Tobramycin Concentration in Blood by Microscopic Visualization (Qualitative)
This test checks for the presence of the antibiotic tobramycin in your blood using a microscopic method. It helps determine if your body is responding to treatment for an infection caused by bacteria sensitive to this drug.
["This test helps confirm if tobramycin is effective against bacterial infections in your bloodstream."]
Key facts at a glance
- LOINC
- 101496-8
- Short code
- Tobramycin Bld Pos MIC.VOC det
- Synonyms
- Tobramycin Bld Pos MIC.VOC det
- Category
- chemistry
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- mic-voc-detection
- 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 This Test Measures
The test involves examining a sample of your blood under a microscope to look for the antibiotic tobramycin. If bacteria are present that are sensitive to tobramycin, the test may detect the drug’s presence in the bloodstream. This method is qualitative, meaning it only tells you whether the drug is present or not, not how much.
Why It’s Done
Your healthcare provider may order this test if you’re receiving tobramycin treatment to check for infection-related bacteria in your blood. It’s particularly useful in monitoring patients with serious infections where tobramycin is prescribed.
Sample Collection and Preparation
A blood sample is drawn from a vein, typically in your arm. The sample is then processed and examined under a microscope to identify the presence of tobramycin. This test does not provide a quantitative measurement of the drug concentration.
What to Expect Before the Test
There are no special preparations needed for this test. You may feel slight discomfort from the needle insertion, but it usually resolves quickly. If you’re on blood-thinning medication or have bleeding disorders, inform your healthcare provider beforehand.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This qualitative test helps confirm whether tobramycin is effective against bacterial infections in your blood. Positive results may indicate that the drug is present in sufficient amounts to combat the infection, while negative results suggest either inadequate drug levels or resistance by the bacteria. It supports decisions about continuing or adjusting your antibiotic treatment.
Short name
Tobramycin Blood Culture Qualitative Microscopy
Frequently asked questions
What does a positive result mean?
How long does it take to get results?
Can this test detect all types of infections?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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