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HomeLab Services GuideTests
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Overview
ข้อมูลทั่วไป Specimen
ข้อมูลสิ่งส่งตรวจ Performance
ข้อมูลการทดสอบ Clinical & Interpretation
ข้อมูลทางคลินิก
 
Test Code (รหัสการทดสอบ):
090-20-0280-02
Order Name (ชื่อการทดสอบ):
Blood Gas-ICU, Arterial blood
 
Specimen / Container (สิ่งส่งตรวจ/ภาชนะ):
  1. Blood/Lithium heparin (Green top), 6 mL  1 Tube or
  2. Blood/Syringe or Capillary with Lithium heparin as preservative 
 
Turnaround Time (ระยะเวลารอผล):
Collected specimen to report within 1.5 hours (90 mins)
 
Useful For (ประโยชน์การทดสอบ):
Evaluate symptoms of an oxygen, carbon dioxide, or pH imbalance. The symptoms can include:
  • shortness of breath
  • difficulty breathing
  • confusion
  • nausea

These symptoms may be signs of certain medical conditions, including asthma and chronic obstructive pulmonary disease (COPD).

Your doctor may also order a blood gas test if they suspect you’re experiencing any of the following conditions:
  • lung disease
  • kidney disease
  • metabolic disease
  • head or neck injuries that affect breathing
  • Identifying imbalances in your pH and blood gas levels can also help your doctor monitor treatment for certain conditions, such as lung and kidney diseases.
 
Methodology (วิธีการทดสอบ):
pH : Direct ISE
pCO2 : Severinghaus
pO2 : Amperometric
SO2 : Calculation
Hct : Conductivity/ Na+ correction
Ionized calcium : Direct ISE
Glucose : Enzyme/ Amperometric
Lactate : Enzyme/ Amperometric
BE : Calculation
HCO3 : Calculation
TCO2 :  Calculation
 
Test List In Profile (การทดสอบใน Profile):
pH
pCO2
pO2
SO2
Hct
Ionized calcium
Glucose
Lactate
BE
HCO3
TCO2
 
 
 
Test Code (รหัสการทดสอบ):
090-20-0280-02
Order Name (ชื่อการทดสอบ):
Blood Gas-ICU, Arterial blood
 
Collection Specimen Or Container (สิ่งส่งตรวจ/ภาชนะ):
  1. Blood/Lithium heparin (Green top), 6 mL  1 Tube or
  2. Blood/Syringe or Capillary with Lithium heparin as preservative 
 
Specimen Testing Type (สิ่งส่งตรวจที่ใช้ในการทดสอบ):
Lithium heparin Whole blood , minimum volume 0.5 mL
 
Sub Mission Container (ภาชนะส่งตรวจ):
Plastic vial
 
Rejection Criteria (เกณฑ์ปฏิเสธสิ่งส่งตรวจ):
Over 15 minutes at room temperature will be reject.
 
Specimen Stabillity (ความคงตัวของสิ่งส่งตรวจ):
Specimen Type Temperature Time
Lithium heparin Whole blood Refrigerated, 2oC to 8oC 15 minutes
 
 
 
Test Code (รหัสการทดสอบ):
090-20-0280-02
Order Name (ชื่อการทดสอบ):
Blood Gas-ICU, Arterial blood
 
Method detail (วิธีการทดสอบ):
pH : Direct ISE
pCO2 : Severinghaus
pO2 : Amperometric
SO2 : Calculation
Hct : Conductivity/ Na+ correction
Ionized calcium : Direct ISE
Glucose : Enzyme/ Amperometric
Lactate : Enzyme/ Amperometric
BE : Calculation
HCO3 : Calculation
TCO2 :  Calculation
 
Schedule (ตารางการทดสอบ):
Tested daily (24 hours)
 
Turnaround Time (ระยะเวลารอผล):
Collected specimen to report within 1.5 hours (90 mins)
 
Performing Location (หน่วยงานที่ทำการทดสอบ):
Chemistry, Laboratory Department Tel. 14162
 
Specimen Retention Time (ระยะเวลาเก็บสิ่งส่งตรวจ):
1 day
 
 
 
Test Code (รหัสการทดสอบ):
090-20-0280-02
Order Name (ชื่อการทดสอบ):
Blood Gas-ICU, Arterial blood
 
 
Reference Value (ค่าอ้างอิง):
Parameter Reference Value Unit
pH 7.350 - 7.450 -
pCO2 35 - 45 mmHg
PO2 95 - 98 %
SO2 95 - 98 %
Hct (Male) 40 - 54 Vol (%)
Hct (Female) 37 - 47 Vol (%)
Ionized calcium 1.09 - 1.30 mmol/L
Glucose 70 - 99 mg/dL
Lactate 0.7 - 2.5 mmol/L
BE -2.0 - 3.0 mmol/L
HCO3 21 - 28 mmol/L
TCO2 22 - 29 mmol/L
 
Interpretation (การแปลผล):
The results of a blood gas test can help your doctor diagnose various diseases or determine how well treatments are working for certain conditions, including lung diseases. It also shows whether or not your body is compensating for the imbalance.

Due to the potential for compensation in some values that will cause the correction of other values, it’s essential that the person interpreting the result be a trained healthcare provider with experience in blood gas interpretation.

The test measures:

Arterial blood pH, which indicates the amount of hydrogen ions in blood. A pH of less than 7.0 is called acidic, and a pH greater than 7.0 is called basic, or alkaline. A lower blood pH may indicate that your blood is more acidic and has higher carbon dioxide levels. A higher blood pH may indicate that your blood is more basic and has a higher bicarbonate level.
Bicarbonate, which is a chemical that helps prevent the pH of blood from becoming too acidic or too basic.
Partial pressure of oxygen, which is a measure of the pressure of oxygen dissolved in the blood. It determines how well oxygen is able to flow from the lungs into the blood.
Partial pressure of carbon dioxide, which is a measure of the pressure of carbon dioxide dissolved in the blood. It determines how well carbon dioxide is able to flow out of the body.
Oxygen saturation, which is a measure of the amount of oxygen being carried by the hemoglobin in the red blood cells.
 
Clinical Reference (เอกสารอ้างอิง):
https://www.healthline.com/health/blood-gases#purpose (Retrieved: 29 May 2020)