Reference no: EM133949245

Question

ABG Worksheet

For each case study determine the acid/base imbalance

1. 60 yo male presents to the ED from a nursing home. You have no history other than he has been breathing rapidly and is less responsive than usual.

pH 7.31

PaCO2 10 mmHg

HCO3- 5 mEq/l

PaO2 85 mmHg

SaO2 85%

2. 42 yo female has the flu for four days with incessant vomiting. She presents to the ED two days after stopping insulin due to no food intake

pH 7.21

PaCO2 25 mmHg

HCO3- 10 mEq/l

PaO2 90 mmHg

SaO2 95%

3. 30 year old female BMT patient with neutropenic fever has been receiving multiple antibiotics including amphotericin B. You are called to the bedside for her fevers, rigors, and dyspnea

pH 7.07

PaCO2 28 mmHg

HCO3- 8 mEq/l

PaO2 75 mmHg

SaO2 80%

4. An elderly woman from a nursing home was transferred to hospital because of profound weakness and areflexia. Her oral intake had been poor for a few days. Current medication was a sleeping tablet which was administered by nursing staff as needed.

pH 7.58

PaCO2 49 mmHg

HCO3- 44.4 mEq/l

PaO2 81 mmHg

SaO2 86%

5. A 19 year old pregnant insulin dependent diabetic patient was admitted with a history of polyuria and thirst. She now felt ill and presented to hospital. There was a history of poor compliance with medical therapy.

pH 7.26

PaCO2 16 mmHg

HCO3- 7.1 mEql/l

PaO2 87 mmHg

SaO2 88%

6. A 70 year old man was admitted with severe congestive cardiac failure. He has been unwell for about a week and has been vomiting for the previous 5 days. He was on no medication. He was hyperventilating and was very distressed. Admission biochemistry is listed below. He was on high concentration oxygen by mask.

pH 7.58

PaCO2 21 mmHg

HCO3- 19 mEq/l

PaO2 85mmHg

SaO2 80%

7. A 60 year old woman was admitted with lobar pneumonia. She was on a thiazide diuretic for 9 months following a previous admission with congestive cardiac failure. The admission arterial blood results were:

pH 7.64

PaCO2 36 mmHg

HCO3- 33 mEq/l

PaO2 82 mmHg

SaO2 92%

8. A 44 year old moderately dehydrated man was admitted with a two day history of acute severe diarrhea.

pH 7.31

PaCO2 33 mmHg

HCO3- 16 mEq/l

PaO2 90 mmHg

SaO2 96%

9. A 55 year old insulin dependent diabetic woman was brought to Casualty by ambulance. She was semi-comatose and had been ill for several days. Past history of left ventricular failure. Current medication was digoxin and a thiazide diuretic.

pH 7.31

PaCO2 32 mmHg

HCO3- 19 mEq/l

PaO2 75 mmHg

SaO2 81%

10. A 69 year old patient had a cardiac arrest soon after return to the ward following an operation. Resuscitation was commenced and included intubation and ventilation. Femoral arterial blood gases were collected about five minutes after the arrest.

pH 6.85

PaCO2 82 mmHg

HCO3- 25 mEq/l

PaO2 96 mmHg

SaO2 84%