Subarachnoid hemorrhage nausea and vomiting how to treat

Written by Zhang Jin Chao
Neurosurgery
Updated on February 06, 2025
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Patients with subarachnoid hemorrhage experiencing nausea and vomiting can still be treated. Firstly, symptomatic treatment should be conducted, which can include using gastric mucosal protectants and antiemetic medications to effectively alleviate symptoms. Additionally, subarachnoid hemorrhage, nausea, and vomiting are often caused by increased intracranial pressure. In such cases, using mannitol or furosemide to dehydrate can reduce intracranial pressure. Once the intracranial pressure decreases, the symptoms of nausea and vomiting can be greatly improved and alleviated. Of course, some patients may also have complications such as hydrocephalus or intracerebral hematoma. In these cases, surgical interventions like craniotomy for hematoma removal or aneurysm clipping may be necessary, which can gradually relieve and improve the symptoms of nausea and vomiting. Beyond symptomatic treatment, it is also necessary to treat the underlying primary disease, addressing causes such as aneurysms or vascular malformations.

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Written by Liu Yan Hao
Neurology
1min 19sec home-news-image

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.

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Written by Zhang Hui
Neurology
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Differentiation between subarachnoid hemorrhage and cerebral hemorrhage

Subarachnoid hemorrhage and cerebral hemorrhage, though both involve bleeding, have different mechanisms of onset. The first distinction is that cerebral hemorrhage is generally caused by hypertension. Hypertension leads to hyaline degeneration and fibrinoid necrosis of arteries, resulting in bleeding. In contrast, the most common cause of subarachnoid hemorrhage is an aneurysm, which may be related to factors such as smoking and congenital developmental abnormalities. In terms of clinical presentation, cerebral hemorrhage has a sudden onset, with symptoms of headache, nausea, vomiting, but also includes impairments in language functions, and signs of neurological deficits such as limb paralysis. Subarachnoid hemorrhage, on the other hand, typically involves very severe pain, usually without manifestations such as limb paralysis. Furthermore, from a radiological perspective on CT imaging, cerebral hemorrhage is mainly located in the brain parenchyma, while subarachnoid hemorrhage mainly indicates that the site of bleeding is in the subarachnoid space.

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Written by Zhang Hui
Neurology
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Complications of subarachnoid hemorrhage

Subarachnoid hemorrhage is a relatively serious condition. Most patients suffer from this due to the rupture of an aneurysm, while others may have arteriovenous malformations. This disease is associated with complications, with common ones including the following. First, there are acute complications of subarachnoid hemorrhage. Patients usually experience severe pain and vomiting again after their condition stabilizes, and the mortality rate significantly increases. The second complication is cerebral vasospasm, which typically peaks between three days and two weeks. Cerebral vasospasm can easily lead to vascular occlusion and the subsequent formation of cerebral thrombosis. The third type includes acute or subacute hydrocephalus. Additionally, seizures and electrolyte disorders may also occur as complications.

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Written by Wei Shi Liang
Intensive Care Unit
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How is subarachnoid hemorrhage treated?

The treatment of subarachnoid hemorrhage primarily aims to prevent rebleeding, vasospasm, hydrocephalus, and other complications, reducing mortality and disability rates. During the acute phase, keep the patient's head in a raised position, lying on their side, and provide dehydration, sedation, and pain relief; absolute bed rest; monitor blood pressure; and when bleeding is significant, undertake ventricular puncture for drainage. Patients with subarachnoid hemorrhage should generally be admitted to the ICU, monitoring vital signs and changes in neurological signs, ensuring airway patency, maintaining stable respiratory and circulatory functions, resting quietly, avoiding emotional agitation, ensuring smooth bowel movements, and for patients with increased intracranial pressure, appropriately restricting fluid intake.

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Written by Liu Yan Hao
Neurology
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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.