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Serum/Plasma Veronal Buffer pH (Venous)

Published: August 9, 2026Updated: August 16, 2026

This test measures the acidity or alkalinity of blood drawn from your vein. It helps assess how well your body is maintaining healthy blood chemistry.

Quick summary

["Your blood’s pH balance is critical for normal bodily functions—too acidic or too alkaline can signal underlying health concerns."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
7377-5
Short code
Sw Vernal grass BasoBnd Ab Qn
Synonyms
Sw Vernal grass BasoBnd Ab Qn
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
lhr
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What Does This Test Measure?

The test evaluates the pH level in your blood, which is measured using veronal buffer—a chemical solution that stabilizes the reading. Blood pH typically ranges between 7.35 and 7.45 under normal conditions. A pH outside this range may indicate metabolic or respiratory imbalances.

Why Might You Need This Test?

Doctors may order this test if you have symptoms like fatigue, confusion, rapid breathing, or muscle weakness. It’s also used to monitor conditions like kidney disease, diabetes, or severe infections that can disrupt blood chemistry.

Common Conditions Linked to Abnormal pH Levels

Low pH (acidosis) can occur due to conditions like kidney failure, diabetic ketoacidosis, or excessive alcohol use. High pH (alkalosis) may result from vomiting, overuse of antacids, or respiratory issues like hyperventilation.

What to Expect Before the Test

No special preparation is needed, but avoid eating or drinking for at least 8–12 hours before the blood draw. Wear comfortable clothing and arrive with an ID if you have a blood collection site issue.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

pH in Venous Blood

Frequently asked questions

How long will results take?
Results are typically available within 1–3 business days, depending on your lab’s processing time. Follow-up with your healthcare provider if you have concerns about your results.
Can I eat or drink before this test?
Yes, you can eat and drink normally, but avoid food and liquids for 8–12 hours before the blood draw to ensure accurate results.
What does a pH outside the normal range mean?
A pH outside the normal range (below 7.35 or above 7.45) may signal metabolic or respiratory issues. Your doctor will discuss findings with you based on your symptoms and medical history.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy