this population.

Main Methods:

  • Prospective cohort study comparing 50 cirrhotic patients with 50 healthy controls.
  • Whole blood ODC tracing under standard conditions.
  • Measurement of 2,3-diphosphoglycerate (2,3 DPG), plasma ions, and arterial blood gases.

Main Results:

  • Mean ODC was similar between groups.
  • Cirrhotic patients exhibited significantly greater dispersion of PO2 values for given oxygen saturation levels (SO2%).
  • P50 in cirrhotic patients was influenced by chloride, inorganic phosphate, and 2,3 DPG, but not by sodium, potassium, or calcium.

Conclusions:

  • Increased ODC dispersion in cirrhosis may stem from altered enzymes, hypothyroidism, medications (diuretics, propranolol), or plasma ion disturbances.
  • ODC characterization should include shape, position, and dispersion; factors beyond standard parameters influence ODC position.
Abstract

Related Concept Videos

Oxygen Transport in the Blood01:27

Oxygen Transport in the Blood

Hemoglobin (Hb) is a crucial molecule in the human body, consisting of four polypeptide chains, each bound to an iron-containing heme group. This unique structure enables hemoglobin to bind to oxygen, with each molecule capable of combining with four molecules of oxygen, leading to rapid and reversible oxygen loading. When fully loaded with oxygen, it is called oxyhemoglobin, while hemoglobin that has released oxygen is called reduced hemoglobin or deoxyhemoglobin. As hemoglobin binds oxygen,...
Effect of Hepatic Disease on Pharmacokinetics: Drug Dosing and Hepatic Blood Flow01:26

Effect of Hepatic Disease on Pharmacokinetics: Drug Dosing and Hepatic Blood Flow

Chronic liver disease significantly impacts drug metabolism due to alterations in hepatic blood flow and enzyme accessibility. This disruption affects the body's pharmacokinetics—the movement and processing of drugs within the system. Key enzymes crucial for metabolizing medications become less accessible, changing how drugs are processed and utilized. Furthermore, liver disease influences the synthesis of plasma proteins, such as albumin and globulins, which play critical roles in drug binding...
Cirrhosis II: Pathophysiology01:24

Cirrhosis II: Pathophysiology

Cirrhosis is a progressive chronic liver injury caused by prolonged inflammation, excessive fibrotic remodeling, and impaired regeneration. Over time, repeated hepatic insults disrupt the liver’s architecture and function, leading to reduced blood flow, impaired bile drainage, and diminished metabolic capacity.Pathophysiology of cirrhosisCirrhosis arises from three main responses to chronic liver damage: inflammation, immune activation, and hepatocyte death. These processes lead to structural...
Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test01:22

Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test

In clinical practice, the direct measurement of hepatic blood flow to evaluate liver function presents significant challenges due to the intricate and specialized nature of the necessary techniques. Consequently, healthcare professionals often rely on empirical estimates derived from thorough patient examinations and liver function tests to gauge liver health. Among the tools at their disposal, the Child–Pugh and MELD scoring systems stand out for their ability to categorize and assess the...
Hemoglobin01:24

Hemoglobin

Hemoglobin is a globular protein made up of four subunits. Two of these subunits are alpha chains, and the other two are beta chains. Each subunit contains a molecule of heme, which has an iron atom and can bind to oxygen. When an oxygen molecule binds to one heme group, it changes the shape of hemoglobin, making it easier for the other heme groups to bind oxygen as well.
When all four heme groups are bound to oxygen, the resulting molecule is called oxyhemoglobin. As a result, arterial blood...
Cirrhosis I: Introduction01:23

Cirrhosis I: Introduction

Cirrhosis is a chronic, irreversible liver disease characterized by the widespread replacement of healthy liver tissue with fibrotic scar tissue and the formation of regenerative nodules.Etiology of cirrhosisCirrhosis results from sustained liver injury that triggers progressive fibrosis and structural remodeling. The underlying causes are diverse, encompassing common and less frequent clinical conditions. Regardless of the origin, all causes lead to chronic inflammation, hepatocyte loss, and...