Diagnosis
Doctors often order several tests to try to pinpoint underlying infection.
Blood tests
Blood samples are used to test for:
Evidence of infection
Clotting problems
Abnormal liver or kidney function
Impaired oxygen availability
Electrolyte imbalances
Other lab tests
Other lab tests to identify the source of the infection might include samples of:
Urine
Wound secretions
Respiratory secretions
Imaging tests
If the site of infection is not readily found, your doctor may order one or more of the following imaging tests:
X-ray. X-rays can identify infections in your lungs.
Ultrasound. This technology uses sound waves to produce real-time images on a video monitor. Ultrasound may be particularly useful to check for infections in your gallbladder and kidneys.
Computerized tomography (CT). This technology takes X-rays from a variety of angles and combines them to depict cross-sectional slices of your body's internal structures. Infections in your liver, pancreas or other abdominal organs are easier to see on CT scans.
Magnetic resonance imaging (MRI). This technology uses radio waves and a strong magnet to produce cross-sectional or 3D images of the internal structures of your body. MRIs may be helpful in identifying soft tissue or bone infections.