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Subarachnoid hemorrhage
Subarachnoid hemorrhage MR manifestations
Subarachnoid hemorrhage is typically visible on an MR scan, where blood presence can be detected in the cerebral sulci. MR stands for Magnetic Resonance, and it offers various scanning sequences such as T1, T2, diffusion imaging, and fluid-attenuated inversion recovery (FLAIR). Although it may sound complex, these sequences can show high signals in areas of the brain sulci where normally there should be no distinctive signals or colors. After a subarachnoid hemorrhage, these areas show up as brightly lit on the images. Hence, magnetic resonance imaging is particularly sensitive to even small amounts of subarachnoid hemorrhage, especially noticeable in the diffusion imaging sequences where these bright signals are prominently visible.
Postoperative care for subarachnoid hemorrhage
For patients recovering from subarachnoid hemorrhage, a critical aspect of care is to prevent emotional excitement and avoid any exertion initiated by the patients themselves. This includes avoiding forceful movements such as turning over or straining during bowel movements, which are not permitted. Patients must rest in bed absolutely, for four to six weeks. Therefore, during nursing, it is important to assist patients with passive movements, such as turning them over every two hours to gently pat their backs. The purpose of patting the back is to effectively prevent the occurrence of dependent pneumonia, while turning them helps prevent pressure sores. Additionally, assistance can be provided for passive limb movements and massaging the limbs, which can effectively prevent the formation of venous thrombosis in the lower or upper limbs. These are the focal points of nursing that can significantly promote the patient's recovery from their condition.
What to do with a headache from subarachnoid hemorrhage?
Subarachnoid hemorrhage, the most typical symptom of which is headache, often manifests as a sudden severe throbbing or bursting pain. The pain may be localized to a specific area of the head, or it may affect the entire head or neck, and it generally persists continuously. If such a headache occurs, one should first rest in bed, avoid emotional excitement and exerting great force, such as coughing, shouting loudly, or straining during bowel movements, etc. If the pain is unbearable, one can ask a doctor for appropriate pain relief medication. However, if the headache suddenly worsens, one should be cautious of the condition deteriorating and should seek medical advice to investigate the cause of the worsening headache. One should not blindly request medication for pain relief, as it may mask the underlying condition.
Subarachnoid hemorrhage is caused by what?
The most common cause of subarachnoid hemorrhage is the rupture of a cerebral aneurysm. The subarachnoid space is located on the surface of the brain, surrounded by three layers of meninges: from inner to outer, they are the pia mater, arachnoid mater, and dura mater. The space between the pia mater and arachnoid mater is known as the subarachnoid space. Following the rupture of a cerebral aneurysm, blood enters this subarachnoid space, leading to hemorrhage. Subarachnoid hemorrhage is a critical condition in internal medicine, with a relatively high mortality rate. The most common cause is a cerebral aneurysm, and patients who have suffered a subarachnoid hemorrhage should undergo brain MRI and vascular imaging to check for the presence of cerebral aneurysms or vascular abnormalities. If a cerebral aneurysm is present, it needs to be treated promptly. Typical interventions include placing a coiling spring to close off the aneurysm, preventing it from rupturing and thus averting a secondary subarachnoid hemorrhage, which has a mortality rate as high as 50%. Another common cause of subarachnoid hemorrhage is brain trauma, which is also a frequent cause of this condition.
Subarachnoid hemorrhage is a condition.
Subarachnoid hemorrhage refers to the rupture of blood vessels due to lesions at the base or on the surface of the brain, with blood directly flowing into the subarachnoid space, causing a clinical syndrome. This is different from cerebral hemorrhage, which refers to bleeding within the brain tissue itself, not into the subarachnoid space. So, what is the subarachnoid space? The human brain is covered by three layers of membranes: the pia mater, arachnoid, and dura mater. The subarachnoid space is the area between the pia mater and the arachnoid membrane, named as such. When there is a rupture in cerebral vascular malformations or cerebral aneurysms, blood flows directly into the subarachnoid space rather than causing bleeding in the brain tissue. Subarachnoid hemorrhage is considered a very serious medical condition with a very high mortality rate. Its main symptoms include severe headache, increased intracranial pressure, nausea, and projectile vomiting. If it is a second occurrence of subarachnoid hemorrhage, the mortality rate can reach up to 50%. A third occurrence of subarachnoid hemorrhage almost certainly results in death.
The difference between cerebral hemorrhage and subarachnoid hemorrhage
There is a significant difference between cerebral hemorrhage and subarachnoid hemorrhage. For subarachnoid hemorrhage, the specific causes are mainly divided into two types. The first cause is due to trauma, violent strikes, car accidents, or falls from heights, leading to localized vascular rupture and extensive subarachnoid hemorrhage. It generally presents as obvious high-density shadows in the ventricular system or cisterns. The occurrence of subarachnoid hemorrhage often leads to symptoms such as headache, dizziness, neck stiffness, and positive meningeal irritation signs. The other situation is spontaneous subarachnoid hemorrhage, most often due to intracranial aneurysms or arteriovenous malformations. Cerebral hemorrhage is primarily due to hypertensive cerebral hemorrhage, which is more likely to occur, mostly seen in the bilateral basal ganglia, presenting as localized high-density shadows.
Symptoms and signs of subarachnoid hemorrhage
The typical symptoms of subarachnoid hemorrhage include headache, vomiting, and sudden severe pain, accompanied by vomiting, pale complexion, and whole-body cold sweats. Additionally, there may be disturbances in consciousness and psychiatric symptoms. Most patients do not experience disturbances in consciousness, but may exhibit restlessness and agitation. Severe cases can show varying degrees of clouded consciousness, and even coma, with a few instances displaying seizures and psychiatric symptoms. Furthermore, signs of meningeal irritation are also present, particularly common and pronounced in young and middle-aged patients, characterized by neck stiffness, headaches, and vomiting.
Complications of subarachnoid hemorrhage
Subarachnoid hemorrhage is a very dangerous disease primarily caused by the rupture of the meninges or blood vessels at the base of the skull, leading to blood entering the subarachnoid space. Clinically, the most common cause is an aneurysm, but it can also occur with some arteriovenous malformations. Subarachnoid hemorrhage can cause severe headaches, nausea, vomiting, and other complications, with severe cases leading to coma. Common complications of subarachnoid hemorrhage include, firstly, rebleeding. The probability of rebleeding is very high, and if it occurs, the disability and mortality rates of the patient significantly increase. Secondly, cerebral vasospasm, which is an important complication that can lead to severe cerebral thrombosis due to intense constriction of the blood vessels. Thirdly, it can cause secondary hyponatremia, leading to electrolyte imbalance. Additionally, complications of subarachnoid hemorrhage include increased intracranial pressure, hydrocephalus, and more.
Subarachnoid hemorrhage headache causes
Subarachnoid hemorrhage commonly presents with clinical symptoms such as headache, reflex vomiting, and even consciousness disorders, seizures, etc. The main reasons for headaches caused by subarachnoid hemorrhage are, firstly, increased intracranial pressure, and secondly, impaired absorption of cerebrospinal fluid, leading to excessive accumulation in the subarachnoid space causing headaches. Additionally, blood entering the subarachnoid space can stimulate the meninges and toxic substances can also cause headaches. Therefore, patients should go to the hospital for a complete cranial CT examination and consult with the Department of Neurology or Neurosurgery.
Does subarachnoid hemorrhage have a genetic component?
Subarachnoid hemorrhage, this disease does not have a significant genetic tendency, so there is no need to worry excessively. The main cause of the bleeding is the rupture of an aneurysm, which is due to abnormal blood vessel development resulting in fusiform aneurysms that rupture and bleed under certain conditions. Additionally, there are other causes of subarachnoid hemorrhage, such as long-term smoking which can cause arterial disease, some arteriovenous malformations are also prone to rupture and bleed, and some traumatic injuries can also lead to subarachnoid hemorrhage; these are not hereditary. Subarachnoid hemorrhage is a rather dangerous condition, so it is essential to control risk factors, properly manage blood pressure, and absolutely avoid smoking. If severe headaches, nausea, and vomiting occur, it is crucial to be highly vigilant and seek medical attention at a hospital immediately.