{"id":141270,"date":"2024-09-20T15:05:14","date_gmt":"2024-09-20T15:05:14","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=141270"},"modified":"2024-09-20T15:05:31","modified_gmt":"2024-09-20T15:05:31","slug":"a-patients-arterial-blood-gas-abg-values-include-a-ph-of-7-48-a-paco2-of-38-and-an-hco3-of-30","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2024\/09\/20\/a-patients-arterial-blood-gas-abg-values-include-a-ph-of-7-48-a-paco2-of-38-and-an-hco3-of-30\/","title":{"rendered":"A patient’s arterial blood gas (ABG) values include a pH of 7.48, a PaCO2 of 38, and an HCO3- of 30."},"content":{"rendered":"\n

A patient’s arterial blood gas (ABG) values include a pH of 7.48, a PaCO2 of 38, and an HCO3- of 30. Around which acid-base imbalance would the nurse plan the patient’s care?
A.
Metabolic acidosis.<\/p>\n\n\n\n

B.
Metabolic alkalosis.<\/p>\n\n\n\n

C.
Respiratory acidosis.<\/p>\n\n\n\n

D.
Respiratory alkalosis.<\/p>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

The correct answer is B. Metabolic alkalosis<\/strong>.<\/p>\n\n\n\n

Explanation:<\/h3>\n\n\n\n

The arterial blood gas (ABG) values provided are as follows:<\/p>\n\n\n\n

    \n
  • pH<\/strong>: 7.48 (slightly alkaline)<\/li>\n\n\n\n
  • PaCO2<\/strong>: 38 mmHg (within normal range of 35-45 mmHg)<\/li>\n\n\n\n
  • HCO3-<\/strong>: 30 mEq\/L (elevated, normal range is 22-26 mEq\/L)<\/li>\n<\/ul>\n\n\n\n

    These ABG results indicate that the patient is experiencing metabolic alkalosis<\/strong>, which is characterized by an elevated pH (greater than 7.45) and an increase in bicarbonate (HCO3-) levels. Let’s break down the values and reasoning:<\/p>\n\n\n\n

      \n
    1. pH of 7.48<\/strong>: This value shows that the patient’s blood is more alkaline than normal. The normal range of pH is 7.35 to 7.45. A pH above 7.45 suggests alkalosis, which could be either respiratory or metabolic in origin.<\/li>\n\n\n\n
    2. PaCO2 of 38 mmHg<\/strong>: The partial pressure of carbon dioxide (PaCO2) is within the normal range (35-45 mmHg), which indicates that the respiratory system is not the primary cause of the alkalosis. If respiratory dysfunction were involved, we would expect a deviation in PaCO2. Since the PaCO2 is normal, the respiratory system is likely compensating or unaffected.<\/li>\n\n\n\n
    3. HCO3- of 30 mEq\/L<\/strong>: The bicarbonate level is elevated (normal range is 22-26 mEq\/L). An increase in bicarbonate is a hallmark of metabolic alkalosis<\/strong>. Bicarbonate is a base, and when its levels are elevated, it leads to an alkalotic state in the blood.<\/li>\n<\/ol>\n\n\n\n

      In this case, the imbalance is not due to respiratory dysfunction because the PaCO2 is normal. The primary issue is an increase in HCO3-, which points to a metabolic origin<\/strong>. The kidneys may be retaining bicarbonate, or there may be a loss of acid from the body due to factors such as prolonged vomiting, diuretic use, or excessive intake of alkaline substances like antacids.<\/p>\n\n\n\n

      Other options explained:<\/h3>\n\n\n\n
        \n
      • Metabolic acidosis<\/strong> (Option A) would involve a low pH (below 7.35) and low HCO3-, which does not match the current ABG values.<\/li>\n\n\n\n
      • Respiratory acidosis<\/strong> (Option C) would show a low pH with elevated PaCO2, indicating hypoventilation, which is not the case here.<\/li>\n\n\n\n
      • Respiratory alkalosis<\/strong> (Option D) would show an elevated pH but would also have a low PaCO2 (due to hyperventilation), which is not present here.<\/li>\n<\/ul>\n\n\n\n

        Thus, the ABG results indicate metabolic alkalosis<\/strong>, and care should be planned accordingly.<\/p>\n","protected":false},"excerpt":{"rendered":"

        A patient’s arterial blood gas (ABG) values include a pH of 7.48, a PaCO2 of 38, and an HCO3- of 30. Around which acid-base imbalance would the nurse plan the patient’s care?A.Metabolic acidosis. B.Metabolic alkalosis. C.Respiratory acidosis. D.Respiratory alkalosis. The Correct Answer and Explanation is: The correct answer is B. Metabolic alkalosis. Explanation: The arterial […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-141270","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/141270","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=141270"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/141270\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=141270"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=141270"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=141270"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}