0 used to refer to the layer of tissue under the arachnoid membrane that covers the brain and spinal cord:
a subarachnoid haemorrhage
a subarachnoid layer
Sonographic imaging permits differentiation of those two intracranial conditions by visualization of the subarachnoid space and the choroid plexus.
We excluded patients with transient ischaemic attacks, subarachnoid haemorrhage and previous cerebrovascular events causing a persistent neurological deficit.
Siting the epidural catheter first ensures no delay in inserting the catheter after subarachnoid injection and possibly compromising the subarachnoid block.
The needle is then advanced immediately into the subarachnoid space and a further dose of local anaesthetic administered.
At follow-up, patients may have residual or recoarctation, hypertension, early atherosclerosis, subarachnoid haemorrhage and premature cardiovascular symptoms.
It is difficult to evaluate the subarachnoid space in the axial plane because the subarachnoid space is observed over the parietal area of the hemispheres.
Fatalities, however, must be expected to occur sooner or later from cerebral or subarachnoid haemorrhage if the blood pressure is allowed to rise unchecked.
In subarachnoid anaesthesia the actual dose (mg) administered is more important than concentration.
