NCLEX Lab Values Practice Flashcards

A comprehensive set of practice flashcards covering essential NCLEX laboratory values, including blood cell counts, electrolytes, kidney/liver function tests, and coagulation studies.

What are the normal range values for Hemoglobin ($Hgb$) in males and females, and what does a low value often indicate?

Male: $14-16.5\,g/dl$, Female: $12-15\,g/dl$. A low value indicates iron deficiency anemia.

What are the normal laboratory ranges for Red blood cells ($RBC$) for males and females?

Male: $4.5-6.2 \%$, Female: $4-5.5 \%$. These cells carry oxygen from the lungs to tissues.

How is Hematocrit defined and what are its normal ranges?

The ratio of the volume of packed red blood cells to total blood volume. Male: $41-51\%$, Female: $36-46\%$. A low value indicates a decrease in $O_2$ capacity.

What is the normal range for White Blood Cells ($WBC$) and how does chemotherapy affect this?

$5,000-10,000\,/uL$ or $mm^3$. Chemotherapy causes this value to decrease.

What is the normal range for Potassium ($K$) and its primary role?

$3.5-5.1\,mEq/L$. It carries an electrical charge important for many cardiac functions.

What is the normal range and function of Sodium ($Na$)?

$135-145\,mEq/L$. It maintains fluid levels, muscle, and nerve functions.

What is the normal laboratory value for Calcium ($Ca$) and why is it important?

$8.6-10\,mEq/L$. It is important in bone and teeth development.

What are the normal ranges for Magnesium ($Mg$) and what is a common medication containing it?

$1.6-2.6\,mEq/L$. An example is Milk of magnesia, which is used as a laxative.

What is the normal range for Chloride ($Cl$) and how is it primarily obtained?

$95-105\,mEq/L$. Most chloride comes from the sodium chloride consumed in the diet.

What is the normal range for Carbon dioxide ($CO_2$) in the body?

$22-32\,mEq/L$.

What does the Blood urea nitrogen ($BUN$) test measure and what is the normal range?

It measures urea, a waste product from protein made in the liver and excreted by the kidneys. Normal range: $8-25\,mg/dL$ (microgram/deciliter).

What is the normal range for Creatinine and what does a high level signal?

$0.6-1.3\,mg/dL$. A high creatinine level signals renal failure.

What are the normal ranges for the liver enzymes AST and ALT, and when do they elevate?

$AST \text{ (or SGOT)}: 10 \text{ to } 40\,IU/L$; $ALT \text{ (Sgpt)}: 5-35\,U/L$. These values elevate with hepatitis or jaundice.

What is the normal range for serum Glucose and where does most sugar originate?

$70-110\,mg/dL$. Most sugar comes from carbohydrates.

What is the normal clotting time for Partial Thromboplastin Time ($PTT$) and how does it change for a client on anticoagulants?

Normally $60-70$ seconds; for those on anticoagulants, it is $1.5 \times 2.5$ times longer ($120 \text{ to } 140$ seconds).

What is Activated partial thromboplastin time ($aPTT$) primarily used to monitor and what are its ranges?

It monitors a client's response to heparin. Normal: $30 \text{ to } 40$ seconds; Anticoagulant use: $60 \text{ to } 80$ seconds ($1.5 \times 2.5$ times longer).

What is the international normalized ratio ($INR$) and its standard range for clients on warfarin?

A test to determine clotting time. Normal is $1-2$. For clients on warfarin, $2.0 \text{ to } 3.0$ is standard.

What is the normal range for Urine specific gravity and what are the collection requirements?

$1.016-1.022$. Requires a $1 \text{ to } 2\,oz.$ sample collected first thing in the morning.

What is the primary function of Platelets and their normal laboratory range?

To prevent bleeding. Normal range: $150,000-400,000\,\mu L$ (microliter).

Lola L. arrives at the ER confused and disoriented. What lab value might raise alarm bells in her case?

If Lola L. has a high Blood Urea Nitrogen (BUN) level, it may indicate dehydration or kidney dysfunction, prompting immediate evaluation of her hydration status and renal function.

In a scenario where Tommy T. presents with a low sodium level, what might be the potential clinical implications?

Low sodium (hyponatremia) can result in confusion, seizures, or altered mental status, which aligns with Tommy T.'s altered presentation in the ER.

When Karen K.’s potassium level comes back at 2.5 mEq/L, what urgent steps should the medical staff take?

A potassium level this low could cause dangerous cardiac dysrhythmias, necessitating immediate intravenous potassium replacement and cardiac monitoring.

What does a hemoglobin level of 10 g/dL suggest regarding Ruby R.'s potential health status and what treatment might be necessary?

A hemoglobin level this low may indicate anemia, leading to symptoms such as fatigue, weakness, or shortness of breath, and may necessitate a blood transfusion.

If Jerry J.'s lab results indicate a high creatinine level, what symptoms should clinicians monitor for in his case?

Elevated creatinine could signify acute kidney injury; important to monitor for symptoms like decreased urine output, swelling, or elevated blood pressure.

In the case of Mia M. with elevated AST at 60 IU/L and ALT at 75 U/L, what does this suggest about her liver function?

Elevated AST and ALT may indicate liver dysfunction, possibly suggesting liver disease or toxicity that requires further monitoring and evaluation.