The nurse is caring for a client whose arterial blood gas reveals fully compensated metabolic acidosis. Which results are consistent with this finding?

Table 9.9 Normal Arterial Blood Gas Values

ABG Value.                                                             Normal Value

pH                                                                             7.35-7.45

PaCO2                                                                                                            35-45 mmHg

HCO3-                                                                         22-26mEq/L

Base excess                                                               -2 to +2

PaO2                                                                            80-95 mmHg

SaO2                                                                            >95%

pH 7.36, Pa02 98 mmHg, PaCO2 27 mmHg, HCO3 16 mEq/L, 02 sat 99%

pH 7.47, Pa02 91 mmHg, PaCO2 52 mmHg. HCO3 30 mEg/L, 02 sat 96%

pH 7.45, P302 86 mmHg, PaCO2 56 mmHg, HCO3 28 mEg/L, 02 sat 94%

PH 7.32, PaO2 88 mmHg. PaCO2 54 mmHg. HCO3 29 mEq/L. 02 sat 94%

Answer and Explanation

The Correct Answer is A

A. pH 7.36, PaO2 98 mmHg, PaCO2 27 mmHg, HCO3 16 mEq/L, O2 sat 99%: This set of ABG results is consistent with fully compensated metabolic acidosis. pH 7.36: This is within the normal range (7.35-7.45), indicating that compensation has occurred, as the pH has returned to normal levels. PaCO2 27 mmHg: The PaCO2 is low, suggesting that the respiratory system has compensated for the metabolic acidosis by increasing ventilation to excrete CO2, thus reducing the acid load. HCO3 16 mEq/L: The bicarbonate level is low, which is consistent with metabolic acidosis as the primary disturbance. The PaO2 and O2 saturation are normal, indicating adequate oxygenation. Since the pH is within the normal range and the PaCO2 and HCO3 levels reflect the compensatory changes needed to correct the metabolic acidosis, this is a case of fully compensated metabolic acidosis.

B. pH 7.47, PaO2 91 mmHg, PaCO2 52 mmHg, HCO3 30 mEq/L, O2 sat 96%:

This result indicates alkalosis rather than acidosis. The pH is alkalotic (7.47), and PaCO2 is elevated (52 mmHg), which suggests respiratory acidosis as the primary disturbance. The HCO3 is also high (30 mEq/L), which is consistent with metabolic compensation for respiratory acidosis, not for metabolic acidosis. Therefore, this is not consistent with fully compensated metabolic acidosis.

C. pH 7.45, PaO2 86 mmHg, PaCO2 56 mmHg, HCO3 28 mEq/L, O2 sat 94%:

The pH is normal, but PaCO2 is elevated (56 mmHg), indicating respiratory acidosis rather than metabolic acidosis. The HCO3 is also elevated (28 mEq/L), which is consistent with compensation for respiratory acidosis, not metabolic acidosis. This result suggests respiratory acidosis with compensated metabolic alkalosis rather than metabolic acidosis.

D. pH 7.32, PaO2 88 mmHg, PaCO2 54 mmHg, HCO3 29 mEq/L, O2 sat 94%:

The pH of 7.32 indicates acidosis, but it is not within the normal range, so this is not fully compensated. The PaCO2 is elevated (54 mmHg), indicating respiratory acidosis, and the HCO3 is elevated (29 mEq/L), showing metabolic compensation. However, since the pH has not yet returned to normal (it remains acidotic), this is an example of partially compensated respiratory acidosis, not fully compensated metabolic acidosis.

respiratory acidosis, not fully compensated metabolic acidosis.

Nursing Test Bank

Test Bank #1: RN Pharmacology Exams Test Bank #2: RN Medical-Surgical Exams Test Bank #3: RN Fundamentals Exams Test Bank #4: RN Maternal-Newborn Exams Test Bank #5: RN Anatomy and Physiology Exams Test Bank #6: RN Obstetrics and Pediatrics Exams Test Bank #7: RN Fluid and Electrolytes Exams Test Bank #9: RN Adult Health Test Bank #10: RN Dosage Calculation Test Bank #11: RN Community Health Exams Test Bank #12: RN Psychology Exams Test Bank #13: RN Nursing Care Of Children Test Bank #14: RN Foundations of Nursing Exams

Get 100+ Naxlex Exit Exams for $79 Try Naxlex NCLEX-RN (14 Day Free-Trial)

Naxlex Comprehensive Predictor Exams

Exam #1: RN Comprehensive predictor 2023 proctored exam Exam #2: Ati rn vati comprehensive predictor proctored exam Exam #3: Ati Rn Comprehensive Predictor Proctored Exam 2023 Exam #4: Rn Comprehensive Predictor 2023 Proctored Exam - St. Joseph Exam #5: RN Comprehensive Predictor Proctored Exam (National U CA San Diego) Exam #6: Ati rn comprehensive predictor 2023 retake proctored exam Exam #7: RN Hesi Exit Proctored Exam Exam #8: Hesi RN Exit proctored exam Exam #9: Hesi rn exit proctored exam Exam #10: Hesi Rn compass exit B proctored exam

Free Nursing Study Resources

Correct Answer is ["A","C","D","E"]

Explanation

A. "How long have you had the pain?"
Asking about the duration of the pain is crucial in assessing a myocardial infarction (MI). The length of time the pain has been occurring can help the nurse determine if the pain is acute or has been ongoing. For instance, chest pain lasting more than 20 minutes or worsening in intensity could indicate an MI. Knowing the timing of the pain also helps establish whether it may be related to acute coronary syndrome (ACS), which requires immediate intervention.

B. "Do you have a history of coronary artery disease?"
While it’s important to understand the patient’s medical history, this question is more secondary during the initial assessment of a client with chest pain. This information is valuable for understanding the risk of cardiovascular events, but it is not the immediate focus when assessing the current pain. The nurse should prioritize questions that address the current symptoms and the characteristics of the pain first.

C. "How would you describe your pain?"
This question is essential to help differentiate the chest pain associated with a myocardial infarction from other causes, such as musculoskeletal pain or gastrointestinal issues. MI pain is typically described as a crushing, pressure-like, or squeezing sensation. Identifying the quality of the pain helps establish whether it’s consistent with a cardiac event. Understanding the description of the pain also provides information about the intensity and potential for myocardial damage.

D. "What were you doing when the pain began?"
This is an important question because activity-related chest pain can help determine the potential cause of the pain. Pain associated with physical exertion or emotional stress may point to an MI or angina. On the other hand, pain unrelated to activity might suggest other causes such as gastrointestinal issues or musculoskeletal pain. Inquiring about the onset of the pain can also provide insight into whether it is associated with physical strain or acute coronary syndrome.

E. "Can you rate your pain on a 0-10 scale?"
Pain assessment using a numeric pain scale (0-10) helps the nurse gauge the severity of the pain and track changes over time. It’s important for determining whether the pain is severe enough to be consistent with an acute myocardial infarction or if it might resolve on its own. This information is vital in deciding the urgency of interventions and treatment decisions.

A. Partially compensated metabolic alkalosis B. Partially compensated respiratory acidosis C. Fully compensated metabolic alkalosis D. Fully compensated respiratory acidosis

Correct Answer is B

Explanation

A. Partially compensated metabolic alkalosis:
Metabolic alkalosis is characterized by elevated bicarbonate levels (HCO3), but in this case, the HCO3 is elevated (29 mEq/L), which suggests alkalosis. However, the PaCO2 is elevated at 47 mmHg, which is more consistent with a respiratory problem. A fully or partially compensated metabolic alkalosis would show a normal or low PaCO2 (due to respiratory compensation). Therefore, this option does not fit the ABG results.

B. Partially compensated respiratory acidosis: In this case, the pH is 7.17, which is low and indicates acidosis. The PaCO2 is 47 mmHg, which is elevated (normal range: 35-45 mmHg), indicating that the respiratory system is contributing to the acidosis. The HCO3 is 29 mEq/L, which is elevated (normal range: 22-26 mEq/L), suggesting a compensatory response from the kidneys to retain bicarbonate in an attempt to buffer the acidosis. Since the pH is still below normal and has not yet returned to the normal range (7.35-7.45), this suggests that the compensation is partial and the primary issue is respiratory acidosis.

C. Fully compensated metabolic alkalosis:
This answer is incorrect because metabolic alkalosis is not the primary disturbance here. Also, for a condition to be fully compensated, the pH would need to be within the normal range (7.35-7.45). Since the pH is 7.17, the condition is not fully compensated.

D. Fully compensated respiratory acidosis:
For fully compensated respiratory acidosis, the pH should be within the normal range, as the kidneys would have fully compensated for the elevated PaCO2. Since the pH is 7.17, this is a sign of partial compensation, not full compensation. Therefore, this option is incorrect.

View Question and Answer

Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.

Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today

Arterial Blood Gases
pH	7.35-7.45
PaCO2	35-45mmHg
PaO2	80-100mmHg
HCO3-	22-26 mEq/L
O2 Saturation	>95%
Chemistry
BUN	8-21mg/dl
Creatinine	0.5-1.2mg/dl
Na	135-145 mEq/L
K	3.5-5.3 mEq/L
Cl	97-107 mEq/L
CO2	22-26 mEq/L
Ca	8.2-10.2 mg/dl
Glucose	65-99 mg/dl
Mg	1.7-2.2 mg/dl
PO4	2.5-4.5 mg/dl

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A client comes to the emergency Department with chest pain and the nurse suspects a myocardial infarction. Which questions) should the nurse ask the client about the pain in the initial assessment? (SELECT ALL THAT APPLY)

Correct Answer is ["A","C","D","E"]

Explanation

Correct Answer is B

Explanation

Which nursing intervention is the highest priority for the client who has had an acute anterior wall myocardial infarction?

A patient is prescribed 500 ml of Normal Saline to be infused over 90 minutes. The drop factor on the tubing is 10 gtt/mL. At what rate should the nurse regulate the IV (gtt/min)? (Round to the nearest whole number)

The nurse is caring for a client with acute respiratory failure who has been placed on bi-level positive airway pressure (BIPAP) for adequate ventilation. The client complains of nausea and begins to vomit. The priority nursing intervention would be:

The client tells the nurse, "My physician told me that I had a non-ST elevation myocardial infarction (NSTEMI). " I thought all heart attacks were the same. Can you explain this to me?" The nurse's best response to the client's question would be: "NSTEMI is

The nurse is to begin a nitroglycerin infusion for a client diagnosed with an anterior wall myocardial infarction. Which assessment finding should the nurse report to the provider immediately?

To achieve the outcome of effective ventilation, which nursing intervention should be included in the plan of care for a client on a ventilator?