Arterial Blood Gases Made Easy by Iain A.M. HennesseyArterial blood gas analysis plays an indispensable role in the assessment and management of patients with a huge range of acute medical and surgical problems. Its importance as a key tool in the work-up of acutely unwell patients rivals that of the ECG and the chest x-ray. This book covers all aspects of the arterial blood gas in a simple, user-friendly manner. The first part explains the technique, the values obtained and common patterns of abnormalities, while the second part comprises a series of worked examples and case scenarios to allow the reader to put this system into practice.
How to Master ABG's (Arterial Blood Gasses)
Arterial blood gas analysis is used to measure the pH and the partial pressures of oxygen and carbon dioxide in arterial blood. The investigation is relatively easy to perform and yields information that can guide the management of acute and chronic illnesses. This information indicates a patient's acid-base balance, the effectiveness of their gas exchange and the state of their ventilatory control. Interpretation of an arterial blood gas result should not be done without considering the clinical findings. The results change as the body compensates for the underlying problem.
Blood gases are helpful to determine the adequacy of respiratory function oxygenation and ventilation as well as the baby's acid-base balance. Arterial specimens are required to assess pO2. It is always important to note the FiO2 percentage inspired oxygen when interpreting blood gases. Thus a decrease in pH from 7. While a pH range of 7. If the respiratory acidosis is chronic, the body will respond by trying to excrete acid and retain bicarbonate in the urine resulting in a compensatory rise in serum bicarbonate. This will lead to a compensated respiratory acidosis with an elevated base excess.
If partial pressure of carbon dioxide pCO2 goes down, partial pressure of oxygen pO2 should go up. Mistakes in arterial blood gas ABG interpretation are common in clinical practice.
Interpreting an arterial blood gas ABG is a crucial skill for physicians, nurses, respiratory therapists, and other health care personnel. ABG interpretation is especially important in critically ill patients. The following six-step process helps ensure a complete interpretation of every ABG. In addition, you will find tables that list commonly encountered acid-base disorders. Many methods exist to guide the interpretation of the ABG. A summary of these techniques can be found in some of the suggested articles.
Arterial blood gas analysis is often perceived as one of the most difficult topics to be covered in the laboratory medicine curriculum, so many will welcome the promise contained in the title of this book, albeit with a degree of skepticism. They will not be disappointed. This excellent pocket-sized handbook, which can be read at one sitting, is an object lesson in clarity. This really is arterial blood gases made easy. The book is divided into two equal sections. The first covers basic physiology and concepts required for interpretation of blood gas results under four headings: gas exchange in the lungs, disturbance of gas exchange, normal acid-base balance, and the four classes of acid-base disturbance. This first section also covers arterial blood collection technique and includes two flow charts for interpretation of blood gas results.