Leukocytes, platelets, and electrolyte status: correlation with acute ischemic stroke severity at Haji Adam Malik Hospital
This cross-sectional study of 90 patients at Haji Adam Malik Hospital found that elevated admission leukocyte and platelet counts are significantly correlated with the severity of acute ischemic stroke, whereas serum electrolyte levels (sodium, potassium, and chloride) show no such association.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
When a blood vessel in the brain becomes blocked, the result is an acute ischemic stroke, a medical emergency that cuts off oxygen and glucose to brain tissue. This event triggers a complex chain reaction within the body. The brain does not simply sit idle while damaged; it launches a defense response that involves inflammation and the activation of blood cells designed to clot. At the same time, the body's internal chemical balance, particularly the levels of salts like sodium and potassium in the blood, can shift due to the stress of the event. Doctors need to know how severe a stroke is the moment a patient arrives at the hospital to decide on the best treatment and to understand the likely outcome. They use a standard scoring system called the National Institutes of Health Stroke Scale, which measures neurological deficits like weakness or confusion, assigning a higher score to more severe impairment. The question researchers have long asked is whether simple blood tests taken immediately upon admission can reveal the true extent of this damage. Specifically, they want to know if the number of infection-fighting white blood cells, the count of clot-forming platelets, or the concentration of essential salts in the blood can serve as early warning signs of how badly the brain has been injured.
A team of researchers at H. Adam Malik General Hospital in Medan, Indonesia, set out to answer this question by looking at the medical records of ninety adults who had been admitted with acute ischemic stroke between 2023 and 2025. The team, led by Bernard Bintang Pustahabima Siagian and colleagues from Universitas Sumatera Utara, focused on the very first blood tests taken when these patients arrived. They compared three specific types of blood markers against the initial stroke severity score. The first two markers were the counts of leukocytes, which are white blood cells that fight infection and drive inflammation, and platelets, which are tiny cell fragments that help blood clot. The third group of markers consisted of electrolytes: sodium, potassium, and chloride, which are vital minerals that help nerves and muscles function. The researchers wanted to see if higher or lower levels of these substances in the blood at the moment of admission matched up with a more severe stroke score.
The study revealed a clear connection between the blood cell counts and the severity of the stroke. The data showed that patients who had higher levels of leukocytes when they walked into the hospital tended to have higher stroke severity scores. This finding aligns with the understanding that a stroke triggers an immediate inflammatory response, causing the body to release more white blood cells into the bloodstream. These cells can sometimes make the situation worse by clogging tiny blood vessels or releasing chemicals that damage brain tissue further. Similarly, the researchers found that patients with higher platelet counts also had more severe strokes. This suggests that a greater number of platelets in the blood may contribute to the formation of larger or more stable clots that block blood flow more completely, leading to greater neurological damage. In this group of patients, those with the highest platelet counts were consistently found among those with the most severe neurological deficits.
In contrast, the levels of the essential salts in the blood told a different story. The researchers found no statistical link between the severity of the stroke and the amounts of sodium, potassium, or chloride present in the patients' blood upon arrival. While other studies have suggested that imbalances in these salts can affect long-term recovery or survival, this specific analysis showed that the initial severity of the brain injury was not predicted by these electrolyte levels. A patient could have a very high stroke severity score with perfectly normal salt levels, or a lower severity score with slightly abnormal ones. This indicates that the immediate damage to the brain is driven more by the mechanics of the blood clot and the inflammatory response than by the body's initial chemical balance.
The researchers concluded that counting white blood cells and platelets in the first moments after a stroke arrives provides valuable information about how serious the event is. These numbers act as a quick, accessible window into the body's inflammatory and clotting response, helping doctors gauge the extent of the injury. However, checking the levels of sodium, potassium, and chloride at that same moment does not offer the same insight into the initial severity. The study was conducted using records from a single hospital, and the researchers noted that their findings are based on a snapshot in time, meaning they cannot prove that these blood cells cause the severity, only that they are associated with it. Nevertheless, the results suggest that for doctors assessing a new stroke patient, the numbers of these specific blood cells are more telling about the immediate crisis than the levels of common salts in the blood.
Drowning in papers in your field?
Get daily digests of the most novel papers matching your research keywords — with technical summaries, in your language.