Ultrasound Examination (Abdominal or General Organ Imaging)
This test uses high-frequency sound waves to create images of organs, tissues, or structures inside your body. It helps doctors assess health conditions without needing invasive procedures.
["Non-invasive imaging to diagnose or monitor organ health."]
Key facts at a glance
- LOINC
- 18846-6
- Short code
- EXAMINATIONLEVELULTRASOUND
- Synonyms
- —
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What Is an Ultrasound Used For?
Ultrasounds are commonly used to examine abdominal organs (like the liver, kidneys, or gallbladder), check for pregnancy, evaluate blood flow in vessels, or assess soft tissues. They’re also used in musculoskeletal imaging (e.g., joints, muscles) and fetal monitoring. Unlike X-rays, ultrasounds don’t use radiation and are generally safe for repeated use.
How Is an Ultrasound Performed?
You’ll lie on an exam table while a technician applies a gel to your skin. A handheld device (probe) is placed on your body, and gentle pressure creates the images. Some ultrasounds require you to hold your breath or change positions. The procedure is painless but may feel slightly warm or tingly.
Preparation for an Ultrasound
Most abdominal ultrasounds require you to fast for 6–8 hours before the test (unless otherwise instructed). For pelvic ultrasounds, you may need to drink water beforehand to fill your bladder. Avoid lotions or creams on the exam area. If you’re pregnant, inform your doctor about any medications you’re taking.
Risks and Considerations
Ultrasounds are generally safe with minimal risks. Rarely, you might experience mild discomfort, bruising, or a temporary feeling of pressure. If you have a pacemaker, metal implants, or severe obesity, your doctor may need to adjust the procedure. Always inform your technician about any allergies or concerns.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Ultrasounds play a key role in diagnosing conditions like gallstones, kidney stones, tumors, inflammation, or vascular issues. They’re also used to guide procedures (e.g., biopsies) and monitor chronic conditions (e.g., heart disease, pregnancy). Unlike CT scans or MRIs, ultrasounds are portable, cost-effective, and don’t expose you to radiation.
Short name
Ultrasound Scan
Frequently asked questions
How long does an ultrasound take?
Do I need to prepare differently for a pelvic ultrasound vs. abdominal ultrasound?
Can ultrasounds detect everything?
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