Blood Gas #21

Posted Leave a commentPosted in ed, education

Describe and interpret this venous blood gas: History: A 37-year-old woman with a history of non-insulin dependent diabetes mellitus, alcohol dependence, and recurrent depressive episodes is found unconscious at home. On arrival to the emergency department she remains comatose (GCS 3), hypotensive (BP 90/60), and tachycardic (HR 106 beats/minute, sinus). Her initial VBG is as follows: pH 6.72 Na 138 mmol/L pCO2 48 mmHg K […]

Blood Gas #20

Posted Leave a commentPosted in ed, education

Describe and interpret this arterial blood gas: History: A 62-year-old man presenting with chest pain and dyspnoea. He has a cardiac history and is peripherally oedematous. pH 7.50 Na 122 mmol/L pCO2 13 mmHg K 4.8 mmol/L pO2 68 mmHg (FiO2 0.21) Cl 101 mmol/L HCO3 10 mmol/L Glucose 20 mmol/L Albumin 27 g/L Lactate 6.1 mmol/L Urinary Na <10 mmol/L Urea […]

Blood Gas #19

Posted Leave a commentPosted in ed, education

Describe and interpret this arterial blood gas: History: A 78-year-old woman presents 7 hours after ingestion of 2.4 g SR verapamil, 40 mg trandolapril and 8.4 g metformin. The patient is alert, with a systolic blood pressure of 60 mmHg. pH 7.15 Na 142 mmol/L pCO2 26 mmHg K 3.6 mmol/L pO2 110 mmHg (FiO2 0.21) Cl 119 mmol/L HCO3 9 mmol/L Glucose 9.7 […]

Blood Gas #18

Posted Leave a commentPosted in ed, education

Describe and interpret this arterial blood gas: History: A 50-year-old man with systemic sclerosis and altered bowel habit presents with dyspnoea and hypotension. pH 7.18 Na 141 mmol/L pCO2 48 mmHg K 1.5 mmol/L pO2 74.7 mmHg (FiO2 0.8) Cl 110 mmol/L HCO3 17.3 mmol/L  Glucose 7.7 mmol/L Lactate 4.3 mmol/L [expand title=”Interpretation”]   What is the pH? 7.18 = acidaemia What […]

Blood Gas #17

Posted Leave a commentPosted in ed, education

Describe and interpret this venous blood gas: History: A 40-year-old man with history of alcohol misuse, abdominal pain and vomiting. He has recently commenced metformin. pH 7.51 Na 132 mmol/L pCO2 18 mmHg K 4.2 mmol/L HCO3 12 mmol/L Cl 88 mmol/L Lactate 5 mmol/L Glucose 20 mmol/L [expand title=”Interpretation”]   What is the pH? 7.51 = alkalaemia What is the primary […]

Blood Gas #16

Posted Leave a commentPosted in ed, education

Describe and interpret this arterial blood gas: History: A 41-year-old man presents unconscious with pinpoint pupils. Paramedics have administered naloxone with a partial response, however his GCS remains 8 on arrival to the emergency department. His arterial blood gas is as follows. pH 7.02 Na 140 mmol/L pCO2 105 mmHg K 3.2 mmol/L pO2 33 mmHg (FiO2 0.6) Cl 108 mmol/L […]

Blood Gas #15

Posted Leave a commentPosted in ed, education

Describe and interpret these blood gases: History: 38-year-old woman post-PEA cardiac arrest, intubated and ventilated. History of major depression and alcoholic liver disease. Venous blood gas on arrival to the ED: pH 7.33 Na 116 mmol/L pCO2 30 mmHg K 2.3 mmol/L pO2 308 mmHg (FiO2 1.0) Ca 0.88 mmol/L HCO3 16 mmol/L Cl 61 mmol/L  Albumin 26 g/L Glucose 9.0 mmol/L Hb 104 g/L […]