A stroke is a medical emergency that requires swift treatment. Brain cells need oxygen-rich blood to function and survive, and a stroke occurs when there is a blockage or interruption of blood flow within the brain. To diagnose a stroke, doctors will conduct a physical and neurological exam, imaging tests, and blood tests. One of the first blood tests administered is a complete blood count (CBC) test, which measures the number of platelets and red and white blood cells in the blood. This test can suggest certain conditions that may be associated with a stroke, such as leukemia, anemia, or an infection. A CBC test can also detect clotting issues that may cause a stroke.
Characteristics | Values |
---|---|
Purpose | To determine the type of stroke, its cause, the affected area of the brain, and whether there is bleeding in the brain. |
Tests | Physical exam, neurological exam, imaging tests, blood tests |
Imaging Tests | CT scan, MRI, DSA, PET, cerebral angiogram, MRA, ECG, EEG, carotid ultrasound scan, TCD ultrasound, lumbar puncture |
Blood Tests | CBC, blood lipid test, markers-of-inflammation tests, blood chemistry tests, toxicology tests, D-Dimer test, SPEP, ANA test, APLA panel tests, coagulation tests, homocysteine tests, cardiac enzyme tests, infectious disease tests, genetic testing |
What You'll Learn
To check for conditions that may be associated with a stroke such as leukemia, anemia, or infection
A complete blood count (CBC) is a common blood test often performed for people living with leukemia. It is also one of the first tests doctors will perform when evaluating a patient suspected of having a stroke. This is because a CBC can help doctors rule out other factors that may be causing stroke-like symptoms.
A CBC measures the number of platelets, red blood cells, and white blood cells in a patient's blood. The results of this test can suggest certain conditions that may be associated with a stroke, such as leukemia, anemia, or an infection.
Leukemia is cancer of the blood or bone marrow. It can affect blood cell counts in various ways. For example, in acute lymphocytic leukemia, there may be a large number of immature white blood cells and low numbers of red blood cells and platelets. On the other hand, in chronic lymphocytic leukemia, mature cell counts are closer to normal, resulting in less severe symptoms.
Anemia may occur when the bone marrow produces too few red blood cells or when a disease destroys them. It can also result from low levels of iron, vitamin B12, or folate in the diet, or from heavy or persistent bleeding. Anemia can cause fatigue, weakness, shortness of breath, and pale skin.
Infections can be bacterial, fungal, or viral. They can also be a sign of a rheumatological condition or a heart valve infection. Infections can cause fever, cough, white patches in the mouth, problems urinating, and diarrhea, among other symptoms.
By understanding the underlying conditions that may be associated with a stroke, doctors can better determine how to treat and prevent future strokes.
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To check for stroke-like symptoms caused by seizures
A complete blood count (CBC) is a simple blood test that can be used to check for stroke-like symptoms caused by seizures. It does so by providing information about the different cell types in the blood, including red blood cells, white blood cells, and platelets. These cells play a crucial role in oxygen transport, infection-fighting, and blood clotting, respectively.
Seizures can be caused by problems arising outside or directly involving the central nervous system (CNS) or primary epilepsy, which has no identifiable cause. While a detailed history and physical examination are essential in diagnosing seizures, further investigation is often needed. Screening tests, such as a CBC, serum biochemistry, and urinalysis, can provide valuable information about the overall health of the patient and help identify any underlying conditions that may be causing the seizures.
A CBC can detect abnormalities in the blood that could explain stroke-like symptoms caused by seizures. For example, a high white blood cell count could indicate an inflammatory or infectious condition of the CNS, and a very low platelet count could suggest bleeding into the brain, both of which can result in stroke-like symptoms. Additionally, abnormal white blood cells could indicate the presence of cancer, which may also contribute to seizure activity.
By performing a CBC, healthcare professionals can gather important information to differentiate between a stroke and seizure, as well as identify any underlying conditions that may be causing the seizure activity. This information is crucial in developing an appropriate treatment plan and preventing future episodes.
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To check for inflammation which can be an indication of a bacterial, fungal, or viral infection
A stroke is a medical emergency that occurs when the flow of blood to the brain is cut off, meaning brain cells are starved of oxygen and can be damaged within minutes. As such, it is important to get to the emergency room right away if you think you are having a stroke.
Doctors will use a variety of tests to evaluate a patient who is suspected of having a stroke. These include a physical and neurological exam, imaging tests, and blood tests. Blood tests can provide crucial information about a stroke that is necessary for recovery and prevention. One of the first blood tests a doctor will order is a complete blood count (CBC) test. This test measures the number of platelets, red blood cells, and white blood cells in the blood. The results can suggest certain conditions that may or may not be associated with a stroke, such as infection.
Markers-of-inflammation tests are a crucial component of a CBC. Inflammation can be an indication of a bacterial, fungal, or viral infection, or a rheumatological condition. Abnormal inflammatory markers may also be present in vasculitis, in which the body mistakenly attacks blood vessels, or endocarditis, an infection of the heart valves.
Several blood tests look for markers of inflammation, including erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) tests. These tests can help doctors understand whether a stroke has occurred or if something else is causing stroke-like symptoms. For example, abnormally high or low blood glucose (sugar) levels may cause symptoms similar to a stroke.
In addition to ruling out other potential causes of stroke, doctors may also order toxicology tests to rule out recreational drugs and alcohol as potential causes. They may also perform a D-Dimer test to determine if the patient is prone to developing blood clots, as well as a serum protein electrophoresis (SPEP) test to detect cancer if that is suspected as the cause of the stroke.
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To check for clotting ability
A complete blood count (CBC) test is one of the first things a doctor will want to do to get a picture of the main components of a patient's blood. A CBC test measures the number of platelets and red and white cells in the blood. The results can suggest certain conditions that may or may not be associated with a stroke, such as leukemia, anemia, or an infection.
By themselves, high red blood cell or platelet levels can cause the kind of clumping that results in clots that trigger an ischemic stroke. Very low platelet levels could mean that the blood can’t clot and can bleed into the brain, causing a hemorrhagic stroke.
Doctors will also want to check how well a patient's blood is clotting. This can be done through a pair of tests called PT (prothrombin time) and PTT (partial thromboplastin time). These tests can check how quickly a patient's blood clots. If it takes too long, it could be a sign of bleeding problems.
A CBC test can also help doctors determine the right course of treatment. For example, if a patient has high red blood cell or platelet levels, doctors may prescribe blood thinners to prevent clots from forming. Conversely, if a patient has very low platelet levels, doctors may recommend supplements or other treatments to promote clotting and prevent bleeding into the brain.
In addition to a CBC test, doctors may also order a blood lipid test, markers-of-inflammation tests, blood chemistry tests, toxicology tests, and coagulation tests to evaluate a patient's risk of stroke and determine the best course of treatment.
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To check for infection
A complete blood count (CBC) is one of the first tests doctors will perform when a stroke is suspected. A CBC test measures the number of platelets, red blood cells, and white blood cells in the blood. The results can suggest certain conditions that may or may not be associated with a stroke, such as an infection.
Infections, including bacterial infections, the herpes virus, syphilis, and malaria, can lead to a stroke. Treating an infection with the proper antibiotic medication can drastically reduce the toll a stroke takes on a person. Therefore, it is crucial to identify an infection through a CBC test to determine the best course of treatment.
Markers-of-inflammation tests, such as erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) tests, are used to look for markers of inflammation, which can indicate an infection. Abnormal inflammatory markers may also be present in vasculitis, where the body attacks its blood vessels, or endocarditis, an infection of the heart valve.
In addition to a CBC test, doctors will also use imaging tests, such as a CT scan or MRI, to diagnose a stroke. They may also perform blood lipid tests, blood chemistry tests, and coagulation tests to determine the best course of treatment and prevent recurrent strokes.
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Frequently asked questions
A stroke occurs when the flow of blood to the brain is blocked or an artery in the brain ruptures. Brain cells require oxygen-rich blood to function and survive, so a stroke is a medical emergency that requires swift treatment.
A stroke is diagnosed based on symptoms, medical history, a physical exam, and test results. Doctors will use imaging tests and blood tests to determine the type of stroke, its cause, the part of the brain affected, and whether there is bleeding in the brain.
Imaging tests such as computed tomography (CT) scans, magnetic resonance imaging (MRI), digital subtraction angiography (DSA), and positron emission tomography (PET) are used to look at the blood vessels in the brain and help determine the type of stroke and its location.
Blood tests such as a complete blood count (CBC), blood lipid test, markers-of-inflammation tests, and blood chemistry tests are used to evaluate the distribution of blood cells, platelet levels, and the levels of various substances in the blood.
A CBC measures the number of platelets, red blood cells, and white blood cells in the blood. It can help detect conditions such as leukemia, anemia, or infection that may be associated with a stroke. High red blood cell or platelet levels can cause clots that trigger an ischemic stroke, while low platelet levels can lead to a hemorrhagic stroke.