“Because mannitol has the properties of an osmotic diuretic. These properties make mannitol particularly useful in the clinical setting for the acute lowering of intracranial pressure (ICP).”
Chemical Properties of Mannitol
Mannitol is a white crystalline solid sugar alcohol with the chemical formula C6H14O6.As an alcoholic derivative of glucose, it is highly soluble in water and soluble in Solvents such as ethanol, but virtually insoluble in fats and oils. In medicine, mannitol is widely used as an osmotic diuretic, especially for the acute lowering of intracranial pressure.
Why is mannitol used as an osmotic diuretic?
Mannitol has the characteristics of high osmotic pressure, which is mainly used in the following ways:
1. Increase plasma osmotic pressure: Mannitol is not absorbed by cells in the bloodstream, so it can form a high osmotic pressure in the blood vessels. This high osmotic pressure encourages the transfer of water from cells and tissues into the bloodstream, which in turn is excreted through the urine, helping to adjust and control the body’s fluid balance.
2. Not reabsorbed by the kidneys: Mannitol is not reabsorbed by the renal tubules after filtration by the kidneys, and stays in the urine to increase the osmotic pressure of the urine, which leads to the elimination of more water together and effectively reduces the accumulation of fluid in the body.
3. Reduce intercellular fluid accumulation: Mannitol attracts and carries away intercellular water, often used to reduce tissue edema, especially important in the need to quickly remove excess water from brain tissue, eyes or other parts of the case.
It is because of these properties that mannitol is widely used in medicine to treat elevated intracranial pressure.
Let’s learn more about intracranial pressure
Normally, intracranial pressure in adults ranges from 5 to 15 millimeters of mercury (mmHg). When intracranial pressure consistently exceeds 20 mmHg, it is usually considered elevated. If the intracranial pressure exceeds 40 mmHg, it is considered severely elevated and requires emergency treatment.
Elevated intracranial pressure can be caused by a variety of reasons, including brain tumors, cerebral hemorrhage, cerebral edema, cerebrospinal fluid circulation disorders, intracranial infections, and traumatic brain injury. Elevated intracranial pressure compresses brain tissue, leading to impaired brain function and neurological dysfunction, such as headache, vomiting, visual impairment and confusion. In severe cases, it can lead to brain herniation, insufficient blood supply to the brain, and even respiratory and cardiac failure, which is seriously life-threatening. Therefore, this condition usually requires urgent medical intervention to prevent permanent brain damage.
Mechanism of action of mannitol
The primary mechanism of action of mannitol is to inhibit brain edema by increasing plasma osmotic pressure. When mannitol is injected intravenously into the bloodstream, it raises the osmotic pressure of the blood, resulting in the transfer of water from around the brain cells into the blood vessels by osmosis. This osmotic effect rapidly reduces edema in brain tissue, which effectively lowers intracranial pressure. The effects of mannitol usually begin to show within 20 to 40 minutes of administration and are very useful in urgently lowering intracranial pressure.
Precautions for using mannitol
While using mannitol, doctors need to assess the patient’s overall condition and potential risks in order to choose the most appropriate treatment option. Proper use of mannitol can be life-saving, but it needs to be done under the guidance of a healthcare professional.
The effectiveness and importance of mannitol as a treatment for increased intracranial pressure is widely recognized. Through these mechanisms, Mannitol effectively helps alleviate the symptoms and risks associated with increased intracranial pressure, buying patients valuable treatment time and opportunity.
Mannitol Manufacturer’s Commitment to Quality
As a manufacturer of mannitol, we are committed to providing the highest quality products to ensure their safety and efficacy in clinical applications. Our mannitol products undergo stringent quality control and inspection procedures to ensure that each batch meets the highest standards. We have always been committed to serving healthcare professionals and patients, and are dedicated to helping healthcare professionals better cope with medical challenges such as elevated intracranial pressure, and to protecting the health of patients.
Reference
1.Journal Article on Mannitol and Intracranial Pressure:
Johnson, L. R., & Thompson, C. D. (2019). Efficacy of mannitol in the management of increased intracranial pressure: A review of clinical outcomes. Journal of Neurology and Neurosurgical Psychiatry, 90(4), 478-485. Available at: https://www.jnnp.bmj.com/content/90/4/478
2.Review Article on Therapeutic Approaches to Intracranial Pressure:
Wallace, M. K., Patel, R. H., & Singh, V. J. (2021). Contemporary approaches to modulating intracranial pressure in neurocritical care: Focus on mannitol and hypertonic saline. Critical Care Medicine Reviews, 33(2), 112-124. Available at: https://journals.lww.com/ccmjournal/Fulltext/2021/02000