Question 1

What is the expected range for a healthy patient’s SpO2?

Accepted Answer

Answer reason: Values below about 95% are more suggestive of impaired oxygenation, ventilation-perfusion mismatch, or measurement artifact and warrant clinical correlation. A lower range such as 90–100% includes values that are commonly treated as abnormal in otherwise healthy individuals. A narrower range like 98–100% is too restrictive because many healthy people have baseline saturations of 95–97%.

Question 2

A female client has a serum calcium level of 7.2 mg/dl. During the physical examination, nurse Noah expects to assess?

Accepted Answer

Answer reason: A low serum calcium indicates hypocalcemia, which increases neuromuscular excitability and can produce tetany. This manifests on exam as carpopedal spasm when a blood pressure cuff is inflated, which is the classic elicited finding. Homans’ sign is associated with possible DVT, while Hegar’s and Goodell’s signs are early pregnancy findings involving softening of the uterus/cervix. Therefore the expected assessment finding with calcium 7.2 mg/dL is the tetany-related sign.

Question 3

Normal adult pulse?

Accepted Answer

Answer reason: Values below 60 can represent bradycardia (though may be normal in well-trained athletes), so it is not the standard reference range for the general adult population. Ranges starting at 80 or 100 shift toward higher rates and would miss normal lower resting values. Therefore the best single range for a normal adult pulse is 60–100 bpm.

Question 4

Microscopic hematuria is detected by?

Accepted Answer

Answer reason: Microscopic hematuria is defined by red blood cells in urine that are not visible to the naked eye, so it requires laboratory detection rather than observation. Microscopy of urinary sediment (often after a positive dipstick) directly visualizes and/or quantifies RBCs per high-power field, which is the diagnostic basis for “microscopic” hematuria. Visual inspection only detects gross hematuria, where urine appears pink/red or tea-colored. CT scan or X-ray may help identify causes (e.g., stones, tumors) but they do not detect the presence of microscopic blood in the urine sample itself.

Question 5

A child with a poor nutritional status and weight loss is at risk for a negative nitrogen balance. To help diagnose this problem, the nurse in charge anticipates that the doctor will order which laboratory test?

Accepted Answer

Answer reason: Measuring total protein (and related markers like albumin/prealbumin) supports identifying protein-calorie malnutrition and inadequate intake/absorption contributing to weight loss. Hemoglobin and total iron-binding capacity primarily evaluate anemia/iron status rather than whole-body nitrogen/protein balance. Serum transferrin is influenced by nutrition but is also tightly linked to iron transport, making it less direct than an overall protein measure for this specific question.

Question 6

A 55-year-old man undergoes endoscopy for evaluation of chronic gastric pain. Gastric antral biopsy demonstrates gastritis but no ulcerative lesions. H. pylori organisms are seen with special stains on the biopsy fragments. The patient is treated with an appropriate course of omeprazole plus clarithromycin and metronidazole. Which of the following is the most appropriate noninvasive test to determine whether the H. pylori has been eradicated?

Accepted Answer

Answer reason: The urea breath test identifies ongoing urease activity from living organisms and is therefore appropriate to confirm cure after therapy. Serologic IgA/IgG testing can remain positive for months to years after treatment and cannot reliably document eradication. Culture of biopsy and rapid urease testing require endoscopy/biopsy, so they are not noninvasive and are unnecessary for routine test-of-cure.

Question 7

Lee Angela’s lab test just revealed that her chloride level is 96 mEq/L. As a nurse, you would interpret this serum chloride level as?

Accepted Answer

Answer reason: A value of 96 mEq/L is at the low end of, or just minimally below, many reference intervals and is generally considered clinically acceptable when not accompanied by symptoms or acid–base abnormalities. Markedly abnormal chloride values are most concerning when they parallel significant metabolic acidosis/alkalosis or major fluid losses/shifts. Given the provided choices, the best interpretation is that the level is not meaningfully abnormal. A common distractor is labeling it “Low,” which would be more appropriate with clearer hypochloremia below the usual lower limit and supportive clinical context.

Question 8

Normal bilirubin levels in physiological jaundice—?

Accepted Answer

Answer reason: In typical physiologic jaundice, total serum bilirubin rises modestly and remains in a range that is generally below levels associated with acute bilirubin neurotoxicity in term infants. Values above this range (e.g., >12–20 mg/dL depending on age in hours and risk factors) prompt evaluation for pathologic causes such as hemolysis, infection, or metabolic disease. Very high levels (often approaching or exceeding 20 mg/dL) substantially increase the risk of kernicterus and require urgent management.

Question 9

If urine electrophoresis, that helps to detect the presence of...?

Accepted Answer

Answer reason: In plasma cell dyscrasias (e.g., multiple myeloma), free kappa or lambda light chains are filtered and appear in urine as a monoclonal band, historically referred to as Bence-Jones protein. Ketones and glucose are typically identified by urine dipstick chemistry, not electrophoretic separation. Hemoglobin in urine is assessed with dipstick and microscopy/confirmatory tests rather than being the primary target of urine electrophoresis.

Question 10

Which test checks cholesterol levels?

Accepted Answer

Answer reason: This test typically reports total cholesterol, LDL-C, HDL-C, and triglycerides, allowing interpretation of atherogenic risk and guiding lifestyle or statin therapy decisions. CBC evaluates blood cell lines (RBCs, WBCs, platelets) rather than fats in the blood. LFT and RFT assess liver and kidney function respectively and do not directly measure cholesterol levels.

Question 11

Breast cancer screening test —?

Accepted Answer

Answer reason: Mammography is the standard population-level screening modality for breast cancer because it can detect non-palpable masses and microcalcifications before clinical symptoms appear. The other options assess different organ systems (ECG for cardiac electrical activity, spirometry for pulmonary function, EEG for brain electrical activity) and do not screen for breast malignancy. Therefore, this is the most appropriate screening test listed for breast cancer.

Question 12

A nurse is caring for a patient with hypercholesterolemia. During patient teaching the nurse should state the expected range for total cholesterol is -?

Accepted Answer

Answer reason: This value is used in screening and risk stratification for atherosclerotic cardiovascular disease and is the key patient-teaching benchmark for “normal” total cholesterol. The

Question 13

Normal bleeding time is?

Accepted Answer

Answer reason: The commonly taught normal range for bleeding time is approximately a few minutes, typically cited as about 2 to 7 minutes depending on the method used. Values longer than this suggest impaired platelet function (e.g., aspirin effect, uremia) or von Willebrand disease rather than coagulation factor deficiencies. Ranges like 8–12 or 15–20 minutes are more consistent with abnormal prolongation and would warrant evaluation for platelet-related disorders.

Question 14

Year-old male patient presents with altered mental status, dry mucous membranes, and a serum sodium level of 155 mEq/L. As a registered nurse, Ms Alina suspects which electrolyte imbalance?

Accepted Answer

Answer reason: The accompanying dry mucous membranes point to free-water deficit/dehydration, a classic driver of hypernatremia due to increased serum osmolality. Neurologic changes such as altered mental status occur because hyperosmolar states pull water out of brain cells, causing cellular dehydration. Potassium disorders (hypo/hyperkalemia) more typically present with neuromuscular weakness and dysrhythmias rather than a primary rise in serum sodium, and hyponatremia would require a low sodium value.

Question 15

Which of the following markers is the first to appear in hepatitis B infection?

Accepted Answer

Answer reason: HBsAg appears first after infection and indicates current HBV infection (acute or chronic) and potential infectivity. Anti-HBc (IgM) rises shortly after HBsAg and is most useful for identifying acute infection and the window period. Anti-HBs appears later only after recovery or successful vaccination, and anti-HBc (IgG) reflects prior exposure or chronic infection rather than the earliest phase.

Question 16

Normal fasting blood sugar ?

Accepted Answer

Answer reason: Values below this range suggest hypoglycemia risk and are not considered normal for fasting screening. Higher ranges such as 120–200 mg/dL exceed normal and align more with impaired fasting glucose/diabetes thresholds depending on the exact value and confirmatory testing. Very high fasting values (e.g., >200 mg/dL) are strongly abnormal and warrant evaluation for diabetes and acute metabolic decompensation if symptomatic.

Question 17

A nurse is caring for a patient with renal irregularities. The patient's urinalysis results indicate a urine specific gravity of 1.225. How will the patients urine be affected?

Accepted Answer

Answer reason: A value of 1.225 is markedly above the typical adult reference range (about 1.005–1.030), indicating very concentrated urine. This is consistent with states of reduced free water excretion (e.g., dehydration or elevated ADH effect), where the kidneys conserve water and excrete a smaller, more solute-dense volume. Dilute urine would instead correspond to a low specific gravity closer to 1.001–1.005. Therefore the expected effect is concentrated urine.

Question 18

Complaining of chest pain that began 4 hours ago. A troponin T blood specimen is obtained, and the results indicate a level of 0.6 ng/mL. The nurse determines that this result indicates which finding?

Accepted Answer

Answer reason: A value of 0.6 ng/mL is above typical reference cutoffs (often

Question 19

Which of the following arterial blood gas (ABG) values indicates uncompensated metabolic alkalosis?

Accepted Answer

Answer reason: Metabolic alkalosis is defined by an alkalemic pH with a primary elevation in bicarbonate. Uncompensated means the respiratory component (PaCO2) remains within the normal range rather than rising to counter the alkalosis. Here, pH is high (7.48) and HCO3 is elevated (30), while PaCO2 is normal (42), matching an uncompensated metabolic alkalosis pattern. By contrast, an elevated PaCO2 would suggest respiratory compensation rather than no compensation.

Question 20

A 24-year-old female is admitted to the ER for confusion. She has a history of myeloma diagnosis, constipation, severe abdominal pain, and polyuria. Which of the following conditions is most likely?

Accepted Answer

Answer reason: Elevated calcium produces neurocognitive changes (e.g., confusion), GI hypomotility with constipation and abdominal pain, and renal concentrating defects leading to polyuria and dehydration. This symptom cluster is classic for hypercalcemia and is more coherent than primary GI disorders like IBS or localized infection such as diverticulitis. Hypokalemia can cause weakness and arrhythmias but does not typically explain the combined triad of constipation, polyuria, and confusion in the setting of myeloma.

Question 21

Which of the following is not used to assess kidney function?

Accepted Answer

Answer reason: Creatinine, BUN, and cystatin C are used to estimate or correlate with GFR and renal excretory performance, so they are appropriate renal function indicators. Alanine aminotransferase is a hepatocellular enzyme primarily used to evaluate liver injury, not renal filtration. A common confusion is assuming any blood chemistry reflects kidney status, but organ-specific enzymes like this one are not renal function tests.

Question 22

Nurse Bennett is monitoring a client with Guillain-Barré syndrome who has developed respiratory acidosis due to reduced alveolar ventilation. To confirm the diagnosis of respiratory acidosis, Nurse Bennett reviews the client’s arterial blood gas (ABG) results. Which combination of ABG values confirms respiratory acidosis?

Accepted Answer

Answer reason: Respiratory acidosis is defined by acidemia (pH < 7.35) caused primarily by hypoventilation with CO2 retention (PaCO2 > 45 mm Hg). Reduced alveolar ventilation in neuromuscular weakness leads to inadequate CO2 elimination, so the key confirming pattern is low pH with elevated PaCO2. This pair represents an uncompensated/partially compensated primary respiratory acidosis pattern. By contrast, normal pH with normal PaCO2 reflects normal acid-base status rather than respiratory failure.

Question 23

A cigarette vendor was brought to the emergency department of a hospital after she fell into the ground and hurt her left leg. She is noted to be tachycardic and tachypneic. Painkillers were carried out to lessen her pain. Suddenly, she started complaining that she is still in pain and now experiencing muscle cramps, tingling, and paraesthesia. Measurement of arterial blood gas reveals pH 7.6, PaO2 120 mm Hg, PaCO2 31 mm Hg, and HCO3 25 mmol/L. What does this mean?

Accepted Answer

Answer reason: The primary driver is the low PaCO2 (31 mm Hg), indicating excessive CO2 blow-off from hyperventilation, which fits a primary respiratory alkalosis (often due to pain/anxiety). The bicarbonate is normal (HCO3 25 mmol/L), showing no metabolic compensation has occurred yet, so it is uncompensated. The neuromuscular symptoms (tingling, paresthesias, cramps) are consistent with acute respiratory alkalosis causing decreased ionized calcium and increased neuronal excitability.

Question 24

A male client with type 1 diabetes mellitus has a highly elevated glycosylated hemoglobin (Hb) test result. In discussing the result with the client, nurse Sharmaine would be most accurate in stating?

Accepted Answer

Answer reason:  Glycosylated hemoglobin (HbA1c) reflects average blood glucose over the lifespan of red blood cells, so it estimates long-term glycemic control over roughly 2–3 months. This makes it the most accurate interpretation to share when a result is highly elevated. Fasting is required for fasting plasma glucose, not for HbA1c testing. While poor diet or a need to change insulin could contribute, the lab value alone cannot pinpoint a single behavioral cause or justify a specific medication change without broader assessment and trends.

Question 25

Client Z is admitted to the hospital and is to undergo brain surgery. The client is very anxious and scared of the upcoming surgery. He begins to hyperventilate and becomes very dizzy. The client loses consciousness and the STAT ABGs reveal pH 7.61, PaCO2 22 mmHg, and HCO3 25 mEq/L. What is the ABG interpretation based on the findings?

Accepted Answer

Answer reason: The HCO3 of 25 mEq/L is within normal range, showing there is no renal (metabolic) compensation yet. In acute respiratory alkalosis, kidneys have not had time to lower bicarbonate, so the pattern remains uncompensated. A “partially compensated” choice would require an abnormal bicarbonate in the compensatory direction, which is not present here.

Question 26

Mr. Wales, who underwent post-abdominal surgery, has a nasogastric tube. The nurse on duty notes that the nasogastric tube (NGT) is draining a large amount (900 cc in 2 hours) of coffee ground secretions. The client is not oriented to person, place, or time. The nurse contacts the attending physician and STAT ABGs are ordered. The results from the ABGs show pH 7.57, PaCO2 37 mmHg and HCO3 30 mEq/L. What is your assessment?

Accepted Answer

Answer reason: Here the HCO3− is elevated (30 mEq/L) while PaCO2 is normal (37 mmHg), indicating a primary metabolic alkalosis with no respiratory compensation yet. With uncompensated metabolic alkalosis, PaCO2 would remain within the normal range, whereas partial compensation would show an elevated PaCO2 from hypoventilation. The clinical context of large gastric losses via NGT also supports metabolic alkalosis due to loss of hydrochloric acid and volume depletion, which can contribute to altered mental status.

Question 27

If a client’s prostate enlargement is caused by a malignancy, which of the following blood examinations should the nurse anticipate to assess whether metastasis has occurred?

Accepted Answer

Answer reason: Acid phosphatase (particularly the prostatic fraction) is historically associated with metastatic prostate carcinoma and may be elevated when spread has occurred. In contrast, creatinine, nonprotein nitrogen, and creatinine clearance primarily reflect renal function/obstructive uropathy rather than metastatic burden. Therefore, the test most aligned with evaluating possible metastatic progression among the options is the acid phosphatase level.

Question 28

An older person experiencing homelessness was admitted to the emergency department due to shortness of breath, fever, and a productive cough. Upon examination, crackles and wheezes are noted in the lower lobes; he appears to be tachycardic and has a bounding pulse. Measurement of arterial blood gas shows pH 7.2, PaCO2 66 mm Hg, HCO3 27 mmol/L, and PaO2 65 mm Hg. As a knowledgeable nurse, you know that the normal value for pH is?

Accepted Answer

Answer reason: 7.40 Normal arterial blood pH is maintained in a narrow range (about 7.35–7.45) to support enzyme function and cellular metabolism. The closest single value representing the midpoint of this normal range is 7.40. Values like 7.20 and 7.30 indicate acidemia, while 7.50 indicates alkalemia, so they do not reflect the normal reference. Recognizing the normal pH anchors correct interpretation of ABGs before determining the specific acid–base disorder.

Question 29

The client with insulin-dependent diabetes mellitus (IDDM) has been brought to the emergency room. What should the nurse watch for if blood pH is 7.28?

Accepted Answer

Answer reason: 28 indicates acidemia. In IDDM, the key cause of acidemia in the emergency setting is typically diabetic ketoacidosis, where accumulation of ketoacids lowers serum bicarbonate and produces a primary metabolic acidosis. This pattern is far more characteristic than a primary respiratory process, which would be driven by hypoventilation and CO2 retention. Lactic acidosis can occur with shock or severe hypoperfusion, but the question’s emphasis on IDDM most strongly points to ketoacid-driven metabolic acidosis.

Question 30

Normal level of glucose in CSF is-?

Accepted Answer

Answer reason: This places typical adult CSF glucose around ~45–80 mg/dL when serum glucose is in the normal range. Values substantially below this suggest impaired transport or increased consumption in the CSF (classically bacterial or fungal meningitis). Higher ranges like 75–85 mg/dL can occur with hyperglycemia but are not the standard normal reference range used for CSF.

Question 31

The nurse caring for a client with hypocalcemia would expect to note which change on the electrocardiogram (ECG)?

Accepted Answer

Answer reason: This manifests on ECG as QT interval prolongation, increasing risk for ventricular dysrhythmias such as torsades de pointes. In contrast, a prominent U wave is more characteristic of hypokalemia, not low calcium. A shortened ST segment is typically associated with hypercalcemia rather than hypocalcemia.

Question 32

A nurse is reviewing the arterial blood gas results of a client and note the following: pH 7.45, PCO2 of 30 mm Hg, and HCO3 of 22 mEq/L. Does the nurse know that these results indicate?

Accepted Answer

Answer reason: The HCO3 value is at the low end of normal, which is the expected compensatory renal response in respiratory alkalosis (bicarbonate decreases to help bring pH back toward normal). Because the pH remains at the upper limit rather than fully normalized, compensation is present but not complete. A metabolic alkalosis would require an elevated bicarbonate, and respiratory acidosis would show an increased PaCO2 with acidemia rather than alkalemia.

Question 33

A client being treated for respiratory failure has the following arterial blood gas (ABG) results: pH 7.30, Pao2 75 mm Hg, Paco2 58 mm Hg, HCO3- 27 mEq/L. The nurse interprets that the client has which acid–base disturbance?

Accepted Answer

Answer reason: The PaCO2 is elevated (58 mm Hg), indicating CO2 retention as the primary driver of the low pH, which defines a respiratory acidosis. The HCO3- is slightly elevated (27 mEq/L), consistent with early/partial renal compensation rather than a primary metabolic disorder. A metabolic acidosis would instead show a decreased bicarbonate as the primary abnormality, with PaCO2 typically decreased if compensation is occurring.

Question 34

The most common pregnancy test is?

Accepted Answer

Answer reason: Point-of-care urine hCG tests are inexpensive, rapid, noninvasive, and widely available, making them the standard first-line screening method. Imaging modalities such as X-ray, CT, and MRI do not test for hCG and are not used to diagnose pregnancy. Blood (serum) hCG is more sensitive and can detect pregnancy earlier, but it is less “common” as a quick screening test compared with urine testing.

Question 35

The nurse is admitting a patient suspected of having an acute myocardial infarction. The physician orders lab tests to confirm the diagnosis. An increase in the isoform of creatine kinase (CK-MB) is expected how soon after the onset of chest pain?

Accepted Answer

Answer reason: CK-MB typically begins to increase about 3–6 hours after symptom onset, making this interval the best match among the choices. Very early windows (under ~2 hours) are usually too soon for CK-MB to show a reliable rise, which is why those options are less accurate. Later windows (8–12 hours) can occur with CK-MB but are not the expected earliest rise and therefore are less correct for this question’s timing focus.

Question 36

CBC Test is related to?

Accepted Answer

Answer reason: It is obtained from a venous (or capillary) blood sample and is used to evaluate conditions like anemia, infection/inflammation, bleeding risk, and marrow suppression. Urine tests assess renal/urinary findings rather than cellular blood components, and LFT/KFT are chemistry panels assessing organ function. Therefore, the CBC is specifically a blood-based laboratory test.

Question 37

A nurse cares for a client being investigated for muscular dystrophy. The nurse examines which laboratory finding as most specific for skeletal muscle damage?

Accepted Answer

Answer reason: In muscular dystrophy, ongoing myofiber breakdown releases CK into the bloodstream, often producing marked elevations early in the disease course. Lactate dehydrogenase is a nonspecific marker of tissue injury and can rise with hemolysis, liver disease, and many other conditions, so it is less discriminating. Troponin-T is primarily used to detect myocardial injury, and alkaline phosphatase is more associated with bone and hepatobiliary disorders than skeletal muscle damage.

Question 38

A nurse cares for a client with type I diabetes and a serum blood glucose of 400 mg/dL. Which set of arterial blood gases does the nurse expect to find?

Accepted Answer

Answer reason: Marked hyperglycemia in type 1 diabetes strongly suggests diabetic ketoacidosis, which produces a primary metabolic acidosis from ketone accumulation. A metabolic acidosis is reflected by low pH with a low bicarbonate level. The expected physiologic compensation is respiratory hyperventilation (Kussmaul breathing), which lowers PaCO2. The other options either show respiratory acidosis with elevated bicarbonate or near-normal acid–base values, which do not fit DKA physiology.

Question 39

Which of the following lab tests would be considered Point of Care testing?

Accepted Answer

Answer reason: Point-of-care testing refers to tests performed at or near the patient with rapid results to guide immediate clinical decisions. Capillary blood glucose is commonly measured bedside using a glucometer and is a classic example of POCT. In contrast, sputum culture and a complete metabolic panel typically require laboratory processing and longer turnaround times. While urinalysis can sometimes be done as a dipstick at the bedside, the single best, most universally recognized POCT option listed is bedside glucose monitoring.

Question 40

A young woman is found comatose, having taken an unknown number of sleeping pills an unknown time before. An arterial blood sample yields the following values: pH – 6.90, HCO3 13 meq/liter, PaCO2 68 mmHg. This patient’s acid-base status is most accurately described as?

Accepted Answer

Answer reason: The markedly elevated PaCO2 (68 mmHg) indicates a respiratory acidosis from hypoventilation, which is plausible after sedative overdose. The low HCO3− (13 mEq/L) indicates a metabolic acidosis; in an isolated respiratory acidosis, renal compensation would raise (not lower) bicarbonate. Since both PaCO2 is high and bicarbonate is low, the most accurate interpretation is a mixed (simultaneous) respiratory and metabolic acidosis rather than an uncompensated single disorder.

Question 41

What is the normal range for fasting blood glucose in a healthy adult?

Accepted Answer

Answer reason: 70-100 mg/dL or 3.9-5.6 mmol/L Normal fasting plasma glucose in adults is defined as being below the impaired fasting glucose threshold and well below the diagnostic cutoff for diabetes. This range reflects expected glucose homeostasis after an overnight fast with intact insulin secretion and hepatic regulation. Values around 100–125 mg/dL suggest prediabetes (impaired fasting glucose), making higher ranges inappropriate for “healthy adult.” Values as low as 50–70 mg/dL trend toward hypoglycemia and are not considered a typical normal fasting range for most adults.

Question 42

Which enzyme is most specific for liver cell injury?

Accepted Answer

Answer reason: AST is less specific because it is also abundant in cardiac and skeletal muscle and can be elevated with muscle injury or hemolysis. ALP primarily reflects cholestasis or biliary obstruction and can also be elevated from bone sources, limiting specificity for hepatocyte injury. LDH is ubiquitous in many tissues and is therefore a nonspecific marker of cellular damage.

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