Fred, a 68 y/o male who had an MI in April, 2015was seen by his physicianon Aug.
ID: 3484000 • Letter: F
Question
Fred, a 68 y/o male who had an MI in April, 2015was seen by his physicianon Aug. 30, 2017 presenting with shortness of breath, fatigability, and swelling of the lower extremities. Upon physical examination, the man was found to have distended jugulars and pitting edema of the ankles. His breathing was rapid (20 breaths/min) and pulmonarycrackles were heard bilaterally in the lower lobes of the lungs. He had a pulse rate of 110 beats/min and a BP of 152/98. Since his MI, he was taking digoxin and hydrochlorothiazide. At the time, the Px blood and urine work showed:
Blood
Values
Urine
Values
Na+ (mEq/L)
128
Na+ (mEq/L)
110
K+ (mEq/L)
3.9
K+ (mEq/L)
80
Mg2+ (mg/dL)
1.7
Mg2+ (mg/day)
19
Ca2+ (mg/dL)
8.9
Ca2+ (mg/day)
105
HCO3 (mEq/L)
30
HCO3
1.7
Creatinine (mg/dl)
1.7
Creatinine (mg/L)
2080
PAH (mg/ml)
0.013
PAH (mg/ml)
5.91
Glucose (mg/dL)
85
Glucose
0
BUN (mg/dL)
14
24hr volume (L)
1.2
pCO2 (mmHg)
45
Osmolarity (mOsm/L)
750
pH
7.31
pH
6.8
The Px was admitted at that time andwas treated with 2L of 5% saline and Lasix® which removed the excess blood volume. The Px’s blood pressure, heart rate and respiratory problems were reduced. Additional lab tests indicated that the Px was experiencing left ventricular failure. Once he was stable, the Px was sent homeon Sept. 2.
On Dec. 7, 2017, the Px was transported to the ER via ambulance after his daughter found him unresponsive. She told the ER physician that her father had been extremely fatigued at any level of effort, had extensive flank pain and that his mental alertness had decreased significantly over the past two weeks. Physical examination finds that the Px is doesn’t respond to questioning and appears to fall asleep during the examination. Once again, the Px exhibits excessive swelling in the lower extremities with distended jugulars. His heart rate is now 92 and irregular, his BP is 164/110. His breathing is 28 breaths/min and shallow but lung sounds are normal. His urine is dark and foamy. The ends of his fingers and toes have a bluish appearance and his abdomen is large and distended. Blood and urine values are:
Blood
Values
Urine
Values
Na+ (mEq/L)
118
Na+ (mEq/L)
310
K+ (mEq/L)
2.9
K+ (mEq/L)
108
Mg2+ (mg/dL)
0.7
Mg2+ (mg/day)
29
Ca2+ (mg/dL)
5.9
Ca2+ (mg/day)
155
HCO3 (mEq/L)
29
HCO3
13.9
Creatinine (mg/dl)
2.2
Creatinine (mg/L)
1590
PAH (mg/ml)
0.013
PAH (mg/ml)
5.91
Glucose (mg/dL)
85
Glucose
0
pCO2 (mmHg)
53
Osmolarity (mOsm/L)
400
pO2 (mmHg)
67
24hr urine volume (mL)
600
pH
7.28
pH
6.8
RBC count / µL
3.8 x 106
Hemoglobin gm/dl
9.5
1) Following admission, the renal clinic examined the Px and determined that thePx was in Stage 4 chronic kidney disease (CKD). What Px data provided above support this diagnosis? What caused this renal failure? ( calculations, cell and tissue mechanisms here)
Blood
Values
Urine
Values
Na+ (mEq/L)
128
Na+ (mEq/L)
110
K+ (mEq/L)
3.9
K+ (mEq/L)
80
Mg2+ (mg/dL)
1.7
Mg2+ (mg/day)
19
Ca2+ (mg/dL)
8.9
Ca2+ (mg/day)
105
HCO3 (mEq/L)
30
HCO3
1.7
Creatinine (mg/dl)
1.7
Creatinine (mg/L)
2080
PAH (mg/ml)
0.013
PAH (mg/ml)
5.91
Glucose (mg/dL)
85
Glucose
0
BUN (mg/dL)
14
24hr volume (L)
1.2
pCO2 (mmHg)
45
Osmolarity (mOsm/L)
750
pH
7.31
pH
6.8
Explanation / Answer
Chronic renal failure is a slow and progressive loss of renal function that occurs over a period of several years. Chronic renal failure is not easy to diagnose as even if one kidney stops functioning, the other can carry out normal functions. It is thus usually detected when the disease has reached advanced stage.
The patient had Myocardial infarction and the hypertension might be associated to it or with the renal failure. The laboratory tests that are helpful in determining renal condition include Blood Tests and Urine tests.
The blood tests include:-
Serum Creatinine- Creatinine is a waste product that comes from the normal wear and tear on muscles of the body. Creatinine levels in the blood can vary depending on age, race and body size. Normal levels of creatinine in the blood are approximately 0.6 to 1.2 mg/dL in adult males and 0.5 to 1.1 mg/dL in adult females. The level of creatinine in the blood rises, as kidney failure progresses.
The blood creatinine level of the patient on 30th Aug 2017 was 1.7 mg/dl. It rose to 2.2 mg/dl upto December 2017. The level of serum creatinine higher than normal indicates impaired functioning of kidneys.
Electrolytes:- The levels of electrolytes are balanced in the Aug 2017 tests, whereas the electrolyte imbalance is observed in Dec 2017 tests. A variety of electrolyte and acid-base derangements predictably occur with progressive loss of renal function.
Thus the chronic renal failure was diagnosed from the tests.
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