a nurse is reviewing the medical record of a female client who has heart failure. the nurse should identify…

a nurse is reviewing the medical record of a female client who has heart failure. the nurse should identify which of the following laboratory results as an indication that the client has fluid volume excess?\n\n- urine specific gravity 1.05 (1.005 to 1.03)\n- hematocrit 49% (37% to 47%)\n- urine ph 4.4 (4.6 to 8)\n- bun 8 mg/dl (10 to 20 mg/dl)

a nurse is reviewing the medical record of a female client who has heart failure. the nurse should identify which of the following laboratory results as an indication that the client has fluid volume excess?\n\n- urine specific gravity 1.05 (1.005 to 1.03)\n- hematocrit 49% (37% to 47%)\n- urine ph 4.4 (4.6 to 8)\n- bun 8 mg/dl (10 to 20 mg/dl)

Answer

Brief Explanations:

To determine fluid volume excess (FVE), we analyze each lab result:

  • Urine specific gravity 1.05 (1.005–1.03): Elevated SG can indicate dehydration (concentrated urine), not FVE.
  • Hematocrit 49% (37%–47%): Hematocrit (Hct) decreases in FVE (dilution from excess fluid), but 49% is elevated (suggests dehydration or hemoconcentration, not FVE). Wait, no—wait, FVE causes decreased Hct (more fluid, so blood cells are diluted). Wait, the options: let's recheck. Wait, the BUN: 8 mg/dL (10–20 mg/dL) is low. Wait, no—wait, the question is which indicates FVE. Let's recall: In FVE, blood is diluted, so Hct decreases, BUN decreases (dilution), urine SG decreases (dilute urine), urine pH may not be specific. Wait, the options:

Wait, the options given:

  1. Urine SG 1.05 (ref 1.005–1.03): elevated (dehydration, not FVE).
  2. Hematocrit 49% (ref 37–47%): elevated (dehydration, not FVE).
  3. Urine pH 4.4 (ref 4.6–8): slightly low, not specific to FVE.
  4. BUN 8 mg/dL (ref 10–20 mg/dL): low. In FVE, blood volume is increased, so BUN is diluted (lower than normal). This matches FVE (excess fluid dilutes BUN). Wait, but let's confirm: FVE (fluid overload) causes hemodilution, so Hct, BUN, and SG (urine) decrease. Wait, but the BUN here is 8 (below 10–20), which is consistent with hemodilution (excess fluid). Wait, but the other options: Hct 49 is high (so not FVE), SG 1.05 is high (dehydration), urine pH 4.4 is low (not FVE). So the only one consistent with FVE (hemodilution) is BUN 8 mg/dL? Wait, no—wait, maybe I mixed up. Wait, FVE: fluid excess, so blood is diluted. So Hct should be decreased, but 49 is increased. BUN: in FVE, BUN is low (diluted). So BUN 8 is low (ref 10–20), which is consistent with FVE. Wait, but let's check again. Alternatively, maybe the correct answer is BUN 8 mg/dL? Wait, no—wait, the question is which indicates FVE. Let's re-express:

Fluid Volume Excess (FVE) = hypervolemia. In hypervolemia, the blood is diluted (more fluid, so solutes like BUN are diluted, Hct is diluted, urine is dilute (low SG)).

So:

  • Urine SG 1.05 (high) → concentrated urine (dehydration) → not FVE.
  • Hematocrit 49% (high) → hemoconcentration (dehydration) → not FVE.
  • Urine pH 4.4 (low) → not specific to FVE.
  • BUN 8 mg/dL (low) → hemodilution (excess fluid dilutes BUN) → consistent with FVE.

Wait, but maybe I made a mistake. Alternatively, maybe the answer is BUN 8 mg/dL. Wait, but let's confirm with nursing knowledge: In FVE, BUN is decreased due to hemodilution. So BUN 8 (below normal) is consistent with FVE. The other options are elevated (SG, Hct) or not specific (urine pH). So the correct answer is the BUN 8 mg/dL option. Wait, but the options are:

The options are:

  • Urine specific gravity 1.05 (1.005 to 1.03)
  • Hematocrit 49% (37% to 47%)
  • Urine pH 4.4 (4.6 to 8)
  • BUN 8 mg/dL (10 to 20 mg/dL)

So the correct one is BUN 8 mg/dL, as it is low (hemodilution from excess fluid), while the others are elevated (SG, Hct) or outside range but not indicative of FVE (urine pH). Wait, but maybe I messed up. Wait, no—FVE causes decreased Hct, decreased BUN, decreased urine SG. So BUN 8 is decreased (consistent), Hct 49 is increased (not consistent), SG 1.05 is increased (not consistent), urine pH 4.4 is decreased (not consistent). So the only one consistent with FVE is BUN 8 mg/dL. Wait, but the question is which indicates FVE. So the answer is the BUN 8 mg/dL option. Wait, but let me check again. Alternatively, maybe the answer is BUN 8 mg/dL.

Wait, no—wait, maybe I got the direction wrong. Let's recall: FVE (fluid overload) → increased blood volume → hemodilution → Hct ↓, BUN ↓, urine SG ↓ (dilute urine). So in the options:

  • BUN 8 (↓) → matches FVE.
  • Hct 49 (↑) → matches dehydration (hemoconcentration), not FVE.
  • SG 1.05 (↑) → matches dehydration (concentrated urine), not FVE.
  • Urine pH 4.4 (↓) → not specific to FVE.

Thus, the correct answer is the BUN 8 mg/dL option. Wait, but the options are presented as radio buttons. The last option is "BUN 8 mg/dL (10 to 20 mg/dL)". So that's the one.

Answer:

The correct option is: BUN 8 mg/dL (10 to 20 mg/dL)