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Critical Lab Values for PTs
Lab values
45
Health Care
Professional
06/10/2011
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Term

Reference values:

 

Sodium

 Definition

Infant: 134-150 mEq/L

Child: 135-145 mEq/L

Adult: 135-145 mEq/L
Term

Critical value (adults):

 

Sodium

 Definition
</= 110 mEq/L
Term

Reference values:

 

Potassium

 Definition

Infant: 3.6-5.8 mEq/L

Child: 3.5-5.5 mEq/L

Adult: 3.5-5.0 mEq/L
Term

Critical values:

 

Potassium

 Definition

Newborn: <2.5 or >8.1 mEq/L

Adult: <2.5 or >6.6 mEq/L

For the PT: <3.2 or >5.1
Term

Reference values:

 

Chloride

 Definition

Infant: 95-110 mEq/L

Child: 98-105 mEq/L

Adult: 95-105 mEq/L
Term

Critical value (adult):

 

Chloride

 Definition
<80 or >115 mEq/L
Term

Reference values:

 

Calcium

 Definition

Infant: 10-12 mg/dl

Child: 9-11.5 mg/dl

Adult: 9-11 mg/dl
Term

Critical values (adult):

 

Calcium

 Definition
<7 mg/dl (tetany), >12 mg/dl (coma)
Term

Reference values:

 

BUN

 Definition

Newborn: 3-12 mg/dl

Infant/Child:5-18 mg/dl

Adult: 10-20 mg/dl
Term

Reference values:

 

Creatinine

 Definition

Newborn: 0.3-1.2 mg/dl

Infant: 0.2-0.4 mg/dl

Child: 0.3-0.7 mg/dl

Adolescent: 0.5-1.0 mg/dl

Adult (f): 0.5-1.1 mg/dl

Adult (m): 0.6-1.2 mg/dl
Term

Reference values:

 

Glucose

 Definition
70-110 mg/dl
Term

Reference values:

 

Carbon dioxide

 Definition
20-29 mEq/L
Term

Reference values:

 

Magnesium

 Definition

Infant: 1.4-2.9 mEq/L

Child: 1.6-2.6 mEq/L

Adult: 1.5-2.5 mEq/L
Term

Critical values (adult):

 

Magnesium

 Definition
<0.5 or >3.0 mEq/L
Term

Reference values:

 

pH, pCO2, HCO3

 Definition

pH: 7.35-7.45

pCO2: 35-45 mmHg

HCO3: 22-36 mEq/L
Term

Critical values:

 

Uncompensated Metabolic Acidosis

 Definition

pH: <7.35

pCO2: Normal

HCO3: <22 mEq/L
Term

Critical values:

 

Compensated Metabolic Acidosis

 Definition

pH: Normal

pCO2: <35 mm Hg

HCO3: <22 mEq/L
Term

Critical values:

 

Uncompensated Metabolic Alkalosis

 Definition

pH: >7.45

pCO2: Normal

HCO3: >26
Term

Critical values:

 

Compensated Metabolic Alkalosis

 Definition

pH: Normal

pCO2: >45 mmHg

HCO3: >26 mEq/L
Term

Critical values:

 

Uncompensated Respiratory Acidosis

 Definition

pH: <7.35

pCO2: >45

HCO3: Normal
Term

Critical values:

 

Compensated Respiratory Acidosis

 Definition

pH: Normal

pCO2: >45 mm Hg

HCO3: >26 mEq/L
Term

Critical values:

 

Uncompensated Respiratory Alkalosis

 Definition

pH: >7.45

pCO2: <35 mm Hg

HCO3: Normal
Term

Critical values:

 

Compensated Respiratory Alkalosis

 Definition

pH: Normal

pCO2: <35 mm Hg

HCO3: <22 mEq/L
Term
Signs of Uncompensated Metabolic Acidosis
 Definition
Headache, fatigue, nausea, vomiting, diarrhea, muscular twitching, convulsions, coma, hyperventilation
Term
Signs of Compensated Metabolic Acidosis
 Definition
Increased respiratory rate
Term
Signs of Unompensated Metabolic Alkalosis
 Definition
Nausia, vomiting, diarrhea, confusion, irritability, agitation, muscle twitching, muscle cramping, muscle weakness, paresthesias, convusions, slow breathing
Term
Signs of Compensated Metabolic Alkalosis
 Definition
Decreased respiratory rate
Term
Signs of Unompensated Respiratory Acidosis
 Definition
Headache, diaphoresis, tachycardia, disorientation, agitation, cyanosis, lethargy, decreased deep tendon reflex
Term
Signs of Compensated Respiratory Acidosis
 Definition
N/A
Term
Signs of Uncompensated Respiratory Alkalosis
 Definition
Rapid deep respirations, light-headedness, muscle twitching, anxiety and fears, paresthesias, cardiac arrhythmia
Term
Signs of Compensated Respiratory Alkalosis
 Definition
N/A
Term

Reference values:

 

Fasting plasma (blood) glucose

 Definition

Newborn: 40-80 mg/dl

Child: 60-100 mg/dl

Adult: 70-100 mg/dl

Adult (>60 y.o.): 80-110 mg/dl
Term

Reference values:

 

Hemoglobin A1c

 Definition

Normal (adult): 4.0-6.0%

Good glucose control: 2.5-5.9%

Fair glucose control: 6.0-7.0%

Poor glucose control: >7.0%
Term
OGTT Levels at fasting & 2 hours
 Definition

Normal fasting: <6.1 mmol/l             <110 mg/dl

Normal 2 hour: <7.8 mmol/l             <140 mg/dl

 

IFG fasting: 6.1 < x < 7.0 mmol/l     110 < x < 126 mg/dl

IFG 2 hour: <7.8 mmol/l                   <140 mg/dl

 

IGT fasting: <7.0 mmol/l                   <126 mg/dl

IGT 2 hour: >7.8 mmol/l                   >140 mg/dl

 

DM fasting: >7.0 mmol/l                   >126 mg/dl

DM 2 hour: >11.1 mmol/l                  >200 mg/dl
Term

Reference values:

 

Prothrombin time

 Definition
12-15 seconds
Term

Reference values:

 

INR

 Definition
0.9-1.1
Term

Reference values:

 

aPTT

 Definition
30-40 seconds
Term

Therapeutic values:

 

aPTT

 Definition

2-2.5 x normal

(60-100 seconds)
Term

Reference values:

 

Platelets

 Definition
150-400 k/mm^3
Term

Reference values:

 

WBCs (cells/mm^3)

 Definition

Newborn (<2-3 wks): 18-40 k

Child: 4.5-14.5 k

Adult: 4.5-11 k

Pregnant women: 4.5-16 k
Term

Reference values:

 

RBCs (10^6/mm^3)

 Definition

Newborn: 5.5-6.0

Child: 4.6-4.8

Adult (f): 4.1-5.1

Adult (m): 4.5-5.3

Pregnant women: Slightly lower
Term

Reference values:

 

ESR (mm/hr)

 Definition

Child: 1-13

Adult (f): 1-25 (30 after 50 y.o.)

Adult (m): 1-17 (20 after 50 y.o.)

Pregnant women: 44-114
Term

Reference values:

 

Hematocrit (%)

 Definition

Newborn: <60

Child: 30-49

Adult (f): 36-46

Adult (m): 37-49

Pregnant women: Decreases in third trimester
Term

Reference values:

 

Hemoglobin (g/dl)

 Definition

Newborn: 17-19

Child: 14-17

Adult (f): 12-16

Adult (m): 13-18

Pregnant women: 11-12
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