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Lab Values Nur 106
Lab values for test, function and alterations
| Question | Answer |
|---|---|
| White blood cell count (WBC) | 4500-10,000 mm3 |
| Function of WBC | -Total leukocyte count -Sub divided into 5 types in differential -Determines the presence of infection |
| Decreased alterations in WBC | Viral infections, anemia, drugs |
| Increased alterations in WBC | Acute infection, tissue necrosis, leukemia, drugs |
| Hgb | M-13.5-18 g/dl F-12-15 |
| Function of Hgb | Iron component of RBC that carries O2 |
| Decreased alterations in Hgb | Anemia, hemorrhage, leukemia, over-hydration |
| Increased alterations in Hgb | Dehydration, COPD, heart failure |
| Hct | M-40-54% F-36-46% |
| Function of Hct | Measures the concentration of RBCs found in 100ml of blood 3:1 relationship with Hgb 3hct:1hgb |
| Decreased alterations in hct | Anemia, hemorrhage, leukemia, overhydration |
| Increased alterations in hct | Dehydration, COPD, heart failure |
| Platelet count | 150,000 - 400,000 Critical Values: <50,000 risk for not being able to clot, <20,000 risk for spontaneous bleeding |
| FUnction of Platelet | Basic elements in blood to promote coagulation Clump and stick to rough surfaces Asprin makes platelets less sticky. |
| Decreased alteration in Platelet count | Leukemia, cancer, anemia, autoimmune disease, DIC |
| Increased alteration in platelet count | trauma, surgery, metastatic cancer |
| Glucose | Fasting blood sugar--70-110mg/dl Elderly 70-120mg/dl |
| Function of glucose | -Main energy source -Regulated by glucagons and insulin -Used to diagnose diabetes and monitor oral hypoglycemic drugs. |
| Decreased alterations in glucose | adrenal hypofunction, liver disease |
| Increased alterations in glucose | Diabetes mellitus, adrenal hyperfunction, stress, drugs |
| Electrolytes | Sodium (Na+) Chloride (Cl) Potassium (K+) |
| Na+ | 135-145mEq/L |
| Cl | 95-105mEq/L |
| K+ | 3.5-5.3mEq/L |
| Blood Urea Nitrogen (BUN) | 5-25 mg/dl |
| Function of BUN | -End product of protein metabolism -Excreted by the kidneys |
| Decreased alterations in BUN | severe liver damage, low-protein diet, overhydreation |
| Increased alterations in BUN | dehydration, high-protein diet, prerenal and renal failure, drugs |
| Creatinine | 0.5-1.5mg/dl |
| Function of creatinine | -From the breakdown of muscle -Amount of creatinine proportional to muscle mass. -NOT influenced by hydration and diet -More sensitive indicator for kidney function. -Evaluates glolmerular function |
| What type of body fluid or tissue is a Culture and Sensitivity able to test? | Any body fluid or tissue |
| A culture identifies what? | The presence and type of microorganism. |
| How long does a culture take? | 24 to 72 hrs |
| Sensitivity identifies what? | The antibiotic that will inhibit the growth of the bacteria. |
| Resistant (R) | The antibiotic does not inhibit growth of microorganism. |
| Intermediate (I) | Bacterial growth retardation is inconclusive |
| Sensitive (S) | The antibiotic is effective in inhibiting growth of microorganism. |
| When does a consent need to be signed? | When Pt is recieving a diagnostic test with a contrast medium or invasive procedure. |
| Post-test nursing care after an angiogram | -VS -Monitor pulses, color and temp. distal to catheter insertion site. -Assess catheter insertion site, apply pressure if needed. -Enforce bedrest -Monitor for delayed allergic reactions to contrast. |
| What is an MRI best used for viewing? | -Soft tissue -Central nervous system -Joints |
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