{"id":9145,"date":"2024-10-12T04:54:17","date_gmt":"2024-10-12T04:54:17","guid":{"rendered":"https:\/\/www.kauveryhospital.com\/ima-journal\/?p=9145"},"modified":"2025-04-09T10:22:58","modified_gmt":"2025-04-09T10:22:58","slug":"fatal-case-of-methemoglobinemia","status":"publish","type":"post","link":"https:\/\/www.kauveryhospital.com\/ima-journal\/ima-journal-october-2024\/fatal-case-of-methemoglobinemia\/","title":{"rendered":"FATAL CASE OF METHEMOGLOBINEMIA"},"content":{"rendered":"<p class=\"caps\">[vc_row][vc_column][vc_column_text]<\/p>\n<h2><strong>HISTORY<\/strong><\/h2>\n<p style=\"text-align: justify;\">A 49-year-old female brought to ER with h\/o increased lethargy and drowsiness with generalized poor response noted by the attenders since morning with occasional eye opening. Pt was on psychiatric drugs for hallucinations, anxiety, and insomnia with no other proceeding or associated significant symptoms H\/o recent increase in dosage of her psychiatric drugs [t. Cirq plus 10mg (zolpidem tartrate and melatonin), t. sizodon md 0.5 mg (risperidone)] 3 days back. No h\/o fever, cough, vomiting, sob, seizure, chest pain, abdomen pain, bowel and bladder incontinence<\/p>\n<h2><strong>EXAMINATION<\/strong><\/h2>\n<p style=\"text-align: justify;\">On examination pt was afebrile, not tachypneic, Heart rate was 79\/min and BP of 100\/60 mm hg. Her room air saturation was 71% and her GCS were 8\/15 with roving of eye movement seen. On systemic examination her power, sensation was not assessable, hypotonia was noted in all 4 limbs and Reflexes were decreased. Other systemic examination didn\u2019t show any abnormalities<\/p>\n<h2><strong>Investigations:<\/strong><\/h2>\n<p style=\"text-align: justify;\">Initial ABG with 15L Of o2 showed PH \u2013 7.36, pCO2 \u2013 44, pO2 \u2013 299, Na+ &#8211; 135, K+ &#8211; 3.4, Cl \u2013 104, Ca++ &#8211; 1.09, Hct \u2013 33%, Glu \u2013 129, Lac \u2013 3.8, tHb \u2013 10.6, <strong>MetHb \u2013 <\/strong><strong>66.2<\/strong>, Hco3 \u2013 24.9, sO2 \u2013 96.6 %<\/p>\n<p style=\"text-align: justify;\">Despite of 15 l of oxygen supply spo2 was 71% and progressively worsening GCS. Bedside blood sampling was drawn and was dark blue in color, Suspicious of methemoglobinemia<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9147 alignnone\" src=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-1-1.jpg\" alt=\"\" width=\"504\" height=\"236\" srcset=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-1-1.jpg 504w, https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-1-1-300x140.jpg 300w\" sizes=\"auto, (max-width: 504px) 100vw, 504px\" \/><\/p>\n<h2><strong>TREATMENT<\/strong><\/h2>\n<p style=\"text-align: justify;\">Pt was treated with Inj. Methylene blue 1-2 mg\/kg over 5 mins and was started on Inj. Ascorbic acid 1gm in 500 ml ns iv infusion over 4 hrs. In view of low GCS pt was intubated. In the intensive care she underwent Exchange transfusion and continuous renal replacement therapy (CRRT). Her methb dropped from 70% TO 20%, however pt suffered HIE and succumbed to the condition<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9148 alignnone\" src=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-3-1.jpg\" alt=\"\" width=\"703\" height=\"394\" srcset=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-3-1.jpg 703w, https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-3-1-300x168.jpg 300w\" sizes=\"auto, (max-width: 703px) 100vw, 703px\" \/><\/p>\n<h2><strong>PATHOPHYSIOLOGY<\/strong><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-9149\" src=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-2-1.jpg\" alt=\"\" width=\"750\" height=\"250\" srcset=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-2-1.jpg 882w, https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-2-1-300x100.jpg 300w, https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-2-1-768x256.jpg 768w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/>In\u00a0Normal\u00a0situation<\/p>\n<ul>\n<li style=\"text-align: left;\">Redcells\u00a0constantly\u00a0exposed\u00a0to\u00a0oxidant\u00a0stress<\/li>\n<li style=\"text-align: left;\">NADH MetHb reductase keeps oxidative stress in check by reducing MetHb to Fe<sup>2+<\/sup> state<\/li>\n<\/ul>\n<p>Methemoglobinemia\u00a0occurs\u00a0when\u00a0either\u00a0There\u00a0is a\u00a0deficiency\u00a0of\u00a0the\u00a0reducing enzyme (NADH MetHb reductase) Or there is increased oxidative stress that cannot be handled by the body<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-9150\" src=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-5-2.jpg\" alt=\"\" width=\"750\" height=\"264\" srcset=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-5-2.jpg 966w, https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-5-2-300x106.jpg 300w, https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-5-2-768x270.jpg 768w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/p>\n<h2><strong><b>Signs<\/b><\/strong><strong><b>\u00a0<\/b><\/strong><strong><b>&amp; <\/b><\/strong><strong><b>Symptoms<\/b><\/strong><\/h2>\n<ul>\n<li>Low <sub>2<\/sub> saturation that does not respond to supplemental O2\n<ol>\n<li>Key diagnostic feature (sat &lt; 85% w\/o response to 100% FiO<sub>2<\/sub>)<\/li>\n<li>Wavelength averaging by the pulse oximeter causes a falsely low O<sub>2<\/sub> reading<\/li>\n<li>Since there is no true decrease in O<sub>2<\/sub> saturation, there will be no response to 100% FiO<sub>2<\/sub><\/li>\n<\/ol>\n<\/li>\n<li>Severity of symptoms correlates closely to MetHb level and severity of impaired O<sub>2<\/sub> delivery<\/li>\n<li>Symptoms will be worse for any MetHb level in patients with baseline impairment of O<sub>2<\/sub> delivery (i.e. CHF, pneumonia, COPD, anemia)<\/li>\n<\/ul>\n<h2><strong><b>Complications:<\/b><\/strong><\/h2>\n<ul>\n<li>Central nervous system depression: Symptoms include extreme drowsiness, slurred speech, and slow reflexes.<\/li>\n<li>Seizures: A sign of seizures is loss of consciousness or uncontrollable jerking motions.<\/li>\n<li>Metabolic acidosis: Signs include rapid breathing, increased heart rate, and confusion.<\/li>\n<li>Organ damage: If left untreated, methemoglobinemia can damage the heart, lungs, liver, and other organs.<\/li>\n<li>Death: In rare cases, severe methemoglobinemia can be life-threatening, especially if not treated promptly.<\/li>\n<\/ul>\n<h2><strong><b>Management<\/b><\/strong><\/h2>\n<ul>\n<li>Source identification, removal (if possible) and decontamination<\/li>\n<li>Basic Supportive Care\n<ul>\n<li>Provide 100% FiO<sub>2<\/sub>\u00a0\u2013\u00a0<strong>lack<\/strong><strong>\u00a0<\/strong><strong>of<\/strong><strong>\u00a0<\/strong><strong>response<\/strong><strong>\u00a0<\/strong><strong>should<\/strong><strong>\u00a0<\/strong><strong>raise<\/strong><strong>\u00a0<\/strong><strong>suspicion<\/strong><strong>\u00a0<\/strong><strong>of <\/strong><strong>methemoglobinemia<\/strong><\/li>\n<\/ul>\n<\/li>\n<li>Diagnostic Testing<\/li>\n<li>Arterial blood gas , will reveal a normal PaO<sub>2<\/sub><\/li>\n<\/ul>\n<p>Administer\u00a0Methylene\u00a0Blue\u00a01-2\u00a0mg\/kg\u00a0IV<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-9156\" src=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-6-2.jpg\" alt=\"\" width=\"750\" height=\"490\" srcset=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-6-2.jpg 1082w, https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-6-2-300x196.jpg 300w, https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-6-2-1024x669.jpg 1024w, https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-6-2-768x502.jpg 768w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/p>\n<ul>\n<li>Exchange transfusion can be used to treat methemoglobinemia when other treatments are\u00a0\u00a0Automated exchange transfusions may be more effective than manual ones<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-9157\" src=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-7-1.jpg\" alt=\"\" width=\"750\" height=\"253\" srcset=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-7-1.jpg 852w, https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-7-1-300x101.jpg 300w, https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/img-4-7-1-768x259.jpg 768w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/p>\n<h2><strong>References<\/strong><\/h2>\n<ul>\n<li>Benz EJ, Ebert BL. Hemoglobin variants associated with hemolytic anemia, altered oxygen affinity, and\u00a0\u00a0In: Hoffman R, Benz EJ, Silberstein LE, eds. <em>Hematology: Basic Principles and Practice<\/em>. 7th ed. Philadelphia, PA: Elsevier; 2018:chap 43.<\/li>\n<li>Letterio J, Pateva I, Petrosiute A, Ahuja\u00a0\u00a0Hematologic and oncologic problems in the fetus and neonate. In: Martin RJ, Fanaroff AA, Walsh MC, eds. <em>Fanaroff and Martin&#8217;s Neonatal-Perinatal Medicine<\/em>. 11th ed. Philadelphia, PA: Elsevier; 2020:chap 79.<\/li>\n<li>Means RT. Approach to the anemias. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 26th ed. Philadelphia, PA: Elsevier; 2020:chap 149<\/li>\n<li>Wolak E, Byerly FL, Mason T, Cairns\u00a0\u00a0Methemoglobinemia in critically ill burned patients. Am J Crit Care. 2005 Mar;14(2):104-8 [<u>PubMed<\/u>]<\/li>\n<li>Reeves DJ, Saum LM, Birhiray\u00a0\u00a0I.V. ascorbic acid for treatment of apparent rasburicase-induced methemoglobinemia in a patient with acute kidney injury and assumed glucose-6-phosphate dehydrogenase deficiency. Am J Health Syst Pharm. 2016 May 1;73(9):e238-42. doi: 10.2146\/ajhp150591<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><strong><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-9210\" src=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/abishwin-150x150.jpeg\" alt=\"\" width=\"150\" height=\"150\" srcset=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/abishwin-150x150.jpeg 150w, https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/abishwin-300x300.jpeg 300w, https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/abishwin.jpeg 600w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/>Dr. Abishwin<\/strong><br \/>\nMEM \/ MRCEM Resident &#8211; Emergency Medicine<br \/>\nKauvery Hospital, Chennai<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-9199 size-thumbnail\" src=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/Dr.Vidya_-150x150.jpg\" alt=\"\" width=\"150\" height=\"150\" \/>Dr. Vidya Saketharaman<\/strong><br \/>\nConsultant -Emergency Medicine<br \/>\nKauvery Hospital, Chennai<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-9200 size-thumbnail\" src=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2024\/10\/Dr_Ashok-150x150.jpg\" alt=\"\" width=\"150\" height=\"150\" \/>Dr. Ashok N<\/strong><br \/>\nConsultant and Clinical lead &#8211; Department of Emergency Medicine<br \/>\nKauvery Hospital, Chennai[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[vc_row][vc_column][vc_column_text] HISTORY A 49-year-old female brought to ER with h\/o increased lethargy and drowsiness with generalized poor response noted by the attenders since morning with occasional eye opening. Pt was<\/p>\n","protected":false},"author":2,"featured_media":9146,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[80],"tags":[],"class_list":["post-9145","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ima-journal-october-2024"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>FATAL CASE OF METHEMOGLOBINEMIA<\/title>\n<meta name=\"description\" content=\"A 49-year female brought to ER with h\/o increased lethargy and drowsiness with generalized poorresponse noted by the attenders since morning with occasional eye opening.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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