Normal anion gap metabolic acidosis abg interpretation. Interpretation of blood gas data should follow a logical pattern. If the results do not make sense, either your interpretation was wrong or there may be some additional processes at work that were not recognized on the initial analysis. A metaanalysis has helped establish the strong correlation of. Summary of the patients clinical condition when the abg was. Download arterial blood gas interpretation pdf download. Determine the cause of the acidosis or alkalosis by looking at the pco2 and hco3if ph correct and quick responses j anesth crit care j anesth crit care open access 55. Woodruff, msn, rnbc, cns, cmsrn, cen 6 easy steps to. Interpretation of the arterial blood gas selflearning packet see swift for list of qualifying boards for continuing education hours. An observational study using blood gas analysis to assess neonatal. Weve recently released a new free quiz platform, which includes these scenarios and over 2000 other free mcqs. We have created three arterial blood gas analysis slidesets.
A brief lesson on abg interpretation and the associated ventilator settings changes. Continuous regular abg monitoring and recording for trends. What i found was a somewhat mixed bag, in terms of current opinions regarding whether routine abgs are appropriate in healthy neonates. Determine the cause of the acidosis or alkalosis by looking at the pco2 and hco3if ph abg upon arterial blood gas abg interpretation analysis, you could come to know, 1 oxygenation of blood through gas exchange in the lungs.
Objectives abg sampling interpretation of abg oxygenation status acid base status case scenarios 3. Each hemoglobin molecule contains four atoms of iron and therefore can combine with four molecules of oxygen. Download abg analysis kami adalah komuniti perkongsian. Potential for use in neonatal testing at the point of care. Interpreting an abg is a crucial skill for health care professionals, and it is especially important in critically ill patients. The cause of the acidosis is the p a co 2, which is the respiratory component of the abg results. The effect of environment diarrhea or diarrheafree on the 11 blood gas.
Analyze the ph the first step in analyzing abgs is to look at the ph. Then evaluate the respiratory parameter paco 2 and the metabolic parameter hco 3 to determine if the acidemia or alkalemia is respiratory or metabolic in origin. This test is commonly performed in the icu and er setting. Initially evaluate the ph to determine if an acidemia or alkalemia is present. Document the time and date that the abg was performed as this may be significantly different than the time you are documenting. An overview of a 20 video course on understanding the arterial blood gas abg, followed by a brief introduction to the topic. As pao2 increases, more oxygen diffuses into the red blood cells, where it combines with hemoglobin to form oxyhemoglobin. You will see abgs like this in older preemies with severe bpd. Blood gas interpretation in the neonate what do you need to know. Application of modified henderson equation in abg interpretation. Ventilator settings in pressure control mode with simulated term neonatal values. Interpretation of the arterial blood gas selflearning packet. Abg interpretation debbie sander pasii what is an abg what is an abg.
All these problems in the abg challenge are included in oakes abg instructional guide free within this website to show how the answers were derived. Download arterial blood gas interpretation pdf list price. These presentations provides a introduction to arterial blood gas procedures, abgs interpretation and 15 practice cases. Neonatal nurse practitioner the ronald mcdonald childrens hospital at loyola university medical center objectives at the end of this lecture, the participant will be able to. If both the pco2 and hco3 are abnormal, the one which deviates most from the norm is most likely causing an.
Abg interpretation when interpreting the abg results, one must first know the five major components of the abg to be addressed. A new approach to abg interpretation article nursingcenter. This analyzer should not substitute for clinical context. Neonatal calf diarrhea is the most common cause of mortality in calves torsein et al. Abou mehrem, md assistant consultant king abdulaziz hospital slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.
May 11, 2012 a lecture on the differential diagnosis of a normal anion gap metabolic acidosis, focusing on renal tubular acidosis, but also covering diarrhea, saline infu. Dec 30, 2012 objectives abg sampling interpretation of abg oxygenation status acid base status case scenarios 3. Abg procedure and precautions site ideally radial artery brachial artery femoral artery ideally preheparinised abg syringes syringe should be flushed with 0. Blood gas interpretation in the neonate what do you need to.
With that in mind, the main steps in interpreting an arterial blood gas in greater detail are presented below. If both the pco2 and hco3 are abnormal, the one which deviates most from the norm is most likely causing an abnormal ph. In addition, provided is a list of commonly encountered acidbase disorders. If you need a refresher on abg interpretation then make sure to check out our guide. This article provides a collection of different abg interpretation scenarios for you to work through.
Before making an interpretation of an abg it is always ofwise to check for the consistency of the report bicarbonateby the modified henderson equation. How to document abg results in the notes geeky medics. This had been preceded by 30 minutes of severe central chest pain. Over 50 sample problems are discussed in detail in the guide. A free powerpoint ppt presentation displayed as a flash slide show on id.
Arterial blood gas abg interpretation for medical students, osces and mrcp paces this section presents how to interpret arterial blood gases. Understanding compensatory mechanisms will help you to determine the causes of acidbase imbalance. This is a chronic respiratory acidosis with metabolic compensation. It explains each component in turn followed by clinical examples to work through. Because the ph is abnormal, you know compensation is not complete. Abg interpretation 1 free download as powerpoint presentation.
This guide will focus on a commonly used sevenstep process, which helps ensure a complete interpretation of every abg. The abg instructional guide begins with the basics and stepbystep advances to more complex double and triple disorders. Abg interpretation steps to abg interpretation step 1. When one thinks of abg analysis, oxygenation may come to mind first. A 16 yo male presents to the er, obtunded, and rapid, shallow breathing, with progressive weakness over the last month. Putting the picture together, you note the high hco3 and be.
Arterial blood gases abg can be difficult and confusing to understand at first. Pdf arterial blood gas analysis is a common investigation in emergency departments and intensive care units for. Interpretation of the blood gas by healthcare personnel is a critical step in the. The process of analysis and monitoring of arterial blood gas abg is an essential part of diagnosing and managing the oxygenation status and acidbase balance of the. That makes the interpretation of these abg results is uncompensated respiratory acidosis. Arterial blood gas abg interpretation for medical students. While the analyzer can often help with analysis, the history of the patient is critical for accurate interpretation. Arterial blood gas analysis workshop page 6 of 8 arterial blood gas analysis workshop scenario 3 initial information a 75 year old woman is admitted to the accident and emergency department following a vf cardiac arrest, which was witnessed by the paramedics. Abg analysis can also determine blood acidity ph level. The most important points when assessing a patient are the history, examination and basic observations.
Abg interpretation 1 bicarbonate respiratory system. However, the more complicated and in some ways more important part of abg analysis is ph regulation. Document the abg results and your interpretation of them see our guide to interpreting an abg here. An abg is the most accurate representation of a patients clinical status and correct interpretation can lead to quicker and more accurate changes in the. Be able to interpret simple arterial blood gas analyses in the context of cardiac arrest or impending cardiac arrest have a systematic approach to arterial blood gas interpretation. Arterial blood gas analysis workshop page 1 of 8 arterial blood gas analysis workshop key teaching objectives by the end of the session, the candidate will. These abg values reveal metabolic acidosis with partial compensation. Apr 03, 2020 an abg is a blood test that measures the acidity, or ph, and the levels of oxygen o2 and carbon dioxide co2 from an artery.
Interpretation of the case this is a raised anion gap metabolic acidosis, with respiratory compensation and a large osmolar gap. Ppt abg interpretation powerpoint presentation free to. Possible dialysis to remove excess lactate, manipulation of ventilation settings to adjust co 2 levels, but always maintaining tissue perfusion. Arterial blood for blood gas analysis is usually drawn by a respiratory therapist and. His paco2 is lower than normal, reflecting the lungs attempt to compensate. The ph is mildly low, but certainly not as low as you would expect with a pco2 of 68. Interpreting an abg is a crucial skill for health care professionals, and it is especially important in critically ill patients this guide will focus on a commonly used sevenstep process, which helps ensure a complete interpretation of every abg in addition, provided is a list of commonly encountered acidbase disorders many guides exist to aid the interpretation of the abg, some may. Juretschke, phd, rncnpt, apnnnpbc, ccns founderpresident, nicu solutions, inc. Sodium and chloride are required for anion gap calculation. An arterialblood gas abg test measures the amounts of arterial gases, such as oxygen and. Arterial blood gas analysis for emergency medicine registrars. Arterial blood gas primer clinical respiratory diseases. In addition, the exact values accepted as normal may vary from institution to institution.
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