Purpose Large trans-lamina cribrosa pressure differences (TLCPD) have been suggested to play a role in the development of normal-tension glaucoma. To avoid substantial increases TLCPD upright postures, we hypothesize that collapse optic nerve subarachnoid space (ONSAS) protects eyes from large TLCPDs when stand up, i.e., by preventing low cerebrospinal fluid pressures around nerve. In this stud...

Confirming the patency of the proximal parent and distal artery is necessary in cerebral aneurysm surgery. To understand the relationship between the parent and distal arteries of the aneurysm, the blood vessels running through the subarachnoid space should be extensively dissected, which is time consuming. To examine the efficacy of a temporary clip with indocyanine green (ICG) technique, in w...

Epidural anaesthesia is being regularly practised in many clinical settings and there are many documented complications. Here we report the successful management of accidental migration of epidural catheter into the subarachnoid space causing near collapse in a patient.

(I) Experimental Hydrocephaius: Repeated injections of autogenous blood components into the cisterna magna were given to adult rabbits. Only the whole blood, if injected more than three times, could cause the ventricular dilatation. Hydrocephalus was not produced in animals which received repeated injections of washed red blood cells, plasma or hemolysed red blood cells. However, the breakdown ...

BACKGROUND AND PURPOSE The Chiari I malformation, characterized by tonsils extending below the foramen magnum, has increased CSF velocities compared with those in healthy subjects. Measuring the effect of tonsillar herniation on CSF flow in humans is confounded by interindividual variation. The goal of this study was to determine the effect of herniated tonsils on flow velocity and pressure dyn...

BACKGROUND Traumatic placement of a needle during a neuraxial blockade has been related to many complications such as postdural puncture headache, trauma to neural structures and even spinal hematoma, causing permanent neurologic deficits. Although efforts to minimize the complications caused by traumatic neuraxial blockade have been made, nothing was found to be clear. The authors investigated...

OBJECTIVE The purpose of this study was to elucidate the pathological characteristics of C3-C4 cervical spondylotic myelopathy (CSM) from the radiological study. MATERIALS AND METHODS A total of 31 patients with single level anterior cervical discectomy and fusion (ACDF) at C3-C4 and 46 patients with single level ACDF at C5-C6 were included in this study. We selected C5-C6 level as a represen...

To the Editor: The insertion of an epidural for pain relief in labour was complicated by a dural puncture. During the subsequent infusion the patient complained of numbness over her face. There was no accompanying tinnitus or circumoral numbness and pulse and blood pressure remained within normal limits. On examination an area of numbness, to pain and cold, was confined to the bilateral distrib...